Interactions of Several Bile Acids with Hemicelluloses from Several Varieties of Rice

Abstract

ABSTRACT Purified and crude preparations of rice hemicellulose from rice bran, whole rice (brown rice), and milled rice were incubated with four bile acids (cholic, glycocholic, taurocholic, and glycotaurocholic acids) under in vitro conditions of pH, temperature, salinity, time for interaction and so forth to approximate conditions normally found in the intestinal tract. The amounts of bile acids bound gradually increased as the concentration of rice extract increased for all rice varieties, with whole rice extract or rice bran extract. Results suggest an effect of growing areas on the binding properties of rice bran and milled rice.