Journal
FOOD HYDROCOLLOIDS
Volume 54, Issue -, Pages 10-22Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2015.09.016
Keywords
High-amylose rice; Heterogeneous starch granule; In vitro digestion properties; Resistant starch; Structural properties of undigested starch residues
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Funding
- Ministry of Science and Technology of China [2012CB944803]
- National Natural Science Foundation of China [31270221, 31570324]
- Qing Lan Project of Jiangsu Province
- Innovation Program for Graduates of Jiangsu Province [KYLX15_1386]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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High-amylose rice endosperm contains polygonal, aggregate, elongated, and hollow starch granules. In this study, in vitro digestion properties of native starches and structural properties of undigested starch residues were investigated. The polygonal and aggregate starches had monophasic digestograms and the elongated and hollow starches had biphasic digestograms from 0 to 8 h of digestion, but only the digestions of polygonal and aggregate starches were well fitted by first-order kinetics. The elongated and hollow starches were rapidly degraded in first 20 min of digestion, but had high resistance to degradation after 2 h of digestion. The polygonal and aggregate starches had side-by-side digestions of amylose and amylopectin as well as crystalline and amorphous components, but amylose and amorphous component of elongated and hollow starches were rapidly degraded in first 20 min of digestion. The B-type allomorph in aggregate, elongated, and hollow C-type starches contributed to the resistance to digestion. (C) 2015 Elsevier Ltd. All rights reserved.
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