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Flow cytogram and red/green fluorescence depicting the changes in MMP (ζ) of KB cells (a,b) treated with 0 and 25 μg/mL MgZnO NPs for 24 h. In the flow cytogram, P2 scatter region (red dots) indicates cells with polarized mitochondrial membrane, whereas P3 scatter region (green dots) denotes cells with depolarized mitochondrial membrane. (c) Change in red/green ratio on treatment with different concentrations of ZnO and MgZnO NPs.
