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Effects of three AgNPs on the head thrashes (A) and body bends (B) 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.
