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KMID : 1007520110200010167
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Food Science and Biotechnology
2011 Volume.20 No. 1 p.167 ~ p.173
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Antioxidant Effects of Solvent Extracts from the Dried Jujube (Zizyphus jujube) Sarcocarp, Seed, and Leaf via Sonication
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Kim Ye-Jin
Son Dae-Yeul
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Abstract
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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 μg/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.
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KEYWORD
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jujube, flavonoid, polyphenol, DPPH radical scavenging, ABTS radical, scavenging, superoxide dismutase (SOD)-like activity
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