pH 对乳制品饮料稳定性的影响,这些饮料用可溶性大豆多糖稳定
Hongyang Pan1,2, Xiaofang Chu3, Shiwen Li4
1State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China.
Foods (Basel, Switzerland)
|November 13, 2025
概括
pH值显著影响乳制品饮料的稳定性,可溶性大豆多糖化物 (SSPS) 在pH值6-7时提供最佳稳定性. 由于蛋白质聚合,在pH 5时稳定性最低.
科学领域:
- 食品科学 食品科学 食品科学
- 合体和表面化学
背景情况:
- 可溶性大豆多糖化物 (SSPS) 用作乳制品饮料中的稳定剂.
- 了解pH对SSPS蛋白相互作用的影响对于饮料的稳定性至关重要.
研究的目的:
- 为了研究pH值对SSPS稳定乳制品饮料稳定性的影响.
- 为了确定乳制品系统中SSPS稳定性的最佳pH值范围.
主要方法:
- 模型乳制品饮料系统具有不同的pH值 (3-7) 准备使用蛋白质和SSPS.
- 稳定性通过离心,颗粒大小,z电位,粘度和LUMisizer分析来评估.
主要成果:
- 乳制品饮料的稳定性呈现出一个U形曲线的pH值,从pH值3下降到pH值5的最低值,然后增加到pH值7.
- 在pH 5时,在牛奶蛋白的异电点附近,发生了显著的SSPS-蛋白聚合,增加了粘度,减少了z-潜力.
- 在pH 6-7下观察到最佳稳定性,其特点是小颗粒大小,高z电位和最小的聚合,归因于静电排斥和硬质阻碍.
结论:
- SSPS稳定乳制品饮料的pH依赖性稳定性主要由SSPS蛋白相互作用和体电荷决定.
- 在中性到轻微酸性pH (6-7),SSPS有效地稳定乳制品饮料,而在轻微酸性范围 (pH5) 中,稳定性受到损害.
- 这些发现为优化乳制品饮料配方通过精确的pH控制提供了宝贵的见解.
相关概念视频
Solvating Effects
8.4K
An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
8.4K
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
186
Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
186
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
649
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
649
Colloids
20.6K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
20.6K
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
485
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
485
Factors Affecting Solubility
36.6K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
36.6K


