نتایج جستجو برای: air pollutants

تعداد نتایج: 223139  

Background & Aim: Increasing of air pollution in cities seriously threatens the health of its inhabitants.  PM2.5, PM10 and volatile organic compounds are amongst the air pollutants that their existence in the air in excess concentrations, leads to respiratory and cardiovascular problems, cancer and mortality. Therefore, the concentration of these pollutants in the air of Gorgan city was measur...

Journal: :Environmental research 2015
Hongliang Zhang Yungang Wang Jianlin Hu Qi Ying Xiao-Ming Hu

Meteorological conditions play a crucial role in ambient air pollution by affecting both directly and indirectly the emissions, transport, formation, and deposition of air pollutants. In this study, the relationships between meteorological parameters and ambient air pollutants concentrations in three megacities in China, Beijing, Shanghai, and Guangzhou were investigated. A systematic analysis ...

Journal: :Environmental science and pollution research international 2001
M Allsopp P Costner P Johnston

After pollutants from an incineration facility disperse into the air, some people close to the facility may be exposed directly through inhalation or indirectly through consumption of food or water contaminated by deposition of the pollutants from air to soil, vegetation, and water. For metals and other pollutants that are very persistent in the environment, the potential effects may extend wel...

2014
Francine Heloisa Nicolussi Ana Paula Milla dos Santos Sílvia Carla da Silva André Tatiane Bonametti Veiga Angela Maria Magosso Takayanagui

Study on the prevalence of allergic respiratory diseases in schoolchildren between six and seven years old, associated with indicators of air pollution. A questionnaire based on the International Study of Asthma and Allergies in Childhood was administered to parents of students from public schools, located in urban areas with differing vehicle flows. There was a positive correlation between mon...

ثالثی, محمود, شاهسونی, عباس, محسنی بندپی, انوشیروان, هادئی, مصطفی, یعقوبی, مهدیه,

Background and purpose: Airports are proved to have adverse effects on the air quality of neighboring areas. This study aimed at determining the concentrations of air pollutants including PM10, PM2.5, O3, NO2, SO2, CO, benzene, toluene, ethylbenzene, and xylene (BTEX) in Mehrabad International Airport. Materials and methods: The samples were taken from two sites (runway and passengers waiting ...

Journal: :Cadernos de saude publica 2014
Mateus Habermann Míriam Souza Rogério Prado Nelson Gouveia

Air pollution is a leading public health concern. In addition, poor populations have been reported as showing increased exposure to such pollution. The current study thus aimed to evaluate the socioeconomic status of the population exposed to vehicle-related air pollution in the city of São Paulo, Brazil. The study used data from the 2010 Census on head-of-household's mean monthly income and th...

2011
Demin Wang Yan Huang Weitao Li

This paper presents a new method for realistic real-time rendering of air pollutants based on image processing. The air pollutants’ variable density can create many shapes of mist what can add a realistic environment to virtual scene. In order to achieve a realistic effect, we further enhance thus obtained air pollution data getting from monitor in spatial domain. In the proposed method we map ...

2012
David Olsson Magnus Ekström Bertil Forsberg

There is growing evidence of adverse birth outcomes due to exposure to air pollution during gestation. However, recent negative studies are also reported. The aim of this study was to assess the effect of ozone and vehicle exhaust exposure (NO(2)) on the length of the gestational period and risk of preterm delivery. We used data from the Swedish Medical Birth Registry on all vaginally delivered...

2009
Chit Ming Wong Lin Yang Thuan Quoc Thach Patsy Yuen Kwan Chau King Pan Chan G. Neil Thomas Tai Hing Lam Tze Wai Wong Anthony J. Hedley J.S. Malik Peiris

BACKGROUND Both influenza viruses and air pollutants have been well documented as major hazards to human health, but few epidemiologic studies have assessed effect modification of influenza on health effects of ambient air pollutants. OBJECTIVES We aimed to assess modifying effects of influenza on health effects of ambient air pollutants. METHODS We applied Poisson regression to daily numbe...

2006
Steven Roberts Michael A. Martin

BACKGROUND Many investigations of the adverse health effects of multiple air pollutants analyze the time series involved by simultaneously entering the multiple pollutants into a Poisson log-linear model. This method can yield unstable parameter estimates when the pollutants involved suffer high intercorrelation; therefore, traditional approaches to dealing with multicollinearity, such as princ...

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