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Open Access Article
1 - Platinium-Ruthenium electrocatalyst as sensor electrode for methanol oxidation
Mohammad Yari Sajjad Sedaghat -
Open Access Article
2 - Kinetic modeling on photo oxidative degradation of C.I acid yellow 23 by UV/H_2 O_2 process
N. Modirshahla M.A. Behnaiady Z. Gazi Tabatabaie -
Open Access Article
3 - 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
4 - Study of Photooxidative Degradation of Reactive Dyes from Aqueous Solutions by UV/ C102 Process
S. Hashemian K. Zare -
Open Access Article
5 - Theoretical thermodynamic study of CO and O2 Adsorption on Au14 Nano Cluster
Somayyeh Ghasemlou H. Aghaie -
Open Access Article
6 - Investigating the Possibility of Increasing the Stability of Pan Releasing Oil
M. Ghoraba B. Ghiassi Tarzi M. GhavamiIntroduction: This research work is concerned to identify and present the optimal formulation for maximum stability time of pan releasing oil. Non separation of food products particularly bakery ones from the pan will reduce the quality of the product and causes some wa MoreIntroduction: This research work is concerned to identify and present the optimal formulation for maximum stability time of pan releasing oil. Non separation of food products particularly bakery ones from the pan will reduce the quality of the product and causes some wastes. This study was designed to optimize the possibility of increasing the shelf life of releasing pan oils by using sunflower seed and canola oils.Materials and Methods: In order to formulate the pan releasing oil by Design Expert, sunflower seed andcanola oils with three different kinds of antioxidant (TBHQ, BHA, BHT) at different concentrations (100 ppm to 200 ppm) were prepared. Percent free fatty acid, acid value, peroxide value, induction period and fatty acid profile and composition were determined according to the national standard. The optimum concentration of the antioxidant concerned with pan releasing oil was obtained at 35° C for 90 days. Results: The result of this study indicated that the best result concerned with above factors was sunflower seed oil with 155 ppm tert-Butylhydroquinone concentration. Therefore, sunflower seed oil with added TBHQ as antioxidant might be used as a new and healthy pan releasing oil. Conclusion: Sunflower seed oil containing TBHQ might be introduced as a stable, healthy pan releasing oil. Conclusion: Sunflower seed oil containing TBHQ might be introduced as a stable, healthy pan releasing oil. Manuscript profile -
Open Access Article
7 - Evaluation of the Antioxidant and Chelating Activities of Cinnamon Extract
Leila Kamali Roosta Mehrdad Ghavami Amir Hossein Elhami Rad Reza AzizinezhadIntroduction: Spices in addition to their flavor contribution are important sources of natural antioxidants. Therefore, due to the possible undesirable effects of synthetic antioxidants, the natural antioxidants that are present in fruits and vegetables and have been co MoreIntroduction: Spices in addition to their flavor contribution are important sources of natural antioxidants. Therefore, due to the possible undesirable effects of synthetic antioxidants, the natural antioxidants that are present in fruits and vegetables and have been consumed by man for years are preferred. In this project the antioxidant activity of cinnamon extract a popular spice used as a flavoring agent is evaluated.Materials and Methods: Acetone and methanolic extracts of cinnamon were obtained by the application of cold solvent method. Extraction efficiency was determined and total content of phenolic compounds were measured using Folin Ciocalteau method. Different concentrations of extracts at 0.02%, 0.04%, 0.06%, 0.08% & 0.1% were added to tallow a substrate free of natural antioxidant and the stabilities of the samples were determined. Peroxide value and induction period measurements were used as means to evaluate the antioxidant activities. The results were compared with a synthetic antioxidant; TBHQ at 0.01% concentration. The best concentration of extracts having antioxidant activity (0.1% concentration), was examined forchelation of copper metal in tallow as the substrate.Results: Extraction efficiency of cinnamon extract using methanol was higher than acetone, but the amount of phenolic compounds was higher when acetone was employed. The evaluation of the antioxidant activity of the extracts on tallow indicated that the activity was concentration dependent and the activity was increased as higher concentrations of the extracts were applied. The acetone extract at 0.1% concentration showed the highest activity after the synthetic antioxidant, TBHQ at 0.01% concentration. The addition of Cu in the formof its copper salt to tallow in combination with the extracts at 0.1% concentration indicated that these compounds might be regarded as chelating agents and the extract obtained by acetone was more effective in term of chelating property.Conclusion: Cinnamon extract in addition to the antioxidant activity, has chelating property on copper, and might be employed as a source of natural antioxidant and metal chelating agents. Manuscript profile -
Open Access Article
8 - The Effects of Type of Vacuum Packaging and Additives on the Oxidative Stability of Skinless Frozen Rainbow Trout Fillet (Oncorhynchus mykiss)
A. Ansari Ardeli B. Shabanpour M. Kordjazi S.M. Ojagh A. Babakhani LashkanIntroduction: Researchers are always looking for ways to maintain the food quality. In this study the effects of two types of packing (Conventional and Vacuum) and additives that contain oregano extract and sodium tripolyphosphate (2%) individually and in combination, w MoreIntroduction: Researchers are always looking for ways to maintain the food quality. In this study the effects of two types of packing (Conventional and Vacuum) and additives that contain oregano extract and sodium tripolyphosphate (2%) individually and in combination, were investigated on the quality of rainbow trout fillets without skin during 6 months of storage at -18 ° C. Materials and Methods: This survey consisted of five treatments. Sampling were performed at 0 and 1, 2, 3, 4, 5 and 6 months to determine some chemical (thiobarbituric acid, free fatty acid and water holding capacity), sensory and tissue analyses. Results: Chemical examination of the samples indicated that conventional packing containing sodium tripolyphosphate and additive mixture with oregano had better performance in reducing thiobarbituric acid as well as good effect concerned with vacuum packing in respect of free fatty acids reduction as compared to the control. Dripping in tripolyphosphate treatment was lower than additive mixture. Treatment concerned with sodium tripolyphosphate indicated better results regarding sensory characteristics as compared to the treatment with added oregano extract and control. Conclusion: The application of polyphosphate as an additive in vacuum packaging might be regarded as an effective method to maintain the quality of rainbow trout fillets stored at -18°C for 6 months. Manuscript profile -
Open Access Article
9 - Evaluation of Physicochemical Properties and Oxidative Stability of Nano-Capsules in Different Storage Conditions
Sh. Ahmadi S. M. Ojagh Sh. HasaniIntroduction: the health benefits of omega-3 fatty acids, as well as the high sensitivity ofunsaturated fatty acids to oxidation of fish oil, caused the use of encapsulation of fish oil forenriching food products and drugs.Materials and Methods: this study aims to evalu MoreIntroduction: the health benefits of omega-3 fatty acids, as well as the high sensitivity ofunsaturated fatty acids to oxidation of fish oil, caused the use of encapsulation of fish oil forenriching food products and drugs.Materials and Methods: this study aims to evaluate the physicochemical properties of nanoencapsulatedfish oil, and their oxidative stability during storage at 0 and 24% relativehumidity conditions. Emulsion was prepared after sonication with wall materials ofmaltodextrin (M), modified starch (Hi-cap) and whey protein concentrate (WPC) at the ratioof 1:4 (oil:wall). Emulsion and nano-encapsulated powder properties including emulsionstability, apparent viscosity, powder moisture, encapsulated coefficient, particle size andmorphology of nano-capsules were determined.Results: The lowest amounts of creaming and viscosity were observed in M+Hi-cap+WPCand M, respectively. Moisture content in M+Hi-cap showed the highest value. The lowest andhighest particle sizes were measured in M+Hi-cap+WPC and M, respectively. Also, the bestencapsulation efficiency was obtained for M+Hi-cap+WPC. SEM photographs showed glasslikesheets of encapsulated materials with the freeze-dryer. During 21 days storage at 0 and24% relative humidity, the results showed an increase in peroxide and anisidine values. Thevalues were higher at 24% than the 0% humidity, and the best results of oxidative stabilitywere observed in M+Hi-cap+WPC treatment.Conclusion: Based on the findings, relative humidity is an effective factor in the oxidation offish oil nano-capsules. The use of nano-encapsulation is a practical and effective method forincreasing the stability of fish oil for enriching the food and promoting human health. Manuscript profile -
Open Access Article
10 - The Effect of Persian Gum Coating Containing Green Mint Extract and Ultraviolet Ray on the Duration of Fresh Pistachio (Pistacia Vera)
M. Moezi M. FazelIntroduction: Pistachio is one of the most popular nuts of the world due to its taste and nutritional value. The storage conditions of pistachios play an essential role in preserving the quality and organoleptic characteristics of the product, while unsatisfactory stora MoreIntroduction: Pistachio is one of the most popular nuts of the world due to its taste and nutritional value. The storage conditions of pistachios play an essential role in preserving the quality and organoleptic characteristics of the product, while unsatisfactory storage conditions, create undesirable reactions and provide poor products quality. Materials and Methods: This study was carried out to evaluate the effect of various ultraviolet rays (4, 8,12 Kj/m2), Persian gum (7% w/v), and mint extract(1.5% v/v) on oxidative reactions and microbial characteristics of pistachio kernels of Kaleghuchchi cultivar. After applying the treatments, pistachios were packed in polyethylene bags and kept at refrigerated temperature (4 ± 1 ℃) for two months. In the first, third, fifth and eighth weeks, phenolic compounds, acidity, peroxide value, thiobarbituric acid number and lossing weight were measured. On the first and last days of storage, the total microbial load and yeast mold were evaluated. Inorder to evaluate the effect of gum and extract of mint on the sensory properties on the last day, five-point gradient Hedonic test was carried out. Statistical analysis was performed using SPSS20 software in a completely randomized design with three replications in LSD test. Results: The result showed that by increasing the intensity of radiation, the microbial load decreased (p <0/05), because the radiation by the nucleoide acid causes the breakdown of the primidine nucleotides, but it increases the acidity, peroxide, and thiobarbituric acid because the radiation causes degradation due to its photocatalytic activity. Phenolic compounds andantioxidant activity is reduced. In the coating samples, especially gum and mint extract coating, the levels of microbial, acidity, peroxide, and tiobarbituric acid were reduced (p <0.05) due to the presence of antioxidant capacity. the sensory evaluation results indicated that there was no significant difference in terms of smell, tast and overall acceptancebetween thesamples. Conclusion: Using Persian gum coating with mint extract, the increases antimicrobial power and also reduces the negative effect of UV on fat oxidation. Manuscript profile -
Open Access Article
11 - Phytochemical Screening of the Aqueous Extracts of Iranian Onion (Allium cepa L.) Landraces
K. Keyghobadi M. Golabadi M. Khozaei A. Rezaei -
Open Access Article
12 - Investigation of spent caustic treatment processes in Bandar Abbas oil refinery
Roghaye Elmi Arezoo Nejaei Amir Farshi Mohammad Ebrahim Ramazani Ebrahim AlaieBackground and Objective: Release of wastewater from spent caustic of refinery without the application of treatment methods will have adverse environmental effects due to its high toxic compounds and high chemical oxygen demand (COD). In this study, two processes o MoreBackground and Objective: Release of wastewater from spent caustic of refinery without the application of treatment methods will have adverse environmental effects due to its high toxic compounds and high chemical oxygen demand (COD). In this study, two processes of wet air oxidation (WAO) and neutralization with sulfuric acid (DAN) were investigated and optimized for treatment of wastewater from spent caustic of the Bandar Abbas oil refinery in southern Iran.Material and Methodology: These processes were performed in the laboratory by a glass reactor and a 500 ml semi-continuous reactor for 18 months, from September 2019, respectively. Treatment process experiments involving two methods were performed on a number of important factors. Design Expert software was used to optimize the test results and Box- Benken (BBD) method was used to design the experiments.Findings: The results showed that the WAO process showed 43% reduction in COD. Temperature and pressure parameters had the greatest impact on the reduction of spent caustic COD. The DAN process reduced the COD by 68%. pH and temperature parameters had the most impact.Discussion and Conclusion: WAO has been a more environmentally friendly method, and the DAN process is recommended because of its popularity, ease of testing, lower equipment requirements, and lower cost. Manuscript profile -
Open Access Article
13 - Decolorination of Reactive Blue19 Dye in Dying Industries Wastewater by Electro-Fenton Process
Mohammad Malakootian Mehdi Asadi Amir hossein MahviBackground: Due to increase of water consumption and lack of resources, wastewater reuse, especially in the industries, as one of the methods for supplying water needs is considered. Dyeing industries are among the large consumers of water and the major problem of their MoreBackground: Due to increase of water consumption and lack of resources, wastewater reuse, especially in the industries, as one of the methods for supplying water needs is considered. Dyeing industries are among the large consumers of water and the major problem of their produced wastewater is that it contains color materials and it is non-biodegradable. The conventional methods for removing color from wastewater often lead to production of a large amount of sludge, posing the problems of sludge disposal and treatment. Electro-Fenton process is an advanced oxidation process which can decrease the pollutants organic and color concentrations effectivelly. Materials and methods: In this method, sampling of wastewater was done according to standard methods book for the examination of water and wastewater principles. Then the samples were transferred to the made electrochemical cell pilot, and the impact of various parameters including the amount of electric current, rate of consumption of iron ions, pH and electrolysis time on operating conditions of process was evaluated. Results: The results showed that under the optimal conditions as current intensity of 20 V for color concentration of 100 mg/L and current intensity of 30 V for color concentration of over 200 mg/L time range of45-60 min, iron ion oncentration of 0.3 mg/L and pH = 4, color removal of 100% can be achieved. Conclusion: Electro-Fenton process is capable of removing Reactive Blue19 dye with different concentrations and maximum efficiency. Based on the results obtained, it was found that the electric current intensity and iron ion concentration are the parameters affecting the Electro-Fenton process for the removal Reactive Blue19 dye, whereas electrolysis time and pH parameters were less effective on the efficiency of Electro-Fenton process for the removal of Reactive Blue19 dye Manuscript profile -
Open Access Article
14 - Comparison of the Efficiency of Fe3O4 Magnetite Nanoparticles and Zero-valent Iron Nanoparticles in the Advanced Oxidation Process Based on Diproxipersulfate in Sewage Treatment of Leather Industry
Seyed mohsen Beladi roya mafigholami Ali Hashemi zavarehBackground and Objective: Industrial wastewater treatment is more difficult than urban sewage due to the presence of various pollutants. Sewage produced in the leather industry should be treated to the environment due to having a pollution load and the presence of high MoreBackground and Objective: Industrial wastewater treatment is more difficult than urban sewage due to the presence of various pollutants. Sewage produced in the leather industry should be treated to the environment due to having a pollution load and the presence of high chloride ion before discharge. The advanced oxidation process based on dioxy persulfate is considered a new process in the presence of active agents. This process has a great capability in wastewater treatment with high pollution. In this study, the anion process of persulfate was used with the activation of magnetic iron (Fe3O4) and zero-valent iron at laboratory scale in order to treat and reduce the organic load (COD) waste water of leather industry. Material and Methodology: In this process, the effect of primary pH variables of wastewater (5-9), reaction time (0-60 minutes), Anion concentration of persulfate (50-200 mg per liter) and the amount of iron-containing nanoparticles (0.5-2 grams per liter) were investigated. Findings: The best conditions of the advanced oxidation process in the presence of zero-valent iron include pH 3، The amount of magnetic iron nanoparticles was equal to one gram per liter and the amount of dioxy persulfate was equal to 100 mg per liter. During the mentioned conditions, the efficiency of the process was achieved by 85 percent. The findings revealed that the initial COD (COD process reduced 3,700 milligrams per liter to below 1,000 milligrams per liter ¬COD final to 555 milligrams per liter. Discussion and Conclusion: Advanced oxidation process based on dioxy persulfate in the presence of iron compounds (zero-valent iron and magnetic iron) due to high performance (removal of 85 percent of primary COD and reduction to 555 milligrams per liter, can be used for decomposition and mineralization of pollutants, pollutants, water, especially industrial sewage. The effluent from this system can be drained into municipal wastewater treatment plants, so by reducing COD to 555 mg per liter, it still cannot be used alone. Manuscript profile -
