Figure 1: Micronucleus formation, mitotic indexes, and survival rate of CHO-K1 cells after 3 h of exposure. CHO-K1 cells were exposed to (a) oil 1, (b) oil 2, and (c) oil 3. 3000 cells were scored per treatment for each experiment. ; on micronucleus formation or cell division and ¢ = cytotoxic () one-way ANOVA followed by Tukey’s post hoc test.