نتایج جستجو برای: pollution concentration

تعداد نتایج: 443080  

Journal: :Geospatial health 2009
Roberta Infascelli Raffaele Pelorosso Lorenzo Boccia

Nitrate concentration in groundwater has frequently been linked to non-point pollution. At the same time the existence of intensive agriculture and extremely intensive livestock activity increases the potential for nitrate pollution in shallow groundwater. Nitrate used in agriculture could cause adverse effects on human and animal health. In order to evaluate the groundwater nitrate pollution, ...

2011
Adel Hamdi Imed Mahfoudhi

One motivation for our study concerns an environmental application that regards the identification of pollution sources in surface water: in a river, for example, the introduction of organic matter which could have as origin city sewages, industrial wastes,... usually drops to too low the level of the dissolved oxygen in the water. Since the lack of dissolved oxygen represents a serious threat ...

Journal: :زیست شناسی جانوری تجربی 0

abstract heavy metals are the most important components of environment pollution. soil contaminated by industrial and mining activities of these elements into the soil-plant-human cycle and accumulate in the human or animal body tissue to reach the levels of toxic for animals and humans. for this purpose, a broad sampling of soil, plant and sheep liver were taken and the amount of pb were teste...

2011
F. Gillet

Testate amoebae (TA) associated with terrestrial mosses are increasingly used in ecological and ecotoxicological studies. The TA community is sensitive to changes in its environment (climate change, metal or gas pollution). In this study, a “bryophyte-TA” microsystem was investigated as an indicator of dry particulate deposition and NO2 atmospheric concentration over an 8-month period in rural,...

Journal: :Environmental Health Perspectives 2000
N Künzli I B Tager

There is need for the assessment of long-term effects of outdoor air pollution. In fact, a considerable part of the large amount of U.S. research money that has been dedicated to investigate effects of ambient particulate pollution should be invested to address long-term effects. Studies that follow the health status of large numbers of subjects across long periods of time (i.e., cohort studies...

Journal: :The European respiratory journal 2013
Esther Eenhuizen Ulrike Gehring Alet H Wijga Henriette A Smit Paul H Fischer Michael Brauer Gerard H Koppelman Marjan Kerkhof Johan C de Jongste Bert Brunekreef Gerard Hoek

Outdoor air pollution has been associated with decrements in lung function and growth of lung function in school-age children. Lung function effects have not been examined in preschoolers, with the exception of one study on minute ventilation in newborns. Our goal was to assess the relationship between long- and short-term exposure to traffic-related air pollution and interrupter resistance in ...

Journal: :Environmental Health Perspectives 2004
Patrick G Goodman Douglas W Dockery Luke Clancy

Air pollution exposure studies in the past decade have focused on acute (days) or long-term (years) effects. We present an analysis of medium-term (weeks to months) exposure effects of particulate pollution and temperature. We assessed the associations of particulate pollution (black smoke) and temperature with age-standardized daily mortality rates over 17 years in Dublin, Ireland, using a pol...

2012
Sebatian Żmudzki Ryszard Laskowski

The objective of the study was to determine whether long-term metal pollution affects communities of epigeal spiders (Aranea), studied at three taxonomic levels: species, genera, and families. Biodiversity was defined by three indices: the Hierarchical Richness Index (HRI), Margalef index (D(M)) and Pielou evenness index (J). In different ways the indices describe taxa richness and the distribu...

Journal: :Human reproduction 2005
Jiri Rubes Sherry G Selevan Donald P Evenson Dagmar Zudova Miluse Vozdova Zdena Zudova Wendie A Robbins Sally D Perreault

BACKGROUND This study examined potential associations between exposure to episodes of air pollution and alterations in semen quality. The air pollution, resulting from combustion of coal for industry and home heating in the Teplice district of the Czech Republic, was much higher during the winter than at other times of year with peaks exceeding US air quality standards. METHODS Young men from...

Journal: :محیط شناسی 0
فرانک سیف الدینی دانشگاه تهران ، دانشیار دانشکدة جغرافیا حسین منصوریان دانشجوی دکترای جغرافیا و برنامه ریزی شهری، دانشکدة جغرافیا، دانشگاه تهران

one of the indicators of sustainable urban growth is the balance of development between different regions of the city, quality of the environment, equality in job opportunities, housing, basic services, social infrastructures, and transportation in urban areas. urban sprawl has some negative consequences. some of the consequences that are frequently mentioned are destroying green spaces, high c...

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