  Enzyme catalysis in reactors for industrial applications usually require an
external intervention of the species involved in the chemical reactions. We
analyze the most elementary open enzyme catalysis with competitive inhibition
where a time-dependent inflow of substrate and inhibitor supplies is modeled by
almost periodic functions. We prove global stability of an almost periodic
solution for the non-autonomous dynamical system arising from the mass-law
action. This predicts a well behaved situation in which the reactor oscillates
with global stability. This is a first case study in the path toward broader
global stability results regarding intraspecific and monotone open reaction
networks.
