نتایج جستجو برای: gaseous pollutants

تعداد نتایج: 38626  

Journal: :Sozial- und Praventivmedizin 1976
E Grandjean

Air pollution is composed of a particulate phase and a gaseous phase. The particulate phase, consisting of dust and aerosols, is the vehicle of toxic pollutants, transporting them into the respiratory tract. The irritants (sulphur dioxide, nitrogen oxides, aldehydes, and hydrocarbons) are the most important pollutants as regards health; the mucous membranes of the eyes and the respiratory tract...

Journal: :Occupational and environmental medicine 2002
T W Wong W S Tam T S Yu A H S Wong

OBJECTIVE To investigate the association between ambient concentrations of air pollutants and respiratory and cardiovascular mortalities in Hong Kong. METHODS Retrospective ecological study. A Poisson regression of concentrations of daily air pollutants on daily mortalities for respiratory and cardiovascular diseases in Hong Kong from 1995 to the end of 1998 was performed using the air pollut...

2015
Said Munir Essam A. Morsy

In this paper air quality conditions in Makkah and Leeds are compared. These two cities have totally different climatic conditions. Makkah climate is characterised as hot and dry (arid) whereas that of Leeds is characterised as cold and wet (temperate). This study uses air quality data from 2012 collected in Makkah, Saudi Arabia and Leeds, UK. The concentrations of all pollutants, except NO are...

2009
Lindsay JL Forbes Minal D Patel Alicja R Rudnicka Derek G Cook Tony Bush John R Stedman Peter H Whincup David P Strachan HR Anderson

BACKGROUND Higher exposure to outdoor air pollution is associated with increased cardiopulmonary deaths, but there is limited evidence about the association between outdoor air pollution and diagnosed cardiovascular disease. Our study aimed to estimate the size of the association between long term exposure to outdoor air pollution and prevalent cardiovascular disease. METHODS We carried out a...

2008
N. Pérez M. Viana

Partitioning of major and trace components in PM10–PM2.5–PM1 at an urban site in Barcelona (Spain) in the Western Mediterranean was studied in the period 2005–2006. Particular attention was paid to the partitioning of mineral matter and to the evidence of possible interactions of mineral matter with other pollutants (gaseous pollutants and secondary PM). The results showed a high contribution o...

2010
Terje Grøntoft

of gaseous pollutants on paintings installed in microclimate frames (mc-frames), and some examples of modelling results, is presented. The model can be used to study how basic design properties of microclimate frames, such as their air exchange rate, their volume and/or the inclusion of absorbers can affect the pollution fluxes to paintings inside the frames. The modelling indicated that a magn...

Journal: :Environmental Health Perspectives 1978
William A. Feder

Plant species act as natural bioindicators of atmospheric pollutants. Plants can be used as bioassay systems for monitoring atmospheric pollutants. Plant injury symptoms, altered growth and reproductive pattern, changes in yield and/or productivity, and changes in species distribution can be used singly or in combination as monitoring devices. The results must be accepted as semiquantitative, b...

Journal: :Environmental Health Perspectives 1995
G D Leikauf S Kline R E Albert C S Baxter D I Bernstein C R Buncher

The prevalence of asthma, measured either as the frequency of hospital admissions or number of deaths attributed to asthma, has increased over the last 15 to 20 years. Rapid increases in disease prevalence are more likely to be attributable to environmental than genetic factors. Inferring from past associations between air pollution and asthma, it is feasible that changes in the ambient environ...

Journal: :Journal of Crohn's & colitis 2011
Leigh A Beamish Alvaro R Osornio-Vargas Eytan Wine

The health impacts of air pollution have received much attention and have recently been subject to extensive study. Exposure to air pollutants such as particulate matter (PM) has been linked to lung and cardiovascular disease and increases in both hospital admissions and mortality. However, little attention has been given to the effects of air pollution on the intestine. The recent discovery of...

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