Effects of fluctuation on dissipative structures. III. Analysis of a model sensitive to changes in external constraints

The effects of fluctuation on a chemical system which contains a subchemical system showing critical phenomena under suitable conditions has been investigated. It is shown that the system shows pulselike oscillations of opposite directions according to the external conditions. The conditions of the transition state where the chemical system reverses the direction of pulse are very severe and, therefore, this chemical system is extremely sensitive to changes in external constraints. Moreover, under the suitable conditions this chemical system shows three different behaviors depending on initial states and very complicated oscillations appear under influence of fluctuations.