Covalent interactions between walnut protein isolate and chlorogenic acid impact the formation, structure, functionality and emulsions stability of the isolates

共价键 绿原酸 热稳定性 化学 Zeta电位 嫁接 乳状液 抗氧化剂 溶解度 聚丙烯酰胺凝胶电泳 色谱法 化学工程 有机化学 聚合物 纳米颗粒 工程类
作者
Mu-Guo Tang,Min Yang,Lan-Ke Xu,Yuanli Wang,Liang Tao,Jiahe Dai,Jun Sheng,Yang Tian
出处
期刊:Lebensmittel-Wissenschaft & Technologie [Elsevier BV]
卷期号:199: 115991-115991 被引量:7
标识
DOI:10.1016/j.lwt.2024.115991
摘要

Covalents were prepared from chlorogenic acid (CA) and walnut isolated protein (WNPI) by free radical grafting technique and their conformations, functional properties and emulsions stability were investigated. Meanwhile, WNPI-CA covalents were used as a raw material for the preparation of walnut oil emulsions, and the static and dynamic stability of walnut oil emulsions were investigated.The results showed that covalent binding with CA changed the molecular structure and morphology of WNPI, as confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and various spectroscopic techniques methods.The binding of CA with WNPI significantly improved its antioxidant activity, solubility, emulsification properties, foaming, and thermal stability. In addition, the stability of walnut oil emulsions were improved, as evidenced by Zeta potential, rheology, etc. In vitro simulated digestion showed that the WNPI-CA covalents emulsions maintained better antioxidant capacity compared to the WNPI emulsions. In conclusion, this study demonstrates the potential application of WNPI-CA covalents formed by free radical grafting as carriers of functional ingredients in foods and in improving the stability of plant proteins.
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