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

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 pr...

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Bibliographic Details
Published in:Ultrasonics Sonochemistry
Main Authors: Yufeng Li, Qiao-Hui Zeng, Guang Liu, Zhiyun Peng, Yixiang Wang, Yongheng Zhu, Haiquan Liu, Yong Zhao, Jing Jing Wang
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2021
Subjects:
Ultrasound
Basic electrolyzed water
Antarctic krill protein
Structural properties
Emulsions
Chemistry
QD1-999
Acoustics. Sound
QC221-246
Antarctic
Antarc*
Antarctic Krill
Euphausia superba
Online Access:https://doi.org/10.1016/j.ultsonch.2020.105364
https://doaj.org/article/c7e8323e068747f4b63b62b50a3ade15
Description
Summary: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 ~ −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 α-helix and β-turn to β-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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