Fig. 4
Effects of amorphous SiNPs on hydroxyl radical (·OH) elimination. a ESR spectra of ·OH in human erythrocyte membranes incubated with SiNPs for 2 h at different concentrations (0, 10, 20, 50, and 100 μg/mL). b ·OH elimination rates calculated as [(peak heights of blank tubes − peak heights of samples)/peak heights of blank tubes]*100 %. Data are expressed as mean ± S.D., *p < 0.05 vs the control group