نتایج جستجو برای: pollutant levels

تعداد نتایج: 935156  

2013
Errol M. Thomson Djordje Vladisavljevic Susantha Mohottalage Prem Kumarathasan Renaud Vincent

Recent epidemiological studies have demonstrated associations between air pollution and adverse effects that extend beyond respiratory and cardiovascular disease, including low birth weight, appendicitis, stroke, and neurological/neurobehavioural outcomes (e.g., neurodegenerative disease, cognitive decline, depression, and suicide). To gain insight into mechanisms underlying such effects, we ma...

2013
Aliakbar Hedayati Ahmad Savari Alireza Safahieh Abdolali Movahedinia

In this study we detect different levels of blood cells and hematological parameters in five creeks of Mahshahr region in North West of Persian Gulf with different levels of pollutant to characterized hematological response of Yellowfin seabream to environmental pollutant and undesirable materials. Numbers of Blood leukocytes was performed by a hemocytometer Neubauer under the light microscope....

Journal: :Environmental Modelling and Software 2000
Nicolas Moussiopoulos Sophia Papalexiou G. Lammel T. Arvaniti

Nitrous acid (HONO) is of particular importance in atmospheric chemistry; its photolysis significantly enhances photooxidation processes early in the morning or during wintertime, through the rapid production of OH radicals in the presence of long wavelength radiation, and in urban areas with low O3 levels. Previous studies reveal that neither direct HONO emissions from combustion sources nor h...

Journal: :Occupational and environmental medicine 2007
M S O'Neill A Veves J A Sarnat A Zanobetti D R Gold P A Economides E S Horton J Schwartz

BACKGROUND Particulate air pollution has been associated with several adverse cardiovascular health outcomes, and people with diabetes may be especially vulnerable. One potential pathway is inflammation and endothelial dysfunction-processes in which cell adhesion molecules and inflammatory markers play important roles. AIM To examine whether plasma levels of soluble intercellular adhesion mol...

A. Duran , M. Fuat Gulhan , S. Kakoolaki , S. M. Mansouri , Z. Selamoglu Talas ,

 Cypermethrin is a potential toxic pollutant that directly threatens the aquatic ecosystems and environment. Propolis, a natural product collected from plants by honey bees has many functions, such as antimicrobial, antioxidant, and anti-inflammatory. This study attempted to detrmine some biochemical and microbiological parameters of rainbow trout fillets after exposure to propolis an...

2009
B. E. Buxton C. A. Calder P. F. Craigmile Noel Cressie Bruce E. Buxton Catherine A. Calder Peter F. Craigmile Crystal Dong Nancy J. McMillan Michele Morara Thomas J. Santner Ke Wang Gregory Young Jian Zhang

The long-term objective of this research project is to characterize multi-pollutant (arsenic, lead, cadmium, and chromium) human exposures by linking sources to biomarkers using a multi-scale (individual level, county level) hierarchical Bayesian model (HBM) that describes how multi-media pathways contribute to direct routes of exposure. Our approach is to use a statistical model that has expli...

Journal: :Stroke 2003
Shang-Shyue Tsai William B Goggins Hui-Fen Chiu Chun-Yuh Yang

BACKGROUND AND PURPOSE Many studies have reported increases in daily cardiovascular mortality and hospital admissions associated with increases in levels of air pollutants. However, little is known about the relationship between hospital admissions for stroke and air pollution. This study was undertaken to determine whether there is an association between air pollution and hospital admissions f...

2015
Luis Hoyos Pedro Lara Elba Ortiz Rafael López Jesús González

This paper proposes a Markov observation based model, where the transition matrix is formulated using air quality monitoring data for specific pollutant emissions, with the primary objective to analyze the corresponding stationary distributions and evaluate sceneries for the air quality impact of pollution control policies. The model is non predictive and could be applied to every source of pol...

2017
W. A. Jedrychowski Renata Majewska J. D. Spengler David Camann E. L. Roen F. P. Perera

BACKGROUND Previous epidemiologic studies have considered the effects of individual air pollutants on birth outcomes, whereas a multiple-pollutant approach is more relevant to public health policy. OBJECTIVES The present study compared the observed effect sizes of prenatal fine particulate matter (PM2.5) and polycyclic aromatic hydrocarbons (PAH) (a component of PM2.5) exposures on birth outc...

2014
Paulina Farías Urinda Álamo-Hernández Leonardo Mancilla-Sánchez José Luis Texcalac-Sangrador Leticia Carrizales-Yáñez Horacio Riojas-Rodríguez

BACKGROUND Lead is a pervasive pollutant, associated at low levels to many adverse health effects. OBJECTIVE To investigate lead levels, exposure pathways and intervention possibilities in school children from Alpuyeca, in Morelos, Mexico. METHODS Blood lead concentrations (BPb) were measured in 226 children in 2011. Exposure pathways were assessed through a questionnaire, lead measurements...

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