Abstract

NARANJO-HERRERA, Ana María; CORREA-TORRES, Sandra Natalia  and  HERRERA-BARROS, Adriana Patricia. Evaluation of the antimicrobial property of gold nanoparticles synthesized with tamarindus indica L and mangifera indica L extracts. Ing. invest. y tecnol. [online]. 2017, vol.18, n.4, pp.389-398. ISSN 2594-0732.

Several studies had been reported the use of gold nanoparticles in different fields as growing inhibitor of microorganisms due its antimicrobial property. In this work, was evaluated the antimicrobial property of biosynthesized gold nanoparticles (Bio-AuNPs) from plants extracts. First, gold nanoparticles synthesis was made by a biological method, in which were used leave extracts of Tamarindus indica L. and Mangifera indica L. and precursor salt of chloroauric acid (HAuCl4) with a concentration of 0.27mM. After the biosynthesis of the nanoparticles, solutions were made with AuNPs in a aqueous medium with a concentration of 1.1 mg/mL and 0.9 mg/mL each. The SEM analysis on the Bio-AuNPs showed an average particle size of 52 ± 5 and 78 ± 7 nm for each extract. The antimicrobial property of the gold nanoparticles was evaluated by three methods: medium of modified culture, surface culture and test by disk diffusion, in which there were bacteria and fungi growings due the low concentration of the solution of the AuNps. The results showed that solutions with higher concentration of AuNps will be potential candidates to act as anti-microbian agent.

Keywords : biosynthesis; nanoparticles; gold; antimicrobial property.

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