Berlin 2005 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

AKB: Biologische Physik

AKB 100: Poster Session I

AKB 100.50: Poster

Samstag, 5. März 2005, 16:45–18:45, Poster TU D

Dynamics of Semiflexible Polymers in Simple Flow — •Tobias Munk¹, Chris H. Wiggins², and Erwin Frey¹ — ¹Ludwig-Maximilians-Universität, München — ²Columbia University, New York

In this poster we address the question how a single stiff polymer moves in a two-dimensional viscous fluid environment. The model system we refer to is the biopolymer actin. The polymer is represented by a continuous two-dimensional space curve with a fixed length and a curvature-dependent bending energy. Furthermore we account for the constraint of inextensibility by introducing a Lagrange multiplier function into the hamiltonian. By invoking suitable eigenfunctions we obtain a system of coupled first order stochastic differential equations of the Langevin type, which can be solved numerically. In addition to the behaviour in shear flow and its relatives we study the polymer’s behaviour in external electric fields. Thus we are able to study e.g. single trajectories and autocorrelation functions.