Abstract
By studying a group of organophosphorus compounds (PhOC), system of methods for developing models of chronic intoxication was approved, the purpose of which was to establish safe levels of chemical pollutants in the water. The magnitudes of threshold doses (TD) and ineffective doses (MID) were obtained by using MACrv (maximum admissible concentrations of substances in the air of industrial plants) and TLV [indices of admissible levels of substances in the air of industrial plants (USA standards)]. In compiling estimated and experimentally established MAC for 21 substances, variations were recorded within the range of 2-10 times. Forecasting on the basis of ED50, Elim and other measures during 5-20 day experiments made it possible to estimate threshold and inactive doses of PhOC during chronic intoxication, as well as to determine a cumulative coefficient and distribute these compounds into two series, according to the degree of their hazard. This project made it possible to determine cumulative properties simultaneously and forecast the chronic toxicity of the PhOC group under investigation.
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