Fig. 4.

Effects of 20 nm PVP-AgNPs (A), 20 nm AgNPs (B) and 50 nm AgNPs (C) on ROS in C. elegans after 48 h exposure (10×). Effects of three AgNPs on the relative fluorescence intensity of ROS (D) in C. elegans after 48 h exposure. Effects of three AgNPs on MDA (E) and GSH (F) contents in C. elegans after 48 h exposure. Experimental data were represented by mean ± SD in three parallel experiments. Compared with the control group, ^*P < 0.05. AgNPs, silver nanoparticles; PVP, polyvinylpyrrolidone; HPMC, hydroxypropyl methyl cellulose.