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- W2149519673 abstract "The development of reliable and eco-friendly organisms of silver nanomaterials is an important aspect of current nanotechnology research and application. Recently, microorganisms have been explored as potential biofactory for synthesis of silver nanoparticles. In this study, through screening of common bacteria, we report extracellular biosynthesis of metallic silver nanoparticles by the reduction of aqueous Ag + using Escherichia coli ATCC 8739, Bacillus subtilis ATCC 6633, and Streptococcus thermophilus ESh1 as potential candidates for the rapid synthesis of silver nanoparticles. The culture supernatant of silver nanoparticles biosynthesis by reduction of silver ion coming in contact with the cell filtrate was fast and was formed within few minutes. UV-visible spectrum of the aqueous media obtained from the above bacteria containing silver ion showed a peak around 420 nm corresponding to the plasmon absorbance of silver nanoparticles. Transmission electron microscopy (TEM) micrographs showed formation of well-dispersed silver nanoparticles in the range of 5–25 nm. X-ray diffraction (XRD) of silver nanoparticles exhibited 2 θ values corresponding to the silver nanocrystal. In vitro studies indicated that the formed silver nanoparticles showed variable antimicrobial activity against Escherichia coli, Bacillus subtilis, Salmonella typhimurium, Klebsiella pneumoniae, Staphylococcus aureus, and Pseudomonas aeruginosa and the fungus like yeast ( Candida albicans ). The diameter of inhibition zone varied according to the silver nanocrystal concentration and the test microorganism." @default.
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- W2149519673 date "2011-08-17" @default.
- W2149519673 modified "2023-10-07" @default.
- W2149519673 title "Extracellular Biosynthesis of Silver Nanoparticles Using <i>Escherichia coli</i> ATCC 8739, <i>Bacillus subtilis</i> ATCC 6633, and <i>Streptococcus thermophilus</i> ESh1 and Their Antimicrobial Activities" @default.
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- W2149519673 doi "https://doi.org/10.5402/2011/385480" @default.
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