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

Lookup NU author(s): Professor David XieORCiD

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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.

Publication metadata

Author(s): Qiao D, Yu L, Liu H, Zou W, Xie F, Simon G, Petinakis E, Shen Z, Chen L

Publication type: Article

Publication status: Published

Journal: Carbohydrate Polymers

Year: 2016

Volume: 144

Pages: 271-281

Print publication date: 25/06/2016

Online publication date: 10/03/2016

Acceptance date: 22/02/2016

Date deposited: 10/10/2023

ISSN (print): 0144-8617

ISSN (electronic): 1879-1344

Publisher: Elsevier

URL: https://doi.org/10.1016/j.carbpol.2016.02.064

DOI: 10.1016/j.carbpol.2016.02.064

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