title: Oscillations and turbulence induced by an activating agent in an active medium.
abstract: An excitable Belousov-Zhabotinsky reagent becomes oscillatory above a threshold of methanol concentration [Me]. The oscillation period decreases with increasing [Me]. A model describes these observations quantitatively. In a spatiotemporal setup, a [Me] gradient causes waves with spatially varying properties; this leads to wave breaks that end up in turbulence, both in experiments and in simulations with partial differential equations.
authors.affiliation: Max-Planck-Institut für Molekulare Physiologie, Postfach 500247, D-44202 Dortmund, Germany. markus@mpi-dortmund.mpg.de
authors.forename: M
authors.initials: M
authors.lastname: Woltering
authors.forename: M
authors.initials: M
authors.lastname: Markus