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Open Access Article
1 - Response surface methodology analysis of the photocatalytic removal of Methylene Blue using a new Cu(II)-MOF
Zahra Mohseni nik Majid Ramezani Saeed Jamehbozorgi Tahere Momeni EsfahaniA novel metal–organic framework (MOF), with the formula [Cu(II)L]n (L= 4, 4′-diamino diphenyl sulfone), has been synthesized conventionally and hydrothermally methods and characterized by FT-IR, PXRD, EDX, and SEM techniques. The results MOFs were applied for photodegra MoreA novel metal–organic framework (MOF), with the formula [Cu(II)L]n (L= 4, 4′-diamino diphenyl sulfone), has been synthesized conventionally and hydrothermally methods and characterized by FT-IR, PXRD, EDX, and SEM techniques. The results MOFs were applied for photodegradation of Methylene Blue (MB). The influence of affecting variables, such as initial MB dye concentration (2–8mg L−1), Cu(II)-MOF mass (0.01–0.03 mg), pH (3.0–9.0), and time of irradiation (30–90 min). The photocatalytic degradation efficiency was investigated by the central composite design (CCD) methodology. The results of CCD analysis for optimum values of variables revealed that Cu(II)-MOF mass was 0.025g, the initial concentration of MB was 3.51 mg L−1, pH was 4.50 and irradiation time was 75 min.Under the optimum conditions, the photocatalytic MB degradation percentage at the desirability function value of 1.0 was found to be 70%. In addition, the obtained R2 value of 0.97 in the regression analysis showed a high photocatalytic efficiency of the proposed method for MB degradation. Manuscript profile -
Open Access Article
2 - Green synthesis and antibacterial application of silver nanoparticles using Oak Peel extract
Nooshin Japalaghi Nahid Ghasemi Majid Ramezani Behrooz Shojaei saadiThe use of various plant materials for the synthesis of nanoparticles is considered as green synthesis, which does not involve any harmful chemicals. In this study, silver nanoparticles were synthesized by a fast, one-step method and a green biosynthesis method by regen MoreThe use of various plant materials for the synthesis of nanoparticles is considered as green synthesis, which does not involve any harmful chemicals. In this study, silver nanoparticles were synthesized by a fast, one-step method and a green biosynthesis method by regenerating a silver nitrate solution using Oak peel extract containing biomolecule which as a reducing and stabilizing element Suitable to play a role. Effective parameters such as pH of solution, silver nitrate concentration, temperature and contact time were studied and optimized The structure and properties of nanoparticles were determined by spectroscopic absorption analyzes UV-Visible, Scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. According to the Sherer-Debye equation, the size of the nanoparticles was measured 29 nm. Then the antibacterial effect of nanoparticles produced against two strains of pathogenic bacteria, gram positive Staphylococcuas aureus and gram negative Escherichia coli was investigated by disk diffusion and determination of minimum inhibitory concentration(MIC) methods. The results of the antibacterial activities test showed that the nanoparticles produced from Oak Peel had a good effect on both bacteria. The purpose of this research is to synthesis and develop a new method for the preparation of silver nanoparticles using environmental methods. Manuscript profile -
Open Access Article
3 - Preparation of antibacterial nanocomposite cotton fabrics with in situ generated silver and silver oxide nanoparticles by bioreduction using Moringa oliefiera leaf extract
Umamahesh MallavarapuAqueous Moringa Oliefiera (MO) leaves extraction is employed as a reductant to generate silver nanoparticles (AgNPs) and silver oxide nanoparticles (Ag2ONPs) in cellulose fabrics by in situ technique. The biosynthesized nanocomposite cotton fabrics (NCFs) were analysed MoreAqueous Moringa Oliefiera (MO) leaves extraction is employed as a reductant to generate silver nanoparticles (AgNPs) and silver oxide nanoparticles (Ag2ONPs) in cellulose fabrics by in situ technique. The biosynthesized nanocomposite cotton fabrics (NCFs) were analysed by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM) associated Energy Dispersive X-ray (EDX) spectroscopy, Fourier Transform Infrared (FTIR) and Thermogravimetric analysis (TGA) methods. The shape and mean size of AgNPs in NCFs were found to be globular and 82 nm, respectively and their formation in NCFs was established by SEM studies. EDX analysis established the presence of silver metal. The XRD analysis revealed that the obtained silver based nanoparticles were crystalline in nature. The TG and DTG analysis showed that the obtained NCFs were thermally stable. These NCFs exhibited good antibacterial activity against Gram negative (G-ve) Pseudomonas aeruginosa (P. aeruginosa) and Gram positive (G+ve) Staphylococcus aureus (S.aureus) bacteria. The mechanical properties such as modulus, tensile strain and stress of NCFs were also tested, utilizing universal testing machine (UTM). The modulus was found to be 276.4 MPa. These NCFs can be used in medicine for making antibacterial napkins, wound dressing bandage cloth, etc., and as packaging materials. Manuscript profile -
