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Liu, Chang; Liu, Suwen; Li, Runfeng; Zhang, Xixun; Chang, Xuedong
International journal of biological macromolecules, September 2024, Volume: 276, Issue: Pt 2Journal Article
Starch retrogradation is a mechanism that is associated with the quality of starch-based food products. A thorough understanding of chestnut starch retrogradation behavior plays an important role in maintaining the quality of chestnut foods during processing and storage. In this study, we investigated the effects of storage time on the structural properties and in vitro digestibility of gelatinized chestnut starch by using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and solid-state 13C nuclear magnetic resonance (NMR). The results showed that the long-range crystallinity and short-range molecular order of retrograded chestnut starch first rapidly increased from 3 h to 3 d and then decreased from 3 d to 7 d, followed by a slight increase from 7 d to 14 d with retrogradation. With the extension of storage time at 4 °C, there were generally obvious increases in single and double helical structures, which were stacked into long-term ordered structure, resulting in increased enthalpy changes as detected by differential scanning calorimetry spectroscopy (DSC) and reduction of the digestion rate of retrograded chestnut starch. Overall, this study may provide important implications for manipulating and improving the quality of chestnut foods. •Retrogradation behavior and in vitro digestibility of chestnut starch stored at 4 °C from 3 h to14 d were studied.•The molecular order increased and then decreased slightly during retrogradation.•The RS contents increased with the extension of storage time.
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