Fig. 1From: Biosynthesis, Characterization, and Bioactivities Evaluation of Silver and Gold Nanoparticles Mediated by the Roots of Chinese Herbal Angelica pubescens MaximTime-dependent UV-Vis spectra of DH-AgNps (a) and DH-AuNps (b) with A pubescens root extract. Plant extract does not contribute to the peaks in the region of DH-AgNps and DH-AuNps. The upper right insets show that the resulting colloid suspensions are brown for DH-AgNps (a) and purple for DH-AuNps (b)Back to article page