Figure 6.

SCE frequencies in the 0.15 mg/ml (6A), 0.6 mg/ml (6B) borax concentration experimental subgroups. The black arrows indicated SCEs occurred among human chromosomes of these subgroups. The sister chromatid exchange occurrence increased in the borax concentrations of 0.15, 0.2, 0.3 and 0.6 mg/ml experimental subgroups comparing with the control group.