Interactive Effect of Antioxidant Activities of Jujube Polysaccharides and Flavonoids
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Abstract:
Using Vc as control and hydroxyl radical (?OH), 2,2-diphenyl-1-picrylhydrazyl (DPPH?), [2,2′-azino-bis(3- ethylbenzothiazoline-6-sulfonic acid)] (ABTS)? + free radical scavenging activities and ferric-reducing/antioxidant power (FRAP) values as indicators, the interactive effect of the antioxidant activities of jujube polysaccharides (JPs) and jujube flavonoids (JFs) were studied. The results showed positive interactions between the antioxidant activities of JPs and JFs in four reaction systems, which were positively related to the effective concentration and activity of the antioxidants (R2 > 0.82; P < 0.01), as well as to the reaction systems. With ?OH reaction system as a representative example, the ratio of JPs and JFs for the optimum antioxidant activity was 1:1; when the concentration was 1.5 mg/mL, the scavenging rate increased to 97.88%, which was 63.33% higher than that of JPs and 16.36% higher than that of JFs. These results provide a theoretical basis for the study of antioxidant and ant-aging activities by using JPs and JFs as raw materials.
