Figure 2: a) Conical flasks with fungus Humicola sp. before (flask on the left side) and after (flask on the right side) exposure to HAuCl4 ions for 96 hr, b). UV-vis spectra recorded for the gold nanoparticles, inset shows the bottle containing filtrate of the control flask (1) and filtrate of treated flask with the fungus containing gold nanoparticles (2).