961216.fig.006
Figure 6: MTT test of epithelial cells from human retina (D407 cells viability (%)) treated with various concentrations of PEG-GENs and GNPs. The effect of supernatant onto cell viability is also presented. Data are presented as means and standard errors of the mean (SEM): *significant 𝑃 < 0 . 0 5 , **very significant 𝑃 < 0 . 0 1 .