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Increasing DNA damage in human lymphocytes measured in terms of tail length after exposure to different concentrations of ZnO and TiO2 nanoparticles and their respective ions. Significant increase in tail length was observed at 100, 250 and 500 ppm with respect to control. ZnO NPs showed significant DNA damage at 500 ppm as compared to TiO2 NPs Data represent mean ± S.D. (n = 3), p-value ≤0.05.
