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Effects of Reheating Methods on Rheological and Textural Characteristics of Rice Starch with Different Gelatinization
Jiani Jiang1, Jiangtao Li1, Wenfang Han1
1National Engineering Research Center of Rice and Byproduct Deep Processing, School of Food Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China.
Abstract:
Pregelatinized starch (PGS) is often used to improve the processing quality of foodstuffs, but little attention has been paid to the effects of different reheating methods and degree of starch gelatinization (DSG) on their rheological and textural properties. In this study, pregelatinized rice starches (RS) with gelatinization degrees ranging from 58% to 100% were prepared via different Rapid Visco Analyser (RVA) heating procedures and reheated in various methods, including high-power microwave (HM), low-power microwave (LM), and water bath. The rheological behavior and textural properties were explored, and the results demonstrated that the consistency, gel strength, hardness, and springiness of PGS in all tested samples decreased significantly after reheating. The storage modulus (G') of PGS increased dramatically while the thermal stability decreased. Interestingly, the reheating methods possessed various effects on the starch of different DSG.
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