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Effect of ZnO NPs, CoFe2O4 NPs, and their combination on the levels of Norepinephrine in the brain of Balb/c mice. Normal and PD mice were injected with 5.6 mg/kg ZnO, 5.6 mg/kg CoFe2O4, or a combination of both NPs. Levels of Norepinephrine were assayed in whole brain extracts using the ELISA method. Data represented are the average of 3 different determinations ±SD.
