Fig. 6

Cell viability of HEK and U87 cell lines treated with green synthesized Na-doped ZnO NPs and original pictures of HEK(A) and U87(B) cells treated with different concentrations of Na-Doped ZnO NPs (a control; b 20 µg/ml; c 80 µg/ml; d 600 µg/ml). (Magnification: 40x)