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Open Access Article
1 - Borotellurite bio-silica glasses doped by erbium nanoparticles: Structural and thermal properties
Abdulkarim Muhammad Hamza Umar Sa'ad Aliyu Halimah Mohamed Kamari Ibrahim Gana Geidam Raouf El-Mallawany Nazrin Nazrin Muhammad Nasirudeen Baba -
Open Access Article
2 - Influence of chemical properties of liquid environment on the physical characteristics of laser ablation produced tungsten nanostructures
Zohreh Famili Davoud Dorranian Amir Hossein Sari -
Open Access Article
3 - Study of nonlinear optical properties of platinum and gold nanoparticles under a CW laser irradiation at 532 nm
Mina Eslamifar -
Open Access Article
4 - Photoluminescence study of Au-Ag bimetallic nanoparticles supported on mesoporous silica SBA-15
Saba Estakhri Elham Darabi Behrouz Akbari Adergani Seyed Elahi -
Open Access Article
5 - Modification of surface energy and electrical and thermal properties of spherical polypyrrole nanoparticles synthesized by CTAB for potential application as a conductive ink
Kasra Vahidi Yousef Seyed Jalili -
Open Access Article
6 - Magneto-plasmonic properties of hybrid nanostructures prepared by laser ablation in different solutions
R. A. Ejbarah Ahmed K. Kodeary Talib M. Abbas -
Open Access Article
7 - Modified Brillouin function to explain the ferromagnetic behavior of surfactant-aided synthesized α-Fe2O3 nanostructures
Zahra Alborzi Avanaki Ali Hassanzadeh -
Open Access Article
8 - Synthesis of titanium-silver bimetallic nanoparticles by thermal plasma method
Sahar Sheini Shahrooz Saviz Amir Hossein Sari -
Open Access Article
9 - Influence of size and morphology on the optical properties of carbon nanostructures
Hajar Sadeghi Davoud Dorranian -
Open Access Article
10 - Impact of geometry and magneto-optical properties on field enhancement and optical bistability in core–shell nanoparticles
Tayebeh Naseri Fatemeh Pourkhavari -
Open Access Article
11 - Effect of different alcohols, gelatinizing times, calcination and microwave on characteristics of TiO2 nanoparticles synthesized by sol–gel method
Mahmoud Bahar Masoud Mozaffari Sahar Esmaeili -
Open Access Article
12 - Comparing the structural and magnetic properties of FePt/MgO/Si and FePt/Ag/Si granular nanolayers
M. Sheikhi S. A. Sebt A. Khajehnezhad -
Open Access Article
13 - Estimation of lattice strain in ZnO nanoparticles: X-ray peak profile analysis
P. Bindu Sabu Thomas -
Open Access Article
14 - Electromagnetically induced grating in semiconductor quantum dot and metal nanoparticle hybrid system by considering nonlocality effects
Tayebeh Naseri -
Open Access Article
15 - Effect of polyethylene glycol and propyltrimethoxysilane on structural and optical properties of zinc oxide nanoparticles synthesized by sol–gel process
Djahnit Leila López-González Mar Belhadj Fatima Naitbouda Abddelyamine Benosmane Ali Haddaoui Nacereddine -
Open Access Article
16 - Optical bistability of a plexcitonic system consisting of a quantum dot near a metallic nanorod
Tayebeh Naseri Nader Daneshfar -
Open Access Article
17 - Effect of ion trapping behavior of TiO2 nanoparticles on different parameters of weakly polar nematic liquid crystal
Geeta Yadav Rohit Katiyar Govind Pathak Rajiv Manohar -
Open Access Article
18 - Growth and characterization of TiAlN nanoparticles using low-energy plasma focus device
Hasan Anousha Eslam Ghareshabani -
Open Access Article
19 - Silver nanoparticles dispersed in nematic liquid crystal: an impact on dielectric and electro-optical parameters
Rohit Katiyar Kaushlendra Agrahari Govind Pathak Tripti Vimal Geeta Yadav Kamal Kumar Pandey Abhishek Kumar Misra Atul Srivastava Rajiv Manohar -
Open Access Article
20 - An experimental study of thermal diffusivity of Au nanoparticles: effects of concentration particle size
Esmaeil Shahriari Mohammad Moradi Morteza Raeisi -
Open Access Article
21 - Multiple-layered structure of obelisk-shaped crystalline nano-ZnO prepared by sol–gel route
Saeideh Jurablu Majid Farahmandjou Tahereh Pormirjaafari Firoozabadi -
Open Access Article
22 - Fabrication of Au/ZnO/MWCNTs electrode and its characterization for electrochemical cholesterol biosensor
Davood Ghanei Agh Kaariz Elham Darabi Seyed Mohammad Elahi -
Open Access Article
23 - Investigation the impact of Ag nanoparticles of orange fruit’s peel, chitosan and silamol treatment on tomato nutritional health content
Saeideh Bagheri Pezhman Moradi Fereshteh Nematolahi Vahid Zarinnia Vahid Abdossi -
Open Access Article
24 - Ultrasonic Assisted Removal of Methyl Paraben on Ultrasonically Synthesized Zn(OH)2-NPs-AC: Experimental Design Methodology
Amir Abbas Ghazali -
Open Access Article
25 - Investigating the Performance of Membrane PEEK/PVA Modified with ZnO Nanoparticles in the Permeability and Selectivity of CO2/N2
Arezoo Ghadi Ahmad Bahreini Mojtaba Masoumi -
Open Access Article
26 - Adsorption of Methylene Blue Dye from Aqueous Solution by Using Gamma Alumina Nanoparticles
gholamali haghdoost -
Open Access Article
27 - Platinium-Ruthenium electrocatalyst as sensor electrode for methanol oxidation
Mohammad Yari Sajjad Sedaghat -
Open Access Article
28 - Coating of Iron Oxide Nanoparticles with Human and Bovine Serum Albumins: A Thermodynamic Approach
M. Keshavarz Z. Ghasemi -
Open Access Article
29 - In-situ synthesis and characterization of conducting metal — polyaniline nanocomposites
M. Yari S. Sedaghat -
Open Access Article
30 - Platinum Nanoparticles Deposited on Oxygen-Containing Functional Groups at Carbon Vulcane XC-72 as a Cathode Catalyst for Direct Methanol Fuel Cell
Sajjad Sedaghat Sharehjini Mohammad Yari Omid Moradi -
Open Access Article
31 - Photocatalytic Degradation of Triton X-100 by Zinc oxide Nanoparticles
Masoud Giahi Faegheh Ghanbari -
Open Access Article
32 - Removal of betamethasone sodium phosphate from wastewater using zinc oxide nanoparticles
M. Giahi H. Taghavi S. Habibi Habibi R. Sariri -
Open Access Article
33 - Study of the adsorption of methyl orange from aqueous solution using nickel oxide nanoparticles: Equilibrium and Kinetics Studies
F. Falaki A. Fakhri -
Open Access Article
34 - Synthesis of SnO2 and C,N,S-tridoped SnO2 nanoparticles by Precipitation method
A. Nouri A. Fakhri Arezu Nouri -
Open Access Article
35 - Photocatalytic degradation of methyl orange and Congo red using C,N,S-tridoped SnO2 nanoparticles
Azita Nouri Ali Fakhri Arezu Nouri -
Open Access Article
36 - Adsorption properties of nickel oxide nanoparticles for removal of Congo Red from aqueous solution
Foujan Falaki Ali Fakhri -
Open Access Article
37 - The evaluation of antibacterial activity of TiO2 nanoparticles , EDTA and garlic on standard strain of Pseudomonas aeroginusa by microdilution method
مینا سعادت شهلا رودبارمحمدی رمضانعلی خاوری نژاد الهام تقویImportance of microbial contamination in food industrial is always important health problemespecially in high risk population such as children and old individual. TiO2 nanoparticles wereobtained through the hydrolysis of TiCl4 (Titanium tetrachloride).It was slowly adde MoreImportance of microbial contamination in food industrial is always important health problemespecially in high risk population such as children and old individual. TiO2 nanoparticles wereobtained through the hydrolysis of TiCl4 (Titanium tetrachloride).It was slowly added intodistilled water under constant rotation for 5 hours. This Solution was dried at the 80-100 0C andcalcinated at the 5500C. Size and type of these Nanoparticles were characterized by scanningelectron microscope (SEM) and X-Ray-: Diffraction (XRD) pseudomonas aeroginusa strain(ATCC 27853) were cultured on nutrient agar medium (NA) for 24h at 370C. Suspension byconcentration 1×106 cells/ml was prepared. Minimum Inhibitory Concentration (MIC) test forTiO2 and EDTA and garlic were evaluated.Evaluation of Morphology and diameter of the TiO2 nanoparticles with SEM showed thatnanoparticles were spherical with diameter between 40-65nm. MIC of TiO2 and EDTA andgarlic on pseudomonas aeroginusa ATCC27853 were 2/2, 24/92 and 40 μg/ml respectively.In this study we synthesized the TiO2 nanoparticles with chemical method and showed that ithas antimicrobial activity compared with garlic, EDTA and positive control, so it couldeliminate Pseudomonas aeroginusa in field of food industrial specially in packaging. Manuscript profile -
Open Access Article
38 - Effect of clove oil essence loaded on iron nanoparticles on aminotransferase enzymes and some tissues in rainbow trout (Oncorhynchus mykiss)
مصطفی غفاری علی خسروانی زادهIn the present study 64 speciment of rainbow trout (Oncorhynchus mykiss) with a mean weight155.8±24 g and mean length of 23.7±2 cm randomly allocated in four groups. Fish of threegroups were immersed in water contained 10, 25, 50, and 100 ppm clove (Eugeni MoreIn the present study 64 speciment of rainbow trout (Oncorhynchus mykiss) with a mean weight155.8±24 g and mean length of 23.7±2 cm randomly allocated in four groups. Fish of threegroups were immersed in water contained 10, 25, 50, and 100 ppm clove (Eugeniacaryophillata) oil essence loaded on iron nanoparticles to induce anesthesia in them, and fourthgroup was as indicator. Loss of equilibrium, light anesthesia, regaining equilibrium andcomplete recovery times were precisely recorded. Fish were transferred into separate tanks afteranesthesia, and the blood samples were collected by cutting of the caudal peduncle from 4groups at 3 and 24 hours after recovery times. Blood samples were centrifuged and thebiochemical indices determined in blood plasma included AST and ALT by spectrophotometer.Brain, kidney, branch, heart, lien and liver tissues were extracted and fixed in phosphate bufferfor histopathology. Results indicated that anesthetizing with different concentrations of clove oilessence loaded on iron nanoparticles have no significant effects on amounts ALT and AST inrainbow trout. Also microscopic study of prepared sections from different tissues showed noremarkable side effects. Because recommended dose for induction anesthesia in rainbow troutwas 10 ppm in this research, therefore fivefold of recommended have no side effect even. Acomparison result of this research by results of other researches is indicating that clove oilessence after loading on iron nanoparticles become more safe and effective. Manuscript profile -
Open Access Article
39 - Effect of acute and chronic toxicity of Cu nanoparticles on survival and histopathology of hepatopancreas and gills in Pacific white shrimp (Litopenaeus vannamei)
N. Khosravizadeh, I. Sourinejad, S.A. Johari, Z. Ghasemi L.V.S.,Identification of toxicity effects of nanomaterials in the field of aquatic nanotoxicology is ofgreat significance. This study was conducted to evaluate the effect of acute and chronic toxicityof copper nanoparticles (CuNPs) on survival rate and histopathology of hepato MoreIdentification of toxicity effects of nanomaterials in the field of aquatic nanotoxicology is ofgreat significance. This study was conducted to evaluate the effect of acute and chronic toxicityof copper nanoparticles (CuNPs) on survival rate and histopathology of hepatopancreas and gillsin PL5 of Pacific white shrimp (Litopenaeus vannamei). Acute toxicology test was doneaccording to OECD no. 203 during 96 h and mortalities were recorded every 24 h after exposureof shrimps to concentrations of 0.1‚ 0.32, 1, 3.2, 10, 32 and 100 mg/lit of CuNPs with averagesize of 40 nm. Data of mortalities were analyzed by probit software. Median lethal concentration(LC50) was not determined because there was no special order in acute toxicity data. In fact, nondose-dependent mortalities of this species exposed to CuNPs inhibited the calculation of LC50.In chronic toxicity test, shrimps were exposed to concentrations of 0.1, 0.5 and 1 mg/lit ofCuNPs for 21 days. Gill histology revealed many damages such as severe necrosis, shorteningof the length of the secondary gill lamellae, severe increase of hemocytes and decrease of pillarcells compared to control. Histopathological effects in hepatopancreas of CuNPs exposedshrimps were enlargement of the cell nucleus, necrosis of some cells, as well as reduction of thenumber of functional cells and destruction of the tubules wall in compare to the control. Inconclusion, exposure to CuNPs causes histopathological effects on hepatopancreas and gills ofPacific white shrimp which could finally result in the shrimp mortalities. Manuscript profile -
Open Access Article
40 - Evaluation of anti-bacterial property of modified Nano silver packaging with Photocatalyst TiO2 in sheep’s head and trotters
Sharifan, A., Beheshti Zadeh, R., Ahari, H.*, Anvar, A. .Head and trotters sheep is traditional food in Iran. This product has very microbial load then for first time determine to done it. The current study was designed to evaluate application of silver nanoparticles, as an antimicrobial agent. Effect of Nano silver pack MoreHead and trotters sheep is traditional food in Iran. This product has very microbial load then for first time determine to done it. The current study was designed to evaluate application of silver nanoparticles, as an antimicrobial agent. Effect of Nano silver packaging in reduce microbial load in head and trotters compare with Control sample in the Refrigerator for 4°C for 1,2,3,4 days. Minced Head and trotters sheep (100g of product has 15 g fat, 90 ml⁄gr Cholesterol). this product has bought at Shahrvand mall. Nano - silver coating based on titanium dioxide was used to reduce the microbial load of the product. some Nano-coating of silver on titanium dioxide at a concentration of ppm 1000, 2000, 3000, 3500 and 4000 used at this study. For measurement nanoparticles size used Field Emission Scanning Electron Microscope (fesem) and to know Chemical bond used. The results showed The concentrations of silver nanoparticles ppm 4000 ppm 3500 on Escherichia coli maintaining the relative amounts of byproducts in four days of testing on impact (p<0.05). Average of nanoparticle was. Manuscript profile -
Open Access Article
41 - Study of histopathology and bioaccumulation of Iron oxide (Fe2O3) nanoparticles in liver of common carp (Cyprinus carpio)
Omidzahir, Sh.*, Khodabandehloo, R. , Kardel, F. , Elmi, F. .Increasing production of nanoparticles and its usage in different industries has led concerns about its dangers and toxicity in the environment, but there is not enough information about their toxicity effects, and their safety is unknown. This study tried to evaluate t MoreIncreasing production of nanoparticles and its usage in different industries has led concerns about its dangers and toxicity in the environment, but there is not enough information about their toxicity effects, and their safety is unknown. This study tried to evaluate the bioaccumulation and histopathology of iron oxide nanoparticles (Fe2O3) in liver tissues of Common carp (Cyprinus carpio). To this aim, Common carp fishes were prepared from a fish farm and transferred to the laboratory. After adapting to the laboratory conditions for a week, the fishes were divided into 4 treatments. The first treatment was considered as control and the other treatments received 50, 75 and the 100 milligrams per liter of iron oxide nanoparticles. In the days 14, 21 and 28, the fishes were randomly selected from each treatment and the liver tissues were separated and were examined for bioaccumulation and histopathology. In the present study the result of the statistical analysis showed in the day 21 of the experiment, the concentration of Iron was significantly higher than other treatments in the liver. Histopathological examination in liver showed the most lesions in treatment 4 in day28 included severe necrosis and vacuolar degeneration, infiltration of inflammatory cells mild and hyperemia. The results of present study showed by increasing of dose and exposure time of iron oxide nanoparticles (Fe2O3) the lesions in hepatocytes increased and iron concentration in liver decreased. Manuscript profile -
Open Access Article
42 - The effect of nanosilver oral administration on body function, some blood and biochemical parameters of serum in chickens
M. Rahim, M. Talebi mehrdar,Silver has long been known for its antibacterial properties. In fact, silver nanoparticles, due to the release of silver ions, show such properties against aerobic and anaerobic bacteria and are widely used as additives in poultry diets. Regarding th MoreSilver has long been known for its antibacterial properties. In fact, silver nanoparticles, due to the release of silver ions, show such properties against aerobic and anaerobic bacteria and are widely used as additives in poultry diets. Regarding the antibacterial effects of this compound, research has shown contradictory results that do not indicate beneficial antibacterial effects. For this study, 240 one-day-old male chickens were divided into six groups with four replications. The experimental groups were: control diet (without additives), diet containing 10 ppm of the antibiotic avilamycin, diet containing 400 ml of silver nanoparticles per ton of feed, diet containing 800 ml of silver nanoparticles per ton of feed, diet containing 400 ml of silver nanoparticles per cubic meter of drinking water, diet containing 800 ml of silver nanoparticles per cubic meter of drinking water and to investigate the effect of silver nanoparticles on growth factor and body efficiency and some blood and serum parameters and microbial population of the device Digestive (ileum) of broiler chickens and comparison of antibacterial and growth stimulant effects with avilamycin antibiotic.The results showed a significant increase (P <0.05) in monocytes and chicken feed consumption and an increase in Clostridium population and a significant decrease in triglyceride concentration in the 800 ml group of silver particles in the diet and water (P <0.05), but its effect There was no significant effect on chicken weight gain and feed conversion ratio. Contrary to popular belief, silver nanoparticles are not suitable as a growth stimulant additive to control harmful bacteria in the poultry digestive tract and strengthen the immune system, increasing the feed conversion ratio of broilers. Manuscript profile -
Open Access Article
43 - Antioxidant effect of copper nanoparticles coated with Artemisia annua plant extract in the 2nd degree burns in mice
فرزانه Tavakoli بهناز Karimi babaahmadi موسی Javdani جهانگیر KaboutariBurns trigger intricate inflammatory processes and the generation of free radicals. The anti-inflammatory, antioxidant, and antibacterial characteristics of the Artemisia annua plant have a significant potential for enhancing the healing process for wounds. This study e MoreBurns trigger intricate inflammatory processes and the generation of free radicals. The anti-inflammatory, antioxidant, and antibacterial characteristics of the Artemisia annua plant have a significant potential for enhancing the healing process for wounds. This study examines the impact of an Artemisia annua extract-coated copper nanoparticle ointment on the antioxidant enzyme activity in second-degree burns in mice. After the green synthesis of coated copper nanoparticles, 100 male mice were divided into five groups: control without treatment, eucerin ointment group, 0.2% copper nanoparticle ointment, 0.2% copper nanoparticles coated with Artemisia annua extract ointment, and 5% Artemisia annua extract ointment. The activity of antioxidant enzymes and the level of lipid peroxidation in tissue homogenates were measured on days 14, 7, 3, and 21. SOD, CAT, and GPX activities were all significantly higher on day 7 in the coated copper nanoparticle ointment group compared to the control group (P˂0.05). The level of MDA was also significantly lower in the control group on days 7, 14, and 21 (P 0.05). The extract of the medicinal plant Artemisia annua is useful for making and coating copper nanoparticles. In addition to the advantages of plant extract, copper nanoparticles have a synergistic impact that speeds up the healing of second-degree burn wounds in mice by lowering lipid peroxidation in wound tissue and boosting antioxidant activity. Manuscript profile -
Open Access Article
44 - The synthesis of magnetite nanoparticles functionalized by Nb (V) metalloporphyrin for the selective removal of flouride ions from aqueous media
Tahere Poursaberi Mostafa Hassanisad Kamran TorkestaniAbundance of amounts of fluoride in water resources has a harmful effect on human health. A new magnetic nanoadsorbent was developed by treating Fe3O4 nanoparticles with 3- aminopropyltriethoxysilane and Nb (V)- metalloporphyrin and applied to remove excessive MoreAbundance of amounts of fluoride in water resources has a harmful effect on human health. A new magnetic nanoadsorbent was developed by treating Fe3O4 nanoparticles with 3- aminopropyltriethoxysilane and Nb (V)- metalloporphyrin and applied to remove excessive fluoride from aqueous solutions. Nb (V) - metalloporphyrin was attached to Fe3O4 via the interaction between the carboxylic groups and the amine groups of APTES. Fourier Transform Infrared Spectroscopy (FTIR), elemental analysis, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) were used to characterize the synthesized nanoparticles. The effect of pH, contact time, sorbent dosage and some co-existing anions present in aqueous solution was investigated. The results indicated that under optimal conditions (i.e. pH: 5.5, contact time: 30 min and sorbent dosage: 100 mg) the fluoride removal efficiency of 94.0% can be achieved. Regeneration of fluoride adsorbed material could be possible with NaOH and the modified magnetic nanoparticles exhibited good reusability for four cycles. Manuscript profile -
Open Access Article
45 - The Study of Antimicrobial Effect of Silver Nanoparticles Biosynthesized by the Leaf Aqueous Extract of Kelussia odoratissima Mozaff. against Some Pathogenic Microbes with Food Sources
O. Azizian Shermeh M. Taherizadeh M. Valizadeh A. Ghasemi M. Beigomi A. Kamali DeljooIntroduction: Growth of food pathogenic microorganism is one the major obstacles in the foodindustry. Nano technology has a broad application in all parts of food industry. The developmentof bacterial resistance to antibiotics and antimicrobial effect of silver nanopart MoreIntroduction: Growth of food pathogenic microorganism is one the major obstacles in the foodindustry. Nano technology has a broad application in all parts of food industry. The developmentof bacterial resistance to antibiotics and antimicrobial effect of silver nanoparticles, has caused theattention of researches to this subject. In this study, biosynthesis of silver nanoparticles and theeffective parameters concerned and the antimicrobial effect of them against some food pathogensfor use in antimicrobial packaging has been discussed.Materials and Methods: Silver nanoparticles were synthesized by the leaf aqueous extract ofKelussia odoratissima Mozaff. In order to achieve Silver nanoparticles with a uniform shape andminimum size, effective parameters on synthesis such as: pH of reaction, extract volume,concentration of Ag+ and reaction time, were studied and optimized by UV-Visspectrophotometry. After characterization of nanoparticles using TEM and XRD techniques, theirantimicrobial activities were investigated against Staphylococcus aureus, Bacillus cereus,Escherichia coli, Salmonella tifimurium,Listeria monocytogenes 4b, Aspergilus Flavus,Penicillium expansum, Clavicpes purpurea by Agar Well Diffusion and MIC, methods.Results: Silver nanoparticles that had been biosynthesized with the approximate size of 20-25nm,had high antimicrobial activity against all of microorganisms and this activity was dependent onthe concentration of silver nanoparticles, therefore in very low concentrations, they prevented thegrowth of microorganisms.Conclusion: Biosynthesis of silver nanoparticles, made nanoparticles with minimum size andbetter performance. Currently these nanoparticles can be use in food industry as food disinfectantfilters, food coatings and packaging and cleaning the food pruduction lines. Manuscript profile -
Open Access Article
46 - Effects of Nanocoatings Containing Copper on the Microbial and Physical Characteristics of Milk as Compared to Regular Polyethylene Packaging
S. Ebrahimiasl A. Soltani Chapezad A. JavadiIntroduction: The application of using nanotechnology in food packaging is mixing nanoparticles with packaging material to prevent bacterial deterioration and loss of nutriants in order to improve the shelf life. The aim of this study is to extend the shelf life of milk MoreIntroduction: The application of using nanotechnology in food packaging is mixing nanoparticles with packaging material to prevent bacterial deterioration and loss of nutriants in order to improve the shelf life. The aim of this study is to extend the shelf life of milk by the application of the antibacterial polyethylene packaging that consists of copper nanoparticles. Materials and Methods: Nanocomposite film consisted of copper nanoparticles was prepared by using industrial extruder for milk packaging at 4ºC. Microbial stability, pH variation, thermal stability and nanoparticle release at zero, 7 to 45 days of storing and water vapour permability for the nanocomposite were analyzed in triplicate order. Results: Microbial analysis indicated that the growth rate in nanocomposite consisted of copper nanoparticles decreased significantly by 38 days of storage. pH variations and acid production due to milk deterioration indicated the quality during storage. Thermal analysis of milk after 38 days of packaging in nanocopper packaging confirmed the level of deterioration during storage. The amount of copper released in milk was within permitted level (2.1ppb). SEM and TEM images indicated the presence of copper nanoparticles in polymer base and its hemogeneous distribution in polymer matrix. The application of nanoparticle in milk caused an increase in shelf life. The results showed that by increasing the concentrations of copper nanoparticles, moisture absorption of the film is decreased. Conclusion: The results indicated that synthesized copper/polyethylen composite increased the shelf life of milk during storage. Manuscript profile -
Open Access Article
47 - The Effect of Nano-composite Packaging Carbon Nanotube and Zinc Oxside Nanoparticles Base on Organoleptic and Microbial Properties of Mazafati Brand Dates
Parinaz Asgari omid moradi Behjat TajodinIntroduction: Dates are one of the most Iran's important products and have a main role in people’s nutrition. About 35 percent of this product is converted to waste due to the improper packaging. Nanotechnology might be regarded important in packaging and storage MoreIntroduction: Dates are one of the most Iran's important products and have a main role in people’s nutrition. About 35 percent of this product is converted to waste due to the improper packaging. Nanotechnology might be regarded important in packaging and storage of food by increasing the barrier properties of packaging systems and by improving their properties. In this research work due to the importance of dates, the effect of ZnO Nanoparticles and Carbon Nanotube films on sensory properties and microbial contamination of Mazafati dates are evaluated. Materials and Methods: Mazafati dates of Bam was purchased from Tehran open market. Packages were prepared from the pure Polyethylen (W) and Carbon Nanotube and ZnO nanoparticles (CZ, 0.1, 1 and 2 percent) and filled with fresh Mazafati dates and then were monitored after 90 days intervals. The results were analysed using Duncan's multiple range test. Results: It was shown that by that the using ZnO Nanoparticles and Carbon Nanotube composite films, the microbial load has been significantly decreased. Indeed, the number of lactic acid bacteria in the samples containing carbon nanotubes and nanoparticles of zinc oxide at two percent concentration, have decreased by 0.83 logarithmic cycle. Conclusion: The results indicated that by using nano-films, the shelf life of Mazafati dates might be increased, without negative effects on sensory properties. Manuscript profile -
Open Access Article
48 - The Application of Dill Essential Oil Combined with Zinc Oxide Nanoparticles in Active Coating Based on Carboxy Methyl Cellulose in order to Extend the Shelf Life of Shrimp under Refrigeration Condition
S. Taklavi T. Mostaghim Sh. ShahriariIntroduction: Shrimp among the sea food has the highest commercial demand universally. Due to biochemical, microbiological and physical spoilage after receiving from sea, it has a short shelf life. The object of this research is to improve the shelf life of shrimp caugh MoreIntroduction: Shrimp among the sea food has the highest commercial demand universally. Due to biochemical, microbiological and physical spoilage after receiving from sea, it has a short shelf life. The object of this research is to improve the shelf life of shrimp caught from the sea. Materials and Methods: Active edible Carboxy Methyl Cellulose (CMC)-based coating containing Zinc Oxide nanoparticles (0.03%) and dill essential oil with 0, 1, 2, 3 and 4% levels as biopreservative were prepared to extend the shelf life of shrimp during 12 days of storage at 4 ºC. Results: Using active edible CMC-based coating led to the reduction of pH changes in shrimp coated samples during storage time, therefore coating containing ZnO nanoparticles and 4% dill essential oil were most effective in increasing storage time significantly (p < 0.05) and increased TVB-N content until the end of the 12 days but using ZnO nanoparticles and increasing the concentration of dill essential oil from 0 up to 4% resulted in a significant (p < 0.05) decrease in TVB-N content. Although incorporation of the dill essential oil compared to control significantly (p < 0.05) decreased the L* and increased the b values during storage time and the treated samples with a higher levels of the essential oil had less color changes. However, extending the storage time significantly (p < 0.05) increases the b and reduces the L* values of shrimp samples. Increasing the storage time caused a significant decrease (p < 0.05) in hardness of the shrimp samples but the use of nanoparticles and the essential oil reduces the process of softening. Total aerobic bacteria, E.coli and coagulase-positive Staphylococcus aureus counts showed that number of microorganisms was dependent on the presence of nanoparticles and the essential oil dosage used for treatment as well as storage time. Using high levels of the essential oil led to an increase (p < 0.05) in sensory parameter scores significantly, therefore the treatment containing 3% dill essential oil had the highest acceptability score. Conclusion: The use of 3% dill essential oil as biopreservative along with ZnO nanoparticles in the structure of active edible CMC-based coating is recommended for the preservation of shrimp at 4 ºC. Manuscript profile -
Open Access Article
49 - The Effect of Nanofilm Coating Containing Ag on the Shelf Life of Mazafati Date
Seyyedeh Fatemeh Peyro Mousavi Amir Heidari Nasab Hassan HashemiPour Ali Asghar RajabalipourIntroduction: The aim of this study is to increase the shelf life and improve the quality of the product trade and export in Kerman Province by using coatings containing nanosilver particles and determining the optimal temperature for the storage of this product. Materi MoreIntroduction: The aim of this study is to increase the shelf life and improve the quality of the product trade and export in Kerman Province by using coatings containing nanosilver particles and determining the optimal temperature for the storage of this product. Materials and Methods: In this study, nanocomposite LDPE films containing nanosilver particles were prepared (3%, 5%), Dates from Aziz Abad, Bam were packed in nano-coated coverage and were stored at 50, 20, 8 and 4 UC. The samples were examined after 2, 7, 21 and 53 days. The experiments concerned with pH, TSS, acidity and reducing sugar were carried out according to the approved methods by the Research and Industry Standard Institute of Iran.Results: By increasing the acidity, the pH values decreased for all the samples examined including the control. The acidity for the samples containing 5% nanosilver particles was less than the samples containing 3% nanosilver particles and the control. The control sample showed lower concentration of the reducing sugar as compared to the samples containing 5 and 3% nanosilver particles while TSS values that are related to the ripening of the samples were different for all the samples examined.Conclusion: The samples packed with 5% nanosilver particles and kept for 53 days at 4UC showed better quality as compared to other samples. Manuscript profile -
Open Access Article
50 - Elimination of Lead and Cadmium in Water, Using Green Coated Fe3O4 Nanoparticles
F. Nematollahi Sh. Mozaffari F. Zmani Hargalani M. ZeinaliIntroduction: Various absorbents have been studied for removing heavy metals from water. One of the most effective removals is iron oxide nanoparticles. In recent years many studies have been carried out for modifying the surface of the nanoparticles and increasing its MoreIntroduction: Various absorbents have been studied for removing heavy metals from water. One of the most effective removals is iron oxide nanoparticles. In recent years many studies have been carried out for modifying the surface of the nanoparticles and increasing its effectiveness and efficiency. Materials and Methods: In this paper coated iron oxide nanoparticles were prepared using Polylophium involucratum extract. To examine the structure of the absorbent the infrared spectrometer instrument and SEM were used to check the size of nanoparticles. the average size of them were determined 60 nm. Results: The synthesized coated nanoparticles were used to eliminate lead and cadmium after optimization conditions (pH of 6, absorbent weight of 20 mg, and time of 4 minutes) in water samples. Magnetic green coated nanoparticles have many advantages such as non-toxicity, biocompatibility, shorter extraction time, avoiding the use of organic solvents, low cost, ease of use, high accuracy, recovery and adsorption capacity due to the nanostructure and high ratio of surface to volume. Conclusion: Functionalized nanoparticles by extract of the plant is able to link up with heavy metal ions and increase the efficiency of the nanoparticles in the removal of these two heavy metals. Manuscript profile -
Open Access Article
51 - Green Synthesis of Colloidal Gold Nanoparticles by Curcumin Extracted from Turmeric and Evaluation of its Antioxidant activity
N. Khosh Lahjeha K. Larijani E. Pournamdari F. , Zamani Hargalani H. SaeidianIntroduction: Gold nanoparticles can be used as a protective compound in the packaging of nutritionally valuable materials due to their non-toxic effects on humans and high antibacterial and antioxidant properties. Other applications in the food industry, such as the co MoreIntroduction: Gold nanoparticles can be used as a protective compound in the packaging of nutritionally valuable materials due to their non-toxic effects on humans and high antibacterial and antioxidant properties. Other applications in the food industry, such as the construction of sensors to identify the remnants of hazardous materials from agricultural and industrial processes, are conceivable for these materials. One of the methods of synthesis of these nanoparticles is the use of natural compounds due to reducing the side effects of chemicals, a new approach that in recent years has been referred to as "green chemistry".Materials and Methods: gold nanoparticles were synthesized using curcumin purified from turmeric as the main source of this compound. The synthesis process was investigated using UV-VIS, FT-IR spectroscopy methods. The structure and morphology of the nanoparticles were performed using XRD spectroscopy and TEM and SEM imaging. The antioxidant properties of gold-curcumin nanoparticles were evaluated by DPPH free radical scavenging method.Results: Au-nanoparticles were synthesized using the green chemistry method using curcumin purified from turmeric in the form of a cross and cubic crystal structure of filled funds with an average size of 9.80 nm. Antioxidant studies showed that the free radical scavenging ability of gold-curcumin nanoparticles was increased as compared to pure curcumin.Conclusion: Curcumin as a natural compound with antioxidant properties has the ability to reduce gold ions and convert them into nanoparticles, and due to the use of these nanoparticles in the food industry, this method can be used as a green, inexpensive and eco-friendly. Manuscript profile -
Open Access Article
52 - Determination of the Antioxidant Activity of Calendula officinalis Extract and its Role in Synthesis of ZnO Nanoparticles
F. Nematollahi F. Taheri Konjini F. Zamani HergalaniIntroduction: The synthesis of zinc oxide nanoparticles is valuable due to its applications in the packaging and food industries as permitted additives to increase the shelf life.Materials and Methods: In this research, the synthesis of green nanoparticles of zinc MoreIntroduction: The synthesis of zinc oxide nanoparticles is valuable due to its applications in the packaging and food industries as permitted additives to increase the shelf life.Materials and Methods: In this research, the synthesis of green nanoparticles of zinc oxide were performed by zinc acetate dihydrate. Calendula officinalis extract was used as reducing and stabilizing agent. The prepared ZnO NPs were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Energy dispersive X- ray (EDX) and X-ray diffraction (XRD) analysis.Results: The size of nanoparticles prepared by Calendula officinalis extract was obtained at 8 to 22nm In addition, the antioxidant properties of prepared nanoparticles were analyzed in the terms of total phenolic and flavonoid content. The antioxidant activity of zinc oxide nanoparticles was evaluated using 2,2- diphenyl picryl hydrazyl (DPPH) method. Gallic acid was used as standard to draw the calibration curve. The amount of total phenolic compounds in aqueous extract of the plant was 303 mg of gallic acid per gram.Conclusion: Calendula officinalis extract showed high antioxidant activity and great potential for green synthesis of nanoparticles. The average diameter of nanoparticles synthesized without plant extract as a stabilizer, was larger than the green synthesized one (more than 18 nm). There was also less agglomeration in nanoparticles synthesized by Calendula officinalis extract. Manuscript profile -
Open Access Article
53 - Evaluation of the Effect of Polyethylene Coating Based on Silver Nanoparticles on Increasing the Shelf Life, Qualitative and Microbial Parameters of Wheat Germ
M. Darab Sh. Shahriari H. MozafariIntroduction: It is possible to increase the shelf life and maintain the quality of wheat germ during storage by using suitable packaging. One of the new technologies considered by researchers is the use of packaging based on nanoparticles.Materials and Methods: In this MoreIntroduction: It is possible to increase the shelf life and maintain the quality of wheat germ during storage by using suitable packaging. One of the new technologies considered by researchers is the use of packaging based on nanoparticles.Materials and Methods: In this study, wheat germs were packaged in polyethylene packages containing silver nanoparticles, and the effect of the packaging on the quality characteristics and shelf life of wheat germ were determined. In this research work, at determining the most optimal conditions for the packaging of wheat germ, the effects of weight percent (wt%) of nanosilver (0, 3, and 5%), time of storage (0, 5, and 10 days), and three different temperatures (2, 4, and 6 0C) on the shelf life of wheat germ have been studied.Results: The results showed that temperature, storage time, and concentration of nanosilver in polyethylene packaging had significant effects on moisture, pH, and enzyme activity of wheat germ. Experimental data indicated that the storage time of wheat germ increased by increasing the concentration of nanosilver from 3% to 5% and by decreasing temperature from 6 ° C to 2 ° C for ten days. Nanoparticle packages were significantly (P <0.05) able to reduce mold growth in wheat germ.Conclusion: Based on the results, it might be concluded that the application of films based on silver nanoparticles increases the shelf life of wheat germ. Wheat germ had the highest shelf life in packaging with 5% silver nanoparticles at 2 ° C and was selected as the selected sample. Manuscript profile -
Open Access Article
54 - The Effect of Polylactic Acid Packaging Modified with Clay Nanoparticles on Quality and Shelf life of Mushroom
P. Rezaee Sh. Shahriari T. Mostaghim -
Open Access Article
55 - Synthesis and Characterization of Silver Nanocomposite as a Food Packaging
M. Pooyamanesh H. Ahari A. A. Anvar G. Karim -
Open Access Article
56 - Removal of zinc from aqueous solutions using manganese dioxide nanoparticles
seyed mahdi hosseinifard hadi ghorbaniBackground: Water pollution with heavy metals is one of the most important problems of environmental. The objectives of this research were to synthesis Manganese dioxide nanoparticles and determining its efficiency in the removal of Zinc from aqueous solutions. Methods: MoreBackground: Water pollution with heavy metals is one of the most important problems of environmental. The objectives of this research were to synthesis Manganese dioxide nanoparticles and determining its efficiency in the removal of Zinc from aqueous solutions. Methods: Consequently, Manganese dioxide nano-particles were synthesized using cathode electrochemical deposition method and the effects of pH, contact time, MnO2 concentrations as well as Zinc concentrations were investigated on Zinc removal efficiency using a batch experiment. XRD, FT-IR and Scanning electron microscope (SEM) were used to identify the characterization of synthesized Manganese dioxide nano-particles. Zinc adsorption isotherms were investigated using Langmuir’s and Fruendlich’s equations. The Zn Kinetic isotherms were also studied using Hue et al as well as Lagergren models.Results: SEM results showed that the diameter of nano-particles was 30 to 50 nm. The other results showed that Zn adsorption and its removal were increased with increase in pH and was reached to the maximum amounts of 90/4 % Zn removal and the optimum pH value for adsorption was 6. Contact time has also enhanced the Zn adsorption. The adsorption capacity increased and the adsorption efficiency slightly increased with increasing concentration of Zinc and reducing the adsorbent. Experimental data were shown the best to follow Langmuir model. Langmuir adsorption capacity was found to be 285/71 mgg−1. The results also showed that the absorption of Zinc was obeyed from pseudo-second-order kinetic model.Discussions: The overall results showed that the use of Manganese dioxide nano-particles could be suitable materials with high potential to removal Zinc from aqueous solutions. Manuscript profile -
Open Access Article
57 - Synthesis of Silver Nanoparticles with Sodium Brohydrate by Chemical Revival Method to Produce Biodegradable Antibacterial Silver Nanocomposite by Solution Blending Production of biodegradable antibacterial silver nanocomposites
Zahra Ta'ati jafroudi hamed ahari nekisa sohrabi haghdostBackground and Objective: This study aimed to investigate the antibacterial effect of silver nanoparticles on Gram-negative and Gram-positive bacteria and producing silver nanocomposites with suitable and biodegradable antibacterial properties by Solution Blending metho MoreBackground and Objective: This study aimed to investigate the antibacterial effect of silver nanoparticles on Gram-negative and Gram-positive bacteria and producing silver nanocomposites with suitable and biodegradable antibacterial properties by Solution Blending method. Method: To investigate the antimicrobial properties of silver nanoparticles, silver nanoparticles were first synthesized by NaBH4 reduciton and after performing UV-VIS, DLS, XRD and TEM and FT-IR tests, Staphylococcus aureus as a Gram-positive, Escherichia coli as a Gram-negative bacteri was used, investigated by MIC, MBC and Inhibition Zone. In the next step, the nanocomposite was prepared and prepared by Solution Blending method and its antibacterial activity was evaluated by Inhibition Zone method. Findings: The results showed that silver nanoparticles had inhibitory effect on Staphylococcus aureus, Escherichia coli and Candida albicans at concentrations of 50, 20 and 355 μg / ml respectively and also at concentrations of MIC. 60, 40 and 370, respectively, have the lethal effect on the aforementioned microorganisms (MFC, MBC). A diameter of 3-5 mm was observed around the silver nanoparticles in the cultures of the mentioned microorganisms and in the test of nanocomposite Inhibiion zone, the halo was created based on expected values.the results of the experiments were calculated with 3 replications and the amount of PValue was significant (P<0/0001)by ANOVA method.we used also 3 antibiotic as control for Inhibition zone test. Discussion and Conclusion: Silver nanoparticles showed good inhibitory and lethal effects on Gram-positive and Gram-negative bacteria and Also, the nanocomposites produced by the mentioned method have high antibacterial and viscolastic properties. Manuscript profile -
Open Access Article
58 - Efficiency of Iron Nanoparticles and Cellulosic Wastes for Reclamation of Lead Contaminated Soil and Oak Seedling Establishments
Mahya Tafazoli Seyed Mohammad Hojjati Pourya Biparva Yahya Kooch Norbert Lamersdorf Background and Objective: Due to the contamination of northern forests with heavy metals by activities such as mining, the aim of this study was to use zero-valent iron-nano-particles and cellulosic-waste for reclamation of soil contaminated with lead and to esta More Background and Objective: Due to the contamination of northern forests with heavy metals by activities such as mining, the aim of this study was to use zero-valent iron-nano-particles and cellulosic-waste for reclamation of soil contaminated with lead and to establish oak seedlings. Method: One-year-old oak seedlings were planted in plastic-pots filled with nursery soil in March-2014. Lead was added to the pots at concentrations of 0, 100, 200, 300 (mgkg-1) using lead-nitrate solution. Cellulosic-waste with levels of 0, 10% (W1), 20 %( W2) and 30 %( W2) was added to the pots at the same time of planting. Zero-valent iron-nanoparticles with levels of 0, 1(N1), 2(N2) and 3(N3) mgkg-1 was injected into the soil. The diameter, height, dry weight, bioavailable concentration of lead and amendments efficiency was measured at the end of the growing season. Findings: With increasing levels of amendments (from 10 to 30% for cellulosic-waste and from 1 to 3 mg kg-1 for iron-nanoparticles), an increasing trend in seedlings biomass was observed for all levels of contamination. The highest efficiency for all contamination levels was observed in highest level of each amendment. The efficiency of N3 treatment for Pb 100, Pb 200 and Pb 300 was 79.5, 84.4 and 67.8%, respectively and the efficiency of W3 treatment was 55.6, 74.9 and 63.1%, respectively. Discussion and Conclusion: The use of zero-valent nano-particles had a better efficiency than cellulosic-waste to reduce the bioavailability of lead; therefore, planting native species and using such amendments in planting holes can help the reforestation of contaminated areas. Manuscript profile -
Open Access Article
59 - Evaluation of the Efficiency of Manganese Dioxide Nano-particles (MnO2) in Cadmium Removal from Aqueous Solutions
seyed mahdi hosseinifard Hadi GhorbaniBackground: Today, heavy metals are used in many important industries and technologies, which result in the production of polluted industrial effluents that are harmful to human health and the environment. The aim of this study was to investigate the efficiency of cadmi MoreBackground: Today, heavy metals are used in many important industries and technologies, which result in the production of polluted industrial effluents that are harmful to human health and the environment. The aim of this study was to investigate the efficiency of cadmium removal from aqueous solutions using a suitable new adsorbent for manganese dioxide nanoparticles. Methods: In order to do this, manganese dioxide nanoparticles were synthesized using cathode electrochemical deposition method and the effect of pH, contact time, MnO2 concentration and cadmium concentration on cadmium removal efficiency were investigated in a batch system. Scanning electron microscope (SEM), XRD and FT-IR were used to identify the characterization of synthesized manganese dioxide nanoparticles. Results and Discussion: SEM results showed that the diameters of the particles were 30 to 50 nm. The other results showed that the optimum pH value for adsorption was 7. Contact time enhancement and the concentration absorbent are omitted because they make the efficiency boost. The adsorption capacity increased and the adsorption efficiency slightly increased with increasing concentration of cadmium and reducing the concentration adsorbent. Experimental data were shown the best to follow Langmuir model. Langmuir adsorption capacity, was found to be 42/016 mgg−1. The results also showed that the absorption of cadmium was obeyed from pseudo-second-order kinetic model. The overall results showed that the use of manganese dioxide nanoparticles was a suitable method with high potential for removal of cadmium from aqueous solutions. Manuscript profile -
Open Access Article
60 - Sub-Lethal Effects of Exposure to Copper Oxide Nanoparticles on Growth Indices and Body Biochemical Composition of Common Carp (Cyprinus Carpio)
hasan sahraei Seyyed Abbas Hoseini Seyyed Aliakbar Hedayati Rasoul GhorbaniBackground and Objective: Due to the increasing use of nanoparticles in human activities, as well as its role in reducing the adverse effects of heavy metals on living organisms, at this study the effects of sub-lethal concentrations of copper nanoparticles were discuss MoreBackground and Objective: Due to the increasing use of nanoparticles in human activities, as well as its role in reducing the adverse effects of heavy metals on living organisms, at this study the effects of sub-lethal concentrations of copper nanoparticles were discussed on growth factors and biochemical composition carcass of common carp. Method: 82 carp with an average weight of 42 ± 2 g was prepared and after adaptation for the laboratory condition, were exposed at 42 days at three treatments (10, 40, 80 ppm) and three replicates respectively, also a control group were prepared with three replications under the affect of sub-lethal concentrations of copper oxide nanoparticles. Findings: Analysis of growth indices showed that all growth indices had significantly different (P<0/05) with metal treatments in compared to the control group. So the control group had the highest average body weight, percent of body weight, SGR rate, and feed conversion efficiency with averaging 2.93. The lowest specific growth rate and the highest rate of conversion were related to the treatment number three (80 ppm), respectively. The amount of ash, fat, protein and maximum moisture was observed at the control group. The highest percentage of protein and fat was at treatment (3) and concentration of 80 milligrams per litre of copper oxide nanoparticles that in this regard showed significant differences (P<0.05) with the control group. Discussion and Conclusion: The results indicate that the presence of copper oxide nanoparticles in aquatic ecosystems have negative effects on growth and biochemical composition of fish carcasses even at sub-lethal concentrations, that by increasing the concentration of the nanoparticles in aquatic ecosystems, the influence of these effects will become clearer. Manuscript profile -
Open Access Article
61 - Investigation of Effective Parameters on Starch Adsorption from Aqueous Solutions by Iron-Chitosan Nanoparticles
Khashayar Mohamadbeigy Amir hessam Hassani Seyedeh Hoda Rahmati amirhossein javidBackground and Objective: Starch is widely used in food, pharmaceutical, paper & textile industry in large quantities. The wastewater of these units have high biological oxygen demand (BOD). In this study, the adsorption capacity of starch from aqueous solution was MoreBackground and Objective: Starch is widely used in food, pharmaceutical, paper & textile industry in large quantities. The wastewater of these units have high biological oxygen demand (BOD). In this study, the adsorption capacity of starch from aqueous solution was investigated using metal nanoparticles coated with chitosan. Due to the fact that chitosan biopolymer is non-toxic, biocompatible and biodegradable and also high adsorption capacity, degradability, stability, easily production and low cost, so the possibility of this nanoparticle can be considered in starch wastewater treatment. Material and Methodology: First, magnetic nanoparticles was and the structure characteristics and morphology of this nano particle were investigated. Then, the performance of nano-adsorbent and the effect of effective parameters on starch uptake, such as contact time, adsorbent, initial adsorbent concentration, temperature and pH of the solution, were studied. Finding: The results showed that it is possible the adsorption of starch with metal nanoparticles coated with chitosan. The maximum adsorption 84 present of starch is obtained at pH 5, contact time: 60 minutes and the dosage 2 mg of adsorbent per liter. According on experimental data are more compatible with the Langmuir isotherm than the Freundlich isotherm. The results also showed that these data follow a pseudo-second order kinetic model. Discussion and Conclusion: According to the results, although it is possible to reduce the amount of starch by using magnetic chitosan nanosorbent, but it is necessary to pilot and techno- economical study to investigate hybrid use with other conventional methods in treatment system of starch processing units. Manuscript profile -
Open Access Article
62 - Investigation of photocatalytic removal of methyl orange by titanium dioxide nanoparticles modified with silver and cobalt
Nasim Ziaeifar saber KhodaeiBackground and Objective: In order to investigate the photocatalytic activity of modified titanium dioxide nanoparticles in order to remove methyl orange contaminants, parameters such as the amount of contaminant concentration, the amount of photocatalytic, the pH of th MoreBackground and Objective: In order to investigate the photocatalytic activity of modified titanium dioxide nanoparticles in order to remove methyl orange contaminants, parameters such as the amount of contaminant concentration, the amount of photocatalytic, the pH of the solution and the calcination temperature were investigated. Material and Methodology: In this study, Ag-Co / TiO2 nanoparticles were synthesized by sol-gel method and characterized by TEM, SEM, XRD and EDX techniques. The results of XRD diffraction studies showed that the simultaneous deposition of silver and cobalt had no effect on the crystalline pattern of titanium dioxide. The formation of Ag-Co / TiO2 nanoparticles and their approximate size were confirmed using the XRD spectrum and is about 270 nm. TEM images with a particle size of about 300 nm also confirm the XRD results. The morphology and purity of these synthesized nanoparticles were evaluated through SEM and EDX images. The results of EDX analysis showed that Ag-Co / TiO2 nanoparticles prepared by sol-gel method did not have a peak of impurity in the sample. The photocatalytic activity of Ag-Co / TiO2 nanoparticles under visible light irradiation was evaluated in the removal of methyl orange contaminants. Findings: Co doped TiO2 nanoparticles by Ag and Co were shown to have highest activity as compared with the Ag/TiO2 , Co /TiO2 and pure TiO2 nanoparticles. The highest percentage of methyl orange removal by Ag-Co / TiO2 is 99.5% in 75 minutes. Discussion and Conclusion: The optimum contents of silver and Cobalt for the preparation of co-doped Ag,Co/TiO2 nanoparticles were 0.9 and 0.3 at mol%, respectively Manuscript profile -
Open Access Article
63 - Investigating the removal of xylene from water by ZnO nanoparticles as an adsorbent for petroleum
Behnaz Salehi amir hesam hassani Homayon Ahmad Panahi Seyed Mahdi BorgheiBackground and Objective: Considering the adverse environmental effects and irreparable damages of the chemicals in petroleum compounds, e.g. benzene, toluene, ethylbenzene and xylene, to living organisms, the efficient removal of these pollutants have received much mor MoreBackground and Objective: Considering the adverse environmental effects and irreparable damages of the chemicals in petroleum compounds, e.g. benzene, toluene, ethylbenzene and xylene, to living organisms, the efficient removal of these pollutants have received much more attention to be improved through innovative methods for enhancing the efficiency and impact of removal processes. In this study, the removal of xylene from aqueous solution by modified zinc oxide nanoparticles was investigated. Method: In this study, zinc oxide nanoparticles were synthesized and modified by a four-stage method. The removal of xylene as a toxic petroleum hydrocarbon from aqueous solution by nanoparticles was evaluated. Batch experiments were conducted at room temperature to evaluate the optimum conditions such as the effect of pH, contact time and zinc oxide concentration. Findings: It was found that the optimum adsorption condition can be achieved at pH=6 and contact time of 25 min. Moreover, the percentage of xylene adsorption increased with the increase in concentration of modified zinc oxide nanoparticles. Discussion and conclusion: This study showed that the modified zinc oxide nanoparticles could be used as an effective adsorbent for the removal of xylene from aqueous solution. Manuscript profile -
Open Access Article
64 - Gill Histopathological Changes of Common Carp (Cyprinus carpio) During Exposure to Sub-Lethal Concentrations of Copper Oxide Nanoparticles
hasan sahraei Seyyed Abbas Hoseini Seyyed Aliakbar Hedayati Rasoul GhorbaniBackground and Objective:At the present century, using of copper Nano-particles has increased within the environment. In this regard influx of Nano-materials to the environment may have harmful impact on living organisms, including fish. The aim of this study was to exa MoreBackground and Objective:At the present century, using of copper Nano-particles has increased within the environment. In this regard influx of Nano-materials to the environment may have harmful impact on living organisms, including fish. The aim of this study was to examine histological lesions of cooper nanoparticles on the gill tissue of common carp. Method: In order to investigate the effects of histopathological changes of Nano copper oxide on the gill of carp, 60 pieces of young common carp with an average weight of 42± 2 gr were divided in 3 groups with three replicates for exposure group of Nano copper oxide (10, 40, 80, mg/l of copper oxide) and a control group of fish for 6 weeks. Findings: Histopathology of Gill tissue showed that the copper nanoparticles have such injuries as cell swelling, Aourtism , edema, secondary connecting adjacent blades, shortening of the secondary blade, and hyperplasia. Gill histopathological result showed that at high concentrations (80 ppm), lesions were mostly detachment, hyperplasia and sticking attach Lamela, versus harm in low concentrations (10 and 40 ppm) to form Aurism, inflation squamous cell and the shortening of the secondary blades. Discussion and Conclusion Due to changes of gill tissue in the common carp at various concentrations of copper nanoparticles compared with the control group, it can be concluded that copper nanoparticles can have significant effects on fish gill tissue. Therefore it can be used as a simple and useful tool to assess the impact of these new born contaminants on fish and also human environmental. Manuscript profile -
Open Access Article
65 - Optimization of the parameters affecting the removal of Acid Orange 7 using magnetite nanoparticles via response surface modeling method and Minitab 16 software
Ezatolah Mozafari Amin Saki Aref Faghihi Siavash FathiniaBackground and Objective: Textile and dyeing industry are the largest consumers of drinking water. Therefore, colored wastewaters that generated by the textile and dyeing industry, if discharged into the environment without treatment, can adversely affect aquatic ecosys MoreBackground and Objective: Textile and dyeing industry are the largest consumers of drinking water. Therefore, colored wastewaters that generated by the textile and dyeing industry, if discharged into the environment without treatment, can adversely affect aquatic ecosystems. In this study, magnetite nanoparticles are used to remove the dye (Acid Orange 7) from aqueous solution. Method: The magnetite nanoparticles were produced by a mechanical method using a planetary ball milling, and then the related physical properties were obtained and the chemical analysis was done by XRF, XRD and SEM images. The Heterogeneous Fenton process optimization was performance by response surface modeling with the help of Minitab16 software. The parameters of the initial concentration of the dye (5, 10, 15, 20 and 25 mg/L), the initial concentration of catalyst (0.4, 0.5, 0.6, 0.7 and 0.8 g/L), the initial concentration of hydrogen peroxide (5, 6.75, 8.50, 10.25, 12 mmol/L) and time of the process (8, 10, 24, 32 and 40 minutes) were selected as the factors involved in response surface modeling procedure. Findings: Dimensions of magnetite nanoparticles were determined as less than 50 nm. The amounts of magnetite (Fe3O4) and hematite (Fe2O3) were measured to be 21/68 and 31/22 respectively. Conditions for the initial concentration of the dye (X1), the initial concentration of catalyst (X2), the initial concentration of hydrogen peroxide (X3) and the process time (X4) were obtained as 10 mg / L, 0.7 g / L, 10.25mmol / L, 32 min respectively. ANOVA high correlation coefficients for the proposed model was also obtained (adjusted-R2=0.945 and R2=0.897). Conclusion: In optimal conditions, the removal efficiency of the dye (Acid Orange 7) by magnetite nanoparticles is 100%. Manuscript profile -
Open Access Article
66 - New Artificial Intelligence Modeling for the Photocatalytic Removal of C.I. Acid Yellow 23 in Wastwater
F. Ganbary -
Open Access Article
67 - Preparation of Diazinon Adsorbent NanoComposite using Pine Activated Carbon and Manganese Oxide Nanoparticles
Noraddin Hosseinpour Azad Ehsan Shokri Najmeh NassiriBackground and Objective: The use of activated carbon in company with metal nano catalysts for pesticides removal from the environment has been considered by researchers, recently. This study aimed to remove diazinon residues from water using Nano-MnO2/PAC composite mad MoreBackground and Objective: The use of activated carbon in company with metal nano catalysts for pesticides removal from the environment has been considered by researchers, recently. This study aimed to remove diazinon residues from water using Nano-MnO2/PAC composite mading from Pinus eldarica activated carbon containing manganese dioxide nanoparticles.Method: Initially, the powdered residues of pine cone were treated using phosphoric acid and then converted to activated carbon by chemically heat method under ordinary atmosphere. Then manganese dioxide nanoparticles were synthesized in its substrate. The chemical structure and carbon appearance of the resulting pine fruit and nanocomposite were described by SEM, TEM, XRD, and IR characterization methods. Adsorption tests are performed to evaluate the removal efficiency of diazinon from aqueous solution by applying operational variables including pH (2-10), temperature (16-42 0C), contact time (2-120 min), and at initial concentrations (0.05-100 mg/L) of diazinon was studied.Findings: Microscopic images and spectroscopy showed that manganese dioxide nanoparticles with an approximate size of 37.5 nm were present in the nanocomposite. The results showed that small amounts of nanocomposite (3 mg/L) were able to remove 94.6% of the diazinon with an initial concentration of 40 mg/L. The best description of the adsorption process at optimal pH 4, with fit in the Langmuir isotherm model with a correlation coefficient of 0.985.Discussion and Conclusions: According to results, the presence of manganese dioxide nanoparticles improved the removal efficiency of diazinon by 13.7% compared to activated carbon of pine fruit. Manuscript profile -
Open Access Article
68 - Remediation of Environment via Metallic Iron Nanoparticles
mohammad reza Kamali Alireza Kamali Seyyed Mohammad Mohajerzadeh javad FahimMetallic powders have an important role in detectionand pollutant remediation from environment. Inthis way, iron nanoparticles has served as a newmaterial for environmental remediation. Thereforan economical solutions for many environmentalchallenges in the fields of po MoreMetallic powders have an important role in detectionand pollutant remediation from environment. Inthis way, iron nanoparticles has served as a newmaterial for environmental remediation. Thereforan economical solutions for many environmentalchallenges in the fields of pollutants elimination havebeen invented. Metallic oxide such as TiO2 in ananometric scale as a cheap material, have abilityfor using in photocatalytic process and remediation.In this article in addition of reviewing the propertiesof metallic and oxide nanoparticles in environmentalremediation process, remediation process by metalliciron nanoparticles was investigated and for instance,the remediation process of hexavalent chromium withthese nanoparticles have been illustrated. Manuscript profile -
Open Access Article
69 - Effects of Silver Nanoparticles on Urinary Tract Infections Caused by Gram-negative Bacilli Resistant to Several Antibiotics (MDR)
نشاط غلامی amir hossein MOMEN مسعود زندیAbstractOne of the major problems in hospitals resistance of pathogenic bacteria , including bacteria that cause urinary tract infections(UTI), antimicrobial substances , the problem of increased costs of treatment , treatment failure and mortality rates are increasing. MoreAbstractOne of the major problems in hospitals resistance of pathogenic bacteria , including bacteria that cause urinary tract infections(UTI), antimicrobial substances , the problem of increased costs of treatment , treatment failure and mortality rates are increasing.The purpose of this research is to identify multidrug-resistant Gram-negative bacilli of urinary tract infections with antibiotics and the effect of silver nanoparticles on them.Planting 240 clinical samples from patients admitted to two hospitals ( Fatemiyeh , Besat) within 6 months of 1395 a total of 150 gram negative bacilli of urinary tract infections was isolated. To determine antibiotic resistance of these bacteria, disk diffusion method was used, and their susceptibility was evaluated according to the CLSI(clinical and laboratory Standards Institute) . Gram-negative bacilli isolated were prepared and inhibition zone diameter was measured.The most common bacteria Escherichia coli was isolated and lowest frequencies of the Proteus vulgaris. All of the samples to a solution of silver nanoparticles at concentrations 200 ppm 100 ppm and were sensitive. Pseudomonas aeruginosa (30 mm) and Enterobacter aerogenes (27 mm) maximum diameter in the presence of silver nanoparticles showed 800 ppm.Conclusion: The results show that silver nanoparticles can have an inhibitory effect on all tested Gram-negative bacilli , and the concentration of nanoparticles , the diameter of the growth of Gram-negative bacilli of urinary tract infections resistant to multiple antibiotics increases.Key words: Gram-negative bacilli, Silver nanoparticles, Urinary Tract Infection,Antibiotic Resistance, Hamedan Manuscript profile -
Open Access Article
70 - Green Synthesis of zinc oxide Nanoparticles Using Apple Fruit and investigation its Antimicrobial Effects
