Document 2NwDXYXM3vdE10YRqVJ21kpa

FILE NAME Brakes BRK DATE 1963 July DOC BRK017 DOCUMENT DESCRIPTION Abstract from Journal Article Ter RE July 1963 Hazard J. G. Thornson R. Q. C. Kaschula and P. R. Mac- ov, 77 Jan. 19 1963 smears from lang bases from 7 consecutive consecutive Dutopsies in suby arts of 15 year er asbestos bodies were found in 30 of the males and 20 of the females In most case these bodies were scanty and not associated with pulmonary changes and are considered the result of contamination of the urban atmosphere In % of the males the bodies were numerous and were presumably of occupational origin In 3 of the 132 positive cases there was associated pulmonary fibrosis and disability In only one of these a history of exposure to as- bestos was obtainable An increase in the amount of urban ail contamination seems to be in- ettable in view of the increasing consumption and diversity of uses of asbestos and of its intibility The tendency for asbestos fibers to concentrate in the bases of the lower lobes produces a cumulative effect and an increase in the frequency of basal asbestosis This basal asbestosis does not result in pulmonary disease or disability but appears etiological significance in mesothelioma of pleura or peritoneum , -- J. Am Med Assn References and Reviews oe PHYSICAL ASPECTS OF THE ENVIRONMENT reliminary reliminary reliminary reliminary reliminary reliminary Study . R. Challen of Some Brit J. Health Hazards Ind Med 20 in the Plasma Jet Process 95-99 Apr. 1963 D. E. Hickish and A brief technical description is given of the plasma jet process and reference is made to its likely practical applications in industry An opportunity has been taken during ex- periments with a prototype plasma jet to assess some of the health hazards which might arise from these industrial applications and to indicate the type of precautions which should be ob- served in practice Measurement and analysis of the noise emitted during the operation of a . jet showed that the sound intensities ranged from 79.5 to 90.5 db re 0.0002 dynes cm per octave band between 300 and 10,000 second Three male volunteers exposed to the noise for a period of one hour were subsequently found to have a mean temporary threshold of 19 db at 4,000 second Air sampling and analysis for ozone and nitrogen di- lee ~ in the near vicinity of the jet gave a negative result for the former substance but demon- ted that the latter contaminant was present in concentrations ranging from 0.1 to 9.6 ppm -- Authors abst Against Toxic Substances in Space Travel H. H. Bovee and J. E. Schubert . Assn J. 24 168-171 Mar. 1963 Of the many sources of toxic contaminants in the space cabin atmosphere thermal composition composition products from elastomers plastics and other compounds are the most hazardous study of the decomposition characteristics and toxicity of several of these materials indicates that the smoke and fumes given off contribute significantly to the toxicity predicted on the basis gaseous decomposition products only Removal of normal air contaminants is within the prestate capability but protection against thermal decomposition products caused fire may not be economically feasible except by depressurization and atmosphere replace- -~ Authors abst Tas Environment of the Moon P. A. Campbell . Arch Environmental Health 6 724-729 June 1963 The natural environment of the moon poses formidable problems from the standpoint iHan habitation Its almost complete lack of atmosphere and magnetic shield nakedly ex1232 its surface to the electromagnetic radiations of space High energy particles of various lope pe 2 ;3 ii o 2 4 : i RA atin Sanrmie net i ki kl Ve: dt ee od at yg aygepmne Senta Bs urea Se de sate 6 an ay 7 esimpane nuien ey oe 1 ey 5s