期刊
FOOD CHEMISTRY
卷 369, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.131000
关键词
Keyword; Retrogradation kinetics; Consecutive reaction kinetics model; Chain-length distribution
资金
- National Natural Science Foundation of China [32001646]
- Natural Science Foundation of Jiangsu Province [BK20190906]
- Jiangsu Provincial Entrepreneurial and Innovation Phd Program
A consecutive reaction kinetics model (CRK) was developed in this study to fit long-term retrogradation kinetics curves for 10 rice starches with distinct molecular structures. Results showed that the nucleation and crystal growth steps of starch retrogradation were controlled by distinct starch fine molecular structures, providing practical applications for regulating the nutritional properties of starch-based foods.
Starch retrogradation involves nucleation and crystal growth steps, while their relative contribution to the overall retrogradation kinetics and relations with starch fine molecular structures have not been elucidated. In this study, a consecutive reaction kinetics model (CRK) was developed to fit long-term retrogradation kinetics curves for 10 rice starches with distinct molecular structures. Starch chain-length distributions (CLDs) and melting enthalpy kinetics curves for these starches were obtained from our published data. It was shown that these melting enthalpy kinetics curves can be satisfactorily deconvoluted by the CRK model into a combination of nucleation and crystal growth curves. Correlation analysis between CRK model-fitted parameters with starch CLDs showed that starch retrogradation nucleation and crystal growth steps were controlled by distinct starch fine molecular structures. These results have practical applications, as it enables a separate regulation of nucleation and crystal growth steps during retrogradation process of starch-based foods for desirable nutritional properties.
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