相关实验视频
Updated: Aug 14, 2025

Introduction to Solid Supported Membrane Based Electrophysiology
Published on: May 11, 2013
在充电逆细胞中的酸池中的质子运输的高度改变状态
Hongxia Hao1, Ellen M Adams2,3, Sarah Funke4
1Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, California94720, United States.
在充电的反向微粒 (RMs) 中显著阻碍质子传输. 像NaAOT和CTABr这样的充电表面活性剂阻碍了质子跳跃,
科学领域:
- 物理化学
- 计算化学
- 材料科学
背景情况:
- 反向微粒 (RMs) 是用于限制水溶液的多功能纳米结构.
- 对于催化和生物过程来说,了解狭窄环境中的质子运输至关重要.
- 在RM中充电的表面活性剂可以显著改变受限液体的特性.
研究的目的:
- 用充电表面活性剂研究反向细胞 (RMs) 中的质子传输机制.
- 将模拟结果与实验光谱数据 (TeraHertz吸收和介电松) 相关联.
- 阐明表面活性物电荷在封闭的酸性池中的质子动力学的作用.
主要方法:
- 使用反应力场模拟来建模质子动力学.
- 分析的重点是二甲基酸盐 (NaAOT) 和三甲基化 (CTABr) 的运输机制.
- 与非离子RM和实验光谱特征进行比较.
主要成果:
- 与非离子RM相比,NaAOTRM中抑制了质子跳跃.
- 在CTABr RM中完全抑制了原子运输的Grotthuss机制.
- 充电的头组和对面组改变了界面离子度,增加了RM中的有效pH.
- 在反离子/基附近的质子定位阻碍了Eigen和Zundel配置,有利于局部振荡跳跃.
结论:
- 充电的表面活性剂在反向中显著阻碍质子运输.
- 观察到的缓慢质子动态归因于静电相互作用和局部pH值的改变.
- 局部振荡跳跃变得占主导地位,特别是在CTABrRM中,导致质子停留时间延长.
更多相关视频
12:15Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy
Published on: February 21, 2019
08:09A Micro-agar Salt Bridge Electrode for Analyzing the Proton Turnover Rate of Recombinant Membrane Proteins
Published on: January 7, 2019
相关概念视频
ATP Driven Pumps I: An Overview
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
Pore Transport and Ion-Pair Transport
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Electron Transport Chain Components
ATP Driven Pumps III: V-type Pumps
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
Chemiosmosis and ATP Synthesis
pH Regulation in Cells
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...