Figure 1.

Line graph of antioxidant activity in exposed rats compared to controls, data represent the mean and standard deviation of five rats, broken line indicates exposed rats while the continuous line indicates control; * indicates significant difference between exposed rats and control (p < 0.05): (a) Superoxide dismutase SOD activity (U/L), ‘a’ indicates significant difference compared to day 7, 14, 21, 28 and 35; (b) Glutathione activity (U/L), ‘a’ and ‘b’ indicate significant differences compared to day 14, 21, 28 and 35, ‘c’ and ‘d’ indicate significant differences compared to day 35 ; (c) Catalase activity (U/L), ‘a’, b’ and ‘c’ indicate significant differences compared to day 35.