Fateme Sadat Hoseini زهرا آقاجانیIn this research, zinc oxide nanoparticles (ZnO) were synthesized using apple extract, and then the physical and chemical properties of ZnO nanoparticles were evaluated using SEM, XRD, EDS, UV-Vis and FT-IR. The average size of ZnO nanoparticles using Debye-Scherrer equ MoreIn this research, zinc oxide nanoparticles (ZnO) were synthesized using apple extract, and then the physical and chemical properties of ZnO nanoparticles were evaluated using SEM, XRD, EDS, UV-Vis and FT-IR. The average size of ZnO nanoparticles using Debye-Scherrer equation was estimated at 10 nm. The nanoparticles synthesized by this method (using apple extract) exhibited antimicrobial properties against Candida albicans, which showed the diameter of the halo created by the specimen in this fungus was 26 mm. The XRD spectrum represents the formation of zinc oxide nanoparticles and is consistent with earlier reports. According to the SEM spectrum, zinc oxide is composed of uniform particles. According to the results of the EDS test, the presence of Zn in the synthesized nanoparticles has been confirmed using apple extract. In this research, zinc oxide nanoparticles (ZnO) were synthesized using apple extract, the physical and chemical properties of ZnO nanoparticles were evaluated using SEM, XRD, EDS, UV-Vis and FT-IR evaluation methods. The average size of nanoparticles ZnO was estimated using a 10-nm DSS equation. The synthesized particles with this method (using apple extract) showed antimicrobial properties against Candida albicans, which showed that the diameter of the halo created by the sample The mushroom was spotted at 26 mm. Manuscript profile -
Open Access Article
71 - Synthesis of zinc oxide nanoparticles with antimicrobial and antibiofilm activity against Klebsiella pneumonia
razieh ahmadinasab soheil Aghaei Mohammad Ali GasemzadehKlebsiella peneumoniae bacterium is part of the natural microfrola of the human body and are found in water, sewage, soil and part of the mouth, pharynx and intestines. Klebsiella can also cause infections in the urinary tract, lower biliary tract, and surgical wound si MoreKlebsiella peneumoniae bacterium is part of the natural microfrola of the human body and are found in water, sewage, soil and part of the mouth, pharynx and intestines. Klebsiella can also cause infections in the urinary tract, lower biliary tract, and surgical wound sites. It is also an opportunistic pathogen for patients with chronic pulmonary disease, enteric pathogenicity, nasal mucosa atrophy, and rhinoscleroma. This organism can causes food poisoning and gastritis. Biofilm formation by this bacterium on many surfaces, is one of the most important problems in the food industry. Metal nanoparticles are effective antimicrobial compounds for controlling and removing of bacterial biofilms from non-biomaterial surfaces. The main purpose of this investigation was synthesis of zinc oxide nanoparticles in-vitro condition and evaluation of their antimicrobial properties for inhibiting of biofilm formation and biofilm eradication of Klebsiella peneumoniae (ATCC700603). Method: In this study nano-particles of zinc oxide were synthesized mechanochemically and were confirmed using UV-vis, FTIR, EDX and Scanning Electron Microscopic procedures. Antimicrobial and antibiofilm properties of synthesized nanoparticles were determined using agar well diffusion and 96 well microplate dilution methods respectively. Results: Synthesized zinc oxide nanoparticles had circular structure with 30 nm size. Biofilm formation of kiebsiella pneumonia was performed using micrtiter plate assay. Antibiofilm activity and biofilm eradication of zinc oxide nanoparticles were obtained at 50 and 500 µg/ml respectively. Conclusions: Our study showed that zinc oxide nanoparticles can be used as the effective antimicrobial agents for inhibiting of biofilm formation of Klebsiella peneumoniae in the food industry. Manuscript profile -
Open Access Article
72 - study the effect of silver nanoparticles against to biofilm in listeria monocytogenes
razieh ahmadinasab soheil Aghaei Mohammad Ali GasemzadehListeria monocytogenes has been isolated from many foods and may cause meningitis, septicemia and abortion in pregnant women. L. monocytogenes forms biofilm on many food contact surface materials and medical devices. Biofilm formation by this bacterium on many surfaces, MoreListeria monocytogenes has been isolated from many foods and may cause meningitis, septicemia and abortion in pregnant women. L. monocytogenes forms biofilm on many food contact surface materials and medical devices. Biofilm formation by this bacterium on many surfaces, is one of the most important problems in the food industry. Metal nanoparticles are effective antimicrobial compounds for controlling and removing of bacterial biofilms from non-biomaterial surfaces. The main purpose of this investigation was synthesis of silver iodide nanoparticles in-vitro condition and evaluation of their antimicrobial properties for inhibition of biofilm formation and biofilm eradication of Listeria monocytogenes(ATCC1298). Method: In this study nano-particles of silver iodide were synthesized respectively sonochemically and were confirmed using UV-Vis ,FTIR, EDX and Scanning Electron Microscopic procedures. Antimicrobial and antibiofilm properties of synthesized nanoparticles were determined using agar well diffusion and 96 well microplate dilution methods respectively. Results: Synthesized Silver nanoparticles had circular structure with 30 nm size. Antibiofilm activity and biofilm eradication of Iodide silver nanoparticles were obtained at 5 and 100 µg/ml respectively. Discussion: Based on obtained results, silver iodide nanoparticles can be used as the effective antimicrobial agents for inhibiting of biofilm formation of Listeria monocytogenes in the food industry. Manuscript profile -
Open Access Article
73 - To evaluate the effect of iron nanoparticles on expression of TEM and SHV genes in Klebsiella pneumoniae isolated from clinical samples using Real Time PCR
najmeh tahmasebi babak kheirkhahBackground: Klebsiella pneumoniae is a germ-negative pathogen and a common cause of nosocomial infections. Increasing the emergence of multi-drug resistance in Klebsiella pneumonia has limited therapeutic options for this bacterium. The purpose of this study was to eval MoreBackground: Klebsiella pneumoniae is a germ-negative pathogen and a common cause of nosocomial infections. Increasing the emergence of multi-drug resistance in Klebsiella pneumonia has limited therapeutic options for this bacterium. The purpose of this study was to evaluate the effect of iron nanoparticles on expression of TEM and SHV genes in Klebsiella pneumoniae isolated from clinical samples using Real- Time PCR. Materials and Methods: A total of 50 strains of Klebsiella pneumoniae were collected from patients admitted to the intensive care unit of hospitals in Kerman on 6 months. The isolates were identified as K. pneumoniae, based on the biochemical tests embedded in the API-20E system. Antibiotic susceptibility test was performed by disc diffusion method. For molecular identification of TEM and SHV genes, PCR was performed. To determine the effect of iron nanoparticles on the strains, a dilution broth method was used according to CLSI standard and finally, Real-Time PCR was performed. Results: In this study, 46 isolates were positive for ESBL producing phenotypes. In the 46 isolates of ESBL producing, 48% (22 cases) had the SHV gene , 13% (6 cases) had the TEM gene and 39% (18 cases) had both SHV + TEM genes. Iron nanoparticles could degrade the expression of TEM and SHV genes in the clinical medium in Klebsiella pneumoniae. Conclusion: Due to the effectiveness of iron nanoparticles on positive beta-lactamases Klebsiellas, can use iron nanoparticles as a medicine dose. Manuscript profile -
Open Access Article
74 - Biosynthesis of Silver Nanoparticles by a native Halotolerant Actinomycete strain Isolated from Soils Qom, Iran
sheida nadernia soheil Aghaei Mohammad Ali GasemzadehAbstract Background:In recent years, ability of microorganisms to synthesize nanoparticles of various sizes, shapes and morphologies, has gained extreme attentions. the point of this study is Biosynthesis of Silver Nanoparticles by a native Halotolerant Actinomycete str MoreAbstract Background:In recent years, ability of microorganisms to synthesize nanoparticles of various sizes, shapes and morphologies, has gained extreme attentions. the point of this study is Biosynthesis of Silver Nanoparticles by a native Halotolerant Actinomycete strain Isolated from Soils of Saline Lake Qom Materials & methods: In the present study, synthesis and characterization, of silver nanoparticles from native isolate of halotolerant Actinomycete strain has been reported. Silver nanoparticles were synthesized by adding the dried biomass of halotolerant actinomycete isolate with 10-3M of nitrate solution adjusted pH 7.2 and in M9 liquid medium. Silver nanoparticles were characterized using ultraviolet and visible absorption spectroscopy, infrared spectroscopy (UV-VIS) Fourier Transform Infrared Spectroscopy(FT-IR), beam X Ray Diffraction(XRD), Dynamic light scattering (DLS), and imaging with Transmission Electron Microscope (TEM). Results:The results obtained from ultraviolet and visible absorption spectroscopy, infrared spectroscopy (UV-VIS) Fourier Transform Infrared Spectroscopy(FT-IR) and beam X Ray Diffraction (XRD), Of the halotolerant actinomycetes strains, the isolate NO.3 was able produce silver nanoparticles under different environmental conditions. Dynamic light scattering (DLS), and imaging with Transmission Electron Microscope (TEM) showed that the average size of silver nanoparticles obtained 28 to100 nm. The results indicated that production of silver nanoparticles was extracellular. Conclusion:The results showed that the native halotolerant actinomycete strains can synthesize silver nanoparticles under different environmental conditions . Keywords: silver nanoparticles, Biosynthesis, halotolerant actinomycetes. Manuscript profile -
Open Access Article
75 - Synthesis and evaluation of magnetic nanoparticles (Fe3O4) to provide the best synthesis method for drug delivery in a controlled manner in the treatment of various types of cancer
Sayed Esmaeil Mohammadi mehr Mehdi Faramarzi Sayed Abotaleb MousaviparsaIntroduction: In this research, nanoparticles were synthesized by two methods of hemolipation and precipitation-reduction under optimal conditions. Using X-Ray Diffraction and Fourier Infrared Spectroscopy (FTIR) tests, the optimal conditions for nanoparticle synthesis MoreIntroduction: In this research, nanoparticles were synthesized by two methods of hemolipation and precipitation-reduction under optimal conditions. Using X-Ray Diffraction and Fourier Infrared Spectroscopy (FTIR) tests, the optimal conditions for nanoparticle synthesis were determined by sediment-reduction method. Finally, by analyzing the images taken by electron microscopy from two samples, the average size of magnetite nanoparticles synthesized by co-precipitation method was measured at 39nm and by sediment-reduction method at 4/5nm. By plotting the particle size distribution, in the co-precipitation method, the particle size distribution of nanoparticles was relatively wide and in the sediment-reduction method, the relatively narrow particle size distribution was obtained. Finally, by comparing the average size, distribution, particle size and morphology of nanoparticles synthesized by the two methods mentioned, magnetite nanoparticles synthesized by sediment-reduction method are proposed for drug delivery applications. Material and methods: This is a research study involving experiments and reviewing library studies on controlled drug delivery systems. After conducting library studies and obtaining sufficient information, laboratory tests of this study were performed. Results: With the creation of particle systems, new properties were introduced into drugs that did not exist before. The use of nanoparticles has led to its optimization and has created features such as therapeutic target, improved cell permeability, longer life, etc. that were not previously available in conventional drugs. Nanoparticles synthesized by the deposition-reduction method, which are more synthetic than the co-precipitation method, have a higher purity, a much smaller particle size, and a narrower particle size distribution. Due to the fact that magnetite nanoparticles in sizes below 15 nm show the properties of paramagnetic cloud and also nanoparticles suitable for pharmaceutical applications should have a uniform distribution of particle size, nanoparticles synthesized by sediment-reduction method are recommended for drug delivery applications. Conclusion: Due to the fact that magnetite nanoparticles in sizes below 15 nm show superparamagnetic properties and also nanoparticles suitable for pharmaceutical applications should have a uniform distribution of particle size, nanoparticles synthesized by sedimentary-reduction method for drug delivery applications are recommended. Manuscript profile -
Open Access Article
76 - The effect of silver nanoparticles on the expression of exotoxin A and S genes in Pseudomonas aeruginosa
Muhammad Hemati Zahra Keshtmand Katayoun BorhaniBackground: Pseudomonas aeruginosa is one of the most important causes of nosocomial infections and exotoxin genes are important in the development of this infection.On the other hand, with the advancement of nanotechnology, today, the use of nanoparticles has been wide MoreBackground: Pseudomonas aeruginosa is one of the most important causes of nosocomial infections and exotoxin genes are important in the development of this infection.On the other hand, with the advancement of nanotechnology, today, the use of nanoparticles has been widely considered in the field of medicine and medicine, especially against microbes. The aim of the present study was to investigate the effect of silver nanoparticles (AgNPs) on the expression of Pseudomonas aeruginosa exotoxin A and S genes. Methods: In this experimental study, the minimum growth inhibition concentration of silver nanoparticles was determined by microdilution method. First, the lowest concentration of bacterial growth inhibitor is determined with silver nanoparticles. Then, at a concentration lower than the lowest growth rate, the expression of Pseudomonas aeruginosa exotoxin A and S genes was examined by Real time PCR. Data were analyzed using one-way ANOVA, Tukey test and P value less than 0.05. Findings: Silver nanoparticles with a concentration of 62.5 μg / ml had growth inhibitory effects on Pseudomonas aeruginosa. Also, at a concentration of 31.25, the expression of Pseudomonas aeruginosa exotoxin A and S genes was significantly reduced (p < 0.05). Conclusion: The results of this study show that lower concentrations (31.25 μg/ml) than growth inhibition concentrations (62.5μg/ml) can reduce the expression of Pseudomonas aeruginosa exotoxin A and S genes. Manuscript profile -
Open Access Article
77 - Effects of Zinc Oxide Nanoparticles on the Expression of Zinc Transporter 1-4 Genes in the Male rat hippocampal cell line
Maede Nilechi Akram Eidi Hamid Galehdari Mahnaz KesmatiIntroduction: Zinc plays an important role in the function of vital organs, especially the central nervous system. Zinc homeostasis disorder causes and progresses nervous system diseases such as Alzheimer, depression, learning disabilities and stress. Zinc homeostasis i MoreIntroduction: Zinc plays an important role in the function of vital organs, especially the central nervous system. Zinc homeostasis disorder causes and progresses nervous system diseases such as Alzheimer, depression, learning disabilities and stress. Zinc homeostasis in the body is mediated by ZnT and ZIP proteins. The aim of this study was to investigate the effect of zinc oxide nanoparticles on the expression of Znt1, Znt2, Znt3, and Znt4 genes in hippocampus cells as one of the tissues with high zinc density. Material and methods: First, the cell passage of the hippocampus cell line was performed, then the MTT assay test was performed for zinc oxide nanoparticles. In the next step, RNA extraction and CDNA synthesis were performed, and nanodrop spectrophotometer was used to ensure the purity of the RNA samples. Specific and appropriate primers of the desired genes were designed and synthesized. Then, changes in the expression of Znt1, Znt2, Znt3, and Znt4 genes were investigated using Real-Tim e RT-PCR. Results: Concentrations of 10 and 20 μg/mL of zinc oxide nanoparticles, significantly increased the expression of Znt1, Znt2, Znt3, and Znt4 genes in the hippocampus cell line of rat, while creating the lowest cytotoxicity. Conclusion: Zinc oxide nanoparticles can be investigated pharmacologically by increasing the expression of Znt1, Znt2, Znt3, and Znt4 genes in the treatment of zinc homeostasis disorders such as Alzheimer, depression, learning disabilities and stress. Manuscript profile -
Open Access Article
78 - Investigating the effect of nanoparticles with antioxidant properties on free radicals
Fatemeh Moradi Nadia Mahmoudi KhatirObjectives: The purpose of this study is to investigate the effect of nanoparticles with antioxidant properties on free radicals.Materials and methods: In order to achieve the goal of the research, the content and results of valid research articles related to the subjec MoreObjectives: The purpose of this study is to investigate the effect of nanoparticles with antioxidant properties on free radicals.Materials and methods: In order to achieve the goal of the research, the content and results of valid research articles related to the subject of the current research have been analyzed and reviewed.Findings: Examining and analyzing the results of studies that have dealt with the effect of nanoparticles with antioxidant properties on free radicals, showed that nanoparticles have recently received much attention due to their many applications and unique properties. Oxidative stress is the cause of many diseases in humans. Oxidative stress is a phenomenon in which the balance between antioxidant defense and oxidants in the cell is disrupted. Antioxidants prevent damage caused by oxidants. Although antioxidants have been known for a long time, research on improved natural or synthetic antioxidants is still a topic of interest due to their important practical applications. Antioxidants may suffer from low stability under oxygen and in biological systems can be degraded before reaching their target sites; Or they can have adverse health effects that limit their use. Sometimes, it is desirable to remove the antioxidants from the homogenous system to which they have been added, after they have taken effect. In this context, nanotechnology has opened new opportunities to exploit the unique and innovative properties of nanomaterials, possibly in combination with some common natural or synthetic compounds, with the aim of achieving pioneering "nano-antioxidants" with enhanced properties. Some nanomaterials, including organic metal oxides (e.g., melanin, lignin) (i.e., cerium oxide) or metal nanoparticles (e.g., gold), exhibit intrinsic redox activity, often by scavenging radicals and/or It is associated with superoxide dismutase-like and catalase.Conclusions: Inorganic nanoparticles have been successfully evaluated in terms of antioxidant properties. Recently, nano antioxidants have shown the ability to reduce oxidative stress with greater sensitivity, cellular antioxidant activity and minimal cytotoxic effects and targeted delivery. Manuscript profile -
Open Access Article
79 - Production of urease nanoparticles by desolvation method and comparison of some of their properties with free urease
Razieh Sadat Hosseini Seyyed Mohammad Hossein Razavian Mohammad Ali GhasemzadehObjective: Enzymes act as natural catalysts in biological reactions. But they have limitations such as lack of thermal stability, short life span and their lack of stability in the organic environment. Therefore, scientists have tried to improve the performance of enzym MoreObjective: Enzymes act as natural catalysts in biological reactions. But they have limitations such as lack of thermal stability, short life span and their lack of stability in the organic environment. Therefore, scientists have tried to improve the performance of enzymes in different ways, including nanotechnology. Therefore, the aim of the current study is to produce enzyme nanoparticles and evaluate some of their properties, which are being worked on due to the importance of urease in medicine, agriculture and industry.Materials and methods: In this research, increasing the stability of urease was done based on the production of enzyme nanoparticles by desolvation method. Synthesized nanoparticles were examined using Fourier Transform Infrared Spectroscopy (FTIR), Visible-Ultraviolet Spectroscopy (UV-Vis) and Scanning Electron Microscope (SEM). Also, the general and specific activities of free and nano enzymes were measured and compared at 37°C. In addition, free and nano enzymes were incubated for 10 minutes at temperatures between 30 and 70°C and then their activity was measured.Findings: The results of spectroscopy and scanning electron microscopy confirmed the formation of urease nanoparticles. Also, the activity determination results showed that with the formation of enzyme nanoparticles, despite the decrease in the total activity of the enzyme, its specific activity increased by 43.46%. The optimal activity temperature of total free urease was 50°C and urease nanoparticles was 60°C.After 10 minutes of incubation at 70°C, the free and nano enzymes retained 2% and 32% of their activity, respectively, which indicates an increase in thermal stability in this method.Conclusion: By preparing enzyme nanoparticles, it is possible to improve their activity and application in the industry. Manuscript profile -
Open Access Article
80 - In Vitro Release Studies of Enoxaparin in Nanoparticle form and Enterically Coated Tablets Containing Surfactants
Orkide Ghorban Dadras Morvarid Goharzadeh Mohammad Reza Avadi Zahra Ghassemi Asal Mirmohammad Sadeghi -
Open Access Article
81 - Black Tea Extract Mediated Green Synthesis of Copper Oxide Nanoparticles
Saeid Taghavi Fardood Ali Ramazani -
Open Access Article
82 - Preparation and Application of Fe3O4@SiO2@OSO3H Nanocomposite as a Green Catalyst for the Synthesis of Octahydroquinazolinones
Mohammad Ali Ghasemzadeh -
Open Access Article
83 - Sol-gel Synthesis and Characterization of Zinc Oxide Nanoparticles Using Black Tea Extract
Saeid Taghavi Fardood Ali Ramazani Sang Woo Joo -
Open Access Article
84 - Magnetic Properties of Cobalt Ferrite synthesized by Hydrothermal and Co-precipitation Methods: A Comparative Study
Saeed Abedini Khorrami Qazale Sadr Manuchehri -
Open Access Article
85 - Photocatalytic Mineralization of Methylene BlueAqueous Solutions by Ag/TiO2 Nano Composite
Leila Torkian Ehsan Amereh -
Open Access Article
86 - Preparation, Characterization and in vitro Release Studies of Enoxaparin in Nanoparticle form and Enterically Coated Tablets Containing Different Enhancers
Orkide Ghorban Dadras Morvarid Goharzadeh Mohammad Reza Avadi Assal Mir Mohammad Sadeghi -
Open Access Article
87 - Removing of Acid Red 1 Dye Pollutant from Contaminated Waters by UV/ TiO2/ H2O2 Process Using a Recirculating Tubular Reactor
Kambiz Seyyedi Samira Khoshbin Rasoul Piri -
Open Access Article
88 - Synthesis and Characterizations of Silica Nanoparticles by a New Sol-Gel Method
B. Gorji M.R. Allahgholi Ghasri R. Fazaeli N. Niksirat -
Open Access Article
89 - LaCo0.5Fe0.5O3 Nanoparticles as a Highly Efficient Adsorbent for Rapid Removal of Trypan Blue Dye From Aqueous Media
Mojtaba Ershadi Haman Tavakkoli Arezoo Ghaemi Afruz Azarkish -
Open Access Article
90 - Extraction and Determination of Heavy Metals Using Silver Coated Magnetic Nanoparticles and Flame Atomic Absorption Spectrometry
Ehsan Ghasemi Majid Ramezani -
Open Access Article
91 - Instantaneous Green Synthesis of Zerovalent Iron Nanoparticles by Thuja orientalis Extract and Investigation of Their Antibacterial Properties
Masumeh Noruzi Maryam Mousivand -
Open Access Article
92 - A Novel Method for the Synthesis of CaO Nanoparticle for the Decomposition of Sulfurous Pollutant
Meysam Sadeghi Mir Hassan Husseini -
Open Access Article
93 - Nickel Oxide/Carbon Nanotubes as Active Hybrid Material for Oxygen Evolution Reaction
Moein Mohseni Fereshteh Chekin Shahla Fathi -
Open Access Article
94 - Synthesis of Magnetic Iron-Oxide Nanofiber Composite using Electrospinning: An Absorbent for Removal of Nitrate from Aqueous Solution
Elham Ezzatzadeh Masoumeh Meskinfam Langroudi Farhad Jokari Sheshdeh -
Open Access Article
95 - Biosynthesis of Ag Nanoparticles at Ziziphus Jujuba Kernel Substrate using Tilia platyphyllos Extract: Catalytic Activity for Reduction of Organic Dyes
Bahar Khodadadi Mohammad Sabeti Omulbanin Norozi -
Open Access Article
96 - Novel Solvothermal Route for the Synthesis of Pure Ultrafine Anatase Nanoparticles
Aliakbar Tarlani Fatemeh Darkhosh -
Open Access Article
97 - Synthesis of Iron Yttrium Garnet Nanoparticles by Reverse Microemulsion Method
A.S. Emami Meibodi A. Ghorbani M. Adeli -
Open Access Article
98 - Synthesis and Study on Conductivity of Urethane Acrylate/Polyaniline/CuO Nanocomposites
Zeinab Hesari Behzad Shirkavand Hadavand -
Open Access Article
99 - Electrocatalytic Determination of Anti-Cancer Drug Imatinib, Using Ni Nanoparticle Modified Carbon Paste Electrode
Fatemeh Khakpoor Shahla Fathi -
Open Access Article
100 - Antibacterial Activity and Conductivity Properties of Nanocomposites based on Cellulose Acetate Nanofibers and Copper Nanoparticles
Mohsen Sargordan -Arani Elham Alsadat Hoseini Behrooz Mirza -
Open Access Article
101 - Electrochemical Determination of Dopamine Based on Magnetic Molecularly Imprinted Nanocomposite and Ionic Liquid Functionalized Carbon Paste Electrode in the Biological Samples
Farzaneh Shaker Mohammad Taghi Vardini Moosa Es’haghi Ebrahim GhorbaniKalhor -
Open Access Article
102 - Green bio-synthesis of Silver Nanoparticles Using Ziziphora tenuior L Water Extract
Sajjad Sedaghat Parvin Afshar -
Open Access Article
103 - An Efficient Synthesis of Benzylamino Coumarin Derivatives via Three-component Coupling of 4-hydroxycoumarin, Aromatic Aldehyde and Cyclic Secondary Amine Catalyzed by CuO Nanoparticles
Hossein Anaraki-Ardakani Behrooz Mirza Nader Mokhtarian -
Open Access Article
104 - Optimizing the Factors of Color Concentration, pH and the Amount of Nanoparticles in Removal of R198 Reactive Dye under UV Rays by Zinc Oxide Nanoparticles Extracted from Leaching Residue of Zinc Melting Factory
S. S. Gojrati M. Hajisafari M. M. Khosravirad -
Open Access Article
105 - Synthesis of new magnetic FeNi3 / SiO2 / PPA magnetic nanocatalysts in tetrahydrobenzo [a] xanthene-11-ones reaction under solvent-free conditions
Fatemeh Amarloo Rahelej Zhiani Alireza MotavalizadehkakhkyXanthenes and benzos Xanthenes are important heterocyclic systems and also have biological and pharmacological properties, such as antibacterial properties against the virus. In this study, FeNi3 / SiO2 / PPA nanoparticles were synthesized as solid acid support for the MoreXanthenes and benzos Xanthenes are important heterocyclic systems and also have biological and pharmacological properties, such as antibacterial properties against the virus. In this study, FeNi3 / SiO2 / PPA nanoparticles were synthesized as solid acid support for the synthesis of multicomponent reaction of tetrahydrobenzo[a]xanthene-11-ones in solvent-free conditions. The reaction of tetrahydrobenzo[a]xanthene-11-ones with 1gr of the catalyst was achieved in high yield products at 120 ° C without solvent and temperature. FeNi3 / SiO2 / PPA nanoparticles were confirmed by IR, TEM, SEM and EDX spectroscopy. The results showed that the catalyst has high activity, environmentally friendly, heterogeneous and can be easily recovered from the reaction mixture without losing its catalytic activity. Manuscript profile -
Open Access Article
106 - Synthesis of aerosol spray pyrolysis based on CZTS nanostructures for photovoltaic applications
mojtaba jamiatiAs the detrimental effects of the extraction, treatment and combustion of natural resources for energy production are clearly understood, the need for renewable energy becomes more favorable with economic competition. Solar power generation is a technically viable metho MoreAs the detrimental effects of the extraction, treatment and combustion of natural resources for energy production are clearly understood, the need for renewable energy becomes more favorable with economic competition. Solar power generation is a technically viable method, although the main drawback is the cost. Traditional silicon-based single-crystal photovoltaics are too expensive to compete with non-renewable energy, while alternative materials such as cadmium telluride and copper-indium-gallium-selenide contain expensive and unstable elements, while cadmium is a carcinogen. Za is known. Copper-zinc-tin sulfide (CZTS) is another alternative, although the technology is not yet advanced enough to enter the market. The present work is a study on the synthesis of CZTS nanostructures using aerosol spray pyrolysis based on CZTS nanostructures for photovoltaic applications in an inexpensive, environmentally friendly and industrially extensible manner. We dissolve a precursor solution with air-soluble copper, zinc, and tin compounds and pass the droplets through the furnace, where the precursors dissolve to form CZTS structures thermally. Using this method, we can produce thin films - by placing a substrate inside the furnace - and nanoparticles. Manuscript profile -
Open Access Article
107 - Fabrication of solar cells based on CZTSSe films with optimized chemical composition
mojtaba jamiatiThe main purpose of this study is to determine the relationships between the conditions of thin film synthesis and their characteristics. CZTSSe is synthesized through a two-step process, the various precursor accumulation instructions are studied in order to understand MoreThe main purpose of this study is to determine the relationships between the conditions of thin film synthesis and their characteristics. CZTSSe is synthesized through a two-step process, the various precursor accumulation instructions are studied in order to understand the sequence of reactions that lead from their deposition to the final layer of CZTSSe. The results of this study show that the final materials after firing at high temperature (575 ° C) and long time (25 minutes) are independent of the order of precursor deposition, but the intermediate stages of material formation are strongly influenced by the situations related to It is layers of copper and tin. This is done by synthesizing the CZTSSe layer on different substrates containing different levels of sodium: thus, during synthesis, sodium migrates from the substrate to the adsorbent. It is then used in a full solar cell to study the properties of photovoltaics. The results show that, as in the case of CIGS technology, sodium is beneficial to CZTSSe and increases open circuit voltage and cell efficiency. Molybdenum is the best back contact for CZTSSe-based solar cells. However, it has recently been suggested that MB is not stable in the user interface. Manuscript profile -
Open Access Article
108 - One-Pot Synthesis of Some Heterocyclic Organic Compounds by Magnetic Nanoparticles and its Application in Electrosynthesis of Silver Nanoparticles
Seyed Hashem AkhlaghiHeterocyclic compounds are a subset of cyclic compounds inwhich the ring-forming atoms are composed of two or more different typesof atoms. Heterocyclic chemistry is an important part of organic chemistrythat studies the properties, production methods, and reactions ofh MoreHeterocyclic compounds are a subset of cyclic compounds inwhich the ring-forming atoms are composed of two or more different typesof atoms. Heterocyclic chemistry is an important part of organic chemistrythat studies the properties, production methods, and reactions ofheterocyclic compounds. Among the heterocyclic compounds, pirans areone of the most important and valuable categories of heterocycles that havemany applications in medicine and therapy. In this project, we intend tosynthesize three of the Pirans derivatives under temperature and refluxconditions. The purpose of synthesizing these derivatives is theimmobilization of Ag nanoparticle, with uniform distribution, on thesurface of glassy carbon electrode such that the electrocatalytic current ofAg nanoparticle be constant. Manuscript profile -
Open Access Article
109 - Synthesis of a new and recyclable Ce2Sn2O7 metal nanocatalyst for the three-component and efficient reaction (biginlli) of the 3,4-dihydropyrimidine (2H)one model
Fatemeh Amarloo Rahelej Zhiani Alireza Motavalizadehkakhky Malihesadat HosseinyOne of the important and useful reactions is dihydropyrimidinones, which are used in various fields, including pharmaceutical and biological activities. The aim of this study is to synthesize Ce2Sn2O7 NPs, to investigate their performance on the three-component and effi MoreOne of the important and useful reactions is dihydropyrimidinones, which are used in various fields, including pharmaceutical and biological activities. The aim of this study is to synthesize Ce2Sn2O7 NPs, to investigate their performance on the three-component and efficient reaction of 3,4-dihydropyrimidine (2H) of it. Analysis of the structure and morphology of nanoparticles was done by EDX, TEM, SEM, FT-IR analysis and the effect of various parameters such as solvent, temperature, time, amount of catalyst and substrate on the process of reactions was investigated. The results showed that the reaction of 3,4-dihydropyrimidine (2H) in the presence of 5 mg Ce2Sn2O7 catalyst at a temperature of 70 ℃ for half an hour had 92% efficiency in solvent-free conditions and the best efficiency in the presence of ethanol solvent. Ce2Sn2O7 nanocatalyst was separated by a magnet. After 10 uses, their performance decreased slightly. The nanoparticles used have outstanding properties such as thermal stability, high mechanical properties, good active sites, and a very large contact surface, allowing them to be used in several reactions. Manuscript profile -
Open Access Article
110 - Green Synthesis of iron nanoparticles using peppermint extract and spectroscopic application in characterization and evaluation of its antioxidant properties
Seyed Hashem Akhlaghi ابوالفضل موسوی محمد مهرشادIn this study, leaf extracts were used to synthesize green nanoparticles of iron nanoparticles. Antioxidant properties of leaf extracts and extracts containing nano-iron particles were determined. Structural study of iron nanoparticles was performed using scanning elect MoreIn this study, leaf extracts were used to synthesize green nanoparticles of iron nanoparticles. Antioxidant properties of leaf extracts and extracts containing nano-iron particles were determined. Structural study of iron nanoparticles was performed using scanning electron microscopy. The formation of iron nanoparticles was confirmed by changing the color of the solution from yellow to brown. Antioxidant properties were observed in both leaf-containing extract and iron-containing extract of iron nanoparticles, and the addition of iron nanoparticles increased the antioxidant properties of peppermint. Structural analysis of iron nanoparticles using scanning electron microscopy showed that the shape of the particles is spherical and its average dimensions are 80-70 nm. Manuscript profile -
Open Access Article
111 - Synthesis 3a, 4-dihydronaphtho [2, 3-c] furan-1(3H)-one in the presence of CO2 and NiCo2O4 Nano catalyst
Shima Saberi Rahelej Zhiani Jamshid Mehrzad Alireza MotavalizadehkakhkyIn recent years, significant progress has been made in the use of non-toxic, recyclable, available and affordable CO2 for the production of organic composites. The goal of this research is to synthesize NiCo2O4 nanoparticles and investigate their performance on the thre MoreIn recent years, significant progress has been made in the use of non-toxic, recyclable, available and affordable CO2 for the production of organic composites. The goal of this research is to synthesize NiCo2O4 nanoparticles and investigate their performance on the three-component and efficient reaction of 3a, 4-dihydronaphtho [2, 3-c] furan-1(3H)-one. The structure and morphology of nanoparticles were analyzed by EDX, TEM, SEM, FT-IR and XRD analysis and the effect of various parameters such as solvent, temperature, time, amount of catalyst and substrate on the process of reactions was investigated. The results showed that the reaction of 3a,4-dihydronaphtho[2,3-c]furan-1(3H)-one, at a temperature of 60℃, with 8 mg of NiCo2O4 NPs catalyst and without solvent in the presence of electron-donating alkynes, had 94% efficiency. Catalysts can be recycled; NiCo2O4 Nano catalysts are separated from the solvent by a magnet. After 10 uses, their performance decreased slightly. The nanoparticles used have outstanding properties such as thermal stability, high mechanical properties, good active sites, and a very large contact surface, allowing them to be used in several reactions. Manuscript profile -
Open Access Article
112 - Investigation of Mechanical Property and Microstructure of Nanocomposite AZ31/SiC Fabricated by Friction Stir Process
ahmad haghani Sayed Hassan Nourbakhsh Mehdi Jahangiri -
Open Access Article
113 - Theoretical Predictions on Mechanical Properties of Functionally Graded Epoxy/Clay Nanocomposites
Mahdi Karami Khorramabadi -
Open Access Article
114 - Effect of CaCO3 Nanoparticles on Vibrational Damping Behavior and Static Mechanical Properties of Polypropylene Composite Plates: An Experimental Investigation
Mahdi Rahmani Armen Adamian Ahmad Hosseini-Sianaki -
Open Access Article
115 - Understanding the phytochemical constitution, antioxidant potential and spectral characteristics of aqueous extracts of the chosen leafy vegetables from south India
Sobha Kota Pradeep Dumpala Hariseetharam Prasad Dachepalli Anantha Ratna Kumari -
Open Access Article
116 - Phytoconstituents of Chromolaena odorata (L.) leaf extract for the synthesis of copper oxide/copper nanoparticles and evaluation of their biological potential in wound healing
Sobha Kota Pradeep Dumpala Radhika Sajja Ratnakumari Anantha -
Open Access Article
117 - The Effect of Ethanol Extraction of Aloe vera on Certain Biomarkers of Cardiovascular Disease in Mice Treated with Nanoparticles of Titanium Dioxide
Fereshteh Javan Masoomi Jila Talat Mehrabad Roghayeh Babri BonabInroduction & Objective: The effect of ethanol extraction of Aloe vera on certain biomarkers of cardiovascular disease in mice treated with titanium dioxide nanoparticles was studied.Material and Methods: Mice were received titanium dioxide nanoparticles with density of MoreInroduction & Objective: The effect of ethanol extraction of Aloe vera on certain biomarkers of cardiovascular disease in mice treated with titanium dioxide nanoparticles was studied.Material and Methods: Mice were received titanium dioxide nanoparticles with density of 100 milligrams per kg and ethanol extraction of aloe vera plant with density of 100, 200 and 300 milligrams per kg for 30 days. Plasma levels ofmalondialdehyde, rich sialic acid, troponin I and creatine kinase MB at the end of treatment was evaluated. The antioxidant activity of ethanol extraction in Aloe Vera using free radical DPPH and total phenol levels were considered.Results: The results showed that giving titanium dioxide nanoparticles through the stimulation of oxidative activity had a significant increase in plasma levels of malondialdehyde (MDA). Plasma levels of troponin I, creatine kinase MB and rich sialic acid also significantly increased. With increasing density of aloe vera, the total phenol and antioxidant activity of ethanol extraction increased. Giving the extraction significantly reduced the plasma levels of biomarkers of cardiovascular damage in mice treated with titanium dioxide nanoparticles.Conclusion:According to the results, ethanol extraction of aloe vera as an antioxidant compound is able to reduce the levels of cardiovascular damage in mice treated with titanium dioxide nanoparticles. Manuscript profile -
Open Access Article
118 - Tissue and Molecule Investigation and the Effect of Copper Nanoparticles Synerigm with Antibiotics on Colorectal Cancer Tumors Infected to Kelebsiella pneumonia
Sedighe Mehrabian Maria Valadbeaigi Shahla MohammadganjiInroduction & Objective: Colorectal is second common type of cancer in the universe. Genetic alteration scope in Colorectal is wide spread and inspections indicates infection to special kind of Kelebsiella pneumoniae bacteria which includes pks genes, can cause Colorect MoreInroduction & Objective: Colorectal is second common type of cancer in the universe. Genetic alteration scope in Colorectal is wide spread and inspections indicates infection to special kind of Kelebsiella pneumoniae bacteria which includes pks genes, can cause Colorectal cancer. A Kelebsiella bacterium is the reason for infectious diseases with challenging cures. Anti-biotic which are taken to cure (remedy) are of high side effects. This study is designed for the purpose of eliminating drug resistance and making use of low dose antibiotics in specific bacterial infections which makes change possible in intestine cell and incidence of cancer and may help cure or prevention.Material and Methods:In this method the investigation was carried out after supplying copper nanoparticles from Nano Pars Company with scale of 20 nanometer, purity degree of 99.9%, isolation and identification of Kelebsiella bacterium performed using common microbiologic and molecular methods. Kirby and Bauer method used in order to investigate bacterium resistance with different density of copper nanoparticles. The Synergistic effect or anti-biotic was investigated by impregnated anti-biotic discs with highest density of copper nanoparticles which not possess inhibitoringeffect. In this study strains including pks gene, were identified and isolated through PCR, then through different tests antimicrobial effects of copper nanoparticles and antibiotics upon mentioned strains was investigated. Antibiotics resistant to strains were identified. Mentioned bacteria sensitive to copper nanoparticles highest concentrations of copper nanoparticles that was not inhibited, concluded that using the lowest concentration of nanoparticles that demonstrated synergistic effects with antibiotic resistant.Results: The overall result can be used for treatment and prevention using nano biotic. In comparison with copper nanoparticles aforesaid bacteria were sensitive, highest density of copper nanoparticles which had no controlling effect, were selected.Conclusion:General result was that through using lowest density of nanoparticles which the impact of Synergistic with resistant anti-biotic indicated, nano-biotic can be used for curing and prevention. Manuscript profile -
Open Access Article
119 - Effect Of Lead Chloride on Embryonic Stages and Kidney Differentiation in Pterophyllum Scalare
Sara Shekari mehrengiz sadooghi Homayon HosseinzadehIntroduction and Objective: The amount of heavy metals in the environment has increased with human industrial interference and cause damage to the environment provides.Free of heavy metals are found in combination with other elements in the environment , and mineral wat MoreIntroduction and Objective: The amount of heavy metals in the environment has increased with human industrial interference and cause damage to the environment provides.Free of heavy metals are found in combination with other elements in the environment , and mineral waters. Effect of lead chloride on fish embryos that named (Pterophyllum scalar) is the aim of this studyTherefore, 5 pairs of ornamental fish of a species to determine the toxicity of lead chloride in the process of embryonic development (early life) before the eggs were extractedMaterials and Methods: In the first study to determine the acute toxicity LC50 concentration of the desired material (lead chloride) 5 concentration of 3 μg/L, 5 μg/L, 10 μg/L and 20 μg/L and control was performed in three successive iterations .Each test was repeated for 3 days and counting the number of dead embryos (white) Acute toxicity of lead chloride at doses less than μg/L (5 μg/L ≤ n) was determinedIn the second phase of research to examine the changes desired effect of causing toxicity on fetal developmental stages of Angel fish were. Stages of the test is less than the LC50 concentration of less than 4 were considered g/Lμ5. The concentrations of 5/0, 5/1, 3 and 5/4 g / Lμ and controls for comparisonSome of these samples at the same moment sampling survey was study with photo stereo microscope.Results:The results showed that lead chloride in the initial review abnormally apparent like the tilt, loss of vision or the lack of effect on growth delay. Histological studies of tissues prepared for light microscopy study also showed that lead chloride on growth of embryonic kidney (Prenefroses) did not interfere Manuscript profile -
Open Access Article
120 - Investigation about the Mutagenic and Carcinogenic Effects Of Bismuth Nanoparticles with Using Salmonella typhimurium TA100 and Rat Liver Microsomes
Bahar Shams Kilani Sedighe Mehrabian Farzaneh HosseiniIntroduction and Objective:The usage of nanoparticles is growing in various fields due to their low cost, high efficiency and antimicrobial properties. Therefore, their potential hazards should also be considered and used at concentrations that have not mutagenic or car MoreIntroduction and Objective:The usage of nanoparticles is growing in various fields due to their low cost, high efficiency and antimicrobial properties. Therefore, their potential hazards should also be considered and used at concentrations that have not mutagenic or carcinogenic effects. This study aimed to assess the mutagenic and carcinogenic effects of Bismuth nanoparticles with a size of 56nm, and the concentrations of 156.25,78.1, 39.1 ppm .Materials and Methods: In this study, we utilize the Ames test using Salmonella typhimurium TA100Firstly, the purity of the strains was confirmed in terms of purity of mutagenic properties. Then the different concentration of Bismuth nanoparticles was separately added to minimal glucose agar medium containing TA100. Subsequently, they were compared against the positive control ( samples containing mutated bacteria and sodium azide ) and negative control ( containing mutated bacteria and distilled water ). In the next phase of this research the rat liver micrsomes was separately added to the minimal glucose agar medium containing the suspected carcinogenic Bismuth nanoparticles , and negative and positive controls and all back colonies were counted.Results:The number of revertant colonies the treated plates with S9 is decreased and it means mutagenic and carcinogenic effect of Bismuth nanoparticles with S9 is decreased.Conclusion:The results of the present study shows that the Bismuth nanoparticles at concentrations examined had no mutagenic and carcinogenic effect Manuscript profile -
Open Access Article
121 - Effect Ofsilver nanoparticle injection on body weight, liver index and spleen index in rat
Hossein Hamzehei Hamed Alizadeh Nader Hajizadeh Mohammad Taghi MoazedInroduction and Objective:Silver nanoparticles may be toxic. The mechanism of toxicity is not known. Great concern for the health of humans in nature has created. The changes in body weight, liver index and spleen index can be effective in identifying harmful factor in MoreInroduction and Objective:Silver nanoparticles may be toxic. The mechanism of toxicity is not known. Great concern for the health of humans in nature has created. The changes in body weight, liver index and spleen index can be effective in identifying harmful factor in the body. This study was performed to examine the effects of silver nanoparticles on body weight and liver and spleen index in rats.Materials and Methods:21 adult female rats were randomly divided into 7 groups. The mice were weighed. Group 1 was sham. Control group 2 and group 3 to 7 experimental groups were treated respectively with 5, 10, 20, 40 and 80 ppm of silver nanoparticles. Mice treated for 10 days. On the eleventh day the rats were killed by diethyl ether anesthesia. The mice were weighed and then dissected; the liver and spleen were removed. Liver and spleen were weighed in order to calculate their index.Results:The results showed no significant change in body weight of mice, spleen weight, liver weight and liver index and spleen index.Conclusion:Intraperitoneal injection of silver nanoparticles does not affect the index in rat liver and spleen. Manuscript profile -
Open Access Article
122 - Effect Of Intraperitoneally Injection Of Molybdenum Nano Particles on Plasma Levels Of Liver Enzymes in Adult Rat
Azam Heidari Mehran Mohseni Karim DadashiInroduction and Objective: With the industrialization of the nanotechnology, application of nanoparticles will increase in modern technology and many people exposure to this particles. So, study of effect of different concentration of nanoparticles on health impacts is MoreInroduction and Objective: With the industrialization of the nanotechnology, application of nanoparticles will increase in modern technology and many people exposure to this particles. So, study of effect of different concentration of nanoparticles on health impacts is necessary. The main aim of this study was to assess acute toxicity of Mo nanoparticles on serum biochemical function of liver in rat.Material and Methods: In this experimental study, 24 male rats were randomly divided into four groups of six. The first was control group and tree groups were treatment. Animals in the first group (control) received 1 ml distilled water and treatment groups received intraperitoneally injection of Molybdenum nano particles (5, 10, 15 mg/Kg/BW) daily during 28 days. After the last dose, blood samples were taken from all groups and levels of LDH, ALT, AST and ALP were measured and groups were compared together.Results:The results showed that both doses of 5 and 10 mg/Kg/BW decreased significantly AST level compared to control group (pConclusion:The result of this study showed that Molybdenum nanoparticles at low concentrations because of its antagonistic effects on copper metabolism are not acute toxic. Manuscript profile -
Open Access Article
123 - Effect Of Injection Of Silver Nanoparticles on Plasma Levels Of Liver Enzymes in Rat
Hossein Hamzehei Hamed Alizadeh Mohsen Ajalli Farid DolatshahiBackground and Purpose:Possible toxic effects of silver nanoparticles on humans are a major concern that encountered the use of this nanoparticles with many challenges. Today, silver nanoparticles, mostly because of their antimicrobial effects have been discussed. But t MoreBackground and Purpose:Possible toxic effects of silver nanoparticles on humans are a major concern that encountered the use of this nanoparticles with many challenges. Today, silver nanoparticles, mostly because of their antimicrobial effects have been discussed. But the possibility of their side effects, make its use doubtful. Among the main effects of silver nanoparticles that can have in the body, effects on the liver and its metabolism which has not been mostly considered. The aim of this study was to examine the injected effects of silver nanoparticles on plasma levels of liver enzymes such as AST, ALT and ALP that could open new horizons in relation to current challenges.Methods:In this study, 21 female Wistar rats were used. The rats were randomly divided into 7 groups. The first group was sham group, the second group was control group, the third to seventh groups were tested, were treated with 5, 10, 20, 40 and 80 ppm of silver nanoparticles, respectively. Treatment of mice continued for 10 days. Then the rats were killed with ether anesthesia. Blood samples were taken from the hearts of animals. Plasma levels of liver enzymes (AST, ALT and ALP) were tested by diagnostic kit of Pars Azmoon company using indirect spectrophotometric method.Results:The results showed that there are no significant differences between the control and sham groups. But overall, silver nanoparticles at high concentrations cause significant changes in levels of enzymes.Conclusions:The results of this study showed that silver nanoparticles at high concentrations can have deleterious effects on the liver and should be used with caution in high concentrations Manuscript profile -
Open Access Article
124 - In vivo murine breast cancer targeting by magnetic iron nanoparticles involved L. GG cytoplasmic fraction
Salar Mokriyani Naser Harzandi Amir Tukmehchi Leila JabalameliInroduction & Objective: The use of chemical anti-cancer drugs frequently create serious side effects. However, probiotics are natural and treat different kinds of cancer without undesired effects. In this study, a nano delivery system was planned to transport the L MoreInroduction & Objective: The use of chemical anti-cancer drugs frequently create serious side effects. However, probiotics are natural and treat different kinds of cancer without undesired effects. In this study, a nano delivery system was planned to transport the Lactobacillus rhamnosus GG (L. GG) cytoplasmic fraction (Cf) to cancerous tissue in the mouse model. Material and Methods: Magnetic iron nanoparticles (MINPs) were synthesized and loaded with L. GG-Cf (0, 0.312, 0.625, 1.25, 2.5 mg/ml) and administrated for three weeks to treat experimentally induced murine breast cancer in a constant magnetic field. At the end of the trial, the treating efficacy of this complex molecule was evaluated via western blotting and qPCR. Results: Results showed MINPS can deliver and accumulate the L. GG-Cf in cancer tissue, also the size and volume of the tumors were reduced. Additionally, in cancer tissues of treated mice with 2.5 mg/ml of Cf-MINPs significant induced apoptosis was seen compared to untreated (control), and our data proved that this induction may be due to the caspase-3 pathway. Conclusion: In conclusion, L. GG-Cf could treat the murine breast cancer and MINPs are a suitable candidate for drug delivery because of their safety, uniformity, and magnetic properties. Manuscript profile -
Open Access Article
125 - Immunogenical Evalution of PLGA Nanoparticles Contain Klebsiella pneumoniae K2O1 Detoxified Lipopolysaccharide Antigen in Pulmonary Infection Model of BALB/C Mice
Parivash Ghaderinia reza shapoury Kobra Rostamizadeh Alireza Khodavandi Mehdi MahdaviInroduction & Objective: Klebsiella pneumoniae is the most common pathogenic bacterium in the genus Klebsiella. Every year, about 2 million children under the age of 5 die from pneumonia. Due to the acquired and inherent resistance of Klebsiella pneumoniae isolated agai MoreInroduction & Objective: Klebsiella pneumoniae is the most common pathogenic bacterium in the genus Klebsiella. Every year, about 2 million children under the age of 5 die from pneumonia. Due to the acquired and inherent resistance of Klebsiella pneumoniae isolated against a wide range of antibiotics, its control and treatment appear to be critical. The aim of the present study was to use Polylactic-co-glycolic acid (PLGA) nanoparticles in vaccine design the LPS antigen of Klebsiella pneumoniae K2O1. So far, no work has been done on this strain of bacteria to make the PLGA-LPS vaccine. In the study, the results obtained from the tested mice showed that the mice were vaccinated. Immunized and titrated antibodies of IgM 315 cfu / well, IgG 321 cfu / well, and SIgA 365 cfu / well, elevated and in mice with invasion factor in patients and spleen and lung tissues, number of people compared to unvaccinated mice Is. Has gone to zero.Material and Method: In the present study, the LPS antigen was extracted from Klebsiella pneumoniae K2O1 by centrifugation and detoxified with phenol.Then the LPS antigen was conjugated to polylactic-co-glycolic acid nanoparticles. Infrared spectroscopy (FT-IR) and atomic force microscopy (AFM) were used to confirm conjugation with nanoparticles. To evaluate endotoxin of the vaccine designed Tested by Limolus amoebocyte lysate assay (LAL test). success of antigen and nanoparticles conjugates based on the size and charge of antigen-containing nanoparticles was confirmed by the zetasizer.Results: FT-IR results the shape of the corresponding peaks confirmed the presence of antigen-functional groups in the nanoparticle structure and the formation of bonds. AFM microscopic images of nanoparticles containing LPS antigen and nanoparticles before conjugation showed an increase in the binding sites of nanoparticles after conjugated. Change from initial sharpness to puffiness after conjugation proved the success of antigen transport by nanoparticles. Fever was not observed in rabbits and mortality was confirmed in BALB/C mice.Conclusion: The results showed that the vaccine was effective in immunogenicity and therefore suggested as a candidate for an effective vaccine against Klebsiella pneumoniae. Manuscript profile -
Open Access Article
126 - Green synthesis of zinc nanoparticles and investigation of changes in some biochemical parameters of blood and its effect on wound healing caused by burns in laboratory Wistar male rats
Zahra Sinaee pour Fard Nooshin Naghsh Nasrin Yazdanpanahi Gholam Reza AmiriIntroduction & Objective: Currently, zinc and its compounds are used as a suitable material for the treatment of infection in burns, open wounds and chronic wounds. This investigation, was designed and carried out with the aim the local effect of green zinc nanopart MoreIntroduction & Objective: Currently, zinc and its compounds are used as a suitable material for the treatment of infection in burns, open wounds and chronic wounds. This investigation, was designed and carried out with the aim the local effect of green zinc nanoparticles on blood biochemical parameters and skin tissue repair during wound healing in laboratory rat. Materials and methods: In this experimental study, 42 male Wistar rats were divided into 7 groups of 6. Then, by creating a 2 cm burn on the back of the rats, treatment was immediately performed with zinc nanoparticles ointment (1%, 4%, 16%) and zinc oxide ointment and pure Vaseline for 21 days. After sampling from the percentage of wound repair in the skin of rats was calculated. Similarly, blood sampling was done from the hearts of rats and serum was used to check biochemical parameters. Results: The percentage of wound healing in the 4% ointment group and zinc oxide ointment was significantly higher than the control group. In addition, all the concentrations of ointment were safe in terms of their effect on liver enzymes. Conclution: The results of investigation showed that the ointment of 4% zinc nanoparticles was the best treatment group, which accelerated the repair of skin wounds. Based on the results of the present experimental study, probably the ointment produced by the identified green nanoparticles could be suggested as a strong repair agent in skin lesions naturally. Manuscript profile -
Open Access Article
127 - The Antibiotic Resistance Pattern of Methicillin Resistant Staphylococcus aureus and Antibacterial Effect of Silver and Copper Nanoparticles on that In vitro and Animal model
Saba Hashemi Rasoul ShokriBackground & aim: Considering the high resistance to drug in methicillin-resistant Staphylococcus aureus, this study was performed to investigate the effects of silver and copper nanoparticles and their combined effect on the methicillin-resistant Staphylococcus aur MoreBackground & aim: Considering the high resistance to drug in methicillin-resistant Staphylococcus aureus, this study was performed to investigate the effects of silver and copper nanoparticles and their combined effect on the methicillin-resistant Staphylococcus aureus in vitro and animal models.Materials & Methods: To determine the most effective antibiotics, disk diffusion method was performed. The microdilution method is used for determination of Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of copper and silver nanoparticles and their combination . Then, to examine the effect of nanoparticles and the antibiotic, experiments were performed in the animal models. For this purpose, after intraperitoneal inoculation of bacterial suspension, MBC concertrations obtained from microdilution method were injected to the mice and after the cultivation of spleen, colony count was performed.Results: The most effective antibiotic on bacteria was vancomycin. The MIC of silver and copper nanoparticles, vancomycin, silver and copper nanoparticles, silver nanoparticles-vancomycin and copper nanoparticles- vancomycin were 1250 ppm, 2500 ppm, 78/12, 625 ppm, 35 ppm and 250 ppm respectively. In animal model, the lowest number of colonies is related to silver nanoparticles and then silver nanoparticles-vancomycin.Conclusion: The results show that antimicrobial effect of silver nanoparticles is more than vancomycin and copper nanoparticles. Also the combination of silver and copper nanoparticles increases their antimicrobial strength and the combination of silver and vancomycin after complementary experiments, can be a option for the treatment of infections caused by these bacteria. Manuscript profile -
Open Access Article
128 - The Effect of Magnetic Nanoparticles on Dynamic Behavior of Aorta Artery with Atherosclerosis Under the Action of Pulsating Blood Velocity
M.R Motaghedifar A Fakhar H Tabatabaei M Mazochi -
Open Access Article
129 - Entomotoxic effect of nanoparticles of Zn-TiO2-Ag against oleander aphid, Aphis nerii
Mohammad Rouhani Mohammad Amin SamihIn recent years noble metal nanoparticles have been the subjects of focused researches due to their unique electronic, mechanical and chemical properties that are significantly different from those of bulk materials. Improvements in nanotechnology in the past decayed ha MoreIn recent years noble metal nanoparticles have been the subjects of focused researches due to their unique electronic, mechanical and chemical properties that are significantly different from those of bulk materials. Improvements in nanotechnology in the past decayed has created various opportunities for evaluation of biologic effects such as insecticidal effects of nanoparticles. In this research, nanoparticles of 70%Zn-28%TiO2-2%Ag and 70%Zn-29%TiO2-1%Ag were synthesized through a solvothermal method and the insecticidal activity of Zn-TiO2-Ag nanoparticles and imidacloprid against the A.nerii was investigated. Results of Scanning Electron Microscopy (SEM) showed that these nanoparticles are approximately spherical with the diameter varying 48 and 49 nm, respectively. In this experiment, the LC50 value for 70%Zn-28%TiO2-2%Ag, 70%Zn-29%TiO2-1%Agand imidacloprid were calculated to be 476.74, 528.51 and 0.66, respectively. These results demonstrated that these nanoparticles have insecticidal effect on A. nerii. Additionally, the study showed that imidacloprid at 1 µl/ml and nanoparticles at 700 mg/ml had the highest insect mortality effect. Manuscript profile -
Open Access Article
130 - Synthesis and Optimization of Human Serum Albumin Nanoparticles for Drug Delivery Application
rabi mehravar Mohsen JahanshahiAbstract In recent years, the application of protein nanoparticles has become of more and more interest to the pharmaceutical industry. In this study,Human Serum Albumin (HSA) was used for the synthesis of nanoparticles by desolvation method for application in drug deli MoreAbstract In recent years, the application of protein nanoparticles has become of more and more interest to the pharmaceutical industry. In this study,Human Serum Albumin (HSA) was used for the synthesis of nanoparticles by desolvation method for application in drug delivery system because of biodegradablity, owing to the high capacity of drug loading and nontoxiticty. Moreover, the effects of different parameters i.e. pH, HSA concentration, agitation speed, glutaraldehyde concentration, organic solvent adding rate, the ratio of organic solvent/HSA solution were examined in this research and Taguchi method with L16 orthogonal array was implemented to optimize experimental conditions. The best parameters for nanobioparticles production were obtained at pH=9, HSA concentration: 75 mg.ml-1 , ethanol adding rate: 1.5 ml.min-1 and the ratio of organic solvent/HSA solution: 4. Under these conditions, the software predicted the 46.625 nm for HSA nanoparticle size, which, in experiment 53 nm, was achieved for the nanoparticles. With respect to our study, the synthesis of human serum albumin nanoparticles was carried out for the first time and to the best of our knowledge, no reference has been found in the literature about using Taguchi method for optimization of HSA nanoparticles up to now. Manuscript profile -
Open Access Article
131 - Investigation of the effect of silica nanoparticles with the pathogenic fungus Beauveria bassiana on the greenhouse whitefly, Trialeurodes vaporariorum Westwood
SEYYED KAZEM Vahedi A. Hoseinzadeh Akbar Ghassemi-KahrizehIntroduction: Greenhouse whitefly, as an economic pest, has a wide and ubiquitous host range and causes great damage to many crops, including greenhouse plants. Due to the morphological characteristics and potential of resistance to chemical toxins, it is necessary to f MoreIntroduction: Greenhouse whitefly, as an economic pest, has a wide and ubiquitous host range and causes great damage to many crops, including greenhouse plants. Due to the morphological characteristics and potential of resistance to chemical toxins, it is necessary to find suitable and compatible compounds for integrated control of this pest by increasing the effect and minimizing the adverse effect on the pathogenic fungus Beauveria bassiana.Methods: In this study, the effect of pathogenic fungus Beauveria bassiana alone and in combination with silica nanoparticles against second instar seeds and nymphs of Trialeurodes vaporariorum Westwood and germination power of pathogenic fungi using probit analysis, one-way analysis of variance and ANOVA SPSS software was examined.Results: LC50 values obtained from probit degradation as a result of the effect of different concentrations of silica nanoparticles and Beauveria bassiana against eggs after 7 days and against second instar nymph after 72 hours (643.97 mg / L and 170399 conidia/ ml) and (602.952 mg / L and 78379 conidia/ ml) were obtained, respectively.Results: According to the results of the present study, silica nanoparticles alone have higher toxicity than other treatments and in combination with B. bassiana can be used in integrated control of the important greenhouse whitefly pest. The most important advantage of using these compounds is their compatibility with the environment and the lack of resistance to insects against them. Manuscript profile -
Open Access Article
132 - Toxicity and insecticidal effect of titanium oxide nanoparticles on American cockroach
Ali Noori Shahzad ShiraniBackground and purpose: American cockroach is one of the important household insects, which transmits many types of pathogens to the environment. On the other hand, the methods used to control it today are somewhat ineffective and have caused resistance in these insects MoreBackground and purpose: American cockroach is one of the important household insects, which transmits many types of pathogens to the environment. On the other hand, the methods used to control it today are somewhat ineffective and have caused resistance in these insects. Materials and methods: 311 adult American cockroaches were purchased from Tehran Health College. Titanium oxide nanoparticles were also purchased from Neutrino company, Tehran. Different concentrations of nanoparticles were prepared for oral and contact treatments of American cockroaches. American cockroaches were treated by contact and oral method with different concentrations of titanium oxide nanoparticles with three repetitions. The average percentage of insect mortality in different groups was compared by one-way analysis of variance and Duncan's test. Also, the average percentage of insect mortality on different days in each group was compared by analysis of variance with repeated observations. Results: The oral treatment of American cockroaches was more effective than the contact treatment in concentrations of 15 and 21% in all days, but the contact treatment was more effective than the oral treatment in all days except the seventh day in a concentration of 25%. In general, oral treatment was more effective than contact treatment. With increasing dose and passage of time, the mortality percentage of American cockroaches increased significantly due to contact and oral treatment with titanium dioxide nanoparticles. Conclusion: The use of different nanoparticles, including titanium dioxide nanoparticles, can create a significant effect in controlling the American cockroach as a new method along with the previous methods. Manuscript profile -
Open Access Article
133 - Biosynthesis of Magnesium Oxide Nanoparticles by E. hirae isolated from traditional yogurt in Rafsanjan, Iran.
