Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Distillation: Vapor–Liquid Equilibria01:01

Distillation: Vapor–Liquid Equilibria

5.7K
Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
5.7K
Thin-Layer Chromatography (TLC): Overview01:11

Thin-Layer Chromatography (TLC): Overview

6.8K
Thin-layer chromatography (TLC) is a chromatography technique that separates compounds based on their polarity. TLC typically uses polar silica gel, a form of silicon dioxide, as the stationary phase. The silica gel contains hydroxyl (OH) groups on its surface, which form hydrogen bonds with polar compounds, influencing their adhesion to the stationary phase.
To begin the analysis, a mixture of compounds is spotted on the starting line on the TLC plate using a thin capillary. The bottom of the...
6.8K
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

2.0K
In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
2.0K
Two Components: Liquid–Liquid Systems01:27

Two Components: Liquid–Liquid Systems

133
A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
133
Nonideal Two-Component Liquid Solutions01:29

Nonideal Two-Component Liquid Solutions

105
Nonideal liquid solutions, also known as real solutions, do not strictly follow Raoult's law. Raoult's law is a rule of thumb in physical chemistry. However, not all mixtures adhere to this law due to varying molecular interactions. For example, in an acetone/chloroform solution, the individual vapor pressures of the components are lower than expected, resulting in a total vapor pressure below that predicted by Raoult's law, causing a negative deviation.On the other hand, in an ethanol/water...
105
Solid–Solid Solutions01:24

Solid–Solid Solutions

108
The temperature-composition phase diagram of two solids, A and B, which are immiscible in the solid phase but form miscible liquids, shows that when the temperature is low, these two exist as separate, pure solids (A and B). As the temperature increases, they transition into a single-phase liquid solution where A and B coexist. Moving from point a1 to a2 in the phase diagram, the composition changes such that solid B begins to separate from the solution, enriching the remaining liquid with A.
108

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

A large thigh hibernoma in a 23-years-old man: Case report.

International journal of surgery case reports·2024
Same author

Periodic Bedrock Ridges at the ExoMars 2022 Landing Site: Evidence for a Changing Wind Regime.

Geophysical research letters·2021
Same author

Comment on "Inverse Square Lévy Walks are not Optimal Search Strategies for d≥2".

Physical review letters·2021
Same author

Regional surname affinity: A spatial network approach.

American journal of physical anthropology·2018
Same author

Cascading Failures in Interdependent Networks with Multiple Supply-Demand Links and Functionality Thresholds.

Scientific reports·2017
Same author

Corrigendum: Recovery of Interdependent Networks.

Scientific reports·2017

相关实验视频

Updated: Apr 12, 2026

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
12:37

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

13.1K

产生液态-液态相转换的通用机制.

G Franzese1, G Malescio, A Skibinsky

  • 1Center for Polymer Studies and Department of Physics, Boston University, Massachusetts 02215, USA. franzese@argento.bu.edu

Nature
|February 24, 2001
PubMed
概括
此摘要是机器生成的。

具有明显的高密度液体 (HDL) 和低密度液体 (LDL) 阶段. 这种液体-液体过渡是由特定的相互作用潜力解释的,即使没有密度异常,也挑战了当前的理解.

更多相关视频

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

11.2K
On-Chip Octanol-Assisted Liposome Assembly for Bioengineering
09:45

On-Chip Octanol-Assisted Liposome Assembly for Bioengineering

Published on: March 17, 2023

3.7K

相关实验视频

Last Updated: Apr 12, 2026

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
12:37

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

13.1K
Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

11.2K
On-Chip Octanol-Assisted Liposome Assembly for Bioengineering
09:45

On-Chip Octanol-Assisted Liposome Assembly for Bioengineering

Published on: March 17, 2023

3.7K

科学领域:

  • 物理化学 物理化学
  • 材料科学 材料科学 材料科学
  • 计算物理 计算物理

背景情况:

  • 最近的实验显示,是一种单元系统,表现出高密度液体 (HDL) 和低密度液体 (LDL) 阶段.
  • 在水,和碳等各种材料中观察到液体-液体过渡,但缺乏通用的解释.
  • 超冷水,液态碳和的现有模型预测了LDL-HDL临界点,但缺乏统一的解释.

研究的目的:

  • 为发生低密度液体 (LDL) 和高密度液体 (HDL) 阶段提供一般解释.
  • 建立特定相互作用潜力与LDL和HDL阶段的形成之间的直接联系.
  • 调查在缺乏密度异常的系统中液体-液体过渡的可能性.

主要方法:

  • 原子间相互作用潜力的理论分析.
  • 分子动力学模拟 (从背景中暗示).
  • 对单元系统的实验数据进行比较.

主要成果:

  • LDL和HDL阶段的存在与具有吸引力部分和两个短距离排斥距离的相互作用潜力直接相关.
  • 这种类型的相互作用潜力在单元液体中很常见,包括液体金属.
  • 关键的是,即使在没有密度异常的系统中,LDL和HDL阶段也可能出现.

结论:

  • 提出了一个一般的理论框架,以了解单元系统中的液体-液体过渡.
  • 这些发现表明,潜在的相互作用潜力,不一定是密度异常,决定了LDL-HDL过渡.
  • 这项工作提出了一个实验性挑战,即在像液体金属这样的系统中寻找液体-液体过渡,而不论密度异常.