Regensburg 2010 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 2: Statistical Physics of Biological Systems I (joint session of BP + DY)
DY 2.10: Vortrag
Montag, 22. März 2010, 12:45–13:00, H45
Statistical aspects of trypanosome’s motility — •Vasily Zaburdaev1,2, Sravanti Uppaluri3, Thomas Pfohl3,4, Markus Engstler5, Holger Stark2, and Rudolf Friedrich6 — 1Harvard University, Cambridge, USA — 2Technical University of Berlin, Berlin, Germany — 3MPI for Dynamics and Self-Organization, Göttingen, Germany — 4University of Basel, Basel, Switzerland — 5University of Würzburg, Würzburg, Germany — 6University of Münster, Münster, Germany
Trypanosome is a parasite causing the sleeping sickness. The way it moves in the blood stream and penetrates various obstacles is the area of active research. Our goal was to investigate a free trypanosomes’ motion in the planar geometry. Our analysis of trypanosomes’ trajectories reveals that there are two correlation times - one is associated with a fast motion of its body and the second one with a slower rotational diffusion of the trypanosome. We propose a system of Langevin equations to model such motion. One of its peculiarities is the presence of multiplicative noise predicting higher level of noise for higher velocity of the trypanosome. Theoretical and numerical results give a comprehensive description of the experimental data such as the mean squared displacement, velocity distribution and auto-correlation function.