Ozra Hosseini-Naveha Ashraf Kariminik Shahla Soltani-Nezhad Enayatollah SheikhhosseiniThere is a lot of evidence about the beneficial biological effects of probiotics in food and dairy products. Antimicrobial properties, ability to produce biosurfactant and biosynthesis of nanoparticles are among the significant effects of these organisms. The aim of thi MoreThere is a lot of evidence about the beneficial biological effects of probiotics in food and dairy products. Antimicrobial properties, ability to produce biosurfactant and biosynthesis of nanoparticles are among the significant effects of these organisms. The aim of this research is the biosynthesis of magnesium oxide nanoparticles by Enterococcus hirai from traditional yogurt. MRS agar culture medium was used to isolate probiotics. Biosurfactant-producing isolates were examined in terms of hemolysis, crude Oil Spreading Assay, Drop Collapse Assay and emulsification index, the best isolate for the production of magnesium oxide nanoparticles, size, antioxidant activity, FTIR and antibacterial effects were evaluated and identified by PCR. 9 isolates had probiotic properties, isolate L11 was selected with higher biosurfactant production ability. The antibacterial property of the produced biosurfactant was shown against Gram-positive and Gram-negative bacteria. This strain was also able to produce magnesium oxide nanoparticles. The formed nanoparticles with a size of 135 nm showed significant antibacterial and antioxidant effects. The best strain was introduced as Enterococcus hirai. According to the findings, it seems that this probiotic strain producing biosurfactant and magnesium oxide nanoparticles can be used in food and industrial industries. Manuscript profile -
Open Access Article
134 - Investigation on the effect of FMBO nanoparticles on the structure and morphology of composite nanofibers PVDF/FMBO
parisa aliahmadipoor rasool jamshidi gohari Dadkhoda GhazanfariRecent research has shown that long, porous nanofibers are one of the safest nanomaterials due to their controllable production, high specific surface area and continuous matrix structure. In this study, following the previous study of the authors, Structural phases of MoreRecent research has shown that long, porous nanofibers are one of the safest nanomaterials due to their controllable production, high specific surface area and continuous matrix structure. In this study, following the previous study of the authors, Structural phases of nanofibers were synthesized from combination of polyvinylidene fluoride (PVDF) and iron/manganese binary oxide nanoparticles (FMBO) were evaluated. Mineral adsorbents were integrated into polymer matrix in the range of zero to 0.5. The properties of nanofibers according to the structure and surface characteristics using SEM and TEM were determined. In this study, structural phases of PVDF and PVDF/FMBO electrospinning nanofibers were distinguished by examining the FTIR vibration bands and analyzing the XRD characteristics due to the different reports on the analysis of α, β and γ phases according to the measured data. The results of FTIR, specifically by examining bands 762 and 612, 1275 and 1234 cm-1 and its compliance with XRD results and reviewing published research the α, β and γ phases were distinguished, respectively. Manuscript profile -
Open Access Article
135 - Determination of total antioxidant capacity with nanoparticles
Safieh MomeniTotal antioxidant capacity (TAC) as the cumulative activity of antioxidants in a sample is an important parameter in the analysis of biological or food matrices. Therefore, it is very important to evaluate the total antioxidant capacity of the substances in the diet and MoreTotal antioxidant capacity (TAC) as the cumulative activity of antioxidants in a sample is an important parameter in the analysis of biological or food matrices. Therefore, it is very important to evaluate the total antioxidant capacity of the substances in the diet and biological fluids. Based on this, many methods check their antioxidant capacity and effectiveness in different conditions. However, there is often no strong correlation between the capacities measured on the same materials with different methods, which is due to the variety of active materials, mechanisms and different characteristics such as different types of antioxidants, the presence of other interfering substances in the sample, lack of participation of antioxidants are used in the method reaction. In recent years, different analytical methods based on nanoparticles have been developed to determine the antioxidant capacity of foods and plant materials.In these measurement methods, nanoparticles such as gold, silver, iron oxide, manganese oxide, quantum dots and cerium oxide have been used. In this article, we review some of the researches conducted in the field of total antioxidant capacity measurement. Manuscript profile -
Open Access Article
136 - Colorimetric determination of glucose using Fe3O4/CeO2/C-dots magnetic nanocomposite
Yasaman Ezhdehakosh Abolverdi Fatemeh HonarasaIn the present study, determination of glucose was performed based on peroxidase-like activity of Fe3O4/CeO2/C-dot nanocomposite. In this way, a cascade reaction was used. At first, glucose in the presence of glucose oxidase enzyme reacts with oxygen to produce gluconic MoreIn the present study, determination of glucose was performed based on peroxidase-like activity of Fe3O4/CeO2/C-dot nanocomposite. In this way, a cascade reaction was used. At first, glucose in the presence of glucose oxidase enzyme reacts with oxygen to produce gluconic acid and H2O2. Then, in the second step, H2O2 in the presence of Fe3O4/CeO2/C-dot converts TMB (3,3’,5,5’- tetramethylbenzidine) to oxTMB which causes the solution to turn blue. Intensity of blue color depends on glucose concentration, nanocomposite amount, TMB concentration and solution pH. Absorbance of solution at 650 nm was increased by increasing the glucose concentration. So, linear range between glucose concentration and intensity of absorbance at 650 nm was observed. Experimental detection limit for glucose detection was obtained as 1×10-5 M. Also, the sensing system shows high selectivity towards the detection of glucose in the presence of fructose, lactose and maltose as interferences. Manuscript profile -
Open Access Article
137 - Synthesis of nickel oxide nanoparticles by using of Ferula plant extract and exploring of its photocatalytic activity in degradation of bromothymol blue
Moones Honarmand Ahmad Aryafar Majid MahjooreIn this report, for the first time, the synthesis of nickel oxide nanoparticles (NiO) was carried out by the extract of Ferula plant. No chemical reducing agents, toxic stabilizers, or dangerous solvents were used for the synthesis of nickel oxide nanoparticles, and all MoreIn this report, for the first time, the synthesis of nickel oxide nanoparticles (NiO) was carried out by the extract of Ferula plant. No chemical reducing agents, toxic stabilizers, or dangerous solvents were used for the synthesis of nickel oxide nanoparticles, and all fabrication steps were carried out in a green and mild conditions. X-ray diffraction analysis (XRD) and field emission scanning electron microscope (FE-SEM) were employed to determine the phase type and morphology of biosynthesized nickel oxide nanoparticles. After characterization, in order to take a step to protect the environment, biosynthesized nickel oxide nanoparticles were utilized as an effective photocatalyst for the degradation of bromothymol blue as an organic dye. In this manner, a UV lamp was used to activate the nickel oxide photocatalyst. The degradation percentage of bromothymol blue dye reached %77.08 within 3 hours. To evaluate the feasibility of using nickel oxide nanophotocatalyst in industry, the degradation of bromothymol blue was performed on real wastewater and successful results were obtained. Manuscript profile -
Open Access Article
138 - The effect of selenium nanoparticles on DNA oxidative damage, oxidative stress parameters and ovarian tissue structure in an animal model of polycystic ovary syndrome
Mohammad Amin Edalatmanesh Samaneh RafieiPolycystic ovary syndrome (PCOS) is associated with hormonal-metabolic disorders, oxidative stress and ovulation disorders. The present study evaluated the effect of selenium nanoparticles (SeNPs) on the activity of antioxidant enzymes and ovarian tissue structure and o MorePolycystic ovary syndrome (PCOS) is associated with hormonal-metabolic disorders, oxidative stress and ovulation disorders. The present study evaluated the effect of selenium nanoparticles (SeNPs) on the activity of antioxidant enzymes and ovarian tissue structure and oxidative DNA damage in the polycystic ovary syndrome (PCOS) model. 32 female Wistar rats were divided into 4 control groups, PCOS, PCOS+SeNPs0.1 and PCOS+SeNPs0.1. Polycystic ovary syndrome was induced by a single intramuscular injection of estradiol valerate (4 mg/kg) and SeNPs with doses of 0.1 and 0.2 mg/kg were administered orally for 14 days. At the end, the tissue level of superoxide dismutase (SOD), catalase (CAT) enzymes, content of malondialdehyde (MDA) and 8-hydroxydeoxyguanosine (8-OHdG) in the ovarian tissue was measured by ELISA technique and the ovarian tissue structure was examined histopathologically. A significant decrease in the number of follicular cysts, 8-OHdG and MDA levels along with a significant increase in tissue levels of SOD and CAT enzymes were seen in the SeNPs treatment groups compared to the PCOS group. In fact, SeNPs with antioxidant function improved ovarian tissue structure in polycystic ovary syndrome model. Manuscript profile -
Open Access Article
139 - Structure, morphology, and luminescence properties of Electrosynthesized ZnS: Cu, Cl Nanoparticles
nafiseh hajiabdolah Parizad Rezaee Mohammad Yousefi -
Open Access Article
140 - One-pot synthesis of triazolo[1,2-a]indazole-triones catalyzed by a novel magnetically and reusable green catalyst of Preyssler
Maryam Akbari Ali Javid Farid Moeinpour -
Open Access Article
141 - Efficient CeO2 nanoparticles catalysed for Synthesis of heterocyclic Bis(Indolyl) methanes under mild conditions
Vishvanath D. Patil Amruta Salve Vaishnav D. Gharat Nilesh Gawand -
Open Access Article
142 - Manganese salophen complex supported on magnetic nanoparticles as an efficient, selective and recyclable catalyst for epoxidation of alkenes
Mozhgan Afshari Maryam Gorjizadeh Simin Nazari -
Open Access Article
143 - Magnetic nanoparticles containing Manganese salophen complex as an selective and recyclable catalyst for epoxidation of alkenes
Mozhgan Afshari Maryam Gorjizadeh Simin Nazari -
Open Access Article
144 - Synthesis of 1-amidoalkyl-2-naphthol derivatives using Supported sulfonic acid on silica coated cobalt ferrite nanoparticles as a catalyst under solvent free conditions
Mozhgan Afshari Maryam Gorjizadeh -
Open Access Article
145 - Making epoxy/copper ferrite and copper hydroxide composite using nanoparticles synthesized by hydrothermal and ultrasonic method and checking the thermal properties of composites
Elaf ayad Kamel Aljahlavi Mohammad Moarrefi Romeileh Azadeh Azami Gheymasi -
Open Access Article
146 - Green synthesis of nickel oxide nanoparticles using Eucalyptus leaf extract: Optical and Morphology Characterization
Fatemeh Mirsalari Elham Tahanpesar Haleh Sanaei shoar -
Open Access Article
147 - Evaluation of antimicrobial effects of synthesized Zinc sulphide nanoparticles and their potentiation by the anticancer drug imatinib
Bushra Issa Kayid Al-Zuabidi Mai Yaqoob Yousif Al-Marzooq Ahmed Naser Herez Al-Musawi -
Open Access Article
148 - Deletion of Auramine O and Crystal Violet from Industrial Aqueous Solution on to Albizia Lebbeck Leaves-Capped Silver Nanoparticles Synthesis Investigating Parameters Equilibrium
Fatemah Maghami Maryam Abrishamkar -
Open Access Article
149 - اثر رژیمهای کم آبیاری و نانوذرات سیلیکا بر عملکرد و شاخص بهرهوری آب در گیاه کاهو (Baby lettuce Vivian)
شکور طافی عبدالرحیم هوشمند ناصر عالم زاده انصاریرشد جمعیت و افزایش مشکلات زیست محیطی، تقاضای آب آبیاری در بسیاری از مناطق جهان را افزایش داده است. فناوری نانو تاثیرات زیادی در تولید پایدار محصولات کشاورزی داشته و می‎تواند خطرات زیست محیطی را کاهش داده و فرصت‎هایی برای تولید محصولات جدید فراهم کند. این تحقیق ب Moreرشد جمعیت و افزایش مشکلات زیست محیطی، تقاضای آب آبیاری در بسیاری از مناطق جهان را افزایش داده است. فناوری نانو تاثیرات زیادی در تولید پایدار محصولات کشاورزی داشته و می‎تواند خطرات زیست محیطی را کاهش داده و فرصت‎هایی برای تولید محصولات جدید فراهم کند. این تحقیق با هدف بررسی عملکرد و بهره­وری مصرف آب تحت شرایط رژیم­های کم­آبیاری و نانوذره سیلیکا انجام شد. مطالعه حاضر بر روی گیاه کاهو رقم baby lettuce Vivian در سه سطح ­آبیاری 75، 85 و 100 درصد نیاز آبی گیاه، سه سطح کاربرد نانوذره شامل: 0، 50 و 100 میلی­گرم بر لیتر به صورت تغذیه ریشه­ای در سه تکرار انجام شد. این طرح در قالب کرت­های خرد شده نواری و با طرح پایه بلوک­های کامل تصادفی تحلیل شد. براساس نتایج، بیش­ترین میزان پارامتر عملکرد کل به ترتیب در تیمار I100F100برابر 88/87 گرم بر بوته و کم­ترین میزان در تیمار I85F50با 47 گرم بر بوته به ثبت رسید. هم­چنین بالاترین عملکرد زیست­توده در تیمار I100F50 ثبت شد که برابر 33/61 گرم بر بوته بود و پایین­ترین عملکرد زیست­توده نیز در تیمار I75F100 گزارش گردید که برابر 26 گرم بر بوته بود. تیمار I100F50 با 53/20 کیوگرم بر مترمکعب بیش‎ترین بهره­وری مصرف آب را داشت. بالاترین و پایین­ترین شاخص برداشت در این پژوهش، به­ترتیب برابر 68/74 و 61/52 درصد بود. Manuscript profile -
Open Access Article
150 - Investigation of the Effect of Graphene-Silica Nanoparticles on Rheological and Thermo-physical Properties of Water-based Drilling Fluid
Mohammad Gholamhosein zadeh Ashkan GhafouriDrilling mud is one of the most important and basic requirements for drilling oil and gas wells. Optimization of drilling fluid properties leads to reduce drilling time and costs. Water-based drilling mud is one type of drilling fluid that is mainly used in drilling wel MoreDrilling mud is one of the most important and basic requirements for drilling oil and gas wells. Optimization of drilling fluid properties leads to reduce drilling time and costs. Water-based drilling mud is one type of drilling fluid that is mainly used in drilling wells due to its environmental compatibility. In this research, in order to increase the efficiency of this type of drilling fluid, graphene and silicon oxide nanoparticles in equal weight ratio in water-based drilling mud have been used. This study investigates the effect of different concentrations (0.25, 0.5, 0.75 and 1% volume fraction) of these nanoparticles on different properties of drilling fluid such as plastic viscosity, yield point, gel strength of 10 minutes and 10 seconds, circulation loss of the samples and the coefficient of thermal conductivity are discussed. All rheological properties tests are performed according to the standard (API RP 13B). The transient hot wire method has been used to determine the thermal conductivity of the fluid. The results show that the increase of nanoparticles has a significant effect on the rheological and thermo-physical properties of water-based drilling mud and reduces plastic viscosity (15%), decreases circulation loss of the samples (25%) and gel strength and also increases the thermal conductivity by 16% in the volume fraction of 1%. Manuscript profile -
Open Access Article
151 - Experimental study of the effect of silica nanoparticles on thermal and tribological properties of industrial lubricants
Abbas Taghipoor Hasan SabooeiLubrication is one of the most effective ways to reduce friction and reduce the excess heat generated in a mechanical system. Identifying the right additive to improve lubrication properties by additives that have features such as accessibility and higher quality perfor MoreLubrication is one of the most effective ways to reduce friction and reduce the excess heat generated in a mechanical system. Identifying the right additive to improve lubrication properties by additives that have features such as accessibility and higher quality performance is important. The aim of this study was to investigate the effect of silicon dioxide (SiO2) nanoparticles with different concentrations as additives on the thermal and anti-wear properties of lubricants. For this purpose, nanoparticles with concentrations of 0.2, 0.4 and 0.5 wt% were combined with oil. Span 80 surfactant, ultrasonic bath and high speed agitator were used to disperse the nanoparticles into the base fluid and achieve a stable nanofluid. The static stability of nanofluids was also visually investigated. The obtained results showed that the addition of nanoparticles to the oil does not cause any change in its state and over time no sedimentation and phase change was observed, which indicates the very good stability of this nanofluid. In the last stage, wear tests, determination of friction coefficient and thermal conductivity coefficient were performed on the samples. According to the results, the lowest amount of disc wear was related to the lubricating mixture with a concentration of 0.5% by weight. The weight loss of the discs due to wear for this mixture was 60.76%, the reduction of the coefficient of friction was 15.07% and the increase of the thermal conductivity was 2.4% compared to the base oil. Manuscript profile -
Open Access Article
152 - A novel method for magnetic stem cell delivery to the spinal cord injury using magnet combination
majid poladian fatemeh mokhtari amir shamlooMagnetic stem cell delivery is a promising method for imaging and regenerating damaged cells. To increase the accuracy of delivering stem cells to the target tissue, a precise and cost-effective magnetic system is needed. In this research, a method for arranging magnets MoreMagnetic stem cell delivery is a promising method for imaging and regenerating damaged cells. To increase the accuracy of delivering stem cells to the target tissue, a precise and cost-effective magnetic system is needed. In this research, a method for arranging magnets to improve the efficiency of stem cell transfer has been designed. The effects of these magnets on the movement of stem cells have been investigated. Different magnets with different arrangements were used for stem cell transfer and compared with each other. This research focuses on three categories of nerve-producing stem cells: bone marrow mesenchymal stem cells, nerve stem cells, and induced pluripotent stem cells. The results show that the arrangement of four magnets, with the side magnets of opposite poles, is more accurate in bringing all three types of stem cells to the injury site. The designed magnetic system can improve the accuracy of delivery of various stem cells in the spinal cord compared to previous methods. Also, the results show that the proposed method is more efficient in the neural stem cell category than in other categories. This method can be a good alternative to invasive methods including surgery. Manuscript profile -
Open Access Article
153 - An overview of the polyol synthesis process of cobalt carbide magnetic nanoparticles
مهدی کبریایی علی قاسمی محمدرضا لقمان شهاب ترکیانThis review explores the synthesis of cobalt carbide nanoparticles through a polyol reduction method, highlighting their acicular morphology, cluster assembly, and magnetic properties. The study reveals room temperature coercivities exceeding 3.4 kOe and maximum energy MoreThis review explores the synthesis of cobalt carbide nanoparticles through a polyol reduction method, highlighting their acicular morphology, cluster assembly, and magnetic properties. The study reveals room temperature coercivities exceeding 3.4 kOe and maximum energy products surpassing 20 kJ m-3. The composition of Co3C and Co2C phases, along with factors such as particle size and morphology, crucially influences permanent magnet characteristics. The acicular shape enhances coercivity and offers potential for particle alignment in nanocomposite cores. However, limitations arise at elevated temperatures due to irreversible dissociation. Further investigation into optimizing particle size, chemistry, and morphology is warranted. Additionally, the polyol process with PVP is shown to induce the formation of Co3C-structured Co carbide particles with enhanced coercivity. The use of hydroxide and chloride anions in the polyol process yields exchange-coupled cobalt–carbide nanocomposites and single-phase Co2C nanoparticles, each exhibiting distinct magnetic properties. Synthesis under a high external magnetic field results in cobalt–cobalt carbide microwires with controlled morphology and composition. The study also demonstrates the successful synthesis of cobalt carbide magnetic nanoparticles via a modified polyol process without rare-earth catalysts, showcasing promising magnetization and coercivity values at room temperature. The influence of reaction parameters, such as temperature, hydroxyl ion concentrations, and duration, on the crystallographic structure and magnetic properties is elucidated. Manuscript profile -
Open Access Article
154 - Investigating the removal of heavy metals using nanoclay composite stabilized on chitosan surface
قدرت اله موسوی ممبینی خوشناز پاینده لاله رومیانیThis research aimed to investigate the effect of nanoclay composite stabilized on chitosan surface in removing zinc, copper, iron and aluminum metals from fish meal Company effluent in 2017. Chitosan was prepared from common carp (Cyprinus carpio) skin. The amount of ab MoreThis research aimed to investigate the effect of nanoclay composite stabilized on chitosan surface in removing zinc, copper, iron and aluminum metals from fish meal Company effluent in 2017. Chitosan was prepared from common carp (Cyprinus carpio) skin. The amount of absorption of zinc, copper, iron and aluminum metals by chitosan-clay nanocomposite was investigated in five concentrations of 0, 0.2, 0.5, 0.8 and 1 weight percentage and at contact times of 60, 120 and 180 minutes. . In two concentrations of 0.2% and 0.5% of adsorbent and in contact times of 60 and 120 minutes, zinc and aluminum metals had the highest absorption rate compared to copper and iron metals, and in contact time of 180 minutes, iron metal had the highest absorption percentage (P<0.05). In concentrations of 0.8% and 1% of adsorbent in all three times, zinc metal has the highest removal percentage and aluminum has the lowest removal percentage (P<0.05) and two metals iron and copper rank second without any significant difference were placed (P<0.05). The results of the present study showed that the amount of metal absorption by chitosan-clay nanocomposite is related to the concentration of the adsorbent and the contact time and chitosan-clay nanocomposite can be used to remove and reduce the level of heavy metal contamination in the wastewater of fishmeal and other food factories. Manuscript profile -
Open Access Article
155 - Synthesis Silver Nanoparticles by Recovery Silver from Anode Slime of Kerman Sarcheshmeh Cooper Complex
H. Zahedi A. Mollahosseini E. Noroozian -
Open Access Article
156 - Influence of Solution Temperature and pH on Size and Morphology Improvement of Chitosan Nanoparticles as Protein Delivery Vehicles
N. Kiaie R. Mehdinavaz Aghdam H. Ahmadi Tafti Sh. Hojati Emami J. Izadi Mobarakeh -
Open Access Article
157 - Synergistic Effects of Taxus baccata Extract Mixtures with Silver Nanoparticles against Bacteria and Fungal
M. Ghaedi M. Yousefi Nejad L. Delshad -
Open Access Article
158 - Synthesis of Nano-Sized Titania Particles by Hydrolysis of Titanium Tetrachloride
M. Farahmandjou M. Ramazani -
Open Access Article
159 - Cubic NiO Nanoparticles: Synthesis and Characterization
A.A. Dehno Khalaji D. Das J.S. Matalobos F. Gharib -
Open Access Article
160 - Catalytic Synthesis N-alkyl-3-acetyl-2-methylpyrroles using ZnO Nanostructure
A.S. Shahvelayati M. Sabbaghan S. Banihashem -
Open Access Article
161 - Effects of clay nanoparticles added to the bonab landfill soil to reduce the permeability and control of leachate
Mohammad Azar-Afza ابراهیم Asghari-Koljahi M.R MashrafifarSolid waste excretion is one of the problems of urbanization. The last element obligated the waste managementsystem and the final destiny all wastes should be discarded is bury. Engineering buried sanitary landfill methodof waste disposal in land, is to prevent harm to MoreSolid waste excretion is one of the problems of urbanization. The last element obligated the waste managementsystem and the final destiny all wastes should be discarded is bury. Engineering buried sanitary landfill methodof waste disposal in land, is to prevent harm to the environment. Landfills in the case of non-compliance withengineering principles, the ability to create very high pollution in the environment, groundwater, surface waterand soil. that is have concerned authorities and the public. One of the major landfill pollution, the infecting iscaused by the movement of leachate and groundwater contamination. In the design and management of landfills,leachate control, body construction, drainage channels design, is one of the most important factors. Control andreduce the permeability of the landfill is critical environmental factors. To reduce the permeability of the landfillbody used geomembranes, clay layers and other impermeable materials.In this study, the effects of added nanoparticles of clay to landfill body soil to reduced permeability has beeninvestigated. This study located in the Bonab city of East Azarbaijan. The results show that adding 3% to 9%clay nanoparticles caused a significant reduction in soil permeability of landfill body. So that the soilpermeability reduced from 3.25×10-6 to 4.22× 10-7 centimeter per second in normal leachate conditions. In acidicleachate conditions soil permeability reduced from 3.83×10-6 to 7.20× 10-7 centimeter per second and in alkalineor basic leachate conditions from 2.76×10-6 to 2.02× 10-7 centimeter per second. Thus, the addition of clay andclay nanoparticles significantly reduce the permeability of landfill body to passing leachate. Manuscript profile -
Open Access Article
162 - Entropy generation of nano-fluid inside concentric annuli with rotating outer cylinder
سعید عمادالدین احد عابدینی اسفهلانیIn this study entropy generation inside horizontal concentric annulus for Cu Nano-fluid (water) under the constant-temperature conditions has been investigated. The fluid flow inside the cylinder is laminar and the outer cylinder is rotating. The temperature of the oute MoreIn this study entropy generation inside horizontal concentric annulus for Cu Nano-fluid (water) under the constant-temperature conditions has been investigated. The fluid flow inside the cylinder is laminar and the outer cylinder is rotating. The temperature of the outer cylinder is higher and the temperature difference of the two cylinders is always constant. (Result show) Adding nanoparticles to the base fluid at constant boundary conditions has very little effect on the temperature distribution. As the Brinkman number increases, the entropy generation increases where using nanoparticles in the base fluid decreases entropy generation. Friction and heat transfer effects on the total entropy has been studied. It has been shown viscous dissipation is more effective in entropy generation. Extracted results shows that as the Reynolds number increase, the amount of entropy generation increases, and adding nanoparticles lead to the increase of Nusselt number up to 30 percent. Manuscript profile -
Open Access Article
163 - Laminar flow modeling of different nano fluids around a flat plate fin for geometry optimization at the heat sink
seyyed mohammad javad taheri Ali HeydariThis paper presents a mathematical model for geometry optimization of a rectangular cross-section flat plate fin with application in calculating optimized width of a heat sink for different Nano fluids (Aluminum oxide, Silicon dioxide, Titanium dioxide, Copper oxide, Go MoreThis paper presents a mathematical model for geometry optimization of a rectangular cross-section flat plate fin with application in calculating optimized width of a heat sink for different Nano fluids (Aluminum oxide, Silicon dioxide, Titanium dioxide, Copper oxide, Gold, Copper, Diamond and Ferros oxide) with water as based fluid. Flow impinging on the fin is considered laminar. The effects of Reynolds number, volume fraction of nanoparticles, particle size, inlet velocity and different average temperature on the geometry optimization of the fin are investigated. A rectangular flat plate fin made from copper with higher thermal conductivity is used as the test case. Various Nano fluids with different volume fractions (0.005% to 0.1%) and different nanoparticle sizes (3×10-8 to 1×10-7 nanometer) are analyzed. In this analysis, as a basic assumption, the length of the fin is taken larger than the width and the fin volume is considered constant. Then, width of the fin will be optimized. The results indicated that the highest and the lowest optimized width is related to Gold and silicon dioxide nano fluids respectively. Increase in volume fraction, inlet velocity and temperature and decrease in nano particle size leads to optimized width enhancement. Manuscript profile -
Open Access Article
164 - A literature review on the effect of using porous materials and Nanoparticles on improving of the performance of solar stills
Nader Rahbar Ali Khosh AhangDrinking water scarcity has become one of the main challenges of human societies in recent years. Most of the water resources are stored as the non-drinkable saline water or are frozen in the poles. Therefore, they cannot be used directly for drinking. This issue indica MoreDrinking water scarcity has become one of the main challenges of human societies in recent years. Most of the water resources are stored as the non-drinkable saline water or are frozen in the poles. Therefore, they cannot be used directly for drinking. This issue indicates the importance of using appropriate techniques for water purification. One of these techniques is the usage of solar stills that can be used in remote tropical areas. The simple structure, low cost of manufacturing, and the usage of solar energy as a clean source is some benefits of this kind of equipment. The main problem of solar stills is their low efficiency. The researchers in this field used many active and passive methods to increase the efficiency of this device. In this research, two passive techniques used for enhancing the efficiency of solar stills containing usage of porous materials and nanoparticles are reviewed. The results of the research in these fields are briefly presented. Finally, based on the literature review, some suggestions for future works are provided. Manuscript profile -
Open Access Article
165 - Detection the effect of Thymus vulgaris essential oils and Zno nanoparticle on multi drug resistance acinetobacter baumannii
Fatemeh Noorbakhsh Mozhgan Alikahi Maasuomeh Mahdavi OurtakandAbstract Introduction: Many valuable drugs have now lost their effect on Acinetobacter baumannii, and the drug resistance of A. baumannii is a major cause of failure in the treatment of hospital infections. The aim of this study was to investigate the effect of Thymus v MoreAbstract Introduction: Many valuable drugs have now lost their effect on Acinetobacter baumannii, and the drug resistance of A. baumannii is a major cause of failure in the treatment of hospital infections. The aim of this study was to investigate the effect of Thymus vulgaris essential oil and ZnO nanoparticles on multidrug resistant Acinetobacter baumannii. Materials and Methods: This study was performed on 46 strains of A. baumannii isolated from clinical samples of patients at Tehran Heart Hospital. Antibiotic susceptibility of the isolates was determined by disk diffusion method according to CLSI 2018 standard. Micro-dilution broth test was then performed to determine the minimum inhibitory concentration (MIC) for amikacin, ciprofloxacin , imipenem antibiotics, T. vulgaris essential oil and ZnO nanoparticles. Results: Based on the results of disk diffusion sensitivity tests, it was found that the highest resistance to imipenem and ciprofloxacin antibiotics were 97.82%. In the present study the most susceptible strains to the T. vulgaris essential oil were observed at concentration 0.5 µg/ml and the least sensitivity at concentrations 0.312 and 0.625 µg/ml. also based on the results obtained in this stady the highest susceptible strains to ZnO nanoparticles was at concentrations 4096 µg/ml and the lowest sensitivity at concentrations 256 µg/ml. Discussion & Conclusion: the results of this study indicate the potent inhibitory effect of T. vulgaris essential oil and ZnO nanoparticles on Acinetobacter baumannii Manuscript profile -
Open Access Article
166 - The effect of green silver nanoparticles on spinach (Spinacia oleracea) seed germination under salt stress
Amin Ali Naghi Zadeh Mehrnaz Mahmoudi Zarandi Sayed Mohammad Reza Khoshroo Fatemeh Hasan ZadehSalinity is one of the most important abiotic stresses for plants and its adverse effects on different stages of plant growth and yield have been reported. Salinity can reduce seed germination as the most sensitive stage of plant growth. The use of silver nanoparticles MoreSalinity is one of the most important abiotic stresses for plants and its adverse effects on different stages of plant growth and yield have been reported. Salinity can reduce seed germination as the most sensitive stage of plant growth. The use of silver nanoparticles has been suggested to improve the germination of some plants in salinity conditions. On the other hand, consuming spinach is highly recommended due to its high nutritional value. In this study, aloe vera extract was used for synthesis of silver nanoparticles. Then, the effects of salinity on seed germination of spinach and the role of silver nanoparticles on seed germination indices in this plant were investigated. The formation of silver nitrate nanoparticles was investigated using a spectrophotometer, XRD analysis, and electron microscopy. Spherical nanoparticles, with an average size of 11.97 nm to 29.46 nm were observed. Treatments in a completely randomized design with three replications of green silver nanoparticles at concentrations of 10, 20, 40, 80 and 100 ppm and salinity at four levels of 0, 50, 100 and 150 mM on spinach seed germination process were investigated . The results showed that the germination process under salinity conditions decreased significantly compared to the control group. Treatment of 40 ppm concentration of silver nanoparticles for different levels of salinity had a significantly increased effect on germination indices at 1% level . Manuscript profile -
Open Access Article
167 - The effect of synthetic silver nanoparticle from hydroalcoholic extract Digitalis nervosa on CDH1, Bax , Bcl2 and P53 gene expressions in cervical cancer cell line)Hela(
nazila ahmadzadeh nastran asghari moghaddam zahra keshtmandNowadays, metal nanoparticles, especially silver, due to their special physical properties and anti-cancer effects have been considered.One of the methods of synthesis of these nanoparticles is the use of plant extracts. The aim of this study was to investigate the anti MoreNowadays, metal nanoparticles, especially silver, due to their special physical properties and anti-cancer effects have been considered.One of the methods of synthesis of these nanoparticles is the use of plant extracts. The aim of this study was to investigate the anti-cancer effects of silver nanoparticles synthesized of the hydroalcoholic extract of Digitalis nervosa on the cancer cell line (Hela).In this experimental study,the synthesis of silver nanoparticles was performed by adding the hydroalcoholic extract of Digitalis nervosa to the silver nitrate solution. Physical and chemical properties of synthesized nanoparticles were determined by UV-vis, TEM, SEM, EDX and XRD methods.Viability of Hela cancer cells by MTT method with different concentrations of synthesized silver nanoparticles(3.125 to 100 mg/ml) and the expression of Bax, Bcl2, P53 and CDH1 genes were evaluated using real time PCR technique in 24 hours.Data were analyzed using GraphPad software and one-way ANOVA test.P<0.05 was considered statistically significant.The results showed that the results of cytotoxicity at different concentrations of silver nanoparticles showed that IC50 was16.66 μg /ml, respectively. Also, the expression of Bax, CDH1 and P53 apoptotic genes in concentration-(16.66μg/ml) increased and Bcl2 gene expression decreased compared to the reference gene, which showed the effects of cytotoxicity and changes in nanoparticle concentration. Silver nanoparticles synthesized from the extract of the Digitalis nervosa plant have a cytotoxic effect and possibly induce apoptosis on Hela cancer cells. Manuscript profile -
Open Access Article
168 - Study of Antibacterial Synergistic Effect of Origanum vulgare L. Essential Oil and Silver Nanoparticles
Nahid mohammadzadeh Maasuomeh Mahdavi-Ourtakand Sahar Honarmand JahromiThe increasing use of antibiotics and the prevalence of resistant strains have necessitated the use of new antimicrobial drugs. Combination therapy is an effective strategy to combat antibacterial resistance. The aim of this study was to investigate the antibacterial sy MoreThe increasing use of antibiotics and the prevalence of resistant strains have necessitated the use of new antimicrobial drugs. Combination therapy is an effective strategy to combat antibacterial resistance. The aim of this study was to investigate the antibacterial synergistic effect of Origanum vulgare essential oil and silver nanoparticles on gram-positive and gram-negative bacteria. In this study, O. vulgare essential oil was extracted from the plant branch. A colloidal solution of silver nanoparticles with an average particle diameter of 68 nm was purchased. The antibacterial effect of O. vulgare essential oil and silver nanoparticles was investigated alone and then in combination by broth microdilution method and their minimum inhibitory concentration (MIC) against gram-positive and gram-negative bacteria was determined. The bacteria studied were Escherichia coli, Salmonella enterica, Bacillus subtilis and Staphylococcus aureus. Based on the obtained results, the synergistic effect of O. vulgare essential oil and silver nanoparticles had significant antimicrobial effects on all studied bacteria. The results showed that the synergistic effect of O. vulgare essential oil and silver nanoparticles was effective in inhibiting and killing the studied bacteria. And they can be useful in developing new drugs against these bacteria. Manuscript profile -
Open Access Article
169 - Evaluation of the effect of gold nanostructure on the production of bio surfactants from Pseudomonas aeruginosa
Yaser Ahsani Arani Zahra Noormohammadi behnam rasekh fatemeh Yazdian Hojjat kazemi Raminolipids belong to the group of glycolipid bio surfactants and were first isolated from Pseudomonas aeruginosa. Rhamnolipids are a good alternative to synthetic surfactants due to their low toxicity, biodegradability and selective performance. In this s More Raminolipids belong to the group of glycolipid bio surfactants and were first isolated from Pseudomonas aeruginosa. Rhamnolipids are a good alternative to synthetic surfactants due to their low toxicity, biodegradability and selective performance. In this study, the effect of gold (Au) nanoparticles on the growth and production of Pseudomonas aeruginosa PBCC5 bio surfactant was evaluated. Different concentrations of 1, 500 and 1000 mg / l nanoparticles were used. In this study, bio surfactant surface tension and emulsification indices (24E) were measured. The presence of nanoparticles on the bacterial surface was investigated by TEM and the morphology of nanoparticles was investigated by SEM. Binding of nanoparticles to bio surfactants was confirmed by TEM. The results showed that gold nanoparticles were not bactericidal and also increased bacterial growth and bio surfactant production. The surface tension of all samples was reduced from 72 mN / m distilled water to 35-32 mN / m. Manuscript profile -
Open Access Article
170 - Investigation of structural and ultrastructural changes of canola (Brassica napus L.) leaf under cobalt oxide nanoparticles treatment
Malihe Jahani Ramazan Ali Khavari-Nejad Homa Mahmoodzadeh Sara Saadatmand Sedighe JahaniCobalt oxide nanoparticles (Co3O4 NPs) are one of the most widely used magnetic NPs in various industries and their interactions with the environment are predictable. The aim of this study was to investigate the impact of Co3O4 NPs on leaf structure and ultrastructure o MoreCobalt oxide nanoparticles (Co3O4 NPs) are one of the most widely used magnetic NPs in various industries and their interactions with the environment are predictable. The aim of this study was to investigate the impact of Co3O4 NPs on leaf structure and ultrastructure of canola. Seeds were sown in pots under greenhouse conditions and after two weeks, seedlings were treated with Co3O4 NPs (0 and 4000 μg/mL) by leaf spray for five weeks. Then, leaf morphological changes were measured. Also, sampling from control leaf and NPs treatment were performed to investigate structural and ultrastructural changes. Tissue preparation was performed and samples were examined by light and transmission electron microscopy (TEM). Morphological changes including reduction in the length, width and area of leaf of canola treated with Co3O4 NPs were observed. Also, ultrastructural changes of canola leaf mesophilic cells treated with Co3O4 NPs including reduction of chloroplasts number and their swelling, accumulation and deposition of NPs in vacuoles and cell walls, observation of protein bodies, increase in the size of plastoglobules and starch grains in chloroplasts were observed. In addition, the results of cobalt elemental assay by methods of inductive coupled plasma emission spectrometry (ICP-OES) and energy dispersive X-ray spectroscopy (EDX), in line with TEM results, showed the uptake and accumulation of Co3O4 NPs in canola leaves. Ultrastructural damage in TEM results indicated the toxicity of high concentration of Co3O4 NPs at the cellular level. Therefore, potential of hazardous effects of Co3O4 NPs on other crops and environment should be considered. Manuscript profile -
Open Access Article
171 - Investigating the impact of cerium oxide (CeO2) nanoparticles on structural and ultrastructural changes of marigold (Calendula officinalis L.) leaves
Sedighe Jahani Malihe Jahani Sara Saadatmand Homa Mahmoodzadeh Ramazan Ali Khavari-NejadIntroduction: Cerium oxide nanoparticles (CeO2 NPs) are one of the most widely used NPs in the world and their interaction with the ecosystem is unavoidable. Aim: The aim of this study was to investigate structural and ultrastructural changes in marigold leaves under Ce MoreIntroduction: Cerium oxide nanoparticles (CeO2 NPs) are one of the most widely used NPs in the world and their interaction with the ecosystem is unavoidable. Aim: The aim of this study was to investigate structural and ultrastructural changes in marigold leaves under CeO2 NPs. Materials and methods: Seeds were sown in pots under greenhouse conditions and after two weeks, seedlings were exposed to CeO2 NPs (0 and 3200 μg/mL) by leaf spray for five weeks. Then, leaf morphological changes were measured. Also, sampling from the control and NPs treatment leaf were performed to investigate structural and ultrastructural changes. Tissue preparation was performed and samples were examined by light and transmission electron microscopy (TEM). Results: Morphological changes including diminish in the length, width and area of marigold leaf under CeO2 NPs were observed. Also, ultrastructural changes of mesophilic cells of marigold leaf under CeO2 NPs including diminish of chloroplasts number and their swelling, incement of peroxisomes number, disintegration of cell membrane, and accumulation and deposition of NPs in the intercellular spaces, cell wall and membrane, vacuole, peroxisome and chloroplast stroma were observed. In addition, the results of cerium elemental assessment by methods of inductive coupled plasma emission spectrometry (ICP-OES) and energy dispersive X-ray spectroscopy (EDX), in line with TEM results, showed the uptake and accumulation of CeO2 NPs in marigold leaves. Conclusion: Ultrastructural damage in TEM results indicated the toxicity of high dosage of CeO2 NPs at the cellular level. Therefore, potential of hazardous impacts of CeO2 NPs on other medicinal plants and environment should be considered. Manuscript profile -
Open Access Article
172 - Synthesis of copper oxide nanoparticles by chemical method and investigation of their antimicrobial properties
Mina Ramezani Asma Shamsai Ramin Mohammadi-AlouchehIntroduction: Copper oxide is one of the most important metal oxides that has unique properties in various technological applications, such as superconductors, and has been used as an antimicrobial agent against numerous bacterial species. In the present study, CuO Nps MoreIntroduction: Copper oxide is one of the most important metal oxides that has unique properties in various technological applications, such as superconductors, and has been used as an antimicrobial agent against numerous bacterial species. In the present study, CuO Nps was synthesized using chemical methods and its antimicrobial activity was investigated. Materials and Methods: Copper oxide nanoparticles were synthesized using the microwave method, and XRD, EDX, SEM, FTIR, and UV-vis analyses were performed to investigate the physical and chemical properties. The antimicrobial and antifungal effects of copper oxide nanoparticles on pathogenic bacteria including Staphylococcus aureus, Escherichia coli, and Fusarium solani were evaluated using MIC and MBC tests and well diffusion assay. Results: The results showed that at a concentration of 20 mg/mL, copper oxide nanoparticles inhibited the growth of Staphylococcus aureus. Similarly, growth inhibition of Escherichia coli was observed at a concentration of 4 mg/mL of nanoparticles. Furthermore, Fusarium solani exhibited increased sensitivity to copper oxide nanoparticles at concentrations higher than 50 mg/mL, with a growth inhibition zone diameter of 18 mm at a concentration of 100 mg/mL. Discussion and Conclusion: Copper oxide nanoparticles can be introduced as a strong antimicrobial agent. Manuscript profile -
Open Access Article
173 - A review on the synthesis of silica nanoparticles and their applications in environmental remediation
Mehrab Fallahi-Samberan Samaneh KhodadadiEnvironmental remediation deals with the removal of contaminants from environment for maintaining and restoring the quality of soil, water, and air and, more in general, for protecting human health. At present, a wide range of silica products is manufactured for applica MoreEnvironmental remediation deals with the removal of contaminants from environment for maintaining and restoring the quality of soil, water, and air and, more in general, for protecting human health. At present, a wide range of silica products is manufactured for applications in microelectronics, medicine, pharmacy and so on. A more ambitious use of nanosilicas is remediation of contaminated environments and, recently, their application in wastewater treatment has emerged as a fast-developing and attractive area of interest. Because of high surface area, silica nanoparticles show a very good adsorption capacity and a large specific reactivity. Recent studies have shown that hydrophilic and hydrophobic silica nanoparticles are very efficient in removing pollutants such as dyes, metallic species, and pesticides from water, and wastewaters. Another interesting benefit of silica nanoparticles as adsorbents is that they are considered non-toxic and not harmful to the environment. Moreover, nanosilica based technology shows an attractive cost-effectiveness ratio as it requires relatively cheap processing of raw materials. This paper has reviewed the recent progresses in remediation by silica nanoparticles and their synthesis methods. Manuscript profile -
Open Access Article
174 - Optimization of montmorillonite nanoparticles in tin removal from effluent
maryam moghaddas Sepideh Kamalzadeh Simin ArabiIn this study, the efficiency of montmorillonite nanoparticles to remove tin metal from the effluent was investigated.Raw nanoclay reduced the tin concentration to 88.5 ppm at pH = 5.5, ambient temperature, 0.12 g per 100 ml of 100 ppm solution, 90 minutes contact time MoreIn this study, the efficiency of montmorillonite nanoparticles to remove tin metal from the effluent was investigated.Raw nanoclay reduced the tin concentration to 88.5 ppm at pH = 5.5, ambient temperature, 0.12 g per 100 ml of 100 ppm solution, 90 minutes contact time for tin. After washing the nanoclay with 0.1 M sulfuric acid and performing adsorption test under the above conditions, the tin concentration decreased to 65 ppm and the tin adsorption capacity by raw and washed nanoclay was 9.6 and 29.7 mg / g, respectively. It was found to be consistent with previous studies. At pH, the concentration of tin metal by HQ-modified nanoclay decreased from 100 ppm to 59.4 ppm and by SDS-modified nanoclay to 56.63 ppm, and the adsorption capacity was 33.83 and 36.14 mg / g, respectively. شد. It can be seen that SDS-modified nanoclay has yielded better results for tin metal. Then studies on isotherm, kinetics and thermodynamics of adsorption were performed. In isotherm studies, by holding the amount of adsorbent (0.12 g), contact time, temperature, pH = 5.5 and volume of 100 ml, the values of initial concentrations of metal ions 50, 100 and 200 ppm were investigated.Thermodynamic studies show that by keeping parameters such as initial concentration, pH, contact time, adsorbent amount and solution volume in optimal conditions at 298, 313 and 333 K, increasing the temperature increases the adsorption capacity, which indicates that the reaction is calorific. Manuscript profile -
Open Access Article
175 - Study of kinetic and changes in the diffusion coefficient of the release of doxorubicin-Chrysin drugs coated with magnetic nanoparticles and polycaprolactone-polyethylene glycol copolymers
Sahar Jahangiri Leila Amirkhani Abolfazl Akbarzadeh Reza HajimohammadiIn recent years, the development of nanoparticles in the field of drug release has received much attention. This research aims to develop new methods for the physical modification of Fe3O4 superparamagnetic nanoparticles with polymers through physical retention. In this MoreIn recent years, the development of nanoparticles in the field of drug release has received much attention. This research aims to develop new methods for the physical modification of Fe3O4 superparamagnetic nanoparticles with polymers through physical retention. In this study, after synthesizing the biodegradable polycaprolactone-polyethylene glycol magnetic copolymer, the anticancer drugs doxorubicin and Chrysin in these polymers were encapsulated by dual emulsion (w / o / w). The effect of temperature and pH on drug release was investigated. After performing kinetic studies, the diffusion coefficient of drug release was also studied. The drug distribution was considered uniform and the system was assumed to be in Cartesian coordinates. The results showed that the diffusion coefficient of drug release followed Fick's law. At first, due to the high concentration difference of drugs in the early times, the diffusion coefficient was higher, but then with time and with decreasing the concentration difference, the diffusion coefficient decreased and remained constant. Manuscript profile -
Open Access Article
176 - Investigation of scattering caused by electric field in TiO2 nanocrystals
majid shabzendehA combination of external Electric Field and Raman backscattering, as a new method called Electric Field Induced Raman scattering, has been used to study TiO2 Nanocrystallites. This method can be widely used to obtain phononic properties of materials. In this article, w MoreA combination of external Electric Field and Raman backscattering, as a new method called Electric Field Induced Raman scattering, has been used to study TiO2 Nanocrystallites. This method can be widely used to obtain phononic properties of materials. In this article, we report the fabrication of TiO2 Nanoparticles and their restriction in our lab by a simple modified sol-gel process. Moreover, the TiO2 Nanocrystallites synthesized were characterized by X-ray Diffraction and back scattering Raman techniques. Furthermore, the effects of an external direct current electric field on the lattice internal and external modes of the Nanocrystallites were investigated by the recorded in situ Raman data. Our results show that the applied external electric field can make a strong interaction and widening of the Raman active modes, the intensity amplifying and possible peak shifts in the Raman spectra can be observed.In this article, an attempt is made to investigate the effect of electric field on nanoparticles. Manuscript profile -
Open Access Article
177 - A review of the antimicrobial and antibacterial effects of silver nanoparticles and silver composites
Zahra Javanshir Maryam MohammadpoorToday, nanoparticles include a wide range of particles with unique properties. Due to their small size and unique properties, these particles can be used in various sciences. Nanoscale biological compounds have unique physical-chemical properties that are In recent year MoreToday, nanoparticles include a wide range of particles with unique properties. Due to their small size and unique properties, these particles can be used in various sciences. Nanoscale biological compounds have unique physical-chemical properties that are In recent years, recently, the efficacy of antimicrobial nanoparticles, especially silver nanoparticles and their antimicrobial activity, has been the focus of researchers and researches have been conducted. In this study, recent advances and research results of researchers in the use of antibacterial and antiseptic properties of silver nanoparticles, silver and silver composites have been reviewed.The search was done on SID and Google Scholar sites. We did not have a time limit for the search, and all the articles that met the entry criteria were included in the study until March 2018. Among the articles found, some of the articles with the conditions including the complete article have antibacterial and anti-infective properties. 10 articles were evaluated. All the articles have anti-bacterial and anti-infective properties of Silver nanoparticles, silver and silver composites have been in different levels. Manuscript profile -
Open Access Article
178 - Synthesis of iron nanoparticles using the aqueous extract of the medicinal plant Trachyspermum copticum L. and studying its antioxidant properties
Hojjat Eghbal Nima MohammadNehgad Khiyavi Mehdi Ahmadi Sabegh Mostafa Jahani JelodarluTrachyspermum copticum L. is one of the most important Medicinal plants in Iran, which has the potential to synthesize nanoparticles from the extracts of its seeds or aerial parts. In this study, the possibility of green synthesis of iron-free nanoparticles using Trachy MoreTrachyspermum copticum L. is one of the most important Medicinal plants in Iran, which has the potential to synthesize nanoparticles from the extracts of its seeds or aerial parts. In this study, the possibility of green synthesis of iron-free nanoparticles using Trachyspermum copticum L. seed extracts was investigated. Materials and methods: In this study, the seed extract of the Medicinal plant Trachyspermum copticum L. was used for the green synthesis of iron nanoparticles. Antioxidant properties and total amount of phenolic compounds of seed extract and extract containing iron Nano particles were determined. The structural investigation of iron nanoparticles was done using a scanning electron microscope. Findings: According to the obtained results, it can be said that the formation of iron nanoparticles was confirmed by changing the color of the solution from yellow to brown, and antioxidant properties were observed both in the extract containing seeds and in the extract containing iron nanoparticles. And the addition of iron nanoparticles increased the antioxidant properties of Trachyspermum copticum L. medicinal plant. The structural investigation of iron nanoparticles using a scanning electron microscope also showed that the shape of the particles is spherical and its dimensions are 200 nm. Conclusion: The results of these experiments showed that it is possible to use the seed extract of zenian medicinal plant for the synthesis of zero-valent iron nanoparticles, and the increase of zero-valent iron nanoparticles increases its antioxidant properties. Manuscript profile -
Open Access Article
179 - Optimization of Non-volatile Memory Cell and Energy Consumption in Robot Systems by Synthesized Silicon Nanoparticles via Electrical Discharge
Mehdi Mardanian -
Open Access Article
180 - Improvment of Physiological and Agronomic Characteristics of Winter Oilseed Rape (Brassica napus L.) with Nano-Selenium Application
Gholam Behzad Parisa Sheikhzadeh Nasser Zare Mitra RostamiTo investigate the effect of foliar selenium nanoparticle applications on the agronomic and yield characteristics of winter oilseed rape, with three levels (0 (control), 25 and 50 mg.L-1) at two growth stages (6-8 leaves and 50% flowering) at the research farm station o MoreTo investigate the effect of foliar selenium nanoparticle applications on the agronomic and yield characteristics of winter oilseed rape, with three levels (0 (control), 25 and 50 mg.L-1) at two growth stages (6-8 leaves and 50% flowering) at the research farm station of the University of Mohaghegh Ardabili during 2018-2019 was studied. The results showed that the selenium nanoparticle applications increased the photosynthetic pigments and the relative water content (RWC) of the leaves significantly. Foliar spraying with 50 mg.L-1 selenium nanoparticle increased in the chlorophyll a and b and total chlorophyll content by 37.04, 44.51 and 39.68%, respectively, as compared to the control treatment. On the other hands, selenium nanoparticle application increased the plant height, number of branches and stem diameter via improving the photosynthetic pigments content and RWC of winter oilseed rape significantly. The biological yield, harvest index and seed oil content of 25 and 50 mg.L-1 of selenium nanoparticle treatments were significantly higher than those of the control. The foliar spraying of oilseed rape plants with selenium nanoparticle applications improved the grain yield throught increase in the number of pods per plant, the number of seeds per pod and the 1000 grain weight significantly. Thus, the highest improvement in the grain yield per unit area (about 34.16 %) was obtained with application of 50 mg.L-1 selenium nanoparticles in comparison with control treatment. In general, the application of 50 mg.L-1 selenium nanoparticles had a positive and significant effect on the physiological (photosynthetic pigments content and RWC) and agronomical characteristics at plants, as to the plant height, branches number, stem diameter, the number of pods per plant, the number of seeds per pod, the 1000-grain weight and seed oil content of winter rape. Manuscript profile -
Open Access Article
181 - Evaluation of Photosynthetic Activity, Carbohydrates, Proline and Essential Oils (Ocimum basilicum L.) under the Elicitor of β-Cyclodextrin Nanoparticles
Azadeh Loni Sara Saadatmand Hossien Lari Yazdi Alireza IranbakhshInduction of engineered nanoparticles into medicinal plants causes resistance, enhances quantitative and qualitative performance and effective substances in them. In this study, β-cyclodextrin nanoparticles (β-CDNPS) were synthesized. The nanoparticle profile MoreInduction of engineered nanoparticles into medicinal plants causes resistance, enhances quantitative and qualitative performance and effective substances in them. In this study, β-cyclodextrin nanoparticles (β-CDNPS) were synthesized. The nanoparticle profile was determined by UV-VIS spectrum, transmission electron microscopy (TEM) and dynamic light scattering (DLS). Then different concentrations of β-CDNPs including 0, 10, 50, 100 mg / l were used for foliar spray of basil (Ocimum basilicumc.v. Keshkeni luvelou). The amount of chlorophyll pigments and basil essential oil was significantly different (P≤ 5%) compared to the control.The maximum amount of chlorophyll b was observed in 100ppm treatment. The results showed a significant reduction (P≤5%) of the minimum fluorescence value (Fo) in the treatment of 50 ppm compared to the control and two levels of 10 and 100 ppm of β-CDNPS. The level of 50 ppm significantly increased (P≤ 5%) the maximum fluorescence, variable fluorescence (Fv), photochemical efficiency of the photosystem compared to the control. Foliar spray of β-CDNPS caused changes in basil gas exchange. Soluble sugars and proline of basil leave and root in 50ppm treatment had a significant increase (P≤%5) compared to the control, so that insoluble sugars in leave and root showed the opposite trend. In the presence of β-CDNPS, phenylpropanoids and terpenoids concentration, in the basil showed a significant difference (P≤5%) compared to the control group. Induction of β-CDNPS nanoparticles in the biosynthesis pathway of secondary metabolites results in plant productivity Basil plant under the treatment of nano β-cyclodextrin, with concentration-dependent behavior increased yield per unit area. Therefore, foliar spray at the right concentration can act as an inducer while stimulating, preserving the active ingredients in basil and increase the content of essential oil for food and drug consumption. Manuscript profile -
Open Access Article
182 - A review of different methods of green synthesis of nanoparticles by microalgae
bahareh nowruziThe use of microalgae for the synthesis of nanoparticles is a safe, environmentally friendly and inexpensive method with energy saving that produces nanoparticles of various shapes and sizes. Nanoparticles produced by microalgae have various biological, physical and che MoreThe use of microalgae for the synthesis of nanoparticles is a safe, environmentally friendly and inexpensive method with energy saving that produces nanoparticles of various shapes and sizes. Nanoparticles produced by microalgae have various biological, physical and chemical properties that have all-round applications as antimicrobial, anticancer, photocatalytic agents, etc. Although many studies have been conducted on biological synthesis using microorganisms, few studies have been conducted on the synthesis of nanoparticles using cyanobacteria. This article comprehensively describes the production of nanoparticles by cyanobacteria, the abiotic and biotic conditions of their biosynthesis, including lighting, pH, temperature, the type of synthesis process (extracellular and intracellular), the mechanisms related to biological synthesis, and also explain the factors affecting the synthesis process. Manuscript profile -
Open Access Article
183 - Antibacterial effect of iron oxide nanoparticles (Fe3O4) in water treatment
N. Shabani A. Javadi H. Jafarizadeh-Malmiri H. Mirzaei J. SadeghiIn water applications, improper drainage systems increase the pollution of water resources. This study aimed to find an eco-friendly water disinfectant in the coagulation stage of drinking water treatment plants. In this study, iron oxide nanoparticles were synthesized MoreIn water applications, improper drainage systems increase the pollution of water resources. This study aimed to find an eco-friendly water disinfectant in the coagulation stage of drinking water treatment plants. In this study, iron oxide nanoparticles were synthesized by the co-precipitation method. The antibacterial activity of iron oxide nanoparticles was assessed on six important water-polluting bacteria (Escherichia coli, Enterococcus faecalis, Klebsiella pneumoniae, Pseudomonas aeruginosa, Bacillus cereus, and Staphylococcus aureus). The results showed that the highest effect of synthesized iron oxide nanoparticles with MIC< 0.07 μg/ml is against B. cereus and E. faecalis. In addition, iron oxide nanoparticles had antibacterial activity against Staphylococcus aureus with MIC= 0.3 μg/ml and in K. pneumoniae with MIC= 1.25 and P. aeruginosa and E. coli with MIC= 0.6 μg/ml. MBC results showed that iron oxide nanoparticles were to eliminate 99.9% of E. coli and S. aureus bacteria at a concentration of 1.25 μg/ml and K. pneumoniae at a concentration of 2.5 μg/ml. The obtained results show the antibacterial potential of nanoparticles for use in water treatment. It seems that the use of Fe3O4 nanoparticles as adsorbents in the water treatment process can be an efficient and economical alternative to disinfect water in the early stages of water treatment. Manuscript profile -
Open Access Article
184 - The effect of biocomposite coating based on Opopanax mucilage and gelatin containing zinc oxide nanoparticles enriched by peppermint (Mentha piperita L) essential oil on the microbial and sensory properties characteristics of rainbow trout (Oncorhynchus mykiss)
Mohammad Javad Rashidi leila Roozbeh nasiraie Shahin Zomorodi Sara JafarianConsidering the possible adverse effects on the sensory properties of food due to the use of essential oils in effective concentrations for antimicrobial and antioxidant activity, the use of combined methods can be effective. In this study, the effect of coating combina MoreConsidering the possible adverse effects on the sensory properties of food due to the use of essential oils in effective concentrations for antimicrobial and antioxidant activity, the use of combined methods can be effective. In this study, the effect of coating combination of gelatin and Opopanax mucilage containing 0.5% zinc oxide nanoparticles, enriched by concentrations of 0, 1.2, 1.6, and 2.0 % of peppermint essential oil and modified atmospheric packaging (MAP) on preventing the growth of microbial population rainbow trout fillets were evaluated during 20 days of storage in the refrigerator. The results showed that in all treatments the number of aerobic mesophilic bacteria, psychrotrophs, lactic acid bacteria, and coliforms as well as pH increased during the storage period but decreased by increasing peppermint essential oil (p<0.05). Also, the microbial load in treatments with a coating containing nanoparticles and MAP was significantly lower than in the control sample (p<0.05). The results of sensory evaluation also showed that the odor and color scores of the samples decreased during storage, which was the highest in the control and the lowest in the NPEO3 treatment (p<0.05). The results of the sensory evaluation were consistent with the results of microbial analysis. According to the results obtained in this study, using the mixture of 0.5 % zinc oxide nanoparticles and 50% peppermint essential oil in edible coating composed of Opopanax mucilage and gelatin for increasing the shelf life of rainbow trout fillet up to the 15th day is recommended. Manuscript profile -
Open Access Article
185 - Effects of selenium nanoparticles and sodium selenite on expression of adiponectin gene in placenta of pregnant ewes.
