[Related to age and length of service, changes in psycho-physiologic occupationally important traits of technologic processes operators].

Psycho-physiologic occupational fitness of technologic processes operators changes during long-standing work in the occupation. The changes are age-related. Over 50 years of age, attention and mental performance do not satisfy the level required, so occupational fitness should be re-assessed after 50 years of age.

[Content of trace elements in the bottoms of open water reservoirs in the Western part of the Orenburg Region].

The mean concentrations of trace elements were determined in the bottoms of open water reservoirs in the western part of the Orenburg Region. The content of chromium was found to exceed the maximum permissible concentration by about 5 times, that of zinc and nickel complies with the clarke; that of copper was nearly 2 times less than the clarke, that of cobalt and vanadium is nearly 1.5 times less.

[Changes in the indices of lipid metabolism in patients with ischemic heart disease occupied in natural gas fields].

The influence of adaptation to periodic pressure-chamber hypoxia produced on the condition of the lipid spectrum of blood serum before and after adaptation as well as in 3, 6 and 10 months after hypoxic training was studied in 46 patients with ischemic heart disease working at a enterprise specializing in winning and processing the hydrogen-sulfide-containing gas-condensate. The adaptation therapy was found to result in a reliable reduction of the total cholesterol level, of the level of cholesterol of lipoproteins of the low and extra low densities and of triglycerides; it also contributed to the increase of cholesterol of lipoproteins of the high density in blood serum, which, in the end, ensures a reduced atherogenic coefficient. The positive-for-organism changes in the lipid spectrum of blood serum hold on in patients with coronary heart disease for as long as 6 months after the adaptation therapy.