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Notice on a methodology for characterizing emissions of ultrafine particles/nan...

Bearing in mind the potential adverse health effects of ultrafine particles, it is of paramount importance to perform effective monitoring of nanosized particles in several microenvironments, which may include ambient air, indoor air, and also occupational environments. In fact, effective and accurate monitoring is the first step to obtaining a set of data that could be used further on to perform subsequent eva...

Congresso internacional de saúde ambiental 2012: livro de resumos

Determination of airborne nanoparticles from welding operations

The aim of this study is to assess the levels of airborne ultrafine particles emitted in welding processes (tungsten inert gas [TIG], metal active gas [MAG] of carbon steel, and friction stir welding [FSW] of aluminum) in terms of deposited area in pulmonary alveolar tract using a nanoparticle surface area monitor (NSAM) analyzer. The obtained results showed the dependence of process parameters on emitted ultra...

The characteristics and regional distribution of older workers in Portugal

Population ageing is a common trend in most developed countries with many important economic, social and political consequences. In Portugal, this trend has been particularly strong. The ageing index was 34% in 1970, it is about 129% in 2011, according to the provisory results of the last Census and most recent demographic projections, is expected to be over 240% in 2030. One of the main issues associated with ...

Trabalho em ambientes refrigerados: estudo de caso com a realização de monitori...

Introdução - Em ambientes laborais de baixa temperatura ocorrem reacções fisiológicas destinadas a ajustar o equilíbrio térmico que podem conduzir a sobrecarga cardiovascular. Contudo, em várias áreas de actividade o frio é um factor essencial para a produção, o que torna a exposição ocupacional uma realidade incontornável. Este estudo teve como objectivo identificar alterações electrocardiográficas em trabalha...