相关实验视频
Updated: Sep 19, 2025

07:48
Engineering a Bilayered Hydrogel to Control ASC Differentiation
Published on: May 25, 2012
14.0K
基化奇多的乳化和稳定能力
Tatiana N Popyrina1, Nadejda A Aksenova2, Anastasia A Shilkova3
1Enikolopov Institute of Synthetic Polymeric Materials RAS, 70 Profsoyuznaya st., Moscow 117393, Russia; Moscow Aviation Institute (National Research University), 4 Volokolamskoe sh., Moscow 125993, Russia.
International journal of biological macromolecules
|June 7, 2025
概括
与未经修改的基托相比,基化基托具有优越的乳化和稳定性,用于制造乳液和可生物降解的微粒. 高度的基化奇托提高了乳液稳定性和微粒的产量.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 体科学 体科学 体科学
背景情况:
- 酸盐是一种生物聚合物,在药物输送和生物材料中具有潜在的应用.
- 修改基托桑的化学结构可以增强其功能性质.
- 了解乳化和稳定机制对于微粒制造至关重要.
研究的目的:
- 为了比较基化基与未经改性基的乳化和稳定能力.
- 评估基托桑修饰对简单乳液和聚酸微粒的影响.
- 为了研究基托溶液特性与乳液/微粒物质特性之间的关系.
主要方法:
- 使用油/水乳液溶剂蒸发制备简单乳液和聚化物微粒.
- 乳液性质的表征:滴滴大小,大小分布,稳定性,乳化活性和乳化稳定性.
- 微粒子特性分析:产量,大小,形态和表面组成.
- 评估基托桑溶液的特性:粘度,表面张力和水友性脂友性平衡 (HLB).
主要成果:
- 与未经修改的基托相比,基化基托在测试度 (0.5-2 wt%) 中表现出增强的乳化和稳定能力.
- 高度的基化奇托导致乳液稳定性改善,滴滴尺寸缩小,粘度增加,HLB降低,表面张力降低.
- 基化奇托导致了更高的可生物降解微粒总产量,平均尺寸更小.
结论:
- 化显著改善了桑的乳化和稳定性能.
- 基化奇托是一种更有效的乳化剂,用于生产稳定的乳液和高质量的可生物降解微粒.
- 这些发现表明,基化奇托是先进配方和药物输送系统的有前途材料.
相关概念视频
Relative Stabilities of Alkenes
14.3K
The relative stability of alkenes can be determined by comparing their heats of hydrogenation. The lower heat of hydrogenation indicates the more stable alkene. The three main factors determining the relative stability of alkenes are i) the number of substituents attached to the double-bond carbon atoms, ii) hyperconjugation, and iii) the stereochemistry of the double bond.
14.3K
Colloids
18.0K
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...
18.0K
Stability of Substituted Cyclohexanes
13.1K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
13.1K
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
3.6K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
3.6K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.7K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.7K
Solvating Effects
7.9K
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...
7.9K

