Okara protein extracted by alternating ultrasonic/alkali treatment and its improved physicochemical and functional properties
文献类型： 外文期刊
作者： Lu Tang;Xiaolin Liu;Shiru Bai;Dan Zhao;Xuzhen Guo;Dandan Zhu;Guiying Su;Bei Fan;Bo Wang;Liang Zhang;Fengzhong Wang
作者机构：
关键词： Alkali;Emulsion stability;Functional properties;Okara;Protein;Ultrasound
期刊名称： Ultrasonics Sonochemistry
ISSN： 1350-4177
年卷期： 2024 年 111 卷
页码：
收录情况： SCIE（2024版） ; ; EI（2024版）
摘要： Okara protein (OP) is a potential plant-based protein that is beneficial to human health. In this work, an alternating ultrasonic/alkali treatment method with non-continued cavitation and thermal energy output was used to extract protein (AUA-OP) from okara to enhance the functional properties of OP and improve the stability of OP-based emulsions. The purity of AUA-OP was greater than 80%. Compared with traditional (physical-assisted) alkali treatment, FTIR and SDS-PAGE revealed that AUA-OP retained the chemical structure of the protein, but the number of ultrasound-induced exposure sites increased, with increased fluorescence intensity, surface hydrophobicity, and absolute ζ-potential. After alternating ultrasonic/alkali treatment, the protein particles were looser and smaller. In addition, the water/oil holding capacity, EAI, and ESI of AUA-OP further increased. The viscosity of the AUA-OP-stabilized emulsion was also greater. Finally, a 28-day emulsion storage assay revealed that the AUA-OP-stabilized emulsion was stable with a relatively low droplet size and creaming index, indicating great potential for the development of stable protein-based emulsions.
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