ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

Respiratory histories and preshift and postshift spirometry were recorded for 90 cotton felt workers and 54 brick workers. Environmental monitoring included area sampling by vertical elutriator and cyclone and personal sampling for respirable dust by cyclone. The prevalence of mill fever and byssinosis was 31% and 5%, respectively, in the cotton workers. Significant dose-response effects were detected for both elutriator and cyclone dust measurements and change in forced expiratory volume at 1 s over the shift. A dose-response relationship was also found for the brick workers.

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

The unusual epidemiology of beryllium disease observed in the early studies of beryllium disease led in 1951 to the hypothesis that the chronic form of the disease is the result of an acquired sensitization to beryllium or its compounds. After 30 years, the role of sensitization has been confirmed in a number of laboratory and clinical studies. The unusual epidemiological features first summarized by Sterner and Eisenbud continue to be evident. The early studies also led to formulation of standards that have resulted in effective control of both the acute and chronic pulmonary forms of beryllium disease. No case of acute chemical pneumonitis has been reported among beryllium workers in about 15 years, and the number of chronic cases has diminished greatly despite a marked increase in the use of beryllium.

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

It has long been recognized that optical radiation may be harmful to the eye; however, the precise exposure conditions, wavelengths and irradiation levels required to injure the cornea, lens and retina have not always been well understood. Ultraviolet (UV) radiation levels that elicit UV photokeratoconjunctivitis are dramatically dependent on wavelength. The damage is the result of a photochemical effect. Lenticular opacities produced in laboratory animals appear to be produced only within a narrow waveband near 300 nm by UV radiation or by extremely high-exposure doses of infrared radiation. Wavelengths between 400 and 1,400 nm may reach the retina in the normal eye, and at sufficient irradiance levels can cause a retinal “burn.” Short-wavelength light (blue-violet) can cause a retinal photochemical burn, whereas longer wavelengths and short pulses of light appear to be capable of injuring the retina by a thermal damage mechanism. It has only recently been appreciated that the geometry of the light source and the direction of exposure (e.g., overhead v direct) play important roles in determining the likelihood of ocular injury.

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

An outbreak of hypersensitivity pneumonitis in a textile plant was attributed on epidemiological grounds to a chilled water air-conditioning system where a slime was growing in the chilled water sump and on demister vanes. All of the patients and about 80% of their asymptomatic co-workers had strongly positive precipitin tests to extracts of the slime. An adoptation of a radioiodinated staphylococcal protein A solid-phase radioimmunoassay was applied to monitor antigen and specific antibody. To control the outbreak, a variety of cleaning and water treatment measures were taken between 1977 and 1979 to reduce the amount of antigen in the water and in the air. The amount of slime in the water was greatly reduced though the antigen content per gram of slime did not change. Airborne antigen in the affected work areas decreased progressively.

ISSN:0096-1736    

出版商:OVID    

年代:1983

数据来源: OVID