Luengviriya Chaiya, Storb Ulrich, Hauser Marcus J B, Müller Stefan C
Institute of Experimental Physics, Biophysics Group, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany.
Phys Chem Chem Phys. 2006 Mar 28;8(12):1425-9. doi: 10.1039/b517918a. Epub 2006 Feb 13.
A method to prepare a uniform thin layer of a batch Belousov-Zhabotinsky (BZ) reaction under oxygen-free conditions for the study of an isolated spiral wave is presented. After a first layer of gel soaked with the BZ solution has been delivered into the reactor, a single spiral wave was initiated, and finally the remaining reactor volume was filled with gel and BZ medium. The completely filled reactor is sealed gas-tightly, yielding oxygen-free, and thus more controlled, reaction conditions. A systematic study of the behaviour of an isolated spiral wave in a ferroin-catalyzed BZ reaction under batch conditions has been performed. Recipes for BZ media that support a slowly rotating meandering spiral were developed. In cases of extremely low excitability (i.e., relative large stimuli are required to induce a propagating wave), the number of petals in the trajectory of a spiral tip decreased due to aging of the reaction system. Since oxygen-free conditions are necessary for the study of the dynamics in three-dimensional excitable media, and the wave velocities of a spiral are sufficiently low, the developed chemical recipes are suitable for studies of the behaviour of scroll waves in three-dimensional systems by optical tomography.
提出了一种在无氧条件下制备批量贝洛索夫-扎博京斯基（BZ）反应均匀薄层的方法，用于研究孤立螺旋波。在将浸有BZ溶液的第一层凝胶送入反应器后，引发单个螺旋波，最后用凝胶和BZ介质填充反应器的剩余体积。完全填充的反应器气密密封，产生无氧且因此更可控的反应条件。对批量条件下亚铁菲罗啉催化的BZ反应中孤立螺旋波的行为进行了系统研究。开发了支持缓慢旋转蜿蜒螺旋的BZ介质配方。在兴奋性极低的情况下（即需要相对较大的刺激才能诱导传播波），由于反应系统老化，螺旋尖端轨迹中的花瓣数量减少。由于无氧条件对于研究三维可激发介质中的动力学是必要的，并且螺旋的波速足够低，因此所开发的化学配方适用于通过光学断层扫描研究三维系统中涡旋波的行为。
