| Membrane Transport Generated by the Osmotic and Hydrostatic Pressure. Correlation Relation for Parameters L(p), σ, and ω. | |
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MedLine Citation:
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PMID: 23345729 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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M Kargol; A Kargol |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biological physics Volume: 26 ISSN: 0092-0606 ISO Abbreviation: J Biol Phys Publication Date: 2000 Dec |
Date Detail:
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Created Date: 2013-01-24 Completed Date: 2013-01-25 Revised Date: 2013-04-08 |
Medline Journal Info:
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Nlm Unique ID: 0417731 Medline TA: J Biol Phys Country: Netherlands |
Other Details:
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Languages: eng Pagination: 307-20 Citation Subset: - |
Affiliation:
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Physics Institute, Świçe tokrzyska Academy, 25-406 Kielce, Poland. |
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