Factors influencing amphibian population at Cauvery river banks of Nagappattinam District, Tamil Nadu, Southern India

Abstract :

In the present study, silver nanoparticles were synthesized from the rhizome extract of Alpinia calcarata and the leaves extract of Melia dubia and Solanum nigrum by a simple and eco-friendly route. Bioreduction of Ag+ to Ag0 was observed when the aqueous leaf extract was mixed with 1mM of silver nitrate (AgNO3 ) and heated to 95 oC. The development of silver nanoparticles was characterized on the basis of change of colour with the help of UV-VIS spectroscopy. The biosynthesized silver nanoparticles were tested for their antibacterial activity the test cultures of Staphylococcus aureus (Gram Positive) and Klebsiella pneumonia (Gram Negative) bacteria. The silver nanoparticles showed a clear zone of inhibition against these bacterial strains. This strategy gives a straightforward, simple and less-time consuming technique for synthesizing nanoparticles which could be utilized in several areas of medicine.