Effects of ultrasound-assisted basic electrolyzed water (BEW) extraction on structural and functional properties of Antarctic krill (Euphausia superba) proteins

文献类型： 外文期刊

第一作者： Li, Yufeng

作者： Li, Yufeng;Peng, Zhiyun;Zhu, Yongheng;Liu, Haiquan;Zhao, Yong;Wang, Jing Jing;Zeng, Qiao-Hui;Wang, Jing Jing;Liu, Guang;Wang, Yixiang;Zhu, Yongheng;Liu, Haiquan;Zhao, Yong

作者机构：

关键词： Ultrasound; Basic electrolyzed water; Antarctic krill protein; Structural properties; Emulsions

期刊名称：ULTRASONICS SONOCHEMISTRY （ 影响因子：7.491； 五年影响因子：7.537 ）

ISSN： 1350-4177

年卷期： 2021 年 71 卷

页码：

收录情况： SCI

摘要： A novel protein extraction method of ultrasound-assisted basic electrolyzed water (BEW) was proposed, and its effects on the structural and functional properties of Antarctic krill proteins were investigated. Results showed that BEW reduced 30.9% (w/w) NaOH consumption for the extraction of krill proteins, and its negative redox potential (-800 similar to -900 mV) protected the active groups (carbonyl, free sulfhydryl, etc.) of the proteins from oxidation compared to deionized water (DW). Moreover, the ultrasound-assisted BEW increased the extraction yield (9.4%), improved the solubility (8.5%), reduced the particle size (57 nm), favored the transition of a-helix and beta-turn to beta-sheet, promoted the surface hydrophobicity and disulfide bonds formation of krill proteins when compared to BEW without ultrasound. These changes contributed to the enhanced foam capacity, foam stability and emulsifying capacity of the krill proteins. Notably, all the physicochemical, structural and functional properties of the krill proteins were comparable to those extracted by the traditional ultrasound-assisted DW. This study suggests that the ultrasound-assisted BEW can be a potential candidate to extract proteins, especially offering an alternative way to produce marine proteins with high nutritional quality.

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