Kinetic study of stress‐induced luminescence from different tissues

Abstract

Abstract— Exponential decay of the stress‐induced luminescence from different tissues was resolved into the first order reaction components and appropriate rate constants were determined from the reaction half‐times. Kinetic analysis shows that luminescence decays generally through three parallel pseudo‐first order reactions which can be affected independently. The same order of magnitude (even very close numerical values) of the rate constants of luminescent reactions induced by different chemical and physical stimuli in different organisms suggests that a common mechanism is included in their luminescence. Analysis of the secondary kinetics appearing in the particular cases of the luminescence decay, as well as kinetic analysis of the stress‐induced radical decay measured by electron paramagnetic resonance, show that activated forms of oxygen and peroxy‐radicals have a central role in the luminescence emission.