Table 1: Frequency of micronucleus in rats (R) treated with benzopyrene.
| Frequency of micronucleus ± d. e. |
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| Week > |
0 | 1 | 2 | 3 | 4 | 5 | 6 |
| R-1 | 1.13 ± 0.16 | *18.26 ± 0.26 | *19.3 ± 0.29* | *25.4 ± 0.3* | *20.5 ± 0.22* | *27.4 ± 0.61* | *30.5 ± 0.41* |
| R-2 | 1.5 ± 0.008 | *19.8 ± 0.36 | *26.8 ± 0.17 | *25.0 ± 0.12 | *24.4 ± 0.38 | *28.0 ± 0.19 | *29.5 ± 0.18 |
| R-3 | 2.0 ± 0.23 | *19.3 ± 0.35 | *17.7 ± 0.52 | *29.76 ± 0.11 | *28.16 ± 0.21 | *29.76 ± 0.11 | *28.16 ± 0.21 |
| R-4 | 1.0 ± 0.12 | *20.0 ± 0.93 | *23.5 ± 0.44 | *26.83 ± 0.61 | *23.83 ± 0.56 | *31.43 ± 0.41 | *33.6 ± 0.59 |
| R-5 | 1.74 ± 0.21 | *22.0 ± 0.63 | *18.6 ± 0.19 | *28.5 ± 0.24 | *27.5 ± 0.34 | *28.9 ± 0.29 | *32.5 ± 0.13 |
| R-6 | 1.14 ± 0.32 | *19.1 ± 0.38 | *17.33 ± 0.61 | *25.38 ± 0.33 | *27.36 ± 0.32 | *30.38 ± 0.30 | *31.31 ± 0.32 |
| R-7 | 1.4 ± 0.18 | *21.8 ± 0.55 | *25.7 ± 0.16 | *28.4 ± 0.16 | *29.4 ± 0.39 | *29.9 ± 0.71 | *31.8 ± 0.77 |
| R-8 | 1.2 ± 0.22 | *21.0 ± 0.13 | *26.1 ± 0.32 | *27.86 ± 0.61 | *31.02 ± 0.55 | *30.86 ± 0.62 | *33.73 ± 0.53 |
*Statistically significant difference with respect to week 0, ANOVA and Student T test, p = < 0.005; The frequency of erythrocytes was counted in 3000 cells per rat.