Results 251 to 260 of about 1,786,583 (270)

Biosolids Impact Soil Phosphorus Accountability, Fractionation, and Potential Environmental Risk

Journal of Environmental Quality, 2007
AbstractBiosolids land application rates are typically based on crop N requirements but can lead to soil P accumulation. The Littleton/Englewood, Colorado, wastewater treatment facility has supported biosolids beneficial‐use on a dryland wheat‐fallow agroecosystem site since 1982, with observable soil P concentration increases as biyearly repeated ...
J A, Ippolito, K A, Barbarick, K L, Norvell   +2 more
openaire   +2 more sources

Categorical versus continuous risk factors and the calculation of potential impact fractions

Journal of Epidemiology and Community Health, 2009
Background The potential impact fraction is a measure of effect that calculates the proportional change in disease risk after a change in the exposure of a related risk factor. Potential impact fractions are increasingly used to calculate attributable fractions when the lowest exposure is non-zero.
Barendregt, Jan J., Veerman, J. Lennert
openaire   +3 more sources

Fractionation studies of trace elements in Polish uranium-bearing geological materials: potential environmental impact

International Journal of Environmental Analytical Chemistry, 2015
The samples of U deposits from Podlasie Depression (East Poland) and Peribaltic Syneclise (Northeast Poland) were studied to state the U and accompanied metal content and to estimate a potential environmental impact caused by the studied area. Sequential extraction is an effective method for assessing the heavy metal behaviour in environment in such ...
Iwona Bartosiewicz, Jadwiga Chwastowska, Halina Polkowska-Motrenko   +2 more
openaire   +1 more source

Geochemical Fractionation and Potential Ecological Risk of Cadmium and Lead in Soils Impacted by Secondary Lead Refinery

Bulletin of Environmental Contamination and Toxicology, 2018
Total and geochemical associations of Cd and Pb were studied on 75 topsoil samples around a small secondary metal recovery factory, which stopped operations in April 2006 due to metal environmental problems in surrounding communities. After a decade, we evaluated the potential ecological risk of Cd and Pb in impacted soils calculating the risk ...
M. F. Soto-Jiménez, D. Olvera-Balderas
openaire   +2 more sources

Impact of aeration disturbances on endogenous phosphorus fractions and their algae growth potential from malodorous river sediment

Environmental Science and Pollution Research, 2017
The present work assessed the impact of aeration disturbances on sediment-bound phosphorus fractions and their algae growth potential from a typical malodorous river. Phosphorus was sequentially extracted by a modified version of Hedley fractionation method.
Jin, Zhu, Yan, He, Jianhua, Wang, Zhaochao, Qiao, Yi, Wang, Zhihong, Li, Minsheng, Huang   +6 more
openaire   +2 more sources

The impact of surface evaporative fraction on boundary layer equivalent potential temperature

Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere, 1999
Abstract The impact of the land surface on the potential for precipitating convection is examined. This is done by deriving an analytical relation between the boundary layer equivalent potential temperature and the surface evaporative fraction, using a 1-D model of the convective boundary layer.
openaire   +1 more source

Anti-fibrotic potential of a Matthiola arabica isothiocyanates rich fraction: impact on oxidative stress, inflammatory and fibrosis markers.

Die Pharmazie, 2017
The present study is the first one to investigate the glucosinolates (GLS) profile and anti-fibrotic effect of isothiocyanates (ITCs) rich fraction of Matthiola arabica (Brassicaceae) using an experimental model of liver fibrosis in rats. Five GLS (ethyl glucosinolate, gluconapin, glucodehydroerucin, glucoerucin and glucoraphanin) were identified by ...
Mohammed, E. D., El-Naga, R. N., Lotfy, R. A., Al-Gendy, A. A., El-Demerdash, E.   +4 more
openaire   +2 more sources

A Bayesian approach for estimating the partial potential impact fraction with exposure measurement error under a main study/internal validation design

Statistical Methods in Medical Research, 2021
The partial potential impact fraction describes the proportion of disease cases that can be prevented if the distribution of modifiable continuous exposures is shifted in a population, while other risk factors are not modified. It is a useful quantity for evaluating the burden of disease in epidemiologic and public health studies.
Xinyuan Chen, Joseph Chang, Donna Spiegelman, Fan Li   +3 more
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Phosphorus distribution in soil aggregate size fractions in a poultry litter applied soil and potential environmental impacts

Geoderma, 2013
Long-term poultry litter (PL) application in pasture soil was found to enhance accumulation of certain phosphorus (P) forms in soil micro-aggregate fractions and have potential impacts on non-point water pollution by wind erosion or run-off. A P fractionation method was utilized to identify P forms in aggregate fractions derived from a long-term PL ...
Thilini D. Ranatunga, Seshadri S. Reddy, Robert W. Taylor   +2 more
openaire   +1 more source