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  1. Reaction of the organism to stress: The survival attractor concept.Jacques Viret - 1994 - Acta Biotheoretica 42 (2-3):99-109.
    This paper outlines a phenomenological approach for describing physiological reactions occurring immediately after vital threats. This exemplified by data taken from previous studies relative to chemical intoxications of rats by a neurotoxical drug. The survival rate of the animals and the variations of their cerebral acetylcholinesterese activity are both reported as a function of the drug concentration, and with respect to their age. The collecting of the results may be described as the cusp, a bifurcation set of Thom's Catastrophe Theory.The (...)
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  • Hydrodynamic modelling of stress.J. Viret, L. Grimaud & J. Jimenez - 1999 - Acta Biotheoretica 47 (3-4):173-190.
    This work is a qualitative study of an organism''s physiological adaptative response to stress. The experimental data were selected from a previous study leading to the conclusion that stress may be considered as a topological retraction within a vital space that must be more precisely defined. The experimental methodology uses rat poisoning by neurotoxins. The control parameter is the intensity of the toxic doses. Measured parameters are the animals'' survival rate and the kinetics of cerebral acetylcholinesterase activity. The results, when (...)
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  • Apparent time in biology.J. Viret - 1995 - Acta Biotheoretica 43 (1-2):185-193.
    In tracing the survival reaction of an organism, following a vital stress, we have proceeded from the breakdown of a cerebral enzyme as a function of the constraint, to its initial and spontaneous recovery. We have so observed a partial enzymatic recovery, the velocity of which being variable with respect to the constraint intensity. This velocity is expressed asdq/dt, that is, the quantity of enzymedq recovered per unit of timedt. In this paper, the basic idea is to consider the inverse (...)
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  • Modèles mathématiques de la morphogenèse.René Thom - 1982 - Revue Philosophique de la France Et de l'Etranger 172 (3):556-564.
     
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