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Levels of dopamine (A), serotonin (B), and norepinephrine (C) in the brain cortex and plasma of rats treated with aluminum oxide nanoparticles (Al2O3-nps), zinc oxide nanoparticles (ZnO-nps), and their combination. Statistical analysis was performed to measure the significant differences with p<0.05 and has been denoted as [*]. The significant differences were compared to the control and between the treatment groups.
