Cytotoxic and antibacterial activities of biologically synthesized gold nanoparticles assisted by Micrococcus yunnanensis strain J2

a) mine soil samples were taken and screened for Au NPs producing bacterial isolate as observed on b) nutrient agar plate and c) scanning electron microscope (SEM). The selected isolate was cultivated and the culture broth was mixed by HAuCl4 (different concentration of 0.1, 0.5, and 1 mM) d) to synthesized Au NPs. e) Transmission electron micrograph and f) SEM image of the biogenic Au NPs were then prepared.390