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http://dx.doi.org/10.3746/jkfn.2010.39.3.406

Physicochemical Property and Antioxidative Activity of Hot-Water Extracts from Enzyme Hydrolysate of Astragalus membranaceus  

Kwon, Sang-Chul (Chamsunjin Food Co. Ltd.)
Choi, Goo-Hee (Dept. of Food Science and Technology, Chungju National University)
Hwang, Jong-Hyun (Dept. of Food Science and Technology, Chungju National University)
Lee, Kyung-Haeng (Dept. of Food Science and Technology, Chungju National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.39, no.3, 2010 , pp. 406-413 More about this Journal
Abstract
To enhance the yield and bioactivity of hot-water extract from herbal medicine, Astragalus membranaceus was hydrolyzed with carbohydrases, such as ClariSEB and Fungamyl. After hot-water extracts were prepared from each hydrolysate (HW-C/F), physicochemical property, antioxidant activity and sensory property were evaluated. The solid content ($^{\circ}Brix$) of HW-C/F was higher than hot-water extract from A. membranaceus no treated enzyme (control). Although pH of HW-C/F was lower than that of the control, the acidity was higher. Lightness of Hunter's color values was increased in HW-C/F whereas redness and yellowness were decreased. The contents of reducing sugar, flavonoid and polyphenol of HW-C/F were higher than the control but the content of ascorbic acid was not different from control. The inhibitory activity of HW-C/F against lipid peroxidation was slightly higher than control, but DPPH radical scavenging, ABTS reducing, metal chelating activities were significantly increased by HW-C/F. The sensory evaluation also revealed that the sensory panelists preferred HW-C/F to that of control. Therefore, hydrolysis by carbohydrases for preparation of hot-water extract from A. membranaceus is one of the good methods to improve antioxidative activity and sensory property of hot-water extract.
Keywords
Astragalus membranaceus; enzyme treatment; antioxidative activity; physicochemical and sensory property;
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Times Cited By KSCI : 9  (Citation Analysis)
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