Methanolic extract of Crocus sativus flowers was prepared, and its antioxidant activity
evaluated by total phenolic contents (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH)
radical scavenging activity, 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) radical
scavenging activity (ABTS) and the reducing power. The results showed that TPC was
86.65 mg/g gallic acid equivalents, while DPPH and ABTS for 1 mg/mL concentration
were 92.41 and 86.87, respectively. In the reducing power experiment, the IC50 value
was 231.75, about 11 times lower than that of ascorbic acid. The extract showed a
significant inhibitory effect on tyrosinase activity of 28.22%.
Methanolic extract of Crocus sativus flowers was prepared, and its antioxidant activityevaluated by total phenolic contents (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH)radical scavenging activity, 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) radicalscavenging activity (ABTS) and the reducing power. The results showed that TPC was86.65 mg/g gallic acid equivalents, while DPPH and ABTS for 1 mg/mL concentrationwere 92.41 and 86.87, respectively. In the reducing power experiment, the IC50 valuewas 231.75, about 11 times lower than that of ascorbic acid. The extract showed asignificant inhibitory effect on tyrosinase activity of 28.22%.
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