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Authors: P.Karthiga, T. Shankar, K. Swarnalatha

ABSTRACT. Nanosized particles of less than 100 nm in diameter are presently the most attracting rising consideration for the broad range of novel applications in various fields. The main methods used for silver nanoparticles synthesis are the physical, chemical and biological methods. The foremost biological systems occupied in this are bacteria, fungi, and plant extracts. The rapid progress in nanotechnology was always accompanied by their toxic impaction the environment and human health, which creates an urge for researchers to find an alternative approach. We have studied the formation of silver nanoparticles (AgNPs) from UV-VIS spectrum, which contains a strong plasmon band at 420 nm for biological and 425 nm for chemical method, which confirms silver ions reduction to Ag° in the aqueous phase. The development of metal silver was also confirmed by powder X-ray diffraction (XRD) analysis. Scanning electron micrograph (SEM) revealed useful information about the morphology of AgNPs and the average size of nanoparticles was in the range of 30 nm. The bactericidal activity of AgNPs biosynthesized from aqueous root extract of Abutilon indicum was more effective as antibacterial agent compared to chemical route. The activity was evaluated against Escherichia coli, Pseudomonas aurogenosa and Klebsiella pneumoniae. In the present work, AgNPs synthesized through chemical (Ascorbic acid) and biological (aqueous Abutilon indicum root extract) route were compared due its imperative scope in medicinal field.

Keywords: Abutilon indicum, bactericidal activity, gram negative strains.

DOI 10.2412/mmse.13.97.14


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