Figure 6From: The oxidative potential of differently charged silver and gold nanoparticles on three human lung epithelial cell types ROS production of chitosan-coated Au NPs (Au-CHIT-H) in a cell-free system after incubation in cell culture medium. A. A549 medium. B. BEAS-2B medium. C. NHBE medium. Fluorescence was measured at 530 nm (excitation 485 nm) every 10 minutes after an initial incubation period of 15 minutes. Means ± SEM of n=3 are shown.Back to article page