Open Access Article
15 - Epoxidation of Alkenes and Oxidation of Alcohols with Hydrogen Peroxide Catalyzed by a Fe (Br8TPPS) Supported on Amberlite IRA-400
Shahla Masoudian Parvaneh Pakravan -
Open Access Article
16 - Selective and Validated SpectrophotometricMethods for Determination of Acyclovir and Ganciclovirwith 2, 4 as Reagent
T. Anil Kumar B. M. Gurupadayya M.B. Rahul Reddy M.V. PrudhviRaju -
Open Access Article
17 - Advanced Oxidation Process for Haloacetic Acid Removal in Tehranpars Water Treatment Using CuO Nanocatalyst
Seyedeh Niloofar Alavi Seyed Ali Jozi Kambiz Tahvildar Shahrzad Khoramnezhadian -
Open Access Article
18 - Removal of Direct Red Dye 23 from Water and Wastewater Using S2O8 Oxidant Activated by UV Irradiation:An Investigation on the Operational Parameters
Mohammad Hossein Rasoulifard Mohammad Hossein Alidoust -
Open Access Article
19 - Synthesis of Sulfoxides in Water by New Magnetic Nanoparticles Supported Tungstic Acid (MNP-TA), as a Selective Oxidation Method of Sulfides
MohammadJavad Taghizadeh Mehdi Didwar -
Open Access Article
20 - Decolorization of Cationic and Anionic Textile Blue Dyes from Aqueous Solution with Advanced Oxidation Process Using H2O2 and Various Catalysts
Fatemeh Jahedi Hamid Modarress Elham Keshmirizadeh -
Open Access Article
21 - Application of Ultraviolet Light-Emitting Diodes to the Removal of Cefixime Trihydrate from Aqueous Solution in the Presence of Peroxydisulfate
Mohammad Hossein Rasoulifard Leila Ghalamch Maryam Aziz Mohammad Reza Eskandarian Negar Sehati -
Open Access Article
22 - A Simple and an Effective Catalyst for Determination of Cefixime in Real Samples Using of Modified Carbon Paste Electrode with Cobalt Impregnated Zeolite
Samaneh Tajjedin Banafsheh Norouzi -
Open Access Article
23 - Electrocatalytic Determination of Anti-Cancer Drug Imatinib, Using Ni Nanoparticle Modified Carbon Paste Electrode
Fatemeh Khakpoor Shahla Fathi -
Open Access Article
24 - Electrocatalytic oxidation of formaldehyde on novel composite of nickel/triton-x100/poly(o-aminophenol-co-aniline)
Sepide Saeedi Kenari Shahla Fathi Fereshteh Chekin -
Open Access Article
25 - Magnetic NiFe2O4 Nanoparticles as an Efficient Catalyst for the Oxidation of Alcohols to Carbonyl Compounds in the Presence of Oxone as an Oxidant
Ali Ramazani Fariba Sadri Abdolhossain Massoudi Mehdi Khoobi Sang Woo Joo Leila Dolatyari Vahid Azizkhani -
Open Access Article
26 - Thermal Oxidation Times Effect on Structural and Morphological Properties of Molybdenum Oxide Thin Films Grown on Quartz Substrates
Alireza Hojabri Fatemeh Hajakbari Yalda Ghodrat -
Open Access Article
27 - Effect of Ta Addition on Microstructure and Hot Oxidation Resistance of AlCrCoNiY-xTa High-Entropy Alloy Consolidated by Spark Plasma Sintering
Babaei Rouchi A Salemi Golezani A Hadavi S. M. M -
Open Access Article
28 - The Influence of Oxidized Interlayer on the Adhesion of Bioactive Cao-P2o5-Tio2-Na2o Glass Ceramic Coating to the Titanium Substrate
Sh. Honarvar B. Eftekhari Yekta -
Open Access Article
29 - Preparation and Characterization of Molybdenum Trioxide Thin Films Grown by Two-Step Method: DC Sputtering and Plasma Oxidation
Nouri Z Hojabri A Hajakbari F -
Open Access Article
30 - Investigating the Research Conducted on Improving the Properties of Oxidation Resistance and Erosion of ZrB2/SiC Composites
K Kolahgar Azari A Alizadeh A Sayadi Kelemi -
Open Access Article
31 - Investigation of the TiO2/SiC/SiO2 Coating Effect On the Wear Rate of Needle Graphite Electrode by using Electrical Discharge Machining
Hossein Alian Moghadam majid jabbari Saeed Daneshmand Saeid Rasouli Jazi Arezoo Khosravi -
Open Access Article
32 - A review of the antioxidant compounds of plant sources in Iran
seyyed moein nazari mohammad malekiAntioxidants are compounds that delay oxidation in low concentrations. They are divided into two categories: natural and synthetic. The most used antioxidant groups in the food industry are synthetic phenolic antioxidants BHA, BHT, TBHQ and PG. These antioxidants are vo MoreAntioxidants are compounds that delay oxidation in low concentrations. They are divided into two categories: natural and synthetic. The most used antioxidant groups in the food industry are synthetic phenolic antioxidants BHA, BHT, TBHQ and PG. These antioxidants are volatile and sensitive to heat and are not favorable for food stability, on the other hand, their use threatens human health. For this reason, today scientists and researchers are trying to find natural compounds with antioxidant properties to replace natural antioxidants with synthetic antioxidants or to reduce their consumption. The results of the studies showed that plants are a rich source of phenolic compounds, flavonoids, tannins and other antioxidant compounds, which are the most important natural antioxidants.Nowadays, a wide group of plants and their extracts are considered as natural sources with antioxidant properties. The studies of carried out in Iran shows that edible and medicinal plants and their derivatives (essential oils, plant extracts) are widely used to prevent oxidative spoilage of food due to their strong and diverse antioxidant compounds. Among these, we can mention olive leaves, saffron petals, oregano, Froriepia subpinnata, Malva Sylvestris, Ferulago angulate, basil, hortensisj Sature, Salvia officinalis, turmeric, fennel, nettle, and black raspberry. Also, Dorema Aucheri, thyme, cinnamon and pomegranate peel have medicinal and therapeutic properties. Heizah grass plant is recommended as a health-giving and stabilizing combination of oils due to its easy access and cost-effectiveness in Iran. Manuscript profile -
Open Access Article
33 - Effect of Alfatocopherol and Ascorbyl-Palmitat as Antioxidant on Lipid Oxidation in Sausage
Zohre Shirmohammadi Alireza RahmanOxidation in meat products is one of the factors led to change the taste and quality. This research was carried out the effect of α-tocopherol and palmitate ascorbyl on the lipids oxidation in frankfurter sausages. This research is done based on factorial experime MoreOxidation in meat products is one of the factors led to change the taste and quality. This research was carried out the effect of α-tocopherol and palmitate ascorbyl on the lipids oxidation in frankfurter sausages. This research is done based on factorial experiment in a completely randomized design with three replications.Results showed that, the pH levels in different amount of α-tocopherol and palmitate ascorbyl were similar and significantly lower than the control samples. The pH level in all samples showed a decreasing trend by passing the time and this reduction amount were different in all samples. The peroxide value increased by passing the time but peroxide changes during time were not similar in all samples. The results showed after 45 and 60 days two samples, T2 and T4 did not show a significant difference with control sample but samples T1 , T3 and T5 were placed in the same group in time study. The highest amount of thiobarbituric acid, was observed in the control sample with highest amount of thiobarbituric acid in 45 and 60 days and the lowest amount was in the 0 day. On the other side, results showed in 0 day samples 5 and 2, in 45 and 60 days samples 3 and 4 had the highest and lowest %RSA, respectevily. Also, there was a difference significant between treatment levels. The results showed that the natural antioxidations α-tocopherol and palmitate ascorbyl are a useful additives to reduce lipid oxidation in frankfurter sausage. Manuscript profile -
Open Access Article
34 - The effect of lemon extract (Citrus limonum) on the shelf life of fillet of Huso huso during storage in cold conditions
Yasaman Fahim DezhbanIn this research, the effect of lemon extract (Citrus limonum) on the shelf life of fillet fish (Huso huso) during cold storage period was investigated. The effect of different levels of extract during a storage period of twelve days on the indicators of oxidative spoil MoreIn this research, the effect of lemon extract (Citrus limonum) on the shelf life of fillet fish (Huso huso) during cold storage period was investigated. The effect of different levels of extract during a storage period of twelve days on the indicators of oxidative spoilage and the number of bacteria (TVC & PTC) of fish fillets was carried out in the form of a completely randomized design with 4 treatments and three replications for each treatment. According to the findings of the research, the trend of changes in oxidative spoilage indices in each treatment during the storage period indicates that the effect of different concentrations of lime extract and the effect of storage time on fish fillets were statistically significant. In the investigated time periods, the experimental treatments significantly (P<0.05) changed the thiobarbituric acid index and the rate of microbial load increase in the control treatment was far more than the experimental treatments, and the extract of 0.5% didnt have a significant effect on number of TVC during storage period, while the use of 1% extract significantly (P<0.05) ) has reduced the number of PTC bacteria. According to the results, the use of extract and the storage time of fillets are significantly effective on most indicators of bacterial and oxidative spoilage. The results showed the use of lime extract concentrations of 1 and 1.5% has the best effectiveness in preserving fish fillets, and it has antioxidant and antibacterial effects, and it can be used as a biodegradable extract to preserve. Manuscript profile -
Open Access Article
35 - Graphene oxide based membranes with application in water treatment process
Mitra Mehrabi Fatemeh HonarasaIn recent years, graphene oxide has become one of the most attractive materials for design and manufacturing of membranes used in water treatment processes. Because graphene oxide shows unique properties, such as a high surface area, good mechanical properties, simple s MoreIn recent years, graphene oxide has become one of the most attractive materials for design and manufacturing of membranes used in water treatment processes. Because graphene oxide shows unique properties, such as a high surface area, good mechanical properties, simple synthesis techniques, presence of various functional groups on its surface and the possibility of surface modification. Various methods have been proposed for preparing graphene oxide membranes, each of which has its own advantages and disadvantages. On the other hand, it is possible to control and adjust the functions and performance of these separation membranes by making changes in the synthesis process or by modifying graphene oxide itself. Here, Firstly, the various common methods for preparing separation membranes based on graphene oxide will be discussed. Then, methods of controlling and adjusting the performance of these membranes to attain more favorable conditions for water treatment processes will be developed. Manuscript profile -
Open Access Article
36 - A pilot study based on advanced oxidation processes for reducing organic pollutants and secondary municipal wastewater treatment and reuse
Mahdieh Mostafavi Jalaledin Shayegan Amir Hossein JavidNowadays, the water industry has particular importance, for both drinking and industrial water usages. In most parts of the world, water resources are increasingly decreasing due to development and increasing demand. So, wastewater treatment and reuse is a priority. The MoreNowadays, the water industry has particular importance, for both drinking and industrial water usages. In most parts of the world, water resources are increasingly decreasing due to development and increasing demand. So, wastewater treatment and reuse is a priority. Therefore, currently, treatment technology needs new and innovative processes, according to the quality of raw water and wastewater. The recovered water should have the parameters of purity, sanitary desirability, environmental acceptance and economic feasibility based on industrial water standards for reuse. Therefore, in the current research, a pilot plant equipped with advanced oxidation processes was designed to purify and recover secondary municipal wastewater and remove residual pollutants in the effluent from the secondary urban wastewater treatment plant. During the test period, which was considered with a combination of processes including O3/H2O2, O3/UV, UV/H2O2, O3/UV/H2O2, the efficiency of removing organic pollutants was about 90%. In addition, disinfection, odor and color removal was also provided with very high efficiency. However, since the removal of turbidity and suspended matter was the inhibitory factor for some systems such as UV, by using sand filter, carbon filter and microfiltration, the removal efficiency of contaminants increased up to 98%. The obtained results indicate that the use of technologies based on advanced oxidation for wastewater reuse applications is one of the optimal options, even for wastewater with very high organic matter and it can be a suitable option as an optimal pretreatment method for reverse osmosis method. Manuscript profile -
Open Access Article
37 - Investigating the treatment of wastewater containing antibiotics by nanophotocatalytic method
Alieh Mohammadi Shaghayegh Laleh Mohammadreza DoostiToday, along with the progress of the industry, water pollution is also increasing. Pollutants enter the underground sources and surface waters from various routes and become a potential threat to human health and other organisms in the life cycle. Although various meth MoreToday, along with the progress of the industry, water pollution is also increasing. Pollutants enter the underground sources and surface waters from various routes and become a potential threat to human health and other organisms in the life cycle. Although various methods have been used to purify water and wastewater, most of these methods are not effective enough to remove many persistent organic pollutants, such as dyes, drugs, solvents, pesticides, etc. Antibiotics are among persistent organic pollutants that are rarely completely metabolized in the body after consumption, and 30 to 90% of them remain as active pollutants in the environment after elimination. Therefore, the use of new methods such as photocatalytic processes for antibiotics treatment have attracted the attention of researchers. The use of heterogeneous semiconductor nano photocatalysts as one of the advanced oxidation processes is considered due to their advantages including short-time procedure for synthesis of nano photocatalysts, nano photocatalyst ability to recycle and reuse, the formation of harmless products during the reaction, economic efficiency and compatibility with the environment. So, this approach can be an effective and efficient way to deal with environmental pollution caused by antibiotics. In this article, in addition to introducing the advanced oxidation method, recent studies on using of heterogeneous nano photocatalysts and most effective factors on photocatalytic reaction in water and wastewater treatment containing antibiotics have been reviewed. Manuscript profile -
Open Access Article
38 - 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
39 - NiBr2 Catalyst for the Oxidation of Alcohols and Aldehydes using NaClO: Kinetic Studies
Roya Ranjineh Khojasteh -
Open Access Article
40 - 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
41 - Synthesis and Application of New Oxidant bis(banzyltriphenylphosphonium) peroxodisulfate on Oxidation of Benzylhalides to Corresponding Benzylaldehyde Compounds
Rashid Badri Seid Sina Mohsenin Elham Tahanpesar -
Open Access Article
42 - Oxidation of some organic compounds with selective catalysis – Review
Masih Golkari -
Open Access Article
43 - Study of oxidation coupling of thiols to disulfides with Tripropylammonium fluorochromate (VI) (TriPAFC) in convenient and microwave conditions
Mohammad hosein farjam Amal Berisam -
Open Access Article
44 - A novel Sensor for Determination of Ascorbic Acid Based on Modified Carbon Paste Electrode
Sakineh Bahmani -
Open Access Article
45 - Selective Catalytic Oxidation of O-xylene to Phthalic Anhydride over VPO/HZSM-5: An Optimization Study
Ali Monajemi Vahid Mahdavi -
Open Access Article
46 - A review on the role of irisin and adipolin in diabetes and obesity conditions with an exercise approach
Maryam Shojaee Saleh RahmatiThe interplay between irisin, adipolin, physical activity, diabetes, and obesity is a multifaceted and complex issue with important implications for our understanding of metabolic health. Irisin and adipolin are cytokines that are secreted during physical activity. Thes MoreThe interplay between irisin, adipolin, physical activity, diabetes, and obesity is a multifaceted and complex issue with important implications for our understanding of metabolic health. Irisin and adipolin are cytokines that are secreted during physical activity. These cytokines play an important role in regulating metabolic functions in the body. Irisin, in particular, has received attention for its potential to increase thermogenesis and improve glucose homeostasis. It has been shown that physical activity increases the secretion of irisin, which leads to increased fat burning and energy consumption. Irisin turns white fat tissue into brown and helps to lose weight and prevent obesity. In the field of diabetes, irisin is promising as a potential therapeutic target. Studies have shown that irisin can increase insulin sensitivity and glucose uptake in skeletal muscle cells, which may be beneficial for people with type 2 diabetes. Additionally, irisin has anti-inflammatory properties and reduces chronic low-grade inflammation commonly associated with obesity and diabetes. Adipolin is another myokine associated with metabolic health. Similar to the effects of irisin, adipolin has anti-inflammatory properties and helps to regulate the metabolism of adipose tissue. The purpose of this article is to investigate the role of irisin and adipolin in diabetes and obesity with an exercise approach. Manuscript profile -
Open Access Article
47 - Influence of low electromagnetic field on photosynthetic apparatus and the amount of soluble sugar content in Lepidium sativum L.
