Fig. 3

Induction of DNA damage in CHO AA8, HEKn and FJ cells by 1 h’s treatment with kaolin micro- and nano-particles. Mean ± S.D. values of 40–100 comet images are shown. In the graph, CT represents the solvent control (treatment with 0.005% (v/v) Tween 80). Concentrations are given in μg/mL. MMC represents 0.1 μg/mL MMC-treatment as a reference. *Significant difference versus the solvent control at p < 0.0167, †significant difference between particle size at p < 0.0167, according to the t-test with Bonferroni correction