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Isoflavone Contents, Antioxidative and Fibrinolytic Activities of Some Commercial Cooking-with-Rice Soybeans  

Oh, Hae-Sook (Department of Food and Nutrition, Sangji University)
Park, Young-Hoon (Department of Chemistry, Sangji University)
Kim, Jun-Ho (Department of Chemistry, Sangji University)
Publication Information
Korean Journal of Food Science and Technology / v.34, no.3, 2002 , pp. 498-504 More about this Journal
Abstract
Isoflavone (daidzein and genistein) contents, and antioxidative and fibrinolytic activities of seven commercial Korean cooking-with-rice soybeans, including Seonbikong, Chungtae, Gangnamkong, Whangtae, Geodoo, Seolitae, and Wooltalikong were investigated. Daidzein and genistein were not found in Selitae, nor was didzein in Gangnamkong and Geodoo. Total daidzein and genistein levels in Chungtae and Whangtae were 500 and 1550 mg per kg, respectively. Wooltalikong, Whangtae, and Gangnamkong had very high electron donation abilities, over 90%, but Seonbikong and Chungtae showed significantly lower activities. SOD-like activities were also the highest in Gangnamkong and Wooltalikong. Fibrinolytic activities in Seonbikong, Whangtae, and Gangnamkong were similarly strong. Fibrinolytic substances purified from protease inhibitors or activated under various pH or heat treatment conditions, were different among the soybean varieties. This study revealed that, although several cooking-with-rice soybeans were poor in isoflavones, Wooltalikong and Gangnamkong could be good sources for functional products due to their strong antioxidative activities, and heat- and acid-resistant proteolytic abilities.
Keywords
cooking-with-rice soybeans; isoflavone content; electron donating ability; SOD-like activity; fibrinolytic activity;
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