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Artículo

Thermodynamics of irreversible processes approach applied to explain the functional responsiveness of lipid membranes

Cejas, Jimena del PilarIcon ; Rosa, Antonio SebastiánIcon ; González Paz, Agustín NicolásIcon ; Frías, María de los ÁngelesIcon ; Disalvo, Edgardo AnibalIcon
Fecha de publicación: 11/2024
Editorial: Research Trends
Revista: Trends in Physical Chemistry
ISSN: 0972-4435
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biofísica

Resumen

The lipid membrane interphase is treated as a binary solution composed of polar head groups, with their hydration shells sunk in water, different from the bulk. This type of water is exchangeable with adjacent media according to the lateral surface pressure and water activity. Thus, the water influxes and effluxes at constant temperature and in the absence of an electric field, driven by the changes in surface pressure (surface tension) and the osmotic gradient (water activity), are coupled through phenomenological coefficients reflecting water-lipid and lipid-water frictions that relate to the diffusion of water in lipids and diffusion of lipids in water as described by the thermodynamics of irreversible processes (TIP) approach. Thus, the experimental surface pressure/area per molecule isotherms for monolayers can be fitted satisfactorily in contrast to the classical gas model. Hydrogen bond arrangements between water and membrane components determine a unique surface tension of water (surface free energy profile). Each surface pressure/water activity pair defines a particular steady state of the interphase, which explains its responsive behavior when chased by physical and chemical perturbations.
Palabras clave: SURFACE , INTERPHASE , PERTURBATIONS , WATER
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/259523
URL: http://www.researchtrends.net/tia/abstract.asp?in=0&vn=23&tid=16&aid=7366&pub=20
Colecciones
Articulos (CIBAAL)
Articulos de CENTRO DE INVESTIGACION EN BIOFISICA APLICADA Y ALIMENTOS
Citación
Cejas, Jimena del Pilar; Rosa, Antonio Sebastián; González Paz, Agustín Nicolás; Frías, María de los Ángeles; Disalvo, Edgardo Anibal; Thermodynamics of irreversible processes approach applied to explain the functional responsiveness of lipid membranes; Research Trends; Trends in Physical Chemistry; 23; 11-2024; 69-84
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