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Published on: August 17, 2022
Key structural characteristics enhancing digestion resistance in rice starch-sugarcane polyphenols complexes
Zhang Tong1, Li Jia-Jiong1, Fu Xiong2
1School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Sugarcane polyphenols (SPE) modify rice starch structure, increasing resistant starch content. This process delays digestion by forming enzyme-resistant V-type structures, offering a natural way to manage blood sugar.
Area of Science:
- Food Science
- Biochemistry
- Nutritional Science
Background:
- Sugarcane polyphenols (SPE) show potential in mitigating hyperglycemia.
- SPE's effect on starch digestion and structural changes requires clarification.
Purpose of the Study:
- Investigate SPE's impact on rice starch (RCS) structure, properties, and digestibility.
- Elucidate the mechanism by which SPE affects starch digestion.
Main Methods:
- Analysis of multi-scale structure and physicochemical properties of RCS-SPE complexes.
- Assessment of time-dependent starch digestibility in the presence of SPE.
Main Results:
- SPE reduced swelling power, gelatinization enthalpy, and short-range order.
- SPE disrupted native starch crystallinity, promoting V-type crystal formation and increasing solubility.
- A 12.03% increase in resistant starch was observed with 30% SPE addition.
Conclusions:
- SPE alters RCS structure, enhancing resistant starch formation.
- Digestion delay is primarily due to reduced enzymatic accessibility via V-type structures, not enzyme inhibition.
- This approach offers a natural dietary strategy for blood sugar regulation and byproduct valorization.
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