Insights into the hierarchical structure and digestion rate of alkali-modulated starches with different amylose contents

Qiao, Dongling, Yu, Long, Liu, Hongsheng, Zou, Wei, Xie, Fengwei, Simon, George, Petinakis, Eustathios, Shen, Zhiqi and Chen, Ling (2016) Insights into the hierarchical structure and digestion rate of alkali-modulated starches with different amylose contents. Carbohydrate Polymers, 144 271-281. doi:10.1016/j.carbpol.2016.02.064


Author Qiao, Dongling
Yu, Long
Liu, Hongsheng
Zou, Wei
Xie, Fengwei
Simon, George
Petinakis, Eustathios
Shen, Zhiqi
Chen, Ling
Title Insights into the hierarchical structure and digestion rate of alkali-modulated starches with different amylose contents
Journal name Carbohydrate Polymers   Check publisher's open access policy
ISSN 0144-8617
1879-1344
Publication date 2016-06-25
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.carbpol.2016.02.064
Open Access Status Not Open Access
Volume 144
Start page 271
End page 281
Total pages 11
Place of publication Doetinchem, The Netherlands
Publisher Elsevier
Collection year 2017
Language eng
Formatted abstract
Combined analytical techniques were used to explore the effects of alkali treatment on the multi-scale structure and digestion behavior of starches with different amylose/amylopectin ratios. Alkali treatment disrupted the amorphous matrix, and partial lamellae and crystallites, which weakened starch molecular packing and eventually enhanced the susceptibility of starch to alkali. Stronger alkali treatment (0.5% w/w) made this effect more prominent and even transformed the dual-phase digestion of starch into a triple-phase pattern. Compared with high-amylose starch, regular maize starch, which possesses some unique structure characteristics typically as pores and crystallite weak points, showed evident changes of hierarchical structure and in digestion rate. Thus, alkali treatment has been demonstrated as a simple method to modulate starch hierarchical structure and thus to realize the rational development of starch-based food products with desired digestibility.
Keyword Abbreviation RMS regular maize starch
G50 Gelose 50 starch
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

 
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