KMID : 1239920090030020149
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Nutrition Research and Practice 2009 Volume.3 No. 2 p.149 ~ p.155
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Effect of heat treatment of digestion-resistant fraction from soybean on retarding of bile acid transport in vitro
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Han Sung-Hee
Lee Seog-Won Rhee Chul
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Abstract
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In this study, we investigated the heat effect of digestion-resistant fraction (RF) from soybean on retarding bile acid transport in vitro. The RFs from soybean retarded bile acid transport. A raw, unheated RF of soybean (RRF-SOY) was significantly more effective than the heated RF of soybean (HRF-SOY). The RS1 which physically trapped in milled grains and inaccessible to digestive enzyme after 18 hrs incubation level of content in RRF-SOY was found to be as high as 24.1% and after heating the RS1 of HRF-SOY was significantly reduced to 16.8%. The X-ray diffraction pattern of RF from soybean was altered after heat treatment. The RFs from soybean were characterized by peak at diffraction angles of 12.0¡Æ and 20.0¡Æ corresponding to RS content. Cellulose contents of RRF-SOY was 5% higher than that of HRF-SOY and pentosan contents of RRF-SOY was 5% higher than that of HRF-SOY, too. Whereas the hemicellulose content of RRF-SOY was 13% lower than HRF-SOY.
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KEYWORD
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Digestion-resistant fraction, thermal processing, resistant starch, xylose
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