Transient behaviour of a polymer dragged through a viscoelastic medium

被引：7

作者：

Vandebroek, Hans ^{[1
]}

Vanderzande, Carlo ^{[1
,2
]}

机构：

[1] Hasselt Univ, Fac Sci, B-3590 Diepenbeek, Belgium

[2] KULeuven, Inst Theoret Fys, B-3001 Heverlee, Belgium

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 141卷 / 11期

关键词：

STRONG FLOWS; TRANSLOCATION;

D O I：

10.1063/1.4895613

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We study the dynamics of a polymer that is pulled by a constant force through a viscoelastic medium. This is a model for a polymer being pulled through a cell by an external force, or for an active biopolymer moving due to a self-generated force. Using the Rouse model with a memory dependent drag force, we find that the center of mass of the polymer follows a subballistic motion. We determine the time evolution of the length and the shape of the polymer. Through an analysis of the velocity of the monomers, we investigate how the tension propagates through the polymer. We discuss how polymers can be used to probe the properties of a viscoelastic medium. (C) 2014 AIP Publishing LLC.

引用

页数：9

共 27 条

[1]

Boal D., 2012, MECH CELL

[2] Nonequilibrium microtubule fluctuations in a model cytoskeleton [J].

Brangwynne, Clifford P. ;

Koenderink, Gijsje H. ;

MacKintosh, Frederick C. ;

Weitz, David A. .

PHYSICAL REVIEW LETTERS, 2008, 100 (11)

[3] DEFORMATIONS OF ONE TETHERED CHAIN IN STRONG FLOWS [J].

BROCHARDWYART, F .

EUROPHYSICS LETTERS, 1993, 23 (02) :105-111

[4] POLYMER-CHAINS UNDER STRONG FLOWS - STEMS AND FLOWERS [J].

BROCHARDWYART, F .

EUROPHYSICS LETTERS, 1995, 30 (07) :387-392

[5] Enhanced diffusion in active intracellular transport [J].

Caspi, A ;

Granek, R ;

Elbaum, M .

PHYSICAL REVIEW LETTERS, 2000, 85 (26) :5655-5658

[6]

Doi M., 1986, THEORY POLYM DYNAMIC

[7] Scaling the microrheology of living cells [J].

Fabry, B ;

Maksym, GN ;

Butler, JP ;

Glogauer, M ;

Navajas, D ;

Fredberg, JJ .

PHYSICAL REVIEW LETTERS, 2001, 87 (14) :148102/1-148102/4

[8] Mittag-Leffler Functions and Their Applications [J].

Haubold, H. J. ;

Mathai, A. M. ;

Saxena, R. K. .

JOURNAL OF APPLIED MATHEMATICS, 2011,

[9] Anomalous transport in the crowded world of biological cells [J].

Hoefling, Felix ;

Franosch, Thomas .

REPORTS ON PROGRESS IN PHYSICS, 2013, 76 (04)

[10]

Howard J., 2001, MECH MOTOR PROTEINS, Vxvi, P367

← 1 2 3 →