The starch capped Ag nanoparticles were obtained by the chemical reduction of AgNO3 and they were characterized by the isolation of DNA from E.Coli (pUC18) has resulted in single strand DNA which was subsequently modified with Trauts reagent. The introduction of thiol group to the DNA by Trauts reagent facilitates the formation of bioconjugate. The Ag-DNA bioconjugate was characterized by spectroscopic techniques and SEM studies. The comparative study of the scanning electron micrographs of the free DNA and the bioconjugate clearly demonstrated the binding of Ag nanoparticles with DNA...

The emergence of nanoscience and nanotechnology in the last decade presents opportunities for exploring the bactericidal effect of metal nanoparticles. Copper nanoparticles in the present investigation have been synthesized by chemical reduction method using IPA as reducing agent and CTAB as a capping agent. The synthesized copper nanoparticles encapsulated with siddha drug Rajakalimbu. The copper nanoparticles entrap with siddha drug Rajakalimbu characterized by spectral studies ( UV-Vis spectroscopy) and microscopic studies (TEM, AFM). The antibacterial activity of CuNPs as well as drug...