[CHEMICAL AIR POLLUTION OF THE OCCUPATIONAL ENVIRONMENT AS A FACTOR FOR PROFESSIONAL RISK FOR WORKERS OF MAIN OCCUPATIONS IN THE COPPER AND NICKEL METALLURGY].

There are presented the results of hygienic researches of the harmful substances content in the air of the working area ofthe copper and nickel metallurgy. Sulfur-containing gases (primarily sulfur dioxide), to the effects of which there are exposed workers of drying, smelting, converter conversion, are shown to play a leading role among professional factors.

[Evaluation of carcinogenic risk assessment of metallurgic copper production based on mortality studies and predictive risk values].

Comparative evaluation covered carcinogenic jeopardy at metallurgic copper production through studies of the workers' mortality with malignancies and calculation of individual carcinogenic risks. Findings are that the individual carcinogenic risks calucations correspond to the data obtained in epidemiologic study of the mortality with malignancies and could be used for evaluation of carcinogenic jeopardy.

[Immune state and its correction in metallurgists of copper and nickel production].

The article deals with results obtained in studies of immune system functional state among workers engaged into copper and nickel metallurgy, with data on influence of food rich in vitamins A, E and beta-carotene on workers' immune reactivity.

[Beta-carotene prevention of immune disorders in workers engaged in the fire copper refining].

The paper deals with the studies of the human status and immunological responsiveness of workers engaged in copper-smelting industry. The examinees were found to more frequently develop lower environmentally induced immunological responsiveness followed by leuko- and lymphopenia, higher lymphocytic CD4+/CD8+ ratios, phagocytic dysfunction in peripheral blood. Preventive use of beta-carotene prevented negative changes in immunological parameters.