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Typical patterns of in vitro generation of different ROS i.e. (a) superoxide radicals (b) hydroxyl radicals, and (c) hydrogen peroxide by ZnO and TiO2 nanoparticles and their respective ions. In all the three graphs, the nanoforms of ZnO and TiO2 exhibited a greater release of ROS as compared to their respective ionic counterparts. Data represent mean ± S.D. (n = 3), p-value ≤0.05.