Pedram Moayeri Gholam ali Kojouri Afshin Jafari dehkordi Ali mohammad Ahadi Mahsa AbolfazlzadehIn recent years, special attention has been paid to insulin resistance mediators, such as adiponectin, that is produced and expressed during conception in placental tissue, thereby inducing its effects on the growing embryo and the health of the mother.In this study, th MoreIn recent years, special attention has been paid to insulin resistance mediators, such as adiponectin, that is produced and expressed during conception in placental tissue, thereby inducing its effects on the growing embryo and the health of the mother.In this study, the effect of selenium nanoparticles and sodium selenite on transcription of placental adiponectin gene was investigated for the first time during the transitional period. For this purpose, 20 pregnant ewes were selected randomly. During the 10 days leading up to birth, oral administration of selenium nanoparticles (Se NPs) with dosages of 0.05 and 0.10 mg/kg B.W. and sodium selenite with dosage of 0.1 mg/kg B.W. was performed. At the same time, the control group received equal volume of distilled water. At parturition, placental samples were collected and the transcription rate of adiponectin gene was determined by using RT-PCR based on a comparison assay of 2-ΔΔCt.The results showed that selenium supplementation in pregnant ewes leads to a significant reduction in adiponectin gene transcription rate and the suppressive role of selenium nanoparticles was significantly superior to sodium selenite. Manuscript profile -
Open Access Article
186 - Effects of selenium nanoparticles on stearoyl-CoA desaturase gene transcription rate in adipose tissue of prepubertal male lambs
Hamid Esmaeeli Najafabadi Gholamali Kojouri Ali mohammad AhadiSelenium plays a crucial role in the formation of selenoprotein and hormones. The stearoyl-CoA desaturase enzyme (SCD) is present in many tissues of the body and its activity leads to the formation of a single-stranded fatty acid from saturated fatty acids. The present MoreSelenium plays a crucial role in the formation of selenoprotein and hormones. The stearoyl-CoA desaturase enzyme (SCD) is present in many tissues of the body and its activity leads to the formation of a single-stranded fatty acid from saturated fatty acids. The present study was carried out on fat tail weaning male lambs to evaluate the effect of oral selenium nanoparticles administration on tail fat transcription rate of stearoyl-CoA desaturase enzyme. For this purpose, 14 male lambs were selected at weaning time and divided into three groups: treatment 1 (5 lambs), treatment 2 (5 lambs) and control (4 lambs). Selenium nanoparticles were administered for 20 consecutive days at a dose of 0.05 and 0.1 mg/kg to treatment groups 1 and 2, respectively and distilled water to the control ones. Tail fat tissue samples were collected at days 0, 20 and 30 via core biopsy needle. Transcription rate of stearoyl-CoA desaturase (SCD) enzyme gene was determined by RT-PCR method and data were analyzed statistically using ANOVA test at the level of p < /em> Manuscript profile -
Open Access Article
187 - The effect of prebiotic pretreatment on histological lesions of Nile tilapia fry (Oreochromis niloticus) exposed to silver nanoparticles
farahnaz kakavand Aliakbar Hedayati maryam rezaei shadegan ali jafar nodeh saeed maddahThe presence of emerging nanoparticle contaminants in aquatic environments reduces the safety performance of aquatic animals, so the use of safety stimuli is essential. The aim of the present study was to investigate the effect of different prebiotic levels of oyster mu MoreThe presence of emerging nanoparticle contaminants in aquatic environments reduces the safety performance of aquatic animals, so the use of safety stimuli is essential. The aim of the present study was to investigate the effect of different prebiotic levels of oyster mushrooms (Pleurotus ostreatus) on tissue damage in the liver and gills of tilapia exposed to silver nanoparticles. For this purpose, 120 juveniles of Tilapia (Oreochromis niloticus) were divided into 4 experimental groups with 3 replicates and bred for 42 days including treatment 1 as control (fed with diet without probiotic) and treatments 2-4, fed with diet containing 0.05%, 0.1% and 0.2% prebiotics, then 5 ppm of silver nanoparticles were added to the culture medium of each treatment for 16 days. At the end of the experimental period, fish were anesthetized with clove anesthetic solution (220 mg/L) and their liver and gill tissues were isolated for histological studies. Treatments exposed to silver nanoparticles showed extensive complications in gill tissue as well as severe injuries and bile stasis in liver tissue. However, the use of mushroom prebiotics was able to reduce the destructive effects of silver nanoparticles on these tissues. Overall, the results indicated that treatment with 0.2% of prebiotics in the diet could have the best protective effect on tissue damage in the liver and gills of tilapia exposed to silver nanoparticles. Manuscript profile -
Open Access Article
188 - Effect of magnesium oxide nanoparticles on varicocele-induced testicular damage in male Wistar rats
Masoumeh Tolu Ghamari Akram Eidi Pejman Mortazavi Ahmad AsghariVaricocele is a pathological dilation of the venous network of the spermatic cord and considering that magnesium oxide nanoparticles play a key role in various physiological functions, the aim of this study was to evaluate the performance of nanoparticles on sperm chara MoreVaricocele is a pathological dilation of the venous network of the spermatic cord and considering that magnesium oxide nanoparticles play a key role in various physiological functions, the aim of this study was to evaluate the performance of nanoparticles on sperm characteristics affected by experimental varicocele. A total of 54 male Wistar rats were randomly divided into 9 equal groups including healthy control group (untouched animals), sham-operated group (underwent sham surgery), three healthy experimental groups (animals in these groups received magnesium oxide nanoparticles at doses of 1.25, 2.5 and 5 mg/kg respectively by gavage for 6 weeks), varicocele control group (varicocele was induced by renal vein ligation) and three experimental varicocele groups (in addition to varicocele induction, magnesium oxide nanoparticles were given at doses of 1.25, 2.5 and 5 mg/kg respectively by gavage for 6 weeks). At the end of the 6th week, the abdomen was opened and semen samples were collected from the tail of the epididymis to determine the indices of concentration, survival and motility of sperm and the data were statistically analyzed (p<0.05). The results showed that magnesium oxide nanoparticles were able to significantly increase the concentration, viability, progressive, moderate and non-progressive movements of sperm compared to the varicocele group (p<0.001) and also caused a significant decrease (p<0.001) in the number of non-moving sperms in the varicocele experimental groups. Therefore, magnesium oxide nanoparticles may possibly reduce the destructive effects of varicocele due to their antioxidant activity and be effective in its treatment by improving sperm properties during varicocele. Manuscript profile -
Open Access Article
189 - Antibacterial effects of cadmium sulfide nanoparticles producing by two methods of chemical precipitation and microwave on Escherichia coli isolates from poultry
Zahra Mohamdi Golafshan Jalal Shayegh Shahin TofangdarzadehPoultry colibacillosis causes several diseases that can cause great economic damage to poultry herds. Escherichia coli (E. coli) is a prominent member of this family, is known as one of the bacteria that pollutes the environment. Today, antibiotics and disinfectants are MorePoultry colibacillosis causes several diseases that can cause great economic damage to poultry herds. Escherichia coli (E. coli) is a prominent member of this family, is known as one of the bacteria that pollutes the environment. Today, antibiotics and disinfectants are used to prevent a variety of diseases. However, due to inappropriate consumption, as well as incomplete duration of treatment, antibiotic-resistant bacteria have emerged. Due to their small size and high surface-to-volume ratio, nanoparticles have particle inhibitory properties and therefore have many cell-killing effects that can be used as antibacterial, fungal and viral agents. In this study, the antibacterial effects of cadmium sulfide nanoparticles were investigated by chemical and microwave precipitation methods in Escherichia coli bacteria isolated from poultry. For this purpose, Escherichia coli bacterial samples were collected from poultry clinics in Tabriz in May and June 2016 .Synthesized cadmium sulfide nanoparticles and Identified by XRD, UV and SEM analysis were exposed to cultured E. coli by both precipitation and microwave methods. Results were determined based on the minimum amount of MBC bactericidal and the minimum inhibitory concentration of MIC. The MIC was 1.653% and the MBC was 2.051%, the MIC was 2.051% and the MBC was 1.653%. The results of this study showed that cadmium sulfide nanoparticles have good antimicrobial effects on Escherichia coli; however, no significant difference was observed between the synthesis method of these nanoparticles for bactericidal and bacteriostatic effects. Manuscript profile -
Open Access Article
190 - Effects of silver nanoparticles synthesized through chemical reduction on plasma superoxide dismutase and glutathione peroxidase enzymes in rat model
elham ghavidelaghdam mohamad narimanirad alireza lotfiAbstract With possibility of synthesis of silver nanoparticles in citrate-coated form and via chemical method, the aim of this study was synthesis of silver nanoparticles by chemical reduction method and investigation of the impact of nanoparticles on super MoreAbstract With possibility of synthesis of silver nanoparticles in citrate-coated form and via chemical method, the aim of this study was synthesis of silver nanoparticles by chemical reduction method and investigation of the impact of nanoparticles on superoxide dismutase and glutathione peroxidase enzymes in an animal model. Silver nanoparticles were synthesized by chemical reduction with a mixture of distilled water and sodium borohydrate and adding silver nitrate and sodium citrate to the obtained solution. In vivo study was conducted using 40 adult male rats with an average weight of 100 grams. Animals were divided into four groups, as control, placebo, and treatment groups receiving silver nanoparticle solutions (100 and 200 mg/kg, respectively). The treatment groups received silver nanoparticle solutions (100 and 200 mg/kg) on the first and the seventh days of experiment intraperitoneally. Oxidative effects of injected high concentrations of silver nanoparticles (200 mg/kg) lead to mortality in the experimental animals. Infusion of silver nanoparticles at concentrations of 100 and 200 milligrams per kilogram of body weight decreased the activity of plasma superoxide dismutase (SOD) and glutathione peroxidase (GPx). This reduction was significantly higher (p<0.01) at the dose of 200 mg/kg. In conclusion, studies on animal models showed that the concentrations of 100 and 200 milligrams per kilogram of body weight of silver nanoparticles synthesized by chemical reduction method decreases the activity of antioxidant enzymes, eventually leading to mortality. Manuscript profile -
Open Access Article
191 - The comparative effect of selenium nanoparticles and sodium selenite supplementation in transitional period on serum thyroxin level of neonatal lambs
Vahid Tabatabaei Gholamali Kojouri Afshin Jafari Abdonaser MohebiThe objective of the present study was to study the comparative effect of administering selenium nanoparticles and sodium selenite in pregnant ewes on the blood serum levels of thyroxin in newly born lambs. For this purpose, twenty, four-month pregnant ewes within the s MoreThe objective of the present study was to study the comparative effect of administering selenium nanoparticles and sodium selenite in pregnant ewes on the blood serum levels of thyroxin in newly born lambs. For this purpose, twenty, four-month pregnant ewes within the same age were used. During the 21 days leading up to birth, supplementation of selenium nanoparticles (Se NPs) with dosages of 0.05 and 0.10 mg/kg B.W. were respectively fed to treatment groups 1 and 2. And supplementation with sodium selenite with dosage of 0.1 mg/kg B.W. was fed to treatment group 3. At the same time the control group was fed distilled water in equal volume. The ewes were monitored under accurate laboratory and clinical examination until the time of delivery. Neonatal lamb serum thyroxin level was measured at the day zero (birth day) and also at the 7th day. The results indicated that serum thyroxin level of neonatal lambs of treated groups 1 and 3, decreased significantly at 7 days' age in comparison to the birth day (p values less than 0.006 and 0.001, respectively). Results also showed that serum thyroxin level of group 2 offspring lambs on the day 0 was significantly less than that in group 1 (p=0.003). It was concluded that the physiological function of selenium nanoparticles was dose dependent, and the 0.05 mg/kg B.W. dosage of Se NPs induced similar effects like 0.1 mg/Kg B.W. of sodium selenite, which resulted in increasing serum level of thyroxin at the day of birth. Conflict of interest: None declared. Manuscript profile -
Open Access Article
192 - Antibacterial effects of green laser in vicinity of silver nanoparticles on methicillin-resistant staphylococcus aureus (MRSA)
Maliheh Ranjbaran Zahra Aghaebrahimi Jamshid Sabaghzadeh zohreh daraeizadeh arash abednezhad -
Open Access Article
193 - New-generation of PDMS-based Lenses for Color Blindness management
Seyedeh Mehri Hamidi neda Roostaei -
Open Access Article
194 - Effect of Protein Corona Formation on Photonic Response of Upconverting Nanoparticles
Nahid Ghazyani Mohammad Hossien Majles Ara -
Open Access Article
195 - Fluence and wavelength optimization of pulsed laser in photothermal therapy
Rasoul Malekfar Neda Amjadi -
Open Access Article
196 - Reduced Biofilm Formation of Pseudomonas Aeruginosa by Silver Modified Iron Oxide
Davoud kabudanian Raheleh Safaei javan Shohreh Zare karizi -
Open Access Article
197 - Electrochemical properties of iron oxide nanoparticles as an anode for Li-ion batteries
Mohammad Golmohammad Farhad Golestanifard Alireza Mirhabibi -
Open Access Article
198 - Green Synthesis of Nanoceria (CeO2) and Evaluation of Enzyme like Characteristics
Azize Alayli Gungor Hayrunnisa Nadaroglu Aynur Babagil Hicran Onem -
Open Access Article
199 - Amelioration of the acid blue oxidation process by as-synthesized ZnO nanoparticles: Optimization of the dye and photocatalyst concentration together with the pH of the solution
Mehrnaz Gharagozloua Sanaz Naghibi Mohammad Ebrahim Olya -
Open Access Article
200 - Characterization of nanostructured SnO2 thin film coated by Ag nanoparticles
Monireh Ganjali Mansoureh Ganjali Amir Hassanjani-Roshan Seyed Mohammad Kazemzadeh -
Open Access Article
201 - Chemical synthesis and characterization of Zn-doped cadmium oxide based nanoparticles: As nanofluids for thermophysical applications
M Sheela Pauline W A Samson Nesaraj -
Open Access Article
202 - Solvothermal synthesis of copper nanoparticles loaded on multi-wall carbon nanotubes as catalyst for thermal decomposition of ammonium perchlorate
Hassan Tavakoli Rasoul Sarraf-Mamoory Alireza zarei -
Open Access Article
203 - Effect of TiO2 nanoparticles on the bond strength of CP Ti sheet by cold Rolling method
Javad Moradgholi Amad Monshi Khosro Farmanesh -
Open Access Article
204 - Processing of aluminum flake powder via high energy ball milling under different conditions reaching to aluminum nanoparticles
mohamed saad iman ghoneim Al-Sayed Al-Sherbini -
Open Access Article
205 - Polyethylene Glycol Coated NiFe2O4 Nanoparticles Produced by Solution Plasma Method for Biomedical Applications
Masoud Shabani Ehsan Saebnoori Ali Hassanzadeh-Tabrizi Hamid Reza Bakhsheshi-Rad -
Open Access Article
206 - A New Classical-Quantum Model for Comparing the Magnetization of Ferromagnetic and Superparamagnetic Nanoparticles During Magnetic Hyperthermia
Maryam Bahmanpour Hamid Ghayour -
Open Access Article
207 - A Biosensor for the Detection of Type b3a2 Related to Chronic Myelogenous Leukemia by Using Locked Nucleic Acid, Molecular Switching, Magnetic Nanoparticles, and Enzymatic Signal Amplification
Hamzeh Amoshahi Mohammad Reza Mohammad Shafiee Shabnam Kermani Mehrosadat Mirmohammadi -
Open Access Article
208 - Fabrication of Silver Oxide and Nickel Oxide Nanoparticles by Green Synthesis Method Using Malva Sylvestris Plant Extract
Azam Beheshtian Mohammad Hadi Givianrad Hossain-Ali Rafiee-Pour Parviz Aberoomand Azar -
Open Access Article
209 - Effects of nanoclay particles contained-acrylic resin and plant mulch on morphological characteristics of pistachio (Pistaciavera L.) in Gorpan rangeland, Esfarāyen
paria kamali gholamali heshmati Adel sepehri shervin ahmadiWater scarcity issue and itscomplexity is found to be one of the problems in Iran. On the other hand, farming fruits species in the form of a rangeland project for resident nomads can be one of the solutions to livelihood of this group of stakeholders as well as to redu MoreWater scarcity issue and itscomplexity is found to be one of the problems in Iran. On the other hand, farming fruits species in the form of a rangeland project for resident nomads can be one of the solutions to livelihood of this group of stakeholders as well as to reduce the number of livestock in the natural resource and rangelands. The present research shed lights on effect of mixing acrylic resin and nanoclay particle as a mulch on moisture absorption and retention as well as its impact on establishment of pistachio.Treatments include controls, plant mulch (rain-fed wheat straw) and polymer nano-composite 0%, 1% and 3% nanoclay - acrylic resin with 10 replicates for each treatment. Pistachio morphological traits (plant height, canopy area and number of leaves) were measured after one year after planting.Data analysis was performed using ANOVA and Duncan. The results showed no significant difference between treatments straw to control (at probability level of 5%) but other treatments (at probability level of 1%) had significant difference with control.All treatments treatment had significant difference to 3% nano-clay particles of acrylic resin so that the plant height, canopy area and number of leaves in treatment 3% nano-clay, acrylic resins were higher than other treatments. Manuscript profile -
Open Access Article
210 - Evaluation of the effect of foliar and soil application of zinc and silicon nanoparticles on some physiological traits of rice (Oryza sativa L.)
norollah kheyri Hossein Ajam Norouzi Hamid Reza Mobasser Benjamin TorabiTo evaluate the effect of various application methods of zinc (Zn) and silicon (Si) on some physiological traits of rice (cv. Tarom Hashemi), a field experiment was carried out as factorial based on randomized complete block design with 16 treatments and three replicati MoreTo evaluate the effect of various application methods of zinc (Zn) and silicon (Si) on some physiological traits of rice (cv. Tarom Hashemi), a field experiment was carried out as factorial based on randomized complete block design with 16 treatments and three replications in Nour in 2016. The experimental treatments included T1: Control, T2: Calcium silicate soil application, T3: Zinc sulfate soil application, T4: Calcium silicate + Zinc sulfate, T5: Nano-Si foliar application, T6: Nano-Si + Calcium silicate, T7: Nano-Si + Zinc sulfate, T8: Nano-Si + Calcium silicate + Zinc sulfate, T9: Nano-Zn oxide foliar application, T10: Nano-Zn oxide + Calcium silicate, T11: Nano-Zn oxide + Zinc sulfate, T12: Nano-Zn oxide + Calcium silicate + Zinc sulfate, T13: Nano-Si + Nano-Zn oxide, T14: Nano-Si + Nano-Zn oxide + Calcium silicate, T15: Nano-Si + Nano-Zn oxide + Zinc sulfate and T16: Nano-Si + Nano-Zn oxide + Calcium silicate + Zinc sulfate. Results showed that straw protein, zinc and silicon in grain and straw were affected by experimental treatments, but the evaluated treatments showed no significant effect on grain protein and chlorophyll content of flag leaf. Among evaluated treatments, the combined application of silicon and zinc improved nutrient absorption compared to separate application of each element and control. This indicates the aggregation of Zn and Si compounds and their synergistic effects. Combined application of silicon and zinc by both methods of NP foliar application and soil application (T16) improved nutrients uptake in grain and straw of rice, but among the methods used, the NP foliar application had a more positive effects in improving physiological characteristics of rice plants than the treatments of soil application of elements. Manuscript profile -
Open Access Article
211 - Effect of different concentrations of beta-cyclodextrin nanoparticles on growth indexes and enzymatic defense systems, Ion leakage and amount of membrane lipid peroxidation in basil medicinal plant (Ocimum basilicum L. c.v. keshkeni luvelou)
azadeh loni Sara Saadatmand Hossein Lari Yazdi Alireza IranbakhshBy nanotechnology entrance into the field of medicinal plants, the agricultural industry and food industry ensures an increase in the amount and quality of their products, along with the preservation of the environment. The properties of materials are changed by changin MoreBy nanotechnology entrance into the field of medicinal plants, the agricultural industry and food industry ensures an increase in the amount and quality of their products, along with the preservation of the environment. The properties of materials are changed by changing their size to nano. The use of beta-cyclodextrin nanoparticles is described as a new protection strategy of the plant and induces a plant defense response. For this purpose, to study the effect of beta-cyclodextrin nanoparticles on the physiologic indexes and biochemical activities in basil of keshkeni luvelou cultivar, an experiment was performed based on a completely randomized design with four replications at four levels of 0.10, 50, 100mg/l in the greenhouse. The results showed that different growth indices such as root and stem length and diameter, fresh and dry weight of roots, shoots, and leaf area increased by 5% compared to the control and the highest increase was reported at 50ppm. Data analysis showed that the effect of different treatments on the activity of superoxide dismutase and catalase, peroxidase enzymes, malondialdehyde content, and ion leakage of roots and leaves were significantly increased (P≤5%) compared to the control. Membrane stability index was assessed by measuring the electrolyte leakage of leaves and roots. A significant reduction (P≤5%) of ion leakage and malondialdehyde of roots and leaves was observed in the treatment of 50mg/l nano-beta cyclodextrin which indicates an increase in enzyme activity. With the entrance of nanoparticles into agriculture can minimize the scope of chemical control and disruption of environmental physiological practices. The trend of changes in physiological and biochemical parameters studied in the present study are relatively reliable indicators to introduce the best concentration of beta-cyclodextrin nanoparticles for basil. Manuscript profile -
Open Access Article
212 - Effects of jasmonic acid and titanium dioxide nanoparticles on process of changes of phytochemical and antioxidant in genotypes of Satureja hortensis L.
Azar Davari Mamoud Solouki Bahman Fazeli-NasabIn this research to evaluate the effect of sprying of titanium dioxide nanoparticles (0, 30, 60 and 90 mg/l) and jasmonic acid (0, 50, 100 and 150 mM) on enzymatic and non-enzymatic antioxidants As well as physiological traits 5 genotype of Satureja hortensis L. factori MoreIn this research to evaluate the effect of sprying of titanium dioxide nanoparticles (0, 30, 60 and 90 mg/l) and jasmonic acid (0, 50, 100 and 150 mM) on enzymatic and non-enzymatic antioxidants As well as physiological traits 5 genotype of Satureja hortensis L. factorial experiment in a completely randomized design with three replications. Treatments were conducted at four leaf stage on the aerial parts of the plants and then were harvested 48 hours after spraying. At first were extracted from shoots and then all traits; enzymatic and non-enzymatic antioxidants and physiological traits were measured by using a spectrophotometer. Analysis of variance showed that the interaction of spraying different concentrations of titanium dioxide nanoparticles and jasmonic acid, catalase, peroxidase, polyphenol oxidase, ascorbate peroxidase, total protein, flavonoids, anthocyanins and total phenolics were significant at the 1% level. The highest catalase (0.0536 mg per gram of fresh weight) at doses of 30 mg per liter in Tabriz plant genotype nanoparticles of titanium dioxide and 150 mMjasmonic acid per liter;Most of ascorbate peroxidase (0.0514 mg per gram of fresh weight) in plant genotypes in concentrations of 60 mg per liter Ardestān nanoparticles of titanium dioxide and 50 mMjasmonic acid;Most peroxidase activity (0.000494 mg per gram of fresh weight) at a concentration of 60 mg per liter in genotype Savory Ardestān nanoparticles of titanium dioxide and 150 mMjasmonic acid; The highest polyphenol oxidase (0.0628 mg per gram of fresh weight) in Tabriz genotypes in treatments of 30 mg of nanoparticles of titanium dioxide and zero (control) M jasmonic acid was obtained.Savory population most effective physiological traits, Savory Rey, the antioxidant enzyme, Savory Ardestan and Tabriz and the non-enzymatic antioxidants (anthocyanins, phenols and flavonoids) Savory Mashhad. The results of this study showed that nano-titanium and jasmonic caused time and non-enzymatic antioxidant and physiological Savory is the most effective hormone levels nanoparticles of titanium, 30 ppm and jasmonic acid was 50 micro molar. Manuscript profile -
Open Access Article
213 - Optimization, characterization and anti microbial activity of gold nano particles biosynthesized using aqueous extract of Sambucus ebulus L.
omid Azizian Shermeh, O jafar Valizadeh misam Noroozifar ali Ghasemi Moharam ValizadehPlants as stable and available sources to preparation of the biocompatible nano particles that have received much attention in recent years. The aim of this study were optimization and characterization of biosynthesis of gold nano particles (Au NPs) using leaf aqueous e MorePlants as stable and available sources to preparation of the biocompatible nano particles that have received much attention in recent years. The aim of this study were optimization and characterization of biosynthesis of gold nano particles (Au NPs) using leaf aqueous extract of Sambucus ebulus L. After preparing the extract, 2 ml of it, was added to 4 ml of HAuCl4.3H2O with concentration 1 mM, which reduced Au (III) ions to Au NPs, and quickly the color of solution changed to violet. In order to achieve Au NPs with a uniform shape and size, parameters affecting on synthesis such as: pH of the reaction, volume of plant extract, concentration of HAuCl4.3H2O solution, temperature and time of reaction were studied and optimized. All parameters were optimized using UV-Vis spectrophotometry. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were also employed to find characterization of the nanoparticles. Finally, the antibacterial properties of nanoparticles on 4 species of pathogenic bacteria such as: Staphylococcus aureus, Bacillus subtilis, E. coli and Salmonella enteritidis was evaluated by disc diffusion method and was reported as the diameter of inhibition zone. The results showed that the Au NPs showed a maximum absorbance at 534 nm. It was found that biosynthesized of Au NPs have spherical shape with a size between 11-17 nm and the gold nanoparticles have relatively good antibacterial activity against some bacteria. Manuscript profile -
Open Access Article
214 - (Short paper) Potential evaluation of the aqueous extract of Portulaca oleracea L. in the synthesis of Iron oxide nanoparticles
Mina Jamzad Maryam Kamari Bidkorpeh Fereshteh NaderiThe researchers have, recently considered using plants and their active components in the synthesis of metal nanoparticles. In this project, the aerial part of Portulaca oleracea L. (Portulacaceae) before the flowering stage, was collected from Roodsar (Gillan province) MoreThe researchers have, recently considered using plants and their active components in the synthesis of metal nanoparticles. In this project, the aerial part of Portulaca oleracea L. (Portulacaceae) before the flowering stage, was collected from Roodsar (Gillan province) on June 2017 and the aqueous extract was prepared by warm maceration method. Aqueous extract of the aerial parts (leaves and flowers) of the plant and Ferric chloride solution was heated at 70°C for 3.5 h. and Iron oxide nanoparticles with average size of 90 nm were synthesized, by the co-precipitation method. Formation of the Iron oxide nanoparticles was confirmed by Ultraviolet-Visible spectroscopy (UV-Visible), Fourier Transform Infrared Spectroscopy (FT-IR) and X-Ray Diffraction Analysis (XRD) techniques. The absorption peak at 288 nm confirmed the formation of nanoparticles and FT-IR spectra were showed the presence of organic compounds around the nanoparticles. XRD results showed the phase of hematite (α-Fe2O3) for the synthesized nanoparticles. Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX) confirmed the formation and purity of the nanoparticles. TEM image showed that the synthesized Iron oxide nanoparticles have a spheroid/cube geometry. The nanoparticles were stabilized by the organic compounds of the extract and were not agglomerated. These organic compounds can also improve the capacity of the nanoparticles in environmental remediation. Manuscript profile -
Open Access Article
215 - Determine optimal conditions of synthesis of silver green nanoparticles by aqueous extract of Falcaria vulgaris edible- medicinal plant and evaluation of its antioxidant properties
Ghazaleh Kouchakzadeh Zeinab DelfanNowadays, the advent of nanotechnology and the synthesis of nanoparticles have brought many developments to humans, but this technology must be considered in terms of safety. Meanwhile, the synthesis of green nanoparticles has expanded due to more compatibility with the MoreNowadays, the advent of nanotechnology and the synthesis of nanoparticles have brought many developments to humans, but this technology must be considered in terms of safety. Meanwhile, the synthesis of green nanoparticles has expanded due to more compatibility with the environment and that they are low costs and non-toxic, because the plants have a very good ability for reducing the metal ions and synthesizing nanoparticles. In recent research, the optimum conditions for the green synthesis of silver nanoparticles using the extract of Falcaria vulgaris Bernh. and its antioxidant effect were investigated. In this research, first aerial parts of plant were collected plains south of Khorramabad before the flowering stage in May and dried in shaid. After preparing the aqueous extract of plant by soaking, effective parameters of nanoparticles synthesis such as pH, AgNO3 concentration, extract concentration, temperature and time were evaluated. Optimal conditions of silver nanoparticles synthesis by plant are include pH=11, AgNO3 concentration= 8 mM, extract value= 4 cc, temperature= 40̊C and time= 120 minute. The formation of silver nanoparticles was confirmed by the techniques of UV-Vis, X ray diffraction and FT-IR. The study of the morphology of the resulting nanoparticles showed a spherical shape with a particle size of 16-29 nm. Evaluation of antioxidant activity of aqueous extract and synthesizing nanoparticle by conventional DPPH method were carried out. Maximum value of free radical inhibition at 12.5 μl/ml concentration of extract and nanoparticle compared to ascorbic acid was reported. Finally, it can be concluded that the presence of various chemical compounds that have caused the antioxidant activity of the extract expresses the extract and the resulting nanoparticles as a source of natural antioxidants. Manuscript profile -
Open Access Article
216 - Investigation of phytochemical and morphological response of a local Cyamopsis tetragonoloba L. mass to foliar application of zinc oxide nanoparticles
Safoora Bazzi Ali Movafeghi Jafar Valizadeh Moharam ValizadehSince supplementation of plants with zinc is a solution to improve plant growth and compensate for zinc deficiency in soil, in this study to investigate the nutritional effect of 40 nm zinc oxide nanoparticles (ZnO-NPs) on morphological characteristics, seed gum and phy MoreSince supplementation of plants with zinc is a solution to improve plant growth and compensate for zinc deficiency in soil, in this study to investigate the nutritional effect of 40 nm zinc oxide nanoparticles (ZnO-NPs) on morphological characteristics, seed gum and phytochemical products of leaves of a native mass of Cyamopsis tetragonoloba L (Gguar plant) from Iranshahr a completely randomized experiment with three replicates was conducted at the University of Sistan and Baluchestan, Zahedan, Iran in mid-May 2018. Guar gum content, total phenol content and total flavonoid content were determined by the phenol-sulfuric acid, the Folin–Ciocalteu reagent, and colorimetric aluminum chloride methods, respectively. Seed cultivation was carried out in the greenhouse of Sistan and Baluchestan University in early June 2018. The treatments consisted of six different concentrations of ZnO-NPs including 0 (control), 25, 50, 100, 200, and 500 mg L-1 by foliar application of guar plants in two stages (20 and 27 days after sowing seeds). Based on the results, with increasing the concentration of nanoparticles, the number of seeds in pod gradually decreased, but no significant difference was observed in pod length and root length. However, stem length, stem dry weight, root dry weight, leaf area, stomata density, leaf dry weight, 500-seed weight, pod dry weight gradually increased, with the maximum increase observed in the 500 mg L-1 treatment compared to the control. In this treatment, seed gum, total phenol and total flavonoids increased by 2.55, 2.10 and 1.34 times compared to the control treatment, respectively. According to the results, ZnO-NPs nanoparticles with the properties used in this study can be used to improve the growth characteristics and increase the amount of seed gum, phenol and flavonoids of guava leaves and obtain the benefits of their medicinal applications. Manuscript profile -
Open Access Article
217 - Potential applications of Aloe vera L. in the pharmaceutical, cosmetic, health, and food industries - nanoparticle biosynthesis: a comprehensive review
Mohammad Heydari Tayebeh Tabatabaie Fazel Amiri Seyed Enayat HashemiAloe vera L. is one of the oldest and most traditional medicinal plants in history, which is more than a thousand years old. Today, its biological activity is not limited to therapeutic purposes. The expansion of the Aloe vera L. industry became evident during the 90s w MoreAloe vera L. is one of the oldest and most traditional medicinal plants in history, which is more than a thousand years old. Today, its biological activity is not limited to therapeutic purposes. The expansion of the Aloe vera L. industry became evident during the 90s when the development of this product began due to the global demand from consumers for a healthier lifestyle. Considering this plant's relationship with agriculture, industry, and the economy, the present work examined chemical, biological, and nutritional properties of Aloe vera and its processing methods, innovations, and biosynthesis of nanoparticles, and industrial applications. Applications of this plant are detailed in pharmaceutical, cosmetic, and food industries, and the global vision of the million-dollar market around this product is discussed. Also, the biosynthesis method of nanoparticles using Aloe vera L. as a reducing agent is presented. Aloe vera L. has been used to produce nanomaterial through biosynthesis. This plant has many unique properties and is known for its antioxidant, anti-inflammatory, anti-diabetic, sunburn relief, immune system strengthening, anti-aging, and anti-cancer properties. The study concludes that biosynthesized nanoparticles with Aloe vera L. are environmentally friendly, simple, economical, and safe. Manuscript profile -
Open Access Article
218 - Study of the effect of the chitosan and chitosan nanoparticles on some physiological and phytochemical features of Nigella sativa L.
