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SOD activity in erythrocytes incubated in vitro for 3 hours with increasing concentrations of NaF (a) or incubated with 100 μg/mL NaF or 100 μg/mL NaF with Vit-E in increasing concentrations (b). The results are expressed as the mean ± standard deviation of five independent experiments, taking two samples per experiment and performing the determinations in triplicate. a P < 0.05 compared with the control group; b P < 0.05 compared with the group incubated with only 100 μg/mL NaF.
