BROMATE-1,4-CYCLOHEXANEDIONE-FERROIN GAS-FREE OSCILLATING REACTION .1. BASIC FEATURES AND CROSSING WAVE PATTERNS IN A REACTION-DIFFUSION SYSTEM WITHOUT GEL

We present a study of the bromate - 1,4-cyclohexanedione-ferroin oscil lating reaction in both well-stirred and reaction-diffusion systems. W e investigate the dependence of the system dynamics on the initial rea gent concentrations, with the initial concentration of ferroin varied from 0 to 5 x 10(-3) M, and show that the system behaves like a typica l BZ oscillator if the concentration of ferroin exceeds 5 x 10(-5) M. We demonstrate spontaneous formation of spiral waves and transverse wa ve fronts in quasi-two-dimensional systems and formation of crossing w ave patterns in thin layers of solution open to air.