Figure 4
From: The Photodynamic Effect of Different Size ZnO Nanoparticles on Cancer Cell Proliferation In Vitro
Dynamic response of SMMC-7721 cells exposure to ZP5 ZnO nanoparticles. a in the absence of UV irradiation:a ZnO nanoparticle-free (control),b 2.5 μg/mL of ZnO nanoparticles,c 5.0 μg/mL of ZnO nanoparticles and d 10.0 μg/mL of ZnO nanoparticles; b The comparison of decrease for cell activity in the absence/presence of UV (irradiated for 180 s) after ZP 5 NPs was incubated in the cell system for about 72 h