水离子含量对牛奶蛋白缩物凝性质的影响
Yanbing Xu1,2, Xilong Zhou2, Junhui Diao2,3
1School of Life Sciences, Shanghai University, Shanghai, China.
Frontiers in nutrition
|January 28, 2026
概括
水中的微量离子显著影响牛奶蛋白缩物 (MPC) 的凝性质. 即使是低离子水平也会改变凝的微观结构和水容量,这是由于离子相互作用造成的.
科学领域:
- 食品科学 食品科学 食品科学
- 材料科学 材料科学 材料科学
- 体科学 体科学 体科学
背景情况:
- 乳蛋白缩物 (MPC) 凝在食品中广泛使用.
- 水质,特别是微量离子含量,是食品加工中的关键因素.
- 了解对MPC凝的离子影响对于优化食品质感和稳定性至关重要.
研究的目的:
- 研究不同水类中的微量离子对MPC凝形成和特性的影响.
- 描述离子组合在调节MPC凝微结构,水容量和风湿学中的作用.
- 阐明离子影响MPC凝网络结构的机制.
主要方法:
- 使用超纯,反透 (RO) 和沸的自来水制备MPC分散剂.
- 分析水的离子组成,分散导电性和泽塔电位.
- MPC凝微结构的特征,保持水的容量,和质性质.
主要成果:
- 与超纯水相比,煮沸的自来水,含有适度的离子含量 (1.4 mmol/L),显著改变了MPC凝特性.
- 用沸的自来水形成的MPC凝呈现出更密集的微观结构,但弹性模量和持水能力较低.
- 在煮沸的自来水中,双价离子 (Ca2+,Mg2+) 度较高导致了预聚和不充分的交叉链接.
结论:
- 水中的微量离子在MPC凝中起着关键的调节作用,影响网络形成和功能性质.
- 离子的特定类型和度,特别是双价离子,决定了预聚合和最终凝结构的程度.
- 虽然离子含量会影响凝性质,但低水平的RO和沸的自来水导致了类似的大变形形行为和外观.
相关概念视频
01:19Body Water Content and Fluid Compartments
4.1K
Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions...
4.1K
02:41Concentration Cells
25.8K
A concentration cell is a type of a voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
Consider the following voltaic cell:
Consider the following voltaic cell:
25.8K
03:11Precipitation of Ions
30.2K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.2K
01:21G-Protein Gated Ion Channels
5.7K
GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
Sensory...
5.7K
03:24Common Ion Effect
46.4K
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 Châtelier’s principle. Consider the dissolution of silver iodide:
46.4K
03:45Formation of Complex Ions
26.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.0K