[Biological effect of Botran-75B].

Study results on acute and chronic toxicity allowed us to attribute bortran-75B fungicide to low-toxic compounds with moderately expressed cumulation. Under long-term pesticide exposure changes in activity of a number of blood enzymes were noted. Its threshold and nonactive doses were determined.

[Hygienic aspects of noise prevention in the cities].

The study was undertaken to analyze the sources of external noise, factors influencing the noise regime of the residential area and the characteristics of traffic noise propagation near highway and inside the housing estates. Acoustic discomfort zones were described as illustrated by Troparevo micro-district. Comparative acoustic efficacy of some noise-protective installations was presented, i.

[Methodological aspects of hygienic standardization of pesticide level in food products].

On the basis of a significant amount of experimental studies of toxic effect of pesticides attributed to different groups of chemical substances a rapid calculating and experimental technique for hygienic standardization of pesticide content in foodstuffs has been set forth. The proposed technique enables one to define quickly and safely the threshold and inert pesticide doses and to reduce general duration of toxicologic experiments by 35%.