文章基本信息

标题：Swelling Pressure of Wet Rice Grains Estimated from Distribution Coefficients of Saccharides
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作者：Yuki Sha ; Shuji Adachi
期刊名称：Journal of Applied Glycoscience
印刷版ISSN：1344-7882
电子版ISSN：1880-7291
出版年度：2016
卷号：63
期号：2
页码：47-50
DOI：10.5458/jag.jag.JAG-2016_001
出版社：The Japanese Society of Applied Glycoscience
摘要：The apparent density and porosity of four rice cultivars, Koshihikari, Yumepirika, Habutaemochi, and Kitayukimochi, decreased and increased, respectively, with the increasing temperature in the range of 5 °C to 60 °C. Especially large changes in both apparent density and porosity were observed at 60 °C, which can be ascribed to the starch gelatinization of rice. The swelling pressures of wet rice grains were estimated to be 7.5, 6.3, 6.2, and 5.9 MPa at 25 °C for Koshihikari, Yumepirika, Habutaemochi, and Kitayukimochi, respectively, from the distribution coefficients of solutes with different molar volumes. Rice grains having higher amylose content exhibited a weak tendency toward higher swelling pressure. The distribution coefficients of fructose for the Koshihikari and Habutaemochi cultivars were larger at higher temperatures, but the temperature dependence of the swelling pressure was not significant for both cultivars. These results suggested that the increase in the distribution coefficient was caused by the gradual relaxation of the interior structure of rice with increasing temperature.