Journal ArticleDOI
Thermodynamic analysis of the permeability of biological membranes to non-electrolytes
Ora Kedem,Aharon Katchalsky +1 more
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TLDR
The equations derived here have been applied to various permeability measurements found in the literature, such as the penetration of heavy water into animal cells, permeability of blood vessels, threshold concentration of plasmolysis and relaxation experiments with artificial membranes.About:
This article is published in Biochimica et Biophysica Acta.The article was published on 1958-01-01. It has received 1960 citations till now. The article focuses on the topics: Membrane & Permeability (earth sciences).read more
Citations
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Subzero water permeability parameters and optimal freezing rates for sperm cells of the southern platyfish, Xiphophorus maculatus.
TL;DR: Preliminary empirical experiments suggest that the optimal rate of freezing X. maculatus sperm in the presence of 14% glycerol to be approximately 25 degrees C/min is higher than the theoretically predicted and experimentally determined optimal rates of freezing.
Journal ArticleDOI
Osmotic barrier properties of the rat peritoneal membrane.
El Rasheid Zakaria,Bengt Rippe +1 more
TL;DR: The osmotic conductances assessed here were compatible with an 'overall' peritoneal equivalent small pore radius of 47-48 A, but could also be fitted to a three-pore model ofPeritoneal permselectivity, including a transcellular (ultra-small pore) pathway and a large pore pathway.
Journal ArticleDOI
Modelling of the separation performance and electrokinetic properties of nanofiltration membranes
TL;DR: The mathematical models used to describe the NF process include the following: the nonequilibrium thermodynamic model, structure models and semi-empirical models as discussed by the authors, as well as their applications to the prediction of separation performance.
Journal ArticleDOI
Osmotic regulation in the marine alga, Codium decorticatum - I. Regulation of turgor pressure by control of ionic composition
Mary A. Bisson,John Gutknecht +1 more
TL;DR: In this article, it was shown that at 30 0/00 salinity the major intracellular ions are present in the following concentrations (mmol/kg cell H20): K+, 295; Na+, 255; Cl-, 450.
Journal ArticleDOI
Microfluidic Fabrication of Pluronic Vesicles with Controlled Permeability
Débora F. do Nascimento,Débora F. do Nascimento,Laura R. Arriaga,Max Eggersdorfer,Roy Ziblat,Maria de Fátima Vieira Marques,Franceline Reynaud,Stephan A. Koehler,David A. Weitz +8 more
TL;DR: A microfluidic approach to the production of Pluronic L121 vesicles using double-emulsion drops with ultrathin shells as templates enables control of the vesicle size and results in the efficient encapsulation of hydrophilic ingredients that can be released through the polymer membrane without membrane rupture.
References
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Filtration, diffusion and molecular sieving through peripheral capillary membranes; a contribution to the pore theory of capillary permeability.
TL;DR: Theoretical and experimental studies on the sieving of molecules by ultrafiltration through porous membranes indicate that an effective pore diameter of at least IOO A would be required to explain permeability of this magnitude.
Journal ArticleDOI
Passage of Molecules Through Capillary Walls
TL;DR: A wealth of evidence supports the view that the exchange of materials through the walls of living capillaries takes place by physical processes which involve no expenditure of energy on the part of the capillary endothelial cells themselves.
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Thermodynamics of hyperfiltration (reverse osmosis): criteria for efficient membranes
K.S. Spiegler,Ora Kedem +1 more