Results 21 to 30 of about 820,093 (273)

Epigenetics and environmental exposures [PDF]

Journal of Epidemiology and Community Health, 2011
It is becoming increasingly apparent that genetic factors are inadequate to fully explain many processes that shape development and disease. For example, monozygotic twin pairs, despite sharing identical DNA sequences, are often discordant for many traits and diseases, indicating that the same genotype can give rise to distinct phenotypes.
openaire   +2 more sources

A framework for expanding aqueous chemistry in the Community Multiscale Air Quality (CMAQ) model version 5.1 [PDF]

Geoscientific Model Development, 2017
This paper describes the development and implementation of an extendable aqueous-phase chemistry option (AQCHEM − KMT(I)) for the Community Multiscale Air Quality (CMAQ) modeling system, version 5.1.
K. M. Fahey, A. G. Carlton, H. O. T. Pye, J. Baek, W. T. Hutzell, C. O. Stanier, K. R. Baker, K. W. Appel, M. Jaoui, J. H. Offenberg   +9 more
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Environmental Exposures and Hepatocellular Carcinoma [PDF]

Journal of Clinical and Translational Hepatology, 2016
Infection with hepatitis B and/or hepatitis C virus is a well-established risk factor for the development of hepatocellular carcinoma (HCC). However, it is now clear that certain occupational, environmental, and lifestyle factors also play a role in cancer development.
Hui-Chen Wu, Regina M. Santella
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Biomarkers of environmental benzene exposure. [PDF]

Environmental Health Perspectives, 1996
Environmental exposures to benzene result in increases in body burden that are reflected in various biomarkers of exposure, including benzene in exhaled breath, benzene in blood and urinary trans-trans-muconic acid and S-phenylmercapturic acid. A review of the literature indicates that these biomarkers can be used to distinguish populations with ...
Clifford P. Weisel, R. Yu, Ananya Roy, Panagiotis Georgopoulos   +3 more
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Long-term trends in the ambient PM_2.5- and O₃-related mortality burdens in the United States under emission reductions from 1990 to 2010 [PDF]

Atmospheric Chemistry and Physics, 2018
Concentrations of both fine particulate matter (PM2.5) and ozone (O3) in the United States (US) have decreased significantly since 1990, mainly because of air quality regulations.
Y. Zhang, Y. Zhang, J. J. West, R. Mathur, J. Xing, C. Hogrefe, S. J. Roselle, J. O. Bash, J. E. Pleim, C.-M. Gan, D. C. Wong   +10 more
doaj   +1 more source

Osmium: An Appraisal of Environmental Exposure [PDF]

Environmental Health Perspectives, 1974
In the U.S., the chief source of new osmium is copper refining, where this metal is produced as a byproduct. Probably less than 10% of the osmium in the original copper ore is recovered, and 1000-3000 oz troy of osmium is lost each year to the environment as the toxic, volatile tetroxide from copper smelters.
Ivan C. Smith, Thomas L. Ferguson, Bonnie L. Carson   +2 more
openaire   +3 more sources

Technical challenges and solutions in representing lakes when using WRF in downscaling applications [PDF]

Geoscientific Model Development, 2015
The Weather Research and Forecasting (WRF) model is commonly used to make high-resolution future projections of regional climate by downscaling global climate model (GCM) outputs.
M. S. Mallard, C. G. Nolte, T. L. Spero, O. R. Bullock, K. Alapaty, J. A. Herwehe, J. Gula, J. H. Bowden   +7 more
doaj   +1 more source

Distribution and Causes of Global Forest Fragmentation

Ecology and Society, 2003
Because human land uses tend to expand over time, forests that share a high proportion of their borders with anthropogenic uses are at higher risk of further degradation than forests that share a high proportion of their borders with non-forest, natural ...
Timothy G. Wade, Kurt Riitters, James D. Wickham, K. Bruce Jones   +3 more
doaj   +1 more source

Development and evaluation of a physics‐based windblown dust emission scheme implemented in the CMAQ modeling system

Journal of Advances in Modeling Earth Systems, 2017
A new windblown dust emission treatment was incorporated in the Community Multiscale Air Quality (CMAQ) modeling system. This new model treatment has been built upon previously developed physics‐based parameterization schemes from the literature.
H. Foroutan, J. Young, S. Napelenok, L. Ran, K. W. Appel, R. C. Gilliam, J. E. Pleim   +6 more
doaj   +1 more source

Global-Scale Patterns of Forest Fragmentation

Ecology and Society, 2000
We report an analysis of forest fragmentation based on 1-km resolution land-cover maps for the globe. Measurements in analysis windows from 81 km 2 (9 x 9 pixels, "small" scale) to 59,049 km 2 (243 x 243 pixels, "large" scale) were used to characterize ...
Kurt Riitters, James D. Wickham, Robert O'Neill, K. Bruce Jones, Elizabeth Smith   +4 more
doaj   +1 more source