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Neeran Obied Jasim
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Medicine & Pharmacology

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Characterization of Silver Nano Particles Synthesized by Leaves Green Tea Extract Neeran Obied Jasim
Journal of Global Pharma Technology Volume 10 Issue 10: 2018
Publisher : Journal of Global Pharma Technology

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Background and Objective: Plant extract contain biomolecules which can be a reduce metal, ions, to nanoparticles in one step n synthesis process.. Materials and Methods: green synthesis of silver nanoparticles using aqueous leaves extract of green tea and study the characters of this particles using UV -VIS spectrophotometer and SEM .Also, Investigation the antifungal activity of it. Results : silver nanoparticles were synthesized using leaf extract of green tea in present of silver nitrate and the color change to brown .UV-Vis spectrophotometer appear peak in wavelength at 420nm which is prescribed for silver nanoparticles . the microscope images by SEM, showing the size of Ag nanoparticles in range 3.6-5.3nm.Antifungal activity explain the ability of biosynthesis silver nanoparticles to inhibition the growth of yeast, C. neoformans with zone of inhibition 2.7mm compare with leaves extract in diameter 7mm.Conclusion: An extract of leaves green tea at room temperature act as reducing agent and can be used in synthesis of silver nanoparticles which have antifungal activity.Keywords: Green synthesis, Nanoparticles, Silver nanoparticles, C. neoformans.
Compare between Two Methods for Green Synthesis of Silver Nanoparticles Neeran Obied Jasim
Journal of Global Pharma Technology Volume 11 Issue 05.
Publisher : Journal of Global Pharma Technology

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In this study, compared  between two biological  methods were used for synthesize  Ag nanoparticles , the first used the extract of the conocarpus and the second used Aspergillus niger .Characterized of these nanoparticles was study by UV–vis spectrum(UV), X-Ray diffraction (XRD), scanning electron microscopy (SEM )analysis .Also antimicrobial activity of synthesis nanoparticles were investigation .Results show, used of plant extract  can be considered as the best formulation for the preparation of silver nanoparticles Because of its small particle size, good stability and purity.Keywords: Ag nanoparticles, Green synthesis, Conocarpus extract, A. Niger.
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