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Titolo:
UNEXPECTED DYNAMICS IN SHAPE FLUCTUATIONS OF BILAYER VESICLES
Autore:
YEUNG A; EVANS E;
Indirizzi:
UNIV BRITISH COLUMBIA VANCOUVER BC V6T 1W5 CANADA
Titolo Testata:
Journal de physique. II
fascicolo: 10, volume: 5, anno: 1995,
pagine: 1501 - 1523
SICI:
1155-4312(1995)5:10<1501:UDISFO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
RED-BLOOD-CELLS; FLUID MEMBRANES; PHOSPHOLIPID-VESICLES; CURVATURE ELASTICITY; THERMAL FLUCTUATIONS; BENDING ELASTICITY; STERIC INTERACTION; ADHESION; UNDULATIONS; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
A. Yeung e E. Evans, "UNEXPECTED DYNAMICS IN SHAPE FLUCTUATIONS OF BILAYER VESICLES", Journal de physique. II, 5(10), 1995, pp. 1501-1523

Abstract

Fluid lipid bilayers are composed of two mono-molecular sheets held together by weak van der Waals forces. Except for viscous resistance, the monolayers are Gee to slide relative to one another - giving rise to a ''hidden'' degree of freedom within the composite structure. In this paper, important effects of interlayer coupling are demonstrated through their influence on the static and dynamic features of undulatingbilayer vesicles. In particular, it is shown that the non-local bending elasticity can modulate mean square undulatory amplitudes with a long wavelength suppression similar to that of membrane tension; the twoeffects are indistinguishable on the basis of spectral analysis. Withregard to conformational dynamics, we show that the two dissipative mechanisms - namely interlayer drag and conventional hydrodynamics - are important on different length scales. With the crossover length being a fraction of a mu m, it is concluded that viscous resistance to conformational changes is dominated by interlayer dissipation in the mesoscopic regime.

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Documento generato il 27/10/20 alle ore 09:46:03