Antimicrobial activities of biosynthesized silver nano particles from leaves extract of some medicinal plants
1 Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Uyo, Uyo, AkwaIbom State, Nigeria.
2 Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Uyo, Uyo, Akwa Ibom State, Nigeria.
3 Department of Pharmacognosy and Natural Medicine, Faculty of Pharmacy, University of Uyo, Uyo, AkwaIbom State, Nigeria.
Research Article
GSC Biological and Pharmaceutical Sciences, 2021, 14(02), 197-203.
Article DOI: 10.30574/gscbps.2021.14.2.0057
Publication history:
Received on 19 January 2021; revised on 23 February 2021; accepted on 25 February 2021
Abstract:
The antimicrobial activity of biosynthesized silver nanoparticles (AgNPs) from the leaves of four medicinal plants, Carica papaya (CP), Moringa oleifera (MO), Mangifera indica (MI) and Garcinia kola (GK) were assessed against selected gram positive and gram-negative bacteria. Method of synthesis of nanoparticles utilized was the eco-friendly Bio-based method using plant leaves extract as reducing and stabilizing agents. Two different ratios for each plant extract and silver nitrate (1:1 and 1:2) respectively were used. Particle characterization was carried out using visual inspection and UV-Vis spectrophotometry. Antimicrobial activity was assessed using agar diffusion method. Visual inspection revealed gradual color change from golden yellow to dark brown, confirming nanoparticles formation. The surface plasmon resonance peak was between 416 and 438 nm for the silver nanoparticles. The minimum inhibitory concentration ranged from 3.125 - 12.5µg/ml. In conclusion, all four biogenic silver nanoparticles have reasonable antimicrobial activity with ratio 1:2 being more potent.
Keywords:
Silver nanoparticles; Antimicrobial; Characterization; Leaves; Chemical reduction
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Copyright © 2021 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
