and what ORN reaches a steady state without demonstrating such behavior. Interestingly, the results in Figures and indicate that ORNs with a simple structure such as that shown in Figure reach a steady state without displaying oscillatory or dispersive behavior. The results also indicate that the concentrations Ci of chemical substances Ri in a steady state are kept constant, demonstrating that a steady state is attained through a full balance between all the involved reaction and diffusion processes under constant inflows and outflows of chemical substances.