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Ultrasound-assisted enzymatic digestion for efficient extraction of proteins from quinoa

文献类型： 外文期刊

作者： Yang, Chao 1 ; Liu, Wenyu 2 ; Zhu, Xijin 1 ; Zhang, Xuejian 3 ; Wei, Yuming 2 ; Huang, Jie 2 ; Yang, Farong 2 ; Yang, Fumin 1 ;

作者机构： 1.Gansu Agr Univ, Coll Food Sci & Engn, Lanzhou 730070, Peoples R China

2.Gansu Acad Agr Sci, Anim Husb Pasture & Green Agr Inst, Lanzhou 730070, Peoples R China

3.Gansu Agr Univ, Pratacultural Coll, Lanzhou 730070, Peoples R China

关键词： Ultrasound; Enzymatic extraction; Quinoa; Protein; Morphological structure

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.0； 五年影响因子：6.0 ）

ISSN： 0023-6438

年卷期： 2024 年 194 卷

页码：

收录情况： SCI

摘要： This study aimed to investigate the potential synergistic impact of ultrasound and enzyme on the extraction of quinoa protein, to enhance its extraction yield and modify its functional properties. The highest protein extraction rate (26.72 %) was achieved under the following conditions: power, 400 W; time, 210 min; pH, 10.0; temperature, 50 degrees C; and amount of alkaline proteinase, 1.668 kat. The ultrasound process, due to its elevated shear, mechanical energy, and cavitation, enhanced the solubility of the substrate, rendering it more easily accessible to the enzyme. Consequently, this acceleration of the chemical reaction resulted in an improved protein yield. The optimized conditions of ultrasound-assisted enzymatic treatment effectively induced alterations in the structure of quinoa protein. The findings from the analysis of surface hydrophobicity, particle sizes, sulfhydryl content, fourier transform infrared spectroscopy, atomic force microscopy, and scanning electron microscopy collectively demonstrated the unfolding of protein molecules and the exposure of hydrophobic and sulfhydryl groups following treatment. Additionally, compared to single ultrasound and non-ultrasound procedures, the protein produced by this process had higher solubility (86.40 %), higher emulsifying activity (100.44 m(2)/g), better foaming capacity (122.45 %), superior water/oil-binding capacity. Hence, the ultrasound-assisted enzymatic method exhibits potential as a suitable technique for enhancing both the quantity and quality of quinoa protein. Furthermore, this study contributes to the establishment of a theoretical framework for the incorporation of quinoa protein within the realm of food processing.

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