聚乙二醇对振荡反应的影响

前文［1］曾指出，生物体系的化学振荡反应实际上是产生于水溶胶之中（包括高分子溶液及表面活性剂溶液）．作为反应介质，水溶胶对生物体系的周期现象有着不可忽略的重要作用．因此，要模拟生物体系的化学振荡就不能不考虑溶胶对振荡反应的影响．前文［2，3］报道了表面活性剂TritonX－100（简称TX－100），TritonX－305等对振荡反应的影响．为了解聚乙二醇类表面活性剂中EO链的作用及高分子溶液对振荡反应的特征影响，我们选用高分子聚乙二醇（PEG）作为添加剂，考虑由于它的加入而引起振荡反应的变化．为了减少PEG中自由羟基的还原…

The Effects of Polyethylene Glycol on Oscillating Reactions

It was found from experiments that the addition of polythylene glycol (PEG) can make the B-Z and B-R reactions producing double induction periods, i.e. before the general induction period there is an earlier stage of induction in which there is no any change of color and state. The lifetime of the earlier stage is not noly effected by the concentration of PEG, but also by the time of the last reagent added. It was also found that there are two linear relationships between the concentration of PEG and the reduced viscodity of PEG solution or/and the lifetime of the earlier stage of induction. Another characteristic of PEG effect is that it can decrease the period change during the oscillat ing reactions. These experimental results are not only useful in the research pf chemical oscillation, but also give a simple method for determining colligative properties of macro molecule sultion.