Document Detail


Membrane Transport Generated by the Osmotic and Hydrostatic Pressure. Correlation Relation for Parameters L(p), σ, and ω.
MedLine Citation:
PMID:  23345729     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Standard approach to membrane transport generated by osmotic andhydrostatic pressures, developed by Kedem and Katchalsky, is based onprinciples of thermodynamics of irreversible processes. In this paper wepropose an alternative technique. We derive transport equations from fewfairly natural assumptions and a mechanistic interpretation of the flows.In particular we postulate that a sieve-type membrane permeability isdetermined by the pore sizes and these are random within certain range.Assuming that an individual pore is either permeable or impermeable tosolute molecules, the membrane reflection coefficient depends on the ratioof permeable and impermeable pores. Considering flows through permeableand impermeable pores separately, we derive equations for the total volumeflux, solute flux and the solvent flux across the membrane. Comparing themechanistic equations to the Kedem-Katchalsky equations we find the formereasier to interpret physically. Based on the mechanistic equations we alsoderive a correlation relation for the membrane transport parameters L(p),σ, and ω. This relation eliminates the need for experimentaldetermination of all three phenomenological parameters, which in somecases met with considerable difficulties.
Authors:
M Kargol; A Kargol
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biological physics     Volume:  26     ISSN:  0092-0606     ISO Abbreviation:  J Biol Phys     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2013-01-24     Completed Date:  2013-01-25     Revised Date:  2013-05-30    
Medline Journal Info:
Nlm Unique ID:  0417731     Medline TA:  J Biol Phys     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  307-20     Citation Subset:  -    
Affiliation:
Physics Institute, Świçe tokrzyska Academy, 25-406 Kielce, Poland.
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