Farahnaz Mahdipour sara saadatmand Alireza Iranbakhsh Bahare Norozi zahra Oraghi ArdebiliBlack cumin (Nigella sativa L.) from the Ranunculaceae family is considered one of the best sources of natural antioxidants. Due to the positive effect of chitosan on various medicinal plants, in this study we investigated the vegetative and chemical performance of this MoreBlack cumin (Nigella sativa L.) from the Ranunculaceae family is considered one of the best sources of natural antioxidants. Due to the positive effect of chitosan on various medicinal plants, in this study we investigated the vegetative and chemical performance of this plant under the treatment of chitosan nanoparticles. Experimental factors included solubilization of chitosan and its nanoparticles with concentrations of 0.01, 0.05, 0.2, 1, 4 (pH 5) percent. Assays were performed on the seed and leaf extracts of the treated plant at Razi Laboratory of Azad University, Science and Research Branch of Tehran in 2021. Extraction was done by cold pressing method. Some traits such as germination (number, percentage, index and germination rate), growth parameters (radicle and plumule length, fresh radicle and plumule weight and radicle and plumule dry weight), pigments, total leaf phenol content (Folin-Ciocalteau) total leaf flavonoids (aluminum chloride colorimetric assay), leaf antioxidant activity (DPPH), leaf membrane lipid peroxidation (MDA concentration) and soluble protein content Seeds and leaves (Bradford) were evaluated. The experiment was conducted as a completely randomized design with 3 replications and the comparison of data means was performed using Duncan's test at a probability level of 5%. The results showed that the treatment percentages had a significant effect on all evaluated traits (except the fresh weight of the radicle). Treatment of 1% and 0.01% of chitosan nanoparticles increased the growth and germination parameters. In addition, the amount of phenol, flavonoids and antioxidant activity increased compared to the control showed that the highest increase was observed in concentrations of 1% and 0.01% chitosan nanoparticles. The maximum increase in the amount of pigments was due to the concentration of 1% and 0.2% of chitosan nanoparticles. Both treatments at a concentration of 1% reduced the amount of MDA compared to the control. The amount of total protein in leaves and seeds decreased under the influence of the treatments .In general, it was concluded that the treatment of chitosan nanoparticles as a bio stimulant has a positive effect on improving the quality characteristics of black seed and they are also suggested as a suitable stimulus to increase growth. Manuscript profile -
Open Access Article
219 - Investiganting the effect of methyl jasmonate and titanium dioxide nanoparticles on physiological and phytochemical variations of Rosa damascena. Mill. esential oil
Zahra Allahverdi Mehrab Yadegari Mohammad MoghaddamRosa damascena Mill. belongs to Rosaceae family and is considered as one of the most important medicinal and industrial plant. In the present study, the effects of foliar application of methyl jasmonate and titanium dioxide nanoparticles were investigated on physiologic MoreRosa damascena Mill. belongs to Rosaceae family and is considered as one of the most important medicinal and industrial plant. In the present study, the effects of foliar application of methyl jasmonate and titanium dioxide nanoparticles were investigated on physiological and phytochemical traits of Rosa damascena Mill. in two separate experiments based on a randomized complete block design with 3 replications in Farsan during two growing seasons (2019 and 2020). Foliar application of methyl jasmonate (0, 0.5, 1, and 2 mM) and titanium dioxide nanoparticles (0, 100, 200, and 300 mg L-1) was performed three times with 4-day intervals before the flowering stage. Essential oil extraction was done by steam distillation (a clevenger apparatus), phytochemical evaluation was performed using spectrophotometric method, and antioxidant performance was evaluated through DPPH test. Results showed that foliar application of elicitors increased dry weight of leaves and photosynthetic pigments. The phenolic compounds of leaves and petals of R. damascena Mill. also increased in response to applied elicitors and the highest increment was observed in plants treated with 1 mM methyl jasmonate and 100 mg L-1 titanium dioxide nanoparticles. Also the results showed the positive effect of applied treatments on increasing macro (N, P, K and Mg) and micro elements (Fe, Mn, and Zn) in leaves of damask rose. Methyl jasmonate (0.5-1 mM) increased the essential oil content of the treated plants by 34.32%. According to the obtained results, methyl jasmonate applied at concentration of 1 mM is suggested to improve the physiological and phytochemical characteristics of the R. damascena plants. Manuscript profile -
Open Access Article
220 - Nano Analysis in Biochemistry: In Vitro Separation and Determination of Aluminium in Blood of Dialysis Patients Based on Graphene Oxide Nanoparticles Dispersed to Ionic Liquid
Farnaz Hosseini Hamid Shirkhanloo Negar Motakef Kazemi -
Open Access Article
221 - Biogenic Synthesis of Silver Nanoparticles Using Fruit Aqueous Extract of Psidium Guajava and Its Antibacterial Activity
Babak Sadeghi Bita Koupaei -
Open Access Article
222 - Esterification of Waste Cooking Oil Followed by Transesterification by CaO Nanoparticles: Application of Taguchi Methodology
Ali Shokuhi Rad Poyesh Mehdipour Ali Vaziri Ali Mirabi Ehsan Binaeian -
Open Access Article
223 - Exploring the cytotoxicity of CeO2 nanoparticles: A compendious approach
Zahra Yaghoobi Vishnu Sankar Nooshin Amini Abbas RahdarMetal oxide nanoparticles due to their antioxidant properties have attracted significant attention and exhibited good potential for use in cancer theranostics. Owing to the poor absorption in the physiological environment, they are an ideal candidate to act as nanocarri MoreMetal oxide nanoparticles due to their antioxidant properties have attracted significant attention and exhibited good potential for use in cancer theranostics. Owing to the poor absorption in the physiological environment, they are an ideal candidate to act as nanocarriers in targeted drug delivery and bioimaging. This feature can be successfully implemented in live monitoring and imaging applications, which offer the possibilities and scope for optical, magnetic resonance, and nuclear imaging. The environment of malignant cells like the rapid proliferation of cells, specific antigen expressions, and leaky tumor vasculature can be used by the modifications in their morphology and surface functionalization. Ceria (CeO2) nanoparticles have been fascinating in this regard. Different properties such as size, agglomeration behavior, and surface charge density facilitate the interaction of nanoparticles with cancer cells. Compared to other nanoparticles, CeO2 nanoparticles have a potential for pharmaceutical use since they can act as a therapeutic agent in different disorders such as cancer, inflammation, and neurodegeneration, due to the ability to exhibit variable oxidation state at the nanoparticle surface. Recent literature reports the eco-friendly or ‘green’ synthesis of CeO2 nanoparticles in which the biological agent acts as stabilizers for a cost-effective and feasible mode of preparation. In this review, we focus on recent literature on CeO2 nanoparticles with an emphasis on the methods of fabrication and biomedical applications. Manuscript profile -
Open Access Article
224 - AB INITIO MATERIAL MODELING STUDY ON LiO ADSORBED BY PALLADIUM-COBALT (PdCo) NANOPARTICLES
mikail aslanPdCo nanoalloy particles have been commonly used as catalytic material in some important chemical reactions, involving in fisher-tropsch reactions, and oxygen reduction reactions. In terms of understanding the role of catalysis, these smallest bimetallic nanoparticles p MorePdCo nanoalloy particles have been commonly used as catalytic material in some important chemical reactions, involving in fisher-tropsch reactions, and oxygen reduction reactions. In terms of understanding the role of catalysis, these smallest bimetallic nanoparticles provide the simplest prototypes of Pd-Co bimetallic catalysts for different compositions. In this study, the effect of LixO (x=1,2) on PdCo nanoalloys has been investigated comprehensively employing the density functional theory (DFT) to identify the mechanism of structural, electronic, and energetic properties of the studied species. Binding energies are calculated for stability analysis which is very important for nanoparticles. Results show that lithium oxides are generally adsorbed by cobalt sites on the Pd-Co substrate. This is important for determining active sites of the catalytic material. Furthermore, the structures have low symmetric properties. Hence, this study might provide an initial structural evaluation step for future studies related to the possible new catalytic material of Li-air batteries. Manuscript profile -
Open Access Article
225 - Evaluation of Antibacterial Effect of Zinc Oxide Nanoparticles Synthesized by Wet-chemically Method on Multidrug-resistant Uropathogenic Bacteria
Maryam Bagheri Mohammad Gholipour Monir Doudi Ali Mohammad Ahadi Gholam Reza AmiriZinc oxide (ZnO) nanoparticles have been attracted for their antibacterial effects along with their safety, suitable physicochemical properties, and cost effectivity. The aim of this study was to synthesize ZnO nanoparticles and investigate their antibacterial effects o MoreZinc oxide (ZnO) nanoparticles have been attracted for their antibacterial effects along with their safety, suitable physicochemical properties, and cost effectivity. The aim of this study was to synthesize ZnO nanoparticles and investigate their antibacterial effects on multidrug resistant (MDR) uropathogenic bacteria. ZnO nanoparticles were constructed by wet chemical method with inhibitor. Structural and optical evaluation of zinc oxide nanoparticles was performed by Ultraviolet absorption spectroscopy, X-ray diffraction (XRD), and Tunneling microscopy. Uropathogenic bacteria were isolated from the patient’s pediatric urine and identified through biochemical testing. Antibiotic resistance pattern of the isolates was determined by disk diffusion method and the antibacterial activity of ZnO nanoparticles was detected by pour plate method at the concentrations of 0.0125, 0.025, 0.05, 0.1, 0.2, 0.4, and 0.8 g/l. The produced ZnO nanoparticles had a hexagonal shape with the crystal size of 15 nm and an optical size of 3 nm. The minimum effective concentration of these nanoparticles that inhibited the bacterial growth was 0.05 g/l. E.coli was generally found to be the most frequent cause of UTI in children in Isfahan, in the center of iran, with the mean prevalence of 64%. Most cases of resistance were related to Ampicillin, Amoxicillin, Tetracycline and the highest sensitivity was related to Chloramphenicol, Gentamicin, Trimethoprim/Sulfamethoxazol. The results of the present study, in accordance to the previously approved safe characteristics of ZnO nanoparticles, concentration of 0.05 g/l is proposed to be evaluated for in vivo usage for treatment of urinary tract infections. Manuscript profile -
Open Access Article
226 - Preparation and Characterization of Silica Coated Magnetic Cu Based MOF as a Nanocarrier for Gradual Release of the Capecitabine Anticancer Drug
Azar Asgari Pari Susan Samadi Mohammad Reza__Allahgholi__Ghasri Mohammad Reza__Allahgholi__Ghasri Maryam Torbati Mohammad YousefiThis study developed a novel silica-coated magnetic nanoparticle (Fe3O4@SiO2@Cu BTC) based on a metal-organic framework (MOF) for targeted anticancer medication delivery. Using a co-precipitation method, the Fe3O4@SiO2 core was coated with Cu(OH)2 shell, which was then MoreThis study developed a novel silica-coated magnetic nanoparticle (Fe3O4@SiO2@Cu BTC) based on a metal-organic framework (MOF) for targeted anticancer medication delivery. Using a co-precipitation method, the Fe3O4@SiO2 core was coated with Cu(OH)2 shell, which was then converted to CuBTC in a hydroethanolic mixture. Finally, a post-synthetic approach was used to manufacture a 3-(mercaptopropyl) trimethoxysilane functionalized Fe3O4@SiO2@Cu BTC nanocomposite. The resulting material is characterized using SEM-EDX, TEM, VSM, XRD, TGA, BET, UV–Vis, and FTIR techniques. TEM and SEM micrographs confirmed the core-shell structure. The resulting nanocomposite has high thermal stability, according to TGA findings. Because of their great biocompatibility and drug loading capability, coated Fe3O4@SiO2@Cu BTC nanoparticles might be perfect for drug delivery. Capecitabine (CAP), an anticancer medication, was successfully dispersed through MOF pores. The acquired data revealed that 91 percent of the CAP was adsorbed on the constructed framework, and that the release of capecitabine in PBS buffer solution (pH 5.7) at 37 °C took up to 60 hours to complete. The findings show that nano-sized MOFs-based magnetic NPs with high drug loading and acceptable biocompatibility are viable options for targeted drug delivery. Manuscript profile -
Open Access Article
227 - Removal of Pb(II) Ion by Iron Oxide Nanoparticles Prepared by Annealing at Two Different Temperature
Aliakbar Dehno Khalaji Marketa Jarosova Pavel Machek Michal Dusek -
Open Access Article
228 - Cr2O3 nanoparticles: Synthesis, characterization, optical, magnetic properties and photocatalytic degradation of methyl orange
Aliakbar Dehno Khalaji Pavel Machek Marketa Jarosova -
Open Access Article
229 - Construction nanoparticles imported into the environment in recent years in Iran
Zahra Sadid Mahsa Fakharpour -
Open Access Article
230 - Poly Ethylene Glycol-Stearate polymer in the design of nano-drug delivery system for oral administration by curcumin
Marzihe Shahbazi Elham Rostami maryam kolahi alireza kiasat -
Open Access Article
231 - Optimization of reaction conditions and effect of catalyst type on product distribution in Cyclooctene oxidation
Yahya Zamani Mehdi Bakavoli Ali Mohajeri Seyed Mohammad Seyedi -
Open Access Article
232 - A Brief Study on electrochemical properties of polypyrrole/nano-SiO2
Omid Zabihi Mohammad Sajjad Khalili Monireh Hajmalek -
Open Access Article
233 - Investigation of removal efficiency of Cr (VI) from industrial wastewater using chitosan and synthesized chitosan nanoparticles
arezou ghadi Soleiman Mahjoub Mohsen ziyari -
Open Access Article
234 - Experimental Investigation of Fe3O4-Chitosan Nanocomposite as a Nano-Demulsifier for Water in Crude Oil Separation
Z. Hasanshahi P. Parvasi M. M. Zerafat Samad Sabbaghi -
Open Access Article
235 - Spectrophotometric Determination of Mefenamic Acid in Biological Samples Using Magnetic Iron Oxide Nanoparticles as a Sorbent for Solid Phase Extraction
Ali Niazi Mahtab D. Torkman Neda Khorshidi -
Open Access Article
236 - Investigation of Products Distribution In Fischer-Tropsch Synthesis By Nano-sized Iron-based Catalyst
Ali Mohajeri Yahya Zamani Laleh Shirazi -
Open Access Article
237 - Green Biosynthesis of Silver Functionalized Multi-Walled Carbon Nanotubes, Using Satureja Hortensis L Water Extract and Its Bactericidal Activity
Sajjad Sedaghat -
Open Access Article
238 - Preclinical Evaluation of Silver-Curcumin Nano- gel : A complete assessment on a new topical antimicrobial product for burn
Monir Aghamoosa Sepideh Arbabi-Bidgoli Solmaz Ghafari Azar Sabokbar Naser Harzandi -
Open Access Article
239 - Synthesis of Copper Nanoparticles in Aqueous Ambient Using Dismutation Reaction
Khodarahm Ghandi Yousef Zeraatkish -
Open Access Article
240 - Synthesis of Chitosan Nanoparticles Loaded with Antibiotics as Drug Carriers and the Study of Antibacterial Activity
Milad Golmohamadi Hamid reza Ghorbani Maryam Otadi -
Open Access Article
241 - Aloe Vera gel extract and sunlight mediated synthesis of silver nanoparticles with highly effective antibacterial and anticancer activity
Noha Mohamed H.M. El-Masry -
Open Access Article
242 - Exploring the cytotoxicity of CeO2 nanoparticles: A compendious approach
Zahra Yaghoobi Abbas Rahdar Vishnu Sankar Nooshin Amini -
Open Access Article
243 - Effect of Alumina Nanoparticles on the Enhancement of Shape Memory, Mechanical and Impact Properties of TPU/ABS blend
Zeinab Sohrabi Abdolhossein Fereidoon Farzaneh Memarian -
Open Access Article
244 - Parameters Affecting the Biosynthesis of Gold Nanoparticles Using the Aquatic Extract of Scrophularia striata and their Antibacterial Properties
Yousef Naserzadeh Niloufar Mahmoudi Elena Pakina Imbia Marie Wase Mohamad Heydari Alfred Khodaverdian -
Open Access Article
245 - Wet chemical synthesis and physical characterization of doped CeO2 nanoparticles
J. Jasmine Ketzial A. Samson Nesaraj -
Open Access Article
246 - Influence of heat treatment on synthesis of stoichiometric perovskite PbTiO3 nanostructure via hydrothermal method
Sahebali Manafi Sedigheh Joughehdoust -
Open Access Article
247 - PVA and EDTA grafted superparamagnetic Ni doped iron oxide nanoparticles prepared by constant current electrodeposition for biomedical applications
Mustafa Aghazadeh Isa Karimzadeh Mohammad Reza Ganjali -
Open Access Article
248 - Determination of Acetaminophen Via TiO2/MWCNT Modified Electrode
Ali Asghar Pasban Elham Hossein Nia Masoumeh Piryaei -
Open Access Article
249 - Adsorption of malachite green dye on different natural absorbents modified with magnetite nanoparticles
Naereh Besharati Nina Alizadeh -
Open Access Article
250 - Copper oxide nanoparticles: Synthesis, characterization, optical property and its application for the removal of methyl green dye
Aliakbar Dehno Khalaji -
Open Access Article
251 - Synergistic effects of Titanium dioxide nanoparticles and Paclitaxel combination on the DNA structure and their antiproliferative role on MDA-MB-231cells
Azadeh Hekmat Masoumeh Afrough Saeed Hesami Tackallou Faizan Ahmad -
Open Access Article
252 - Histopathological study on acute toxicity of nanochelating based silver nanoparticles in mouse model
Seyedeh Mahsan Hoseini-Alfatemi Fatemeh Fallah Abdollah Karimi Maryam Hafizi Shahnaz Armin Somaye Kalanaki -
Open Access Article
253 - Biosynthesis of silver nanoparticles by Achillea eriophora DC extract
Navid Baladi Gholamreza Zarei -
Open Access Article
254 - Application of Nanoanalysis: Amine-Functionalized Mesoporous Silica nanoparticles for Mercury Speciation in Human Samples
Sara Davari Hamid Shirkhanloo Negar Motakef Kazemi -
Open Access Article
255 - Histopathological effects of zinc oxide nanoparticles (ZnO) on skin and muscle tissues of rats
Parisa Saberi-Hasanabadi Sepideh Arbabi-Bidgoli -
Open Access Article
256 - Green synthesis of silver nanoparticles and antioxidant activities in Bunium persicum (Boiss.) B.Fedtsch. seeds extract
Nastaran Kazemivash Ahmad Majd Sayeh Jafari Marandi Seyed Mahdi Rezayat -
Open Access Article
257 - Potential of magnetite nanoparticles with biopolymers loaded with gentamicin drug for bone cancer treatment
Ehsan Nassireslami Mehdi Motififard Bahareh Kamyab Moghadas Zahra Hami Amir Jasemi Amin Lachiyani Reza Shokrani Foroushani Saeed Saber-Samandari Amirsalar Khandan -
Open Access Article
258 - Synthesis of Unsymmetrical Ethers Catalysed by Polyvinyl Sulfuric Acid & PVSA / Nano RH SiO2 as a Novel Solid Acid Nanocomposite
Roya Moeinzadeh Hadi Asareh Ali Reza Kiasat -
Open Access Article
259 - Distribution and Grain Size Support-Dependent Catalytic Properties of Iridium Nanoparticles
Zahra Amirsardari Akram Dourani Mohamad Ali Amirifar Nooredin Ghadiri Massoom Babak Afzali -
Open Access Article
260 - Synthesis of Fe3O4/Eggshell and egg membrane Nanocomposite and Application for Adsorption of Cationic and Anionic Dyes
Naereh Besharati Nina Alizadeh -
Open Access Article
261 - Investigation of the Effect of Extracts on the Green Synthesis of Silver Nanoparticles
Nooshin Amini Gholamreza Amin Zahra Jafari Azar -
Open Access Article
262 - One-step Cathodic Electrochemical Synthesis and Characterization of Dextran Coated Magnetite Nanoparticles
Mustafa Aghazadeh Isa Karimzadeh -
Open Access Article
263 - Photocatalytic degradation of Malachite Green using ZnO and ZnOTiO2 nanoparticles from aqueous solution
Hadi Baseri Elahe Alizadeh -
Open Access Article
264 - Ab initio (first principle) material modeling study on Lio adsorbed by palladium-cobalt (PdCo) nanoparticles
Mikail Aslan -
Open Access Article
265 - A Biotechnological Perspective on The Affinity Magnetic Separation and Purification Based on Oligonucleotides
Leila Farzin Mojtaba Shamsipur Shahab Sheibani -
Open Access Article
266 - Employing α-Fe2O3 /Mn2P2O7 as a nano photocatalyst for degradation of toluene in aqueous environment
Sajjad Mafi Kazem Mahanpoor -
Open Access Article
267 - Caffeine-loaded Fe3O4 nanoparticles: A new magnetically recoverable organocatalyst for Knoevenagel condensation reaction
Mina Javdannezhad Maryam Gorjizadeh Mohammad Hosein Sayahi Soheil Sayyahi -
Open Access Article
268 - Preparation of Chitosan-Copper Nanoparticles Coated Kraft Paper, Characterization and its Antimicrobial Activity
Hamid Reza Ghorbani -
Open Access Article
269 - Structural Features of La0.55Ca0.45A0.50Co0.50O3 (A=Mg, Mn) Nanoparticles Over Photo-Degradation of Methyl Blue
Hamid Yousefi Ahmad Gholizadeh Zahra Mirbeig Sabzevari Azim Malekzadeh -
Open Access Article
270 - The Effect of Alkaline Media and Temperature on the Structure and Magnetic Properties of Magnetic Nanoparticles Modified with PEG
Abolfazl Khodadadi Yaghoob Mohammadmoradi Mohammad Rahim Talebtash -
Open Access Article
271 - Assessment the Wear Properties of Biodiesel-diesel Blends with the Addition of Copper Oxide Nanoparticles
Hossein Khorshidnia Alireza Shirneshan -
Open Access Article
272 - The Acute Toxicity of tin dioxide Nanoparticles on Chlorella vulgaris Algae
Fatemeh Shariati Mahrooz Ziksari Zohreh RamzanpourNowadays, nanotechnology and the use of its components, including nanoparticles, have successfully improved the situation of industries in advancing production goals. Among these nanoparticles, SnO2 or tin dioxide nanoparticles, which was used in this study, can be ment MoreNowadays, nanotechnology and the use of its components, including nanoparticles, have successfully improved the situation of industries in advancing production goals. Among these nanoparticles, SnO2 or tin dioxide nanoparticles, which was used in this study, can be mentioned. Tin dioxide is used in the manufacture of batteries and fuel cells, capacitors, and catalysts, and the health of living organisms will be affected by the negative effects of factory effluents entering rivers and other water sources. In this study, the biotoxicity of tin oxide nanoparticles on Chlorella vulgaris algae, which is one of the primary producers and most important levels of the food chain was investigated. This research was conducted by the OECD acute toxicity test method (Counting method for algae, method 201) and statistical probit analysis was performed to obtain toxicity data using the probit method. The results of exposure for Chlorella vulgaris in 48 and 72 hours, were EC50 and EC90 equal to 6.99, 57.54 and 13.08, and 1.07 x 1010 mg L-1, respectively. The highest growth decrease after 48 and 72 hours was observed in 5.5 mg L-1 SnO2 NP. During the test period, no morphological changes were observed for any of the microorganisms, which are based on the toxicity of tin oxide nanoparticles. Manuscript profile -
Open Access Article
273 - Effects of chitosan nanoparticles on mice infected with Listeria monocytogenes
Sara Kazemi Rad Mirsassan Mirpour Mehdi Assmar Mohamad Reza RazaviListeria monocytogenes is the cause of listeriosis, which has many complications, especially in pregnant women. Due to the antibiotic resistance of this bacterium, many attempts have been made to introduce different medicinal compounds, including nanoparticles based on MoreListeria monocytogenes is the cause of listeriosis, which has many complications, especially in pregnant women. Due to the antibiotic resistance of this bacterium, many attempts have been made to introduce different medicinal compounds, including nanoparticles based on biological compounds. This research aimed to examine the mechanism of the effect of chitosan nanoparticles on L. monocytogenes in vivo (in the body of a living organism). The standard strain of L. monocytogenes (ATCC 7644) was prepared and analyzed in the Day Hospital Laboratory (Iran). The bacteria were examined based on biochemical tests. Then, the antibacterial activity of concentrations of 4.88 to 5000 µg/mL of chitosan nanoparticles against L. monocytogenes standard (ATCC 7644) was calculated with the investigated methods and the lowest inhibitory and bactericidal concentrations (MIC and MBC, respectively). The effects of different nanoparticle concentrations and ampicillin in mice infected with bacteria were also investigated. In infected mice, the therapeutic effect increased with increasing the nanoparticle concentration, and the concentration of 156.25 /mL was the most effective compared to other treatments. Also, ampicillin chitosan nanoparticles with a concentration of 39.06 g/mL had almost the same therapeutic effect. With the timely identification of listeria contamination in pregnant women and the proper use of chitosan nanoparticles instead of common drugs, a new solution can be found for the treatment of listeriosis. Manuscript profile -
Open Access Article
274 - Antimicrobial and Anti-biofilm Effect of Samarium Oxide Nanoparticles on Pseudomonas aeruginosa Isolated from Hospital wards
Hossein Zahmatkesh Mirsasan Mirpour Hojjatolah Zamani Behnam RastiThe development of drug resistance, treatment ineffectiveness, and the occurrence of Pseudomonas aeruginosa infections are primarily attributed to biofilm formation and quorum sensing (QS)-dependent virulence factors. This study aimed to synthesize samarium oxide nanopa MoreThe development of drug resistance, treatment ineffectiveness, and the occurrence of Pseudomonas aeruginosa infections are primarily attributed to biofilm formation and quorum sensing (QS)-dependent virulence factors. This study aimed to synthesize samarium oxide nanoparticles (Sm2O3NPs) using curcumin and evaluate their antimicrobial effects against P. aeruginosa isolated from different hospital wards. Based on TEM, XRD, and EDX analysis, the synthesized nanoparticles exhibited a cubic structure with an average size of 32.61 nm and a pure crystalline phase. The Sm2O3NPs exhibited notable antibacterial efficacy against P. aeruginosa strains. Based on the CV staining assay, sub-MIC of Sm2O3NPs inhibited the biofilm formation of P. aeruginosa strains by 16-69%. Additionally, the levels of pyocyanin in the NPs-treatment groups decreased by 29-58% compared to the control group. This research confirms the significant antibacterial potential of Sm2O3NPs, implying their potential utilization as an effective antibacterial agent against P. aeruginosa strains isolated from various hospital wards, after further characterization. Manuscript profile -
Open Access Article
275 - Preparation and evaluation of sodium alginate nanoparticles containing CRM197 protein by ionic gelation method
ُSamira َAghamiri Mojtaba Noofeli Hamid reza Goudarzi Parvaneh Saffarian Zahra Salehi NajafabadiDevelopment of the recombinant vaccines against infectious diseases is dependent on the identification of immunogenic antigens and vaccine delivery systems such as polymeric nanoparticles that are able to stimulate immune responses similar to or better than conventional MoreDevelopment of the recombinant vaccines against infectious diseases is dependent on the identification of immunogenic antigens and vaccine delivery systems such as polymeric nanoparticles that are able to stimulate immune responses similar to or better than conventional vaccines and reduce complications associated with traditional vaccines. At the present study, synthesis and properties of the sodium alginate nanoparticles carrying CRM197 protein as an antigen delivery system were evaluated. Synthesis of the blank optimized without protein loading and protein-containing nanoparticles was performed by ionic gelation method. After designing of the experiment (DoE) and determining the influential physicochemical factors in ideal nanoparticles synthesis; size, zeta potential, morphology, encapsulation efficiency, release pattern and FT-IR spectroscopy were investigated. The optimized nanoparticles were prepared at a concentration of 0.2% w/v sodium alginate, 0.1% w/v calcium chloride, 0.04% w/v poly-L-lysine during 45 minutes of stirring at 2000 rpm and in pH 6.5. The average nanoparticle size for blank and CRM197 loaded nanoparticles were 88 and 245 nm also zeta potential -21 and -24.2 mV, respectively. LE and LC were >80% and >20%, respectively, associated with a stable and long-term encapsulated protein release pattern from nanoparticles. Absence of local and systemic signs, as well as weight gain in the mice group studied, indicated the safety of the nanoparticles and CRM197 protein combination. Based upon the above achievements, alginate nanoparticles can be used as an antigen delivery system for targeted delivery with controlled, slow release and improved stability of recombinant diphtheria antigen (CRM197) for immunization against diphtheria disease. Manuscript profile -
Open Access Article
276 - Evaluate the inhibitory activity of ZnO nanoparticles against standard strains and isolates of Staphylococcus aureus and Escherichia coli isolated from food samples
alireaz masiha maryam baradaran khosro isazadehThe antibacterial effect of different concentrations of zinc oxide nanoparticles on standard and isolated S. aureus and E. coli from food were studied. In this experimental study, suspension has been prepared from commercial ZnO nanoparticles in broth medium. After prep MoreThe antibacterial effect of different concentrations of zinc oxide nanoparticles on standard and isolated S. aureus and E. coli from food were studied. In this experimental study, suspension has been prepared from commercial ZnO nanoparticles in broth medium. After preparing standard strain and the strain were isolated from food samples, the effect of 1 and 2 times of Minimum Inhibitory Concentration (MIC) and also MBC test for ZnO nanoparticles on bacteria in different time were analyzed. According to the results obtained in this study, the maximum diameter of growth inhibition related to the concentration in5000 μg/ml zinc oxide nanoparticles for standard and isolated strain of E. coli. The average diameter of growth inhibition of standard strain of E. coli PTCC1399 and S. aureus PTCC11189 respectively were17.4 and 20.5 mm. The average diameter of the growth of E. coli and S. aureus isolated from foods respectively were 18.4 and 15.4 mm. A comparison of average MIC and MBC ZnO nanoparticles on the bacteria strains by Duncan test (p˂0.005) showed that the MBC is higher than the MIC in whole position bacteria. A ZnO nanoparticle among bacteria has most inhibition onS.aureu and for E. coli ST showed least impact. Results showed that mean comparison testis significantly different. Among times, zero time has the highest OD and the lowest OD was obtained in 240 second. This study showed that zinc oxide nanoparticles can be used to inhibit mentioned bacteria and can be a potential for alternative preservatives to prevent food spoilage possess. Manuscript profile -
Open Access Article
277 - Studying the antifungal effects of graphene nanoparticles on Aspergillus niger and Penicillium citrinum
Nader Habibi Maryam Aliasghari Asad RokhzadiThis study was conducted to study the antifungal effects of graphene nanoparticles on Aspergillus niger and Penicillium citrinum. Different concentrations of graphene nanoparticles were investigated to determine the minimum inhibitory concentration (MIC), the minimum fu MoreThis study was conducted to study the antifungal effects of graphene nanoparticles on Aspergillus niger and Penicillium citrinum. Different concentrations of graphene nanoparticles were investigated to determine the minimum inhibitory concentration (MIC), the minimum fungicidal concentration (MFC) and inhibition zone diameter. The results showed that the concentration of graphene nanoparticle which inhibited the growth of Penicillium mold was statistically more than that of Aspergillus niger. On the other hand, there was no difference between the concentrations of MFC for these two fungi. The MIC results for Aspergillus niger and Penicillium citrinum were 10388.9 and 10527.8 μg/ml respectively. Evaluation of the growth inhibition zone showed that up to 10500 ppm, there was no difference between the inhibition zones diameter of two microorganisms. However, with an increase in the concentration of graphene nanoparticle, the difference between the zone diameters in the two molds increased, so that the diameter of the inhibition zone of Aspergillus niger in higher nanoparticle concentrations was more than that of Penicillin citrinum. According to the results of this study it can be concluded that the effect of graphene nanoparticles on Aspergillus niger was higher than that of Penicillin citrinum. Manuscript profile -
Open Access Article
278 - Antimicrobial Effect of Biosynthesized Silver Nanoparticles Using Rosemary (Rosmarinus officinalis) Extract on Some Soft Rot Bacteria in Storage Condition
Esmaiil Torkabadi Zeinab Fotoohiyan fatemeh shahdadiNowadays, use of plants in the synthesis of metal nanoparticles, which have antimicrobial activity, is considered. The aim of present study was evaluating biosynthesis of silver nanoparticles from aqueous extract of rosemary and then investigating the effect of these na MoreNowadays, use of plants in the synthesis of metal nanoparticles, which have antimicrobial activity, is considered. The aim of present study was evaluating biosynthesis of silver nanoparticles from aqueous extract of rosemary and then investigating the effect of these nanoparticles and mancoseb toxin on soft rot bacteria isolated from carrots, potatoes and onions during storage. The biosynthesized silver nanoparticles were analyzed by ultraviolet and FTIR spectroscopy. Soft rot bacteria were isolated and identified using selective and specific culture media from carrots, potatoes and onions. A pathogenic isolate from each sample with the highest pathogenicity was selected for the tests and their minimum inhibitory concentration (MIC) was evaluated against the experimental treatments. The MIC of the pathogen isolates against the 2580 mg/ml of silver nanoparticles and 1000 ppm of mancoseb were 88.88% and 100%, respectively. The mean percentage of vegetable contamination with pathogen isolate in the presence of silver nanoparticles in the third month of storage was 70%, 80% and 70% for onions, potatoes and carrots, respectively, and average percentage of vegetable contamination with pathogenic isolates in the combined control of bacteria with silver nanoparticles and mancoseb toxin at the third month of storage for onion, potato and carrot were 45, 40 and 40%, respectively. According to obtained results, the combined control of biosynthesized silver nanoparticles and Mancoseb can be used to control of soft rot bacteria in carrot, potato and onion. Manuscript profile -
Open Access Article
279 - The antimicrobial effect of basil seed mucilage-ZnO nanocomposite coating on the quality of cheddar cheese during ripening
Sahar Kheirkhah Foghara sara jafarian Shahin Zomorodi Leila Roozbeh Asghar Khosrowshahi aslCheddar cheese is a hard type of cheese. It is coated traditionally by a special wax. Commercial coating materials which are used for coating are non-edible as a result they are undesirable due to environmental pollution and allergies caused in some consumers. Today, bi MoreCheddar cheese is a hard type of cheese. It is coated traditionally by a special wax. Commercial coating materials which are used for coating are non-edible as a result they are undesirable due to environmental pollution and allergies caused in some consumers. Today, biodegradable films are receiving more attention. In this study, the effect of edible coating of basil seed mucilage containing zinc oxide nanoparticles (ZnO-NP) in three levels of zero, 0.25 and 0.5% on the quality properties of cheddar cheese was investigated during ripening for 90 days. The results of experiments showed that at the end of ripening, the highest amount of salt and fat and the lowest amount of moisture were related to the sample with mucilage coating containing 0.5% of ZnO-NP. Also, during ripening, in all samples the number of non-starter lactic acid bacteria increased, but the number of starter bacteria increased first and then decreased (p < 0.01). Also, in all treatments, the total number of mesophilic aerobic bacteria, Pseudomonas, mold and yeast increased significantly during storage, which was the lowest in samples with coating containing ZnO-NP (p < 0.01). In addition, ZnO-NP coatings prevented mold growth on the surface of cheddar cheese samples. According to the results obtained of this study, basil seed mucilage containing 0.5% ZnO-NP can be used as a coating in cheddar cheese without any adverse effect on the flavor of cheese. Manuscript profile -
Open Access Article
280 - CdO nanoparticles as an efficient, mild and recyclable catalyst for the synthesis of 2-aryl benzoxazole derivatives by grinding method
Ashok Borhade Bhagwat Uphade -
Open Access Article
281 - Fe3O4@SiO2@Am-PPC-SO3H] [HSO4]: A new magnetic solid acid nanocatalyst for the synthesis of benzoxazole derivatives
Mona Sayyahi Maryam Gorjizadeh Soheil Sayyahi -
Open Access Article
282 - Rapid, convenient and solventless green approach for the synthesis of aryloximes using ZnO nanoparticles as an efficient catalyst
Leila Dinparast Hassan Valizadeh -
Open Access Article
283 - Formaldehyde measurement based on its electrocatalytic oxidation by Ni-TiO2 nanoparticles/chitosan modified carbon paste electrode as an effective method
Ebrahim Zarei Mohammad Reza Jamali Jaber Bagheri -
Open Access Article
284 - Fe3O4@SiO2 nanoparticles: An efficient, green and magnetically reusable catalyst for the one-pot synthesis of 14-aryl-14H-dibenzo[a,i]xanthene-8,13-dione derivatives
Mohammad Ali Ghasemzadeh Mina Azimi-Nasrabad Javad Safaei-Ghomi -
Open Access Article
285 - Facile and green synthesis of CuO nanoparticles and electrocatalytic activity of CuO nanoparticles/conductive polymer composite film
Ali Ehsani Reyhaneh Asgari Akbar Akbar Rostami-Vartooni Hamid Mohammad Shiri Ali Yeganeh Faal -
Open Access Article
286 - Environmentally benign synthesis of 14-Phenyl-8H-Dibenzo[a,i]xanthene-8,13(14H)-Diones using CuI nanoparticles as an efficient catalyst
Javad Safaei-Ghomi Jalal Shapoori Mohammad Ali Ghasemzadeh -
Open Access Article
287 - Photocatalytic oxidation of an organophosphorus simulant of chemical warfare agent by modified TiO2 nanophotocatalysts
Abbas Besharati-Seidani -
Open Access Article
288 - Photocatalytic degradation of ciprofloxacin in the presence of synthesized ZnO nanocatalyst: The effect of operational parameters
Solmaz Aghdasi Mohammad Shokri -
Open Access Article
289 - One-pot synthesis of 2-amino-3-cyanopyridine derivatives catalyzed by zinc zirconium phosphate in solvent-free conditions
Hirbod Karimi -
Open Access Article
290 - Synthesis of pyrazolopyranopyrimidines catalyzed by caffeine supported on boehmite nanoparticles and their evaluation for anti-bacterial activities
Mohammad Bakherad Rahele Doosti Mahdi Mirzaee Khosrow Jadidi -
Open Access Article
291 - An environmentally friendly approach to the synthesis of azo dyes based on 2-naphthol using kaolin-SO3H nanoparticles
Abdolhamid Bamoniri Bi Bi Fatemeh Mirjalili Nahid Yaghmaeiyan-Mahabadi -
Open Access Article
292 - Hazelnut shell as a valuable bio-waste support for green synthesis of Ag NPs using Origanum vulgare leaf extract: Catalytic activity for reduction of methyl orange and Congo red
Bahar Khodadadi -
Open Access Article
293 - Developments of modified magnetic nanoparticle -supported heteropolyacid catalytic performances in dibenzothiophene desulfurization
Hossein Salavati Abbas Teimouri Shahnaz Kazemi -
Open Access Article
294 - Synthesis of dihydrofurans using biosynthesized CuO nanoparticles
Javad Safaei-Ghomi Hossein Shahbazi-Alavi -
Open Access Article
295 - Experimental design study of RB 255 photocatalytic degradation under visible light using synthetic Ag/TiO2 nanoparticles: Optimization of experimental conditions
Narges Elmi Fard Reza Fazaeli -
Open Access Article
296 - Green synthesis of Ag/Fe3O4/ZrO2 nanocomposite using aqueous Centaurea cyanus flower extract and its catalytic application for reduction of organic pollutants
Akbar Rostami-Vartooni Abolfazl Moradi-Saadatmand Mojtaba Bagherzadeh Mohammad Mahdavi -
Open Access Article
297 - Alkanedisulfamic acid functionalized silica-coated magnetic nanoparticles as a reusable efficient nanocatalyst for synthesis of gem-dihydroperoxides and 1,2,4,5-tetraoxanes
Kaveh Khosravi Ali Reza Karimi Shirin Naserifar -
Open Access Article
298 - ZrP2O7 nanoparticles as a robust and efficient catalyst for the synthesis of 2-aryl-5-methyl-2,3-dihydro-1H-3-pyrazolones under microwave irradiation
Javad Safaei-Ghomi Esmaeil Afkhami Hossein Shahbazi-Alavi Abolfazl Ziarati -
Open Access Article
299 - Reflux condensation synthesis and characterization of Co3O4 nanoparticles for photocatalytic applications
M. Mohamed Jaffer Sadiq A. Samson Nesaraj -
Open Access Article
300 - Synthesis of benzimidazole derivatives using Ni2+ supported on hydroxyapatite-core@shell γ-Fe2O3 nanoparticles both under solvent and solvent-free conditions
Eshagh Rezaee Nezhad Saaid Karimian -
Open Access Article
301 - ZrP2O7 NPs: A recyclable, efficient heterogeneous catalyst for the synthesis of 1,6-diamino-2-oxo-4-phenyl-1,2-dihydropyridine-3,5-dicarbonitrile derivatives via a multi-component reaction
Javad Safaei-Ghomi Hossein Shahbazi-Alavi Mohammad Reza Saberi-Moghadam Abolfazl Ziarati -
Open Access Article
302 - Eco-friendly preparation and characterization of CuMn2O4 nanoparticles with the green capping agent and their photocatalytic and photovoltaic applications
Ali Sobhani-Nasab Mohammad Eghbali-Arani Seyed Mostafa Hosseinpour-Mashkani Farhad Ahmadi Mehdi Rahimi-Nasrabadi Vahid Ameri -
Open Access Article
303 - Preparation of ZnO nanocatalyst supported on todorokite and photocatalytic efficiency in the reduction of chromium (VI) pollutant from aqueous solution
Maryam Sabonian Kazem Mahanpoor -
Open Access Article
304 - Nitrogen doped TiO2 for efficient visible light photocatalytic dye degradation
Jila Talat-Mehrabad Mohammad Partovi Farzad Arjomandi Rad Rana Khalilnezhad -
Open Access Article
305 - Photocatalytic degradation of malachite green dye using NiAl2O4 and Co doped NiAl2O4 nanophotocatalysts prepared by simple one pot wet chemical synthetic route
M. Arunkumar A. Samson Nesaraj -
Open Access Article
306 - One-pot three-component synthesis of tetrahydrobenzo[b]pyrans in the presence of Ni0.5Cu0.5Fe2O4 magnetic nanoparticles under microwave irradiation in solvent-free conditions
Hamideh Ahankar Saeid Taghavi Fardood Ali Ramazani -
Open Access Article
307 - Green synthesis of iron nanoparticles by Terminalia arjuna bark extract and photodegradation of rose bengal
Mrunal Vishnu Kangralkar Manjanna Jayappa -
Open Access Article
308 - Fe3O4@SiO2@IL‐PVP magnetic nanoparticles: Effective synthesis of spirooxindoles
Shahla Veysipour Masoud Nasr-Esfahani Zahra Rafiee Behrouz Eftekhari far -
Open Access Article
309 - Magnesium-iron bimetal oxides as an effective magnetized solid-base catalyst for the synthesis of substituted 2-aminthiophenes
Rayhaneh Ashkevar-Vakili Farid Moeinpour -
Open Access Article
310 - An Update on Half-decade Recent Advances in Functionalized Fe3O4 Nanoparticles as Heterogeneous Nanocatalysts for the Synthesis of Six-Membered Compounds Containing Nitrogen: A Mini-Review
Faris Mohammed Aseel M. Aljeboree Nour Abd Alrazzak Ayad F. Alkaim Yasir Karim Sarah A. Hamood Ahmed B. Mahdi Mohammed Abed Jawad Salam Ahjel -
Open Access Article
311 - Rapid Synthesis of Silver Nanoparticles and Their Decoration on TiO2 by Plasma-Over-Liquid Process: Characterization and Application for Tetracycline Antibiotic Degradation
Margarita Skiba Victoria Vorobyova -
Open Access Article
312 - Sensitive Electrocatalytic Assay of Cyclotetramethylene Tetranitramine (HMX) Explosive on Carbon Nanotube/Ag Nanocomposite Electrode
Sajjad Damiri Hamid Reza Pouretedal Maryam Mahmoudi -
Open Access Article
313 - Novel Silica-coated Magnetic Nanoparticles and Their Synthetic Applications
Shripad Patil -
Open Access Article
314 - ZnO nanoparticles as an Efficient and Reusable Catalyst for Synthesis of Quinoxaline under Solvent Free Condition
Bahareh Sadeghi Fereshteh Karimi -
Open Access Article
315 - Supercritical water impregnation of CuO nanoparticles on silica-support as new catalyst
Seyed Javad Ahmadi Morteza Hosseinpour Mohammad Outokesh -
Open Access Article
316 - Synthesis, characterization and photocatalytic activity of CeO2-SBA-15
Hamid Reza Pouretedal Sara Basati -
Open Access Article
317 - Kinetic investigation of photocatalytic degradation of dimethyldisulfide by zeolite A containing nano CdS
Alireza Nezamzadeh-Ejhieh Zohreh Banan -
Open Access Article
318 - A new, green and recyclable poly(4-vinylpyridine)-supported copper iodide nanoparticles catalyst for the synthesis of aryl-14H-dibenzo [a-o] xanthenes
Jalal Albadi Nasir Iravani Moloud Khoshakhlagh -
Open Access Article
319 - -Fe2O3@SiO2-PW12 nanoparticles: Highly efficient catalysts for the synthesis of pyrazoline derivatives
Hamid Aliyan Razieh Fazaeli Nafiseh Tajsaeed -
Open Access Article
320 - Magnetic Fe3O4 nanoparticles as a highly efficient catalyst for the synthesis of imidazoles under ultrasound irradiation
Javad Safari Zohre Zarnegar -
Open Access Article
321 - Zinc Oxide Nanoparticles Have Beneficial Effect on Frozen-Thawed Spermatozoa of Holstein Bulls
F. Farhadi A. Towhidi M. Shakeri A. Seifi-Jamadi -
Open Access Article
322 - Effects of Zinc Nanoparticles on Growth Performance, Carcass Characteristics, Immunity, and Meat Quality of Broiler Chickens
M. Eskandani ح. جانمحمدی S.A. Mirghelenj M. Ebrahimi S. Kalanaky -
Open Access Article
323 - تأثیر مکملسازی نانو ذرات اکسید روی بر عملکرد رشد و تلفات ناشی از آسیت در جوجههای گوشتی
م. فتحیتعداد 600 قطعه جوجه گوشتی نر (راس 308) به چهار گروه آزمایشی ( 5 تکرار و 30 پرنده در هر تکرار) شامل 0، 10، 20 و 40 میلیگرم نانوذرات اکسید روی در کیلوگرم جیره پایه تقسیم شدند. برای القاء آسیت، همه پرندگان تحت برنامه دمایی سرد (15 تا 18 درجه سانتی­گراد) قرار گرفتند. نم Moreتعداد 600 قطعه جوجه گوشتی نر (راس 308) به چهار گروه آزمایشی ( 5 تکرار و 30 پرنده در هر تکرار) شامل 0، 10، 20 و 40 میلیگرم نانوذرات اکسید روی در کیلوگرم جیره پایه تقسیم شدند. برای القاء آسیت، همه پرندگان تحت برنامه دمایی سرد (15 تا 18 درجه سانتی­گراد) قرار گرفتند. نمونه خونی شامل؛ فعالیت آنزیم آسپارتات آمینوترانسفراز، آلانین آمینوترانسفراز، لاکتات دهیدروژناز، پروتئین، هموگلوبین، هماتوکریت، گلبول قرمز، گلبول سفید و سطح مالون دی­آلدئید اندازه­گیری شدند. تلفات نیز جهت تعیین دلیل مرگ آسیتی، بررسی شد. روز آخر آزمایش (روز 42) از هر تکرار 2 قطعه پرنده به طور تصادفی انتخاب شده و بعد از کشتار، شاخص آسیتی محاسبه گردید. میانگین افزایش وزن بدن، میانگین خوراک مصرفی و ضریب تبدیل خوراک نیز ب طور هفتگی محاسبه گردید. نتایج نشان داد، سطح 40 میلیگرم نانو ذرات اکسید روی به طور معنی­داری سبب کاهش سطح مالون­دی­­آلدئید در پلاسما و کبد پرندگان شد. علاوه بر این، سطوح 20 و 40 میلیگرم سبب کاهش معنی­دار شاخصی آسیتی و تلفات ناشی از آسیت شدند. همچنین، در حالیکه نانو ذرات اکسید روی در همه سطوح سبب افزایش وزن حاصله شد، سطح 40 میلیگرم سبب کاهش معنی­دار ضریب تبدیل خوراک شد. نتیجه این تحقیق نشان داد که استفاده از نانو ذرات اکسید روی سبب بهبود عملکرد و کاهش تلفات آسیتی در جوجه­های گوشتی شد و مناسب­ترین سطح آن در این 40 میلیگرم بود. Manuscript profile -
Open Access Article
324 - تأثیر تزریق داخل تخممرغی نانوذرات کربنات کلسیم بر خصوصیات استخوان و عملکرد جوجههای گوشتی بعد از تفریخ
ج. سالاری ح.ر. همتی متین ک. غفاری ه. حاجتیاین آزمایش برای ارزیابی تأثیر تزریق داخل تخم­ مرغی نانوذرات کربنات کلسیم بر خصوصیات استخوان، فراسنجه­های خونی و عملکرد جوجه­های گوشتی بعد از تفریخ انجام شد. تخم ­مرغ­های بارور (400 عدد) به 4 گروه هر کدام شامل 100 عدد تخم ­مرغ اختصاص داده شد. در ر Moreاین آزمایش برای ارزیابی تأثیر تزریق داخل تخم­ مرغی نانوذرات کربنات کلسیم بر خصوصیات استخوان، فراسنجه­های خونی و عملکرد جوجه­های گوشتی بعد از تفریخ انجام شد. تخم ­مرغ­های بارور (400 عدد) به 4 گروه هر کدام شامل 100 عدد تخم ­مرغ اختصاص داده شد. در روز اول انکوباسیون، نانوذرات کربنات کلسیم در سطوح 100، 200 میلی­گرم/لیتر در 5/0 سی­سی سرم فیزیولوژی به دو گروه تزریق شد، یک گروه فقط 5/0 سی­سی سرم فیزیولوژی دریافت کرد و گروه دیگر مورد تزریق قرار نگرفت. جوجه­های متولد شده از هر گروه به طور تصادفی به 4 گروه هر کدام شامل 15 جوجه اختصاص داده شد و تحت شرایط طبیعی پرورش داده شدند. نتایج نشان داد که وزن بدن، وزن طحال و کلسیم استخوان جوجه­های متولد شده در گروهی که سطح 200 میلی­گرم/لیتر نانوذرات کربنات کلسیم دریافت کرده بودند بیشتر شد (05/0P<). بیشترین وزن بورس در گروهی که سطح 200 میلی­گرم/لیتر نانوذرات کربنات کلسیم دریافت کرده بودند مشاهده شد (05/0P<). تزریق سطوح 100 یا 200 میلی­گرم/لیتر نانوذرات کربنات کلسیم به طور معنی­داری سبب افزایش فعالیت آلکالین فسفاتاز پلاسما و غلظت مس استخوان جوجه­های متولد شده گردید (05/0P<). تزریق داخل تخم ­مرغی تأثیر معنی­داری بر عملکرد جوجه­ها در سنین 1 تا 21 روزگی نداشت (05/0P<). این نتایج اولیه نشان می­دهد که تزریق 100 یا 200 میلی­گرم/لیتر نانوذرات کربنات کلسیم در روز اول انکوباسیون می­تواند سبب افزایش سرعت رشد و توسعه استخوان شود. Manuscript profile -
Open Access Article
325 - بررسی اثر جایگزینی مکمل سولفات آهن با نانوذرات هیدروژن فسفات آهن بر عملکرد، خصوصیات لاشه و میزان ذخیره آهن بافت جوجههای گوشتی
M.A. Behroozlak م. دانشیار پ. فرهومند ع. نیکوآزمایشی به منظور مقایسه اثرات نانوذرات هیدروژن فسفات آهن (FeHPO4-nanoparticles) با سولفات آهن (FeSO4.7H2O) بر عملکرد، خصوصیات لاشه و میزان ماده معدنی ماهیچه سینه جوجه­های گوشتی انجام گرفت. در این آزمایش، تعداد 200 قطعه جوجه خروس گوشتی یکروزه سویه راس به طور تصادفی ب Moreآزمایشی به منظور مقایسه اثرات نانوذرات هیدروژن فسفات آهن (FeHPO4-nanoparticles) با سولفات آهن (FeSO4.7H2O) بر عملکرد، خصوصیات لاشه و میزان ماده معدنی ماهیچه سینه جوجه­های گوشتی انجام گرفت. در این آزمایش، تعداد 200 قطعه جوجه خروس گوشتی یکروزه سویه راس به طور تصادفی به 4 گروه آزمایشی با 5 تکرار و 10 پرنده در هر تکرار اختصاص یافتند. میزان آهن موجود در جیره پایه (ذرت-کنجاله سویا) در 3 دوره آزمایشی آغازین، رشد و پایانی به ترتیب 40/87، 13/85 و 24/82 میلی­گرم بر کیلوگرم بودند. گروه­های آزمایشی تغذیه­ای شامل: 1- جیره پایه + 80 میلی­گرم سولفات آهن (گروه شاهد) 2- جیره پایه + 4/6 میلی­گرم نانوذرات هیدروژن فسفات آهن 3- جیره پایه + 2/3 میلی­گرم نانوذرات هیدروژن فسفات آهن و 4- جیره پایه + 6/1 میلی­گرم نانوذرات هیدروژن فسفات آهن بودند که از سن 1 تا 42 روزگی مورد استفاده قرار گرفتند. نتایج آزمایش نشان داد که جیره­های آزمایشی تأثیر معنی­داری بر صفات عملکردی میانگین مصرف خوراک روزانه، میانگین افزایش وزن روزانه، ضریب تبدیل خوراک، درصد تلفات و شاخص تولید اروپایی نداشتند (05/0P>). افزودن نانوذرات هیدروژن فسفات آهن به جیره پایه در گروه آزمایشی دوم، وزن نسبی چربی محوطه بطنی را در مقایسه با گروه شاهد به طور معنی­داری کاهش داد (04/0=P). همچنین با افزودن نانوذرات هیدروژن فسفات آهن در گروه آزمایشی سوم، پاسخ­های رگرسیون درجه سوم (05/0=P) و درجه دوم (02/0=P) به ترتیب در مورد بازده لاشه و وزن نسبی کبد مشاهده گردید. پرندگان تغذیه شده با نانوذرات هیدروژن فسفات آهن در گروه­های آزمایشی دوم و سوم در مقایسه با پرندگان دریافتکننده­ جیره حاوی 80 میلی­گرم سولفات آهن، میزان آهن و مس بیشتری در ماهیچه سینه داشتند (05/0>P). هیچ تفاوت معنی­داری در بین گروه­های آزمایشی برای میزان روی گوشت سینه مشاهد نشد (05/0P>). نتایج این مطالعه نشان داد که جایگزینی مکمل سولفات آهن با نانوذرات هیدروژن فسفات آهن بر عملکرد پرندگان تأثیرگذار نبود ولی توانست میزان آهن موجود در گوشت سینه جوجه­های گوشتی را به طور معنی­داری افزایش دهد. Manuscript profile -
Open Access Article
326 - Effect of SiO2 nanoparticles on phytochemical and anatomical alterations in Anthemis gilanica
Halimeh Hassanpour Nastaran Ahmadi Malak Hekmati Mahbobeh Ghanbarzadeh -
Open Access Article
327 - Effect of biologically synthesized silver nanoparticles on Melissa officinalis L.Evaluation of growth parameters, secondary metabolites and antioxidant enzymes
Asiyeh Shavalibor Sedigheh Esmaeilzadeh Bahabadi -
Open Access Article
328 - The effect of biosynthesized silver nanoparticles on FAE1 and FAD2 gene expression in Camelina sativa
Tayebehalsadat Mirmoeini Leila Pishkar Danial Kahrizi Giti Barzin Naser Karimi -
Open Access Article
329 - Synthesized Fe3O4 nanoparticles induced antioxidant activity and total phenolic and flavonoid content in Matricaria chamomilla seedlings
Mahsa Rastegaran Halimeh Hassanpour Hakimeh Ziyadi -
Open Access Article
330 - Effects of Silver Nanoparticle Exposure on Growth, Physiological and biochemical Parameters of Dracocephalum moldavica L.
Zahra Haghighi Pak Naser Karimi Hossein Abbaspour -
Open Access Article
331 - Biological synthesis of nanoparticles using Aloe vera, Chamomile, and Licorice extracts
Mojtaba Pourrezvani Mahdi Changizi Shahab Khaghani Masoud Gomarian Davood Ghanbari -
Open Access Article
332 - اثر تیمار کوتاه مدت با نانو ذرات نقره و محلول گلجایی ساکارز روی پیری گل و برگ شاخه بریده رز
خدیجه آل کثیر رحیم نقش بند حسنی علیرضا مطلبی آذراین آزمایش برای ارزیابی اثر تیمار کوتاه مدت نانو ذرات نقره در غلظت­ های صفر، 4، 25، 75 و 125 میلی­ گرم در لیتر روی گل شاخه بریدنی رز رقم ʼهای اند مجیکʻ بدنبال نگهداری در محلول ساکارز با غلظت­ های صفر، 2 و 3 درصد از نظر عمر گلجایی و برخی از صفات فیزیولوژیکی پ Moreاین آزمایش برای ارزیابی اثر تیمار کوتاه مدت نانو ذرات نقره در غلظت­ های صفر، 4، 25، 75 و 125 میلی­ گرم در لیتر روی گل شاخه بریدنی رز رقم ʼهای اند مجیکʻ بدنبال نگهداری در محلول ساکارز با غلظت­ های صفر، 2 و 3 درصد از نظر عمر گلجایی و برخی از صفات فیزیولوژیکی پس از برداشت آن انجام شد. این تحقیق به شکل آزمایش فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار برای هر تیمار اجرا شد. آزمایش تحت شرایط دمای 2 ± 23 درجه سانتی­گراد، رطوبت نسبی 5±60 درصد و با شدت نوری محیط 12 میکرو مول در مترمربع درثانیه به مدت 12 ساعت توسط لامپ­ های فلورسنت انجام شد. نتایج نشان داد که تیمار 125 میلی­ گرم در لیتر نانو ذرات نقره همرا با ساکارز دو درصد و بدون ساکارز بیشترین تاثیر را در کنترل باکتری­ های انتهای ساقه را داشت. تیمار کوتاه مدت نانو ذرات نقره در کلیه غلظت­ ها سبب بهبود جذب محلول، حفظ رطوبت نسبی شاخه، بهبود باز شدن گل و شاخص فلورسانس کلروفیل برگ (Fv/Fm) در مقایسه با تیمار شاهد گردید. بیشترین میزان باز شدگی گل با درشت­ترین اندازه گل در تیمار 75 میلی­ گرم در لیتر نانوذرات همراه با ساکارز 2 درصد در روز نهم عمر گلجایی مشاهده گردید. کمترین میزان عمر گلجایی در تیمارهای آب مقطر به تنهایی و همراه با ساکارز بود. بیشترین میزان عمر گلجایی در تیمارهای 75 و 125 میلی­ گرم در لیتر نانو ذرات نقره بدون ساکارز و با ساکارز در مقایسه با سایر تیمارها مشاهده گردید. Manuscript profile -
Open Access Article
333 - بهبود عمر پس از برداشت گل های شاخه بریده آلسترومریا ’Konst Coco‘ با استفاده از ترکیب روش های مکانیکی و شیمیایی
مهدی حکیمی اصل احمدرضا بریموندی به ­منظور بررسی اثر متقابل روش ­های مکانیکی (شکاف ته ساقه) و شیمیایی (نانوسیلور) بر عمر گلجایی و خصوصیات بیوشیمیایی گل­ های شاخه بریده آلسترومریا ’Konst Coco‘ آزمایشی فاکتوریل بر پایه طرح کاملا تصادفی با 10 تیمار، 3 تکرار، 30 پلات و 150 شا More به ­منظور بررسی اثر متقابل روش ­های مکانیکی (شکاف ته ساقه) و شیمیایی (نانوسیلور) بر عمر گلجایی و خصوصیات بیوشیمیایی گل­ های شاخه بریده آلسترومریا ’Konst Coco‘ آزمایشی فاکتوریل بر پایه طرح کاملا تصادفی با 10 تیمار، 3 تکرار، 30 پلات و 150 شاخه گل انجام شد. تیمارهای آزمایشی شامل شکاف طولی انتهای ساقه در دو سطح (بدون شکاف و شکاف 5 سانتی­ متری) و نانوسیلور در 5 سطح (0، 5، 10، 20 و 30 میلی­ گرم در لیتر) بودند. نتایج نشان داد که اثر متقابل تیمارهای آزمایشی روی همه صفات ارزیابی شده از نظر آماری معنی­ دار است. طبق نتایج مقایسه میانگین­ ها، بیشترین عمر گلجایی (13/88 روز) با کاربرد "شکاف 5 سانتی­ متری× 20 میلی­ گرم در لیتر نانوسیلور" حاصل شد که نسبت به شاهد 6/83 روز ماندگاری این گل شاخه بریده را افزایش داد. بیشترین جذب آب (2/03 میلی­ لیتر در هر گرم وزن تر)، ماده خشک (14/11 درصد)، کلروفیل کل (2/432 میلی­ گرم در هر گرم وزن تر) و کاروتنوئید گلبرگ (2/307 میکروگرم در هر گرم وزن تر) و کمترین کاهش وزن تر (1/34 گرم)، باکتری انتهای ساقه و محلول گلجایی (3 کلنی)، اتیلن (0/807 نانولیتر در لیتر در ساعت در هر گرم وزن تر)، نشت یونی (6/04 درصد)، MDA (12/53 نانومول در هر گرم وزن تر در دقیقه)، فعالیت آنزیم­ های SOD (12/64 واحد آنزیم در هر گرم وزن تر در دقیقه) و POD (0/09 نانومول در هر گرم وزن تر در دقیقه) برای تیمار "شکاف 5 سانتی­ متری× 20 میلی­ گرم در لیتر نانوسیلور" ثبت شد که موفق­ ترین تیمار در حفظ عمر گلجایی و خصوصیات بیوشیمیایی گل­ های شاخه بریده آلسترومریا‘Konst Coco’ بود. Manuscript profile -
Open Access Article
334 - Application of Microorganisms Compared with Nanoparticles of Silver, Humic Acid and Gibberellic Acid on Vase Life of Cut Gerbera Goodtimming
S. Ansari E. Hadavi M. Salehi P. MoradiGerbera one of 10 important cut flowers in the world and Iran. One of the most problems is low-life after harvest and neck bending. Producers want to increase longevity of these flowers with using chemical solutions. With the aim of achieving the best chemical treatment MoreGerbera one of 10 important cut flowers in the world and Iran. One of the most problems is low-life after harvest and neck bending. Producers want to increase longevity of these flowers with using chemical solutions. With the aim of achieving the best chemical treatments to increase flower vase life gerbera Goodtimming, nano silver (5 mg l-1), humic acid (50 mg l-1), gibberellic acid (2.5 mg l-1) and Lactobacillus plantarum 110 CFU m l-1 and Lactococcus lactis110 CFU ml-1 with sucrose (4%) compared with controls. This study in carried out with 6 replications. Cut flowers recutted to 35 ± 2 cm, and then tested in different solutions for 20 days. The results showed that silver nanoparticles (5 mg l-1) +sucrose 4%+gibberellic acid 2.5 mg l-1with the 19.5 days vase life compared with controls (17.67days) had the highest durability. Distilled water+ sucrose 4% with 5.98 mm stem diameter was better than control (5.49 mm) (P £0.01), while humic acid 50 mg l-1+ sucrose 4%+gibberellic acid 2.5 mg l-1 had lowest average daily stem diameter (5.44 mm), respectively. Highest water uptake observed in silver nanoparticles 5 mg l-1+sucrose 4%+gibberellic acid 2.5 mg l-1 treatment (8.78 ml g-1 F.W.). Silver nanoparticles 5 mg l-1+sucrose 4%+gibberellic acid 2.5 mg l-1 had highest fresh weight per day (24.89 g) and dry weight (4.96 g), respectively. Manuscript profile -
Open Access Article
335 - Improvement of CL soil engineering properties by using of silica and kaolinite nanoparticles
Moharram Majidi Ali Uromeihy Mohammad Reza Nikudel -
Open Access Article
336 - Experimental study of the nanoclays effects on soil permeability reduction to preparing Landfill liners vs leachate
Bagher Jafari Karim Abbasian -
Open Access Article
337 - Application of nanoclay filter to permeability reduction for bed soil from industrial effluent transmission channels (Case Study)
Bagher Jafari Karim Abbasian -
Open Access Article
338 - Investigating the Effect of Green Nanoparticles of Silver (AgNPs) and Gibberellic Acid (GA) on Some Morphophysiological and Germination Characteristics of (Astragalus Gossypinus Fisher)
Reza Dehghani BidgoliFor this purpose, this study was carried out with the aim of the best treatment for breaking the dormancy and improving the germination characteristics of white currant seed under the influence of various chemical and physical treatments. (Astraglus gossypinus) Fisher. MoreFor this purpose, this study was carried out with the aim of the best treatment for breaking the dormancy and improving the germination characteristics of white currant seed under the influence of various chemical and physical treatments. (Astraglus gossypinus) Fisher. Is one of the most valuable and productive plants of the highest quality gum, which is very important in protecting the soil and economy of the country. In order to investigate the effect of silver nanoparticle (AgNPs) and Gibberellic acid (GA) on (Astraglus gossypinus) germination, a factorial experiment was conducted in a completely randomized design (CRD) with 4 replications in 1397. Experimental treatments consisted of priming with gibberellic acid in 4 levels (0 as control, 100, 150 and 300 ppm) and silver nanoparticles in 4 levels (0 as control, 0.05, 0.1 and 0.2 W/V) for 4 hours at 25 ° C. The results of the experiments showed that gibberellic acid, silver nanoparticles, and interactions of treatments at 1% probability level on all studied traits including germination percentage, root length, stem length, germination coefficient, and relative water content, chlorophyll a, b and total chlorophyll were significant. Also, the use of 100 ppm gibberellic acid increased the root length by 25%, but with increasing gibberellic acid concentration, root and shoot length decreased compared to control. Manuscript profile -
Open Access Article
339 - The effects of silicate and silicon nanoparticles on seed germination and growth parameters of fenugreek (Trigonella foenum-graecum L.)
