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Aérosols semi-volatils
De l'identification au prélèvement Des études récentes concernant les aérosols semi-volatils ont révélé des interactions entre les particules et les vapeurs. Encore faut-il être capable d'identifier le caractère semi-volatil d'une substance pour développer une méthode de prélèvement et d'analyse prenant en compte les deux phases, particulaire et vapeur. Cet article a pour but de donner une définition adaptée de ce qu'est un aérosol semi-volatil et d'appliquer...
Métrologie en temps réel de substances chimiques au poste de travail
Intérêts et limites Les gaz, vapeurs et aérosols peuvent aujourd'hui être mesurés en temps réel à un poste de travail. Les techniques utilisées sont nombreuses et, pour certaines, de plus en plus simples à utiliser. Après avoir présenté les enjeux liés à l'utilisation de ces techniques pour la sécurité et la santé au travail, cet article en explique les intérêts et les limites par type de substances chimiques (gaz/vapeur et aérosols). Source: http://www...
Consultation on monitoring of water-miscible metalworking fluid (MWF) mists
The aim of this research was to examine metal working fluid (MWF) exposure limits and guidance set by other countries, summarise studies and investigations that examined water-miscible MWF mist as well as new techniques to monitor mist. Source: http://www.hse.gov.uk/research/rrhtm/rr1044.htm
Aerosol Transmission of Infectious Disease
Objective: The concept of aerosol transmission is developed to resolve limitations in conventional definitions of airborne and droplet transmission. Methods: The method was literature review. Results: An infectious aerosol is a collection of pathogen-laden particles in air. Aerosol particles may deposit onto or be inhaled by a susceptible person. Aerosol transmission is biologically plausible when infectious aerosols are generated by or from an infectious person, the pathogen remains viable in the environment for some period of time, and the target tissues in which the pathogen initiates infection...
Exposure to airborne particles and volatile organic compounds from polyurethane molding, spray painting, lacquering, and gluing in a workshop
Due to the health risk related to occupational air pollution exposure, we assessed concentrations and identified sources of particles and volatile organic compounds (VOCs) in a handcraft workshop producing fishing lures. The work processes in the site included polyurethane molding, spray painting, lacquering, and gluing. We measured total VOC (TVOC) concentrations and particle size distributions at three locations representing the various phases of the manufacturing and assembly process. The mean working-hour TVOC concentrations in three locations studied were 41, 37, and 24 ppm according to photo...
Standardisation of the measurement of capture efficiency of on-gun extraction for welding
The inhalation of welding fume is recognised as being a real threat to workers' health due to the development of occupational illnesses such as welding fume fever and asthma. Local exhaust ventilation (LEV) is an effective method to control worker exposure to welding fume and previous work has indicated the merit of the use of on-gun extraction systems. The aim of the present study was to improve and refine the existing on-gun extraction methodology and has resulted in the development of two alternative methods for measuring the efficiency of on-gun fume extraction systems. There are distinct...
Relationship Between Welding Fume Concentration and Systemic Inflammation After Controlled Exposure of Human Subjects With Welding Fumes From Metal Inert Gas Brazing of Zinc-Coated Materials
Objectives: It has been shown that exposure of subjects to emissions from a metal inert gas (MIG) brazing process of zinc-coated material led to an increase of high-sensitivity C-reactive protein (hsCRP) in the blood. In this study, the no-observed-effect level (NOEL) for such emissions was assessed. Methods: Twelve healthy subjects were exposed for 6 hours to different concentrations of MIG brazing fumes under controlled conditions. High-sensitivity C-reactive protein was measured in the blood. Results: For welding fumes containing 1.20 and 1.50 mg m−3 zinc, high-sensitivity C-reactive protein...
Risk assessment for VCE scenario in an aerosol warehouse
In 2006, Dr Graham Atkinson of HSL was asked by HSE to review the risks from fires in large aerosol stores (Atkinson, 2007). Atkinson reviewed incident statistics and reports and concluded that the greatest risk to people from such fires was from explosions, not from the fire itself. He postulated a vapour cloud explosion (VCE) mechanism, whereby a fire of material elsewhere in the warehouse from the aerosols could give rise to a hot air layer close to the ceiling. Aerosols stored close to the ceiling could then fail and release their flammable contents, but not be immediately ignited by the fire...
Exposition aux bioaérosols dans deux milieux professionnels
Les cabinets de dentistes et les cultures de concombres et tomates L'exposition aux bioaérosols (1) (endotoxines, bactéries et spores de champignons en suspension dans l'air) et les problèmes de santé qui en découlent sont bien connus dans certains milieux professionnels (station d'épuration des eaux usées, élevages d'animaux, traitements des déchets organiques, travailleurs du bois, récolte et manutention des céréales, agriculture…). Cependant, les études avec investigations des concentrations...
Automated system for indicating spray clearance times of MVR spray booths/rooms
This report describes the design and assembly of an automated device that will alert sprayers of isocyanate based paints of the presence of spray mist inside paint spray booths /rooms used in the motor vehicle repair (MVR) and other industries. Source: http://news.hse.gov.uk/2009/10/21/rr742-an-automated-system-for-indicating-spray-clearance-times-of-mvr-spray-booths-and-rooms/?rss=Research

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