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E-mail: chemhds@inje.ac.krReceived September 2, 2008This study delves on the chemical wave propagation obtained by a modified Belousov-Zhabotinsky (BZ)reaction in a two-dimensional system under the AOT-emulsion media conditions. The media consist of water,oil (octane), sodium bis-sulphosuccinate as an anionic surfactant, and the reactants containing ferroin and 1,4-cyclohexanedione (1,4-CHD). Results on the concentration dependence of the overall dynamics and wavespeeds are presented. The behaviors obtained in this system are analyzed by a suitable mechanism specificallyfor their reaction systems. These behaviors are then compared with the wave patterns observed under similarsystems adopting resin or gel membrane system.Key Words : AOT-emulsion, BZ reaction, Excitation, Pattern formationIntroductionChemical waves are striking phenomena that occur insome reacting systems evolving far from equilibrium. Ex-amples of these are pulse waves propagating in the so-calledexcitable media.

Excitation of Waves in a Belousov-Zhabotinsky System in Emulsion Media