نتایج جستجو برای: dust event day
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Extended abstract 1- Introduction Dust occurrences as natural events are common in arid, semi-arid and desert areas. Investigation of the dust with internal sources in the Khuzestan province including about 15 percent of the dust events coming to the region and the presence of the annual average of 50 times of the internal dust (with the concentration maximum of PM10 particles more than 8000p...
Ventilatory capacity was measured before and after exposure to high concentrations of wheat dust in 24 men, i8 of whom were similarly studied while working with calcium phosphate rock. Changes in venti-latory capacity were examined in relation to respiratory symptoms as commonly elicited in occupational surveys, and to the presence or absence of a productive cough on request and under observati...
Humans will again set foot on the moon. The moon is covered by a layer of fine dust, which can pose a respiratory hazard. We investigated the pulmonary toxicity of lunar dust in rats exposed to 0, 2.1, 6.8, 20.8 and 60.6mg/m of respirable-size lunar dust for 4weeks (6 h/day, 5 days/ week); the aerosols in the nose-only exposure chambers were generated from a jet-mill ground preparation of a lun...
Introduction Slope-streaks are a class of features forming on the surface of present-day Mars. They were first discovered in highresolution Viking Orbiter images (1; 2), but only Mars Orbiter Camera (MOC) images (3) revealed that they are currently active. Sullivan et al. (4) developed a kinematic model for dry dust avalanches that is consistent with observed characteristics of slope streaks. S...
Light detection and ranging (LIDAR) can estimate daily volumes of sand dust particles from the East Asian desert to Japan. The objective of this study was to investigate the relationship between sand dust particles and pulmonary function, and respiratory symptoms in adult patients with asthma. One hundred thirty-seven patients were included in the study. From March 2013 to May 2013, the patient...
We present the first Rare Earth Elements (REE) concentration record determined in 294 sections of an Antarctic ice core (EPICA Dome C), covering a period from 2.9 to 33.7 kyr BP. REE allow a detailed quantitative evaluation of aeolian dust composition because of the large number of variables (i.e. 14 elements). REE concentrations match the particulate dust concentration profile over this period...
BACKGROUND Ambient particulate matter (PM) has an adverse effect on respiratory morbidity. Desert dust outbreaks contribute to increased PM levels but the toxicity of desert dust mixed with anthropogenic pollutants needs clarification. METHODS We identified 132 days with desert dust episodes and 177 matched days by day of the week, season, temperature and humidity between 2001 and 2006 in Ath...
[1] Desert dust simulations generated by the National Center for Atmospheric Research’s Community Climate System Model for the current climate are shown to be consistent with present day satellite and deposition data. The response of the dust cycle to last glacial maximum, preindustrial, modern, and doubled-carbon dioxide climates is analyzed. Only natural (non-land use related) dust sources ar...
OBJECTIVES Since Korea is geographically close to China (the origin site for Asian sand dust [ASD]) the health influence of ASD event will be still greater in Korea. We aimed to evaluate the effect of PM10 (particulate matter with aerodynamic diameter <10 μm, below 150 μg/m3) on the clinical course of allergic rhinitis (AR). METHODS We enrolled 47 healthy volunteers (group A) and 108 AR patie...
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