Fig. 3. ROS/RNS generation in MRC-5 cells following MWCNT exposure for 24 h. (a) Confocal fluorescent images of MRC-5 cells showing oxidative stress (green), superoxide radicals (red) and no radicals (yellow). (b) Change in total ROS/RNS following exposure to varying concentrations of MWCNTs with respect to MRC-5 cells non-exposed to MWCNTs (0 μg ml–1). Error bars are standard error of the mean. *p < 0.001 vs. 0 μg ml–1 for both IG-MWCNTs and RG-MWCNTs.
