Journal
FOOD CHEMISTRY
Volume 344, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.128697
Keywords
Non-isothermal starch gelatinization; Mathematical decomposition; Differential scanning calorimetry; Starch structure-property relations
Funding
- National Natural Science Foundation of China [32001646]
- Youth Fund of Jiangsu Natural Science Foundation [BK20190906]
- Jiangsu Entrepreneurship and Innovation Phd Program
- Yangzhou Lvyangjinfeng Talent Program
- Jiangsu Yangzhou Key Research and Development Program [SSF2018000008]
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A mathematical model was developed in this study to parameterize the gelatinization thermograms of starch effectively, revealing hidden features and sub-components. Analysis of nine different starches from various plant origins indicated the existence of semi-crystalline lamellae with different thermal stabilities in native starch granules.
Starch gelatinization under non-isothermal conditions with limited moisture content is a common industrial process involved in the processing of many starchy foods, while the nature of its asymmetric differential scanning calorimetry thermograms is still undefinable. This study for the first time developed a kinetics-based mathematical model, which could yield a parameterization of gelatinization thermograms that are essentially the same as experimental ones. Even more, the model is capable of decomposing gelatinization thermograms into kinetics-based sub-patterns, and revealing hidden features. By applying this newly developed methodology to nine starches with different plant origins and correlated with their lamellar structures, the results indicated that distinctly arranged groups (sub-components) of semi-crystalline lamellae with different thermal stabilities are existed in the native starch granules. This gives ways to better understand starch structure-property relations, and suggests useful directions for food manufactures to produce functional foods by understanding and differentially controlling the starch gelatinization sub-components.
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