Insights into the multi-scale structure and digestibility of heat-moisture treated rice starch

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Abstract

The digestibility and structural changes of rice starch induced by heat-moisture treatment (HMT) were investigated, and the relationships among the moisture content–starch structure–starch digestibility were revealed. HMT could simultaneously disorder and reassemble the rice starch molecules across multi-scale lengths and convert some fractions of rapidly-digestible starch (RDS) into slowly-digestible starch (SDS) and resistant starch (RS). In particular, the HMT rice starch with less than 30% moisture content showed a higher SDS + RS content (25.0%). During HMT, SDS and RS were preferably formed by the degraded starch molecules with Mw between 4 × 105 and 4 × 106 g/mol, single helices and amylose-lipids complexes that were formed by degraded starch chains with higher thermal stability and crystalline lamellae with greater thicknesses. Thus, our research suggests a potential approach using HMT to control the digestion of starch products with desired digestibility.

Item Type: Journal Article
Subjects: Q Science > QP Physiology
T Technology > TX Home economics
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Rice, Starch, Digestion
Journal or Publication Title: Food Chemistry
Publisher: Elsevier BV
ISSN: 0308-8146
Official Date: 1 March 2018
Dates:
Date
Event
1 March 2018
Published
7 September 2017
Available
4 September 2017
Accepted
Volume: 242
Page Range: pp. 323-329
DOI: 10.1016/j.foodchem.2017.09.014
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 8 March 2019
Date of first compliant Open Access: 8 March 2019
RIOXX Funder/Project Grant:
Project/Grant ID
RIOXX Funder Name
Funder ID
U1501214
[NSFC] National Natural Science Foundation of China
U1501214
Guangdong Joint Foundation Key Project
UNSPECIFIED
2016YFD04012021
National Basic Research Program of China (973 Program)
UNSPECIFIED
2014YT02S029
YangFan Innovative and Entrepreneurial Research Team Project
UNSPECIFIED
2014A2FC217
The Key R&D Projects of Zhongshan
UNSPECIFIED
2014B090904047
The R&D Projects of Guangdong Province
UNSPECIFIED
31271824
[NSFC] National Natural Science Foundation of China
201607010109
Guangzhou Science and Technology Program key projects
2015KTSCX006
The Innovative Projects for Universities in Guangdong Province
UNSPECIFIED
2015ZZ106
[MEPRC] Ministry of Education of the People's Republic of China
UNSPECIFIED
Australian Synchrotron
URI: https://wrap.warwick.ac.uk/114210/

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