[Effect of long-term exposure to carbon disulfide on various biochemical indices in albino rats].

The effect of carbon sulphide was studied on sexually matured male and female albino rats, subjected to 180-day exposure with concentrations 0.03, 50 and 200 mg/m3, 6 hours daily, 5 days a week. Carbon sulphide effect was studied by indices, characterizing the state of the oxidation processes and lipid metabolism.

[Hygienic evaluation of the planning and construction of housing complexes].

Three blocks of flats were the subject of this study. They have been projected and built at different periods and the study covers the following principal aspects: sanitary urbanization analysis, assay of some of the basic environmental physical factors and physiologic reactions of the human organism and atmosphere contamination. These blocks of flats are still unable to provide wholy adequate sanitary conditions, in conformity with the urbanization setup, edifice situating, planning and organization of public services on the territory and anthropogenic factors.

[Hygienic effect of landscaping in urban areas].

The atmospheric environment in two blocks of flats with different degree of gardens and parks lain out and in a town park in Sofia was studied by the basic physical, chemical and physiologic parameters. The results give grounds to admit that laying out gardens and parks in urban zones contributes to the creation of definite, qualitatively and quantitatively different housing environment: a more favourable temperature-and-moisture, radiation - thermal and biologicaly active regime. The physiologic state of residents, looking for recreation in these places, was better in an environment of ample verdure.