Abstract
Four varieties of barley starches, W.B. Merlin, glacier, high amylose glacier, and high amylose hull-less glacier, were isolated from barley seeds. Apparent and absolute amylose contents, molecular size distributions of amylose and amylopectin, amylopectin branch-chainlength distributions, and Naegeli dextrin structures of the starches were analyzed. W.B. Merlin amylopectin had the longest detectable chain length of DP 67, whereas glacier, high amylose glacier and high amylose hull-less glacier amylopectins had the longest detectable chain length of DP 82, 79, and 78, respectively. All the four starches displayed substantially reduced proportions of chains at DP 18-21. Amylopectins of high amylose varieties did not ' Journal Paper No. J-18096 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project No. 3258. ^ Graduate student and Professor, respectively. Department of Food Science and Human Nutrition and Center for Crops Utilization Research, Iowa State University. ^ Corresponding author
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