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Yu, Zhihui; Zhang, Huirong; Guo, Haoran; Zhang, Lixin; Zhang, Xiaoyu; Chen, Yisheng
Ultrasonics sonochemistry, 05/2022, Letnik: 86Journal Article
Display omitted •HIU treatment enhanced the springiness and gumminess of marinated egg.•The zeta potential and hydrophobicity of protein gels improve after HIU.•HIU at 100 W affects rheological behaviors by boosting non-covalent bonds.•The aggregation behaviors are due to the decrease in α-helix while the increase in β-turn.•The porous network structure and in vitro digestibility were also enhanced after HIU. In this study, high intensity ultrasonication (HIU) was employed as an efficient tool to improve the gel property and in vitro digestibility of marinated egg (ME). The effects of HIU treatment at 100 W and 200 W for a series of time periods (0.5 h, 1 h, and 2 h) on the textural profiles, structural changes, and microstructures were also studied. After HIU treatment, the springiness and gumminess of ME white were enhanced. The water holding capacity reached the highest point (66.6%) when 0.5 h 200 W HIU was used. It was observed that 100 W HIU led to the highest zeta potential (-12.0 mV) and hydrophobicity (175.35 μg) of ME, indicating a high degree of electrostatic repulsion prevented agglomeration. HIU treatment at 100 W affected the dynamic rheological behaviors by boosting non-covalent bonds, which maintains the gel network's homogeneity. Meanwhile, the decreasing formation of α-helix, in contrast to β-turn, altered the aggregation behaviors of egg white gel. The microstructure of the 200 W HIU treated samples had porous colloidal network structures, and the in vitro digestibility (>75%) was increased after HIU. This work demonstrated that HIU could be a green and cost-effective tool for processing the egg product with high quality.
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