Sanam Nazaralian Ahmad Majd Saeed Irian Farrokh Ghahremaninejad Farzaneh Najafi Maria GregerThe addition of silica increase plant biomass growth. The aim of this study was to find out if silicate and nano silica (SiNP) influence the growth processes in fenugreek (Trigonella foenum-graecum L.) similarly. Plants were grown from seed with 0-2.5 mM of sodium silic MoreThe addition of silica increase plant biomass growth. The aim of this study was to find out if silicate and nano silica (SiNP) influence the growth processes in fenugreek (Trigonella foenum-graecum L.) similarly. Plants were grown from seed with 0-2.5 mM of sodium silicate and SiNP in hydroculture for up to 30 days. Germination, seedlings development and other growth parameters in fenugreek plantsas well as Si uptake was examined. The results showed that Si concentration in root and shoot increased with Si addition. Seed germination and vitality index increased with Si at day 4 after seeding, but the effect was then levelled out. Seedlings length and fresh weight (FW), whole plant length and leaf area increased while dry weight (DW) and DW: FW ratio of shoot and radicle length decreased with silicate and SiNP treatment. The root central cylinder increased in diameter in young roots and the lignified tissue of the endodermis cells increased in thickness. The effects by silicate and SiNP was similar but the increase in whole plant length and cell wall thickness and the decrease in DW: FW ratio of shoot and radicle length was slightly more pronounced with SiNP than with silicate.In conclusion, both silicate and SiNP in general have similar effects on plant growth and therefore SiNP can be used instead of silicate. Manuscript profile -
Open Access Article
340 - Evaluation of the protective effect of Nigella sativa oil on ovarian follicles in mice treated with silver nanoparticles
SMA shariatzadeh Mozhgan Khagavi JafarabadAim: the effect of Nigella sativa oil (NSO) as an efficient antioxidant on ovarian follicles following treatment with Silver Nanoparticles (SNP) in adult mice. Material and methods: Twenty-four adult NMRI mice, weighing 27-30g were used in the present experiment. The an MoreAim: the effect of Nigella sativa oil (NSO) as an efficient antioxidant on ovarian follicles following treatment with Silver Nanoparticles (SNP) in adult mice. Material and methods: Twenty-four adult NMRI mice, weighing 27-30g were used in the present experiment. The animals were kept under optimum conditions of temperature (At 21± 2 ° C and ambient lighting conditions 12 hours of darkness and 12 hours of light) humidity and maintained on standard pellet diet with adequate water. They were divided into four groups of (six mice per group): control; Silver Nanoparticles (300 mg/kg/day, orally), Nigella sativa oil (5 ml/kg/day, orally) and finally Silver Nanoparticles plus Nigella sativa oil. After 30 days, the mice were sacrificed and the ovary tissues were separated. The results were analyzed using one-way ANOVA and Tukey’s test, and the means were significantly different at P<0.05. Results: The results of this study showed that, the mean total volume of ovary and the number of primordial, primary, secondary and graph follicles significantly decreased in the Silver Nanoparticles group compared with the control group (p<0.05). Nigella sativa oil significantly increased the above parameters in the SNP +NSO group compared to silver nanoparticles group (p<0.05). Furthermore, the number of follicles and total volume of ovary significantly increased in the Nigella sativa oil treated mice compared to the control ones (p<0.05) (Table 1). Conclusion: So it is not far-fetched that this oil has improved the factors in our study. Manuscript profile -
Open Access Article
341 - Preparation and characterization of biodegradable magnetic nanoparticles biodegradable based on polyurethane for gene delivery into MCF-7 cells
Zhale Alirezazad hashem yaghoubi Somayeh Javid Zahra AjamThe folate receptor (FR) is known to be over-expressed extracellularly on a variety of human cancers. Therefore, this molecule is an ideal candidate for targeting nanoparticles to drug delivery using these nanoparticles to cancer cells or cancer tissues. In this study, MoreThe folate receptor (FR) is known to be over-expressed extracellularly on a variety of human cancers. Therefore, this molecule is an ideal candidate for targeting nanoparticles to drug delivery using these nanoparticles to cancer cells or cancer tissues. In this study, we designed an amphiphilic cationic Fe3O4-PEI-PU-PEG-FA nanoparticles. The prepared nanoparticles were characterized by FTIR, VSM, TEM measurements. FTIR indicated that the synthesis of Fe3O4-PEI-PU-PEG-FA nanoparticles have been performed successfully. Vibrating sample magnetometry (VSM) showed that the biodegradable-magnetic nanoparticles were superparamagnetic at room temperature. The morphology of the Fe3O4 and Fe3O4-PEI-PU-PEG-FA nanoparticles were evaluated using a transmission electron microscopy. TEM showed the nanoparticles were spherical in shape. Moreover biocompatibility assay of Fe3O4-PEI-PU-PEG-FA nanoparticles was performed using MTT test. Also the ability of Fe3O4-PEI-PU-PEG-FA nanoparticles to DNA delivery into MCF-7 cells were analysis using MTT test and flow cytometry respectively. Interestingly, due to the incorporation of PU and PEG segments, this Fe3O4-PEI-PU-PEG-FA nanoparticles showed less toxicity but better gene transfection efficiency than PEI. Manuscript profile -
Open Access Article
342 - Comparative investigation of cytotoxicity effects of iron oxide, zinc oxide and silver nanoparticles on white blood cells and leukemic cell line HPB-ALL in Vitro
Zahra Farahani Kazem Parivar nasim HAYATI Mona FarhadiTreatment with nanoparticles has attracted the attention of many researchers. Due to their small size and easy absorption, nanoparticles can be a suitable option for treatment. In this study, a comparative study of the anticancer effect of silver nanoparticles, zinc oxi MoreTreatment with nanoparticles has attracted the attention of many researchers. Due to their small size and easy absorption, nanoparticles can be a suitable option for treatment. In this study, a comparative study of the anticancer effect of silver nanoparticles, zinc oxide and iron oxide on leukemic cell line and white blood cells of HPB-ALL was done.Human white blood cells and leukemia cell line HPB-ALL were passaged. Iron oxide, zinc oxide and silver nanoparticles with different concentrations were added to the microplates containing the cells and the cells were treated with nanoparticles for 24 hours. PI was evaluated. The results obtained for leukemic cell line HPB-ALL and white blood cells were analyzed with the effect of three nanoparticles of silver, zinc oxide and iron oxide at a significant level (P<0.05). All three nanoparticles showed cytotoxic effects in both cell lines. The cytotoxicity effects of nanoparticles were higher in leukemic cell line HPB-ALL than in white blood cells. Among these nanoparticles, silver nanoparticles had a significant cytotoxic effect in HPB-ALL leukemic cell line compared to the other two nanoparticles. Evaluation of IC50, DNA damage and apoptosis induction in HPB-All leukemic cell line by silver nanoparticles was significantly higher than other two nanoparticles. According to the above results and further investigations of the penetration mechanism of each of the nanoparticles, it can be said that silver nanoparticles have the potential for therapeutic applications. Manuscript profile -
Open Access Article
343 - Ultra trace determination of Ranitidine in drinking water, tablet, serum (blood) , and human urine by a colorimetric method based on the aggregation of gold nanoparticles
maryam moradi mahmoodreza sohrabi saeed mortazavi nikAbstract: This research introduces a simple, sensitive, and rapid ultraviolet- visible spectrophotometry method for determination of ultra-trace amount of Ranitidine (RAN) in several sample such as drinking water, tablet, serum (blood), and human urine using gold nan MoreAbstract: This research introduces a simple, sensitive, and rapid ultraviolet- visible spectrophotometry method for determination of ultra-trace amount of Ranitidine (RAN) in several sample such as drinking water, tablet, serum (blood), and human urine using gold nanoparticles (AuNPs). The surface plasmon resonance (SPR) property of AuNPs and the interaction between RAN and AuNPs is the base of this method. The addition of RAN into AuNPs led to the aggregation of AuNPs. Transmission electron microscopy (TEM) proved aggregation of AuNPs in the presence of RAN. Also, the size of the nanoparticles distribution was evaluated by dynamic light scattering (DLS). The parameters that affect the absorbance such as pH, type and volume of buffer, AuNPs concentration, interaction time, ionic strength, and interfering ions were investigated and optimized. Linear range was obtained 25-300 μgL-1 in the optimum conditions. Also, the correlation coefficient (R2 =0.9955) and the limit of detection (LOD), and limit of quantification (LOQ) were equal to 1.45 μgL-1, and 1.63 μgL-1, respectively. In addition, the effect of interfering species was investigated. Eventually, the results showed that the proposed method had a high potential for rapid, sensitive, and accurate determination of RAN Manuscript profile -
Open Access Article
344 - Synthesis of cobalt ferrite nanoparticles and investigation of magnetic hyperthermia properties at different concentrations
Salah Khanahmadzadeh kamran heydaryanIn this paper, cobalt ferrite nanoparticles were synthesized using a co-precipitation method. The properties and characteristics of the cobalt ferrite nanoparticles were studied using XRD, VSM, and FESEM analyses. The FESEM images showed that the cobalt ferrite nanopart MoreIn this paper, cobalt ferrite nanoparticles were synthesized using a co-precipitation method. The properties and characteristics of the cobalt ferrite nanoparticles were studied using XRD, VSM, and FESEM analyses. The FESEM images showed that the cobalt ferrite nanoparticles had almost spherical morphology, and that the particle size distribution (determined with the help of Digimizer software) was in the range of 25–60 nm. Moreover, the average size of the nanoparticles was calculated to be in the range of 37-47 nm. The VSM results indicated superparamagnetic properties of the cobalt ferrite nanoparticles at room temperature. Besides, the saturation magnetization and coercivity were found to be 30 emu/g and 39 Oe, respectively. The specific loss power (SLP) was investigated by preparing ferrofluid concentrations of 3, 5, and 8 mg/ml under a magnetic field of 400 Oe and at a frequency of 400 kHz. In this case, the rate of the increase in temperature of the cobalt ferrite nanoparticles was measured in a certain period of time, and the related SLP was calculated. The results of the measurements showed that the highest rate of the heat generation occured at the concentration of 8 mg/ml, leading to an SLP value of 162 W/g. Manuscript profile -
Open Access Article
345 - Synthesis of copper magnetic nanocomposite based on nanofibrillated cellulose and investigation of its catalytic performance in reduction of dyes
Fatemeh Aliramezani Hannaneh HeidariIn this study, nanofibrillated cellulose (NFC) was used as a green and biodegradable material for the synthesis of copper magnetic nanocomposites without the addition of an external reducing agent or toxic solvents. Initially, nanofibrillated cellulose was magnetized fo MoreIn this study, nanofibrillated cellulose (NFC) was used as a green and biodegradable material for the synthesis of copper magnetic nanocomposites without the addition of an external reducing agent or toxic solvents. Initially, nanofibrillated cellulose was magnetized for easy separation using iron chlorides in ammonia medium, then used as a substrate and reducing agent for the formation of copper nanoparticles. The structure of the nanocomposite was characterized by various spectroscopic techniques including X‐ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared spectroscopy (FT-IR), Energy dispersive spectroscopy (EDS), and Inductively coupled plasma atomic emission spectroscopy (ICP-OES). The effect of nanocomposite drying methods such as freeze-drying and ambient temperature on catalytic activity was also studied. The results showed that the recyclable magnetic nanocatalyst Fe3O4@NFC/Cu in comparison with other reported catalysts had significant catalytic activity in degradation of three organic dyes (methyl orange, methylene blue, and 4-nitrophenol) with rate constants of 35.1×10-2 s-1 1.48×10-2 s-1 and 5.41×10-2 s-1, respectively. Also, this catalyst was recovered and used 4 times without significant loss of activity. Manuscript profile -
Open Access Article
346 - PEGylation of polyamidoamine-G3 dendrimer bonded with silica-coated magnetic nanoparticles as a pH-sensitive targeted drug delivery system
seyed esmaeil mhamadi mehr Mehdi Faramarzi seyed abotaleb mosavi parsaThis research, reports the fabrication of a new pH-responsive nanocarrier based on iron oxide nanoparticle with dendrimer coating and PEG conjugated for targeted and controlled delivery of chemotherapy drugs to cancer cells. The structure of the nanocarrier was confirme MoreThis research, reports the fabrication of a new pH-responsive nanocarrier based on iron oxide nanoparticle with dendrimer coating and PEG conjugated for targeted and controlled delivery of chemotherapy drugs to cancer cells. The structure of the nanocarrier was confirmed by Fourier transform infrared (FT-IR) spectra analysis. transmission electron microscope (TEM), Field Emission Scanning Electron Microscopy (FE-SEM) and vibrating sample magnetometer (VSM) analysis showed that the nanocarrier has a spherical structure with super paramagnetic properties. The efficiency of nanocarrier was evaluated with cyclophosphamide chemotherapy drug. The in vitro drug release studies at different pH proved the pH-sensitivity of the nanocarrier. Due to the open state of dendritic structure in acidic pH, the maximum release observed at pH 4.5 (lysosomal pH). Mass transfer studies showed that drug release from nanocarrier is rapid in short contact time and slow in long contact time. These results indicate that cyclophosphamide-loaded magnetic nanocarrier is promising for targeted delivery and controlled drug release. Manuscript profile -
Open Access Article
347 - Using of steel slag and waste rusted iron shavings for biosynthesis of nano zero-valent iron nanoparticles with magnetite coating
Saber Moosazadeh shahab shariaty Mohammad Yousefi Sahar Baniyaghoob Hassan KefayatiIn the present study, iron ions were prepared by chemical digestion from waste rusted iron shavings and steel slag. The zero-valent iron nanoparticles (nZVI) were synthesized by reduction of iron ions from steel scrap and steel slag with Camellia sinensis extract (tea) MoreIn the present study, iron ions were prepared by chemical digestion from waste rusted iron shavings and steel slag. The zero-valent iron nanoparticles (nZVI) were synthesized by reduction of iron ions from steel scrap and steel slag with Camellia sinensis extract (tea) and coated by magnetite (Fe3O4). For this purpose, the leaf extract of Camellia sinensis was extracted using microwave waves as an environmentally friendly method and used as a reducing agent for the synthesis of nZVI. Then, the magnetite coating was placed on the zero-valent iron core to create a magnetic property. The properties and morphology of synthetic magnetic nanoparticles were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). The specific surface area and magnetic property of the nanoparticles were determined by adsorption and desorption isotherms (BET) and vibrating sample magnetometry (VSM) as 3.59 m2 g-1 and 6.5 emu g-1, respectively. The results confirmed the formation of magnetite on the core of zero-valent iron nanoparticles and the average diameter of synthetic particles was estimated to be about 20 nm. Using waste and slag sources and using plant extract as a reducing agent lead the proposed method to be considered as a green and economical method for synthesizing the core-shell nanostructure of zero-valent iron nanoparticles with magnetite coating. Manuscript profile -
Open Access Article
348 - Thermal and corrosion behavior of epoxy resin cured by poly(xanthone-amide) with functionalized magnetic nanoparticle
ghasem rahpaimaDue to the desirable properties of poly xanthones, the present research investigates curing, thermal degradation and anticorrosion behavior of epoxy resin with poly(xanthone-amide) (PXAO) as curing agent, with melamine-functionalized Fe3O4 (m-Fe3O4) nanoparticles. Curin MoreDue to the desirable properties of poly xanthones, the present research investigates curing, thermal degradation and anticorrosion behavior of epoxy resin with poly(xanthone-amide) (PXAO) as curing agent, with melamine-functionalized Fe3O4 (m-Fe3O4) nanoparticles. Curing kinetics of the systems were dynamically studied using differential scanning calorimetry (DSC). Kinetic parameters including activation energy (Ea) and rate constant (K) were calculated using Kissinger’s method and Ozawa-Flynn-Wall equation. Mass reduction behavior (including mass reduction temperatures and Ea) and thermal stability were characterized using thermogravimetric analysis (TGA). The results indicated higher activation energy and residual degradation (from 35% to 43%) at 750℃ in nitrogen atmosphere in the systems containing nanoparticles, as compared to the systems without the m-Fe3O4 nanoparticles. Results of potentiodynamic polarization tests to evaluate corrosion performance of the resin epoxy-coated stainless steel, showed that the PXAO had improved the anticorrosion activity of epoxy resin. Moreover, introduction of the m-Fe3O4 nanoparticles to the curing mixture significantly increased anticorrosion behavior of the epoxy resin by enhancing the paths through which water and oxygen could diffuse. Manuscript profile -
Open Access Article
349 - Preconcentration and determination of Pb(II) using magnetic nanoparticles coated with DABCO-PDO ionic liquid with FAAS in aqueous samples
sara khodadadi elahe konoz ali niazi ali ezabadiIn this study, magnetic nanoparticles modified with DABCO-PDO ionic liquid were used to preconcentration and determination of trace amount of Pb(II) in aqueous samples using a flame atomic absorption instrument. Experimental factors affecting Pb(II) extraction and preco MoreIn this study, magnetic nanoparticles modified with DABCO-PDO ionic liquid were used to preconcentration and determination of trace amount of Pb(II) in aqueous samples using a flame atomic absorption instrument. Experimental factors affecting Pb(II) extraction and preconcentration were investigated and optimized. The calibration curve for Pb(II) was linear under the optimum condition in the concentration range of 0.8-1.6 µg l-1 with the determination coefficient of 0.9986. The concentration factor of Pb(II) was 100 with the detection limit of 0.25 µg l-1. The relative standard deviations (RSD %) for the concentration of the method were 1.8 and 2.5, respectively, with 4 successive replications in one day and between days. Lead determination was successfully applied for aqueous samples (rainwater in Tehran, tap water in Shahrak Gharb, Tehran, and mineral water). Recoveries in the ranges 90.6-97.8 was reported. Structure and morphology of the synthesized nanosorbent were investigated by using Fourier transform infrared spectroscopy (FTIR) analysis, scanning electron microscopy (SEM), and X-ray powder diffraction (XRD). Manuscript profile -
Open Access Article
350 - Efficient removal of copper ions from aqueous medium using a green synthesis of silver nanoparticles mediated by Mentha spicata leaf extract combined with electrospun polyamide 6 nanofibers: Isotherm and kinetics adsorption study
Shima Mahdavi Ghajari Mohammad Reza Allah Gholi Ghasri Sajjad Sedaghat Forogh Adhami Sima HabibiIn this study, the efficient and fast adsorption of copper ions on silver/polyamide 6 (Ag/PA 6) nanofibers from an aqueous solution were investigated. Green synthesis of silver nanoparticles (AgNPs) was obtained from the leaf extract of the Mentha spicata. The character MoreIn this study, the efficient and fast adsorption of copper ions on silver/polyamide 6 (Ag/PA 6) nanofibers from an aqueous solution were investigated. Green synthesis of silver nanoparticles (AgNPs) was obtained from the leaf extract of the Mentha spicata. The characterization of synthesized AgNPs was investigated by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). Also, polyamide 6 and silver-polyamide 6 nanofibers were analyzed with a scanning electron microscope. To optimize the experimental factors, one factor at a time (OFAT) was used. The maximum removal percentage was obtained at pH equal to 5, contact time of 75 min, the adsorbent dosage of 2 g, and initial concentration of 20 mg/L. The isotherm models showed that the Langmuir isotherm with the coefficient of determination (R2) equal to 0.9976 was chosen as the best fitting model to describe the adsorption process. The maximum adsorption capacity (qmax) was obtained at 71.42 mg/g. In addition, the pseudo-second-order kinetic model showed a better fit for the removal of copper ions (R2=0.9994). The results showed that Ag/PA 6 can be used as a simple, efficient and environmentally friendly adsorbent to remove pollutants such as heavy metals from aqueous environments. Manuscript profile -
Open Access Article
351 - Optimization and Characterization of Plant-Mediated Green Synthesis of Copper Oxide Nanoparticles Using Leaf Aqueous Extract of Hibiscus Sabdariffa L.
sahar sadegnia ebrahim molashahi alireza einali omid azizian sharmePhysical and chemical methods for synthesis of nanoparticles are not cost efficient. Present study is the first report to phytosynthesis of Copper Oxide nanoparticles using leaf aqueous extract of Hibiscus sabdariffa L. In this research, 2 ml of extract was added to 4 m MorePhysical and chemical methods for synthesis of nanoparticles are not cost efficient. Present study is the first report to phytosynthesis of Copper Oxide nanoparticles using leaf aqueous extract of Hibiscus sabdariffa L. In this research, 2 ml of extract was added to 4 ml of CuCl2.2H2O with concentration 10 mM. In order to obtain nanoparticles with uniform shape and size, the parameters affecting to synthesis, such as: pH of reaction, volume and concentration of extract, concentration of Copper salt and time of reaction were studied and all of them were optimized by UV-Vis spectrophotometry technique. Transmission Electron Microscopy (TEM) and Fourier Transformation Infra-Red (FT-IR) spectroscopy were used for investigated the shape and size of nanoparticles and detection the functional groups involved in the synthesis and stabilization Copper Oxide nanoparticles respectively. Results showed that the extract of Hibiscus sabdariffa L. can reduces the Cu 2+ ions to Cu 0 atoms with nano metric size and the color of solution changed to green. The TEM image of CuO NPs showed that the average size was between 10-20 nm and all of them had spherical shape. Also, the best condition for the synthesis of Copper Oxide nanoparticles were at: pH= 8, 9 mL of extract with concentration of 5% and CuCl2.2H2O with concentration of 10 mM and these nanoparticles were very stable in 6 days after synthesis. Manuscript profile -
Open Access Article
352 - Biosynthesis of iron oxide nanoparticles using aqueous extract of Opuntia Cactus and its application in the synthesis of pyrimidine derivatives
Maryam Jahandar Lashaki Rahimeh Hajinasiri Zinatossadat Hossaini Navabeh NamiIn recent years, the green method, especially using plant extracts, has attracted much attention for synthesis of metal nanoparticles. In this study, biosynthesis of magnetic iron oxide nanoparticles (Fe­3O4-NPs) was performed using an aqueous extract of Opuntia Cac MoreIn recent years, the green method, especially using plant extracts, has attracted much attention for synthesis of metal nanoparticles. In this study, biosynthesis of magnetic iron oxide nanoparticles (Fe­3O4-NPs) was performed using an aqueous extract of Opuntia Cactus. Plant extract had a reducing and stabilizing role in the nanoparticle synthesis process. The structure and morphology of synthesized Fe­3O4-NPs were confirmed with X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared Fourier transform spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometry (VSM). The obtained results showed that the proposed method presented a synthesis of magnetic Fe3O4-NPs with a spherical shape and average size of 9.7 nm. Also, pyrimidine derivatives were synthesized by a one-pot three-component reaction between aromatic aldehydes, acetoacetanilide and urea or thiourea in the presence of prepared magnetic Fe­3O4-NPs as a catalyst in ethanol at room temperature. Short reaction time, easy purification steps, and high efficiency are the advantages of this method. Manuscript profile -
Open Access Article
353 - Preparation of Double-layer Nanofibers Base on Hydrogel, Silver nanoparticles, and Fatty Acid using electrospinning technique
ensieh ghasemian lemraski elaheh khajehali sahar yariToday, electrospinning method is widely used to produce nanofibers based on polymers. Poly (vinyl-alcohol) and chitosan are among the most widely used polymers in biochemistry and medicine, especially in wound healing and tissue engineering. In this project, an attempt MoreToday, electrospinning method is widely used to produce nanofibers based on polymers. Poly (vinyl-alcohol) and chitosan are among the most widely used polymers in biochemistry and medicine, especially in wound healing and tissue engineering. In this project, an attempt has been made to make polymeric materials and silver nanoparticles, nanofibers with protection and antimicrobial capabilities. Electrospinning method for making bilayer nanofibers, top layer containing poly (vinyl alcohol) and chitosan containing silver nanoparticles or silver ions as antimicrobial layer, and bottom layer containing polyvinylpyrrolidone and fatty acid as layer Moisturizes the skin of injured skin. Morphology and structure of nanofibers produced using various methods such as XRD X-ray spectroscopy, FTIR infrared Fourier transform spectroscopy, thermal weighing method or TGA, X-ray energy diffraction spectroscopy (EDAX-EDS), electron microscopy method (SEM), and finally the transmission electron microscopy (TEM) method was examined. The results of the instrumental analysis indicate the production of polymer fibers with a diameter in the range of 200-500 nanometers, which indicates the successful production of nanofibers, and also structural analyzes confirm the presence of silver nanoparticles and silver ions. The results of microbial tests show that nanofibers containing silver ions have a greater antimicrobial effect than silver nanoparticles. Manuscript profile -
Open Access Article
354 - The Study of the effect of nanographene and nanographene oxide on physical and mechanical properties of natural rubber nanocomposites
Bagher Mohammadi Fahimeh NoriIn this work, natural rubber (latex) nanocomposites were prepared by adding reduced graphene oxide and graphene oxide nanoparticles to the pristine latex. Then some physical and mechanical properties of these nanocomposites were investigated. These properties included t MoreIn this work, natural rubber (latex) nanocomposites were prepared by adding reduced graphene oxide and graphene oxide nanoparticles to the pristine latex. Then some physical and mechanical properties of these nanocomposites were investigated. These properties included tensile strength at peak point, tensile strength at breaking point, tensile percentage, surface cohesion, and rheometry. The experimental results of these nanocomposites were compared with those of natural rubber. The results showed that nanocomposites containing graphene oxide were much more desirable in terms of physical and mechanical properties than nanocomposites containing reduced graphene oxide. Both of these nanocomposites had better results in terms of physical and mechanical properties than pristine natural rubber. The FESEM images showed that the surface of samples which containing nanographene, had better uniformity and adhesion than those of the original latex. The surface adhesion of nanocomposites, containing nanographene oxide was much better and more desirable comparing to the others. Manuscript profile -
Open Access Article
355 - Biosynthesis and characterization of silver nanoparticles using aqueous extract of walnut (Juglans regia L.) leaf
masoud bayat reza moradi ali bodaghiGreen synthesis of nanoparticles is an environmentally friendly method, in which water solvent are used. In this study, the biosynthesis of silver nanoparticles (Ag-NPs) was performed by using walnut (Juglans regia L.) leaf extract. Walnut leaf contains a variety of che MoreGreen synthesis of nanoparticles is an environmentally friendly method, in which water solvent are used. In this study, the biosynthesis of silver nanoparticles (Ag-NPs) was performed by using walnut (Juglans regia L.) leaf extract. Walnut leaf contains a variety of chemicals, including tannins, flavonoids, vitamins, plant acids and naphthoquinone. The extract of walnut (Juglans regia L.) leaf as the reducing agent is used for the synthesis of silver nanoparticles. The silver nanoparticles have been characterized by scanning electron microscopy (SEM), Energy dispersive X-ray (EDAX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and UV-Visible spectroscopy. UV-Vis spectrum exhibit an absorption band at around 400-450 nm suggestion the formation of silver nanoparticles. The observed peak at about 425 nm is related to the surface plasmon resonance of silver nanoparticles. The effects of operational parameters in the synthesis of silver nanoparticles such as silver nitrate salt concentration, extract volume, temperature and time was studied. The results showed that silver nitrate concentration 6 mM, extract volume 200 µlit, temperature 90°C and time 40 min was the optimum amounts. Manuscript profile -
Open Access Article
356 - Construction of electrochemical nanosensor based on modified glassy carbon electrode with holmium oxide and carbon nanotubes for determination of efavirenz as a HIV drug
Mohammad Mehdi ForoughiSince monitoring of drug metabolism and drug quality control plays an important role in human health, development of easy, correct, and sensitive methods for the detection of active ingredients is important. In the present study, Ho2O3 nanoparticles were synthesized by MoreSince monitoring of drug metabolism and drug quality control plays an important role in human health, development of easy, correct, and sensitive methods for the detection of active ingredients is important. In the present study, Ho2O3 nanoparticles were synthesized by thermal decomposition method. The morphology and purity of synthesized nanoflowers are characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectrometer (EDX). Then, holmium oxide nanoparticles and carbon nanotubes nanocomposite used as a modifier for preparation of modified electrode. Electro-oxidation of efavirenz at the modified electrode was studied using cyclic voltammetry, chronoamperometry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Under optimized conditions, the peak current of differential pulse voltammetry was increased with increasing concentration of efavirenz in the range 0.01 to 500.0 μM. The detection limit of efavirenz was obtained 4.7 nM. In addition, a modified electrode was used to determination of efavirenz in real samples. Manuscript profile -
Open Access Article
357 - Preparation and evaluation of polyvinyl alcohol nanocomposite containing zinc oxide nanoparticles and montmorillonite
Negar Motakef Kazemi elaheh mollaakbari Raheleh HalabianThe purpose of this research is to investigate the mechanical, antibacterial, and cytotoxic properties of biocompatible polyvinyl alcohol (PVOH) nanocomposite modified with zinc oxide (ZnO) nanoparticles and montmorillonite (MMT) to prepare a film for use in food packag MoreThe purpose of this research is to investigate the mechanical, antibacterial, and cytotoxic properties of biocompatible polyvinyl alcohol (PVOH) nanocomposite modified with zinc oxide (ZnO) nanoparticles and montmorillonite (MMT) to prepare a film for use in food packaging. Zinc oxide nanoparticles were synthesized by hydrothermal method via chemical reduction process. This method was performed using zinc acetate salt as a metal precursor, soda as reductant and water as a solvent for 1 hour at a temperature of 80°C. The samples were characterized by X-ray diffraction (XRD) to evaluate the crystal structure, and field emission scanning electron microscope (FESEM) to check the size of the particles and morphology of the samples. The mechanical properties of the samples were investigated. The obtained results showed that the moisture content in the optimal film was reduced to 1.01 x 10-8 g/m3 and the tensile strength and Young's modulus were increased to 0.492 MPa and 24.1 Pa, respectively. The antibacterial activity against Escherichia coli was evaluated by the agar well method and the final nanocomposite showed the highest antibacterial property with the non-growth halo of 0.64 mm. Cytotoxicity of the samples was recorded using the MTT assay method on the HEK293 cell line after 1, 3, and 5 days. The highest percentage of normal cell viability was observed at the concentration of 0.25 mg/ml of the sample and the final nanocomposite showed the highest cell viability. Based on the obtained results, nanocomposite containing zinc oxide nanoparticles and montmorillonite can have a good potential for use in food packaging industries. Manuscript profile -
Open Access Article
358 - Application of Nano Hydrogels In Improving The Performance Of Wound Dressings and Drug Delivery: A Review Study
MohammadHossein Karami Majid Abdouss MohammadReza Kalaee Omid MoradiOne of the most common clinical diseases is skin scarring, which is defined as damage to the structure or integrity of skin tissue. Nanohydrogel can help in sustained release of drug by entrapping drug or loading drugs and thus promote wound healing. A hydrogel is a thr MoreOne of the most common clinical diseases is skin scarring, which is defined as damage to the structure or integrity of skin tissue. Nanohydrogel can help in sustained release of drug by entrapping drug or loading drugs and thus promote wound healing. A hydrogel is a three-dimensional hydrophilic network that is insoluble in water or aqueous solutions and is able to absorb water or other biological fluids that can promote wound healing. Various nano hydrogels have been designed to improve the design of wound dressings, and nano hydrogels are also used in drug release. The advantage of hydrogels over traditional wound dressings is their ability to improve the wound and the wound healing process. Hydrogels meet most criteria for modern wound dressings due to their unique properties. Among the unique properties of nano-hydrogels, we can mention the ability to absorb wound secretions, maintain a moist environment, gas exchange, remove the dressing from the wound surface without pain and replace the dressing for the patient, ease of movement for surgery. In this research, an overview of the use of nano-hydrogels in improving the performance of wound dressings and drug delivery, along with the investigation of antibacterial properties, introduction of commercial wound dressings and wound healing mechanisms, has been discussed. Manuscript profile -
Open Access Article
359 - Optimization of operating conditions and the role of ultrasound waves in the green synthesis of silver nanoparticles using apple tree leaf extract
Sarvin Mohammadi-Aghdam Omid AhmadiApple tree leaf extract is one of the effective materials in the synthesis of AgNPs, the results of FTIR spectroscopy showed the presence of several reducing agents. AgNPs were synthesized by mixing 2 ml of extract with 8 ml of AgNO3 solution based on the design of the MoreApple tree leaf extract is one of the effective materials in the synthesis of AgNPs, the results of FTIR spectroscopy showed the presence of several reducing agents. AgNPs were synthesized by mixing 2 ml of extract with 8 ml of AgNO3 solution based on the design of the experiment by surface response methodology in the heating temperature range of 30-70 °C and ultrasound time of 5-25 min. After the optimization, the results showed that the temperature of 52 °C and the duration of 15 min was the most suitable mode for the synthesis of AgNPs, in which the highest concentration was 27.10 ppm, the lowest average particle size was 66 nm, and the highest antioxidant property was 31.48. %. The results of UV-Vis spectroscopy and DLS analysis were confirmed at the optimum point with a slight difference, and the PDI and zeta potential were obtained as 0.397 and 21.2 mV, respectively. AgNPs showed good antibacterial properties against Staphylococcus aureus and Escherichia coli with halo diameters of 56 and 48 mm, respectively. The antifungal property of nanoparticles was 72%. Manuscript profile -
Open Access Article
360 - Targeted delivery of Elesclomol to colorectal cancer using a drug delivery system based on magnetic mesoporous silica nanoparticles
Mojtaba Tarin Maryam Babaei Hossein Eshghi Maryam Matin Amir Shokooh SaljooghiIn this research, the targeted delivery of elesclomol to colorectal cancer cells was explored through the development of magnetic mesoporous silica nanoparticles (MMSNs) loaded with elesclomol and surface modification with gold gatekeepers, bifunctional polyethylene gly MoreIn this research, the targeted delivery of elesclomol to colorectal cancer cells was explored through the development of magnetic mesoporous silica nanoparticles (MMSNs) loaded with elesclomol and surface modification with gold gatekeepers, bifunctional polyethylene glycol (PEG) polymer, and epithelial cell adhesion molecule (EpCAM) aptamers to improve drug delivery performance. The physicochemical properties of nanocarriers were characterized and the cellular toxicity of elesclomol, and nano-delivery system with and without EpCAM aptamer modification has been investigated in vitro. High resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM) showed that MMSNs had a uniform spherical morphology with a diameter of 19 nm and a negative surface charge. Elesclomol was successfully encapsulated in the open porous structure of the nanocarrier. The encapsulation efficiency (EE) and drug loading capacity (LC) were about 88% and 39%, respectively. Moreover, the prepared Au-ELC-MMSN-NH2 displayed pH responsive and sustained drug release within 96 h. Targeted nano-delivery systems were prepared with a final diameter of 89 nm and a negative surface charge. The MTT assay revealed that the targeted nano-delivery system induced highly effective cytotoxicity on colorectal cancer cells-expressing EpCAM aptamer (HT-29) compared to the CHO cells. This engineered nano-platform is a promising elesclomol replacement therapy for colorectal cancer. However, further experiments are required before it can be practiced in the clinic. Manuscript profile -
Open Access Article
361 - Removal of some textile cationic dyes from industrial wastewater using modified gamma alumina nanoparticles
Masoud Saadati Mortaza Iranifam Seyyed Iman MosaviThe present study deals with the removal of two cationic dyes from aqueos solutions by surfactant-modified gamma alumina nanoparticles. The nanoparticles were synthesized by sol-gel method and after modifying with sodium dodecyl sulfate (SDS), an anionic surfactant, had MoreThe present study deals with the removal of two cationic dyes from aqueos solutions by surfactant-modified gamma alumina nanoparticles. The nanoparticles were synthesized by sol-gel method and after modifying with sodium dodecyl sulfate (SDS), an anionic surfactant, had been successfully performed to remove basic brown 1 (BB1) and basic red 46 (BR46) from textile industrial effluents. The SEM images, FTIR spectra, and XRD patterns showed a successful synthesis of the nanoparticles followed by surface modification. The relationships between different condition factors (contact time, concentration of dyes, amount of adsorbent, and pH) were investigated by response surface methodology (RSM). The optimal conditions were determined to be a contact time of 15 minutes, pH of 6, initial concentrations of 27.5 mg/l and 41.6 mg/l for BB1 and BR46, respectively; and adsorbent doses of 0.030g and 0.035 g for BB1and BR46, respectively. The effect of other parameters including temperature and interfering species on the removal of dyes were also investigated and the dye removal obtained under optimal conditions were 93.12% for BB1 and 97.34% for BR46. The obtained results showed that the removal of dye with modified nanoparticles was better than unmodified nanoparticles. Manuscript profile -
Open Access Article
362 - Electrocatalytic activity of Pt/C nanocatalyst stabilized by different amounts of sodium citrate in oxygen reduction reaction
Kulthum Mehrabinejad Mehdi KheirmandIn the present study, Pt(20wt%)/C electrocatalysts for oxygen reduction reaction in the cathode of fuel cells were synthesized with different amounts of trisodium citrate as stabilizing agent, to achieve higher efficiency of platinum electrocatalyst. The electrocatalyst MoreIn the present study, Pt(20wt%)/C electrocatalysts for oxygen reduction reaction in the cathode of fuel cells were synthesized with different amounts of trisodium citrate as stabilizing agent, to achieve higher efficiency of platinum electrocatalyst. The electrocatalysts containing platinum and trisodium citrate with ratios of 1:12, 1:9, 1:6, and 1:3 (Pt/C:TC) were prepared by using the saturation-reduction method. To evaluate the oxygen reduction reaction in the cathode catalyst layer in an acidic environment cyclic voltammetry (CV), linear sweep voltammetry (LSV), rotating disk electrode (RDE), and finally electrochemical impedance spectroscopy (EIS) techniques were applied. Also, morphology of the catalysts was studied with scanning electron microscopy (SEM). The results showed that the efficiency of the synthesized electrocatalysts at a ratio of 1:3 (Pt/C:TC) was better for oxygen reduction. It also had lower charge transfer resistance, more suitable distribution, and higher electrochemically active surface area (14.7 m2gPt). In addition, the number of electrons involved in the oxygen reduction reaction was calculated to follow the four-electron pathway for the electrocatalyst prepared at ratio of 1:3. Manuscript profile -
Open Access Article
363 - Continuous and controlled production of dexamethasone nanoparticles in a microfluidic system
payam zahedi maryam tabatabai morteza fathi pour amin sohrabiThe aim of this work is to produce continuously dexamethasone nanoparticles (DEX NPs) in a microfluidic (MF) system via nanoprecipitation method to control particle size, possessing their physical structure, and enhancing the efficiency of this hydrophobic drug in physi MoreThe aim of this work is to produce continuously dexamethasone nanoparticles (DEX NPs) in a microfluidic (MF) system via nanoprecipitation method to control particle size, possessing their physical structure, and enhancing the efficiency of this hydrophobic drug in physiological environments. In order to fabricate a MF chip, a series of microchannels with dimensions 1 cm in length, 200 μm in width, and 50 μm in depth are embedded using ultraviolet soft lithography on a sheet based on polydimethylsiloxane (PDMS), and then the laminar fluid flow ability is investigated through it. The effective factors on the optimized production of the drug NPs are determined by the design of experiment. In this line, the optimum values for drug solution concentration, surfactant concentration, drug solution flow rate, and non-solvent flow rate are 15 mg/ml, 1 mg/ml, 4.5 ml/h, and 8 ml/h, respectively. By adjusting these values the average sizes of DEX NPs are obtained 590 ± 20 nm based on the model and 500 ± 20 nm according to the experiments. In the following, the results of dynamic light scattering (DLS) test show the narrow size distribution of DEX NPs fabricated using the MF chip. Also, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD) assays reveal that application of the MF system does not affect the crystallinity of the drug NPs and does not alter their structure after the process. Finally, MF-assisted DEX NPs sample shows the drug solubility rate of about 8-fold compared to the commercial powder ones Manuscript profile -
Open Access Article
364 - Effects of adding silver nanoparticles on thermal conductivity and viscosity of poly-alpha-olefin fluid
حمیدرضا قربانی سید کمیل حسینی اسفندانیIn this work, the silver nanoparticles effects on viscosity and thermal conductivity of silver-poly alpha olefin nanofluid were studied. Silver nanoparticles in different sizes and with various concentrations spread over the base fluid of poly alpha olefin and thermal c MoreIn this work, the silver nanoparticles effects on viscosity and thermal conductivity of silver-poly alpha olefin nanofluid were studied. Silver nanoparticles in different sizes and with various concentrations spread over the base fluid of poly alpha olefin and thermal conductivity were studied. Also, thermal conductivity was measured at different temperature conditions. In addition, the impact of nanoparticles on the viscosity of the fluid was measured at different concentrations. The thermal conductivity and viscosity of nanofluids increase with increasing volumetric concentration of silver nanoparticles. In addition, the thermal conductivity of nanofluid increases and the viscosity of nanofluid decreases with increasing temperature. Also, the thermal conductivity decreases with increasing nanoparticles size. Manuscript profile -
Open Access Article
365 - Methylene blue removal in a batch reactor using synthesized CdO nanoparticles
Kasra Behzad Parisa Attarzade Afarin BahramiIn the present research, CdO nanoparticles were synthesized using the chemical reduction method at six different temperatures. Due to have different calcination temperature, the nanoparticle were synthesized in different sizes. Structural and optical properties of nanop MoreIn the present research, CdO nanoparticles were synthesized using the chemical reduction method at six different temperatures. Due to have different calcination temperature, the nanoparticle were synthesized in different sizes. Structural and optical properties of nanoparticles were characterized using XRD and UV-Vis spectroscopy. Based on the results, the CdO nanoparticles have cubic structure with the particles size of 27 – 60 nanometer. To investigate the photocatalytic properties of CdO nanoparticles, dye degradation effect in the presence of CdO nanoparticles and UV beam was study in a batch reactor as a function of time at three different pH values. Studies have shown that the optical absorption was decrease as a function of time. The photocatalytic reaction revealed that the dye degradation in methylene blue was speeded up with increasing the pH value. Manuscript profile -
Open Access Article
366 - Synthesis and characterization of polyindole/silver nanoparticles nanocomposite and its application in the design of electrochemical sensor L-Cysteine
خدیجه قنبری زهرا بابایی سپیده بنیادیIn this study, an effective electrochemical sensor for the rapid measurement of L-cysteine based on glassy carbon electrode modified with polyindole/silver nanoparticles nanocomposite is presented. Polyindole nanofibers were synthesized by cyclic voltammetry method at t MoreIn this study, an effective electrochemical sensor for the rapid measurement of L-cysteine based on glassy carbon electrode modified with polyindole/silver nanoparticles nanocomposite is presented. Polyindole nanofibers were synthesized by cyclic voltammetry method at the glassy carbon electrode surface, and then silver nanoparticles were deposited on these nanofibers using a constant potential method. Surface morphology and characterization of the modified electrodes were confirmed by field emission scanning microscopy (FE-SEM), X-ray diffraction (XRD), Raman, and FT-IR spectroscopies. The electrochemical investigation showed that the polyindole/silver nanoparticles had very good efficiency with respect to the electrocatalytic oxidation of L-cysteine in phosphate buffer solution (pH = 7.0). The response of the glassy carbon electrode/polyindole/silver nanoparticles to L-cysteine was linear in the concentration range of 0.01-10 mM. The detection limit was obtained at signal/noise=3, 5.7 μM. In addition, the sensor showed good stability and repeatability. The application of the proposed sensor for the analysis of L-cysteine in human serum was successful. Manuscript profile -
Open Access Article
367 - Simultaneous study of the effects of nano-aluminum admixture and mixing process on the thermal behavior of the thermite mixture containing copper oxide
سید قربان حسینی زهرا جوانی علی شیخ پور منوچهر فتح الهی سعید توانگر روستاIn this work, the effects of the nano-aluminum additive and mixing process on the thermal behavior of Al/CuO systems were verified by thermal analysis and field emission scanning electron microscope (FE-SEM( methods. The DSC analysis results showed that there was no exo MoreIn this work, the effects of the nano-aluminum additive and mixing process on the thermal behavior of Al/CuO systems were verified by thermal analysis and field emission scanning electron microscope (FE-SEM( methods. The DSC analysis results showed that there was no exothermic reaction for μm-Al/nm-CuO thermite mixture. However, the ignition of [μm-Al95%+nm-Al5%]/nm-CuO, [μm-Al80%+nm-Al20%]/nm-CuO, [μm-Al50%+nm-Al50%]/nm-CuO and nm-Al/nm-CuO took place at 600.9, 604.0, 605.5 and 608.4°C, respectively. Analysis of thermal behavior of these mixtures showed that the insensitivity and energy of the thermites increased with increasing quantity of nm-Al in [μm-Al+nm-Al]/nm-CuO formulation. Moreover, ultrasonic mixing decreased ignition temperature and increased heat of reaction of these ternary mixtures. This improvement in thermal properties was related to break up the agglomerates and better mixing quality by ultrasonic waves. In the next step, the reaction kinetics of physically mixed and ultrasonicated nm-Al/nm-CuO were investigated. The results revealed that sonicated nm-Al/nm-CuO thermite had lower activation energies than physically-mixed nm-Al/nm-CuO mixture. In addition, the ignition of ultrasonicated and physically-mixed nm-Al/nm-CuO mixtures occurred in one and two main steps, respectively. Manuscript profile -
Open Access Article
368 - Investigation of anti -wear effect of magnetic iron oxide nanoparticles in multi-grade engine oil compared to conventional engine oil
فرشته قربانی نایینی حمیدرضا اسکندری داود ابراهیمیIn this study, the performance of anti-wear in engine oil which contain nanomaterial additive has been compared and evaluated to conventional engine oil, by using laboratory tests. For this purpose, magnetic iron oxide nanoparticles (Fe3O4) as a nanomaterial additive we MoreIn this study, the performance of anti-wear in engine oil which contain nanomaterial additive has been compared and evaluated to conventional engine oil, by using laboratory tests. For this purpose, magnetic iron oxide nanoparticles (Fe3O4) as a nanomaterial additive were selected to use in Iranol Racing engine oil, SAE 10W40. At first the stability of the nano-fluid, obtained by the nanoparticles, was confirmed by using UV and zeta potential devices. The iron oxide nanoparticles were characterized by scanning tunneling microscopy (STM), energy dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR). The nanoparticles have a diameter in the range of 8-13 nm. Size distribution of nanoparticles by dynamic light scattering (DLS) was also investigated. Anti-wear performance of Fe3O4 nanoparticles in multi-grade engine oil was evaluated by means of the four ball and falex test. The results generally indicate the improvement of anti-wear performance engine oil which was prepared by adding nanoparticles. Magnetic iron oxide nanoparticles with concentration of 0.1 percent, increase weld strength from76.32 to 92.74 kgf and load wear index (LWI) from 250 to 315 kgf, in the four ball test. Additionally it has increased the falex test results (linear load carrying) from 1160 to 1220 lbf, compared to conventional engine oil. Manuscript profile -
Open Access Article
369 - Vanadium cross-linked CMC-PEG-PLGA based on nanocomposite hydrogel with sodium alginate coating as a pH-sensitive insulin delivery system
Seyyed Nabiollah Hosseini Asieh Abbassi Dolavi Seyed Javad Zia-e-Haq Ayyub Saeedi: In recent years, significant advances have been made in the use of biomedical polymers as targeted carriers for the release of drugs, proteins, and growth factors. Vanadium (V) nanocomposite hydrogels were prepared in this study due to the formation of vanadium nanopa More: In recent years, significant advances have been made in the use of biomedical polymers as targeted carriers for the release of drugs, proteins, and growth factors. Vanadium (V) nanocomposite hydrogels were prepared in this study due to the formation of vanadium nanoparticles inside the swollen CMC hydrogels. The formation of vanadium (V) nanoparticles in hydrogels has been studied using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM) experimental techniques. The XRD patterns analysis confirmed the formation of vanadium nanoparticles in a hydrogel matrix, and scanning electron microscopy micrographs also showed that the size of the nanoparticles was from 22 to 74 nm in the hydrogel matrix. The swelling behavior of nanocomposite hydrogels was studied at pH of 2.1 and 7.4. Hydrogels have shown better water absorption in less pH. Fourier transform infrared spectroscopy indicates the interaction between polysaccharides and the samples taken from the drug indicate that the drug-loaded peaks were loaded appropriately. With the release of drug from nanocomposite and pure hydrogel hydrogels, it was observed that its release rate in nanocomposite hydrogels was lower and the amount of its release decreased with increasing percentage of nanoparticles. In the cytotoxicity test after 24 h, the cell viability was in the range of 74.35% -96.05% (compared with the control sample, which was 100%). In the hydrogel nanocomposite sample containing insulin had the lowest cell viability of insulin 31.25 μg/ml after 24 h and it had the highest cell viability at 1000 (μg/ml) concentration with 25.7% cell cytotoxicity compared to the control group. Manuscript profile -
Open Access Article
370 - Green synthesis of Ag nanoparticels using salvia hydrangea extract and Peach kernel shell as a natural valuable support: Investigation of catalytic activity in reduction of methylene Blue and Rhodamine B
بهار خدادادیIn these research, the green synthesis of Ag nanoparticles )AgNPs( and AgNPs/Peach kernel shell )Ag/ P.K. Shell(, using peach kernel shell as an environmentally benign support and Salvia hydrangea extract as the reducing agent in the absence of any stabilizer or surfact MoreIn these research, the green synthesis of Ag nanoparticles )AgNPs( and AgNPs/Peach kernel shell )Ag/ P.K. Shell(, using peach kernel shell as an environmentally benign support and Salvia hydrangea extract as the reducing agent in the absence of any stabilizer or surfactant is reported. Samples were characterized by Fourier Transform Infrared spectroscopy )FTIR(, UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy )FE-SEM( equipped with an energy dispersive spectroscopy )EDS(, Elemental mapping, X-ray Diffraction analysis )XRD(, and Transmittance Electron Microscopy )TEM(. These synthesized catalysts were used in the reduction of Methylene Blue )MB( and Rhodamine B )RhB( at room temperature. The Ag/ P.K. shell showed excellent catalytic activity in the reduction of these organic dyes. In addition, it was found that AgNPs/Apricot kernel shell can be recovered and reused several times without significant loss of catalytic activity. Manuscript profile -
Open Access Article
371 - Green synthesis of Ag nanoparticles on the calcite support using Salix aegyptiaca leaf extract and its catalytic activity investigation in removal of dyes
akbar Rostami leila rostamiIn this work, Ag nanoparticles (Ag NPs) were immobilized on the surface of mineral calcite (CaCO3) using leaf extract of pussy willow (Salix aegyptiaca) as reducing and stabilizing agent. Conversion of Ag+ to Ag NPs was carried out within a few minutes at room temperatu MoreIn this work, Ag nanoparticles (Ag NPs) were immobilized on the surface of mineral calcite (CaCO3) using leaf extract of pussy willow (Salix aegyptiaca) as reducing and stabilizing agent. Conversion of Ag+ to Ag NPs was carried out within a few minutes at room temperature. The calcite and its Ag nanocomposite (Ag NPs/Calcite) were characterized by fourier transform infrared (FTIR), ultraviolet and visible spectroscopy (UV-Vis), X-ray powder diffraction (XRD) and field emission scanning electron microscope (FESEM) couplied with energy dispersive X-ray spectroscopy (EDS or EDX), and transmission electron microscopy (TEM) techniques. The broad peaks between 450-500 nm in the UV-Vis spectrum of silver nanoparticles and Ag NPs/Calcite is assigned to a surface plasmon absorption. According to the TEM image, the average size of the Ag NPs on the surface of calcite surface was 11 nm. The Ag NPs/Calcite nanocomposite was used in the catalytic reduction reaction of methyl orange (MO), methylen blue (MB), and rhodamine B (RhB). The catalyst was reused three times without considerable loss in its activity. Manuscript profile -
Open Access Article
372 - Removal, pre-concentration and determination of palladium from different environmental water samples using modified magnetic nanoparticles prior to flame atomic absorption spectrometry
مریم حمیدی مجید رمضانیIn this study, a new sorbent based on dimethylglyoxim/sodium dodecyl sulfate - immobilized on TEOS-coated magnetic nanoparticles (Fe3O4@SiO2@SDS/DMG) was prepared as a simple, inexpensive, and fast method for pre-concentration and determination of trace amounts of palla MoreIn this study, a new sorbent based on dimethylglyoxim/sodium dodecyl sulfate - immobilized on TEOS-coated magnetic nanoparticles (Fe3O4@SiO2@SDS/DMG) was prepared as a simple, inexpensive, and fast method for pre-concentration and determination of trace amounts of palladium. In the proposed approach, the analytes retained on the sorbent are effectively eluted with thiourea– HCl solution and the absorbance of analyte was determined by flame atomic absorption spectrometry. The effects of different parameters on extraction efficiency such as effect of pH, extraction time, type and amount of eluent, and amount of absorbent phase were investigated and optimized by batch procedures. Under the optimum experimental conditions, the preconcentration factor, detection limit, linear range, and relative standard deviation (RSD) of palladium (II) ions were 250, 0.49 μgl-1, 125-3750μ gl-1, and 2.26 % (for 125μ gl-1, n=6), respectively. Finally, the method was successfully applied to the evaluation of Pd2+ in different environmental water samples. Manuscript profile -
Open Access Article
373 - Preparation of nylon 6,6 – Ag nanocomposite and characterization of its morphological and antibacterial properties
