Calculations were also conducted for some ORNs with structures that differ from that in Figure , such as ORNs with smatter sizes than that in Figure because of decreases in the numbers of rows and columns and ORNs in which some of kf and kb for the reactions in the ORN in Figure are made negligibly small, say, 1.0×10 -50 M -1 s -1 , and I confirmed that essentially the same results as those in Figures and were obtained. In addition, I investigated the behavior of an ORN in which all reactions are catalyzed by chemical substances within it. The catalytic action was introduced by expressing the rate constants kf and kb for catalyzed reactions in the form kf = kf′Ck and kb = kb′Ck, where Ck is the concentration of Rk acting as a catalyst and kf′ and kb′ are constant. Again, essentially the same results as those in Figures and were obtained when kf′Ck and kb′Ck were chosen to be approximately 10 4 or 10 8 times greater than kf and kb for noncatalyzed reactions.