Antioxidant Effects of Solvent Extracts from the Dried Jujube (Zizyphus jujube) Sarcocarp, Seed, and Leaf via Sonication

作者：Kim Ye Jin; Son Dae Yeul^*

来源：Food Science and Biotechnology, 2011, 20(1): 167-173.

DOI：10.1007/s10068-011-0023-8

• jujube
• flavonoid
• polyphenol
• DPPH radical scavenging
• ABTS radical scavenging
• superoxide dismutase (SOD)-like activity

Antioxidant effects of extracts from sarcocarp, seed, and leaf of dried jujube (Zizyphus jujube) were investigated. The highest amount of flavonoids and polyphenol was found in 80% methanol leaf extract at value of 43.04+/-0.34 and 324.75+/-6.01 mg/g, respectively. For 2,2'-azino-bis-3-ethylbenzo-thiazoline-6-sulfonic acid (ABTS) radical scavenging activity analysis at a concentration of 1,000 mu g/mL, 70% ethanol seed extract (94.76+/-0.23%), and 80% methanol leaf extract (95.46+/-0.14%) were observed to have higher activity than those of controls, such as butylated hydroxyl anisole (BHA) (89.60+/-0.00%), butylated hydroxyl toluene (BHT) (84.07+/-0.50%), vitamin C (89.27+/-0.12%), and vitamin E (88.53+/-0.12%). All solvent extracts from leaf showed higher ABTS radical scavenging activity (over 98%) than those of controls with their activity values around 94% (500 g/mL). All extracts from sarcocarp and seed showed superoxide dismutase (SOD)-like activity of 24.46-34.84% on the concentrations (100-1,000 g/mL), and 80% methanol leaf extract showed the highest activity (43.66+/-0.37%) among samples. These results indicate that sarcocarp, seed of dried jujube are all excellent antioxidants, and especially leaf showed higher antioxidant effect than those of vitamin C and E.

• 出版日期2011-2