Risk factors for the development of bronchopulmonary pathology in workers producing synthetic polyacrylonitrile fiber

Aim of the study was to assess the risk of bronchopulmonary pathology in workers of the production of synthetic polyacrylonitrile fiber as a result of exposure to harmful chemicals and smoking tobacco products. Material and methods. During the periodic medical examination, the function of external respiration and adherence to smoking in 137 employees were studied, medical records were analyzed (025/u accounting form). Hygienic assessment of working conditions was carried out on the basis of the results of in-situ sanitary and hygienic studies. Results and discussions. As a result of a hygienic assessment of working conditions, it was found that workers engaged in the production of polyacrylonitrile fiber are subject to the combined intermittent effects of harmful chemicals of hazard classes 1–3 (acrylonitrile, methyl acrylate, hydrocyanide, ammonia, sodium rhodanide, sulfuric acid, methanol, isopropyl alcohol, ethylene glycol), the content of which in the working area exceeded the maximum permissible concentrations in 1.6% of samples. The occupational risk of developing bronchopulmonary diseases in groups of workers who smoke is assessed as unacceptably high, while in people exposed to harmful chemicals, its level is 28.46 times higher than in people who are not exposed to these effects. The risk of the formation of ventilation disorders in groups of smoking workers is unacceptably high, while its level is 2.46 times higher in workers exposed to harmful chemicals than in non-workers in such conditions. In groups of workers exposed to harmful chemicals, the occupational risk of obstructive disorders is unacceptably high, in the group of smokers the risk is 2.32 times higher. Conclusions. Among the employees of the enterprise producing synthetic polyacrylonitrile fiber, the influence of tobacco smoking on the development of bronchopulmonary pathology is higher than the influence of harmful working conditions, and the use of smoking tobacco products significantly increases the negative effect of chemical pollutants

The Parasitic Coelenterate, \u3ci\u3ePolypodium hydriforme\u3c/i\u3e Ussov, from the Eggs of the American Acipenseri from \u3ci\u3ePolyodon spathula\u3c/i\u3e

No significant differences in macro- and micromorphology were found between the parasitic stolon and free-living polyps of Polypodium sp. obtained from infected eggs of the North American acipenseriform fish Polyodon spathula and corresponding developmental stages of Polypodium hydriforme Ussov, parasitic in the Volga sterlet (Acipenser ruthenus). Therefore, both the American and the European forms of Polypodium belong to the species P. hydriforme Usso

Synthesis of Iron Aluminates and a New Modification of Alumina at Impact of Explosive

Synthesis of new high-strength superdispersed materials by use of detonation and shock waves is a developing branch of manufacture. Diamond, metal oxides, nitrides, and many other substances are produced and find industrial application. The objective of current work was the method of synthesis of iron aluminates and a new modification of alumina. For the synthesis initiation of explosion of aluminized composite explosive by impact was firstly used

FOLIC ACID ROLE IN MUTAGENESIS, CARCINOGENESIS, PREVENTION AND TREATMENT OF CANCER

ABSTRAC