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Biogenic synthesis of antimicrobial silver nanoparticles capped with L-cysteine

Perni, Stefano, Hakala, Veera and Prokopovich, Polina ORCID: 2014. Biogenic synthesis of antimicrobial silver nanoparticles capped with L-cysteine. Colloids and Surfaces A: Physicochemical and Engineering Aspects 460 , pp. 219-224. 10.1016/j.colsurfa.2013.09.034

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The number of medical applications of silver nanoparticles is constantly expanding due to their high bactericidal properties coupled with low toxicity towards mammalian cells. Because of this expanding use of silver nanoparticles, novel methods of synthesis have been developed in order to achieve nanoparticles preparation through inexpensive and environmentally friendly processes; biogenic synthesis of silver nanoparticles is an approach that meets those requirements. In this work, Escherichia coli cultures centrigugates were used to synthesis l-cysteine capped silver nanoparticles. The ratio between AgNO3 and l-cysteine has been proven to affect the size of the nanoparticles: higher amount of l-cysteine returns smaller nanoparticles, but does not affect the percentage of organic matter in the nanoparticles as determined through TGA. The silver nanoparticles prepared had antimicrobial activity against E. coli and Staphylococcus aureus with Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) independent of the nanoparticles size; for both bacterial species the values of MIC and MBC were the same, 0.0432 mg/ml for E. coli and 0.0216 mg/ml for S. aureus.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: R Medicine > RS Pharmacy and materia medica
Publisher: Elsevier
ISSN: 0927-7757
Date of First Compliant Deposit: 30 March 2016
Last Modified: 06 Nov 2023 22:58

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