A series of m-xylene/NOx experiments were conducted in the new Bourns College of Engineering-Center for Environmental Research and Technology dual 90 m3 indoor smog chamber to elucidate the role of NOx on the secondary organic aerosol (SOA) formation potential of m-xylene. The results presented herein demonstrate a clear dependence of m-xylene SOA formation potential on NOx, particularly at atm...

Introduction: High concentration of inhalable airborne particles can increase the risk of lung disease in exposed people. This study aimed to determine the respirable particulate matter (PM5) concentration in traditional bakeries of Saveh in 2020. Materials and Methods: This cross-sectional descriptive study was conducted among 25 bakeries where the samples were collected by cyclone and teflon...

BACKGROUND Within the construction industry the risk of lung disorders depends on the specific professions probably due to variations in the levels of dust exposure, and with dust levels depending on the work task and job function. We do not know the extent of exposure in the different professions or the variation between the different work tasks. The purpose of this study was therefore to asse...

THOMAS F. TOMB, PAULS. PAROBECK, and ANDREW J. GERO Pittsburgh Health Technology Center, Mine Safety and Health Administration was greater than five percent. Such a formula was developed and is included in Parts 70.101, 71.101, and 90.101 of Title 30, Code of Federal Regulations (CFR). These regulations state that: "When the respirable dust in the mine atmosphere of the active workings contains...

The study was conducted on 27 rubber factory workers for the functional assessment of brainstem auditory pathway. Neurobehavioural questionnaire was administered to the workers and the personal sampler was used to evaluate the respirable particulate load inhaled per day of each worker along with qualitative analysis for PAH compounds. Evoked potential recording was carried out for brainstem aud...

This paper describes a pilot study of chloride, nitrate, and sulphate content in thoracic and high-risk respirable fractions of airborne particles. Samples were collected at one measuring site in Zagreb in autumn 1998 and spring 1999. The results showed that almost total chloride, nitrate, and sulphate content was present in the respirable particle fraction. The average mass contribution of the...

air pollution in industrial and urban areas is one of the most important problems of environment which endangers humans' health; an example of these pollutants is the suspended particles in the air that with the increase of 10 in the air, the rate of mortality increases by 1 to 3 precent. this study was done during three seasons by determining ten sampling stations in each season and according ...