Electric Self-sustained Oscillations of a DOPH-Millipore Membrane induced by Acids

Self-sustained spatiotemporal oscillations induced by membrane-bulk coupling.

We propose a novel mechanism leading to spatiotemporal oscillations in extended systems that does not rely on local bulk instabilities. Instead, oscillations arise from the interaction of two subsystems of different spatial dimensionality. Specifically, we show that coupling a passive diffusive bulk of dimension d with an excitable membrane of dimension d-1 produces a self-sustained oscillatory...

Self-Sustained Oscillations of Nonlinearly Viscoelastic Layers

Experimental study of self-sustained oscillations in a confined jet.

A. Maurel, P. Ern, B. J. A. Zielinska, and J. E. Wesfreid Laboratoire de Physique et Mécanique des Milieux Hétérogènes URA CNRS 857, Ecole de Physique et Chimie Industrielles de Paris (ESPCI), 10 rue Vauquelin, 75231 Paris Cedex 05, France Schlumberger Industries/Gas Engineering Montrouge, Boite Postale 620 05-92 542 Montrouge, Cedex, France ~Received 3 January 1995; revised manuscript received...

Self-sustained oscillations in a large magneto-optical trap.

We have observed self-sustained radial oscillations in a large magneto-optical trap, containing up to 10(10) Rb85 atoms. This instability is due to the competition between the confining force of the magneto-optical trap and the repulsive interaction associated with multiple scattering of light inside the cold atomic cloud. A simple analytical model allows us to formulate a criterion for the ins...

Acetylcholine-Induced Membrane Potential Oscillations

RESULTS. Acetylcholine (100 nM to 1 mM) induced a decrease in membrane conductance and a depolarization of membrane potential in the intact lens. The responses were reversed by application of the muscarinic antagonist, atropine (1 /xM to 100 /xM). In the presence of 1 JLLM thapsigargin and 30 JUM cyclopiazonic acid, acetylcholine still induced an electrical response. Long exposures to acetylcho...