[Comparative study of the diagnostic value of new cholera eltor bacteriophages ctx+, ctx-, and KhDF-3, 4, and 5]. / Sravnitel'noe izuchenoe diagnosticheskoi tsennosti novykh bakteriofagov kholernykh él'tor ctx+, ctx-, i KhDF-3, 4, 5]

The comparative evaluation of the diagnostic value of new cholera eltor bacteriophages ctx+ and ctx-, as well as monophages X[symbol: see text]-3, 4, 5, demonstrated their high activity and specificity. Using of these bacteriophages epidemic potential of 95% Vibrio cholerae eltor strains ctx+ and 84.5% of V. cholerae eltor stains ctx- was determined. Commercial monophages X[symbol: see text]-3, 4, 5 were inferior to bacteriophages ctx+ and ctx- in their diagnostic value: only 55% of strains having gene ctxAB were found to be epidemically dangerous, i.e. 45% of strains capable of causing the disease were not detected. On the basis of the results obtained in this investigation cholera eltor bacteriophages ctx+ and ctx- were recommended for introduction into practical use, while further production of cholera diagnostic monophages X[symbol: see text]-3, 4, 5 was recommended to be stopped.

[Hygienic analysis of the experience in dicyclopentadiene production from petrochemical raw materials]. / Gigienicheskii analiz opyta ékspluatatsii proizvodstva ditsiklopentadiena iz neftekhimicheskogo syr'ia.

The labour conditions at an experimental dicyclopentadiene (DCPD) processing line was characterized by a combined action of occupational hygienic factors, mostly contamination of the working zone air with chemical substances. Both to the degree of its hazardousness and concentration levels in the working zone air, DCPD was predominant agent in the gaseous discharges. The DCPD discharge in the air was due to improper pump packing gland hermetization, manual sample taking, inadequate decontamination of the equipment prior to preventive maintenance, as well as to the desorption by the construction elements surfaces. DCPD contamination of the workers' skin and overalls was also revealed.

[The role of construction materials as secondary sources of the air pollution of manufacturing premises with dicyclopentadiene]. / Rol' stroitel'nykh materialov kak vtorichnykh istochnikov zagriazneniia vozdushnoi sredy proizvodstvennykh pomeshchenii ditsiklopentadienom.

The experimental data proposed deals with the adsorption properties of the construction materials used in the dicyclopentadiene (DCPD) production sites. Evaluation of secondary sources of DCPD air contamination is made. Construction materials with the lowest DCPD adsorption are proposed which seem to be of specific practical value in DCPD production sites planning.