Open Access Article
4 - SYNTHESIS, CHARACTERIZATION AND APPLICATION OF Ni /SiO2 HETEROGENEOUS NANO CATALYST IN OPTIMIZATION OF METHYL ESTER FROM Khaya senegalensis SEED OIL
Mela Yoro Wilson Lamayi Nasiru Pindiga Zaccheus ShehuNi / SiO2 heterogeneous nano catalyst was synthesized and characterized using different analytical tools including FT-IR, UV spectrophotometer, SEM equipped with an energy dispersive X-ray spectrometer (EDX), and XRD. The synthesized catalyst was used in the transesteri MoreNi / SiO2 heterogeneous nano catalyst was synthesized and characterized using different analytical tools including FT-IR, UV spectrophotometer, SEM equipped with an energy dispersive X-ray spectrometer (EDX), and XRD. The synthesized catalyst was used in the transesterification of methyl ester produced from mahogany seed oil. The reaction conditions for the transesterification process were optimized. The yield of 85% was achieved when the reaction was carried using Ni / SiO2 with concentration of 1.5% wt, volume ratio of methanol to oil of 5:1, reaction temperature of 60 °C, and a reaction time of 120 min. The Ni / SiO2 nano catalyst was regenerated from the mixture and was reused for various circles by applying the optimum conditions obtained during the present study. The results showed that the methyl ester yield decreased exponentially by increasing the cycle number when the regenerated catalyst was used. However, good conversion (>72%) was obtained up to the 4th cycles. It could be concluded that Ni / SiO2 nano catalyst is catalytically active and may serve as a potential catalyst for biodiesel production. Manuscript profile -
Open Access Article
5 - Utility of Gold Nanoparticles for Spectrofluorimetric and Spectrophotometric Determination of Ceftobiprole in Dosage form and Biological Fluids
Hesham Salem Mahmoud Omar Dina Zein Deena MokhaterTwo simple, fast and novel delicate fluorimetric and spectrophotometric strategies were examined for the measure of ceftobiprole (CEF) utilizing gold nanoparticles (Au NPs). On spectrofluorimetric strategy, gold nanoparticles were utilized as a fluorescence test. The ex MoreTwo simple, fast and novel delicate fluorimetric and spectrophotometric strategies were examined for the measure of ceftobiprole (CEF) utilizing gold nanoparticles (Au NPs). On spectrofluorimetric strategy, gold nanoparticles were utilized as a fluorescence test. The expansion of CEF to Au-NPs arrangement caused significant quenching of the outflow band of Au-NPs, which was likely due to the complexation of the medicate to gold NPs. Beneath the ideal conditions, the extinguished fluorescence (FL) escalated was straight with the examined concentration. The extinguishing instrument of CEF on the outflow band of Au-NPs was clarified by Stern-Volmer law. The moment spectrophotometric strategy was based on conglomeration of synthesized gold nanoparticles. Gold nanoparticles appeared retention at 522 nm. Upon interaction with the CEF, the band at 522 nm vanished with arrangement of a unused ruddy moved band at 673. Distinctive exploratory variables were optimized for higher affectability. The calibration bands were straight with concentration extend of 0.1-12 µg/mL for the examined medicate. The methods were connected effectively to decide the studiedddrug in minor concentrations in immaculate frame, pharmaceutical measurement shapes and organic liquids (human serum and urine samples). Manuscript profile -
Open Access Article
6 - Survey and Evaluation of Hardystonite Nanostructure (HTN) Bioactivity in Biomedical Engineering
