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

Cell Potential and Free Energy02:58

Cell Potential and Free Energy

46.7K
Thermodynamics of a Redox Reaction
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
46.7K
Free Energy01:21

Free Energy

52.3K
Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break...
52.3K
What is Energy?04:10

What is Energy?

59.6K
The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized...
59.6K
Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

4.9K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
4.9K
Potential Energy00:52

Potential Energy

42.9K
The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy.
Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
42.9K
Activation Energy01:26

Activation Energy

87.1K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
87.1K

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

State-dependent energy conversion produces degenerate dissipation in active actomyosin networks.

bioRxiv : the preprint server for biology·2026
Same author

Hollow micro-/nanostructures for enhanced pathogen theranostics.

Chemical Society reviews·2026
Same author

The fourfold way to rupture in active solids.

Nature materials·2026
Same author

Crosslinked F-actin networks regulate load-dependent energy conversion.

Communications biology·2026
Same author

Topological control of spontaneous failure in active nematic solids.

Nature materials·2026
Same author

Advances in BRET probes for intracellular target engagement studies.

Nature chemical biology·2026
Same journal

Simple input-output dependencies explain neuronal activity.

Nature physics·2026
Same journal

Scaling and self-similarity in the formation of the embryonic epigenome.

Nature physics·2026
Same journal

Adhesion-driven rigidity transition decoupled from density-driven jamming triggers epithelial organization in embryonic tissues.

Nature physics·2026
Same journal

The local mechanostructural properties of protein cargoes regulate nucleocytoplasmic transport.

Nature physics·2026
Same journal

Squeezing, trisqueezing and quadsqueezing in a hybrid oscillator-spin system.

Nature physics·2026
Same journal

Noise-induced shallow circuits and the absence of barren plateaus.

Nature physics·2026
查看所有相关文章

相关实验视频

Updated: Feb 13, 2026

Determination of Plasma Membrane Partitioning for Peripherally-associated Proteins
11:11

Determination of Plasma Membrane Partitioning for Peripherally-associated Proteins

Published on: June 15, 2018

8.8K

细胞皮层中的能量分割.

Sheng Chen1,2, Daniel S Seara2,3,4, Ani Michaud5,6

  • 1Department of Biomedical Engineering, Yale University, New Haven, CT, USA.

Nature physics
|February 12, 2026
PubMed
概括
此摘要是机器生成的。

细胞在细胞皮层中的化学和机械活动之间分配能量. 这种分离遵循热力学原理,但随着细胞变得更活跃,会分解,影响细胞行为.

更多相关视频

Determination of Lipid Raft Partitioning of Fluorescently-tagged Probes in Living Cells by Fluorescence Correlation Spectroscopy FCS
10:59

Determination of Lipid Raft Partitioning of Fluorescently-tagged Probes in Living Cells by Fluorescence Correlation Spectroscopy FCS

Published on: April 6, 2012

16.7K
Herbs-Partitioned Moxibustion on the Navel in a Rat Model of Primary Dysmenorrhea with Cold Coagulation and Blood Stasis
05:36

Herbs-Partitioned Moxibustion on the Navel in a Rat Model of Primary Dysmenorrhea with Cold Coagulation and Blood Stasis

Published on: October 4, 2024

1.2K

相关实验视频

Last Updated: Feb 13, 2026

Determination of Plasma Membrane Partitioning for Peripherally-associated Proteins
11:11

Determination of Plasma Membrane Partitioning for Peripherally-associated Proteins

Published on: June 15, 2018

8.8K
Determination of Lipid Raft Partitioning of Fluorescently-tagged Probes in Living Cells by Fluorescence Correlation Spectroscopy FCS
10:59

Determination of Lipid Raft Partitioning of Fluorescently-tagged Probes in Living Cells by Fluorescence Correlation Spectroscopy FCS

Published on: April 6, 2012

16.7K
Herbs-Partitioned Moxibustion on the Navel in a Rat Model of Primary Dysmenorrhea with Cold Coagulation and Blood Stasis
05:36

Herbs-Partitioned Moxibustion on the Navel in a Rat Model of Primary Dysmenorrhea with Cold Coagulation and Blood Stasis

Published on: October 4, 2024

1.2K

科学领域:

  • 细胞生物学 细胞生物学
  • 生物物理学的生物物理.
  • 热力学是一种热力学.

背景情况:

  • 生物系统消耗能量来维持远离热力学平衡的秩序.
  • 化学和机械活动中的细胞模式对于细胞表型和行为至关重要.
  • 细胞内能量分割的机制仍然不太清楚.

研究的目的:

  • 研究细胞如何在细胞皮层中的化学和机械活动之间分配内部能量.
  • 确定能量分区,热力学平衡和细胞模式之间的关系.
  • 探索Rho GTPase通路在调节皮层能量动态中的作用.

主要方法:

  • 在细胞皮层的化学和机械子系统中测量生产率.
  • 操纵Rho GTPase通路以诱导各种皮质模式 (脉冲,波动波,迷宫/螺旋波).
  • 在不同的模式动态中分析Onsager互惠和能量分割.

主要成果:

  • 在 Onsager 互惠下,能量在化学和机械子系统之间按比例分配,在较低的活动水平 (断裂波) 上.
  • 的生产速度在互惠的范围内在波动波浪中得到最大化.
  • 互惠性被打破,能量分区变得差异化,因为皮质形成迷宫或螺旋波,解开化学和机械活动.
  • 能量分割和互惠是由化学反应和机械放松时间尺度之间的相互作用决定的.

结论:

  • 细胞能量分区是动态调节的,取决于系统与热力学平衡的接近程度.
  • 随着细胞活动的增加,Onsager互惠的分解意味着能源利用策略的转变.
  • 化学和机械时间尺度之间的平衡决定了细胞如何管理能量,以形成模式和功能.