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We propose a new mechanism to increase the reactions ratesin multistableautocatalytic systems. The mechanism is based upon the possibility for theenhancement of the response of the system due to the cooperative behaviorbetween the noise and an external periodic modulation. In order to illustratethis feature we compute the reaction velocities for the particular case of theSel'Kov model, showing that they increase significantly when the periodicmodulation is introduced. This behavior originates from the existence of aminimum in the mean first passage time, one of the signatures of stochasticresonance.Comment: Submitted to J. Chem. Phy

Periodic modulation induced increase of reaction rates in autocatalytic systems