聚乙醇复合物形成的阿尔金酸盐和基托寡糖化物受其比例和阿尔金酸盐分子量的影响
Nan Wang1, Jie Tian1, Linlin Wang1
1SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, National & Local Joint Engineering Laboratory for Marine Bioactive Polysaccharide Development and Application, Liaoning Key Laboratory of Food Nutrition and Health, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
International journal of biological macromolecules
|June 16, 2024
概括
藻酸盐 (SA) 和基托寡糖化物 (COS) 形成多电解质复合物 (PEC),取决于SA的分子量和比例. 最佳条件产生稳定的复合体,为食品开发提供了洞察力.
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
- 生物化学 生物化学
背景情况:
- 藻酸盐 (SA) 和寡糖 (COS) 是普遍存在的食品添加剂.
- 了解它们的相互作用是开发新型食品产品的关键.
- 由SA和COS形成的多电解质复合物 (PEC) 具有独特的特性.
研究的目的:
- 研究SA分子量和SA/COS比对PEC形成的影响.
- 描述SA/COS PECs的特性和稳定性.
- 阐明推动PEC形成的相互作用机制.
主要方法:
- 变化的粘度-SA的平均分子量 (Mv).
- 调整SA/COS权重比率 (w/w). 在此过程中,
- 在不同的条件下分析复杂的形成,形态和稳定性.
主要成果:
- SA/COS PEC的形成是由静电相互作用 (-COOH和-NH2) 和键 (OH) 驱动的.
- 具有Mv≥2.16 × 10^6 Da的SA形成球形复合体.
- 确定了1.73 × 10^7 Da的最佳SA Mv,用于复杂的形成.
- SA/COS比率≥0.8对于复杂的形成是不利的.
- 与肠道状况相比,PEC在模拟的胃状况下表现出更大的稳定性.
结论:
- SA/COS PECs的形成和特性受到SA分子量和相对量的显著影响.
- 最佳的SA Mv和比率对于成功的PEC形成至关重要.
- SA/COS PEC表现出差异稳定性,在酸性环境中稳定性提高.
- 这项研究为在创新的食品配方中利用SA和COS提供了基础知识.
相关概念视频
01:19Complexation Equilibria: The Chelate Effect
498
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
498
03:45Formation of Complex Ions
23.6K
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...
23.6K
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
360
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
360
01:22EDTA: Chemistry and Properties
1.9K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.9K
01:06Coagulation
280
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
280
00:56Extraction: Advanced Methods
446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446