Research Article

Cytotoxic Effects of Biosynthesized Zinc Oxide Nanoparticles on Murine Cell Lines

Figure 5

Flow cytometric analysis of apoptosis induction by ZnO-NPs in WEHI-3B cells after staining with FITC-conjugated annexin V and PI. (a1)–(c1) untreated (control) WEHI-3B cells at 12, 24, and 48 h incubation, respectively. (a2)–(c2) effects of 12, 24, and 48 h ZnO-NPs treatment, respectively.