Fig. 1From: Antibiofilm activity of biosynthesized silver and copper nanoparticles using Streptomyces S29Distinct colors and UV/Vis spectrum of the bioformed nanoparticles using cell-free supernatant of Streptomyces isolate S29 (a) synthesized Ag-NPs with brown color, (b) Cu-NPs with greenish blue color (c) UV/Vis spectrum of Ag-NPs, and (d) UV/Vis spectrum of Cu-NPs (black curve: cell-free filtrate added salts, red curve: cell-free filtrate only)Back to article page