Elham bagheri Abyaneh Ahmad Majd Sayeh JafariAbsract This study was carried out to evaluate the effect of extremely low frequency electromagnetic field (60 Hz) on photosynthesis apparatus and the amount of soluble sugar in Lepidium sativum L. Seeds were divided to dry and wet groups. In terms of wet group, seeds w MoreAbsract This study was carried out to evaluate the effect of extremely low frequency electromagnetic field (60 Hz) on photosynthesis apparatus and the amount of soluble sugar in Lepidium sativum L. Seeds were divided to dry and wet groups. In terms of wet group, seeds were soaked in water for 7 and 14 h. Dry and wet seeds were placed in the middle of a horizontally fixed coil and were exposed to extremely low frequency electromagnetic of a magnitude of 3.8 mT, for 30 and 60 minutes. Results demonstrated that the amount of chlorophyll a and b did not show the significant increase and the amount of chlorophyll ratio did not have any significant decrease. In addition, carotenoid, flavonoid content and membrane lipid peroxidation increased significantly and the amount of soluble sugar content declined significantly. Results confirms that the influence of electromagnetic field on carotenoid and flavonoids as well as membrane lipids caused the decrease of photosynthesis efficacy, and consequently caused the decline of the amount of soluble sugar. Manuscript profile -
Open Access Article
48 - Life Cycle Assessment and Environmental Effects of Rapeseed (Brassica napus L.) Production in Alborz Province
Shahram Khosravi Bami Mohammad Reza Ardakani Abdolmajid Mahdavi Damghani Amir Hossein Shirani Rad Parisa Nejatkhah ManaviIn recent years, growing awareness of environmental problems, particularly global warming, has raised concerns about the impact of greenhouse gas emissions on the global atmosphere. More life cycle assessments are used to assess and compare the environmental impacts of MoreIn recent years, growing awareness of environmental problems, particularly global warming, has raised concerns about the impact of greenhouse gas emissions on the global atmosphere. More life cycle assessments are used to assess and compare the environmental impacts of energy production and the economic aspects of producing a product worldwide. The aim of this study was to evaluate and analyze the environmental effects of canola production in terms of life cycle assessment (LCA) using SimaPro software with the aim of focusing on environmental impacts. In order to perform the experiments, one ton of rapeseed was used as the operational unit. Required data were collected from 30 farms in Alborz province. The results indicated that the potential of human toxicity, terrestrial ecotoxicity, freshwater aquatic ecotoxicity, and arine aquatic ecotoxicity per ton of rapeseed production were 881.63, 7.08, 288.67, and 618515.14 kg 1,4-dichlorobenzene equal (1,4-DB eq.), respectively, and photochemical oxidation potential was 0.43 kg C2H4 eq. The amount of nitrogen, phosphate and potassium used to produce each ton of rapeseed was about 84, 63 and 63 kg, respectively, and the amount of diesel fuel and electrical energy were estimated at 133.5 liters and 586 kW, respectively. Also, the CO2, CO, N2O and NOX emissions were about 361, 4.1, 11.5 and 4.8 kg per ton of rapeseed, respectively. It was also found that chemical fertilizers had the largest contribution among the evaluated inputs in the canola life cycle. As a whole, this study showed that the management of nutrients and pesticides can be considered as a strong point for optimizing the environmental impact of rapeseed production. Manuscript profile -
Open Access Article
49 - The Effect of Salicylic Acid on Some Physiological Reactions of Fenugreek (Trigonella foenum-graecum) Under Salinity Stress
A. Pasandi Pour H. Farahbakhsh M. Saffari B. KaramatThis study performed to investigate the effects different concentrations of salicylic acid (0, 5, 10, 15 and 20 µM) on membrane lipid peroxidation of fenugreek under levels of salinity stress (0, 50, 100, 150 and 200 mM) in hydroponic condition. The experiment con MoreThis study performed to investigate the effects different concentrations of salicylic acid (0, 5, 10, 15 and 20 µM) on membrane lipid peroxidation of fenugreek under levels of salinity stress (0, 50, 100, 150 and 200 mM) in hydroponic condition. The experiment conducted as factorial, in completely randomized design with three replications. Results showed that in plants treated with salinity, chlorophyll a, chlorophyll b and carotenoid contents were reduced in comparison with control plants. However, the salinity increased MDA, other aldehydes, catalase and peroxidase activity in shoots. Results also indicted that applying salicylic acid, especially with concentration of 10 and 15µM, increased the membrane lipid peroxidation and decreased the membrane stability index as compared to the control plants. Results also showed that using 5µM salicylic acid did not significantly improve the salt stress effects compared to the control plants. However, concentration of 20µM salicylic acid increased stress, and decreased the above mentioned parameters. Manuscript profile -
Open Access Article
50 - Effect of Heavy Metals Cu and Pb on Some Growth Characteristics, Proline Content and Lipid Peroxidation in Two Varieties of Mung Bean (Vigna radiate)
مهدی Kehstegar S.A. Afshar S.F. NematpourHeavy metal contaminations of agricultural fields, due to use of industrial waste water and excessive application of phosphate fertilizers, has become a major problem. Biological stability in soil for long-term, causes these metals accumulate in food chain and thus pote MoreHeavy metal contaminations of agricultural fields, due to use of industrial waste water and excessive application of phosphate fertilizers, has become a major problem. Biological stability in soil for long-term, causes these metals accumulate in food chain and thus potentially affect human health. To investigate the effects of copper and lead on growth parameters, lipid per oxidation, peroline content in two cultivars of mung bean, a factorial experiment was conducted in a completely randomized design. Copper used in three concentrations (0,150, 300 and 400mg/kg) and Pb in four concentration (0, 200, 400, 600mg/kg). After four weeks, plants grown in contaminated soil were collected and shoot height, root length, fresh weight and dry weight of shoot and root; proline content and lipid per oxidation in leaves were measured. The results showed that copper and lead had negative and toxic effect on the mung bean growth features. Generally with increasing concentrations of cu and Pb in soil, growth parameters were decreased. Between the two cultivars (Gohar and Sistan), Sistan was affected more than Gohar. Proline content and lipid peroxidation in treated mung bean were increased. Also Sistan cultivar showed more proline content and lipid per oxidation than Gohar. Manuscript profile -
Open Access Article
51 - Investigation of changes in the qualitative, oxidative and microbial indices of minced and non-minced beef during the freezing storage
F. Taiar A. Gharekhani A. TukmechiOne of the best ways to preserve meat is to freeze it, which can keep the meat in a natural state without significant spoilage. In this regard, this study aimed to investigate the effect of storage time (1, 7, 14, 21 and 28 days) in freezing (temperature -18 ° C) on MoreOne of the best ways to preserve meat is to freeze it, which can keep the meat in a natural state without significant spoilage. In this regard, this study aimed to investigate the effect of storage time (1, 7, 14, 21 and 28 days) in freezing (temperature -18 ° C) on chemical properties (humidity, ash, fat and protein), oxidation indices (peroxide, Conjugated diene and thiobarbituric acid), number of psychrophilic bacteria and structure of minced and non-minced beef fatty acids. The results showed that with increasing storage time, the amount of humidity and protein decreased, but the peroxide index, conjugated diene and thiobarbituric acid increased and there was no significant change in the amount of fat and ash in the samples. However, oxidation indexes of peroxide, conjugated diene and thiobarbituric acid in minced beef were not higher than minced meat. The maximum amount of peroxide (1.2 meqO2/kg) was related to the minced meat sample during 28 days of storage at freezing temperature. Based on gas chromatographic findings, there is no difference between minced meat and minced meat in terms of short chain fatty acids C10 to C20, and the amount of n-3 and n-6 fatty acids in minced meat is higher than minced meat. The results of bacterial count showed that the number of psychrophilic bacteria in meat samples did not increase during storage of meat at freezing temperature. Manuscript profile -
Open Access Article
52 - Encapsulation of wheat germ and probiotic bacteria Bacillus licheniformis using guar gum and maltodextrin by freeze drying method to increase the shelf life of wheat germ
Maryam Sharifi Mohammad Goli Mohaddaseh RamezaniAs a byproduct of the milling process, wheat germ provides a rich source of minerals, vitamins, tocopherols, phytosterols, amino acids, and important fatty acids. However, the high levels of unsaturated oil and high levels of enzymes lead to a reduction in wheat germ's MoreAs a byproduct of the milling process, wheat germ provides a rich source of minerals, vitamins, tocopherols, phytosterols, amino acids, and important fatty acids. However, the high levels of unsaturated oil and high levels of enzymes lead to a reduction in wheat germ's nutritional value during storage, which severely reduces the product's shelf life. The purpose of this study was to use guar gum and maltodextrin together with the freeze-drying encapsulation technique to extend the shelf life of probiotic wheat germ containing Bacillus licheniformis. In this regard, the durability of the encapsulated probiotic wheat germ was assessed for 360 days of storage using three different ratios of maltodextrin to guar gum, including 1 to 0.3, 0.1, and 0.03. The tests were carried out using a completely random design, and the averages were assessed using Duncan's test with a significance level of 5%. The effect of time on the changes in oxidation indices of the encapsulated wheat germ was evaluated positively. During 360 days of storage, the encapsulated sample with maltodextrin and guar gum in all examined ratios significantly reduced the total acid value (P< 0.05). In comparison to samples without probiotics, the inclusion of B. licheniformis probiotic considerably reduced the values of the total acid number and TBA index (P< 0.05). In the probiotic treatment, the levels of peroxide, anisidine, totox, mold, and yeast significantly increased with longer storage times (P< 0.05). Manuscript profile -
Open Access Article
53 - The effect of using orange peel (Citrus Sinensis) as a biosorbent on the quality properties and heavy metal content of cold-pressed sesame oil
I. Fathollahy R. Hasheminejad S. TalebiNowadays, due to the disadvantages of the conventional methods of removing heavy metals, application of agricultural waste and by-products from food processing as a biosorbent has been considered. This study investigates the effect of orange peel concentration and agita MoreNowadays, due to the disadvantages of the conventional methods of removing heavy metals, application of agricultural waste and by-products from food processing as a biosorbent has been considered. This study investigates the effect of orange peel concentration and agitation time on the quality characteristics and the level of heavy metals (Pb, Fe, Cu, Cd and As) in cold-pressed sesame oil. Results showed that the concentration of orange peel and agitation time significantly affected the quality characteristics and the level of heavy metals (p< 0.05). Compared to the control sample, the values of conjugated diene, conjugated triene, peroxide value, free fatty acids and chlorophyll of samples containing 6 g/l of orange peel decreased by 68.10, 50.66, 49.61, and 15.1, 44 and 65.76%, respectively. But carotenoid and total polyphenol contents increased by 8.03% and 37.30%, respectively. Also, conjugated diene, conjugated triene, peroxide value, free fatty acids and carotenoid decreased up to 30 minutes, chlorophyll decreased up to 45 minutes, and total polyphenol increased up to 45 minutes of agitation. Comparing with control sample, the content of lead, iron, copper, arsenic and cadmium in the oil sample containing 6 g/liter orange peel, decreased by 24.31, 43.49, 47.16, 36.49 and 21.53% respectively. Increasing agitation time up to 60 minutes, decreased the level of Pb, Fe, Cu, As and Cd by 35.87, 50.65, 56.12, 47.81 and 21.50%, respectively. The results showed that orange peel as a biosorbent can improve quality, reduce heavy metals in oil and create added value. Manuscript profile -
Open Access Article
54 - Effect of conventional cooking methods on lipid oxidation indices in lamb meat
آذین Pourkhalili مریم Mirlohi ابراهیم Rahimi محمد Hojatoleslami Lipid oxidation is one of the most deteriorative reactions occurred in foodstuff which has harmful impacts on the both food quality and consumer's health. This study was designed to speculate the influence of three conventional cooking methods including boi More Lipid oxidation is one of the most deteriorative reactions occurred in foodstuff which has harmful impacts on the both food quality and consumer's health. This study was designed to speculate the influence of three conventional cooking methods including boiling, frying and grilling on lipid oxidation parameters in cooked lamb meat. Sections of lamb meat from longissimus dorsi muscle, taken from native Lori-Bakhtiary sheep species were cut into uniform pieces and cooked using boiling, frying and roasting methods according to the cooking routine and tradition in Iranian society, in terms of temperature and time. Proximate compositions (moisture, lipid, ash and protein) in the raw and cooked meat were determined using the standard methods of analysis. Moreover, weight loss was measured after each treatment. Lipid oxidation parameters such as peroxide value, conjugated diene and TBARS indices were measured in the raw and cooked samples. Evaluation of lipid oxidation parameters showed that peroxide value was significantly decreased in all cooked samples. In contrast, conjugated diene value was significantly increased in the fried and grilled samples (p<0.05) while, boiling for 90 min was resulted in significant increase in TBARS number (p<0.05). Although compared to the other methods, lower temperature was applied in the boiling process; higher level of lipid oxidation was developed. This might be due to the longer cooking duration in boiling method. Therefore, in the future studies, reduction of boiling duration should be further assessed considering the microbial and nutritional point of views. Manuscript profile -
Open Access Article
55 - Effect of chitosan enriched with lycopene coating on fatty acid profile and fat oxidation parameters of rainbow trout fillet during refrigerated storage(orginal reserch article)
Seyede Samane Naghibi Ali Ehsani Hossein Tajik Alireza Talebi Nowruz DelirezhFish are the major dietary source of the polyunsaturated fatty acid for humans. Therefore, protection of fish against all types of oxidative corruption seems to be necessary. Lycopene is the source of natural antioxidant. The present study was conducted to evaluate anti MoreFish are the major dietary source of the polyunsaturated fatty acid for humans. Therefore, protection of fish against all types of oxidative corruption seems to be necessary. Lycopene is the source of natural antioxidant. The present study was conducted to evaluate antioxidant properties of lycopene (using the method of DPPH) and the combined effect of its various doses (1.5 and 3%) and chitosan on fat oxidation parameters and fatty acids composition of Rainbow trout fillet. The analysis was performed after 0, 8 and 16 days of storage of the samples at 4°C to determine peroxide value (PV) and free fatty acid content (FFA). In addition, fatty acid compositions was determined by Gas chromatography assay. In control treatment, the fatty acid composition of Rainbow trout fillet was consisted of %20.6±0.03 saturated fatty acids (SFA), %43.81±0.04 monounsaturated fatty acid (MUFA) and %32.83±0.03 polyunsaturated fatty acids (PUFAs) in 0 day. Statistical analysis showed that there were fewer changes in PV, FFA and proportion of fatty acids between chitosan and lycopene-chitosan treatment in regard to control sample during 16 days of refrigeration storage. Chitosan coated samples enriched with lycopene exhibited less rapidly lipid damages than all the other samples (p<0.05). In conclusion, the study indicated that lycopene has a good antioxidant activity that caused in favorable changes in the profile of fatty acids. Therefore, it can be used as a preservative in fish. Manuscript profile -
Open Access Article
56 - The effects of active and inactivate Saccharomyces cerevisiae and their combination on performance, antioxidant levels and lipid peroxidation index in the blood of Japanese quail
حسین نیک پیران حامد منافی توحید وحدت پورConsidering that various effects of probiotics, prebiotics, and symbiotic on production and growth of broiler chicks has been reported previously, the aim of this study was to investigate the effects of probiotics and prebiotics and their mixture, on performance, antiox MoreConsidering that various effects of probiotics, prebiotics, and symbiotic on production and growth of broiler chicks has been reported previously, the aim of this study was to investigate the effects of probiotics and prebiotics and their mixture, on performance, antioxidant levels and lipid peroxidation index in the blood of Japanese quails. Thus, 192 day- old- Japanese quails were distributed randomly to 4 groups with 4 replicates of 12 male and female and evaluated for 42 days. The control group only received basal diet, but in the 2nd group (probiotic group) active saccharomyces cerevisiae 1 gr/Kg of feed, in the 3rd group (prebiotic group) inactivated saccharomyces cerevisiae 0.5 gr/Kg-feed of feed, and in the 4th group (synbiotic group) 0.5 gr/Kg saccharomyces cerevisiae and 250 mg/Kg-feed inactivated saccharomyces cerevisiae was added to the basal diet. Results indicated that mean serum levels of Malondialdehyde (MDA) was statistically different among males of different groups (p<0.05). Also the highest and lowest MDA levels were observed in the 4th and 3rd groups respectively with a statistically significant difference (p<0.05). Total antioxidant capacity (TAC) of plasma was not different statistically in the studied groups. On the other hand, mean feed consumption and body weight in the 2nd and 3rd groups was increased in comparison to control group and FCR was decreased significantly in comparison to control and synbiotic group. The best carcass efficiency was observed in the prebiotic group. The results showed that the employed probiotics and prebiotics were only effective in performance of Japanese quails, but did not have a specific effect on serum-MDA and plasma-TCA levels. Manuscript profile -
