Effects of Proteins and Mineral Ions on the Physicochemical Properties of 1,3-Dioleoyl-2-Palmitoylglycerol Emulsion to Mimic a Liquid Infant Formula.
Effects of Proteins and Mineral Ions on the Physicochemical Properties of 1,3-Dioleoyl-2-Palmitoylglycerol Emulsion to Mimic a Liquid Infant Formula.
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蛋白质和矿物质离子对模拟液体婴儿配方奶粉的 1,3-二油酰-2-棕榈酰甘油乳液的理化性质的影响
DOI：
10.3389/fnut.2022.808351
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发表时间：
2022
影响因子：
5
通讯作者：
Zhu, Xuemei
中科院分区：
文献类型：
--
作者：
Wang, Qi;Xu, Yuxi;Liu, Yanchen;Qian, Fang;Mu, Guangqing;Zhu, Xuemei
婴幼儿配方奶粉中的蛋白质和矿物质不仅是营养物质，而且对乳状液的物理和化学稳定性有重要影响。以碳酸钙(0或9.08 mM)和氯化钾(0或15.96 mM)为代表，按不同比例(10：0、9：1、6：4、5：5和0：10)添加到乳清分离蛋白(WPI)和酪蛋白酸钠(CN)的1，3-二油酰-2-棕榈酸甘油(OPO)乳状液中。通过分析乳状液的颗粒大小、Zeta电位、乳状液指数、流变性、贮存稳定性和脂肪氧化等，考察了蛋白质和矿物质对乳状液稳定性的影响。1，3-二油酰基-2-棕榈酸甘油(OPO)乳状液中加入钙离子后，乳状液的粒度指数、乳化度指数增大，Zeta电位值降低。二价离子可影响脂滴之间的静电相互作用和离子表面吸附的相互作用效应。此外，在相同的离子类型条件下，不同蛋白质比例对乳状液物理稳定性的影响不显著。在化学稳定性方面，只用CN稳定的乳状液的氧化值比用WPI稳定的乳状液高。研究表明，蛋白质比例和矿物质含量对OPO乳状液的稳定性有重要影响，可为液态婴儿配方奶粉的开发利用提供参考。
Proteins and minerals in infant formula not only serve as nutrients, but also have important effects on the physical and chemical stability of emulsions. In this study, calcium carbonate (0 or 9.08 mM) and potassium chloride (0 or 15.96 mM), as representatives of divalent and monovalent minerals, were added to 1,3-dioleoyl-2-palmitoylglycerol (OPO) emulsions in different ratios (10:0, 9:1, 6:4, 5:5, and 0:10) of whey protein isolate (WPI) and sodium caseinate (CN). The influence of proteins and minerals on emulsion stability was investigated by analyzing particle size, zeta potential, creaming index, rheological properties, storage stability, and lipid oxidation. 1,3-dioleoyl-2-palmitoylglycerol (OPO) emulsions could be destabilized by adding Ca2+, as shown by the increase in particle size index, creaming index, and the decrease in zeta potential magnitude. Divalent ions could affect the electrostatic interactions between lipid droplets and the interactive effects of ion surface adsorption. In addition, the effect of different protein ratios on the physical stability of emulsions was not significant under the same ion-type conditions. In terms of chemical stability, higher oxidized values were found in emulsions stabilized with only CN than in those containing WPI. Our study showed that protein ratios and minerals played an important role in the stability of OPO emulsions, which might provide a reference for the development and utilization of liquid infant formula.
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