Energy Barrier for an Ion Crossing an Intra-Membrane Channel
Alexei V. Finkelstein, Dmitry N. Ivankov, Alexander M. Dykhne
Abstract
We present a simple approximate analytical estimate for self-energy of a charge in the middle of cylindrical channel of a high permittivity epsilon1 in a media of a low permittivity epsilon2 (for the cases of infinitely long and comparatively short channels) and show that this estimate is in a good quantitative agreement with exact solution of Poisson equation. Further, using these estimates, we explain the observed a lower conductivity, caused by an increased the self-free-energy for ions, whose diameter is by ~1 angstrom less than that of the channel (as compared to ions, whose diameter is equal to that of the channel).
Create a lesson
Related papers
A Variational Framework for Nonlinear Chemical Thermodynamics Employing the Maximum Energy Dissipation Principle
Adam Moroz
Retrievable but Unencountered: The Missing Exposure Denominator in Large Academic Ebook Collections
Jette Veenstra, Mauricio Munoz Arias
Where Energy Is Spent Sets the Depth of Kinetic Proofreading
Uğur Çetiner
On the Role of Dispersion in One Model of Propagation of Elastic Excitations in Nerves
Alexander I. Kozlov
Quantifying the Biophysical Properties of Red Blood Cells in Gaucher Disease
Zhaojie Chai, Marine de Person, Pierre A. Buffet et al.
Roles of vortices and turbulent eddies in particle preferential concentration and deposition in the human respiratory tract
Mengtao Li, Yawei Wang, Wentao Feng et al.