par Gallez, Dominique 
;Bisch, Paulo Mascarello ;Sanfeld, Albert
Référence Bioelectrochemistry and Bioenergetics, 5, 2, page (401-410)
Publication Publié, 1978
;Bisch, Paulo Mascarello ;Sanfeld, Albert Référence Bioelectrochemistry and Bioenergetics, 5, 2, page (401-410)
Publication Publié, 1978
Article révisé par les pairs
| Résumé : | This theoretical study shows that one of the important functions of biological cells, i.e. the deformation of the cell membrane, may be initiated by electrochemical phenomena. The membrane is considered as an interface between two immiscible fluids. A linear normal mode analysis of the deformational instability of this interface is done. The role of an ionic or dipolar lipid layer and of the adsorption of Ca2+ is discussed. For highly concentrated solutions, the effects induced by diffuse layers may be neglected, and the stability depends on the change in interactions between individual charges and dipoles. The secular equation shows that the electrical terms will give a negative stabilizing contribution to the surface tension. A new destabilizing effect appears, due to the existence of charges or dipoles images. When a far-from-equilibrium chemical reaction occurs at the surface, such as the cooperative adsorption of Ca2+ which induces a lipid phase transition, the system may also be destabilized. © 1978. |
