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

Dongling Qiao; Long Yu; Hongsheng Liu; Wei Zou; Fengwei Xie; George Simon; Eustathios Petinakis; Zhiqi Shen; Ling Chen

doi:10.1016/j.carbpol.2016.02.064

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

Carbohydr Polym. 2016 Jun 25:144:271-81. doi: 10.1016/j.carbpol.2016.02.064. Epub 2016 Mar 10.

Authors

Dongling Qiao¹, Long Yu², Hongsheng Liu³, Wei Zou⁴, Fengwei Xie⁵, George Simon⁶, Eustathios Petinakis⁷, Zhiqi Shen⁷, Ling Chen³

Affiliations

¹ CPFRR, College of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Department of Materials Engineering, Monash University, Melbourne, VIC 3168, Australia; CSIRO, Manufacturing, Melbourne, VIC 3168, Australia.
² CPFRR, College of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China; Department of Materials Engineering, Monash University, Melbourne, VIC 3168, Australia. Electronic address: [email protected].
³ CPFRR, College of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China.
⁴ Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD 4072, Australia.
⁵ Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia; School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia. Electronic address: [email protected].
⁶ Department of Materials Engineering, Monash University, Melbourne, VIC 3168, Australia.
⁷ CSIRO, Manufacturing, Melbourne, VIC 3168, Australia.

PMID: 27083818
DOI: 10.1016/j.carbpol.2016.02.064

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.

Keywords: 4-Hydroxybenzhydrazide (PubChem CID: 1742); Alkali treatment; Amylose/amylopectin ratio; Ethanol (PubChem CID: 702); In vitro digestion; Maltose (PubChem CID: 10991489); Multi-scale structure; Sodium azide (PubChem CID: 33557); Sodium hydroxide (PubChem CID: 14798); Starch; Starch (PubChem CID: 24836924); Water (PubChem CID: 962).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alkalies / chemistry*
Amylose / chemistry*
Amylose / metabolism
Digestion
Kinetics
Temperature

Substances

Alkalies
Amylose