Work

Impact of crystalline type on starch-polyphenol complexation under sequential gelatinization and ultrasonication

Year: 2026

Type: article

Abstract: Inhibiting starch digestion is an effective approach to regulate postprandial blood glucose levels, and ultrasound assisted modification has emerged as a promising non-thermal strategy to tailor starch structure and functionality. In this study, sequential treatment of gelatinization and ultrasonication at varying amplitudes were employed to assess the impact of the interaction between different types of starch crystallinity (A, B, and C type) with red rice bran polyphenols. The results demonstrated moderate amplitude at 60% provided optimal ultrasound condition, significantly enhancing polyphenol binding and promoting molecular rearrangement across all starch types. B type starch exhibited the highest polyphenol binding capacity. In contrast, A and C type starches showed more pronounced increases in crystalline order and thermal stability, indicating stronger molecular reorganization under ultrasound stress. X-ray diffraction revealed no new peaks among all starch types, indicating that complexation occurred via non V-type interactions. Amplitude of ultrasound at 60% effectively reduced rapidly digestible starch while increasing slowly digestible and resistant starch fractions, resulting in a lower estimated glycemic index within the medium range (65-68). These findings elucidate the role of ultrasonic cavitation in modulating starch-polyphenol interactions and demonstrate how starch crystalline structure governs complexation behavior and digestion resistance. Overall, the present study contributes a promising strategy for the development of functional food ingredients, particularly for slowing down the digestibility.

Source: Ultrasonics Sonochemistry

DOI: 10.1016/j.ultsonch.2026.107834

Authors: Sandra Kusumawardani, Naphatrapi Luangsakul

Institution: King Mongkut's Institute of Technology Ladkrabang

Language: English

Topic: Food composition and properties

Subfield: Nutrition and Dietetics

Field: Nursing

Domain: Health Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $3,710