Open Access Article
57 - Comparison of oxidative stress between Cytauxzoon feli infected and healthy cats
Kimia Zafari Seyedeh Ommolbanin GhasemianCytauxzoonosis is an emerging infectious disease that affects feral as well as domestic cats. This disease is caused by apicomplexan protozoan parasites belonging to the genus Cytauxzoon. Evaluation of oxidative stress indicators can clarify the adverse effects of Cytau MoreCytauxzoonosis is an emerging infectious disease that affects feral as well as domestic cats. This disease is caused by apicomplexan protozoan parasites belonging to the genus Cytauxzoon. Evaluation of oxidative stress indicators can clarify the adverse effects of Cytauxzoon¬ felis parasite on domestic cats. The present study aimed to investigate the prevalence of C. ¬felis parasite in cats of Shahrekord, Iran and to evaluate oxidative stress indicators in cats infected with C. ¬felis and compare it with healthy cats. This experimental study was conducted on blood samples of 100 cats that were referred to Shahrekord Veterinary Laboratory. Blood samples were taken in two separate test tubes for molecular analysis and determination of antioxidant parameters including catalase and lipid peroxidation. After collecting the samples, the PCR test was performed and oxidative stress markers were measured. The results of the present study showed that 3% of examined cats were infected with C. ¬felis, and the level of catalase enzyme in the cats infected with C. ¬felis was reduced by 9% compared to the healthy group, which was statistically significant (p=0.004). Moreover, lipid peroxidation level was significantly increased in cats infected with C.¬ felis compared to the parasite-free group (p=0.021). The findings of the present study showed that the prevalence of C.¬ felis parasite in cats was 3%. A decrease in the level of catalase enzyme and an increase in lipid peroxidation were observed in cats infected with C.¬ felis compared to cats free of the parasite. Manuscript profile -
Open Access Article
58 - The effect of different levels of garlic extract administration at various time periods on the extent of serumic lipid peroxidation in laying hens
saeed rasoulinejad nariman sheykhi hossein hassanpourFree radicals are involved in molecular changes and mutation and if they are not inactivated the resultant lipid peroxidation will damage all types of cellular macromolecules such as proteins, carbohydrates, lipids and nucleic acids. Natural diet containing antioxidants MoreFree radicals are involved in molecular changes and mutation and if they are not inactivated the resultant lipid peroxidation will damage all types of cellular macromolecules such as proteins, carbohydrates, lipids and nucleic acids. Natural diet containing antioxidants plays an important role in health, reproduction, performance, safety and growth in poultry. Garlic extract with a high antioxidant effect very useful against free radicals and infective agents. In this study, the effect of concentration of 0.01 and 0.02% of garlic extract in drinking water with periods of 2, 4 and 6 days a week were evaluated on lipid peroxidation. In addition to assessing the best concentration, economic aspects were also considered. So at the end of the third week, the best effect on reducing lipid peroxidation was seen in T3 which had received the concentration of 0.02% of garlic extract, two days a week. After six weeks of trial, Group T7 which had received the concentration of 0.02% garlic extract for 6 days a week, showed the best effect on reducing lipid peroxidation. Our studies also showed that garlic extract improved mass production in all groups compared to the control group. Considering the amount of lipid peroxidation at the end of the sixth week, herd performance in six weeks and calculating the average sale price of mass production, minus the cost of feed consumed per group, it is concluded that group T4 which received garlic extract concentration of 0.01% for 4 days a week (Saturday, Monday, Wednesday, Thursday) showed the best option in view of the economic conditions. Manuscript profile -
Open Access Article
59 - The Reaction of Some Qualitative Changes in the kernel of Different Walnut Genotypes in the Storage Period
Zahra Davarkhah Mehdi Hosseinifarahi محسن Radi Sedigheh GholipourThe walnut has a multipurpose use, so that it is cultivated in pomology for its fruit, in forestry for the use of wood, in pharmaceuticals as a medicinal plant, and in parks as an ornamental plant. In order to investigate some qualitative postharvest characteristics th MoreThe walnut has a multipurpose use, so that it is cultivated in pomology for its fruit, in forestry for the use of wood, in pharmaceuticals as a medicinal plant, and in parks as an ornamental plant. In order to investigate some qualitative postharvest characteristics the kernel of 14 superior walnut genotypes (Sisakht 1 and 2, Delirej 1 and 2, Shahniz 1 and 2, Kowkhdan 1 and 2, Setangan 1 and 2, Ganjegun 1 and 2 and Vezeg 1 and 2), an experiment was conducted in Kohgiluyeh and Boyar Ahmad provinces during 2019 to 2020. Qualitative characteristics such as oxidative stability of walnut kernels (peroxide value), percentage of moisture and weight loss of kernels after 6 months of storage and sensory evaluation after 14 months of storage at 25°C were evaluated. The results showed that the peroxides value in walnut kernels increased during storage. After 6 months of storage in the warehouse, the lowest peroxide value was observed in the genotypes of Vezg 1 and Ganjegun 2. The results of the sensory evaluation showed that Ganjegun 2 and Vezg 1 genotypes had the highest and Delirej 1 and 2 genotypes showed the lowest overall acceptance rate after 14 months of storage. Finally, Vezg 1 and Ganjegun 2 genotypes are recommended for consumption and also in breeding programs due to their better quality and durability after harvesting. Manuscript profile -
Open Access Article
60 - The Effect of Vitamin E Supplementation on Atherogenic and Lipid Peroxidation Responses Induced by Interval Training in Obese Male Wistar Rats
Fatemeh Hosseini reza rezaeeshirazi Saeed Ghorbani Abuzar JorbonianIntroduction: Obesity causes high disorders as increasing atherogenic index and physical activity is able to control obesity that can possibly increase lipid peroxidation. Therefore, the study was performed to evaluate the effect of vitamin E supplementation on atheroge MoreIntroduction: Obesity causes high disorders as increasing atherogenic index and physical activity is able to control obesity that can possibly increase lipid peroxidation. Therefore, the study was performed to evaluate the effect of vitamin E supplementation on atherogenic and lipid peroxidation responses induced by interval training in obese male Wistar rats.Materials and methods: The present study was a laboratory experimental method. Thirty male Wistar rats were randomly selected and divided into four groups: training (TG; N=8), supplementation (SG; N=8), training with supplementation (TSG; N=8), and Control (CG; N=8). The interval training consisted of 30 minutes running on treadmill per day, 5 days a week, for 8 weeks. Vitamin E supplementation was also available daily with 300 mg/g of body weight along with drinking water in SG. Finding: The finding revealed a significant decrease between TSG compared with CG in MDA (p=0.010), AIP (p=0.001), TC (p=0.001), TG (p=0.001) and LDL-C (p=0.001) variables. Also, MDA variable a significant decrease between TSG compared with TG (p=0.001). A significant decrease between TG compared with CG and SG in AIP (p=0.031), TC (p=0.024), TG (p=0.012) and LDL-C (p=0.010) variables were observed; while HDL-C variable showed a significant increase between TSG compared with CG (p=0.024) and TG compared with CG (p=0.031) (p≤0.05).Discussion and Conclusion: Vitamin E supplementation can improve atherogenic index and by increasing of antioxidant system causes reduce exercise-induced lipid peroxidation in obese rats; while the positive effects of improving body composition and controlling obesity were achieved to exercise. Manuscript profile -
Open Access Article
61 - 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
62 - Isothermal and cyclic oxidation behavior of AISI 430 ferritic stainless steel coated with titanium
Saeed Keshavarz Morteza Zandrahimi Hadi Ebrahimifar -
Open Access Article
63 - Investigation of oxidation behavior and Thermal spray of mechanically milled CoNiCrAlY–YSZ powders
Mostafa Tahari Morteza Shamanian Esfahani Mehdi Salehi -
Open Access Article
64 - Effect of heating rate on morphological features of oxidized electrolessnickel–boron coatings
akbar chami Bahman Nasiri-Tabrizi -
Open Access Article
65 - Effect of CTAB surfactant on microstructure and oxidation behavior of Ni-TiO2 Composite coating
Eisa Khoran Morteza Zanrahimi Hadi Ebrahimifar -
Open Access Article
66 - Schiff base functionalized Fe3O4@Boehmite Core-Shell Nano-Particles to Support MoO2(acac)2 for Catalytic Epoxidation of Alkenes
Mahdi Mirzaee Bahram Bahramian Mohadeseh Hematian -
Open Access Article
67 - Palladium-Cobalt on Reduced Graphene Oxide as an Electro-catalyst for Ethylene Glycol Oxidation in Alkaline Medium: Synthesis and Electrochemical Performance
Hamid Asgari Somayeh Majidi -
Open Access Article
68 - Effects of Fe and Si Additions on Erosion-Oxidation Behavior of Nickel Alloys in Chlorine-Containing Oxidative Atmospheres
Mohammad Emami Shigenari Hayashi -
Open Access Article
69 - The effect of Benzyladenin on reducing lipid peroxidation and carotenoids in Lilium oriental. cv belladonna
Reyhane Arefnia Abdolah Hatamzadeh mahmood ghasemnezhadIn order to evaluate the effect of pre-harvest spray with Benzyladenin (BA) on improving flower quality and delaying flower and leaf senescence in Lilium oriental, a study was carried out as a spilt plot factorial experiment where 5 levels of Benzyladenin (0, 25, 50, 75 MoreIn order to evaluate the effect of pre-harvest spray with Benzyladenin (BA) on improving flower quality and delaying flower and leaf senescence in Lilium oriental, a study was carried out as a spilt plot factorial experiment where 5 levels of Benzyladenin (0, 25, 50, 75, and 100 ppm) with three replications and two stages of spraying (budding start and before dyeing buds). Assaying the traits were done in seventh and twelfth two-days after harvest. The flowers were sprayed at two stages, budding and before flowering in the bud stage. Distilled water was used as control. Characteristics such as flower shelf life and lipid peroxidation in petals and leaves on seventh and twelfth days after harvest and carotenoids contents of petals on seventh and twelfth days after harvest were measured. Results showed that spraying with 100 ppm BA at the beginning of flower pigmentation was more effective in delaying senescence in flowers and leaves as compared to the control. Lipid peroxidation in leaves and flowers treated with 100 ppm BA application was significantly lower than the control. In contrast, carotenoid content of flowers sprayed with 100 ppm BA was higher and the lowest values were found in the control. In total, it was found that BA maintains stability by improving the quality and prolonging the flowers’ survival. Manuscript profile -
Open Access Article
70 - Study of physiological and biochemical responses of rice mutant lines derived from gamma ray irradiation and local varieties under saline field conditions
Leila Bagheri Sara saadatmand Neda Soltani Vahid NiknamRice (Oryza sativa L.) is one of the crops which is the main source of food for more than a third of the world's population. Limiting factors such as environmental stress require increasing the yield of agricultural products per unit area. Soil salinity is one of the mo MoreRice (Oryza sativa L.) is one of the crops which is the main source of food for more than a third of the world's population. Limiting factors such as environmental stress require increasing the yield of agricultural products per unit area. Soil salinity is one of the most important factors reducing the productivity of crops throughout the world. Induced mutation is widely used as an effective tool for improving the yield, quality, and resistance to biotic and abiotic stresses in product modification. In order to screen salt-tolerant superior mutant lines of rice, 10 mutant lines (M5) derived from three Iranian local varieties (Tarom, Anbarbo, and Hasani) were assessed during two generations (M6 and M7) at saline field (EC of soil was 6-8 ds/m). The experiment was conducted based on a randomized complete block design with three replications. Three salt-tolerant superior mutant lines (13-3, 32-18 and 22-1) were selected in comparison with their parents (control). Physiological parameters of superior mutant lines (high stomatal conductivity, Fv/Fm, and total chlorophyll) were biochemical (lower Na+/K+ ratio, high proline accumulation, less membrane damage). These superior mutant lines will be introduced as new salt-tolerant rice varieties and sources of plant germplasm. Manuscript profile -
Open Access Article
71 - Investigation on the effect of NaCl on the activity of peroxidase and peroxidation of lipids in roots of two sensitive and tolerant cultivars of wheat (Triticum aestivum L.)
فائزه Ghanati, Elham Nayyeri TorshiziIn this paper, the effect of NaCl on the activity of soluble (SPO) and wall bound peroxidases (IPO, CPO) as well as the level of lipid peroxidation in roots of two cultivars of wheat (Triticum aestivum L.) were studied. Two wheat cultivars, Mahooti and Alamoot were sele MoreIn this paper, the effect of NaCl on the activity of soluble (SPO) and wall bound peroxidases (IPO, CPO) as well as the level of lipid peroxidation in roots of two cultivars of wheat (Triticum aestivum L.) were studied. Two wheat cultivars, Mahooti and Alamoot were selected as salt-tolerant and salt-sensitive cultivars, respectively. The plants were treated with 300mM NaCl for 24, 48 and 96 hours. The content of lignin and the ratio of CWP/FW were studied during 96 hours of treatment as well. Salt treatment increased the rate of lipid peroxidation and enhanced the activity of wall bound peroxidases, particularly in roots of Mahooti. These phenomena were also associated with an increase in the content of lignin in the walls. The activity of soluble peroxidase was also stimulated which helps to more scavenging of peroxide radicals produced by NaCl treatment. Meanwhile, the results suggest that in salt-tolerant wheat cultivar, NaCl treatment accelerated aging process. Manuscript profile -
Open Access Article
72 - 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
73 - Structural, Magnetic and Catalytic Properties of Non-Stoichiometric Lanthanum Ferrite Nano-Perovskites in Carbon Monoxide Oxidation
Zahra Ramezani Azim Malekzadeh Mahnaz ghiasi Ahmad Gholizadeh Elham Ghiasi -
Open Access Article
74 - 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
75 - Structural, Magnetic and Catalytic Properties of Non-Stoichiometric Lanthanum Ferrite Nano-Perovskites in Carbon Monoxide Oxidation
Zahra Ramezani Azim Malekzadeh Mahnaz Ghiasi Ahmad Gholizadeh Elham Ghiasi -
Open Access Article
76 - Effect of Coating Process Parameters on Corrosion Behavior of Ti-6Al-4V
Mohammad Hossein Majidi Amin Rabiezadeh Ahmad Afsari -
Open Access Article
77 - بررسی و مقایسه روش های مختلف استخراج DNA در گیاهان دارویی و معطر
مهدی رحیم ملکگیاهان دارویی به دلیل داشتن متابولیت های ثانویه از اهمیت زیادی در علوم پزشکی و داروسازی برخوردارند. اسانس ها، آنتی اکسیدان ها و فلاونوییدها ترکیبات اصلی بسیاری از گیاهان دارویی را تشکیل می دهند. این ترکیبات بالاخص آنتی اکسیدان ها می­توانند باعث اکسیدشدن قسمت­های Moreگیاهان دارویی به دلیل داشتن متابولیت های ثانویه از اهمیت زیادی در علوم پزشکی و داروسازی برخوردارند. اسانس ها، آنتی اکسیدان ها و فلاونوییدها ترکیبات اصلی بسیاری از گیاهان دارویی را تشکیل می دهند. این ترکیبات بالاخص آنتی اکسیدان ها می­توانند باعث اکسیدشدن قسمت­های مختلف گیاه و محتویات وراثتی (DNA)، در اثر وارد شدن زخم به گیاه گردند. امروزه با پیشرفت علم بیوتکنولوژی، نشانگرهای مولکولی مختلفی برای بررسی روابط فیلوژنتیکی، تهیه نقشه های ژنتیکی گیاهان و حذف نمونه های تکراری در بانک ژن ارایه شده است. اکثر این روش ها نیاز به استفاده از DNA با کیفیت و خلوص بالا دارند. روش­های مختلفی برای استخراج DNA از گیاهان وجود دارد. در بیشتر این روش­ها سه نکته اساسی مدنظر است که شامل کیفیت DNA، سرعت استخراج و میزان آن می باشد. گیاهان دارویی به علت داشتن ترکیبات فنولی فراوان و ناخالصی­های زیاد نیازمند به کارگیری روش مناسبی برای استخراج DNA در جهت جلوگیری از اکسید شدن می­باشد. در این تحقیق چهار روش استخراج DNA در چند گیاه دارویی که شامل آویشن دنایی (Thymus daenensis)، نعناع (Mentha spp.)، نعناع فلفلی(Mentha pipertia)، پونه (Mentha longifolia) و چند گونه بومادران (Achillea) مورد بررسی و مقایسه قرار گرفتند. این روش ها شامل موری و تامسون، روش تغییر یافته پریتیلا و هم­کاران، روش تغییر یافته دلاپورتا و هم­کاران و روش کوماتسودا و هم­کاران با استفاده از همزن بود. نتایج نشان داد که مخلوطی از دو روش موری و تامسون و پریتیلا، با استفاده از بافر دو مرحله ای و استفاده همزمان از دو ترکیب 2- مرکاپتواتانول و پلی ونیل پیرولیدین باعث کاهش شدید اکسیداسیون و مقادیر مناسب DNA می گردد. کمترین میزان DNA و بیشترین سرعت استخراج در روش کوماتسودا و هم­کاران به دست آمد. در بین گیاهان مورد مطالعه بیشترین و کمترین میزان اکسیداسیون DNA به ترتیب در گیاه بومادران و نعناع مشاهده شد. Manuscript profile -
Open Access Article
78 - ارزیابی فعالیت آنتی اکسیدانی عصاره برگ درخت توت سفید (.Morus alba L)
پریسا صدیق آرا عباس برینمقدمه و هدف: امروزه به سبب عوارض جانبی آنتی اکسیدان های سنتتیک، تمایل به استفاده از آنتی اکسیدان های طبیعی به ویژه با منشأ گیاهی افزایش یافته است. در این مطالعه فعالیت آنتی اکسیدانی برگ درخت توت مورد بررسی قرار گرفته شد.روش تحقیق: در ابتدا با توجه به اینکه خاصیت آ Moreمقدمه و هدف: امروزه به سبب عوارض جانبی آنتی اکسیدان های سنتتیک، تمایل به استفاده از آنتی اکسیدان های طبیعی به ویژه با منشأ گیاهی افزایش یافته است. در این مطالعه فعالیت آنتی اکسیدانی برگ درخت توت مورد بررسی قرار گرفته شد.روش تحقیق: در ابتدا با توجه به اینکه خاصیت آنتی کسیدانی اکلیل کوهی (Rosmarrnus Officinalis L.) به اثبات رسیده است، این گیاه به عنوان شاهد در نظر گرفته شد. عصاره آبی و الکلی رزماری و برگ توت با آزمون ارزیابی احیا یون مس مورد بررسی قرار گرفت. سپس میزان مهار لیپید پراکسیداسیون چربی های زرده تخم مرغ توسط توسط عصاره الکلی برگ توت در سه غلظتmg/L 2/0 و 2 و20 توسط آزمون تیوباربیتوریک اندازه گیری شد.نتایج و بحث: یافته های آزمایش نشان داد که قدرت احیا عصاره توت در دو فاز آبی و الکلی از رزماری بیشتر است. هم­چنین میزان لیپید پراکسیداسیون در سیستم زرده تخم مرغ در دو گروه mg/L 2 و 20 به طور معنی داری کاهش یافت.توصیه کاربردی /صنعتی: با توجه به نتایج این بررسی عصاره برگ درخت توت دارای توان آنتی اکسیدانی قابل ملاحظه ای جهت استفاده در صنعت غذا است. Manuscript profile -
