ABSTRACT
Health state of workers in hazardous conditions of copper melting enterprise depends on wide spectrum of somatic occupationally conditioned diseases. Economic damage from workers' health disorders due only to cardiovascular diseases can be considerable. To reduce this damage, hygienic measures are necessary to improve work conditions, to preserve occupational fitness of the workers, other measures to diminish controllable factors of vascular risk and to prevent occupationally conditioned cardiovascular diseases.
Subject(s)
Cardiovascular Diseases/prevention & control , Copper , Metallurgy/standards , Occupational Diseases/prevention & control , Occupational Health/standards , Adult , Humans , Male , Models, Theoretical , RussiaABSTRACT
The presence of teichoic acids in a number of streptomycetes led to the conclusion that these biopolymers were widely spread in genus Streptomyces. The nature of the teichoic acid present in the mycelium was determined by extracting it with 10% trichloroacetic acid, precipitating it with ethanol and identifying the precipitated polymer by partial acid and alkali hydrolysis to alditol, alditol phosphates and glycosylalditol phosphates. Most strains examined in this survey contained glycerol or ribitol teichoic acids; in some cases neither type was detected. Structurally teichoic acids closely resemble those of other genera of gram-positive bacteria and in many cases represent poly(glycerol phosphate) and poly(ribitol phosphate) chains. The proportion of alditol residues bearing sugar substituents varied widely. Three species of genus Streptoverticillium contained glycerol teichoic acids. It is believed that some of the data presented in this paper might be used with some success in taxonomic studies of streptomycetes.
