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相关概念视频

Phase Transitions02:31

Phase Transitions

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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

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Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
6.1K
Preparation of Diols and Pinacol Rearrangement01:57

Preparation of Diols and Pinacol Rearrangement

3.2K
Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
3.2K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Phase Transitions01:21

Phase Transitions

108
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
108
Phase Diagrams of Ternary Systems01:28

Phase Diagrams of Ternary Systems

155
Consider a ternary system, which is composed of three components: water (W), ethanoic acid (E), and trichloromethane (T). Here, Ethanoic acid (E) is fully miscible with both water (W) and trichloromethane (T), meaning it can mix entirely with either of them. However, water and trichloromethane have partial miscibility, meaning they can only mix to a certain extent, beyond which two separate phases will form.The phase diagram of a ternary system is represented as an equilateral triangle, where...
155

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相关实验视频

Updated: May 3, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
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陶寡合体抵抗相位分离

Lathan Lucas1, Phoebe S Tsoi1, Josephine C Ferreon1

  • 1Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA.

Biomolecules
|March 28, 2025
PubMed
概括
此摘要是机器生成的。

陶氏蛋白质是一种陶氏蛋白质.

关键词:
这就是LLPS.神经退行症的神经退行症的寡合体是tau的寡合体.病理学 病理学病症是一种病症.

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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
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科学领域:

  • 神经科学是一个神经科学.
  • 生物化学 生化学
  • 细胞生物学 细胞生物学

背景情况:

  • 蛋白通过液-液相分离 (LLPS) 促进微管稳定和细胞内运输.
  • 由LLPS驱动的异常Tau聚合是包括阿尔茨海默病在内的tau病的标志.
  • 塔乌的结构变化与其相位分离特性之间的确切联系尚未完全理解.

研究的目的:

  • 为了研究的寡合化如何影响其液-液相分离 (LLPS) 行为.
  • 为了区分单体,寡体和氨基体体物种的相分离能力.
  • 阐明陶氏结构状况在病态聚合和凝结形成中的作用.

主要方法:

  • 动态光散射 (DLS) 来监测随时间的推移的Tau寡合体形成.
  • 光显微镜可视化和评估Tau相分离和凝结物形成.
  • 提奥夫拉T (ThT) 染色以表征寡合体成熟阶段.

主要成果:

  • 单体很容易经历LLPS形成凝结物.
  • 增加寡合化逐渐降低其LLPS倾向,尽管寡合物仍然可以相位分离效率较低.
  • 在早期阶段,ThT-负的tau寡合体被招募到年轻tau的凝结物中,而成熟的ThT-阳性寡合体被排除在外.

结论:

  • 的结构状态,特别是它的寡合体形式,动态调节其液态液相分离 (LLPS) 行为.
  • 陶寡合物的成熟阶段决定了它们与现有的陶凝结物的相互作用,影响聚合途径.
  • 了解Tau LLPS和寡合化之间的相互作用对于破译Tau病变和开发针对tau病变的向疗法至关重要.