Open Access Article
79 - فعالیت آنتی اکسیدانی عصاره متانولی Uapacato genensis در موشهای تحت تاثیر Plasmodium berghei NK65
امینا بوسولا اولوروکوبا بن احمد چیدو یحیی محمدثانیBackground & Aim: Oxidative stress has been linked to the development of systemic complications in malaria infection. Recent approaches in treatment of malaria suggest that the control of oxidative stress in infected patients may be of therapeutic advantage. Th MoreBackground & Aim: Oxidative stress has been linked to the development of systemic complications in malaria infection. Recent approaches in treatment of malaria suggest that the control of oxidative stress in infected patients may be of therapeutic advantage. The stem bark and leaves of Uapaca togoensis are used locally in the treatment of various diseases including malaria. This study aimed to evaluate the antioxidant activities of the methanol stem bark extract of the plant in Plasmodium berghei infected mice. Experimental: Mice were inoculated intraperitoneally with 0.2 ml of parasitized erythrocytes and parasitemia level assessed after 72 h by the preparation of thin blood films stained with Geimsa stain. The mice were divided into five groups of six mice each. Groups I and V were administered with distilled water (10 ml/kg) and chloroquine (5 mg/kg) orally for four days. The extract at doses of 250, 500 and 1,000 mg/kg were orally administered to groups II, III and IV, respectively, for the same period. Mice were sacrificed under light chloroform. Blood was collected by cardiac puncture and centrifuged at 2,500 rpm for 15 minutes to obtain the serum. The serum was then analyzed to determine the levels of glutathione (GSH), superoxide dismutase (SOD), catalase (CAT) and lipid peroxidation product (malondialdehyde - MDA). Results: Oral median lethal dose of the methanol stem bark extract of Uapacatogoensis was estimated to be greater than 5,000 mg/kg. Administration of the extract to P. berghei infected mice produced a significant (p<0.05) increase in superoxide dismutase, reduced glutathione and catalase levels in. However, a significant (p<0.05) decrease in lipid peroxidation activity in the parasitized mice was observed. Recommended applications/industries: The plant possesses antioxidant property which can be exploited in the .management of oxidative stress caused by malaria Manuscript profile -
Open Access Article
80 - مکانیسم سیستم دفاع آنتی اکسیدانی غیر آنزیمی در اندام های مختلف Catharanthus roseus برای محافظت از غشای سلولی
شاهین مردانی نژاد رمضانعلی خاوری نژاد سارا سعادتمند فرزانه نجفی پرویز آبرومند آذرمقدمه و هدف: وقتی سطح رادیکال های آزاد افزایش می یابد و سیستم های آنزیمی و ملکول های کوچک آنتی اکسیدانی قادر به محافظت از موجود زنده نباشد، دریافت آنتی اکسیدان از منابع خارجی لازم به نظر می رسد. این مطالعه با هدف بررسی توان آنتی اکسیدانی قسمت های مختلف کاتارانتوس Moreمقدمه و هدف: وقتی سطح رادیکال های آزاد افزایش می یابد و سیستم های آنزیمی و ملکول های کوچک آنتی اکسیدانی قادر به محافظت از موجود زنده نباشد، دریافت آنتی اکسیدان از منابع خارجی لازم به نظر می رسد. این مطالعه با هدف بررسی توان آنتی اکسیدانی قسمت های مختلف کاتارانتوس روزئوس انجام شد. مواد و روش ها: پتانسیل آنتی اکسیدانی عصاره های اتانولی ریشه ها، ساقه ها، برگ ها، گل ها، غلاف دانه ها و دانه های گیاه کاتارانتوس روزئوس بر اساس مهار رادیکال آزاد 1، 1-دی فنیل-2-پیکریل هیدرازیل (DPPH)، مهار پراکسیداسیون لیپیدی بوسیله روش فریک تیوسیانات (FTC) و مهار مالون دی آلدئید با روش تیوباربیوتریک اسید (TBA) در مقابل استانداردهای بوتیلیت هیدروکسی تولوئن (BHT)، بوتیلیت هیدروکسی آنیسول (BHA) و آسکوربیک اسید مورد بررسی قرار گرفت. نتایج و بحث: محتوای فنلی در ریشه (58/2±61/61 میکروگرم معادل گالیک اسید در هر میلی گرم وزن خشک عصاره) طبق روش فولین-سیوکالتیو بیشتر از سایر اندامها بود. در مهار نیمی از رادیکال های آزاد DPPH عصاره ریشه، بذر و برگ به ترتیب با 02/2±9/238 ، 42/1±78/253 و 56/2±95/277 میکرو گرم در میلی لیتر بهترین عملکرد را داشتند. در مهار پراکسیداسیون لینولئیک اسید، عصاره ریشه بهترین قدرت مهاری را بعد از آسکوربیک اسید و BHT داشت و عصاره های برگ و دانه عملکردی مشابه با BHA داشتند. در مهار مالون دی آلدئید عصاره ریشه و دانه به ترتیب با 54/0±68/78 و 66/0±44/77 درصد نسیت به سایر عصاره ها بهترین عملکرد را داشتند. ضریب تشخیص پیرسون بین محتوای فنلی و ظرفیت آنتی اکسیدانی عصاره ها مطابق روش های DPPH، FTC و TBAبالا و معادل 838/0-، 895/0 و 740/0 بود. توصیه کاربردی/ صنعتی: نتایج این تحقیق می تواند نوید بخش استفاده از توان آنتی اکسیدانی اندام این گیاه بویژه در مهار رادیکال های آزاد و پراکسیداسیون لیپیدی باشد. Manuscript profile -
Open Access Article
81 - خاصیت آنتی اکسیدانی اسانس میوه گلپر برفی (Heracleum lasiopetalum Boiss) بر خواص شیمیایی چیپس سیب زمینی
لیلا صداقت بروجنی محمد حجت الاسلامی جواد کرامت عبدالله قاسمی پیربلوطیمقدمه و هدف: آنتی­ اکسیدان های شیمیایی، اکسیداسیون چربی و ترکیبات حاصل از آن به عنوان عوامل سرطان زا در مواد غذایی شناخته می شوند. در این مطالعه اثر اسانس میوه گلپر برفی با نام محلی کرسوم بر اکسیداسیون روغن و خواص فیزیکوشیمیایی چیپس سیب زمینی در مقایسه با آنتی Moreمقدمه و هدف: آنتی­ اکسیدان های شیمیایی، اکسیداسیون چربی و ترکیبات حاصل از آن به عنوان عوامل سرطان زا در مواد غذایی شناخته می شوند. در این مطالعه اثر اسانس میوه گلپر برفی با نام محلی کرسوم بر اکسیداسیون روغن و خواص فیزیکوشیمیایی چیپس سیب زمینی در مقایسه با آنتی اکسیدان های متداول BHA و TBHQ بررسی شده است. روش تحقیق: اسانس میوه گلپر برفی به روش تقطیر با آب توسط کلوینجر استخراج شد و توسط روش GC/MS به منظور تعیین ترکیب شیمیایی آن تجزیه شد. اسانس به روغن سرخ کردن چیپس های سیب زمینی در غلظت 3000 قسمت در میلیون اضافه گردید و اثر آنتی اکسیدانی آنبر چیپس های تولید شده با اندازه گیری عدد پراکسید، تیوباربیتوریک اسید و اسیدیته روغن استخراجی از چیپس مورد ارزیابی قرار گرفت. BHA و TBHQ به عنوان آنتی اکسیدان های متداول در غلظت 200 قسمت در میلیون اضافه شدند و روند کاهش اکسیداسیون در 45 روز ارزیابی شد. نتایج و بحث: اسانس میوه گلپربرفی مانند آنتی اکسیدان های سنتزی می تواند اکسیداسیون را کاهش دهد. تست TBA نشان داد که اسانس گلپر برفی در کاهش واکنش اولیه TBAنسبت به BHA موثرتر است در حالی که TBHQ کمترین مقدار را داشته است. توصیه کاربردی/ صنعتی: اسانس میوه گلپربرفی دارای فعالیت آنتی اکسیدانی است که می تواند به عنوان آنتی اکسیدان طبیعی در مواد غذایی در طول نگهداری استفاده شود. Manuscript profile -
Open Access Article
82 - Synthesis, characterisation and catalytic activity of Schiff base Cu(II) metal complex
Imtiyaz Rasool Parrey Athar Adil Hashmi Babu Lal Swami Shaeel Ahmed AL-Thabaiti -
Open Access Article
83 - Process Optimization and Kinetic study of Wet Peroxide Oxidation of Phenol in Wastewater over Mg-Al Nano Mixed Oxide
Masoud Samandari Afshin Taghva Manesh Seyed Ali Hosseini Sakineh Mansouri -
Open Access Article
84 - Synthesis and characterization of Pt3Co bimetallic nanoparticles supported on MWCNT as an electrocatalyst for methanol oxidation
Mohammad Hossein Nobahari Ahmad Nozad Golikand Mojtaba Bagherzadeh -
Open Access Article
85 - Activity of Cu-Co-M (M= Ce, Ni, Au, Mg) catalysts prepared by coprecipitation method, calcined at high temperature for CO oxidation
Gaurav Rattan Chirag Khullar Maninder Kumar -
Open Access Article
86 - An efficient and selective method for conversion of oximes, semicarbazones and phenylhydrazones to the corresponding carbonyl compounds under solvent-free conditions
Khadijeh Yadollahzadeh Mahmoud Tajbakhsh -
Open Access Article
87 - 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
88 - Catalytic oxidation of airborne toluene by using copper oxide supported on a modified natural diatomite
Seyed Reza Azimi Pirsaraei Hasan Asilian Mahabadi Ahmad Jonidi Jafari -
Open Access Article
89 - Photocatalytic oxidation of an organophosphorus simulant of chemical warfare agent by modified TiO2 nanophotocatalysts
Abbas Besharati-Seidani -
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90 - Photocatalytic degradation of ciprofloxacin in the presence of synthesized ZnO nanocatalyst: The effect of operational parameters
Solmaz Aghdasi Mohammad Shokri -
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91 - Green synthesis of magnetic copper ferrite nanoparticles using tragacanth gum as a biotemplate and their catalytic activity for the oxidation of alcohols
Ali Ramazani Saeid Taghavi Fardood Zahra Hosseinzadeh Fariba Sadri Sang Woo Joo -
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92 - Developments of modified magnetic nanoparticle -supported heteropolyacid catalytic performances in dibenzothiophene desulfurization
Hossein Salavati Abbas Teimouri Shahnaz Kazemi -
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93 - Rice husk ash (RHA): A Highly efficient solid acid catalyst for the oxidation of alcohols and trimethylsilyl, tetrahydropyranyl and methoxymethyl ethers with CrO3
Farhad Shirini Masoumeh Abedini Mahnaz Shamsi-Sani Mohadeseh Seddighi -
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94 - Hydrogen peroxide oxidation of primary alcohols by thiosemicarbazide Schiff base metal complexes
Maryam Tayebani Behroze Shafaat Marzi Iravani -
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95 - Magnetic ZnFe2O4 nanoparticles as an efficient catalyst for the oxidation of alcohols to carbonyl compounds in the presence of oxone as an oxidant
Ali Ramazani Fariba Sadri Abdolhossain Massoudi Mehdi Khoobi Sang Woo Joo Leila Dolatyari Nahid Dayyani -
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96 - Efficient oxidation of sulfides using a molybdenum(VI)–dioxo complex containing an benzimidazole ligand
Bozorgmehr Maddah Arash Sarabi Tabrizi -
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97 - The role of carburization temperature on the molybdenum carbide surface and their catalytic activity
Femi Francis Oloye -
Open Access Article
98 - Oxidation of greenhouse gases, CH4 and CO, over LaMnxNi1-xO3±δ mixed oxide
Farhad Banisharif Mohammad Reza Dehghani Golshan Mazloom Yahya Hojatpanah -
Open Access Article
99 - Enhancement of photocatalytic degradation of 4-nitrophenol by integrating Ag nanoparticles with ZnO/HZSM-5 nanocomposite
Baharak Divband Azadeh Jodaei Masumeh Khatamian -
Open Access Article
100 - Layered double hydroxides: Novel nanocatalysts for combustion of gaseous toluene from polluted air
Sepideh Naghel-Danaei Seyed Ali Hosseini Aligholi Niaei -
Open Access Article
101 - Mn(II)-Schiff base complex immobilized onto MCM-41 matrix as a heterogeneous catalyst for epoxidation of alkenes
Hassan Zakeri Saeed Rayati Goldasteh Zarei Ali Parsa Forogh Adhami -
Open Access Article
102 - Spotlight: Catalytic vinylogous anomeric based oxidation (Part I)
Meysam Yarie -
Open Access Article
103 - Spotlight: Phthalocyanine-based catalysts
Mohammad Dashteh -
Open Access Article
104 - Oxidative desulfurization of light fuel oil by using hydrogen peroxide in the presence of acetic acid catalyst
Neda Ghaeli Mohammad Hassan Vakili -
Open Access Article
105 - Non-noble supported catalyst for oxidation of glucose under mild reaction conditions
Mohd Hasbi Ab. Rahim Pui Xin Ng Anisah Sajidah Haji Saud Mohd Asyrak Deraman Gaanty Pragas Maniam -
Open Access Article
106 - Electrochemical amperometric sensing of loratadine using NiO modified paste electrode as an amplified sensor
Neda Raeisi-Kheirabadi Alireza Nezamzadeh-Ejhieh Hamidreza Aghaei -
Open Access Article
107 - Magnetic Pomegranate Peel Extracts Modified Iron Oxide Nanocatalyst for Green and Selective Oxidation of Benzyl alcohols
Sheyda Iranfar Hakimeh ziyadi Malak Hekmati Ensieh Ghasemi Davoud Esmaeili Pegah Haghighi -
Open Access Article
108 - Manganese porphyrin supported on activated carbon as a new catalyst for epoxidation of alkenes with hydrogen peroxide
Saeed Rayati Makan Etefagh Majid Masteri-Farahani -
Open Access Article
109 - Encapsulation of a Cu(II) complex with 2,6-pyridine dicarboxylic acid in zeolite-X nanoporosity as an efficient heterogeneous catalyst for oxidation of aniline
Fatemeh Hassani Mahboubeh A. Sharif Masoumeh Tabatabaee Mahboobeh Mahmoodi -
Open Access Article
110 - Synthesis, Characterization, and Biological Activity of Chromium Complexes as Efficient and Novel Catalysts for Direct Synthesis of Carbonyl Compounds from Benzyl/Cycloalkyl Bromides in Water under Aerobic Oxidation
Samaa Raoof Fadia Ahmed Alyaa Al-barwari Mohanad Saleh -
Open Access Article
111 - Synthesis and Characterization of Hybrid Dual Metallic Complexes of Schiff Base Containing (Cd and Mn/Fe/Co/Ni) Derived from Isatin and 1,4-Phenylenediamine As Novel Organometallic Catalysts for Rapid and Efficient Epoxidation of Alkenes
Abeer Mohammed Jassim Alyass Khalaf Khallow -
Open Access Article
112 - Silver supported on mesoporous silica combination with H2O2: active, recyclable, and selective oxidation component for conversion of olefines to 1, 2-diols
Shakiba Samadi Hadi Shafiei Davoud Soudbar Hassan Fathinejad -
Open Access Article
113 - Propane Oxidative Dehydrogenation on BiP1-xVxO4 Supported Titania Catalysts
Mbarka Ouchabi Loulidi Ilyasse Mahfoud Agunaou -
Open Access Article
114 - Alkyl Ammonium Tungstate Bonded to Fe3O4@SiO2 Nanoparticles; a highly efficient Catalyst for the Oxidation of Symmetrical Sulfides to Symmetrical Sulfoxides
Seyed-Mola Khatami Mehdi Khalaj Majid Ghashang -
Open Access Article
115 - Efficient Epoxidation of Alkenes using New Organometallic Catalysts ((E)-2,6-dimethoxy-4-((2-(5-methyl-1,3,4-thiadiazol-2-yl)hydrazono)methyl)phenol M: Cr, Fe, Co, Cu): An Antimicrobial and Theoretical Study of Catalyst
Rasha Mahmood Mohammed Abowd Asmaa Sabti -
Open Access Article
116 - Rapid oxidation of alcohols and trimethylsilyl and tetrahydropyranyl ethers with CrO3 in the presence of sulfonic acid functionalized ordered nanoporous Na+-montmorillonite
Farhad Shirini Masoumeh Abedini Ahmad Nasiri Abkenar Bita Baghernejad -
Open Access Article
117 - Oxidation of benzylic alcohols with molecular oxygen catalyzed by Cu3/2[PMo12O40]/SiO2
Hamid Aliyan Razieh Fazaeli Ahmad Reza Massah Hamid Javaherian Naghash Saeed Moradi -
Open Access Article
118 - Spotlight: Catalytic anomeric based oxidation
Meysam Yarie -
Open Access Article
119 - Role of water in the partial oxidation of propane to acrylic acid over Mo1V0.3Te0.23Nb0.12Ox catalyst
Golshan Mazloom Seyed Mehdi Alavi -
Open Access Article
120 - عملکرد و پاسخ های متابولیکی گاوهای تازه زا به استفاده از منبع پیش ساز قندی به صورت روزانه و یا به صورت یک روز در میان
م. کاظمی بن چناری م. جهانی مقدم ع.ر. علیزاده پ. قدرتی ح. شهابی ا. محجوبی م. گرجی دوزتأثیر نحوه ارائه منبع قندی (ترکیب آن شامل؛ 500 گرم گلیسرین، 250 گرم منوپروپیلن گلیکول، 150 گرم کلسیم پروپیونات، 1 گرم نیاسین و 350 میلی­گرم سولفات کبالت در هر کیلوگرم) در گاوهای شیری (به صورت پیوسته یا یک روز در میان) بر عملکرد، متابولیت­ های خونی و آنزیم­ ه Moreتأثیر نحوه ارائه منبع قندی (ترکیب آن شامل؛ 500 گرم گلیسرین، 250 گرم منوپروپیلن گلیکول، 150 گرم کلسیم پروپیونات، 1 گرم نیاسین و 350 میلی­گرم سولفات کبالت در هر کیلوگرم) در گاوهای شیری (به صورت پیوسته یا یک روز در میان) بر عملکرد، متابولیت­ های خونی و آنزیم­ های کبدی مورد مطالعه قرار گرفت. تعداد 24 رأس گاو شیری چند بار زایش­ کرده در قالب طرح کاملاً تصادفی (8 رأس در هر تیمار) برای مدت 14 روز بعد از زایش به صورت انفرادی تغذیه شدند. تیمارهای آزمایشی شامل؛ 1) عدم استفاده از منبع قندی، 2) استفاده پیوسته از منبع قندی و 3) استفاده یک روز در میان از منبع قندی. استفاده روزانه از منبع قندی در روزهای 3، 4، 5، 6 و 7 بعد زایش و استفاده یک روز در میان در روزهای 3، 5، 7، 9 و 11 بعد زایش بود. مقدار مصرف منبع قندی به صورت مشابه و 1 کیلو در روز برای هر رأس بود. نمونه­ های خون در روزهای 5 و 14 از دام ­ها گرفته شد. نتایج نشان داد ماده خشک مصرفی در روش استفاده یک روز در میان بهبود یافت (0.05=P). مقدار شیر تصحیح شده برای چربی برای گروه شاهد بیشترین مقدار بود (0.01=P). پروتئین و چربی شیر در تیمارهایی که منبع قندی استفاده کرده بودند نسبت به گروه شاهد بیشتر بود. تعداد سلول­ های بدنی در تیماری که منبع پیش­ساز قندی استفاده شده بود نسبت به گروه شاهد کمتر بود (64.5 در برابر 103×365 در هر میلی­لیتر بود) (0.02=P). غلظت پروتئین کل در تیماری که منبع قندی به صورت روزانه استفاده شده بود بالاتر بود. غلظت انسولین نیز در تیماری که منبع قندی را به صورت پیوسته مصرف نمودند در روز 5 بالاتر بود (0.05>P). غلظت اسیدهای چرب غیر استریفیه و همچنین بتاهیدروکسی بوتیرات در بین تیمارها تفاوتی نداشت و آنزیم ­های کبدی تحت تأثیر تیمارهای آزمایشی قرار نگرفتند. اما شاخص حساسیت به انسولین در تیماری که مکمل پیش­ساز قندی استفاده شده بود نسبت به شاهد پایین­تر بود (0.05>P). به طور خلاصه، بر پایه میزان مصرف ماده خشک در گاوهای تازه­ زا، ارائه منبع قندی به صورت یک روز در میان (ناپیوسته) قابل توصیه می­باشد اما با این وجود نیاز به مطالعه ­های بیشتر در این زمینه می­باشد. Manuscript profile -
Open Access Article
121 - Effect of Tempol in Sasaki Diluent on the Quality and Fertility of Cryopreserved Chicken Semen
M. Shanmugam R.K. Mahapatra -
Open Access Article
122 - Effect of Different Levels of Chromium Methionine Supplementation on Growth Performance, Meat Oxidative Stability and Ruminal Metabolites of Male Goat Kids
A. Emami A. Zali M. Ganjkhanlou A. Hozhabri A. Akbari Afjani -
Open Access Article
123 - Lipid Oxidation in M. longissimus dorsi and M. semimembranosus in Lambs Reared Indoors and on Pasture
T. Popova Marinova Marinova -
Open Access Article
124 - تأثیر مکملسازی گلوتامین، بر عملکرد رشد و وضعیت آنتیاکسیدانی در جوجههای گوشتی درگیر با سندرم افزایش فشار خونی ریوی (آسیت)
M. Fathi T. Tanha M. Daneshyarمطالعه حاضر با تأکید بر توان دفاعی گلوتامین بر وضعیت آنتیاکسیدانی پلاسما و کبد، تغییرات سطوح پراکسیداسیون چربی(MDA)، وضعیت آنتیاکسیدانی کل پلاسما (TAS) و فعالیت آنزیمهای آنتیاکسیدان (SOD) و آنزیم وابسته به گلوتاتیون (GPX) در پلاسما و کبد جوجههای گوشتی در گیر با سند Moreمطالعه حاضر با تأکید بر توان دفاعی گلوتامین بر وضعیت آنتیاکسیدانی پلاسما و کبد، تغییرات سطوح پراکسیداسیون چربی(MDA)، وضعیت آنتیاکسیدانی کل پلاسما (TAS) و فعالیت آنزیمهای آنتیاکسیدان (SOD) و آنزیم وابسته به گلوتاتیون (GPX) در پلاسما و کبد جوجههای گوشتی در گیر با سندرم آسیت، انجام شد. نمونه برداری از خون و بافت کبد در روزهای 21 و 42 انجام شد. در پایان آزمایش، از هر قفس، 2 جوجه، به طور تصادفی انتخاب شده و بعد از کشتار، قبل آنها برداشته شد و بطن راست و بطن چپ از ناحیه سپتوم، جدا گشته و نسبت بطن راست به کل بطنها (RV/TV)، نیز محاسبه گشت. میانگین خوراک مصرفی، افزایش وزن حاصله و ضریب تبدیل غذایی نیز به طور هفتگی، از روز 15، اندازهگیری شدند. نتایج نشان داد که، مکملسازی گلوتامین سبب بهبود ضریب تبدیل غذایی شد (05/0P<). علاوه بر این، مکملسازی گلوتامین در پرندگان آسیتی، سبب کاهش معنیدار MDA در پلاسما و بافت کبد گشت. همچنین، گلوتامین، سبب افزایش هم زمان فعالیت آنزیم GPX در پلاسما و بافت کبد شد. فعالیت آنزیم SOD در پلاسما و کبد، به طور معنیداری تحت تأثیر گلوتامین قرار نگرفت (05/0P>). علاوه بر این، مکملسازی گلوتامین، سبب کاهش معنیدار تلفات آسیتی و RV / TV شد. Manuscript profile -
Open Access Article
125 - Effects of salinity on antioxidant system in ten grape genotypes.
