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An insight into the quality formation of egg-white sufu based on the dynamic changes of protease activity, physicochemical properties and texture

文献类型： 外文期刊

作者： Chen, Yuqin 1 ; Zhou, Xiangju 1 ; Zhan, Jingyu 1 ; Yan, Bingxu 1 ; Xie, Yihai 1 ; Zang, Jianwei 1 ; Tang, Daobang 2 ; Tu, Yonggang 1 ; Yin, Zhongping 1 ;

作者机构： 1.Jiangxi Agr Univ, Coll Food Sci & Engn, Jiangxi Key Lab Nat Prod & Funct Foods, Nanchang 330045, Peoples R China

2.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Guangdong Key Lab Agr Prod Proc, Key Lab Funct Foods,Minist Agr & Rural Affairs, Guangzhou 510610, Peoples R China

关键词： Sufu; Egg white; Fermentation; Quality characteristics; Physicochemical properties

期刊名称：INTERNATIONAL JOURNAL OF GASTRONOMY AND FOOD SCIENCE （ 影响因子：3.8； 五年影响因子：3.8 ）

ISSN： 1878-450X

年卷期： 2024 年 35 卷

页码：

收录情况： SCI

摘要： Sufu is a delicious traditional Chinese food, mainly produced by fermentation using soybeans as raw material. Egg white is rich in protein and is theoretically an excellent material for sufu processing, however there are few reports on egg-white sufu (EWS) currently, and no such product is available on the market. In this paper, a novel sufu was processed with egg white as main material, and the formation mechanism of its unique quality was explored by monitoring the dynamic changes in the pre-fermentation and post-fermentation stages. The dynamic change curve of protease activity showed an "S" shape, with a peak of 32.33 U/mL on the 4th day of pre-fermentation stage. After a 4-day pre-fermentation and 90-day post-fermentation, most of the proteins in the EWS had been hydrolyzed, and the sufu was moderately soft and delicate in texture, with a hardness of 950.3 g and a total free amino acid content of 19.863 mg/g. SEM and SDS-PAGE detections suggested that the proteins in EWS had been extensively degraded, which led to the formation of its unique texture and flavor. The EWS was slightly better than soybean sufu in terms of texture, fragrance and mouthfeel, with flavor compounds mainly composed of aldehydes and alcohols, resulting in a slightly higher total sensory evaluation score.

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