Figure 5: Cytotoxicity of human foreskin fibroblasts.

(a) Control fibroblast. (b) Fibroblasts exposed to 10 μg/mL ZnO + Pp1X. (c) Human fibroblasts treated with Pp1X (250 μg/mL). (d) Human fibroblast exposed to 250 μg/mL of ZnO NWs + ALA.
(a) Control fibroblast. (b) Fibroblasts exposed to 10 μg/mL ZnO + Pp1X. (c) Human fibroblasts treated with Pp1X (250 μg/mL). (d) Human fibroblast exposed to 250 μg/mL of ZnO NWs + ALA.