Nayer Mohammadkhani Nasser Abbaspour -
Open Access Article
126 - 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
127 - Improving Physiological Quality of Cut Tuberose (Polianthes tuberosa cv. Single) Flowers by Continues Treatment with Humic Acid and Nano-Silver Particles
Majid Amani Beni Abdolla Hatamzadeh Ali Nikbakht Mahmud Ghasemnezhad Mohammad ZarchiniTuberose (Polianthes tuberosa L.) is an important commercial cut flower that has a short vase life. An experiment was carried out by using five different levels of humic acid (HA) (0, 25, 50, 75, and 100 mg L-1) and seven different levels of silver nano-particles (SNP) MoreTuberose (Polianthes tuberosa L.) is an important commercial cut flower that has a short vase life. An experiment was carried out by using five different levels of humic acid (HA) (0, 25, 50, 75, and 100 mg L-1) and seven different levels of silver nano-particles (SNP) (0, 0.5, 1, 2, 3, 4 and 5 mg L-1) mixed with 1.5% sucrose on cut tuberosa cv. Single flower. The loss of fresh weight on third and sixth days in 25 mg L-1 HA+1.5% sucrose, 50 mg L-1 HA +1.5% sucrose and 75 mg L-1 HA+1.5% sucrose was less compared to other treatments. Also HA decreased lipid peroxidation. Silver nano-particles increased the water uptake, fresh weight, total protein, and declined lipid peroxidation compared to the control. Results showed that suitable levels of HA and SNP lead to better morphological and physiological properties and increase the vase life of cut Tuberose flower. Manuscript profile -
Open Access Article
128 - The effect of methanol extract of Lippia citrodoria in the prevention and control of IBD induced by acetic acid in mice
maryam teimouri Fariba KhosravinejadInflammatory bowel disease (IBD) is a chronic condition of the intestine with unknown etiology involving multiple immune, genetic and environmental factors. We were interested to examine the effect of extract from Lippia citrodoria, a medicine plant in prevention and co MoreInflammatory bowel disease (IBD) is a chronic condition of the intestine with unknown etiology involving multiple immune, genetic and environmental factors. We were interested to examine the effect of extract from Lippia citrodoria, a medicine plant in prevention and control of experimental mouse IBD. L.citrodoria was administered (50, 150.200 mg/kg) through drinking water to IBD mice (induced by intrarectal administration of acid-induced). Prednisolone was used as the standard drug for comparison. Biochemical, macroscopic and microscopic examination of colon were performed. Biochemical evaluation of inflamed colon was done using assay of myeloperoxidase (MPO) activity and thiobarbituric acid reaction substances(TBARS) concentration as indicators of free radical activity and cells lipid peroxidation. Results indicated that the activity of MPO and lipid peroxidation products (TBARS) increased in acetic acid-treated group while recovered by pretreatment of animals with L.citrodoria (50,150,200 mg/kg) and prednisolone. L.citrodoria (50-100mg/kg) and prednisolone. L.citrodoria (50-200 mg/kg) and prednisolone-treated groups showed significantly lower score values of macroscopic and microscopic characters when compared to the acetic acid – treated group. The benefical effect of L.citrodoria ( 200mg/kg) was comparable to that of prednisolone.It is concludes that the antioxidant, antimicrobial, and anti-inflammatory potentials of L.citrodoria might be the mechanisms by which this extract protects animals against experimentally induced IBD. Proper clinical investigation should be carried out to confirm the activity in human Manuscript profile -
Open Access Article
129 - Microwave-assisted synthesis of nickel-copper nanocomposite for methanol electrocatalytic oxidation. An efficient anode material for alcohol fuel cell applications
محمد علی کامیابی Babak JalilianIn this study, the synthesis and application of bimetallic nickel-copper nanocomposites and reduction of graphene oxide simultaneously using microwaves are reported. The proposed synthesis method is a simple, fast and controllable process. The electrochemical behavior o MoreIn this study, the synthesis and application of bimetallic nickel-copper nanocomposites and reduction of graphene oxide simultaneously using microwaves are reported. The proposed synthesis method is a simple, fast and controllable process. The electrochemical behavior of the synthesized catalyst was investigated for methanol oxidation reaction (MOR) in alkaline medium. The effect of melamine on the electrocatalytic activity of the synthesized catalyst was studied by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) methods. Also, investigating the effect of melamine as a source of nitrogen leading to nitrogen doping in the reduced graphene oxide network showed that it partially leads to the formation of NiCu-N structures. And this metal-N bond increases the catalytic activity towards MOR. The promoting effect of melamine was proved by an increase of 203 μA in the current and a decrease of 20 mV in the onset potential compared to other synthesized control catalysts during MOR activity. The results indicate the excellent performance of the synthesized catalyst as an anode in a direct methanol fuel cell. Manuscript profile -
Open Access Article
130 - A review of Superclaus process catalysts for sulfur recovery
Sedigheh Sadegh Hassani raheleh saeedi rad elham yagoubpour ali chesheh roshan sepehr sedighi maryam mashayekhiHydrogen sulfide is a by-product of processes related to fossil fuels (such as natural gas and crude oil). Selective oxidation of hydrogen sulfide process (superclaus) following the claus process used to convert residual hydrogen sulfide to sulfur and plays a major role MoreHydrogen sulfide is a by-product of processes related to fossil fuels (such as natural gas and crude oil). Selective oxidation of hydrogen sulfide process (superclaus) following the claus process used to convert residual hydrogen sulfide to sulfur and plays a major role in controlling and reducing pollutant gases. The catalysts used in this process play a very important role in the production efficiency of elemental sulfur and various materials can be used as catalysts to decrease hydrogen sulfide. These catalysts have specific surface area, porosity, mechanical resistance, particle size distribution, acidity, and other special properties that distinguish them for converting hydrogen sulfide to sulfur. In this study, different types of catalysts that used in the superclaus process are investigated. In this regard, support based catalysts including metal oxides, carbon compounds, zeolites and clays supports as well as supportless catalysts including metal oxides, iron, and vanadium in the selective oxidation of hydrogen sulfide to sulfur are investigated. Manuscript profile -
Open Access Article
131 - Degradation of p-nitrophenol (PNP) in aqueous media by tungsten oxide-based photocatalyst using visible light
فاطمه هدایتی نسب علیرضا زارعی هادی رضایی وحیدیانPara-Nitrophenol (PNP) as a nitroaromatic matter is a hazardous pollutant in industrial wastewaters. In this paper degradation of the pollutant was performed by the catalysts of CuWO4/CuO, Na0.01WO3, and WO3 under visible light. The catalysts were synthesized by hydroth MorePara-Nitrophenol (PNP) as a nitroaromatic matter is a hazardous pollutant in industrial wastewaters. In this paper degradation of the pollutant was performed by the catalysts of CuWO4/CuO, Na0.01WO3, and WO3 under visible light. The catalysts were synthesized by hydrothermal method and the process was performed in a suspension reactor equipped with a metal halid lamp (400 W). The synthesized catalysts were characterized using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), and Diffuse reflection spectroscopy (DRS). The effective parameters of pH, reaction temperature, and light intensity have been studied. The results showed that using [Catalyst] = 2000 ppm, [PNP] = 20 ppm, T = 25 °C, and pH = 12 after 240 min, the degradation efficiency for WO3, Na0.01WO3, and CuWO4/CuO obtained about 40%, 42.3%, and 30%, respectively. Manuscript profile -
Open Access Article
132 - Spent caustic wastewater treatment of petrochemical units by wet air oxidation process
اسما مرتضویان حمیدرضا مرتهب مرتضی مافیWet air oxidation (WAO) is an efficient way to treat industrial wastewaters. In present study, wet air oxidation process was used for treatment of spent caustic effluents from ethylene unit in the petrochemical industry. After analysis and determination of wastewater pr MoreWet air oxidation (WAO) is an efficient way to treat industrial wastewaters. In present study, wet air oxidation process was used for treatment of spent caustic effluents from ethylene unit in the petrochemical industry. After analysis and determination of wastewater properties, the process was performed using an experimental set-up having 1-L reactor in the temperature range of 170-200 ̊C and 6-9 bar partial pressure of oxygen. The effects of parameters including liquid volume, temperature, and pH were investigated. Performing experiments in two liquid volumes of 200 and 400 mL confirmed that required oxygen is provided at 190 ̊C and changing the partial pressure of oxygen has no significant effect on process efficiency due to abundant oxygen in the reactor. The values of reduction in chemical oxygen demands (COD) after 3 h at temperatures of 170, 190, and 200 C were 61, 63, and 67%, respectively. The process at 200 ̊C and pH of 12 and 10 for 3 h could decrease 69 and 82% of COD, respectively. Applying homogenous Fe3+ and Cu2+ catalysts could not enhance the performance of the process significantly. Furthermore, the kinetics of two-stage reactions of wet air oxidation process was also studied and the kinetic constants and activation energies were determined. Since the real sample from a petrochemical unit was used, determination of optimum operation conditions, investigation on the effect of catalyst, and also determination of kinetic degree of wet air oxidation reaction for spent caustic wastes of petrochemical units might be considered as the novelties of the current study. Manuscript profile -
Open Access Article
133 - خصوصیات فیلم اکسید تشکیل شده روی فولاد Ck45 با استفاده از روش اکسیداسیون الکترولیتی پلاسما
S. Abuali Galedari م. موسوی خوئی -
Open Access Article
134 - The effect of various parameters on the Jarosite formation in bioleaching of Sarcheshmeh copper mine sulfide ores
Bahman Nazari Hadi Hani Esmaeil Jorjani Zahra ManafiAbstract: Background and Objective: Jarosite is one of the limiting factors for recovery of copper from copper sulfide minerals. This study aimed to evaluate the influence of concentration of ferrous sulfate, pH and temperature on the jarosite formation during the sulf MoreAbstract: Background and Objective: Jarosite is one of the limiting factors for recovery of copper from copper sulfide minerals. This study aimed to evaluate the influence of concentration of ferrous sulfate, pH and temperature on the jarosite formation during the sulfide ore bioleaching of Sarcheshmeh copper mine. Material and Methods: In this study, samples were collected from the depot crushing heap bioleaching site of Sarcheshmeh Copper Mine. The bioleaching experiments were performed in 500 ml flasks, containing 10% solids of sulfide ore (w/v), pulp (200 ml), the 9K culture medium, bacteriainoculation (10% v/v of Acidithiobacillus ferrooxidans). The flask were shaked at 130 rpm throughout incubation. Results: Our results showed that increase in pH and concentration of ferrous sulfate facilitate rate of ferric iron precipitation. Maximum precipitation rate of ferric was achieved in 50 g/l of sulfate concentration, temperature 32 ° C and pH 2/2. According to XRD and FTIR analysis of Bioleaching residue, the produced ferric precipitations are often potassium and ammonium jarosite. Conclusion: With regard to the optimal conditions in this study in terms of pH, temperature and concentration of ferrous sulfate it is possible to regulate Jarosite formation through bioleaching process and to increase the production of copper efficiency from copper sulfide ores. Manuscript profile -
Open Access Article
135 - Separation and molecular identification of Rhodobacter sphaeroides from anaerbic lagoon of wastewater treatment system
Majid Moghbeli Mohammad Reza Shafaati -
Open Access Article
136 - Effects of sulfur, vermicompost + Thiobacilus bacteria on some chemical properties of calcareous soil and phosphorus use efficiency of black seed
S.M. Seiedi P. Rezvani Moghadam M. Khaje Hosseini حمید شاهندهIn order to investigate the effects of increasing soluble phosphorus on seed production and phosphorus use efficiency of black seed (Nigella sativa L.) in a calcareous soil, a greenhouse experiment with three replications was conducted at Faculty of Agriculture, Ferdows MoreIn order to investigate the effects of increasing soluble phosphorus on seed production and phosphorus use efficiency of black seed (Nigella sativa L.) in a calcareous soil, a greenhouse experiment with three replications was conducted at Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. A complete randomized design was used based on factorial arrangement. The fertilizer resources (control, vermi compost, sulfur, vermicompost + sulfur, vermicompost + Thiobacilus bacteria, sulfur + Thiobacilus bacteria and vermicompost + sulfur + Thiobacilus bacteria) and three levels of phosphorus (0, 30 and 60 kg.ha-1) were the first and second experimental factors, respectively. Sulfur + Thiobacilus bacteria and vermicompost + sulfur + Thiobacilus bacteria significantly decreased soil pH (by 0.85 and 0.80) and increased EC and available phosphorus of soil (more than 2.5 times), respectively. in condition of no phosphorus application, sulfur or sulfur + Thiobacilus bacteria had significantly effects on increasing the soil available phosphorus. Vermicompost + sulfur + Thiobacilus bacteria had the highest total plant dry weight and seed weight per plant. However, the lowest phosphorus uptake efficiency (15.31%) was observed in control treatment. In a calcareous soil, sulfur application individually or in combination with vermicompost treatment can be suitable approach in decreasing the problems caused by applying of chemical phosphorus fertilizers. Manuscript profile -
Open Access Article
137 - Study the effect of salinity stress on antioxidant enzymes activity and indicators oxidative stress in weeds Redroot Pigweed (Amaranthus retroflexus L.), Bindweed (Convolvulus arvensis L.) and Russian Knapweed (Acroptilon repens L.)
