[Biofeedback computer games].

Biofeedback systems for game training are reviewed. The origins, evolution, main principles, and specific features of biofeedback game training are considered. A line of novel biofeedback game systems is described. These game systems can be classified as game screens included into an integrated treating system or as individual computer games based on biological feedback.

[Distribution and activity of microorganisms in the deep repository for liquid radioactive waste at the Siberian Chemical Combine].

The physicochemical conditions, composition of microbial communities, and the rates of anaerobic processes in the deep sandy horizons used as a repository for liquid radioactive wastes (LRW) at the Siberian Chemical Combine (Seversk, Tomsk oblast), were studied. Formation waters from the observation wells drilled into the production horizons of the radioactive waste disposal site were found to be inhabited by microorganisms of different physiological groups, including aerobic organotrophs, anaerobic fermentative, denitrifying, sulfate-reducing, and methanogenic bacteria. The density of microbial population, as determined by cultural methods, was low and usually did not exceed 10(4) cells/ml. Enrichment cultures of microorganisms producing gases (hydrogen, methane, carbon dioxide, and hydrogen sulfide) and capable of participation in the precipitation of metal sulfides were obtained from the waters of production horizons. The contemporary processes of sulfate reduction and methanogenesis were assayed; the rates of these terminal processes of organic matter destruction were found to be low. The denitrifying bacteria from the underground repository were capable of reducing the nitrates contained in the wastes, provided sources of energy and biogenic elements were available. Biosorption of radionuclides by the biomass of aerobic bacteria isolated from groundwater was demonstrated. The results obtained give us insight into the functional structure of the microbial community inhabiting the waters of repository production horizons. This study indicates that the numbers and activity of microbial cells are low both inside and outside the zone of radioactive waste dispersion, in spite of the long period of waste discharge.

[Serum angiotensin converting enzyme in the diagnosis of sarcoidosis and other lung diseases]. / Angiotenzinprevrashchaiushchii ferment syvorotki krovi v diagnostike sarkoidoza i drugikh zabolevanii legkikh.

The serum angiotensin-converting enzyme activity (ACE) was studied in 198 patients (116 had sarcoidosis and 82 pulmonary diseases with sarcoidosis-like X-ray picture). Rise of ACE activity in sarcoidosis patients was clearly associated with the process phase (93% in active sarcoidosis and 35.7% in nonactive). Rise of serum ACE activity was found in 46.3% of the patients having sarcoidosis-like diseases (in 41% with tuberculosis 56.3% with nonspecific inflammatory diseases and also in patients with fibrosing alveolitis, histiocytosis X and pneumoconiosis). Though the blood serum ACE activity has a high rate of the increase in sarcoidosis, this test should be considered only in the general complex of differential diagnosis signs. This can be explained by a sufficiently high probability of ACE activity rise in all diseases that most commonly require differentiation with sarcoidosis.