结晶度
解聚
直链淀粉
淀粉
层状结构
化学
食品科学
抗性淀粉
无定形固体
化学工程
消化(炼金术)
结晶学
材料科学
高分子化学
色谱法
工程类
作者
Xiaoqing Lei,Shuo Wang,Yali Li,Ho Jae Han,Xinying Zhang,Xiaoyun Mao,Yamei Ren
标识
DOI:10.1016/j.foodres.2024.113931
摘要
The comprehensive understanding of multi-scale structure of starch and how the structure regulates the pasting/digestion properties remain unclear. This work investigated the effects of γ-ray irradiation with different doses on multi-scale structure and pasting/digestion properties of potato starch. Results indicated that γ-ray at lower doses (< 20 kGy) had little effect on micromorphology of starch, increased mainly the amylose content and the thickness of amorphous region while decreased crystallinity, double helix content and lamellar ordering. With the increase of dose, the internal structure of large granules was destroyed, resulting in the depolymerization of starch to form more short-chains and to reduce molecular weight. Meanwhile, amylose content decreased due to the depolymerization of amylose. The enhanced double helix content, crystallinity, lamellar ordering and structural compactness manifested the formation of the thicker and denser starch structure. These structure changes resulted in the decreased viscosity, the increased stability and anti- digestibility of paste.
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