期刊
CARBOHYDRATE POLYMERS
卷 270, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118367
关键词
Starch noodles; Retrograded starch; Ordered structure; XRD; ATR-FTIR
资金
- Jiangsu Agricultural Industry Technology System [JATS-2020-424]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [080820830]
Research found that temperature and storage time during long-term storage can induce structural changes in retrograded starch gel, leading to increased crystallinity initially but potential disorganization with extended time, resulting in decreased double helix and water mobility.
Temperature-induced structural variations of retrograded starch gel during long-term storage were investigated in a real food system (wet starch noodles). Fresh starch noodles presented a B-type XRD pattern containing 8.82% crystallinity and 16.04% double helices. In the first 2 weeks, double helices of starch chain formed long-range ordered structure leading to increased crystallinity, and such structural transformation was positively correlated with increasing storage temperature (from 4 degrees C to 35 degrees C) and storage time. However, with the extension of storage time to 12 weeks, the disorganization of supra-molecular structure was likely to be observed by decreased crystallinity, double helix and water mobility. Besides, we propose that the area and intensity of Raman band at 2910 cm-1 can be a good indicator for evaluating perfection of crystallinity in starch noodles. These results contributed to a better understanding of mechanisms underlying molecular order changes of retrograded starch gel product during long-term storage.
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