V. Enaiati E. Esfandiari A. Pourmahammad K. Mohammadnia اصغر RahimiWaiver of noticeable weeds injuries on crop yield, so far has not been studied the effects of salinity on behavior physiological and biochemical. In order to weeds redroot pigweed, Bindweed and Russian knapweed choice and the effects of three levels of salinity control MoreWaiver of noticeable weeds injuries on crop yield, so far has not been studied the effects of salinity on behavior physiological and biochemical. In order to weeds redroot pigweed, Bindweed and Russian knapweed choice and the effects of three levels of salinity control (0), 50 and 100 mM, in a randomized complete block design with 4 replications in a greenhouse were studied. The results showed that levels of salinity only on dry weight was not significant in the bindweed. Moreover the superoxide dismutase (SOD) activity in salinity decreased in Redroot Pigweed and Russian Knapweed weeds, but its activity was not affected in bindweed of salinity. Also, the results of assay activity removal enzymes of hydrogen peroxide showed that this enzymes did not affect only the bindweed of salinity. Whereas in Russian knapweed the activity this enzyme was significantly reduced. In Redroot pigweed also only enzyme Ascorbate peroxidase (APX) activity was reduced by salinity. In studied weeds the salinity had not effect activity of the glutathione S- transferase (GST) enzyme. On the other hand, the amount of hydrogen peroxide (H2O2) in the three studied weeds significantly increased on salinity of 100 mM. But increase the rate of lipid peroxidation at effect salinity observed only in Russian knapweed and redroot pigweed. Based on the results due to the lack of significant changes in antioxidant enzymes at bindweed, this plant is tolerant to salinity levels investigated compared to Russian knapweed and redroot pigweed. Manuscript profile -
Open Access Article
138 - The Effect of Thermal Pretreatment and Packaging Conditions on the Shelf-life of Walnut Kernels
Seyedhamidreza Ziaolhagh Hamed Fatemian Farzad Goodarzi -
Open Access Article
139 - The Effect of Spirulina Algae Enrichment on the Quality of Pistachio Butter
Ahmad Shakerardekani Farzaneh Etemadi -
Open Access Article
140 - Novel Bio-nanopackaging Based on Polylactic Acid/Roselle Calyx Extract/ to Enhance Quality of Hazelnut
Narmin Nabeghvatan Sahar Kabiri Neda Sadat Aghayan Somayyeh Farhang Holighi Davoud Jafarzadeh Rose LesonActive biodegradable films prepared from polylactic acid (PLA)/roselle calyx extract (RCE)/Zinc Oxide Nanorod (ZnO-N) were fabricated as natural packaging materials for hazelnuts protection against microbial contamination and lipid oxidation. The PLA active films with Z MoreActive biodegradable films prepared from polylactic acid (PLA)/roselle calyx extract (RCE)/Zinc Oxide Nanorod (ZnO-N) were fabricated as natural packaging materials for hazelnuts protection against microbial contamination and lipid oxidation. The PLA active films with ZnO-N (1, 3, and 5% w/w), and roselle calyx extract (0.5 g) were made by the casting solution technique. The fungal, microbial, chemical, and sensory properties of hazelnuts were measured during 9 months of conservation at 4°C. On the 6 and 9th months, moisture content was evaluated as %2.6 and 2.2% in the control sample whereas the moisture content of hazelnuts was measured as 3.6% and 2.9% packaged with PLA/RCE/%5 ZnO-N. At the last of experiments, the peroxide value (PV) was measured as 0.91 meq O2 kg-1 packaged with neat biocompatible films, whereas PV value was detected as 0.65 meq O2 kg-1 in packaged hazelnuts with %5 ZnO-N. Total microbial count ranged between 4.9 cfu g-1 for hazelnuts packaged with neat PLA and 3.7 cfu g-1 for hazelnuts specimens packaged with %5 ZnO-N after 9 months of storage. At 9 months, by increasing the level of ZnO-N from 1% to 5%, the mold count was reduced from 3.64 to 3.01 CFU g-1. The fungal contamination in the neat specimens was 3.95 CFU g-1. Sensory quality indicated that hazelnuts with ZnO-N had a significant impact on flavor and aroma, and the highest quality of sensory evaluation was related to hazelnuts packaged with PLA/5% ZnO-N/RCE. Flavor and aroma indices of hazelnuts packaged with %5 ZnO-N reached 3.5 and 4.5 respectively after 9 months of storage. The obtained findings indicate that biopackaging could be utilized to enhance microbial quality and inhibit oxidation reactions of hazelnuts during cold storage. Our results could be beneficial for introducing attractive characteristics to the biodegradable film packaging for example active film containing anthocyanin/nanofiller and can be applied when selecting a smart packaging for detection of food spoilage. Manuscript profile -
Open Access Article
141 - The Effect of Roselle Calyx Extract and Nano-ZnO Biofilm on Walnut's Chemical and Sensory Properties
Neda Sadat Aghayan Maede Sadat Abbasi Anna Etemadi Razlighi Atousa Kokabian Neda Fallah Grace Morine -
Open Access Article
142 - Kinetic study of cis-polybutadiene epoxidation by using 1HNMR spectroscopy in buffered oxone® solution with tetra-n-butyl ammonium bromide as phase transfer catalyst (PTC)
Farzaneh Hossein Poor Rajabi Mir Mohammad Alavi Nikje Bahman Vasheghani Farahani Narges Sabouri -
Open Access Article
143 - Selective oxidation of primary alcohols to aldehydes with H5IO6/V2O5 in ionic liquid
Ming Lu Xiaobing Liu Yu Wang -
Open Access Article
144 - Microwave assisted oxidation coupling of thiols to symmetrical disulfides with tripropylammonium fluorochromate (VI) (TPAFC)
Mohammad Kazem Mohammadi Neda Hasanzadeh Shahriare Ghammamy -
Open Access Article
145 - Oxidative coupling of thiols to disulfides in solution radiation with Trimethylammonium Fluorochromate(VI), [(CH3)3NH[CrO3F], on Silica Gel
Shahriar Ghammamy -
Open Access Article
146 - A numerical study of supercritical water oxidation of phenol
Majid Bazargan Maryam Akbari -
Open Access Article
147 - Kinetic study of unsaturated ketones epoxidation with hydrogen peroxide through the inverse phase transfer catalysis and effect of ultrasonic waves in this epoxidation
Mohammad Taghi Taghizadeh Tahere Shaidaii Narges Sabouri -
Open Access Article
148 - Photochemical degradation of azure-b with sulphate radical ion generated by peroxydisulphate ion with cupric ion
Kumud Intodia Niharika Kataria Anil Kumar -
Open Access Article
149 - Study of Stability and Dispersibility of Oxidized Multiwall Carbon Nanotube and Characterization with Analytical Methods for Bioapplication
Kopaieemalek S. Yusof A.M., Abdul Rashid N.A, Abbasi M.J., and Kopaiee Malek T. -
Open Access Article
150 - Evaluation of Antioxidant Activity of Fennel (Foeniculum vulgare) Seed Extract on Oxidative Stability of Olive Oil
Sh. Chang A. Bassiri H. Jalali -
Open Access Article
151 - Investigation of adding Cr2O3 on mechanical properties and high temperature oxidation behavior of Stellit6 coating prepared by plasma spraying on IN-738
mostafa tahari Mohammad Gavahian Mohammad Jahanbaze Mohammad NajafiIn this study, the effect of adding chromium oxide on mechanical properties and high temperature oxidation behavior of thermal sprayed stellite 6 coating on IN-738 has been investigated. For this purpose, first the 0, 10, 20 and 30 %wt. Cr2O3 powder added to satellite6 MoreIn this study, the effect of adding chromium oxide on mechanical properties and high temperature oxidation behavior of thermal sprayed stellite 6 coating on IN-738 has been investigated. For this purpose, first the 0, 10, 20 and 30 %wt. Cr2O3 powder added to satellite6 and plasma sprayed on the IN_738 substrate after mixing by mechanical milling. The optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffractometer (XRD) and micro-hardness used for micro-structure, porosity and phase analysis investigation. The isothermal oxidation behavior of composite coatings at 650, 750 and 850 ° C for 50 hours were evaluated. Results shows, the stellit6 / %10wt. Cr2O3 coating has the lowest oxidation rate. On the other hand, this coating shows the higher hardness other than non-reinforcement coating. The phase analysis investigation shows that the Cr2O3 oxide layer is forms during oxidation process on the surface of coatings. Its shows the Cr2O3 reinforcement is preferred areas for chromium oxides in thermal grown oxide (TGO) during oxidation Manuscript profile -
Open Access Article
152 - Investigation of the electrochemical activity of paladium-carbon nanotubes nanocomposite toward methanol oxidation in fuel cells and comparing it with the platinium one
Roghayeh KhaleghianmoghadamIn this study, the nanocomposite of palladium-carbon nanotubes-chitosan was synthesized and characterized by XRD and TEM techniques. The synthesized nanocomposite was used for the modification of glassy carbon electrods surfaces. Using cyclic voltammetry (CV) technique, MoreIn this study, the nanocomposite of palladium-carbon nanotubes-chitosan was synthesized and characterized by XRD and TEM techniques. The synthesized nanocomposite was used for the modification of glassy carbon electrods surfaces. Using cyclic voltammetry (CV) technique, the electrochemical activity of modified electrode (GC/PdNPs-MWCNTs-CH) toward methanol oxidation was investigted in a solution of 0.5 M sodium hydroxide and 1.0 M methanol. The results revealed that the synthesized nanocomposite shows a high catalytic activity toward methanol oxidation and thus has an efficiency for use as anode for the methanol fuel cells. The effects of different parameters such as methanol and electrolyte concentrations, potential range, and potential scan reate on the anodic current density and the peak potential of methanol oxidation were also investigted. Moreover, comparing the electrochemical activity of the palladiun nanocatalyst for methanol oxidation with that of the platinum-type, it was concluded that the former has a considerable activity closed to the platinum one. Therefore, it coulde be a souitable substituer for platinum in the methonl oxidation process. This substitution, also reduces the catalyst price. Manuscript profile -
Open Access Article
153 - Investigation on effect of Hafnium addition on electrical and isothermal oxidation resistance of Ni-super alloy using for metallic interconnect of SOFC
dannial azimi- yancheshmeh Mohammad Esmailian Kourosh ShirvaniNi-Cr-Al-Hf alloys containing 0, 0.1, 0.2 and 0.4 wt.% Hf were produced and their isothermal oxidation behavior and electrical resistance has been investigated in air for 75 h at the temperature of 1000 °C. Microstructures of the oxidized samples were examined using MoreNi-Cr-Al-Hf alloys containing 0, 0.1, 0.2 and 0.4 wt.% Hf were produced and their isothermal oxidation behavior and electrical resistance has been investigated in air for 75 h at the temperature of 1000 °C. Microstructures of the oxidized samples were examined using scanning electron microscopy (SEM) and electrical resistance was measured. The samples showed different microstructures, and oxidation behavior depending on their chemical composition. The results indicated that the sample containing 0.4 wt.% Hf had the lowest weight gain, while the weight gain of the sample without Hf was the highest. An external scale of spinel overlying a region of internal oxides precipitates formed on Ni-12Cr-4.5Al. Conversely, an external Al2O3 formed on the samples containing Hf additions. In absence of Hf, Cr2O3 was the major scale that formed on surface. The improvement in the oxidation resistance is believed to be due to the transition between the internal and external oxidation of aluminum, adherent and protective Al2O3 oxide layer on the surface of the Ni-12Cr-4.5Al-0.4Hf alloy. It was found that the scale adhesion can be affected by mechanical keying at the alloy/scale interface resulting from the pegs’ formation during oxidation. Higher electrical resistance of Alloy without Hf is due to higher thickness of oxide scale formation on surface and sample with 0.4 wt.% Hf showed lowest electrical resistance due to thinner scale of Al2O3. Manuscript profile -
Open Access Article
154 - Optimization of HVOF thermal spraying parameters to improve the oxidation resistance of MCrAlY coating using Response
mostafa tahariIn this research, effects of different coating process parameters on the final properties of thermal spray coatings obtained from HVOF method are investigated. For this aim, five different levels are considered for four effective parameters (Fuel injection rate, oxygen MoreIn this research, effects of different coating process parameters on the final properties of thermal spray coatings obtained from HVOF method are investigated. For this aim, five different levels are considered for four effective parameters (Fuel injection rate, oxygen injection rate, powder injection rate and spray distance) on HVOF process by response surface method (RSM) and minimum porosity and minimum oxidation layer thickness are considered as the responses. To investigate the microstructure of coatings, Thermal Grown Oxide (TGO) thickness and porosity, a Scanning Electron Microscopy (SEM) and image analysis method are applied. Oxidation test has done at1100ºC for 50 hours on coated samples. Results show that (oxygen injection rate and powder injection rate), (fuel injection rate and powder injection rate), (powder injection rate and spray distance) have a reaction on each other in the TGO thickness value. Also, (oxygen injection rate and powderinjectionrate), (fuel injection rate and powder injection rate) have a little reaction on the porosity against the other parameters which haven’t any effect on it. Investigation of the coated sample with optimized parameters reveals that porosity of the coating is about 0.5% and TGO thickness is about 5.3 micrometer. Manuscript profile -
Open Access Article
155 - Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation
Somaye Khammarnia Jilla Saffari Mehri-Saddat Ekrami-Kakhki Alireza AkbariIn this study, polyaniline (PA) accompanied by chitosan (CH) were used as effective and proper support for nanoparticles. LaFeO3 (LFO) nanoparticles were synthesized by sol-gel method and characterized by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy MoreIn this study, polyaniline (PA) accompanied by chitosan (CH) were used as effective and proper support for nanoparticles. LaFeO3 (LFO) nanoparticles were synthesized by sol-gel method and characterized by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) techniques. Pt-LFO/PA-CH nanocatalyst was prepared by chemical reduction of H2PtCl6 by NaBH4 on PA-CH support in the presence of LFO nanoparticles. The morphology and distribution of nanoparticles were determined by transmission electron microscopy (TEM) images. The catalytic activity of Pt-LFO/PA-CH nanocatalyst for methanol electro-oxidation was studied through cyclic voltammetry and electrochemical impedance spectroscopy. The effects of some experimental factors for methanol electro-oxidation, such as methanol concentration, scan rate and temperature were studied on the prepared catalyst. The activation energy of the anodic peak of methanol oxidation at Pt-LFO/PA-CH was also calculated and its value was obtained 14.17 kJ mol-1. The catalytic activity of Pt-LFO/PA-CH catalyst for methanol electro-oxidation was compared with Pt/PA-CH catalyst. The electrochemically active surface area of Pt-LFO/PA-CH catalyst (77.46 m2g-1Pt) was obtained more than Pt/PA-CH (54.69 m2g-1Pt). At methanol concentration of 1.76 M, the anodic peak current density of methanol oxidation at Pt-LFO/PA-CH (377.58 mA cm-2) was obtained more than Pt/PA-CH catalyst (203.67 mA cm-2). Higher electrochemically active surface area and current density of Pt-LFO/PA-CH for methanol oxidation indicating very improved catalytic activity of Pt-LFO/PA-CH for methanol electro-oxidation. Thus, the prepared catalyst can be utilized as effective catalyst for methanol electro-oxidation in direct methanol fuel cells. Manuscript profile -
Open Access Article
156 - Investigating the oxidation and electrical behavior of AISI 304 steel coated with cobalt for the application of solid oxide fuel cell
Mohammad Reza Ashorzadeh Morteza Zandrahimi Hadi EbrahimifarOxidation resistance and electrical conductivity of stainless steels used as interconnects in solid oxide fuel cells can be improved by using a conductive and protective coating layer. In this study, AISI 304 austenitic stainless steel was coated in a cobalt powder base MoreOxidation resistance and electrical conductivity of stainless steels used as interconnects in solid oxide fuel cells can be improved by using a conductive and protective coating layer. In this study, AISI 304 austenitic stainless steel was coated in a cobalt powder base pack mixture. Isothermal oxidation test was used to investigate the oxidation resistance of coated and non-coated steel. Area specific resistance (ASR) was also measured as a function of oxidation time at 800 °C. Microstructure of coated and oxidized samples was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD) device. The results showed that cobalt coated samples showed better oxidation resistance than non-coated samples. The results showed that increasing the temperature would increase the area specific resistance. The cobalt coating layer also converted to CoFe2O4, Co3O4 and CoCr2O4 spinels during the isothermal oxidation process. Cobalt spinels exhibited less ASR (27.4 mΩ cm2) compared to the uncoated sample (60.5 mΩ cm2). Manuscript profile -
Open Access Article
157 - Effect of Filler Metal on the Oxidation Resistance of 35Cr-45Ni Alloy Weld Metal
Esmaeel Ahmadizadeh Reza Derakhshandeh Haghighi Amin Rabiezadeh Shiva MansourzadehIn this study the effect of UTP 2535 Nb and UTP 3545 Nb filler metals on the microstructure and oxidation resistance of the weld metal of GTAW welded 35Cr-45Ni alloy have been investigated. According to the results, microstructure of the weld metals includes Cr and Nb C MoreIn this study the effect of UTP 2535 Nb and UTP 3545 Nb filler metals on the microstructure and oxidation resistance of the weld metal of GTAW welded 35Cr-45Ni alloy have been investigated. According to the results, microstructure of the weld metals includes Cr and Nb Carides precipitating along the grain boundaries of austenitic matrix. Weld metal of the sample welded with UTP 3545 Nb filler metal showed denser and more continuous carbides which arises from higher Cr content in this filler metal. According to the XRD analysis of the oxidized weld metals at 1000 ℃ for 96 h, all samples represent an external oxide layer, mostly consist of Cr oxide and an internal oxide layer, mostly composed of Si oxide. Weld metal of the sample welded with UTP 2535 filler metal showed the highest weight gain (4.3 mg/cm2) and oxide thickness (20 μm). For the weld metal of the other sample, these values were 3.6 mg/cm2 and 11 μm, respectively. It can be attributed to the higher Cr and Si in the UTP 3545 Nb filler metal. The first element results in a resistant, continuous, and defect free external oxide on the surface, and the latter one leads to formation of a resistant internal oxide, both strongly effective in improving the oxidation resistance of the weld zone. Manuscript profile -
Open Access Article
158 - Investigating of High Temperature Oxidation and Thermal Shock Properties of YSZ/Al2O3 Composite Thermal Barrier Coatings with Alumina Made by Solution Precursor Thermal Spray
