A. Arithmetic means (n=4-5) of body weight gain in mice, which were left untreated (control, white bar) or treated with 1000 mg/l nCu (black bar) for indicated time intervals (2, 4, 6 and 8 weeks). * (P<0.05), ** (P<0.01) and *** (P<0.001) represent significant differences from control group, ANOVA