SYNTHESIS OF SILVER NANOPARTICLES USING A THERMOPHILIC BACTERIUM STRAIN ISOLATED FROM THE SPRING YUKHARI ISTISU OF THE KALBAJAR REGION (AZERBAIJAN)
2022
Gunashova, G.Y.
The eco-friendly synthesis of silver nanoparticles using thermophilic bacteria is a safe replacement for the chemical and physical methods. The study is devoted to the synthesis of silver nanoparticles using the thermophilic bacterium strain KY2 which was isolated from the thermal water spring Yukhari Istisu of Kalbajar region. Morphologically, the cells of this strain are spore-forming rods. On the surface of a solid nutrient medium, it forms cream-colored, round, wavy colonies along the edges. It was found that KY2 strain actively grows in the temperature range 55-60°C, at pH=7.0-9.0. The synthesis of silver nanoparticles was observed both in the biomass and in the cell-free supernatant of the strain. Characterization of the synthesized silver nanoparticles was done by UV-vis Spectroscopy. The obtained UV-visible spectrum of the aqueous medium containing silver ion, showed a peak at 410-420 nm which corresponds to the Plasmon absorbance of the silver nanoparticles.
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