Figure 5From: The oxidative potential of differently charged silver and gold nanoparticles on three human lung epithelial cell types ROS production of functionalized NPs in a cell-free system. A. Silver NPs. B. Au NPs. Fluorescence was measured at 530 nm (excitation 485 nm) every 10 minutes after an initial incubation period of 15 minutes. Data is displayed as mean ± SEM (n=4).Back to article page