Fig. 4From: Genotoxicity of micro- and nano-particles of kaolin in human primary dermal keratinocytes and fibroblastsProduction of ROS in CHO AA8, HEKn and FJ cells by 1 h’s treatment with kaolin micro- and nano-particles. Relative frequencies of ROS positive cells (mean values) to that of the solvent control treatment 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 treatmentBack to article page