Oxidative destruction of chlorinated hydrocarbons on Pt-containing fiber-glass catalysts.

Novel catalysts comprising noble metals (Pt), supported on fiber-glass woven materials demonstrated efficient oxidation of different chlorinated hydrocarbons (chlorobenzene, dichloroethane, dichloropropane,butyl chloride) and industrial mixed chlorinated organic wastes into HCl, CO2 and H2O at moderate temperatures without formation of highly toxic by-products (dioxins, phosgene, polychlorinated hydrocarbons,elemental chlorine). The highest oxidation activity and selectivity was observed for the platinum catalysts produced from fiber-glass supports with increased acidity and with additional introduction of promoting elements (such as Co, Mn and Cu). Long-term tests (more than 100 h) have shown no deactivation of the said catalysts. In combination with competitive catalyst price (due to the extra-low content of Pt--below 0.05% mass) it opens the way for development of highly efficient and feasible technology for utilization and detoxication of various chloro-organic wastes.

[Social aspects of the problem of suppurative surgical diseases]. / Sotsialnye aspekty problemy gnoinykh khirurgicheskikh zabolevanii.

The case records of 259 patients with purulent surgical diseases are analysed. The following social groups of patients were distinguished; students--10.4%, office workers--20.5%, factory and agricultural workers--35.9%, lonely pensioners, invalids, and homeless persons--33.2%. The last named group is least socially protected, and the diseases in these cases have a characteristic course and outcomes. In the groups of students and office workers the disease is predominantly marked by the formation of abscesses with rapid resolution after an operative intervention. In the socially unprotected group with somatic diseases, poor nutrition, and absence of care, the purulent process takes a phlegmanous course calling for the use of antibiotics and immunostimulators. The percentage of rehospitalization among these patients is high (up to 20%) due, in many respects, to social factors.