Investigative evaluation of Cassia absus for antibacterial capacity and biomimetic synthesis of silver nanoparticles |
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Authors: | Mehreen Jehan Fiza Saeed Zanib Khan Muddassar Shah Ayesha Sikandar Afia Inayat Sartaj Ali Arshad Mehmood Khan Ayesha Talib Muhammad Aasim Abid Ali Khan |
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Affiliation: | 1. Department of Microbiology, Government Postgraduate College No. 2, Mandian, Abbottabad KP, Pakistan ; 2. Department of Biosciences, COMSATS University Islamabad, Tarlai Kalan, 45550 Islamabad Pakistan ; 3. Department of Biotechnology, University of Malakand, Dir Lower KP, Pakistan |
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Abstract: | Cassia absus is used for medicinal purposes for a long time all over the world. In this study, the authors report the antimicrobial potential of C. absus extracts obtained with different solvents. The extract(s) obtained with ethyl acetate yielded the best antibacterial effects because of a rich supply of oxalates and alkaloids in it. The same extract was also exploited for reducing Ag+ ions (to metallic Ag0) for the synthesis of nanoparticles. Electron microscopy revealed that the silver nanoparticles were ∼18–25 nm in diameter. The Fourier‐transform infrared evaluation pointed towards the fact that flavonoids present in the plant extract were acting as reductants while amino groups were the bound stabilisation agents to the synthesised nanoparticles limiting the diameter to a certain threshold and avoiding aggregation naturally. A comparative antibacterial assay of C. absus versus Ag nanoparticles showed that the nanoparticles as well as organic (ethyl acetate) extract of the plant checked the growth of selected (MDR) superbugs. However, the biosynthesised Ag nanoparticles returned better antibacterial efficacies than ethyl acetate extract.Inspec keywords: biomimetics, nanomedicine, nanoparticles, nanofabrication, reduction (chemical), microorganisms, silver, antibacterial activity, Fourier transform infrared spectra, biomedical materials, electron microscopyOther keywords: antibacterial capacity, biomimetic synthesis, silver nanoparticles, antimicrobial potential, ethyl acetate, oxalates, alkaloids, electron microscopy, Fourier‐transform infrared evaluation, antibacterial efficacies, antibacterial assay, organic extract, Cassia absus, flavonoids, Ag |
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