Figure 3
Induction of intracellular ROS production (measured using the DCFH-DA assay) in NR8383 (A) and Caco-2 (B) cells after 24 hours exposure to increasing concentrations of Si NP-NH 2 (black triangle), Si NP-N 3 (black square) and Si NP-COOH (black dot). Error bars show standard error of mean (n = 3). The asterisk (*) sign signifies P < 0.05.