Ultrafine particles in urban air and respiratory health among adult asthmatics

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Ultrafine particles in urban air and respiratory health among adult asthmatics.

Airborne particles are associated with adverse health effects and contribute to excess mortality in epidemiological studies. A recent hypothesis proposes that the high numbers of ultrafine (<0.1 microm diameter) particles in ambient air might provoke alveolar inflammation and subsequently cause exacerbations in pre-existing cardiopulmonary diseases. To test the hypothesis adult asthmatics were ...

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Ultrafine particles in the urban air: to the respiratory tract--and beyond?

fine particle hypothesis stating that ambient ultrafine particles (UFP; < 0.1 μm in aerodynamic diameter) may cause adverse health effects at the first Colloquium for Particulate Air Pollution and Human Mortality and Morbidity in Irvine, California, it was met with friendly skepticism as well as out-right dismissal. Arguments were that UFP are very short-lived and disappear through heterogeneou...

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Footprints of Airborne Ultrafine Particles on Urban Air Quality and Public Health

Emergence of airborne ultraane particles (UFPs; those below 100 nm in diameter) in both indoor and outdoor urban settings is continuously attracting attention of the air quality science and management communities worldwide due to their probable adverse impacts on human health and the environment. A simple mean to visualise their tiny size is that the width of a single human hair can accommodate...

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Exposure and Toxicity Assessment of Ultrafine Particles from Nearby Traffic in Urban Air in Seoul, Korea

OBJECTIVES We investigated the particle mass size distribution and chemical properties of air pollution particulate matter (PM) in the urban area and its capacity to induce cytotoxicity in human bronchial epithelial (BEAS-2B) cells. METHODS To characterize the mass size distributions and chemical concentrations associated with urban PM, PM samples were collected by a 10-stage Micro-Orifice Un...

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It has been suggested that ultrafine particles in urban air may cause the health effects associated with thoracic particles (PM10). We therefore compared the effects of daily variations in particles of different sizes on peak expiratory flow (PEF) during a 57-day follow-up of 39 asthmatic children aged 7-12 years. The main source of particulate air pollution in the area was traffic. In addition...

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ژورنال

عنوان ژورنال: European Respiratory Journal

سال: 2001

ISSN: 0000-0000,0903-1936

DOI: 10.1183/09031936.01.17304280