Saeid Taghi-ramezani Zia Valefi Naser EhsaniIn this research, a double layer thermal barrier coating was applied and then an alumina diffusion barrier layer was deposited on the YSZ by two solution precersore plasma and solution precersore flame spraying. High temperature oxidation and thermal shock resistance te MoreIn this research, a double layer thermal barrier coating was applied and then an alumina diffusion barrier layer was deposited on the YSZ by two solution precersore plasma and solution precersore flame spraying. High temperature oxidation and thermal shock resistance tests were done at 1100˚C. Microstructure of coatings were studied by optical Microscopy and Field Emission Scanning Electron Microscopy. Comparison of the microstructures of coatings showed that applying of Alumina with the solution precursor flame spray process upgrades the thermal properties. High temperature oxidation and thermal shock resistance of YSZ/Al2O3 coatings with Alumina applied by the solution precersoure thermal spray with the same compound were studied. Findings showed that applying alumina with the solution precursor flame spray process leads to increase the amount of the deposited splats and proper contact between them, causes to decrease the diffusion of O2 and as a result TGO thickness decreases and also thermal shock resistance increases. Manuscript profile -
Open Access Article
159 - Comparison of Oxidation and Thermal Shock Properties of YSZ/Nanoal2o3 Composite Thermal Barrier Coatings Made By Plasma Spraying of Un-Pyrolyzed Precursor and Aglomerated Nanocrystalline Alumina Powder
Saeid Taghi-ramezani Zia Valefi Naser Ehsani masud mirjaniIn this research, firstly amorphous Alumina powder was produced by co-precipitation method. Then YSZ/Al2O3 coatings were applied by plasma spraying process in two types of pyrolyzed and crystalline nano-alumina. High temperature oxidation and thermal shock resistance te MoreIn this research, firstly amorphous Alumina powder was produced by co-precipitation method. Then YSZ/Al2O3 coatings were applied by plasma spraying process in two types of pyrolyzed and crystalline nano-alumina. High temperature oxidation and thermal shock resistance test were done at 1100˚C. Microstructure and phase analysis of coatings were studied by optical and electron microscopes and XRD method. Comparison of the microstructure of coatings showed that the use of crystalline nano-alumina powder in the YSZ/Alumina layer composite upgrades the thermal properties. High temperature oxidation and thermal shock resistance of plasma sprayed YSZ/Al2O3 with un-pyrolysed nano-alumina and coatings with same composition with crystalline nano-alumina to created by plasma spraying were studied. Findings showed that the use of un-pyrolyzed nano-alumina powder in YSZ/Al2O3 layer composite resulted in increased porosity and shrinkage cavities in the coating, which increased the diffusion of O2 that causes the TGO growth rate. Also, high density and proper contact between the splats made of crystalline nano-alumina powder results in higher resistance of thermal cycles. Manuscript profile -
Open Access Article
160 - Comparison of microstructure and high-temperature oxidation resistance of NiCrAlY coatings formed by atmospheric plasma spraying (APS) and solid shielding shrouded plasma spraying (SSPS)
Reza Saharkhiz Zia Valefi Masoud Mirjani Saied Taghi-RamezaniIn this research, NiCrAlY powder was applied on steel, and Hastelloy X substrates with solid shielding shrouded plasma spray (SSPS) process and compared with atmospheric plasma spraying (APS). The high-temperature oxidation test was also performed on the coatings, and t MoreIn this research, NiCrAlY powder was applied on steel, and Hastelloy X substrates with solid shielding shrouded plasma spray (SSPS) process and compared with atmospheric plasma spraying (APS). The high-temperature oxidation test was also performed on the coatings, and the microstructure of coatings was studied by optical microscopy (OM) and scanning electron microscopy (SEM). To investigate the influence of the SSPS process on the properties of metallic coatings, variable parameters; such as type of shroud gas (Ar, H2), the gas injection method (internal, external or simultaneous) and the flow rate of that, were examined. During the use of shroud gas, the temperature of the plasma jet has increased significantly. The oxidation test results showed the proper performance of NiCrAlY coating under the protection of argon internal shroud gas with a flow rate of 75SLPM, which was able to perform the best plasma flame protection during spraying. It can lead to a reduction in oxide and porosity of coating up to 8%. Also, the lowest thermally grown oxide (TGO) thickness was obtained for this sample after 200 hours of oxidation, indicating its excellent performance in maintaining the Al for the formation of the continuous α-Al2O3 layer during high-temperature oxidation. Manuscript profile -
Open Access Article
161 - Comparison of Isothermal Oxidation and Thermal Shock Properties of CoNiCrAlY Coating Sprayed by Atmospheric Plasma Spray and Nitrogen Gas Shrouded Plasma Spray Methods
Behzad Ghasemi Zia Valefi Saeid Taghi-ramezaniIn this research, the properties of the coating applied by conventional plasma spray and with inert gas shroud has been studied and compared, in the way that nozzle like part attached to plasma gun in order to protect the plasma jet by exiting nitrogen from the nozzle. MoreIn this research, the properties of the coating applied by conventional plasma spray and with inert gas shroud has been studied and compared, in the way that nozzle like part attached to plasma gun in order to protect the plasma jet by exiting nitrogen from the nozzle. The Microstructural characterization of the coatings was performed by optical microscope and scanning electron microscope equipped with energy dispersive spectroscope. Hardness of coatings is also measured by Vickers method under the applied load of 30 gram-force. Isothermal oxidation and thermal shock tests are done at 1000 and 950ºC respectively. Post-spray results show that the use of nitrogen gas shroud is useful and coating achieved by nitrogen shroud has less oxide and porosity and has more homogeneous structure. Results from isothermal oxidation show that TGO layer growth rate in the specimen sprayed by nitrogen shroud is less. Thermal shock test shows that the specimen sprayed by nitrogen shroud has more resistance against thermal shock due to layer by layer and regular growth of TGO and having less oxide and porosity in comparison with the same specimen sprayed without nitrogen shroud. Also, the microhardness of sprayed coating without nitrogen shroud was 35 Vikers more than the applied coating with nitrogen shroud. Manuscript profile -
Open Access Article
162 - Effect of Graphene Oxide Addition on the Behavior of Tribological Properties of Coatings Prepared on Magnesium Alloy AZ31 by Plasma Electrolytic Oxidation Method
sadeq esmaili Tahmineh Ahmadi Hamid Reza Bakhsheshi-Rad Amirabbas NoorbakhshIn this study, the effect of adding graphene oxide on the terbiological behavior of coatings created by the electrolytic plasma oxidation process under constant voltage conditions has been investigated. Bipolar waveform coating operation was performed on the surface of MoreIn this study, the effect of adding graphene oxide on the terbiological behavior of coatings created by the electrolytic plasma oxidation process under constant voltage conditions has been investigated. Bipolar waveform coating operation was performed on the surface of AZ31 magnesium alloy for 10 minutes. The results showed that the surface morphology of the coatings had micro-cavities known as pancake structure and volcanic crater on the surface, the diameter of which increased with the addition of graphene oxide. Fuzzy analysis of coatings showed that the coatings are composed of oxide phases of forsterite and periclase. The wear mechanism of the coated samples was scratched. Also, the wear resistance of the coating containing graphene oxide additive increased so that the average coefficient of friction for the mentioned samples decreased 10 times compared to the uncoated sample, which is due to the increase in hardness. The hardness of the sample containing graphene oxide has increased about 5 times compared to the magnesium alloy. Magnesium alloy with this coating is a good candidate for orthopedic applications. Manuscript profile -
Open Access Article
163 - Comparative Study of Microstructure, Phase Composition, and Oxidation Resistance of CoNiCrAlY Coating Deposited by HVOF and LPPS processes
pejman zamani moghaddam Zia ValefiIn this research, CoNiCrAlY powder was deposited by high-velocity oxy-fuel (HVOF) and low-pressure plasma spraying (LPPS) processes on IN738 nickel-based superalloy substrates. The high-temperature oxidation test was performed on the coatings at a temperature of 1050 ̊C MoreIn this research, CoNiCrAlY powder was deposited by high-velocity oxy-fuel (HVOF) and low-pressure plasma spraying (LPPS) processes on IN738 nickel-based superalloy substrates. The high-temperature oxidation test was performed on the coatings at a temperature of 1050 ̊C and a time of 200 hours in a muffle furnace. The microstructure and phase composition of the coatings were investigated by SEM and XRD before and after the oxidation test. The porosity (volume percentage) and surface roughness (micrometer) were measured for HVOF coating as 0.6 and 4.4, and for LPPS coating as 2 and 6.62, respectively. The HVOF coating consisted of γ-CoNiCr and β-(Co,Ni)Al, while the LPPS coating included a single phase γ-CoNiCr. The disappearance of the β phase in the LPPS coating after spraying was due to dissolution in the plasma jet and its non-recovery in the conditions of rapid quenching and non-equilibrium solidification. This phase was recovered after heat treatment. The microstructure of the LPPS coating had much less oxide than the HVOF coating due to depositing at low oxygen pressure in the vacuum chamber. After 200 hours of oxidation test, the amount of β phase (as an oxidation resistance criterion) was completely consumed in the LPPS coating, while the HVOF coating contained the retained β deposits. The average thickness of TGO layer for HVOF and LPPS coatings was 5.2 and 7.1 μm, respectively. The dispersed oxides in the microstructure, lower roughness and denser structure of HVOF coating were reasons for the higher oxidation resistance of HVOF coating than LPPS. Manuscript profile -
Open Access Article
164 - The Effects of Symbiotic on Oxidative Stress Reduction in Broilers with Pulmonary Hypertension Syndrome
Hamed Zarei Abbass Fereydoon KolahiPulmonary Hypertension Syndrome (PHS), characterized by increased lung pressure in arteries, dilatation, and hypertrophy of the right ventricle, is correlated with the high cardiac output and enhanced blood pressure in the lungs to more blood oxygenation, which ultimate MorePulmonary Hypertension Syndrome (PHS), characterized by increased lung pressure in arteries, dilatation, and hypertrophy of the right ventricle, is correlated with the high cardiac output and enhanced blood pressure in the lungs to more blood oxygenation, which ultimately leads to ascites. The accumulation of free radicals and increased oxidative stress result in both lipid peroxidation, as well as the increased levels of heterophil to lymphocytes. By having antioxidant properties, the synbiotic can significantly reduce oxidative stress. Therefore, in the present study, we aimed to investigate the therapeutic effects of synbiotic on pulmonary hypertension in broilers. Groups were categorized into; Sham (broilers with a basic diet in the whole period of the test), Control (recipient of basic diet+ triiodothyronine hormone (T3) at 1.5 mg/kg doses added to their diet from seven days of age), Treatment with synbiotic (birds with basic diet + T3 at 1.5 mg/kg dose added to their diet from seven days of age + synbiotic (0.1% dose) from day one). At 35 and 49 days of age, 9 birds from each group (3 broilers from each replicate) were randomly selected, and after getting the blood samples, heterophil to lymphocyte rate and lipid peroxidation was assessed. To evaluate pulmonary hypertension, cardiac weight index was also reported due to the right ventricular weight to the total weight of both ventricles (RV/TV). RV/TV rate at all ages was decreased in the synbiotic broilers; however, this was statistically significant at 49 days of age (p ≤ 0.05). Compared to the control group, lipid peroxidation levels in synbiotic group at all ages were reduced which was significant at 35 and 49 days of age (p < 0.05). Furthermore, Heterophil to lymphocytes rates was decreased in the synbiotic group compared to the control group in all ages, but this decrease was more significant at 49 days of age (p < 0.05). Regarding the obtained results, symbiotic, for their antioxidant properties, can significantly reduce the amount of oxidative stress result from pulmonary hypertension syndrome. Manuscript profile -
Open Access Article
165 - Treatment of Spent Caustic Effluent of Oil Refinery with Catalytic Oxidation and Optimization of Relevant Parameters using Response Surface Methodology
Rogayeh Elmi Amir Farshi arezoo nejaei Mohammad Ebrahim Ramazani Ebrahim Alaie -
Open Access Article
166 - The effect of salicylic acid on some morphological and physiological traits under salinity stress (Catharanthus roseus)
Samaneh Abdolmohammadi Jalal OmidiAbstract: Considering the increasing trend of salinity development and lack of desirable land for agriculture in the world, the use of saline resistant species or the use of compounds that reduce the effects of salinity stress and induction of resistance to stress in pl MoreAbstract: Considering the increasing trend of salinity development and lack of desirable land for agriculture in the world, the use of saline resistant species or the use of compounds that reduce the effects of salinity stress and induction of resistance to stress in plants is very important. Salicylic acid is one of the beneficial compounds for plants, which plays an important role in the resistance of plants to environmental stresses, including salinity stress. To evaluate the potential beneficial effects of salicylic acid on some of the physiological and morphological parameters of an experiment, a factorial experiment was conducted in a completely randomized design with two factors: salinity including sodium chloride at 0, 100 and 150 mM and salicylic acid at two levels 0 and 1 mM with four repeats. At the end of experiment, vegetative traits, chlorophyll a, b, total, carotenoids, starch, sucrose and total protein content were measured after 28 days of treatment. The results of salinity and salicylic acid interaction showed that salinity significantly reduced the weight and dry weight of the shoot, root dry weight and root, root penetration depth, and the height of the forage plant. Salinity of 150 mM significantly reduced the amount of chlorophyll a and b. In addition, the amount of sucrose and starch and protein decreased by salinity. Treatments with salicylic acid increased vegetative traits, sugars, chlorophyll, carotenoids and protein under salinity stress significantly. Manuscript profile -
Open Access Article
167 - Propolis as a natural preservative for frozen fish burgers: A kinetic study of lipid oxidation and microbial growth
محسن مختاریان محسن دلوی Fatemeh KoushkiThe kinetic mechanism of fatty acids or FA degradation and microbial growth rate or MGR in seafood are very important. In this research, the interaction effect of propolis addition (at different concentrations) and storage times on the FA oxidation kinetics and its inhi MoreThe kinetic mechanism of fatty acids or FA degradation and microbial growth rate or MGR in seafood are very important. In this research, the interaction effect of propolis addition (at different concentrations) and storage times on the FA oxidation kinetics and its inhibitory role on the suppression of bacterial/fungi growth of stored FFB at -18°C was evaluated. The FA degradation (or microbial growth) rates in FFB during storage period follows the zero-order kinetics. The lowest growth rate (log10 CFU/g) of total viable count (3.66) and fungi (2.43) of FFB was observed after three-months storage in the P-IV, that corresponded to the lowest degradation rate of peroxide value (k0=0.0462 meq O2/kg oil/day) and the highest sensory evaluation scores. Generally, adding 0.4% propolis to FFB and storing them at -18°C for up to 86 days (as the best shelf life) can effectively prevent lipid oxidation and microbial growth and improve sensory quality. Manuscript profile -
Open Access Article
168 - Investigating the Effect of Changing Plasma Electrolytic Oxidation on the Scratch Degradation of Ti-6Al-4V
M.R. Tavighi A. Rabieifar O. Ashkani A. Asaadi ZahraeiIn this research, plasma electrolytic oxidation (PEO) was prepared at duty voltage of 350 and 450 V and processing time of 5 and 10 minutes on Ti-6Al-4V alloy in Na2SiO3 + KOH electrolyte. Then, the adhesion strength and microstructural degradation of the coating surfac MoreIn this research, plasma electrolytic oxidation (PEO) was prepared at duty voltage of 350 and 450 V and processing time of 5 and 10 minutes on Ti-6Al-4V alloy in Na2SiO3 + KOH electrolyte. Then, the adhesion strength and microstructural degradation of the coating surface were investigated through a constant load scratch test, field-emission scanning electron microscope (FE-SEM), and X-ray diffraction (XRD), respectively. The results showed that while increasing the processing time and duty voltage, the density of porosity and the amount of rutile on the coating surface increased. Meanwhile, microstructure degradations like delamination, gross spallation, and buckling spallation decreased due to increased adhesion strength. This resulted from an increase in voltage and processing time. Manuscript profile -
Open Access Article
169 - Effect of seed deterioration on germination, biochemical and enzymatic activity of buckwheat
آرزو پراور Saeideh Maleki Farahani Shokofeh Gholami To determine the effect of seed deterioration on germination, biochemical and enzymatic activity of buckwheat, an experiment was conducted as factorial based on completely randomized design in Seed Science and Technology Laboratory of Shahed University, Iran. The More To determine the effect of seed deterioration on germination, biochemical and enzymatic activity of buckwheat, an experiment was conducted as factorial based on completely randomized design in Seed Science and Technology Laboratory of Shahed University, Iran. The treatments consisted of ageing duration (non-aging, 2, 4 and 7 days) and seed moisture content (10, 20 and 30%). Parameters such as germination percentage, mean germination time, electrical conductivity, lipid peroxidation and catalase activity were measured. The effect of aging duration, seed moisture content and their interaction on traits were significant. Germination percentage, mean germination time, electrical conductivity, lipid peroxidation, and catalase enzyme activity were significantly affected by aging duration and seed moisture content. The highest germination percentage and catalase enzyme activity in aged seeds was observed during two days with 20% moisture content. Mean germination time, electrical conductivity and lipid peroxidation in aged seeds for seven days was in the highest level in seeds with 30% moisture content. Seed moisture content and aging duration increased the mechanisms involved in seed aging and cell membrane phospholipids affected by deterioration, which increased the electrical conductivity and lipid peroxidation and reduced germination and catalase enzyme activity. To prevent buckwheat seed deterioration in long and short term storage, it is recommended that seed moisture content is kept about 10%. Manuscript profile