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Determination of HF antimutagenic effects using the Ames test—strain S. typhimurium TA98. Data shown are mean ±SD of three repeated experiments. NC = negative control; PC/M = positive control = mutagen = (4-nitroquinoline-1-oxide). Comparison with positive control (PC): * 0.01 < p < 0.05; ** 0.001 < p < 0.01; *** p < 0.001.
