Nonequilibrium Thermodynamics of Ion Transport through Membranes

Nonequilibrium Thermodynamics of Ion Flux through Membrane Channels

Ion flux through membrane channels is passively driven by the electrochemical potential differences across the cell membrane. Nonequilibrium thermodynamics has been successful in explaining transport mechanisms, including the ion transport phenomenon. However, physiologists may not be familiar with biophysical concepts based on the view of entropy production. In this paper, I have reviewed the ...

Selective Mass Transport of CO2 Containing Mixtures through Zeolite Membranes

In this work, the main aspects regarding the permeation of mixtures containing CO2 and permanent gases such as H2 , N2 and CH4 through zeolite membranes have been investigated, focusing on the description of the mass transport mechanisms taking place inside the pores. First, a brief overview about the performance of the main zeolite membranes used in gas separation (e.g. DDR, CHA, AEI, FAU, etc...

Hybrid Molten/Solid In2O3-Bi2O3 Oxygen Ion Transport Membranes

The hybrid molten/solid In2O3 - 30-48 wt.% Bi2O3 oxide materials were studied with respect to their transport properties. The conductivities, oxygen ion transport numbers and oxygen permeation fluxes have been measured by using the four-probe DC, volumetric measurements of the faradaic efficiency and gas flow techniques, respectively. We show that the...

Molecular aspects of channel formation and ion transport through membranes

A summary Is presented of theoretlcal studles almlng at a better understandlng of the coupling propertles of polypeptlde a-helical segments. and of their aggregation into bundles of various sizes capable of encloslng channels apt to transport Ions through biological membranes. The molecular aspects are stressed. INTRODUCTION Blologlcal membranes surround the cells and thelr varlous compartments...

Boronic acid mediated ion transport through bilayer membranes