Effects of pH-shifting treatments on the emulsifying properties of rice protein isolates: Quantitative analysis of interfacial protein layer
文献类型: 外文期刊
第一作者: Shen, Qian
作者: Shen, Qian;Dai, Hongmin;Wen, Luming;Zheng, Wei;Li, Beixi;Li, Bin;Chen, Yijie;Dai, Jun;Chen, Yijie;Chen, Yijie
作者机构:
关键词: Rice protein isolate (RPI); pH-shifting treatment; Interfacial adsorption; Quantitative proteomics; Emulsion; Interfacial rheology
期刊名称:FOOD RESEARCH INTERNATIONAL ( 影响因子:8.1; 五年影响因子:7.7 )
ISSN: 0963-9969
年卷期: 2023 年 164 卷
页码:
收录情况: SCI
摘要: For the limitation of poor solubility and interfacial adsorption capacity of rice protein isolates (RPI), in this work the effects of pH-shifting treatments on the emulsifying properties of RPI were investigated. The results showed that the particle size of the emulsion stabilized by alkaline pH-shifting treated RPI was smaller than that sta-bilized by acid pH-shifting treated RPI. In addition, the RPI-10 stabilized emulsion showed a more uniform particle size distribution, which was explained by its high emulsifying activity and stability (EAI: 49.5 m2/g, ESI: 59.5 min). The interface rheology results showed that the alkaline pH-shifting treatment could promote the protein rearrangement and subsequently formed interface film with higher rate of protein penetration and rearrangement. The quantitative analysis of adsorbed proteins in the RPI-10 stabilized emulsion showed that glutelin-type isoforms as major proteins in RPI were increased at the oil-water interface for their balanced distribution of the hydrophilic and hydrophobic amino acid group. These quantitative and interfacial rheology analysis could improve deep understanding of the interfacial properties of pH-shifting treated RPI, and promote the development of application in grain protein stabilized emulsion.
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