Microbial Synthesis of Silver Nanoparticles by Streptomyces glaucus and Spirulina platensis
| Autor: | David Gvarjaladze, Elena Ivanovna Kirkesali, Maxim Sergeevich Wakstein, Natalya Vladimirovna Shvindina, Vladimir Yakovlevich Shklover, D. T. Pataraya, Inga Zinicovscaia, Sergey Nikolaevich Khakhanov, Manana Amir Gurielidze, Giorgi Ilia Tsertsvadze, Nelly Yason Tsibakhashvili, Marina Frontasyeva, T. L. Kalabegishvili |
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| Rok vydání: | 2011 |
| Předmět: |
Spirulina (genus)
Rhizosphere Health (social science) General Computer Science biology Chemistry Scanning electron microscope General Mathematics Microorganism General Engineering Nanoparticle Nanotechnology biology.organism_classification Streptomyces glaucus Streptomyces Silver nanoparticle Education General Energy Chemical engineering General Environmental Science |
| Zdroj: | Advanced Science Letters. 4:3408-3417 |
| ISSN: | 1936-6612 |
| DOI: | 10.1166/asl.2011.1915 |
| Popis: | Microbial synthesis of nanoparticles has a potential to develop simple, costeffective and eco-friendly methods for production of technological ly important materials. In this study, for the first time a novelactinomycete strain Streptomyces glaucus71 MD isolated from a soy rhizosphere in Georgiais for the first time extensively characterized and utilized for the synthesis of silver nanoparticles. Scanning Electron Microscope (SEM) allowed observing extracellular synthesis of nanoparticles , which has many advantages from the point of view of applications. Production of silver nanoparticles proceeded extracellularlywith the participation of another microorganism, bluegreen microalgae Spirulinaplatensis (S. platensis). In this study it is shown that the production rate of the nanoparticles depends not only on the initial concentration of AgNO3 but also varies with time in a nonmonotonic way. SEM study of silver nanoparticles remaining on the surface of microalgae revealed that after 1 day of exposure to 1 mM AgNO 3 nanoparticles were arranged as long aggregates along S. platensiscells strongly damaged by silver ions. However, after 5 days of exposure to silver S. platensiscells looked completely recovered and the nanoparticles were distributed more uniformly on the surface of the cells. |
| Databáze: | OpenAIRE |
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