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[A geometrical analysis of the shape of the response surface in ecologico-toxicologic experiments].

A new method of working up results of factorial toxicological experiments is put forward and illustrated by a number of examples. It is based on the profound comparison of values of reactions as consequences of toxic influence and aimed at revealing the combinations of toxicant concentrations that break the monotonous character of a surface which graphically depicts the effect of pollutants. The geometrical analysis allows us to have a new vision of numerous results of factorial experiments, gives some complimentary possibilities for quantitative evaluation of impact of pollutants by mean of surface diagrams and for experimental assessment of environmental parameters of natural communities.