Dynamical effects induced by long range activation in a nonequilibrium   reaction-diffusion system
  We both show experimentally and numerically that the time scales separation introduced by long range activation can induce oscillations and excitability in nonequilibrium reaction-diffusion systems that would otherwise only exhibit bistability. Namely, we show that the Chlorite-Tetrathionate reaction, where autocatalytic species diffuses faster than the substrates, the spatial bistability domain in the nonequilibrium phase diagram is extended with oscillatory and excitability domains. A simple model and a more realistic model qualitatively account for the observed behavior. The latter model provides quantitative agreement with the experiments. 
M. Fuentes, M.N. Kuperman, J. Boissonade, E. Dulos, F. Gauffre, P. De   Kepper