Total antioxidant capacity was assayed in brain homogenates according to the ferric reducing antioxidant power (FRAP) assay. This method depends on the reduction of ferric tripyridyl-s-triazine (Fe3+-TPTZ) at low pH. Fe2+-TPTZ has an intensive blue color that can be monitored for up to 5 min at 593 nm by a spectrophotometer. Calculations were done by using a calibration curve of FeSO47H2O (100−1000 mM) [2].
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