대두를 이용하여 천연보존료나 건강 기능성식품을 개발하기 위하여 백태와 태광으로 청국장을 제조하여 물과 70% 에탄올로 추출한 후, 폴리페놀 함량, 항산화능 및 혈전용해능을 측정하였다. 백태와 백태 청국장에 대한 물추출물의 폴리페놀 함량은 각각 189.25 mg/100g, 814.58 mg/100g 이었으며 태광과 태광 청국장에 대한 물추출물의 폴리페놀 함량은 각각 210.23 mg/100g, 834.23 mg/100g으로 대두 청국장 물추출물의

To develop natural preservatives or functional health foods from soybeans (Baektae and Taekwang), the antioxidant and fibrinoytic activities of the water and 70% (v/v) ethanol extract of soybeans and fermented soybean paste (Chungkukjang) were examined. The polyphenol contents of water extracts from Baektae and Baektae Chungkukjang were 189.25 mg/100 g and 814.58 mg/100 g, respectively, whereas those from Taekwang and Taekwang Chungkukjang were 210.23 mg/100 g and 834.23 mg/100 g. The polyphenol contents of the water extracts from Chungkukjang was 4.0~4.3-fold higher than those from soybean. The electron-donating abilities (EDAs) and superoxide dismutase-(SOD)-like activities of the water and ethanol extracts from Chungkukjang were higher than those of the extracts from soybean. Both extracts were found to have had fibrinolytic activity, and the highest activity was present in the water extracts of Baektae Chungkukjang. The polyphenol contents and antioxidative and fibrinolytic activities of the extracts from Chungkukjang were higher than those of the other soybean extracts. These results indicate that Chungkukjang can be used as a material for health foods or natural antioxidants.

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