It appears possible that there is subclinical airway inflammation or preexisting airway remodeling that is "unmasked" by exposure to higher air pollutant levels, resulting in greater pollution-related effects on lung function among children on CSs.
In earlier work, we observed lower percentages of T-lymphocyte and higher NK cell percentages among residents of a polluted community, and among deliveries in winter, when air pollutant levels are highest (Hertz-Picciotto et al. 2002).
We chose the WHO guideline for PM2.5 because the WHO standard is used for both indoor and outdoor air pollutant levels, as opposed to the daily National Ambient Air Quality Standard of 35 μg/m used for ambient air pollution alone (U.S. Environmental Protection Agency 2014).
Comparing groups of asthmatic and non- asthmatic children exposed to different air pollutant levels, they found that the children who lived in a more polluted place often showed hypermethylation of the transcriptional factor Foxp3, which impairs T reg cells and increases asthma morbidity.
During the 2008 Beijing Olympics, aggressive air pollution control measures were implemented to temporarily improve Beijing's air quality, leading to substantial reductions in air pollutant levels.
While the Upper West Side, for example, showed slightly lower air pollutant levels, Dr. Matte noted that it still had a high concentration of big buildings and cars.
The government's pledge to step up enforcement and expand cloud-seeding operations, as air pollutant levels improved owing to the rain yesterday, raises hope among millions affected by the haze.
Tobacco smoke-related air pollutant levels were studied in ten Finnish restaurants.
It is an important and popular topic in environmental science, as concerns have been raised about the health impacts caused by unacceptable ambient air pollutant levels.
The work presented in this paper aims to examine the feasibility of applying SVM to predict air pollutant levels in advancing time series based on the monitored air pollutant database in Hong Kong downtown area.
Many EJ studies have focused on disparities in exposure to ambient air pollutant levels.
