Intensified biosynthesis of silver nanoparticles using a native extremophilic Ureibacillus thermosphaericus strain

The microflora of Ramsar geothermal hot springs located in Mazandaran province, Iran was screened for native thermophilic bacteria that are capable of biosynthesis of silver nanoparticles. One isolate identified as “ Ureibacillus thermosphaericus” showed high potential for silver nanoparticle biosyn...

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Published in:Materials letters 2011-03, Vol.65 (6), p.1014-1017
Main Authors: Juibari, M. Motamedi, Abbasalizadeh, S., Jouzani, Gh. Salehi, Noruzi, M.
Format: Article
Language:English
Subjects:
Biosynthesis
Culture
Extremophilic
Geothermal
Hot spring
hot springs
Ion concentration
Nanoparticles
nanosilver
Optimization
Silver
Silver nanoparticle
temperature
Thermophilic bacteria
Ureibacillus thermosphaericus
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creator Juibari, M. Motamedi
Abbasalizadeh, S.
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description The microflora of Ramsar geothermal hot springs located in Mazandaran province, Iran was screened for native thermophilic bacteria that are capable of biosynthesis of silver nanoparticles. One isolate identified as “ Ureibacillus thermosphaericus” showed high potential for silver nanoparticle biosynthesis with extracellular mechanism and selected for the biosynthesis optimization. Biosynthesis reactions were conducted using the culture supernatant at different temperatures (60–80 °C) and silver ion concentrations (0.001–0.1 M). The results obtained showed that pure spherical nanoparticles in the range of 10–100 nm were produced, and the maximum nanoparticle production was achieved using 0.01 M Ag-NO 3 at 80 °C. In conclusion, the findings of this study confirmed the great biocatalyzing potential of the extremophilic U. thermosphaericus supernatant for intensified biosynthesis of silver nanoparticle at elevated temperatures and high silver ion concentrations.
doi_str_mv 10.1016/j.matlet.2010.12.056
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subjects Biosynthesis
Culture
Extremophilic
Geothermal
Hot spring
hot springs
Ion concentration
Nanoparticles
nanosilver
Optimization
Silver
Silver nanoparticle
temperature
Thermophilic bacteria
Ureibacillus thermosphaericus
title Intensified biosynthesis of silver nanoparticles using a native extremophilic Ureibacillus thermosphaericus strain
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