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Evaluation of the ability of yeast Saccharomyces cerevisiae to biosynthesis of silver nanoparticles

Niknejad, F. and Moazeni, M. and Rezaie, S. and Joshaghani, H.R. (2012) Evaluation of the ability of yeast Saccharomyces cerevisiae to biosynthesis of silver nanoparticles. MYCOSES, 55 (4, SI). p. 176.

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Abstract

Background: Metal nanomaterials are unique because they show optical properties that depend on such physical properties as size, shape, and interparticle spacing. Their unique size-dependent property makes these materials better-quality in many areas of human activity. Biosynthesis of nanomaterials has been recently the aim of precious studies due to the environment-friendly nature of the biological processes and microorganisms such as fungi have been re-explored as potential bio-factories rather than the causing agents of humans and plants infections. The enzymatic activity of yeast presents them as highly competent microorganisms to precipitate of nanoparticles in external environment of the cell. This considerable ability has recently considered as worthy, applicable and available candidates for synthesis of smaller nano-sized particles. Materials and methods: A standard strain of Saccharomyces cerevisiae PTCC 5209 was grown in YPD medium. The yeasts were exposed to 2 m mol l⁻¹ of AgNO3 after ≈10 h of incubation at 30 °C. Afterward, the suspension was incubated in dark for 24 h. The cells were then separated from the culture medium by centrifugation and the cell-free medium was used for further characterization of synthesized Silver nanoparticles. The reduction of Ag+ ions to metal nanoparticles was investigated virtually by tracing the color of the solution which turned into reddish-brown after 24 h. The morphology and uniformity of silver nanoparticles were investigated by UV-VIS spectroscopy and X-ray diffraction. Results: The results demonstrated that the formed nanoparticles are fairly uniform, spherical, and small in size (less than70 nm). The yeast S. cerevisae has successfully demonstrated potential for extra cellular synthesis of fairly mono-dispersed, tiny silver nanoparticles. Extracellular synthesis of silver nanoparticles by this yeast is highly advantageous and may make the process simpler and easier for following usage. By using this approach, it is suggestive that this rapid synthesis of nanoparticles would be proper for developing a biological process for mass scale production.

Item Type: Article
Uncontrolled Keywords: Nanoparticles; Saccharomyces cerevisiae; silver
Subjects: موارد کلی
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 27 Apr 2015 08:55
Last Modified: 24 Jun 2017 07:14
URI: http://eprints.goums.ac.ir/id/eprint/3867

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