BACKGROUND PAPRICA is a research program designed to estimate the impact on the health of patients with chronic respiratory insufficiency of a prevention strategy based on notification of ozone pollution. The first year of this study was conducted during the 2003 heat wave, and high temperatures were therefore considered as a confounding factor in the data analysis. The aim of the present study...

The relationship between month and daily mean concentrations of ozone and NOx were established. Month values of ozone dose (AOT40 values) for the vegetation period as well as the short-term ozone episodes and some climatic factors (air temperature and humidity, global radiation) and NOx concentrations is established with direct reference to ICP-forest data. The monitoring of air pollution is ca...

Air pollution is a challenging issue in some of the large cities in developing countries. Air quality monitoring and interpretation of data are two important factors for air quality management in urban areas. Several methods exist to analyze air quality. Among them, we applied the dynamic neural network (TDNN) and Radial Basis Function (RBF) methods to predict the concentrations of ground-level...

Biogenic sources contribute a large portion of emissions of volatile organic compounds (VOCs), a precursor to tropospheric ozone (O3). These emissions are difficult to control and are affected by land-use and climate. A sensitivity analysis was performed using an emissions scenario with a 100% increase in biogenic emissions and another scenario with an additional 100% increase in motor vehicle ...

Introduction In Europe, the development of air pollution abatement strategies is founded on the ef­ fects-based approach, which includes the ozone-induced plant injury as one of the key effects to be minimized. Within this frame­ work, the risk of ozone damage to vegetation is related to numerical exposure and dose in­ dices (UNECE 2004b, Simpson et al. 2007, Tuovinen et al. 2007). Both types o...

OBJECTIVES To explore the hypothesis that hydrocarbon species and other air pollutants which accumulate at low and high concentrations of ozone are more directly associated with childhood wheezy episodes than ozone. METHODS Prospective observational study over 1 year set in the Lewisham district of south east London. The daily attendance rate of children with acute wheeze at the accident and ...

Air quality assessment of the emission from power plant and traffic at Al-Taneem area located at the northern part of the Holy City of Makkah, Saudi Arabia, is investigated. Concentration levels of different pollutants including nitrogen dioxide (NO(2)), sulfur dioxide (SO(2)), carbon monoxide (CO), ozone (O(3)), methane (CH(4)) and total hydrocarbons (THC) as well as some meteorological parame...

Acute pulmonary epithelial injury produced by short-term exposure to ozone varies by site within the tracheobronchial tree. To test whether this variability is related to the local dose of ozone at the tissue site or to local concentrations of glutathione, we exposed adult male rhesus monkeys for 2 h to filtered air or to 0.4 or 1.0 ppm ozone generated from 18O2. Following exposure, lungs were ...

In the Persian Gulf region, conditions are highly favorable for ozone air pollution and the region is a hot spot of photochemical smog. The vast activities in processing oil and gas play a major role in it. It was found that the elevated concentrations of reactive hydrocarbons co-emitted with nitrogen oxides from Hydrocarbon Processing facilities lead to substantial ozone production. South Pars...

12 Ozone-initiated chemistry in indoor air can produce sub-micron particles, which are potentially harmful 13 for human health. Occupants in indoor spaces constitute potential sites for particle generation through 14 ozone reactions with human skin and clothing. This investigation conducted chamber experiments to 15 examine particle generation from ozone reactions with clothing (a T-shirt) unde...