Antimicrobial activity and characterization of biosynthesized silver nanoparticles from Anisochilus carnosus

Silver nanoparticles with size of 6- 57nm were synthesized by bioreduction method from anisochilus carnosus aqueous and ethanolic extract. biosynthesized nanoparticles showed maximum antimicrobial activity against k. pneumonia (13±1.67mm), e.coli (13±1.97mm) and b. subtilis (13±1.07mm) followed by p. aeruginosa and minimum against s. aureus. the quantitative formation, characteristics and impurities of silver nanoparticles were studied using uv-vis absorption spectroscopy, x-ray diffraction analysis, edx spectrum, scanning electron microscopy (sem) analysis. based on this investigation these silver nanoparticles may be used in effluent treatment process for reducing the microbial load.