مریم فربودی ندا ایارهIn this research, silver nanoparticles were deposited on nylon 6,6 fibers with different methods including chemical, ultrasonic, and using colloidal silver solution. Also, the non-fiber nanocomposite of nylon 6,6-silver was prepared by dissolution of nylon 6,6 in formic MoreIn this research, silver nanoparticles were deposited on nylon 6,6 fibers with different methods including chemical, ultrasonic, and using colloidal silver solution. Also, the non-fiber nanocomposite of nylon 6,6-silver was prepared by dissolution of nylon 6,6 in formic acid in the presence of silver nanoparticles and extracted by acetone antisolvent. The morphological properties, antibacterial properties, elemental analysis, and wash durability of prepared samples were examined. SEM images and EDS analysis confirmed the presence of silver nanoparticles on nylon 6,6 in prepared samples before and after washing. The antibacterial capability of the samples were determined before and after washing against gram positive bacteria (S.aureus) and gram negative bacteria (E.coli) using resazurin color change. The obtained results confirmed, the sample prepared by ultrasonic method has the most effective antibacterial property before and after washing. According to the results of morphological observation and elemental analysis, it is due to the high amount and uniform deposition of silver on the fiber surface. Also, according to the results, non-fiber nylon6,6-silver nanocomposite has the weakest antibacterial property and other samples have intermediate properties. Manuscript profile -
Open Access Article
374 - Electrochemical sensor for fentanyl determination by modified electrode with carbon nanotube and iron (III) oxide nanoparticles
مصطفی نجفی اسماعیل سهولیFentanyl is a rapid-acting, analgesic drug, and a powerful opioid which is extensively used for anesthesia and chronic pain management. In this study, an electrochemical sensor based on a nanocomposite of multi wall carbon nanotubes )MWCNTs( and iron )III( oxide )Fe2O3( MoreFentanyl is a rapid-acting, analgesic drug, and a powerful opioid which is extensively used for anesthesia and chronic pain management. In this study, an electrochemical sensor based on a nanocomposite of multi wall carbon nanotubes )MWCNTs( and iron )III( oxide )Fe2O3( nanoparticles on the surface of glassy carbon electrode )GCE( was investigated for the analysis of fentanyl drug in aqueous media. The surface of modified electrode was studied with scanning electron microscope (SEM). The electrochemical behavior of modified electrode and determination of fentanyl were performed by cyclic voltammetry and differential pulse voltammetry )DPV(, respectively. The differential pulse voltammetry (DPV) measurement at the surface of modified electrode presented the linear relation between the anodic peak current and fentanyl concentration in tow range of 0.08 to 1 and 1 to 100 μM with limits of detection (LOD) of 0.045 μM. The effect of some potential interferences of electrode response was investigated. The proposed sensor was successfully employed for the determination of fentanyl in human blood serum and urine samples Manuscript profile -
Open Access Article
375 - Investigation of magnetic properties and photocatalytic performance of Fe3O4 nano particles after coating with ZnO and TiO2
سولماز قنبرنژاد علی نعمتی سعید باغشاهی محبوبه محمودیIn this research, magnetite NPs via sol/gel method was coated with ZnO and TiO2. Phases, microstructures, and magnetic properties of binary and ternary core/shell nanoparticles were characterized using X-ray diffraction )XRD), transmission electron microscopy )TEM) and MoreIn this research, magnetite NPs via sol/gel method was coated with ZnO and TiO2. Phases, microstructures, and magnetic properties of binary and ternary core/shell nanoparticles were characterized using X-ray diffraction )XRD), transmission electron microscopy )TEM) and vibrational magnetometer )VSM). Photocatalytic activities in methylene blue degradation under sunlight irradiation for 120 min were recorded using UV/Vis spectrophotometer, changes were studied using the photoluminescence spectrum (PL), and the specific surface areas were obtained by the nitrogen adsorption/desorption apparatus )BET). The results showed that 10 mg/ml core/shell nanoparticles during 120 min under sunlight radiation could degrade >90% of methylene blue molecules. However, the increase in the number of shells causes the change in the type of semiconductors from direct to indirect; following that heterogeneous interface reduces the photocatalytic efficiency Manuscript profile -
Open Access Article
376 - Synthesis and characterization of magnetic graphene nano-adsorbent stabilized on polymer nylon 6 and its application for removal of lead (II) ions contaminant form aqueous solution
سید یدالله میر نظامی مهران دولو محمودرضا سهرابی مرتضی خسروی فرشته مطیعیIn this research, the magnetic graphene nanoparticle )GM( was synthesized and stabilized on nylon-6. The purpose of its synthesis is to remove lead ions )II( contaminant from the aqueous solution. The prepared nanocomposite was characterized using X-ray diffraction anal MoreIn this research, the magnetic graphene nanoparticle )GM( was synthesized and stabilized on nylon-6. The purpose of its synthesis is to remove lead ions )II( contaminant from the aqueous solution. The prepared nanocomposite was characterized using X-ray diffraction analysis )XRD(, scanning electron microscope )SEM(, Fourier transform infrared spectrometry )FT-IR(, and surface area determination )BET(. In order to optimize the removal of Pb)II( ions from the aqueous solution the graphene was converted from two-dimensional to three-dimensional structure by using nylon-6 as substract to increase the surface area of the graphene and consequently increase the adsorbent efficiency. Another advantage of the absorbent is its magnetic effect that allows adsorption of the contaminant and its easy separation by an external magnet. The influence of experimental parameters such as initial solution pH, contact time, adsorbent dosage, concentration of lead ions (II) solution, and solution temperature on the removal efficiency were investigated. At optimal conditions the removal efficiency of lead ions (II) achieved by adsorbent was 95%. Manuscript profile -
Open Access Article
377 - افزایش جذب نانو ذرات آلومینای تقویت شده در پوششهای نانوکامپوزیتی نیکلین آلومینا با استفاده از حلال آلی متانول
صادق میرزامحمدی حمید خورسند محمود محمود علی اف خضرایی -
Open Access Article
378 - بررسی انتقال حرارت فروفلویید Fe3O4 برپایه آب تحت تاثیر میدان الکترومغناطیسی خارجی
صبا یزدانیفرو فلویید Fe3O4 ماده ای موثر بر کیفیت انتقال حرارت در حضور میدان الکترومغناطیسی خارجی است که این میدان خارجی حجم خوشه پارتیکل های لخته شده و ضریب هدایت حرارتی نانوذرات را کنترل می کند. در این مقاله کیفیت انتقال حرارت نانوسیال مغناطیسی بر افزایش کارایی مورد بررسی قرار م Moreفرو فلویید Fe3O4 ماده ای موثر بر کیفیت انتقال حرارت در حضور میدان الکترومغناطیسی خارجی است که این میدان خارجی حجم خوشه پارتیکل های لخته شده و ضریب هدایت حرارتی نانوذرات را کنترل می کند. در این مقاله کیفیت انتقال حرارت نانوسیال مغناطیسی بر افزایش کارایی مورد بررسی قرار می گیرد . مطالعات موردی انتقال حرارت فروفلوییدFe3O4 در این پژوهش مرور گردیده و نتایج مطالعات مشابه بررسی شده است. علاوه بر این ، صلاحیت فرو فلویید برای جایگزینی باسایر سیالات حامل در تجهیزات گرمایشی مورد بررسی قرار گرفته است. از آنجا که فرو فلویید ها توسط میدان مغناطیسی قابل کنترل هستند ،این میادین تأثیرات چشمگیری بر خواص انتقال حرارت می گذارند. به طور دقیق ، تأثیر محیط متخلخل در هندسه داکت و میدان های مغناطیسی مختلف بر میزان انتقال حرارت فرو فلویید همچنین عدد Nusselt مورد ارزیابی قرار گرفته است. مطالعات قبلی نشان می دهد که فرو فلویید ها می توانند انتقال حرارت را بهبود بخشند و بازده حرارتی بستگی زیادی به قدرت میدان مغناطیسی دارد. جریان فرو سیال Fe3O4 آرام بوده و عدد رینولدز ثابت فرض شده است و اطلاعات دما از دقت بالایی برخوردار است. بازده انتقال حرارت سایر سیالات مغناطیسی مانند Al2O3 و CuO به طور مختصر بررسی شده تاضمن مقایسه مختصر ، مناسب بودن نانوسیال Fe3O4 را اثبات گردد Manuscript profile -
Open Access Article
379 - کاه خاکستر برنج - منبع جدیدی از نانوذرات سیلیس
حمید خورسند نسیم کیایی امیرحسین معصوم پرست -
Open Access Article
380 - Biosynthesis of ZnO nanoparticles using green tea extract and determination of its antibiofilm effect on Pseudomonas aeruginosa strains isolated from wound infection
Behrooz Shojaee Sadi Shima Chehreii Mahla EsmaeiliBackground & Objectives: Owing to the antimicrobial activity of ZnO nanoparticles without causing resistance, such substances could be considered as an appropriate alternative to prevent bacterial biofilm formation. The aim of this study was to the biosynthesis of Z MoreBackground & Objectives: Owing to the antimicrobial activity of ZnO nanoparticles without causing resistance, such substances could be considered as an appropriate alternative to prevent bacterial biofilm formation. The aim of this study was to the biosynthesis of ZnO nanoparticles using green tea extract and determination of its effect on biofilm formation in Pseudomonas aeruginosa isolates separated from wound infection. Materials & Methods: In this cross-sectional study, biosynthetic nanoparticles were evaluated by X-ray diffraction, energy dispersive X-ray analysis, scanning electron microscopy and transmission electron microscopy. Determination of antimicrobial activity and minimum inhibitory concentration of nanoparticles were done by micro broth dilution method. The antibiofilm activity was investigated using biofilm formation by O'Toole 2011 method. Results: The biosynthesis of nanoparticles was confirmed by analysis. The size of the nanoparticles was determined in the range of 10 to 90 with an average of less than 40 nm. The nanoparticles had anti-microbial activities in concentrations of 250, 500 and 1000 ug/mL and minimum inhibitory concentration of 500 ug/mL was reported. The antimicrobial and antibiofilm effects of the nanoparticles rose with increasing the concentrations. Conclusion: The biosynthesis of nanoparticles with the extract has a variety of benefits such as simplicity, good stability, without energy consumption, less time-consuming, non-toxic wastes, economical efficiency, and large scale synthesis capability. According to the antimicrobial and antibiofilm properties, the use of these nanoparticles as coatings in medical equipment and food industries is recommended. Manuscript profile -
Open Access Article
381 - Antibacterial and antibiofilm activity of bismuth oxide nanoparticles produced by Bacillus subtilis against clinical Pseudomonas aeruginosa isolated from wound infections
Leila Firouzi Dalvand Farzaneh Hosseini Shahram Moradi Dehaghi Elham Siasi TorbatiBackground & Objectives: The biological method of nanoparticles synthesis by microorganisms has a special place due to its high environmental compatibility and reduced energy consumption and costs. The aim of this study was to determine the effect of bismuth oxide n MoreBackground & Objectives: The biological method of nanoparticles synthesis by microorganisms has a special place due to its high environmental compatibility and reduced energy consumption and costs. The aim of this study was to determine the effect of bismuth oxide nanoparticles produced by green methods on bacteria causing hospital infections. Materials & Methods: In this study, 160 samples were collected from burn wound infections in patients hospitalized in Motahari Burn Rescue Hospital. Resistant strains were identified phenotypically and genotypically. Synthesis of bismuth oxide nanoparticles by Bacillus subtilis wild type strain. The synthesis of bismuth oxide nanoparticles was confirmed by infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. Finally, the antibacterial activity of nanoparticles against isolated strains was investigated with the standard disk diffusion test. Results: Biosynthesis of nanoparticles showed an average size of 44 nm using Bacillus subtilis. All 44% (71 strains) of Pseudomonas aeruginosa formed a biofilm. Bismuth oxide nanoparticles at a concentration of 2000 ppm were inhibited 5% of Pseudomonas aeruginosa. Conclusion: By increasing the concentration of bismuth oxide nanoparticles, its inhibitory effect increased. The results showed that there is a significant difference between the groups exposed nanoparticle and ciprofloxacin. Manuscript profile -
Open Access Article
382 - Analysis of zinc resistance gene in zinc and zinc oxide nanoparticles resistant Pseudomonas stutzeri SEE-1 isolated from soil
Shahla Soltani Nezhad Mohammad Rabbani Khorasgani Giti EmtiaziBackground & Objectives: Environmental pollution to toxic heavy metals is one of global environmental problems. Microorganisms perform several mechanisms to reduce the intracellular concentration of toxic pollutants. The objective of this study was to identify zinc MoreBackground & Objectives: Environmental pollution to toxic heavy metals is one of global environmental problems. Microorganisms perform several mechanisms to reduce the intracellular concentration of toxic pollutants. The objective of this study was to identify zinc resistance determinant (czcC gene) in zinc resistant Pseudomonas stutzeri SEE-1 isolated from soil. Materials & Methods: The strain was performed on a P. stutzeri strain isolated previously from soil by culture on MTBE (Methyl Tertiary Butyl Ether). The maximum tolerable concentrations of zinc ions and zinc oxide nanoparticles were determined. PCR amplification was used to investigate the czcC gene. The nucleotide sequence was translated into protein sequence and its sequence was compared with other similar sequences in other zinc resistant bacteria. Results: The highest tolerable concentrations of zinc ion and zinc nanooxide was measured at 4mM and 600 µg ml-1, respectively. The primers used for the amplification of the Zn-resistance gene (czcC) yielded a approximately 250 bp band. The comparison of czcC with other sequences in the gene bank database demonstrated 100% similarities with czcC gene in P. stutzeri 1501. Conclusion: The results of this study showed that soils contaminated with heavy metals are potential sources for the isolation of resistant strains to heavy metals and metal oxide nanoparticles. Understanding the genetic basis of bacterial resistance to heavy metals can improve application of these natural mechanisms to provide a safer environment for all living things. Manuscript profile -
Open Access Article
383 - Investigation of antifungal effect of nanoparticle-encapsulated curcumin on CDR1 gene expression in fluconazole-resistant isolates of Candida albicans
Hadiseh Golpour Najmeh Ranji Seyedeh Hajar SharamiBackground & Objectives: Curcumin as a natural phenolic compound derived from Curcuma longa plant has shown an antifungal property. Candida albicans is the most common opportunistic fungal pathogen. Continuous deployment of antifungals against this pathogen has led MoreBackground & Objectives: Curcumin as a natural phenolic compound derived from Curcuma longa plant has shown an antifungal property. Candida albicans is the most common opportunistic fungal pathogen. Continuous deployment of antifungals against this pathogen has led to the emergence and increasing of the multi-drug resistance. In this study, the effect of nanoparticle-encapsulated curcumin on CDR1 gene expression was evaluated in fluconazole-resistant isolates of C. albicans. Materials & Methods: In this study, 6 fluconazole-resistant isolates of C. albicans were treated just by fluconazole (1/2MIC) as the control sample and in the combination with nanoparticle-encapsulated curcumin as the test sample. After 24h, two cell groups were cultured in Sabouraud Dextrose Agar to estimate cell death percentage. Following RNA extraction and cDNA synthesis, CDR1 gene expression was investigated quantitatively by real-time PCR method in both curcumin-treated and untreated cells. Results: Our findings showed that the combination of fluconazole (1/2MIC) and nanoparticle-encapsulated curcumin treatment reduces the fungal growth by 50% after 24 h. Moreover, quantitative real-time PCR analysis revealed that nanoparticle-encapsulated curcumin decreases the expression level of CDR1. Conclusion: Our findings suggested that curcumin can inhibit fungal growth through different mechanisms such as decreasing the number of ABC efflux pumps at the cell surface and synergically increases the antifungal effect of fluconazole in resistant isolates of C. albicans. Manuscript profile -
Open Access Article
384 - Biosynthesis of copper nanoparticles by Stenotrophomonas maltophilia
Zahra Amirpoor Monir Doudi Gholam Reza AmiriBackground & Objectives: Heavy metals are environmentally sustainable and durable pollutants that have become a world problem. As microorganisms show high resistance to heavy metals and can purify the environment and produce nanoparticles, the present study was desi MoreBackground & Objectives: Heavy metals are environmentally sustainable and durable pollutants that have become a world problem. As microorganisms show high resistance to heavy metals and can purify the environment and produce nanoparticles, the present study was designed to produce copper nanoparticles from copper-resistant bacteria isolated from wastewater of two copper workshops in Isfahan. Materials & Methods: In this cross-sectional study, wastewater samples were collected from two copper workshops in Isfahan. The physicochemical factors of the wastewater, the minimum inhibitory concentration of bacteria (MIC) to copper and their resistance to several antibiotics were investigated. Morphological, biochemical and molecular identification tests were carried out on samples. Then the biomass of copper-resistant bacteria was added to the copper sulfate pentahydrate stock (CuSO4.5H2O) and the results were evaluated by Ultraviolet-Visible spectrophotometer (UV-VIS), X-ray diffraction (XRD) and Transient Electron Microscopy (TEM). Results: Among the studied bacteria, the Bacillus toyonensis strain NE2 with the MIC of 3.5 mM and Arthrobacteragilis NE1 with MIC of 4 mM from copper workshop 2 and Stenotrophomonas maltophilia strain 5633 with the MIC of 6 mM from copper workshop 1 were isolated. Among these isolates, only S. maltophilia strain 5633 was able to synthesize copper nanoparticles. Peaks created in the range of 250-430 nm confirmed the presence of Copper (Cu) and Copper Oxide (CuO) particles. Conclusion: The findings of this study showed that the isolated bacteria could be a good candidate to remove copper from wastewater and to biosynthesize copper nanoparticle. Manuscript profile -
Open Access Article
385 - The effect of silybin-encapsulated micelle nanoparticles on mexY expression in ciprofloxacin-resistant isolates of Pseudomonas aeruginosa
Zahra Ahmadi Roudbaraki Najmeh Ranji Aref Mohammadipour Zahra GhasemnegadBackground & Objectives: Pseudomonas aeruginosa is a major nosocomial infection in immunocompromised patients. Silybin as an herbal drug has anti-inflammatory and anti-cancer effects and recently further studies have been focused on its antibacterial functions. The MoreBackground & Objectives: Pseudomonas aeruginosa is a major nosocomial infection in immunocompromised patients. Silybin as an herbal drug has anti-inflammatory and anti-cancer effects and recently further studies have been focused on its antibacterial functions. The aim of this study was to investigate the antibacterial effect of silybin on mexY gene expression in ciprofloxacin (CP)-resistant isolates of P. aeruginosa.Materials & Methods: In this study, six ciprofloxacin- resistant isolates of P. aeruginosa were both treated by ciprofloxacin (1/2 MIC) only as a control sample and in combination with silybin-encapsulated micelles (nanoparticles) as the test sample. MBC test was performed 24 h after culturein Mueller-Hinton agar. After RNA extraction and cDNA synthesis, mexY expression was quantitatively investigated in silybin- treated and untreated cells.Results: Our findings showed that a combined silybin-encapsulated micelles and ciprofloxacin (1/2 MIC) treatment reduces the bacterial growth up to 50% after 24h. Also Q-RT-PCR analysis revealed that silybin-encapsulated micelles decrease mexY expression.Conclusion: Our results suggest that silybin could inhibit bacterial growth by decreasing mexXY-oprM efflux pump count on the cell surface. Manuscript profile -
Open Access Article
386 - Antibacterial effect of chitosan nanoparticles against Salmonella enteritidis
Esmaeil Mahmoudi Abbas Doosti Mohammad-Saeid JamiBackground & Objectives: Salmonella enteritidis causes a number of infections in humans and other animals. Though different antibiotics are used to eliminate bacterial infections, due to the development of antibiotic resistance after a while, the use of nanoparticle MoreBackground & Objectives: Salmonella enteritidis causes a number of infections in humans and other animals. Though different antibiotics are used to eliminate bacterial infections, due to the development of antibiotic resistance after a while, the use of nanoparticles has been considered as suitable alternatives. Chitosan nanoparticles are appropriate options for the intended strategy due to some properties including low molecular weight and biodegradability. Therefore, the aim of this study was to evaluate the antibacterial effect of chitosan nanoparticles against S. enteritidis. Materials & Methods: Standard bacterial strain was prepared and subsequently confirmed by PCR technique. Ionic gelation method was used to fabricate chitosan nanoparticles and Hole-Plate and tube dilution methods were used to check the chitosan nanoparticles anti-microbial properties with antibiotics. At last Zeta's analysis techniques, dynamic optical scanning, and electron microscopy were used to evaluate nanoparticles. Results: A 214 base pair band confirmed the presence of bacteria. Chitosan nanoparticles with low molecular weight were produced by analyzing the results of optical dynamics scattering (111.7 nm), zeta analysis (20.8 mV) and microscopy (Conclusion: There is a significant relationship between the chitosan nanoparticles resistance and antibiotics against bacteria. In other words, the nanoparticles antibacterial properties were higher than antibiotics. It is deduced that chitosan nanoparticles can be used to control diseases and to destroy resistant bacterial species. Manuscript profile -
Open Access Article
387 - Applications of iron oxide nanoparticles in microbiology and the effects on microorganisms
Alireza Ebrahiminezhad Aydin Berenjian Seyyed Amin Kohpayeh Yones GhasemiA broad application of nanostructures in various fields of science has led to their commercialization in different industries. For instance, application of the antimicrobial activity of nanosilver is one of the consequences of such these strategies. Furthermore, iron ox MoreA broad application of nanostructures in various fields of science has led to their commercialization in different industries. For instance, application of the antimicrobial activity of nanosilver is one of the consequences of such these strategies. Furthermore, iron oxide nanoparticles is currently employed in microbial cell fixation. In addition, nanoparticles can be used for effective targeted drug delivery to the site of infection. In this term, study on the effect of iron oxide nanoparticles on the physiology of microorganisms is highly demanded. At low concentrations, since iron oxide nanoparticles can act as iron source of microorganisms, they may be eliminated from microbial environment. However, higher concentrations of these particles can result in cell stress and reduction in microbial cell growth. These nanoparticles attach to the microbial cell wall via electrostatic and hydrophobic forces, reducing microbial pathogenicity. The attachment of iron oxide nanoparticles to bacterial cell wall interferes in functionality of cell membrane and thereby increase membranes permeability. These phenomenon increases molecular transportation through the cell membrane and increases productivity in industrial process. Manuscript profile -
Open Access Article
388 - Antimicrobial effect of silver nanoparticles synthesized using weed seed exudates against the standard strains of Bacillus cereus and Acinetobacter baumannii
Mehrdad Khatami Shahram Pourseyedi Manoochehr Khatami Keighobad KeikavousiBackground & Objectives: Due to the antimicrobial ability of silver and increases in these ability at nano-levels, it is possible to use silver nanoparticles for treatment of infections. This study was aimed to evaluate antimicrobial effect of silver nanoparticles s MoreBackground & Objectives: Due to the antimicrobial ability of silver and increases in these ability at nano-levels, it is possible to use silver nanoparticles for treatment of infections. This study was aimed to evaluate antimicrobial effect of silver nanoparticles synthesized using weed seed exudates against of Bacillus cereus and Acinetobacter baumannii. Materials & Methods: In this sectional study, silver nanoparticles were synthesized using Prosopis farcta seed exudates and analyzed with UV-vis spectrophotometer, X-ray diffraction and transmission electron microscopy. The broth macro dilution method was used to investigate the antibacterial effects of silver nanoparticles. Results: Synthesis of silver nanoparticles was confirmed using UV-vis spectroscopy and X-ray diffraction analysis. Transmission electron microscopy showed the production of nanoparticles with 5-35 nm diameters. The minimum inhibitory concentrations against A. baumannii and B. cereus were 1.56 and 3.12 µg/mL and minimum bactericidal concentrations of 3.12 and 6.25 µg/mL, respectively. Conclusion: Biological synthesis of nanoparticles using P. farcta seed exudates is a very cost effective method and there is no need to energy sources. The ability to synthesize silver nanoparticles using P. farcta can make this agricultural-useless plant as a biological source for the synthesis of nanoparticles using. Manuscript profile -
Open Access Article
389 - Biological production and assessment of the antibacterial activity of gold nanoaprticles
Parastoo Pourali Majid Baseri Salehi Sima Afsharnejad Javad BehravanBackground and Objectives: In addition to safety, nanoparticles produced via biological methods show antimicrobial activity against human pathogens. This study was aimed to isolation and identification of intracellular and extracellular gold nanoparticle producing strai MoreBackground and Objectives: In addition to safety, nanoparticles produced via biological methods show antimicrobial activity against human pathogens. This study was aimed to isolation and identification of intracellular and extracellular gold nanoparticle producing strains from soil and to investigate the antimicrobial effects of the produced nanoparticles on 10 common bacterial pathogens. Materials and Methods: In this study, after isolation of bacteria from the soil and production of the gold nanaoparticles by their supernatants and their pure cells, the bio-production was confirmed through visible spectrophotometry, transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD). The nanoparticle producing stains were identified based on gene amplification by PCR and gene sequencing. Finally, the antibacterial properties of the produced gold nanoaprticles against 10 pathogenic bacteria was assessed by well diffusion method. Results: Results showed that 38 strains had ability to produce extracellular gold nanoparticles. Among them 16 strains had ability to produce intracellular gold nanoparticles as well. TEM images of the gold nanoparticles showed sizes less than 100 nm and the XRD patterns confirmed the crystalline structure of the gold nanoparticles. Three bacterial strains, Bacillus mojavensis, Bacillus subtilis and Bacillus vallismortis, showed higher productivity. Antibacterial tests showed that the extracellular gold nanoaprticles had better activity against pathogenic bacterial strains than the intracellular produced ones. Conclusion: Production of gold nanoparticles was performed by biological method. This nanoparticles showed a same antibacterial activity against both tested gram positive and negative bacteria. Manuscript profile -
Open Access Article
390 - Antibacterial effect of silver nanoparticles synthesized from the red algae Gracilaria gracilis
somayeh Ataei- e jaliseh maryam zamani kochesfehni mohammad hossein zamani kochesfehaniSilver nanoparticles (Ag-np) have high penetration and antimicrobial effect due to their high surface-to-volume ratio. The aim of this study was to biosynthesize silver nanoparticles with red algae extract, Gracilaria gracilis, and to investigate their MoreSilver nanoparticles (Ag-np) have high penetration and antimicrobial effect due to their high surface-to-volume ratio. The aim of this study was to biosynthesize silver nanoparticles with red algae extract, Gracilaria gracilis, and to investigate their antibacterial activity against a number of standard and drug-resistant pathogenic bacteria. First, Ag-np were synthesized. To confirm the structure and size of Ag-np, was used X-Ray diffraction spectroscopy, FE-SEM electron microscopy, and X-ray energy dispersive spectroscopy (EDS). The antimicrobial effects of algae extract on bacteria were determined by sequential dilution method. The size of nanoparticles under electron microscopy was between 12 and 46 nm. The nanoparticles were able to inhibit most of standard and antibiotic resistant bacteria, Ag-np at a concentration of 29 μg /ml, on the standard bacteria: S. typhimorium, E. coli, K. pneumonia and the clinically resistant bacteria, E. coli and K. pneumonia, they had the most inhibitory effect. In contrast, standard and clinically resistant isolates of S. aureus and standard strain S. pneumonia were resistant to Ag-np. The results of this research showed that the G. gracilis red algae as a bio-source that can be useful for green synthesis of silver nanoparticles at very low cost applications, these nanoparticles can be used as candidates for drug composition. Manuscript profile -
Open Access Article
391 - Skin drug release and antifungal activity of econazole-containing silica nanoparticles
maryam montazeri Saman Ahmad Nasrollahi Alireza Feizbakhsh, , Mehdi Razzaghi-AbyanehBackground & Objectives: Silica Nanoparticles (MCM41) are silica mesopores (MSNs), which have large pores and relatively low density. The purpose of this study was to load Econazole onto silica nanoparticles (MCM41-NH2 and MCM41) And release of econazole in human sk MoreBackground & Objectives: Silica Nanoparticles (MCM41) are silica mesopores (MSNs), which have large pores and relatively low density. The purpose of this study was to load Econazole onto silica nanoparticles (MCM41-NH2 and MCM41) And release of econazole in human skin (Ex-Vivo) then the antifungal effect of loaded econazole on silica nanoparticles was investigated. Materials & Methods: In this study, MCM41 was prepared, then MCM41-NH2 nanoparticles were provided by using amine cetyltrimethylammonium bromide and finally, the drug econazole was loaded on it. The morphology of the nanoparticles was determined by SEM and drug loading by FT-IR. Francescell and UV-Vis were used to measure the release. The release cream from the skin containing 1/1 drug and nanoparticles was prepared. Finally, the anti-fungal effect of ECO/MSNs was investigated in three ways. Francescell device was also used to check skin release. Results: Silica nanoparticles were prepared about 300 nanometers Release of the drug into the skin showed that during the first 8 hours 80% release and then up to 24 hours of continuous drug release. Antifungal effect by disk diffusion method showed that ECO/MCM41 had a larger inhibitory effect and also minimal inhibition of fungal growth (MIC) 75 mg/ml. Antifungal tests showed that no fungus grew after 72 hours.the antifungal effect as well as ECO / MCM41 (MIC) was greater in methanol. Conclusion: The antifungal effect of the newest agar method was not suitable for this drug. Therefore, as a suitable drug in the cream, a drug loaded with methanol is recommended. Manuscript profile -
Open Access Article
392 - Evaluation of the effect of Myristic acid and iron nanoparticles on the expression of Proteus Mirabilis pathogenic genes
Zeinab Ashenagar kumarss aminiBackground: Proteus is one of the most important causes of UTI and nosocomial infections. Nowadays, the focus is on the antibacterial effects of natural products. The aim of this study was to investigate the effect of myristic acid and iron nanoparticles on the expressi MoreBackground: Proteus is one of the most important causes of UTI and nosocomial infections. Nowadays, the focus is on the antibacterial effects of natural products. The aim of this study was to investigate the effect of myristic acid and iron nanoparticles on the expression of Proteus Mirabilis pathogenic genes isolated from urine samples.Materials and Methods: In this cross-sectional study, urine samples were collected from outpatients and patients admitted to hospitals and clinics during six months. After identification of Proteus mirabilis using standard methods, these isolates were tested for antibiotic resistance. After identification of the target gene bacteria, iron nanoparticles and myristic acid were treated and the expression of flaA and ureA genes in these bacteria were evaluated.Results: Finally, 6219 positive urine samples were collected from which 3937 (63.3%) were female and 2282 (36.7%) were male (mean age 16 69 69 years). Sixty Proteus mirabilis strains were isolated. Out of 60 clinical samples, flaA gene was present in 100% and UreA gene in 91.65% of isolated bacteria. The results showed that the expression level of flaA gene in isolates treated with mixture of myristic acid and iron nanoparticles decreased by one quarter of normal in isolates (p = 0.002).Conclusions: The data showed that iron oxide and meristic acid nanoparticles have strong antibacterial activity against Proteus mirabilis strains with flaA gene. In addition, these compounds decreased flagellin gene expression, which may indicate regulatory systems responsive to external signals. Therefore, these two substances can be considered as grounds for further studies on infection control. Manuscript profile -
Open Access Article
393 - Chromium bioremediation by Pseudomonas plecoglossicid and mesoporous silica nanoparticles from oil contaminated soils
mahdi Shahriarinour Shahghayegh Talebsarbazi Faten Divsar Background & Objectives: The presence of cytotoxic and carcinogenic heavy metals such as Chromium in industrial wastewater is an important pollution for agricultural soils and natural water sources. The aim of study was to evaluate chromium removal with More Background & Objectives: The presence of cytotoxic and carcinogenic heavy metals such as Chromium in industrial wastewater is an important pollution for agricultural soils and natural water sources. The aim of study was to evaluate chromium removal with a bacterium isolate form contaminated soil compared to mesoporous silica nanoparticles. Materials and methods: In this study, for isolate chromium decomposing bacteria, soil were sampled from different of contaminated beach of Kiashahr. Preliminary identification of the isolated strains was done based on biochemical tests and then molecular identification of bacteria by 16SrRNA sequencing. Cr removal was evaluated with resistant strain and nanoparticles by Atomic absorption spectrometry (AAS), individually. Results: Chromium-degrading bacteria were identified based on 16SrRNA analysis and 99% homology of Pseudomonas pelicoglucida. Removal of chromium by mesoporous silica nanoparticles at a concentration of 300 μg / ml was higher than the isolated strain of Pseudomonas pelicoglucida and showed a removal rate of up to 75%. However, by increasing the concentration of chromium by more than 600 micrograms per milliliter, the ability of bacteria to remove chromium from mesoporous silica nanoparticles showed better results by 80% to 72% chromium removal. Conclusion: Results indicated Pseudomonas pelicoglucida and nanoparticles can be used to remove chromium from contaminated soils and waters. It is also recommended to use chromium-removing bacteria and nano-adsorbents to remove chromium at the same time to increase the efficiency of chromium removal. Manuscript profile -
Open Access Article
394 - The evaluation of the effect of gold nanoparticles on the expression of (MexA/B) efflux pump genes from the RND family in multidrug resistant Pseudomonas aeruginosa strains
Nehleh Falahati Houshang Jamali Mohammad Kargar Farshid KafilzadehBackground and purpose: Pseudomonas aeruginosa has several protein pumps with which it puts antibiotics out. This has led to the formation of multidrug resistance. The aim of this study was to investigate the effect of gold nanoparticles on the expression of mexA/B gene MoreBackground and purpose: Pseudomonas aeruginosa has several protein pumps with which it puts antibiotics out. This has led to the formation of multidrug resistance. The aim of this study was to investigate the effect of gold nanoparticles on the expression of mexA/B genes in multidrug resistant Pseudomonas aeruginosa strains. Materials and Methods: In this cross-sectional descriptive study, 74 suspected samples of Pseudomonas genus were collected and phenotypic and genotypic tests were used to screen Pseudomonas aeruginosa.Then, anibiogram test using 11 antibiotics from different classes was performed by the use of CLSI 2020 standard tables and the disk diffusion method.The frequency of mexA/B genes was evaluated by polymerase chain reaction method and after determining the minimum inhibitory concentration of gold nanoparticles, the effect of gold nanoparticles on the expression of mexA/B genes was evaluated using SYBER Green-Real Time PCR technique. Results: In this study (67.57%) 50 isolates of Pseudomonas aeruginosa were identified. The highest and lowest levels of antibiotic resistance were related to azteronam (98%) and cefpime (26%). The prevalence of mexA/B genes was respectively MexA (74%), mexB (70%) and mexA/B (58%) and also 12% lacked both genes. Gold nanoparticles showed growth inhibitory effect at MIC ≥ 50ppm and at 25 ppm concentration with ciprofloxacin, showed inhibitory effect on the expression of mexA/B genes. Conclusion: The results of this study showed that gold nanoparticles can inhibit the expression of mexA and mexB genes in multidrug-resistant Pseudomonas aeruginosa. Due to the fact that gold nanoparticle does not have toxic effects on eukaryotic cells, it can be important in the treatment process of this group of bacteria. Manuscript profile -
Open Access Article
395 - Effect of silver nanoparticles on the expression of pvl and tsst genes of Staphylococcus aureus in Real-time PCR
yasaman dastgir zahra keshtmand katayun borhanieBackground and objective: Nowadays, research on nanoparticles as antimicrobial compounds is increasing.Staphylococcus aureus is an important nosocomial pathogen that produces a wide range of exotoxins that are involved in causing disease in the host.The aim of this stud MoreBackground and objective: Nowadays, research on nanoparticles as antimicrobial compounds is increasing.Staphylococcus aureus is an important nosocomial pathogen that produces a wide range of exotoxins that are involved in causing disease in the host.The aim of this study was to investigate the effect of silver nanoparticles (AgNPs) on the expression of pathogenic genes of pvl and tsst genes in Staphylococcus aureus. Methods and methods: In this experimental study, the minimum growth inhibition concentration of silver nanoparticles was determined by Broth microdilution method. First, the lowest concentration of silver nanoparticles that inhibits bacterial growth was determined and then at a concentration lower than that, the expression of pvl and tsst genes in Staphylococcus aureus was studied by Real-Time PCR method. Data were analyzed using one-way ANOVA, Tukey test and P-value < 0.05. Results: Silver nanoparticles with concentration 62.5μg/ml had growth effect on Staphylococcus aureus bacteria. Also at concentration 31.25 μg/ml, the expression of pvl and tsst genes in Staphylococcus aureus was significantly reduced compared to the reference gene (rpo) (P <0.001). Conclusion: According to the results of the present study, silver nanoparticles can inhibit the growth of Staphylococcus aureus bacteria and reduce the expression of virulence genes pvl and tsst. Manuscript profile -
Open Access Article
396 - Synergistic effect of silver oxide nanoparticles and probiotic Lactobacillus plantarum on gene expression of MexX component of pump efflux system in drug-resistant Pseudomonas aeruginosa strains
Oumaima AL-Hilli farahnaz molavi maryam tehranipoorBackground & Objectives: An important part of drug resistance In Pseudomonas aeruginosa is related to efflux pump systems. In this study, the antimicrobial effect of silver oxide nanoparticle and Lactobacillus plantarum probiotic on MexX gene expre MoreBackground & Objectives: An important part of drug resistance In Pseudomonas aeruginosa is related to efflux pump systems. In this study, the antimicrobial effect of silver oxide nanoparticle and Lactobacillus plantarum probiotic on MexX gene expression has been studied. Materials & Methods: In this descriptive cross-sectional study, 49 samples were collected from Mashhad and identified using standard methods. Strains with multidrug resistance were selected to determine MIC and check the frequency of MexX gene by PCR method. Broth dilution method was performed for probiotics, silver oxide nanoparticles and combination of both to obtain MIC and MBC. Microdilution method and Real time-PCR technique were used to determine the effective dilution of silver oxide nanoparticles and probiotics and MexX gene expression, respectively. The data related to the changes in MexX gene expression were analyzed by the 2-ΔΔCT method using the independent T test in two groups. Results: All strains had MexX gene and all of them were resistant to more than two antibiotics. The minimum concentration of growth inhibition in the dilution method in agar was for silver oxide nanoparticles up to a dilution of 500 µg/ml and for probiotics up to a dilution of 16 µg/ml. Compared to probiotics, silver nanoparticles had a greater effect in inhibiting the growth of bacteria, and the amount of this effect is greater than the combined effect of probiotics and silver nanoparticles (P>0.05). Conclusion: Silver oxide nanoparticle and probiotic have antibacterial effect to reduce MexXY-OprM efflux pump function in Pseudomonas aeruginosa bacteria. Manuscript profile -
Open Access Article
397 - Evaluation of antimicrobial and anticancer effects of silver nanoparticles synthesized by extracts of chamomile (Matricaria parthenium)
shabnam shamaei Faezeh Bashiri GoodarziBackground &Objectives: Silver nanoparticles have been widely used due to their anti-bacterial activities and anticancer properties. The aim of this study was to investigate the antimicrobial effects and cell toxicity of silver nanoparticles synthesized using extrac MoreBackground &Objectives: Silver nanoparticles have been widely used due to their anti-bacterial activities and anticancer properties. The aim of this study was to investigate the antimicrobial effects and cell toxicity of silver nanoparticles synthesized using extracts of chamomile on three neoplastic cell lines (A549, MCF-7 and HeLa). Materials & Methods: Silver nanoparticles were biologically synthesized using extracts of chamomile. After physical and chemical evaluation of the synthesized nanoparticles, their antimicrobial properties were estimated on Escherichia coli and Staphylococcus aureus. Finally, the inhibitory effect of synthesized nanoparticles evaluated by using MTT technique on 3 neoplastic cell lines. Results: The average size of nanoparticles synthesized by the extract of chamomile were 19 nm. The synthesized nanoparticles could have a significant inhibitory and lethal effect on the two named bacteria. silver nanoparticles were able to show a 50% inhibitory effect on different cell lines at a concentration of 50 μg/ml. Conclusion: Based on the results, it can be stated that medicinal plants can be used in the successful biosynthesis of silver nanoparticles. After human studies and tests, chamomile-based silver nanoparticles can be used as effective therapeutic agent in the treatment of some cancers due to their coating of effective secondary metabolites and the release of silver ions (Ag+). Manuscript profile -
Open Access Article
398 - The effect of titanium dioxide nanoparticles on the expression of genes effective in biofilm production in resistant Klebsiella pneumoniae strains
Marzieh Shafiei kumarss amini Parvaneh JafariBackground and Objectives: The ability of Klebsiella pneumoniae as an opportunistic bacterium in hospital infections, by producing biofilm on food utensils and hospital surfaces, has adverse effects on the treatment and survival of hospitalized patients. The present stu MoreBackground and Objectives: The ability of Klebsiella pneumoniae as an opportunistic bacterium in hospital infections, by producing biofilm on food utensils and hospital surfaces, has adverse effects on the treatment and survival of hospitalized patients. The present study was conducted with the aim of investigating the effect of TiO2 nanoparticles on Klebsiella pneumoniae biofilm formation.Materials and methods: TiO2 nanoparticles were produced using sol-gel method. 62 strains of Klebsiella pneumoniae were isolated from three hospitals in Tehran. Antimicrobial activity of TiO2 nanoparticles against biofilm-producing and antibiotic-resistant strains was determined by disk diffusion method. Definitive identification of the isolates was done through common biochemical tests and 16S rRNA sequencing, and the expression of treC, mrkD, sugE, luxS and 16SrRNA genes was investigated by real time PCR.Findings: The data showed that the ability to form biofilm among isolates obtained from sputum was higher than other isolates. TiO2 nanoparticles with a concentration of 256 μg/ml inhibited biofilm production in fourteen isolated strains. Comparison of LuxS gene expression in Klebsiella pneumoniae untreated and treated with TiO2 showed that the level of gene expression decreased by 3.85 times (p = 0.002).Conclusion: This study showed that the synthesized TiO2 nanoparticles are effective against the formation of biofilm in Klebsiella pneumoniae strains resistant to several drugs and can be reliable and useful as inorganic antimicrobial agents. Manuscript profile -
Open Access Article
399 - Synthesis of silver nanoparticles from Ephedra intermedia extract and evaluation of antibacterial and antioxidant properties
Mina Tetrontan Seyed Mohammad Mahdi Hamdi Maryam Ebrahimi TajabadiBackground & Objective: Ephedra intermedia species from the Ephedraceae family is a shrubby plant and is considered among the primitive plants. The aim of this study is to synthesize silver nanoparticles from the extract of this species in order to investigate its antim MoreBackground & Objective: Ephedra intermedia species from the Ephedraceae family is a shrubby plant and is considered among the primitive plants. The aim of this study is to synthesize silver nanoparticles from the extract of this species in order to investigate its antimicrobial and antioxidant effects. Materials and methods: First, methanolic extract was prepared and silver nanoparticles were synthesized using silver salt. A spectrophotometric device was used to verify silver nanoparticles and a scanning electron microscope was used to check its dimensions and shape. FTIR analysis was used to investigate the possible organic compounds involved in the synthesis of nanoparticles, and to determine the concentration of nanoparticles, the analysis was performed by AAS and the antioxidant properties were evaluated by the DPPH method. In order to evaluate the antimicrobial activity, MBC and MIC and disking method were used. Results: The nanoparticles produced were spherical and in the range of 30-89 nm, and the most effective group of agents that played a role in its production were the hydroxyl group (O-H) and alkene compounds (C=C), and the concentration of biosynthetic nanoparticles was 2.25 mg/liter indicates a high concentration of synthesized nanowires. The results of MIC and MBC tests were the same and its concentration was 2000 μg/ml. Conclusion: The results of this research showed that the biosynthetic nanoparticle obtained from Ephedra Intermedia is more effective in inhibiting the growth of bacteria than the commercial nanoparticle, so it can be used as an alternative in pharmaceutical, medical and disinfectant applications. Manuscript profile -
Open Access Article
400 - Detection of Escherichia coli in pharmaceutical and water samples using a biosensor based on carbon nanotubes containing gold nanoparticles
Fatemeh Behoftadeh Mohammad Faezi Ghasemi Ali Mojtahedi khosro Issazadeh Mostafa GolshekanBackground & Objectives: Escherichia coli is an important indicator in the quality control of pharmaceutical and real samples. This study compares the detection of this bacterium by regular method and a biosensor based on Multi-Walled Carbon Nanotubes (MWCNTs) on glassy MoreBackground & Objectives: Escherichia coli is an important indicator in the quality control of pharmaceutical and real samples. This study compares the detection of this bacterium by regular method and a biosensor based on Multi-Walled Carbon Nanotubes (MWCNTs) on glassy carbon electrodes (GCE) in pharmaceutical and water as real sample. Materials and Methods: In this experimental study, the conventional culture method (pour plate) and modified biosensor based on Multi-Walled Carbon Nanotubes on glassy carbon electrode with the arrangement of GC/MWCNTs/AuNPs/Ab/BSA were used for the detection of E. coli. Dilutions of E. coli between (1 ×101–1×108 CFU/ml) were used in pharmaceutical and water samples, prepared in 0.1 M PBS (pH 7.4), mixed with 0.5mM acetaminophen. The efficiency of the designed biosensor was investigated using SEM, Cyclic Voltammetry, and Square-Wave Voltammetry electrochemical techniques, as well as interfering bacteria. Results: The results of E. coli detection using the conventional culture and designed biosensor were not statistically significant. The designed biosensor had a high sensitivity with accuracy in 3 minutes and LOD 3.02 CFU/ml for Escherichia coli. Conclusion: Considering the time-consuming and influenced by environmental factors in the microbial monitoring of pharmaceuticals for E. coli detection in conventional methods and the risk of losing pharmaceutical products, the biosensor has good efficiency in detection with low cost and no need for enrichment in a small volume of samples. Manuscript profile -
Open Access Article
401 - Study of ability Fusarium oxysporum fungi in extracellular biosynthesis of silver nanoparticle in vitro
Golshid Sajjadi Abolfath Shojaiee Mohammad Reza Fazeli Javid Amini Hossain JamalifarBackground and Objective: Development of methods without using plotant and poisonous material and minimum wastes to produce under control nano structures is of nanotechnologist concerns. In this way biologists, by previous knowledge, nano-scale minerals controlled makin MoreBackground and Objective: Development of methods without using plotant and poisonous material and minimum wastes to produce under control nano structures is of nanotechnologist concerns. In this way biologists, by previous knowledge, nano-scale minerals controlled making by microorganism, seeking organism capable making non-organic nanoparticles. The aim of this study is extracellular production of silver nanoparticles with maximum dimention of 20 nm by Fusarium oxysporum fungi. Materials and methods: After studies to optimize growth condition, Fusarium oxysporum biomass in a medium containing yeast and malt extract is reproduced. After silver nanoparticles production in silver nitrate solution, this nanoparticles are studies by UV-Visible Spectrophotometry and Transmission Electron Microscopy (TEM) methods. Results: Studies showed that when Fusarium oxysporum biomass put in 10-3 M of silver ions, can produce silver nanoparticles in the form of extracellular. Conclusion: Because of physical and chemical particular properties of silver nanoparticles with maximum diameter of 20 nm of Fusarium oxysporum fungi, its industrial production and applied evaluation is offered. Manuscript profile -
Open Access Article
402 - The Inhibitory Effect of Doxycycline- Silver Nanoparticle Conjugate on Brucella melitensis
Mohsen Ajalli Mojtaba Salouti Hamed Alizadeh Zahra Heydari Hossein Hamzehei Aram AlizadehBackground and Objective: Brucellosis is a zoonotic disease caused by Brucella bacteria. According to recent studies, antimicrobial activity of silver nanoparticle was approved. The aim of this study was to investigate the antimicrobial activity of Doxycycline - silver MoreBackground and Objective: Brucellosis is a zoonotic disease caused by Brucella bacteria. According to recent studies, antimicrobial activity of silver nanoparticle was approved. The aim of this study was to investigate the antimicrobial activity of Doxycycline - silver nanoparticles conjugate against Brucella meltensis 16M. Material and Methods: After preparing the doxycycline-silver nanoparticle conjugate, its antimicrobial activity against Brucella meltensis 16M was determined by Well Diffusion Agar method in Muller Hintone Agar media. Also, Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of Doxycycline-silver nanoparticle conjugate was determined by Macrodilution method in Muller Hintone Broth media. Finally, antibacterial effect of the nanoparticle was assayed in animal model. Results: The results showed that Doxycycline-silver nanoparticle conjugate has antimicrobial activity against Brucella melitensis 16M in laboratory condition. In mouse model, the conjugate of Doxycycline-silver nanoparticle could decrease effectively the Brucella melitensis load in liver. Conclusion: This study demonstrated that Doxycycline-silver nanoparticle conjugate has synergistic effect on Brucella melitensis 16M and can be useful in treatment of brucellosis. Manuscript profile -
Open Access Article
403 - Evaluation of SiO2 Nanoparticles Effects on Seed Germination in Astragalus squarrosus
Reyhane Azimi Gholam Ali Heshmati Reza Kavandi -
Open Access Article
404 - Effects of Silica and Silver Nanoparticles on Seed Germination Traits of Thymus kotschyanus in Laboratory Conditions
Masoomeh Abbasi Khalaki Ardavan Ghorbani Mehdi Moameri -
Open Access Article
405 - Effect of Silver Nanoparticles on Seed Germination and Seedling Growth in Thymus vulgaris L. and Thymus daenensis Celak under Salinity Stress
Mansoureh Ghavam -
Open Access Article
406 - The effect of facilitators on enhancement of seed germination, seedling growth and establishment in some plant species
parvin rokhforoz Ardavan Ghorbani Mehdi Moameri zeynab hazbavi Masoomeh Abbasi khalaki sudabeh gharemahmoodli -
Open Access Article
407 - Study of Drought Tolerance of Wheat Inoculated with Mycorrhiza Fungi and its Interaction with Copper Nanoparticles
ّfatemeh taheri hesari hossain zahedi Alireza Eivazi younes sharghi Akbar AlipoorA split-split plot field experiment using the randomized complete block design with three replicates was carried out to investigate drought tolerance of wheat inoculated with mycorrhiza fungi and its interaction with copper nanoparticles. The factors included two irriga MoreA split-split plot field experiment using the randomized complete block design with three replicates was carried out to investigate drought tolerance of wheat inoculated with mycorrhiza fungi and its interaction with copper nanoparticles. The factors included two irrigation levels (optimum irrigation and deficit irrigation), two levels of fungal symbiosis (with or without a symbiotic relationship), and three spray concentrations of copper oxide nanoparticles (50, 250, and 450 ppm).The results of ANOVA revealed that Analysis of variance showed that proline content and spike/m2 were significant in irrigation regime, mycorrhiza, foliar application, and all the interaction effects of double and triple factors.The effect of irrigation regime, mycorrhiza and foliar application of copper nano oxide was effective on grain yield, but the effects and interactions of irrigation regime×foliar application, mycorrhiza×foliar application and irrigation regime×mycorrhiza×foliar application have no significate effect on that characteristic;Comparison of mean traits showed that the maximum number of spikes/m2 in mycorrhizal fungi application with50ppm copper nano oxide foliar application in optimum irrigation was780numbers.The highest hectolitre weight of wheat was related to triple interactions,optimum irrigation with fungus and foliar application of450ppm copper nano oxide that was not statistically significant effect with triple interactions,optimum irrigation without fungus and foliar application of 250ppm copper nano oxide.Maximum proline content was obtained in non-mycorrhizal fungi treatment with50ppm foliar spray under deficit irrigation (23.8mg/g fresh weight) which was statistically significant at least at5%level with other treatments. The highest grain yield (309.61g/m2) belonged to optimum irrigation treatment and minimum grain yield was observed in severe deficit irrigation. Manuscript profile -
Open Access Article
408 - Application of Bio-Nanocomposite Films Based on Nano-TiO2 and Cinnamon Essential Oil to Improve the Physiochemical, Sensory, and Microbial Properties of Fresh Pistachio
Arezoo Esfahani Mohammad Reza Ehsani Maryam Mizani Abdorreza Mohammadi Nafchi -
Open Access Article
409 - کاربرد بیوسنتز نانوذرات نقره با استفاده از عصاره تراکی اسپرم در کنترل پوسیدگی باکتریایی پیاز
زینب فتوحیانامروزه استفاده از نانوذرات فلزی به عنوان جایگزینی مناسب برای سموم شیمیایی خطر آن را برای محیط زیست و مصرف کنندگان کاهش می دهد. بنابراین، هدف از این مطالعه بیوسنتز نانوذرات نقره با استفاده از عصاره آبی دانههای عجوان و تأثیر آن بر پوسیدگی باکتریایی پیاز است. در این تحقیق Moreامروزه استفاده از نانوذرات فلزی به عنوان جایگزینی مناسب برای سموم شیمیایی خطر آن را برای محیط زیست و مصرف کنندگان کاهش می دهد. بنابراین، هدف از این مطالعه بیوسنتز نانوذرات نقره با استفاده از عصاره آبی دانههای عجوان و تأثیر آن بر پوسیدگی باکتریایی پیاز است. در این تحقیق ابتدا جداسازی و شناسایی باکتری های بیماری زا از مناطق مختلف شهرستان جیرفت انجام شد. سپس بیوسنتز نانوذرات نقره توسط عصاره آبی دانه عجوان انجام شد و اثرات آنها بر روی پکتوباکتریوم در شرایط آزمایشگاهی و انبار بررسی شد. در مجموع 12 جدایه باکتریایی، جدایه N3 از منطقه عنبرآباد بیشترین بیماری زایی را داشت. بیوسنتز نانوذرات نقره با مشاهده رنگ تاریخ پس از 15 دقیقه در تاریکی در دمای اتاق تایید شد و طیف سنج فرابنفش نشان داد که تشدید پلاسمون سطحی در 420 نانومتر است. نرخ مهار رشد نانوذرات نقره بیوسنتز شده و سم Mancozeb هر کدام به تنهایی و ترکیب آنها در برابر پکتوباکتریوم در شرایط آزمایشگاهی به ترتیب 45/62، 100 و 67/88 درصد بود. همچنین، نانوذرات Ag و Mancozeb هر کدام به تنهایی در مدت سه ماه و ترکیب آنها با یکدیگر در طی دو ماه باعث ماندگاری 100 درصدی پیاز در انبار شد. اما ترکیب نانوذرات نقره بیوسنتز شده و مانکوزب همراه با پکتوباکتریوم در ماه اول و دوم 100 درصد و در ماه سوم 85 درصد در برابر بیماری پوسیدگی باکتریایی مهار شد. بنابراین، نتایج نشان داد که نانوذرات نقره بیوسنتز شده در کنترل باکتری های بیماری زا موثر بوده و می توانند جایگزین سموم کشاورزی شوند. Manuscript profile -
Open Access Article
410 - Characterization, photocatalytic, and antibacterial activity of Ag–TiO2 nanoparticles prepared by electrical arc discharge method
Mahdi Hajivaliei Majid Lashkanpour -
Open Access Article
411 - Determination of mercury (II) by spectrophotometric method based on self assembly of gold nanoparticles
Yan Du Jing Yan Mei Ni Bao Du -
Open Access Article
412 - The Effect of Foliar Application of Iron and Proline Nanoparticles on Biochemical, Physiological and Agronomic Traits of Quinoa Plant in Different Cultivation Dates
RAHMAT SALEHI ABBAS MALEKI MOHAMMAD MIRZAEI HEYDARI ALIREZA RANGIN AMIR MIRZAEI -
Open Access Article
413 - Evaluation of Anticancer and Anti-bacterial Effects of Silver Nanoparticles Synthesized by Origanum majoranaL. Extract on Cancer Cells MCF-7, HeLa and A549
Reyhaneh Sezari Hamankoh Shabnam Shamaei -
Open Access Article
414 - Physiological Analysis of Silver Nanoparticles and AgNO3 Effect to Brassica napus L.
