Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
J Phys Chem A. 2013 Oct 17;117(41):10615-8. doi: 10.1021/jp408080y. Epub 2013 Oct 3.
The propagation of a chemical wave on an inhibitory field, which was wedged between two excitable fields, was investigated for the photosensitive Belousov-Zhabotinsky (BZ) reaction. With an increase in the width of the inhibitory field between the excitable fields (W), the chemical wave divided into two waves at W = Wα. The divided chemical waves then coalesced at W = Wβ with a decrease in W. Wα was larger than Wβ, i.e., hysteresis on the width of the inhibitory field was observed between the division and coalescence of the chemical wave. The experimental results were qualitatively reproduced by a numerical calculation based on a three-variable Oregonator model modified for the photosensitive BZ reaction. These results suggest that the chemical wave may be preserved on the inhibitory field due to an activator supplied from a chemical wave on the excitable field.
在两个兴奋场之间的抑制场中，研究了光敏 Belousov-Zhabotinsky (BZ) 反应的化学波传播。随着兴奋场之间抑制场的宽度 (W) 的增加，化学波在 W = Wα 处分为两个波。然后，当 W 减小时，这两个分开的化学波在 W = Wβ 处合并。Wα 大于 Wβ，即观察到在化学波的分裂和合并之间存在抑制场宽度的滞后现象。实验结果通过基于光敏 BZ 反应修正的三变量 Oregonator 模型的数值计算得到定性再现。这些结果表明，由于来自兴奋场中化学波的激活剂的供应，化学波可能在抑制场中得以保留。
