RESEMBLANCES BETWEEN THE BIOSYNTHESIZED SILVER NANOPARTICLES OF ASPERGILLUS NIGER AND TRICHODERMA VIRIDE AND THEIR ANTIOXIDANT ACTIVITY
Gitanjali B. Shelar*
ABSTRACT
Bacterial and fungal synthesized silver nanoparticles are imperative in nanotechnology. In present report resemblances between the Aspergillus niger and Trichoderma viride synthesized silver nanoparticles is described and also assess their antioxidant property. These biosynthesized silver nanoparticles were evidenced by UV-vis spectrum showing the absorbance between 415-425 nm. The extracellular silver nanoparticles were characterized by Transmission electron microscopy (TEM) and X-ray Diffraction (XRD). TEM showed spherical shape of the nanoparticles of a specific average size 10–50 nm. XRD confirmed the presence of crystalline silver nanoparticles in the sample. The reduction of the silver ions might have occurred by a nitrate-dependent reductase enzyme. A. niger and T.viride were found to be quite competent for the purpose of commercial silver nanoparticle production, since it is synthesized extracellularly as well as rapidly. This work also presents the silver nanoparticles have remarkable antioxidant activity against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria and consequently it may discover potential applications in the treatment of the diseases.
Keywords: Silver nanoparticles; Aspergillus niger; Trichoderma viride; UV-vis spectrum; Transmission Electron Microscopy (TEM); X-ray Diffraction (XRD).
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