Mehrzad Sarabi Akbar Safipour Afshar Homa Mahmoodzadeh -
Open Access Article
415 - Study of Methyl tert-butyl Ether (MTBE) Photocatalytic Degradation with UV/TiO2-ZnO-CuO Nanoparticles
Mohsen Mansouri Mohsen Nademi Mohammad Ebrahim Olya Hossein Lotfi -
Open Access Article
416 - Fast Removal of Citalopram Drug from Waste Water Using Magnetic Nanoparticles Modified with Sodium Dodecyl Sulfate Followed by UV-Spectrometry
M. Khoeini Sharifabadi M. Saber Tehrani A. Mehdinia P. Abroomand Azar S. Waqif Husain -
Open Access Article
417 - Green Synthesis of Silver Nanoparticles Using Pimpinella anisum L. Seed Aqueous Extract and Its Antioxidant Activity
Hashem Akhlaghi Sedighe sadat Akhlaghi -
Open Access Article
418 - Zinc Oxide Nanoparticles Absorption Rate in the Heart Tissue of Female Mice
Ramona Kasra Kermanshahi Vida Hojati Abdolhossein Shiravi -
Open Access Article
419 - The Possible Protective Role of Vitamin E on the Induced Silver Nanoparticles Toxicity on Filiform and Circumvallate Tongue Papillae of Albino Rats Histological and Immunohistochemical Study
Nada Tarek Zaki Mahmoud Mohamed Al Ankily Reham Magdy Amin Ahmed Mahmoud Halawa -
Open Access Article
420 - Antimicrobial Potentials of Iron Oxide and Silver Nanoparticles Green-Synthesized in Fusarium solani
Masoomeh Sasani Ebrahim Fataei Reza Safari Fatemeh Nasehi Marzieh Mosayyebi -
Open Access Article
421 - Adsorptive Removal of Noxious Nickel Ions from Aqueous Mediums Using Titanium Dioxide Nanoparticles: A Comparative Assessment with an Eco-friendly Adsorbent as Well as Isotherm and Kinetic Modeling
Elnaz Rezaei-Aghdam Ali Shamel Mohammad Khodadadi-Moghaddam Gholamreza Ebrahimzadeh-Rajaei Sahar Mohajeri -
Open Access Article
422 - The Influence of Zinc Oxide Nanoparticles on Blood Markers in Domestic Pigeons (Columba livia)
Mehran Arabi Hamid-Reza Naseri -
Open Access Article
423 - Removal of Lead and Mercury from Water Using Nanoparticles: A Concise Review on Adsorption
Nusrat Tonu Md. Tanzirul Tanaz Md. Ismail Hossain Sumon Chakrabarty Palash Dhar Mohammad Yousuf Parbhej Ahamed -
Open Access Article
424 - Copper manganese ferrite nanoparticles production via co precipitation method and study of its sensitivity property for ethanol detection
Hamid Reza Ebrahimi Majid Mozaffari Hasan Ghafuri Varzaneh Syed Alireza SororiA copper manganese ferrite nanoparticles from effective ferrites that applicable in sensitivity investigations was prepared in this study. Co-precipitation method was used for synthesis of this ferrite that is useful method for synthesizing of these compounds. For struc MoreA copper manganese ferrite nanoparticles from effective ferrites that applicable in sensitivity investigations was prepared in this study. Co-precipitation method was used for synthesis of this ferrite that is useful method for synthesizing of these compounds. For structure evaluation, X-ray diffraction (XRD) experiments for phase formation confidence and transmission electron microscopy (TEM) for formation of nanoparticles below 30 nm scale confidence were used. By X-ray fluorescence (XRF) experiment exact percent of each element was determined in copper manganese ferrite compound. By (AGFM) experiments the magnetic behavior of powder and disk sample of copper manganese ferrite nanoparticles was determined. For sensitivity properties investigation of these nanoparticles, mentioned nanoparticles were converted to a tablet form. This tablet was putted in a temperature controlled box. Nine solvents were vaporized (gases) and exposed to this nanoparticles. Responses to these gases were transmitted to a computer by an electronic board connection. Result information was analyzed by software. Sensitivity study of this nano sensor was tested by using carbon tetrachloride, ethanol, methanol, acetonitrile, acetone, vinyl acetate, acrylonitrile, ammonia and formamide. Among these gases ethanol had the best sensitivity in 100˚C temperature. Manuscript profile -
Open Access Article
425 - Electrophoretic deposition of SiC nanoparticles
علی گلشنی عجب شیر حسین آقاجانی محمد جعفرپور سهند بهرنگیThe aim of this research is to investigate the stability of SiC nanoparticles for deposition on C/C composite by EPD method. Thus, different suspensions were prepared with different solvents and in presence of PEI as dispersant. The stability of suspensions was studied MoreThe aim of this research is to investigate the stability of SiC nanoparticles for deposition on C/C composite by EPD method. Thus, different suspensions were prepared with different solvents and in presence of PEI as dispersant. The stability of suspensions was studied by using their macroscopic pictures after 24 h, and measurement of zeta potential values and particle size distribution. Thereafter, the coating was applied onto the substrate using the optimized suspension. The results showed that the suspension prepared in ethanol, with pH=10 and addition of 6 wt% PEI has the best stability. Also, SEM micrographs revealed that the coating applied with the voltage of 30 V results in a better quality and has a uniform and pitiless surface. Manuscript profile -
Open Access Article
426 - Fabrication of Al2O3/SiC Nanoparticles from the Rice Hush Ash via Self-Propagation High-Temperature Synthesis and Ball Milling
قاسم دینی Morteza HoseiniIn this study, silica obtained from the rice hush was used to synthesis of Al2O3/SiC nanoparticles. The rice husk is an agricultural residue abundantly available in rice producing countries such as Iran. For this reason, the ash obtained from the burning of the rice hus MoreIn this study, silica obtained from the rice hush was used to synthesis of Al2O3/SiC nanoparticles. The rice husk is an agricultural residue abundantly available in rice producing countries such as Iran. For this reason, the ash obtained from the burning of the rice hush which contains more than 93% silica, and aluminum and carbon powders with the molar ratios of 3:4:6 were mixed and then pressed into pellets by using a cylindrical die under a pressure 50MPa. In order to conduct the Self-Propagation High-Temperature Synthesis (SHS), the produced pellets were placed in an electrical furnace at 850oC under the argon gas atmosphere. Then, a planetary ball-milling for 4, 8, 12, 16 and 24h was used to decrease the particle size of the synthesized composite. The results of XRF, XRD, SEM and DLS investigations shown that the rice hush ash can be used to fabricate Al2O3/SiC nanoparticles via SHS and ball-milling and the size of synthesized particles after ball milling for 4-24h is in the range of 870-65nm. Manuscript profile -
Open Access Article
427 - Study catalytic effect of CeO2 nanoparticle on thermal decomposition of ammonium perchlorate
Esmaeil Ayoman Shahrdad Arastoo Marjan Tahriri Mozhgan TahririStudy catalytic effect of CeO2 nanoparticle on thermal decomposition of ammonium perchlorate ABSTRACT This work studied on the thermal decomposition of ammonium perchlorate activated by addition of commercial CeO2 nanoparticles. CeO2 nanoparticles were characterized by MoreStudy catalytic effect of CeO2 nanoparticle on thermal decomposition of ammonium perchlorate ABSTRACT This work studied on the thermal decomposition of ammonium perchlorate activated by addition of commercial CeO2 nanoparticles. CeO2 nanoparticles were characterized by X-ray diffraction (XRD) and transition electron microscope (TEM). The TEM study revealed that the majority of CeO2 particles are of 10–30 nm in size. The catalytic activities of CeO2 nanoparticles on the thermal decomposition of ammonium perchlorate were investigated by thermogravimetric analysis (TGA) coupled with differential scanning calorimeter (DSC). The results imply that the catalytic performance of CeO2 nanoparticles is significant and the decrease in the thermal decomposition temperature and the increase in the heat decomposition AP. So that, adding 2 Wt.% of CeO2 nanoparticles to AP decreases the thermal decomposition temperature from 423.89 to 330.89 °C. Also, Adding 2 Wt.% of CeO2 nanoparticles to AP increases the heat decomposition from 835 to 1517.22 J/g. Keywords: CeO2 Nanoparticles, Catalytic Activity, Ammonium Perchlorate, Thermal Decomposition. Manuscript profile -
Open Access Article
428 - Investigations of ethanol, ethylene glycol and deionized water solvents effects on structural and optical properties of Ag-CuO hybrid nano-material synthesized by solvo/hydrothermal-microwave method
Mehrdad Soltani Farid Jamali-SheiniIn this research work, the synthesis of hybrid silver (Ag) and copper oxide (CuO) was carried out by solvo/hydrothermal-microwave process in the deionized water (H2O), ethanol (C2H6O) and ethylene glycol (C2H6O2) solvents and the effects of solvent type on structural an MoreIn this research work, the synthesis of hybrid silver (Ag) and copper oxide (CuO) was carried out by solvo/hydrothermal-microwave process in the deionized water (H2O), ethanol (C2H6O) and ethylene glycol (C2H6O2) solvents and the effects of solvent type on structural and optical properties were studied. The obtained samples were characterized by X-ray diffractometer (XRD), scanning and transmission electron microscopies (SEM and TEM), photoluminescence (PL) and absorption spectroscopies (UV-Vis). The XRD study of the samples showed presence of Ag (Cubic) and CuO (Monoclinic (phase in the obtained materials. Elemental analysis (EDS) showed presence of Ag, Cu, and O in the samples. Electron microscopes images revealed non-regular and impacted samples of Ag and CuO. The intensity of emission band of synthesized nanostructures in ethanol and ethylene glycol were reduced and it was observed a shift in the absorption edge towards lower wavelength (blue shift) in compared with synthesized samples in deionized water. Manuscript profile -
Open Access Article
429 - Investigation of Microstructural and Mechanical Properties of Tungsten Disulfide (WS2) /Aluminum Matrix Nanocmposite
hossein salehi vaziri ali shokuhfar Seyyed Salman Seyyed AfghahiIn this research, WS2 nanoparticles were synthesized using hydrothermal method and then added to aluminum matrix as reinforcement. Nanocomposites were fabricated by powder metallurgy processing followed by Spark Plasma Sintering (SPS) consolidation. Transmission electro MoreIn this research, WS2 nanoparticles were synthesized using hydrothermal method and then added to aluminum matrix as reinforcement. Nanocomposites were fabricated by powder metallurgy processing followed by Spark Plasma Sintering (SPS) consolidation. Transmission electron microscopy (TEM) and XRD of synthesized powder showed WS2 nanoparticles were synthesized successfully. Microstructural properties of nanocomposites were investigated using optical microscopy (OM), field emission scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDS). Nanoparticles were well distributed in the aluminum matrix and have a good dispersion. The presence of nanoparticles in the matrix reduces the size of the grain less than 20 µm so that the size of the grain becomes smaller by increasing the amount of nanoparticles .The density of the sample showed that the nanocomposite had a very good compressibility and relative density reach to near 99% in 4wt. %WS2. Hardness and compressive strength of nanocomposites were evaluated. Mechanical evaluations indicated that, the increase in weight fraction of WS2 nanoparticles, resulted in improvement of hardness and compressive strength of aluminum. Concentration of tungsten disulfide nanoparticles has a direct effect on increasing the mechanical properties of nanocomposite. The compressive strength increased up to 120 MPa, about twice the base metal, and the hardness raised up to 30%. Manuscript profile -
Open Access Article
430 - Production of cupper manganese ferrite cadmium doped nanoparticles via co precipitation method and study of its sensitivity property for methane gas detection in telecommunications centers
Hossein Emami Seyed Mohsen EtesamiIn this study, synthesis and studying sensitivity of nano particles of manganese copper ferrite with common formula of cupper manganese ferrite cadmium doped has been considered. Applied method for manufacturing this nanoparticle is co-precipitation method that is a nov MoreIn this study, synthesis and studying sensitivity of nano particles of manganese copper ferrite with common formula of cupper manganese ferrite cadmium doped has been considered. Applied method for manufacturing this nanoparticle is co-precipitation method that is a novel method for this combination. Nano particle structure has been investigated using experiments such as X-ray diffraction which showed single–phase and Nano characteristics of this combination and scanning electron microscope which showed the size of nanoparticles and uniformity. Sensitivity of the nano particles was tested using a laboratory system equipped with sensor heater with the ability of temperature control on which nano sensor was put, a chamber for injecting related materials and a connector electronic range that transferred Nano-sensor information to computer and it was analyzed by a software. This system could control temperature. This Nano sensor was tested using Methane that sensitivity and suitable temperature for this Nano sensor was 300˚C. Manuscript profile -
Open Access Article
431 - Synthesis and Characterization of polyurethane/silver nanocomposite by Microwave assisted
seyed mohamad kazemzadeh Mohamad Reza Vaezi Seyyed Mohammad Mehdi Hadavi Masoud EsfandehIn this study, the dielectric heating was performed by microwave irradition to synthesize polyurethane/silver nanocomposite, which was carried out by distributing and dissolving silver nitrate salt in the polyurethane and the reduction of silver cation retained in ethyl MoreIn this study, the dielectric heating was performed by microwave irradition to synthesize polyurethane/silver nanocomposite, which was carried out by distributing and dissolving silver nitrate salt in the polyurethane and the reduction of silver cation retained in ethylene glycol micelles in the prepolymer solutions. Decreasing the time and number of synthesis processes and, consequently, reducing production costs is one of the advantages of this technique. During the chemical reactions, microwave waves with constant intensity and frequency at 30, 60, 90, 120 seconds were applied to solvent prepolymer by a microwave oven. By completion of the chemical reactions, silver nanoparticles were synthesized in a polyurethane matrix. The effect of microwave and insitu synthesis of and silver nanoparticles on chemical bonding of polyurethane in terms of structure, morphology, composition and particle size distribution were studied by using UV-Vis spectroscopy, X-ray diffraction (XRD), transmitted electron microscopy (TEM), X-ray diffraction spectroscopy (EDX) and Fourier transform infrared spectroscopy (FTIR) analysis. Produced nanoparticles have spherical and semi spherical morphology with particle size distribution in the range of 10 to 80 nm, and the fcc crystalline structure and uniform dispersion in the polyurethane matrix. Meanwhile, Fourier transform infrared spectroscopy of nanocomposites showed synthesis of silver nanoparticles no negative effect on polyurethane chemical bonds by this method. Manuscript profile -
Open Access Article
432 - Synthesis of Cadmium Doped Nickel Copper Ferrite Nanoparticles and Investigation of Their Sensing Properties for the Detection of Acetonitrile in Little Accounts
Hossein Emami Hamid Reza EbrahimiIn this study cadmium doped nickel copper ferrite Ni0.5Cu0.5Fe2O4 (cd doped) nanoparticles with spinel structure were synthesized using co-precipitation method. The nanoparticles were employed as a gas sensing material. X-ray diffraction (XRD), X-ray fluorescence (XRF) MoreIn this study cadmium doped nickel copper ferrite Ni0.5Cu0.5Fe2O4 (cd doped) nanoparticles with spinel structure were synthesized using co-precipitation method. The nanoparticles were employed as a gas sensing material. X-ray diffraction (XRD), X-ray fluorescence (XRF) and transmission electron microscopy (TEM) techniques were used to characterize the nanoparticles structure. The sensing behavior of the nanoparticles was examined in the presence of different gases including. Acetone, acetonitrile, acrylonitrile, formamide, caron tetrachloride, vinyl acetate, ethanol, ammonia, and methanol. The characterization process was performed for a concentration of a 200 ppm and within a temperature interval from 50 ˚C to 300 ˚C and the best sensing behavior was found to be at 200 ˚C. Furthermore, various concentrations of acetonitrile gas at 200 ˚C within a concentration interval of 20 to 200 ppm were tested and it is found that the higher concentrations will result in a better response. Manuscript profile -
Open Access Article
433 - One-step synthesis of superparamagnetic iron oxide nanoparticles doped with zinc cations and coated with saccharides for biomedical applications
Hamze Foratirad Mustafa AghazadeIn this paper, three-types of metal-cations doped superparamagnetic iron oxide nanoparticles (IONs) including glucose-grafted Zn2+-doped MNPs (glucose/Zn-IONs), sucrose-grafted Zn2+-doped IONs (sucrose/Zn-IONs) and starch-grafted Zn2+-doped IONs (starch/Zn-IONs) are rep MoreIn this paper, three-types of metal-cations doped superparamagnetic iron oxide nanoparticles (IONs) including glucose-grafted Zn2+-doped MNPs (glucose/Zn-IONs), sucrose-grafted Zn2+-doped IONs (sucrose/Zn-IONs) and starch-grafted Zn2+-doped IONs (starch/Zn-IONs) are reported. These IONs are fabricated by OH– ions electrochemical generation through cathodic deposition method. The saccharide capped layer onto the surface of deposited IONs and also zinc cations doping into their crystal structure were confirmed via Fourier-transform infrared spectroscopy, Field-emission scanning electron microscopy and Energy Dispersive X-ray techniques. Figures of the Field-emission scanning electron microscopy showed that the morphology of particles synthesized is spherical. Analyses revealed magnetite crystal structure with about 10% doped zinc for all the prepared samples. The magnetic evaluations by sample vibrating magnetometer (VSM) technique specified the superparamagnetic behaviors for the prepared samples, where low coercivity and remanence values (i.e. Hci=8.9Oe and Mr=0.24 emu/g for glucose/Zn- IONs; Hci=3.6Oe and Mr=0.09 emu/g for sucrose/Zn- IONs; Hci=9.2Oe and Mr=0.28 emu/g for starch/Zn- IONs) were observed. Manuscript profile -
Open Access Article
434 - Bubble absorption enhancement in water-based nanofluids using nickel oxide nanoparticles in the presence of surfactant
Danial Jafari Farsaani Elham AmeriTo solve the problems caused by the use of chemical solvents such as amine solutions and caustic solution, a single bubble adsorption tower was used to investigate the effect of water-based nanofluids with nickel oxide nanoparticles on the CO2 adsorption process. CO2 wa MoreTo solve the problems caused by the use of chemical solvents such as amine solutions and caustic solution, a single bubble adsorption tower was used to investigate the effect of water-based nanofluids with nickel oxide nanoparticles on the CO2 adsorption process. CO2 was introduced as single bubbles from the end of a column, and the mass transfer coefficients and adsorption rates were investigated. The results showed that nickel oxide nanoparticles are hydrophobic and the addition of surfactant to nanofluid increases the surface electric charge of nickel oxide nanoparticles and increases the surface polarity for gas absorption. In this way, carbon dioxide gas is absorbed on the surface of nanoparticles due to its very polar nature, and this phenomenon increased the amount of gas absorption in the nanofluid by 270% compared to the base fluid.The maximum mass transfer flux for adsorption of CO2 with nanofluids containing nickle oxide nanoparticles was observed in the weight fraction of nanoparticles of 0.1%. To investigate the effect of important parameters on the mass transfer process in a single bubble tower, the parameters of nanoparticle weight fraction, gas injection nozzle diameter, with different levels were investigated. Finally, an experimental relationship was presented to estimate the mass transfer coefficient of CO2 gas, which is a function of the flow regime and microscopic structure of nanoparticles. The results showed that the amount of computational error for the proposed model is less than 20% and this model can estimate the laboratory results with a suitable approximation. Manuscript profile -
Open Access Article
435 - Fabrication and Optimization of Humidity Sensor Based on Porous Nanostructure Tungsten Trioxide / Silver Nanoparticles
Ayub Karimzad Ghavidel Gholamreza Kiani Mahsa MahdaviniaThe aim of this research is to fabricate a moisture sensor based on porous nanostructure of pure tungsten trioxide (WO3) and doped with silver nanoparticles (SN), and to use the properties of ohmic changes, capacitance and impedance versus moisture as output. The struct MoreThe aim of this research is to fabricate a moisture sensor based on porous nanostructure of pure tungsten trioxide (WO3) and doped with silver nanoparticles (SN), and to use the properties of ohmic changes, capacitance and impedance versus moisture as output. The structural characteristics of the prepared nanocomposite were examined by a scanning electron microscope and X-ray diffraction spectroscopy. The results showed that synthetic WO3 is in the form of spheres with dimensions of 3 to 7 μm, with a surface porous structure in size of 10 to 60 nm. To fabricate the sensors, first the materials were mixed and dispersed, then coated on the interdigitated electrode by sedimentation method. The investigation showed that the doped sensor with SN have a better performance in comparison with WO3 sample. Its sensitivity was obtained 4.4 and 0.68 MΩ/%RH for the relative humidity range of 20-50% and 50-90%, respectively, improved 7 and 5% compared to similar previous samples. The response and recovery time of this sensor was measured approximately 2 and 7 seconds, which is 37.5 and 41.4 times smaller than available samples, respectively. Decreasing the capacitance of the sensor to 3800 Pf by increasing the relative humidity to 90% is another finding. Significant impedance changes of the sensor versus the humidity alternations is other important result, showing that the impedance can be considered as a sensor output by compensating for errors of ohmic changes and capacitance. Manuscript profile -
Open Access Article
436 - Functionalization and stable synthesis of PET-AuNPs nanocomposites by sonochemistry and electrochemical quantitative and qualitative studies with modified AuNPs-PET / CNT / Au electrode
Javad Moradpour Hossein Peyman Hamideh RoshanfekrPolyethylene terephthalate is used in various industries, but due to the lack of functional groups on the surface, it is limited in use and needs surface modification to improve the application. In this study, the surface of PET fibers was first functionalized with carb MorePolyethylene terephthalate is used in various industries, but due to the lack of functional groups on the surface, it is limited in use and needs surface modification to improve the application. In this study, the surface of PET fibers was first functionalized with carboxylic acid groups. Then, in an alkaline medium, gold nanoparticles were synthesized sonochemically on their surface, and the effect of parameters affecting the size and density of nanoparticles was investigated and optimized (temperature, power of ultrasonic device, and pH). The ability of PET-AuNPs nanocomposites to remove industrial dyes from the environment was used, and the removal and measurement of methyl orange dye from aqueous media were used. The effect of initial dye concentration, time, and pH was investigated and optimized. In quantitative electrochemical dye measurements, the modified AuNPs-PET / CNT / Au electrode had a linear response in the range of 20 to 60 μM. The detection limit of this electrode was 55 μM, and the effect of potential scanning speed on peak flow and the effect of solution pH were investigated. Adsorption equation studies have shown that adsorption follows the obedience isotherm. Manuscript profile -
Open Access Article
437 - In vitro investigation of the GdF3:Bi nanoparticles synthesized via hydrothermal method as the dual MRI-CT contrast agent
Mohammad Abbasi رضا احمدی Amirhossein Moghanian Aazam Jannati EsfehaniIn the present study, the Bismuth doped GdF3 nanoparticles were synthesized via the hydrothermal method and the effect of temperature, time and NH4F concentration was investigated. The Poly Ethylene Glycol was used as the surfactant. The phases characterization was indu MoreIn the present study, the Bismuth doped GdF3 nanoparticles were synthesized via the hydrothermal method and the effect of temperature, time and NH4F concentration was investigated. The Poly Ethylene Glycol was used as the surfactant. The phases characterization was inducted via XRD, FE-SEM and EDS techniques. The in vitro investigation of the samples as the contast agents were performed using MR and CT imaging. the sample synthesized at 180 oC,, 6 hours and the NH4F concentration twice the Stoichiometric concentration that had the semi spherical structure with mean size lower than 100 nm was the suitable sample and the in vitro studies show that the particles act as an excellent CT contrast agent and also as an effective MRI contrast agent at concentrations between 22.5 and 180 mM. Briefly, The use of Bismuth dopant ant GdF3 nanoparticles was successfully performed and The particles can used as the potential MRI-CT contrast agents. Manuscript profile -
Open Access Article
438 - Investigation of Deposition Amount of Zinc Oxide Nanoparticles with Various Doses in Spleen of Female Mice
R. Kasra A. Shiravi V. HojatiDue to the increasing production of ZnO nanoparticles and their useful applications in biological systems, fewer studies have been performed about the side effects of these substances on the organism's body. To this end, in this study, we have investigated the depositio MoreDue to the increasing production of ZnO nanoparticles and their useful applications in biological systems, fewer studies have been performed about the side effects of these substances on the organism's body. To this end, in this study, we have investigated the deposition amount of zinc oxide nanoparticles on spleen of Syrian female NMRI mice. In this experimental study, 20 heads of female NMRI mice have been studied in the experimental and control groups. ZnO nanoparticles at concentrations of 100 and 300 mg per kg fed in the drinking water for 28 days, and after 28 days the mice were sacrificed, spleen tissue was removed and solved in the acid, and then the amount of deposited zinc oxide in the tissues was measured by atomic absorption spectrophotometry. According to the obtained results, it is observed that there are significant differences between the consumer groups (of ZnO nanoparticles) and control group. Deposition of Zinc oxide nanoparticles which was studied in the drinking water for 28 days in the mentioned experimental groups has had significant effects on the spleen. Manuscript profile -
Open Access Article
439 - Investigation on the Effect of Zinc Oxide Nanoparticle on LH, FSH and Testosterone Hormones in Adult Male NMRI Mice
زیبا مظفری نسیم حیاتی رودباری کاظم پریور شیوا ایرانیNanoparticles have widespread application in all aspects of modern life because of unique features of them as small size and high surface area Several studies have been done to explore the probable detrimental effects of nano-particles on human reproduction. The objecti MoreNanoparticles have widespread application in all aspects of modern life because of unique features of them as small size and high surface area Several studies have been done to explore the probable detrimental effects of nano-particles on human reproduction. The objective of this study was to investigate the effect of zinc oxide nanoparticles on LH, FSH and testosterone hormones in adult male mice. In the present study, 30 NMRI mice were divided into 5 groups. Single injection with different doses of zinc oxide nano particles were applied intraperitoneally (250, 500 and 700 mg/kg). Then serum level of LH, FSH and testosterone hormones were measured using ELISA method. The results were analyzed by ANOVA and Tukey test. The results showed that zinc oxide nanoparticles in 250 and 700 mg/kg doses caused a significant increase in FSH and testosterone level in blood serum respectively compared with control group. This study showed that effects of nano zinc oxide is dose-dependent and Causes increase in Testosterone and FSH hormones while caused no significant change in LH hormone level. Manuscript profile -
Open Access Article
440 - The Effect of the Iron Magnetic Nanoparticles on the Expression of P53 Protein in Brain Tissue of the Balb/C Mice by Immunohistochemically Method
L. Farhadi V. Hojati A. ShiraviDue to physico-chemical properties of nanoparticles as drug carriers are widely used in the treatment of cancerous cells in living environments. The nanoparticles can be used for targeted drug delivery and effective to the site of infection. Iron magnetic nanoparticles MoreDue to physico-chemical properties of nanoparticles as drug carriers are widely used in the treatment of cancerous cells in living environments. The nanoparticles can be used for targeted drug delivery and effective to the site of infection. Iron magnetic nanoparticles have biologically active properties and can enter into the reticuloendothelial system by phagocytosis or endocytosis, or can be trapped by phagocytic cells such as monocytes, macrophages and oligodendrocytes. The nanoparticles can hurt cells by increasing oxidative stress. P53 is a tumor suppressor protein and it is disabled or impaired function in most human cancers. The aim of this study was to evaluate the effect of iron oxide nanoparticles on the expression of P53 protein in the brain tissue of mice Balb/C. For this purpose, 15 male mice were divided into three groups (five in each group). The treatment groups 1 and 2 during 8 days, received doses of 100 and 300 ppm magnetic nanoparticles of iron daily by intraperitoneal injection. At the end of eight days, the animals dissected and their brains were removed and were undergone immunostaining with Avedin. The results showed that iron oxide nanoparticles penetrate into brain tissue and causing inflammatory response and cause increasing in P53 protein. It seems that high concentrations of iron oxide nanoparticles have a significant effect on the expression of P53 protein. Manuscript profile -
Open Access Article
441 - Biosynthesis of Zinc Oxide Nanoparticles Using Curcumin and Evaluation of its Antioxidant Activity and Cytotoxicity
Elaheh Dianati Vida Hojati Jina Khayatzadeh Saeideh ZafarbalanejadBiocompatibility and stability of zinc oxide nanoparticles (ZnO NPs) synthesized using plants due to their wide applications in biomedical, industrial, cell imaging and biosensors is an interesting research field in the arena of nanotechnology. The present study involve MoreBiocompatibility and stability of zinc oxide nanoparticles (ZnO NPs) synthesized using plants due to their wide applications in biomedical, industrial, cell imaging and biosensors is an interesting research field in the arena of nanotechnology. The present study involved the synthesis of green stable zinc oxide nanoparticles using zinc acetate and aqueous extract of turmeric as a reducing agent. In this characterization study, the antioxidant and cytotoxic activities of the synthesized nanoparticles were investigated by different methods. First, nanoparticles were synthesized by green method and the properties of synthesized nanoparticles were investigated using various spectroscopic and microscopic techniques. Assessment of antioxidant activity was performed using DPPH free radical scavenging and cytotoxicity activity in fibroblasts by MTT method. The involvement of the bioactive compounds of curcumin in the stabilization of zinc oxide nanoparticles was confirmed by FTIR. FESEM electron microscopy showed irregular spherical, rod, and plate-like morphology with uneven surface. Antioxidant activities performed using the free radical scavenging method DPPH showed IC50 values higher than 500 μg/ ml. In addition, biosynthesized zinc oxide nanoparticles showed significant toxic effects on fibroblasts in a concentration and time dependent manner. In general, zinc oxide nanoparticles were synthesized through a sustainable, simple, and environmentally friendly green pathway using curcumin. Biosynthesized zinc oxide nanoparticles showed antioxidant activity and cytotoxicity. Manuscript profile -
Open Access Article
442 - The Effect of Magnesium Oxide Nanoparticles on Oxidative Stress in a Parkinson's Model of Male Rats
Hoda Ghorbani moghaddam Akram Eidi Pejman Mortazavi Shahrbanoo OryanSince limited studies have evaluated the antioxidant effects of magnesium oxide nanoparticles on Parkinson's disease, the aim of this study is to investigate the effect of magnesium oxide nanoparticles (MON) on oxidative stress in the Parkinson's model in mice. In this MoreSince limited studies have evaluated the antioxidant effects of magnesium oxide nanoparticles on Parkinson's disease, the aim of this study is to investigate the effect of magnesium oxide nanoparticles (MON) on oxidative stress in the Parkinson's model in mice. In this experimental study, 54 adult male rats were divided into nine groups of six, including: healthy control group, parkinsonian control group receiving 6-hydroxydopamine in the lateral ventricle, sham group receiving normal saline and healthy experimental group receiving magnesium oxide nanoparticles in doses of 2.5, 5 and 10 mg/kg and experimental Parkinson's groups that in addition to inducing Parkinson's, received magnesium oxide nanoparticles in doses of 2.5, 5 and 10 mg/kg. Administration of nanoparticles was intraperitoneal for 30 days. After that, oxidative stress parameters MDA, CAT and SOD were measured in the brain tissue. The results of the present study showed that treatment with magnesium oxide nanoparticles significantly reduced the amount of oxidative stress parameters in the brain tissue (p < 0.05). Magnesium oxide nanoparticle treatment in doses of 5 and 10 mg/kg decreased MDA in parkinsonian groups compared to parkinsonian control animals. Also, the treatment of magnesium oxide nanoparticles in doses of 5 and 10 mg/kg in the parkinsonian group caused a significant increase in the activity of SOD and CAT enzymes compared to parkinsonian control animals. As a result, it can be said that magnesium oxide nanoparticle can play a promising role with its effectiveness in reducing oxidative stress processes in Parkinson's model. Manuscript profile -
Open Access Article
443 - Protective Effect of Curcumin on Hepatic Enzyme Transaminases and Alkaline Phosphatase in Male Rats After Receiving Nickel Nanoparticles
Rahimeh Khezri Motlagh Akbar Vahdati Seyed Ebrahim Hosseini Mohammad Amin EdalatmaneshNickel nanoparticles are widely distributed in the environment, resulting in damage to various tissues of body, including the lung, liver, testis, and kidney which is the major effect on the liver tissue. Therefore, this study aims to investigate Curcumin protective eff MoreNickel nanoparticles are widely distributed in the environment, resulting in damage to various tissues of body, including the lung, liver, testis, and kidney which is the major effect on the liver tissue. Therefore, this study aims to investigate Curcumin protective effect on the number of enzymes (ALT, AST, and ALP) to obtain nickel nanoparticles in rats. In this experimental study, 50 Wistar adult male rats were randomly selected and divided in to five groups (control, witness, receiver group (nickel 50 mg/kg), receiver group (nickel 50 mg/kg + Curcumin 150 mg/kg), and receiver group (nickel 50 mg/kg + Curcumin 300 mg/kg). The treatment of rats continued for 28 days. In the end, after bloodletting of rats, (ALT, AST and ALP) enzymes were investigated. Nickel nanoparticles caused a significant difference in Serum level of Aspartate Aminotransferase, Alanine aminotransferase, and Alkaline Phosphatase enzymes in the class of p < /em> ˂ 0.0001 than the control group. While, Curcumin in different dosages caused a significant reduction in the serum level of enzymes expressed at the class of p < /em> ˂ 0.0001 ratio to the control group. The treatment by Curcumin results in reducing the liver damage induced by nickel nanoparticles. Also, we can say that the concurrent consumption of Curcumin with nickel nanoparticle due to the antioxidant properties of Curcumin reduces this activity Manuscript profile -
Open Access Article
444 - The Effect of Silver Nanoparticles on the Viability of Lung Fibroblast Cell Line (MRC-5)
Yasaman Dastgir Zahra Keshtmand Katayoun BorhaniSilver nanoparticles (AgNPs) with very strong antimicrobial and anti-proliferative properties are widely used in medical sciences. However, little is known about their effect on healthy cells, and there were the reports of their toxicity. This study aimed to investigate MoreSilver nanoparticles (AgNPs) with very strong antimicrobial and anti-proliferative properties are widely used in medical sciences. However, little is known about their effect on healthy cells, and there were the reports of their toxicity. This study aimed to investigate the effect of silver nanoparticles on the viability rate of the MRC-5 cell line. In this experimental study, during 24, 48, and 72 hours, different concentrations of silver nanoparticles (1.56, 3.125, 6.5, 12.5, 25, 50, and 100 μg/ml) per category MRC-5 cells were examined by MTT assay. Data were analysed using SPSS software, one-way ANOVA, Tukey test, and a significant level of p < /em> < 0.05. The treatment of normal MRC-5 cells with different concentrations of silver nanoparticles after 24, 48, and 72 hours by MTT method showed a significant reduction in the viability of cells at concentrations of 25, 50, and 100 μg/ml (p < /em> < 0.05). The results of this study showed that silver nanoparticles have a dose-dependent inhibitory effect on normal MRC-5 cells. Manuscript profile -
Open Access Article
445 - Evaluation of Protective Effects of PLGA Nanoparticles Containing Detoxified Lipopolysaccharide (LPS) Derived from Acinetobacter Baumannii in Mouse Lung Infection
Afshin Gholizadeh Reza Shapoori Parviz Pakzad Mehdi Mahdavicommon microbial pathogens with antibiotic resistance in causing respiratory infections in patients admitted to the ICU. Making a vaccine can be one of the effective ways to combat this infection. This study was performed to evaluate the protective effects of PLGA nanop Morecommon microbial pathogens with antibiotic resistance in causing respiratory infections in patients admitted to the ICU. Making a vaccine can be one of the effective ways to combat this infection. This study was performed to evaluate the protective effects of PLGA nanoparticles containing detoxified lipopolysaccharide (D-LPS) of Acinetobacter baumannii as a vaccine in mouse lung infection. Müller Hinton Broth culture medium was used for mass propagation of bacteria. Bacterial LPS was extracted by hot water-phenol method and detoxified with 0.2M NaOH. Encapsulation of detoxified LPS in PLGA particles was performed by Double emulsion solvent evaporation (Water/Oil/Water emulsion). The prepared particles were between 150 and 200 nm in diameter with a negative surface charge. Forty Balb/C mice were randomly divided into four groups of 10 (control, PLGA-receiving group, D-LPS-receiving group, and PLGA-D-LPS-receiving group). All groups were vaccinated three times at intervals of 14 days. On day 35, live bacteria were delivered to the groups through the lungs, and after 48 hours, the mice’s lungs were removed for bacteriological and histopathological studies. Culture of homogenized extract of lung tissue showed a significant difference between group 4 and other groups. (P <0.05) Histological study also showed the protective effect of PLGA nanoparticles containing detoxified LPS. This study showed that PLGA particles containing detoxified LPS of Acinetobacter baumannii were successful in stimulating the immune system of mice and could be used as a vaccine.. Manuscript profile -
Open Access Article
446 - Effects of Ovo Injection of Silver Nanoparticles on Immune System Response in Broiler Chickens
Samira Arabameri Firooz Samadi Behrooz Dastar Zarbakht Ansari Reza MobaseriIn this study, the effect of ovo injection of silver nanoparticles on the immune system response of broilers was studied. In this regard, 560 eggs were randomly divided into four groups with four replications. Experimental groups included: 1) positive control (injection MoreIn this study, the effect of ovo injection of silver nanoparticles on the immune system response of broilers was studied. In this regard, 560 eggs were randomly divided into four groups with four replications. Experimental groups included: 1) positive control (injection of 1 mL of physiological serum on the seventh day of incubation), 2) negative control (no injection of physiological serum), 3) injection of 20 mg silver nanoparticles, and 4) injection of 40 mg silver nanoparticles per it was an egg. The injection of silver nanoparticles and the control group was performed on day 7 of the incubation period. At the end of the incubation period, the chicks were counted to check the percentage of hatchability and after weighting, they were slaughtered to check the parameters of the immune system. There was a significant difference in hatching percentage in experimental groups (p <0.05) so that the negative control group showed the highest percentage of hatching chickens. Silver nanoparticles improved the growth of chickens during the incubation period (p <0.05) so that the group receiving 20 mg of silver nanoparticles showed the highest body weight. Silver nanoparticles significantly increased the relative weight of liver and spleen (p <0.05). Immunoglobulin G (IgG, M (IgM) concentration, total white blood cell count, and heterophile to lymphocyte ratio did not show significant differences (p >0.05). Hepatic tumor necrosis factor-alpha (TNF-α) gene expression Interleukin (6) (IL-, beta-modifying growth factor (TGF-β)) and insulin-like growth factor-1 (IGF-1) showed significant differences in the experimental groups (p <0.05). The group receiving 20 mg of silver nanoparticles showed the highest level of gene expression. In general, the results of this study showed that ovo injection of silver nanoparticles strengthens the immune system of broilers. Manuscript profile -
Open Access Article
447 - Evaluation of Antioxidant, Anti-inflammatory and Antibacterial P with Anbernesara Smoke Extract
Roya Mahdizadeh Mohsen Firoozrai Masoud Homayouni Tabrizi Seyed Javad HoseiniThe aim of this study is to synthesize and investigate the anti-oxidant, anti-inflammatory and anti-bacterial effects of polylactic acid (PLGA) nanoparticles containing the extract of Anbernesara smoke. For this purpose, Anbernesara smoke was extracted and encapsulated MoreThe aim of this study is to synthesize and investigate the anti-oxidant, anti-inflammatory and anti-bacterial effects of polylactic acid (PLGA) nanoparticles containing the extract of Anbernesara smoke. For this purpose, Anbernesara smoke was extracted and encapsulated by PLGA nanoparticles using the W1/O/W2 method and characterized by DLS, zeta potential, FESEM and FTIR electron microscope techniques. The antioxidant activity of the synthesized nanoparticles using ABTS and FRAP tests, as well as measuring the expression levels of the antioxidant genes catalase (CAT) and superoxide dismutase (SOD) and the expression of interleukin 6 (IL-6) and interleukin 10 (IL- 10) was also analyzed to determine the anti-inflammatory potential of nanoparticles by Real time PCR test. The antibacterial activity of the synthesized nanoparticles was evaluated on two bacterial strains Escherichia coli and Bacillus subtilis. The results showed the formation of spherical nanoparticles with an average size of 51.2 nm, dispersion index of 0.22, surface’s charge of -35.37 mV and encapsulation efficiency of 74%. The antioxidant properties of synthesized PLGA nanoparticles were confirmed by reducing Fe+3, inhibiting the formation of free radicals and increasing the expression level of CAT and SOD genes. The expression levels of IL-6 and IL-10 genes were also increased under the influence of PLGA nanoparticles loaded with the organic extract of Anbernesara smoke, indicating the anti-inflammatory properties of the proposed nanoparticles. PLGA nanoparticles loaded with the organic extract of Anbernesara smoke had an antibacterial effect on B. subtilis, but not on E. coli. The PLGA nanoparticles loaded with the organic extract of Anbernesara smoke have anti-oxidant, anti-inflammatory properties and can be considered as a combination with antibacterial potential. . Manuscript profile -
Open Access Article
448 - Anti-Angiogenic Effects of Synthesized Solid Lipid Nanoparticles Containing Foeniculum vulgare Essential Oil
Mohammad Sharifalhoseini Ali Es-haghi Gholamhasan Vaezi Hooman ShajieeAngiogenesis is a physiological process that involves the formation of new blood vessels, contributing to the development and progression of various diseases, including metastatic cancers, cardiovascular diseases, and inflammatory conditions. Vascular endothelial growth MoreAngiogenesis is a physiological process that involves the formation of new blood vessels, contributing to the development and progression of various diseases, including metastatic cancers, cardiovascular diseases, and inflammatory conditions. Vascular endothelial growth factor (VEGF) is one of the main regulators of tumor angiogenesis. Studies show that VEGF and its receptor (VEGF-R) are often upregulated in tumor tissues, and the overexpression of VEGF increases tumor growth and metastasis. This research aimedto synthesize solid-lipid nanoparticles containing Foeniculum vulgare essential oil and investigate its anti-angiogenic effects. For this purpose, the chick embryo chorioallantoic membrane (CAM) was used, and the expression of two important genes involved in the angiogenesis process, VEGF and VEGF-R was assessed using Real-Time PCR. The results showed a decrease in the growth rate of blood vessels in the CAM model, indicating the anti-angiogenic effects of the nanoparticles. Also, Real Time-PCR confirmed a decrease in the expression of the VEGF and VEGF-R genes. The results of this study showed that solid-lipid nanoparticles containing Foeniculum vulgare essential oil had anti-angiogenic properties and; therefore, can be useful agents for treating cancer. Manuscript profile -
Open Access Article
449 - Antioxidant Effects of 6-gingerol on Serum Levels of Liver Enzymes and Oxidative Stress-induced Markers with Gold Nanoparticles in Rat Liver Tissue
BibiFatemeh Fatemi Gholamhassan Vaezi Shahram Sharafi Raheleh RahbarianGold nanoparticles disturb the physiological processes of the liver tissue by affecting the body’s biological system. Given gingerol's antioxidant properties, researchers wanted to see how it affected the levels of liver enzymes and oxidative stress indices in the MoreGold nanoparticles disturb the physiological processes of the liver tissue by affecting the body’s biological system. Given gingerol's antioxidant properties, researchers wanted to see how it affected the levels of liver enzymes and oxidative stress indices in the liver tissue of rats exposed to gold nanoparticles.This experimental research was conducted on 32 male Wistar rats, divided into four equal groups of control, gold nanoparticle (one administration of 0.5 ml gold nanoparticle, 200 ppm and 60 nanometers), gold nanoparticles + 50 mg/kg concentration of gingerol, and gold nanoparticles + 100 mg/kg gingerol. At the end of treatment period, the serum level of ALT, AST, GGT, ALP, and level of antioxidant enzymes of SOD < GST, and CAT, and levels of MDA and HOdG-8 in the liver tissue were measured using the ELISA method. In this study, rats receiving gold nanoparticles with concentrations of 50 and 100 mg/kg gingerol had significantly higher levels of SOD, GST, and CAT enzymes in their liver tissue than the dose-dependent group receiving gold nanoparticles. The serum levels of ALT, AST, GGT, and ALP, on the other hand, were reduced. Furthermore, the levels of MDA and HOdG-8 in rat liver tissue were found to be significantly lower (P <0.001).According to the results of study, gingerol improved the oxidative stress indices in liver tissue and decreased the serum level of liver enzymes. Therefore, this compound can be exploited to reduce DNA oxidative stress and lipid peroxidation in liver tissue. Manuscript profile -
Open Access Article
450 - The Effect of ZnO Nanoparticles Functionalized with Glutamic Acid and Conjugated with Thiosemicarbazide on the Expression of Bax, caspase-3, and bcl-2 Genes in Adenocarcinoma Gastric (AGS) Cell Line
Sadaf Beigi Ali Salehzadeh Hadi Habibbollahi Seyed Ataollah Sadat Shandiz Fariba SafaConjugation of metal nanoparticles (NPs) to thiosemicarbazide improves their stability and anticancer potential. This work was aimed at preparing ZnO NPs functionalized with glutamic acid conjugated to thiosemicarbazide (Zn@Glu/TSC). Then, the anticancer potential of na MoreConjugation of metal nanoparticles (NPs) to thiosemicarbazide improves their stability and anticancer potential. This work was aimed at preparing ZnO NPs functionalized with glutamic acid conjugated to thiosemicarbazide (Zn@Glu/TSC). Then, the anticancer potential of nanoparticles was studied by evaluating their cytotoxicity and the expression of the genes involved in cell apoptosis in AGS cancer cells. Physicochemical properties of the NPs were characterized using FT-IR, SEM, and TEM imaging, and Zeta potential assays. Cytotoxicity and inhibitory concentration 50% value of the NPs was determined using the MTT assay. Moreover, the expression of the caspase-3, bax, and bcl-2 genes among NPs treated AGS cells was investigated using Real-time PCR assay. According to the results, the NPs were spherical with a size range of 10-90 nm. FT-IR assay confirmed the proper synthesis of the NPs and the zeta potential was determined -11.7 mV. The synthesized NPs showed significant cytotoxicity at concentrations ≥ 15.62 µg/mL and 50% inhibitory concentration was determined 90µg/mL. Besides, the expression of caspase-3 and bax genes in NPs treated cells increased by 1.67 and 1.80 folds, respectively, while the bcl-2 gene was regulated by 0.70 folds, compared to the control cells. Manuscript profile -
Open Access Article
451 - The Effect of Cobalt-oxide Nanoparticles Conjugated with Glutamic Acid and Thiosemicarbazone on Apoptosis of Hepatocellular Carcinoma Cancer Cells
Asal Shahrokhshahi Ali Salehzadeh Hamidreza Vaziri Zeinab Moradi ShoeiliCancer is the second most common cause of death after cardiovascular disease. The present study was aimed at assessing the cobalt oxide nanoparticles conjugated with thiosemicarbazone (CO3O4-TSC) against hepatic cancer cells HepG2 in vitro. The CO3O4-TSC nanoparticles w MoreCancer is the second most common cause of death after cardiovascular disease. The present study was aimed at assessing the cobalt oxide nanoparticles conjugated with thiosemicarbazone (CO3O4-TSC) against hepatic cancer cells HepG2 in vitro. The CO3O4-TSC nanoparticles were synthesized by chemical and condensation methods. The effect of different concentrations of nanoparticles on the growth of Hek392 normal and HepG2 cancerous cells was assessed by MTT assay. The effect of CO3O4-TSC nanoparticles on apoptosis was assessed by measuring apoptotic Bax and anti-apoptotic Bcl2 genes using specific primers with the Real-Time PCR method. Mean expression of Bax gene in nanoparticle-treated cancer cells (2.19 ± 0.091) was significantly higher than normal cells (1.0 ± 0.027) and untreated cancer cells (0.84 ± 0.047) (p <0.001). The mean expression of Bcl2 gene was significantly lower in nanoparticle-treated cancer cells (0.65 ± 0.033) than in normal (1.0 ± 0.017) and untreated cancer cells (1.38 ± 0.033) (p <0.001). The expression ratio of Bax/Bcl2 in nanoparticle-treated cancer cells (3.36) was significantly higher than normal (1.0) and untreated cancer cells (0.61) (p <0.001). CO3O4-TSC nanoparticle has a high cytotoxic effect on cancer cells, possibly mediated by the induction of apoptotic Bax expression and decreased expression of anti-apoptotic Bcl2 gene. Manuscript profile -
Open Access Article
452 - Design, Synthesis, Characterization and Biological Evaluation of Iron Oxide Magnetic Nanoparticles Coated with Chitosan/Alginate Polymer
Elham Rostami Elham HovaziIn recent years, the use of nanoparticles in diagnosis, drug delivery and treatment has received much attention due to the small size of these particles and the increase in the surface-to-volume ratio. The most important problem when treating cancer with chemotherapy is MoreIn recent years, the use of nanoparticles in diagnosis, drug delivery and treatment has received much attention due to the small size of these particles and the increase in the surface-to-volume ratio. The most important problem when treating cancer with chemotherapy is the lack of access to the central parts of the mass due to its less blood supply. The purpose of this research was to investigate the toxicity of iron oxide nanoparticles coated with chitosan/alginate biopolymer on melanoma cancer cells of Hep G2 cells. In this research, magnetic iron nanoparticles were coated with two biopolymers, chitosan and alginate. The size and morphology of the surface of these nanoparticles were checked by size measuring device and scanning electron microscope, also the binding of functional groups of chitosan and alginate to magnetic iron nanoparticles was checked by infrared spectrometer. It was treated using magnetic iron nanoparticles and modified nanoparticles for 24 hours and the IC50 concentration of the compounds was estimated. The toxic properties of these nanoparticles were evaluated by MTT test and acridine orange/ethidium bromide staining. Examining the photos of the scanning electron microscope and the size measuring device showed a size of 50 nm for the modified iron nanoparticles. The shape of these nanoparticles was observed to be completely round and spherical. Biological investigations of nanoparticles definitely confirmed the effective coating of nanoparticles by chitosan and alginate biopolymers. According to the findings, magnetic iron nanoparticles had higher toxic effects depending on the concentration and their IC50 concentration was about 134 μM/ml, while the coated nanoparticles had significantly lower toxic effects and at concentrations below 25 μM/ml, they had no significant toxicity on Hep G2 cells. . Manuscript profile -
Open Access Article
453 - An Overview of Application of Diferent Nanoparticles in the Treatment of Various Types of Cancer and Investigation of their Cytotoxicity
Elham RostamiChitosan, made of deacetylated of chitin and the amino polysaccharide, is one of the greatest convenient biopolymers, which has large possibilities to be modified for new features of nano-medicine and being used in biomedical fields. Having responsibility of various fea MoreChitosan, made of deacetylated of chitin and the amino polysaccharide, is one of the greatest convenient biopolymers, which has large possibilities to be modified for new features of nano-medicine and being used in biomedical fields. Having responsibility of various features such as cationic nature and controlled drug release, are to the primary amine functional groups in chitosan. There are great properties, such as biocompatibility, biodegradability, loading capacity and an efficient way to avoid undesirable reactions, since the toxicity and side effects of systemic administration are reduced by adjusting Chitosan NPs, they are commonly synthesized as drug carriers. Achieving targeted delivery of drug is due to using peptides, antibodies, aptamer or small molecules. Mentioned methods lower using dosage of adequate drugs. Additionally, they lead the drugs to the targets. Also, the cytotoxicity studies of various nanoparticles and their pharmacokinetic studies have been carried out. The purpose of this review article is to show the importance of the characteristics of antibody-bound, magnetic, pH-sensitive conjugated chitosan nanoparticles in targeted drug delivery and to investigate the effect of these nanoparticles on different types of cancer cells. Manuscript profile -
Open Access Article
454 - Effect of Different Doses of the Copper Nanoparticles on the Lung Tissue of the Male Wistar Rats
Ramezani N. N. A. Shiravi V. HojatiNanoparticles are important in many aspects of human health applications. Given the lack of detailed documentation about the toxicity of silver nanoparticles, this study was conducted to investigate the effects of silver nanoparticles on lung tissue changes. In this stu MoreNanoparticles are important in many aspects of human health applications. Given the lack of detailed documentation about the toxicity of silver nanoparticles, this study was conducted to investigate the effects of silver nanoparticles on lung tissue changes. In this study, 30 Wistar rats were divided into three groups of 10, control, experimental 1 and experimental 2, were studied. For the control group distilled water, for experimental group 1 to 20-nanometer particles at a concentration of 500 mg per kg and for experimental groups of 2 to 20 nm nanoparticles with a concentration of 1000 mg/kg was used by inhalation for 10 d were investigated. After 10 d, mice were sacrificed and their lung tissues were isolated and dissolved in acid. Silver deposits in lung tissues were measured using atomic absorption spectrophotometry. Statistical analysis showed that silver nanoparticles in lung tissues at doses of 500 and 1000 mg/kg, in comparison with the control group had significant changes and effects on lung tissues. Changes indicated the cell and tissue damages, respectively. Lung as one of the important organs in the body respiratory system can be a place deposition of silver nanoparticles. Manuscript profile -
Open Access Article
455 - Effect of Subacute Toxicity Nano Zinc Oxide (ZnO NPs) on Oxidative Stress Enzymes of Roach (Rutilus rutilus caspicus)
K. Karimzadeh A. Zahmatkesh E. SharifiToday, the excessive use of zinc oxide nanoparticles (ZnO NPs) has led to concerns about the potential environmental hazards caused by the presence of these particles in aquatic ecosystems. Therefore, the aim of this study was to investigate the toxic effects of zinc ox MoreToday, the excessive use of zinc oxide nanoparticles (ZnO NPs) has led to concerns about the potential environmental hazards caused by the presence of these particles in aquatic ecosystems. Therefore, the aim of this study was to investigate the toxic effects of zinc oxide nanoparticles (0.02, 0.05 and 0.1 mg/L) on the oxidative stress enzymes in brain tissue of roach during a period of 7 days. After homogenization of the brain tissue, the activity of oxidative stress enzymes such as superoxide dismutase (SOD), glutathione-S transferase (GST), catalase (CAT), glutathione (GSH) and malondialdehyde (MDA) was determined using biochemical methods. The SOD, CAT and GST activities were significantly increased by exposure to 0.1 mg/ml zinc nanoparticles compared with other concentrations in brain tissue of roach (P<0.05). However, the amount of glutathione decreased with increasing exposure dose. In amount of malondialdehyde dose-dependent manner was observed, since the maximum concentration was recorded at 0.1 mg/ml of nanoparticles (4.5 ± 5.3 nmol/g wet). The subacute toxicity of nanoparticles leads to the induction of free radical and oxidative stress in brain tissue of roach. The increase in the activity of antioxidant enzymes causes antioxidant defense system activation for scavenger in free radicals. Manuscript profile -
Open Access Article
456 - Compare the Toxicity of Silver Nanoparticles Produced by Biological and Chemical Methods on Artemia franciscana in Naupliar and Adult Stages
S. Mashjoor M. Alishahi Z. Tulaby DezfulyIn this study, the toxicity of silver nanoparticles (AgNPs) and the difference in sensitivities in naupliar and adult stages of Artemia fransiscana, were evaluated to absorption of chemical and biosynthesized by the seaweed Ulva flexuosa, forms of AgNPs. The A. nauplii MoreIn this study, the toxicity of silver nanoparticles (AgNPs) and the difference in sensitivities in naupliar and adult stages of Artemia fransiscana, were evaluated to absorption of chemical and biosynthesized by the seaweed Ulva flexuosa, forms of AgNPs. The A. nauplii and adult were exposed to additive serial concentration of biosynthetic and chemical AgNPs. Mortality in each group at the times of 12, 24, 36 and 48 h after exposure to AgNPs were recorded and analyzed via Probit software. The toxicity of these two types of AgNPs on A. nauplii and adult increased in a dose-dependent manner, but also their toxicity increased along with duration of exposure time. The toxicity of nanoparticles were significantly different (P<0.05). Therefore, after 48 h, the LC50 value of chemical AgNPs in the A. nauplii was 31.8 mg/l, while 48 h LC50 for biosynthesis AgNPs was 366.96 mg/l. While the concentration of the chemical AgNPs have assessed in adults artemia during exposure was 47 mg/l and for biosynthesis form of AgNPs was 240 mg/l. The chemical form of AgNPs was more toxic potential than a biosynthetic form of its. The sensitivity of A. nauplii to chemical AgNPs was more than to mature stage, but compared to biosynthesis form was less than adult. This research could be pioneer to the development of biocompatible functionality of nanoparticles with eco-management objectives. Manuscript profile -
Open Access Article
457 - Effects of Silver Nanoparticles on Oxidative Stress in Adult Female Wistar Rats
N. Nowrozi E. Samani Jahromi S. Zolghadri JahromiWe aimed to evaluate the antioxidant effect of silver nanoparticles on oxidative stress in adult female of Wistar rats. In this experimental study, 50 adult female of Wistar rats were randomly divided into 5 groups. The control group (no treatment), sham group (0.2 mg/k MoreWe aimed to evaluate the antioxidant effect of silver nanoparticles on oxidative stress in adult female of Wistar rats. In this experimental study, 50 adult female of Wistar rats were randomly divided into 5 groups. The control group (no treatment), sham group (0.2 mg/kg physiology serum), experimental group 1 (50 mg/kg isoniazid), experimental group 2 (50 mg/kg isoniazid and 0.25 mg/kg silver nanoparticles) and the experimental group 3 (50 mg/kg isoniazid and 0.5 mg/kg silver nanoparticles) were given. All injections were prescribed for 15 d and isoniazid and silver nanoparticles were injected in gavage and intraperitoneally, respectively. Then all animals were anesthetized and blooded. In the end, the data were examined by ANOVA test at a significance level of P<0.05 using SPSS software. Isoniazid increases nitric oxide, reduces glutathione peroxidase activity and total antioxidant capacity. While treating the animals with silver nanoparticles reduced the side effects of oxidant-induced by isoniazid, with decreasing nitric oxide, increased glutathione peroxidase and total antioxidant capacity by reducing nitric oxide production and increasing glutathione peroxidase activity oxidative, silver nanoparticle prevent from oxidative damages and the destruction of red blood cell (RBC) membrane. In other words, the tests showed the antioxidant role of silver nanoparticles as well. Manuscript profile -
Open Access Article
458 - A new approach using Machine Learning and Deep Learning for the prediction of cancer tumor
Fatemeh Asgari Arian Minooei Somayeh Abdolahi Reza Shokrani Foroushani Atefeh Ghorbani -
Open Access Article
459 - بررسی عددی فرآیند ذوب ترکیبات حاوی نانو ذرات برای توسعه روند تغییر فاز
نادر پورمحمود ناصر مصطفوی نیا امیر حسن زادهدر کار ارائه شده، فرآیند ذوب ترکیبات حاوی نانو ذرات (NePCM) در یک حفرهمربعی تحت زوایای مختلف در اثر اعمال دو جفت منبع حرارتی چاه-چشمه بر روی دیواره های افقی، بصورت عددی مورد بررسی قرار گرفته است. برای بررسی اثر تغییر در موقعیت المان­های چاه-چشمه روی دیوارهای افقی بر Moreدر کار ارائه شده، فرآیند ذوب ترکیبات حاوی نانو ذرات (NePCM) در یک حفرهمربعی تحت زوایای مختلف در اثر اعمال دو جفت منبع حرارتی چاه-چشمه بر روی دیواره های افقی، بصورت عددی مورد بررسی قرار گرفته است. برای بررسی اثر تغییر در موقعیت المان­های چاه-چشمه روی دیوارهای افقی بر نسبت کسری مابع، چهار چیدمان مختلف از المانهای مذکور بکار گرفته شده است. در مورد اول، چشمه ها و چاه ها به طور جداگانه روی دیوارهای افقی قرارگرفته اند. شرایط محیطی در مورد دوم بدین صورت است که المان­های چشمه و چاه، بطور متناوب روی دیوارهای افقی چیده شده­ اند.در چیدمان سوم، چشمه­ها در سمت چپ المان­های چاه قرار گرفته و نهایتا در مورد شکل چهارم ، عناصر چشمه و چاه همه در پایین دیوار­های افقی قرار می گیرند. نتایج نشان می­دهد که در چیدمان اول با استفاده از 2 درصد وزنی نانو ذرات Al2O3، در مقایسه با بقیه موارد، بیشترین نسبت کسری مایع بدست می­آید. Manuscript profile -
Open Access Article
460 - Review of Micro-Particles of Hydroxyapatite Nanoparticles by Ball Milling
F. Fardi Pour M. Najafi Anaraki M. Karmian -
Open Access Article
461 - Survey of silver nanoparticles (Ag-NPs) effects on blood indices of Rainbow trout (Oncorhynchus mykiss) juveniles
Mina Tavassoli Rudsari Hamidreza Jamalzadeh Elmira Mikaeili Agah -
Open Access Article
462 - Effects of Fe2o3 and Co2o3 nanoparticles on Organisms in Freshwater
Leila Farsi Mojgan Khodadadi Sima Sabzalipour Nemaat Jaafarzadeh Haghighi Fard Farid Jamali-Sheini -
Open Access Article
463 - Organic compound removal from textile wastewater by photocatalytic and sonocatalytic processes in the presence of copper oxide nanoparticles
Reza Fekri Seyed-Ahmad Mirbagheri ebrahim fataei Gholamreza Ebrahimzadeh-Rajaei Lobat Taghavi -
Open Access Article
464 - Antibacterial effect of Curcumin encapsulated in polymersome nanoparticles on the expression of efflux pump MDR1 gene in fluconazole resistant isolates of Candida albicans
ُSahar Pourasgar Aida Bejari Mahkameh Hedayatsafa Mahdi Shahriarinour Najmeh RanjiCurcumin, a natural product of turmeric, is known for its antibacterial and antifungal properties. Candida albicans is a major fungal pathogen with high mortality rate, particularly in immunocompromised patients. This study aimed to evaluate the effect of curcumin encap MoreCurcumin, a natural product of turmeric, is known for its antibacterial and antifungal properties. Candida albicans is a major fungal pathogen with high mortality rate, particularly in immunocompromised patients. This study aimed to evaluate the effect of curcumin encapsulated in nanoparticles (polymersomes) in combination with fluconazole on the expression of the MDRI gene in drug-resistant isolates of C. albicans. This descriptive cross-sectional study involved obtaining 50 clinical samples, from women with vulvovaginal infections at Al-Zahra hospital (Rasht, Iran). After identifying the strains, resistance to fluconazole was assessed using disc diffusion and broth dilution methods. Six fluconazole-resistant isolates of C. albicans were treated with ½ MIC fluconazole (control) alone and in combination with curcumin encapsulated in nanoparticles. After 24 hours, the two cell groups were cultured on Sabouraud dextrose agar (SDA) to estimate the cell death rate. The expression of the MDR1 gene was quantitatively investigated using the qRT-PCR method in treated and untreated isolates. Our finding indicated that combined therapy with ½ MIC fluconazole and curcumin encapsulated in nanoparticles (at a concentration of 400µg/ml) reduced fungal growth by up to 50% within during 24 hours. In treated cells, qRT-PCR analysis revealed a decrease in MDR1 gene expression compared to untreated cells. Curcumin appears to enhance the effectiveness of fluconazole in fluconazole-resistant isolates by reducing MDR1 gene expression. Manuscript profile -
Open Access Article
465 - The Effect of Green Synthesis of Chitosan with Oat Extract on the Germination of Pigweed (Amaranthus retroflexus)
Ali ebadi فاطمه احدنیاOats (Avena sativa L.) possess allelopathic properties and can serve as effective cover crops to inhibit weed growth. This study aimed to investigate the effect of the aqueous extract and formulated extract of oats with chitosan nanoparticles on the germination of red r MoreOats (Avena sativa L.) possess allelopathic properties and can serve as effective cover crops to inhibit weed growth. This study aimed to investigate the effect of the aqueous extract and formulated extract of oats with chitosan nanoparticles on the germination of red root pigweed (Amaranthus retroflexus) in the year 2021. The experiment was designed using a factorial based on a completely randomized design, with three repetitions. The experimental treatments included the type of extract (aqueous extract of oats and formulated extract of oats with chitosan nanoparticles) and six control concentrations (distilled water and chitosan without plant extract), 10, 50, 100, 150, and 200 g/L. The results of the study demonstrated that the interaction between the type of extract and different concentrations significantly affected the evaluated traits at the probability level of 1%. The percentage of germination in the aqueous extract of oats and its formulated extract with chitosan nanoparticles in concentrations of 100, 150, and 200 were zero, 16.66, 15.33, and 5.33%, respectively. Also, increasing the concentration of the extract formulated with chitosan caused a decrease in germination rate (85.46, 87.95, and 96.10%), mean daily germination percentage (82.75, 84.20, and 94.49%), seedling vigor index (85.53, 87.60 and 97.71%) and synchronization index (45.76, 47.90 and 14.75%) of the red root pigweed compared to chitosan without plant extract. These findings suggest that of the aqueous extract of oats had a greater inhibition on the germination the red root pigweed weed. Manuscript profile -
Open Access Article
466 - A Simple Polymer-based Co-Precipitation Method for Tuning Magnetic Properties of Cobalt-Doped Nickel Ferrite Nanoparticles
Sharareh MirzaeeIon distribution on the spinel structure of ferrite nanoparticles is one of the critical factors that can affect magnetic properties. Therefore, if a method changes ion distribution, it can be used for fabrication (synthesis) of nanoparticles with different magnetic p MoreIon distribution on the spinel structure of ferrite nanoparticles is one of the critical factors that can affect magnetic properties. Therefore, if a method changes ion distribution, it can be used for fabrication (synthesis) of nanoparticles with different magnetic properties that apply in the diverse of technology field. In this work, the dependence of magnetic characteristics of the cobalt-doped nickel ferrite nanoparticles on Polyvinyl alcohol (PVA) assisted co-precipitation processes was studied. The structural and magnetic measurements were made employing XRD and VSM. Nanoparticles with a cubic spinel structure and an average size of about 29 nm have been synthesized, and their structure was confirmed using the XRD pattern and Sherrer’s equation. According to the obtained hysteresis loops of the five sets of synthesized nanoparticles, the coercive field and magnetization are different because of the interaction between polymer and metal ions in the reaction medium that causes a kind of ion immobilization and different ion distribution over the spinel structure. Such polymer-based synthesis procedures can be used to fabricate of magnetic nanoparticles with tunable magnetic properties. Manuscript profile -
Open Access Article
467 - Biosynthesis of Silver Nanoparticles using Bacillus subtilis Bacterium Cultured in Corn Steep Liquor and Evaluation of its Antibacterial Activity
Naeimeh Faridi Aghdam Shahram Moradi Dehaghi Sirous Ebrahimi Hamed HamshehkarIn this study, the biosynthesis of silver nanoparticles was done using Bacillus subtilis bacterium cultured in corn steep liquor (CSL) nutrient. The biosynthesized nanoparticles were characterized by several techniques including FT-IR, XRD, UV-Vis, SEM, EDX, and TEM. MoreIn this study, the biosynthesis of silver nanoparticles was done using Bacillus subtilis bacterium cultured in corn steep liquor (CSL) nutrient. The biosynthesized nanoparticles were characterized by several techniques including FT-IR, XRD, UV-Vis, SEM, EDX, and TEM. The absorption spectrum of the nanoparticles indicated the maximum absorption at 436 nm. The SEM image confirmed the nanoparticles had polydisperse spherical morphology (~20nm). Also, the TEM image showed the nanoparticles had spherical or elliptical shape and the approximate diameter of the particles was between 10-20 nm. Morphological studies showed that the nanoparticles were completely separated and no aggregation was observed. Moreover, XRD studies confirmed that the produced nanoparticles were crystallized in the FCC crystal lattice. The antibacterial activity results indicated that the synthesized nanoparticles had significant effect against Escherichia coli bacteria, and the inhibition zone was equal to Gentamicin. So, the production of silver nanoparticles using green method is economically very economical, and can be a method for the production of silver nanoparticles in industrial scale. Manuscript profile -
Open Access Article
468 - Synthesis of SiO2 Nano particles-Dimethyl Malonate Polymer
banafsheh gorji allahgholi ghasri allahgholi ghasriThe goal of this research is synthesis of hybrid inorganic-organic microstructure to form a monolayer with anti-reflective properties. Dimethyl Malonate –Silica gel (DMM-SiO2) composite were synthesized by chemical method from dimethyl malonate (DMM) and silica gel p MoreThe goal of this research is synthesis of hybrid inorganic-organic microstructure to form a monolayer with anti-reflective properties. Dimethyl Malonate –Silica gel (DMM-SiO2) composite were synthesized by chemical method from dimethyl malonate (DMM) and silica gel particles with a diameter ~34 nm. The anionic polymerization was applied for the preparation of composite. DMM as monomer polymerizes upon reacting with an initiator (OHin H2O) and terminate by a terminator (H+ in HCl). We modify the anionic polymerization reaction by adding silica gel nanoparticles before initiating polymerization. Variables including SiO2 concentration, surfactant concentration, DMM/SiO2 ratio, and pH of solution have been investigated. The optimal synthesis conditions were obtained by Box-Behnken design (BBD). The results show that reaction should be carried out at ambient temperature and pH 4.5. Sodium dodecyl sulfate (SDS) as surfactant concentration, SiO2 concentration and DMM/SiO2 ratio should be 5 mmol, 2 w.t% and 4.2g/1g, respectively. DMM-SiO2 composite were characterized by Scanning Electron Microscopy (SEM), and Thermogravimetry Analysis (TGA). Manuscript profile -
Open Access Article
469 - Preconcentration and Determination of Theophylline in Water Samples using Magnetic Nano-Cellulose with Dispersive Solid Phase Extraction
Parastoo Molaei ali moghimi Shahin Ahmadi seyedali sobhanianTheophylline (1,3-dimethyl-2,3,6,7-tetrahydro-1-hydrogen-purine-6,2-dione) is a bronchodilator drug used in the treatment of asthma and chronic obstructive pulmonary disease (COPD). Due to the narrow therapeutic strip of this drug, it is important to measure its blood l MoreTheophylline (1,3-dimethyl-2,3,6,7-tetrahydro-1-hydrogen-purine-6,2-dione) is a bronchodilator drug used in the treatment of asthma and chronic obstructive pulmonary disease (COPD). Due to the narrow therapeutic strip of this drug, it is important to measure its blood level.To achieve a simple, safe and sensitive method based on dispersive solid phase extraction (DSPE) using magnetite nanoparticles covered with nanocellulose and beta-cyclodextrin for preconcentration and measurement of theophylline in aqueous samples and its validation, this method was used. In this research, variables affecting the extraction such as pH, ionic strength, and amount of adsorbent, temperature, time, limit volume and type of solvent were optimized. After extraction, the adsorbent was easily separated from the aqueous sample using an external magnetic field without filtration or centrifugation. The results showed that optimum conditions were obtained with pH=5, 1 mg of sodium chloride, 0.2 g of adsorbent with a capacity of 0.53 mg/g, temperature of 40 degrees Celsius, 20 minutes of contact between the adsorbent and the sample and 5 mL of methanol as the desorption solvent. In optimal conditions, the suitable concentration factor is 12, low detection limit (0.17 mg/L), wide linear range and in accordance with the therapeutic strip of the drug (5-50 mg/L), good correlation coefficient (R2=0.9991) and good accuracy (RSD=1.03%) was obtained.Urine sample was used to validate the above method. Also, it was found that the proposed method is suitable, efficient and usable for measuring of theophylline. Manuscript profile
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