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Title:
On soliton propagation in biomembranes and nerves
Authors:
Heimburg, Thomas; Jackson, Andrew D.
Affiliation:
AA(The Niels Bohr Institute, University of Copenhagen, 17 Blegdamsvej, 2100 Copenhagen Ø, Denmark), AB(The Niels Bohr Institute, University of Copenhagen, 17 Blegdamsvej, 2100 Copenhagen Ø, Denmark)
Publication:
Proceedings of the National Academy of Sciences, Volume 102, Issue 28, pp. 9790-9795.
Publication Date:
07/2005
Category:
BIOPHYSICS, BIOLOGICAL SCIENCES
Origin:
PNAS
Keywords:
sound, action potential, compressibility, Hodgkin-Huxley theory
DOI:
10.1073/pnas.0503823102
Bibliographic Code:
2005PNAS..102.9790H

Abstract

The lipids of biological membranes and intact biomembranes display chain melting transitions close to temperatures of physiological interest. During this transition the heat capacity, volume and area compressibilities, and relaxation times all reach maxima. Compressibilities are thus nonlinear functions of temperature and pressure in the vicinity of the melting transition, and we show that this feature leads to the possibility of soliton propagation in such membranes. In particular, if the membrane state is above the melting transition solitons will involve changes in lipid state. We discuss solitons in the context of several striking properties of nerve membranes under the influence of the action potential, including mechanical dislocations and temperature changes.

Author contributions: T.H. and A.D.J. designed research, performed research, analyzed data, and wrote the paper.

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