منابع مشابه
Effect of welding fume on heart rate variability among workers with respirators in a shipyard
Welding fume exposure is associated with heart rate variability (HRV) reduction. It is still unknown whether respirator can reduce effect of welding fume on HRV among welding workers in a shipyard. We recruited 68 welding workers with respirator and 52 welding workers without respirator to measure HRV indices, including standard deviation of normal-to-normal intervals (SDNN) and square root of ...
متن کاملInhalation risk and particle size in dust and mist.
Respiratory Absorption and Elimination The human respiratory system has long been known to filter the air passing through it. Lord Lister demonstrated that putrefactive organisms were not present in air passing out of the lungs and in 1869 Tyndall (1881) found that air expelled towards the end of a breath failed to produce scattered light near the focus of a light beam and caused the white trac...
متن کاملRespiratory protective equipment. RPE: selection and use.
Solids Liquids Gases/vapours Asbestos dust Sprayed droplets Ammonia Engine exhaust particles Paints Carbon monoxide Lead dust and fume Pesticides Carbon dioxide Silica dust Power coating mix Freon’s Welding fume Liquid jetting Helium Shot blasting dust Sewage water Nitrogen Wood dust Mercury vapour Smoke Mists Solvent vapours Fungal spores Chrome acid Engine exhaust gases Bacteria Cutting fluid...
متن کاملRespiratory protection provided by N95 filtering facepiece respirators against airborne dust and microorganisms in agricultural farms.
A new system was used to determine the workplace protection factors (WPF) for dust and bioaerosols in agricultural environments. The field study was performed with a subject wearing an N95 filtering facepiece respirator while performing animal feeding, grain harvesting and unloading, and routine investigation of facilities. As expected, the geometric means (GM) of the WPFs increased with increa...
متن کاملProtective value of dust respirators in extrinsic allergic alveolitis: clinical assessment using inhalation provocation tests.
Six subjects with budgerigar fancier's lung, pigeon breeder's lung, or mushroom worker's lung underwent identical paired inhalation provocation tests of 20 minutes to five hours duration (mean 2.3 hours) using a natural method of antigen exposure. For one test of each pair, the subjects were protected by the use of industrial dust respirators that incorporate electrostatically charged, resin-im...
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ژورنال
عنوان ژورنال: Infection Control & Hospital Epidemiology
سال: 1992
ISSN: 0899-823X,1559-6834
DOI: 10.1017/s0899823x00088449