Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 53: Posters - Statistical Physics of Biological Systems

BP 53.6: Poster

Mittwoch, 9. März 2016, 17:00–19:00, Poster C

Maze runner: microbial swimming in hexagonal and squared arrays — •Marco Bahrs, Marius Hintsche, Michael Raatz, Matthias Theves, and Carsten Beta — Institut für Physik und Astronomie, Universität Potsdam, Potsdam, Germany

By randomly changing direction, bacteria effectively explore their surroundings. The natural habitat of many microbial swimmers is dominated by interfaces and narrow interstitial spacings. Thus, the organism's movement strategy cannot be understood without reference to its environment and to the close interactions with it. We examined the steric effects of a homogeneously distributed geometrical pattern on bacterial swimming behavior. Experiments were conducted in a microfabricated array of hexagonal and square obstacles. In these environments we recorded the flux of bacteria through the resulting system of channels. Results were compared to an environment comprised of an array of linear channels. Motility parameters like the effective diffusion coefficient and the mean square displacement serve to compare the different experimental surroundings.