Berlin 2005 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 7: SYMPOSIUM: Polymer networks and beyond: From molecular structure to materials and biological functions II
CPP 7.3: Vortrag
Samstag, 5. März 2005, 11:45–12:00, TU C243
Hydrodynamic theory of active polar gels — •Karsten Kruse1, Jean-François Joanny2, Frank Jülicher1, Jacques Prost2,3, and Ken Sekimoto2,4 — 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden — 2Physicochimie Curie (CNRS-UMR168), Institut Curie, Section de Recherche, 26 rue d’Ulm, 75248 Paris Cedex 05, France — 3E.S.P.C.I, 10 rue Vauquelin, 75231 Paris Cedex 05, France — 4LDFC Institut de physique, 3 rue de l’Université, 67084Strasbourg Cedex, France
A general theory for active viscoelastic materials made of polar filaments is presented. This theory is motivated by the dynamics of the cytoskeleton, a network of filamentous proteins that plays a key role, e.g. in cell division and cell locomotion. In this system, the continuous consumption of ATP generates a non equilibrium state characterized by the generation of flows and stresses. An application of the theory to topological point defects that appear during division and in moving keratocytes will be discussed.