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Antioxidative activity of water extracts from the yam ( Dioscorea opposita Thunb.) tuber mucilage tororo
Author(s) -
Nagai Takeshi,
Suzuki Nobutaka,
Nagashima Toshio
Publication year - 2006
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.200500231
Subject(s) - dioscorea , mucilage , chemistry , food science , enzyme , superoxide , functional food , biochemistry , botany , biology , pathology , medicine , alternative medicine
A water extract as a viscous solution was obtained from the yam Dioscorea opposita tuber mucilage tororo , and its functional properties were demonstrated. The protein content was about 280 μg/mL extract, and the main protein bands with an MW of ∼33 kDa without 2‐mercaptoethanol (2‐ME) and ∼31 kDa with 2‐ME were detected by SDS‐PAGE. The water extract possessed high antioxidative activity and scavenging activities against superoxide anion and hydroxyl radicals. However, it showed no inhibitory activity against angiotensin I‐converting enzyme. The yam tuber contains relatively high contents of vitamins, different micro‐ and macroelements, enzymes, and dietary fibers. The yam D. opposita tuber will be increasingly regarded as a health‐promoting food.