hassan GHEISARIHardystonite (HT) is a monoclinic pyroxene mineral with composition Ca2ZnSi2O7. Lately, Hardystonite (HT) has been introduced as a bioceramics due to its best bioactivity and biocompatibility. It has a good strength and toughness than those of hydroxyapatite (HA). In th MoreHardystonite (HT) is a monoclinic pyroxene mineral with composition Ca2ZnSi2O7. Lately, Hardystonite (HT) has been introduced as a bioceramics due to its best bioactivity and biocompatibility. It has a good strength and toughness than those of hydroxyapatite (HA). In this project, bioactivity of hardystonite (HT) powder were evaluated and investigated. For synthesized of hardystonite (HT) powder, Zinc (Zn), calcite (CaCO3) and nano silicium (SiO2) powders was mechanically activate for different times. After that, the prepared powders were blended with ammonium chloride (NH4Cl) and put on various temperatures. In this part, for survey of bioactivity evaluation, the obtained hardystonite (HT) powders were pressed and immersed in Kukobo solution (SBF)The results indicated that nano-struacture hadystonite powder with crystalline size is 40 nm. The apatite formation ability,bioactivity and good mechanical behavior make it a good candidate in bone implant materials and open new insights in biomedical engineering. The apatite formation ability,bioactivity and good mechanical behavior make it a good candidate in bone implant materials and open new insights in biomedical engineering. Manuscript profile -
Open Access Article
7 - Green Synthesis and Characterization of Bimetallic (Ag-Cu) Nanoparticles from Leaf extract of Celtis integrifolia (Hackberry) and it’s Antimicrobial Activity
Nasiru Yahaya Wilson Lamayi Sulaiman MuhahammadThe (Ag-Cu) bimetallic nanoparticles was synthesized from the leaf extract of Celtis integrifolia using the silver nitrate (AgNO3) copper chloride (CuCl2) as a metal precursors. The synthesized bimetallic nanoparticles was characterized using UV-visible spectrophotometr MoreThe (Ag-Cu) bimetallic nanoparticles was synthesized from the leaf extract of Celtis integrifolia using the silver nitrate (AgNO3) copper chloride (CuCl2) as a metal precursors. The synthesized bimetallic nanoparticles was characterized using UV-visible spectrophotometry, the celtis extract shows highest peak at 300nm due to plasma vibration and excitation of bio reduction capping agent Ag-CuNPs shows peak at 300nm which is due to surface Plasmon vibration, indicating the formation of bimetallic nanoparticles due to the excitation of the surface Plasmon vibration and phytochemical constituent present in the extract. FT-IR identify the functional groups present, SEM shows the morphology of the bimetallic Ag-CuNPs is partially merely crystalline and spherical in nature. XRD analysis of Ag-CuNPs showed face centered cubic structure (FCC) with average particle size of 54.42. The (Ag-CuNPs) bimetallic nanoparticles shows significant antibacterial and anti-fungal activity when tested against Escherichia-coli, pseudomonas aureginosa (Gram-negative), staphylococcus aures, Klebsella Pneumonia (Gram-positive) bacteria’s and two fungi Aspagillus niger and Candida using Augomentine and Fulcin as control drugs. Manuscript profile -
Open Access Article
8 - A novel soft polycaprolactone-alginate nanofiber plasma-modified with sufficient cell attachment for tissue engineering
Elham Azizifard َAzadeh Asefnejad Sedigheh Joughehdoust Hadi BaharifarDegradable polymers belonging to the aliphatic polyester family are currently the most attractive group of synthetic polymers. Natural and synthetic materials used in tissue engineering scaffolds should have properties such as proper biocompatibility and biodegradabilit MoreDegradable polymers belonging to the aliphatic polyester family are currently the most attractive group of synthetic polymers. Natural and synthetic materials used in tissue engineering scaffolds should have properties such as proper biocompatibility and biodegradability with controllable degradation and adsorption rate. Synthetic polymers provide the mechanical support required by the system and the tensile strength for cell attachment and growth. Compared to synthetic polymers, natural polymers are more compatible and reduce the likelihood of tissue rejection after transplantation. In this article, sodium alginate (SA), polyvinyl alcohol (PVA) and polycaprolactone (PCL) were used to produced porous scaffold. For this purpose, different percentages of SA and PVA were prepared for electrospinning technique. The PCL/80PVA: 20SA scaffold was evaluated by fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), light microscopy (LM), swelling, biodegradability and biocompatibility analyzes after plasma process. Morphological examination showed the fiber diameter was about 299 nm and the inflation and degradation were reported at 92% and 18%, respectively. The contact angle created is equal to 42 °and the biocompatibility study for the scaffold showed 93% survival rate. The obtained results showed that PCL/80PVA: 20SA scaffold after plasma can be used in tissue engineering. Manuscript profile
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