Fig. 1.

The conversion of nitrate (a) to nano silver (b) by P. formosum biomass. The images show the colour changes before (a) and when (b) the method of reduction of ionic silver (Ag+) to AgNPs and UV-Visible spectra recorded after the reaction of 1 mM silver nitrate answer (a) with five g P. formousoum wet biomass at hydrogen ion concentration seven and twenty-five °C and formation of AgNPs (b).