Abstract
Ultrasonic was employed to improve the functional properties of wheat gluten. The results showed their solubility, emulsifying capacity and emulsion stability index of ultrasonically treated wheat gluten gradually increased as the ultrasonic power and treatment time increase, when ultrasonic treated for 20min at 240W, the solubility, emulsifying capacity and emulsion stability reached the maximum, then the solubility slightly decreased when the ultrasonic power exceeded 240W. However, the forming capacity and foam stability of ultrasonically treated gluten samples gradually increased with ultrasonic power and treatment time increasing. Gel Permeation Chromatography (GPC) observations revealed that the molecular weight of gluten decreased as the ultrasonic power increased, implying that the molecular of wheat gluten was broken by ultrasonic. Lower molecular weight of wheat gluten showed better functional properties.
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