MAP20071506654 Kaufman, Jonathan W. Respiratory demand during rigorous physical work in a chemical protective ensemble / Jonathan W. Kaufman and Sherri Hastings Protection afforded by a respirator fliter depends on many factors, among them chemical or biological agent or flow rate. Filtration mechanisms, such as chemical adsorption, depend on sufficient residence time for the filter media to extract noxious agents from the airstream. Consequently, filter efficiency depends on inspiratory air velocities, among other factors En: Journal of occupational and environmental hygiene. - Cincinnati, Ohio : American Industrial Hygiene Association : American Conference of Governmental Industrial Hygienists. - Vol. 2, nº 2, January 2005 ; p. 98-110 1. Higiene industrial . 2. Contaminantes químicos . 3. Riesgo laboral . 4. Vías respiratorias . 5. Ventilación . 6. Contaminantes físicos . 7. Control biológico . 8. Filtros . 9. Trabajo físico . I. Hastings, Sherri . II. American Industrial Hygiene Association . III. American Conference of Governmental Industrial Hygienists . IV. Título.