Understanding the multi-scale structure and digestibility of different waxy maize starches.,International Journal of Biological Macromolecules

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Understanding the multi-scale structure and digestibility of different waxy maize starches.
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2019-12-14 , DOI: 10.1016/j.ijbiomac.2019.12.110
Jinchuan Xu ₁ , Ling Chen ₁ , Xinbo Guo ₁ , Yi Liang ₂ , Fengwei Xie ₃

Affiliation

This work concerns different cultivars of waxy maize starch (WMS), from which a significant correlation between the multi-scale structure and the digestibility has been identified. WMSs show a typical A-type crystalline polymorph. The surface porosity of WMS granules facilitates their digestibility. In contrast, the in vitro digestion results indicate that the resistant starch (RS) content increased with higher contents of amylose, single helices, and surface short-range ordered structures. Resistant starch (RS) was found to be made up of single helices and perfect crystallites formed by the fraction of chains with a degree of polymerization (DP) between 13 and 24. Slowly digestible starch (SDS) consists of single helices. Rapidly digestible starch (RDS) is mainly composed of disordered molecular chains in the amorphous regions of starch. This work reveals the relationship between the multiscale structure and digestibility of different WMSs and can provide guidance for the application of WMSs in food or non-food fields.

中文翻译：

了解不同蜡质玉米淀粉的多尺度结构和消化率。

这项工作涉及蜡质玉米淀粉（WMS）的不同品种，从中已经确定了多尺度结构与消化率之间的显着相关性。WMS显示典型的A型晶体多晶型物。WMS颗粒的表面孔隙度有助于其消化率。相反，体外消化结果表明，随着直链淀粉，单螺旋和表面短程有序结构含量的增加，抗性淀粉（RS）含量增加。发现抗性淀粉（RS）由单螺旋和由链数在13至24之间的链段构成的完美微晶组成。慢消化淀粉（SDS）由单螺旋组成。快速消化淀粉（RDS）主要由淀粉无定形区域中的无序分子链组成。

更新日期：2019-12-17

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