Search

Your search keyword '"McConnell, Laura L."' showing total 24 results
Start Over Author "McConnell, Laura L." Search Limiters Full Text
24 results on '"McConnell, Laura L."'

8. Assessment of particulate matter and ammonia emission concentrations and respective plume profiles from a commercial poultry house

Author

Yao, Qi, primary, Yang, Zijiang, additional, Li, Hong, additional, Buser, Michael D., additional, Wanjura, John D., additional, Downey, Peter M., additional, Zhang, Chen, additional, Craige, Collin, additional, Torrents, Alba, additional, McConnell, Laura L., additional, Holt, Gregory A., additional, and Hapeman, Cathleen J., additional

Published
2018
Full Text
View/download PDF

11. Water quality and conservation practice effects in the Choptank River watershed

Author

McCarty, Gregory W., McConnell, Laura L., Hapeman, Cathleen J., Sadeghi, Ali, Graff, Carrie, Hively, W. Dean, Lang, Megan W., Fisher, Thomas R., Jordan, Thomas, Rice, Clifford P., Codling, Eton E., Whitall, David, Lynn, Anne, Keppler, Jason, and Fogel, Marilyn L.

Subjects
Land use -- United States, Land use -- Environmental aspects, Cover crops -- Environmental aspects, Denitrification -- Environmental aspects, Watersheds -- Protection and preservation, Conservation of natural resources -- Analysis, Conservation of natural resources -- United States
Published
2008

15. Utilizing thin-film solid-phase extraction to assess the effect of organic carbon amendments on the bioavailability of DDT and dieldrin to earthworms

Author

Andrade, Natasha. A., primary, Centofanti, Tiziana, additional, McConnell, Laura L., additional, Hapeman, Cathleen J., additional, Torrents, Alba, additional, Nguyen, Anh, additional, Beyer, W. Nelson, additional, Chaney, Rufus L., additional, Novak, Jeffrey M., additional, Anderson, Marya O., additional, and Cantrell, Keri B., additional

Published
2014
Full Text
View/download PDF

17. Utilizing single particle Raman microscopy as a non-destructive method to identify sources of PM10 from cattle feedlot operations

Author

Huang, Qiang, primary, McConnell, Laura L., additional, Razote, Edna, additional, Schmidt, Walter F., additional, Vinyard, Bryan T., additional, Torrents, Alba, additional, Hapeman, Cathleen J., additional, Maghirang, Ronaldo, additional, Trabue, Steven L., additional, Prueger, John, additional, and Ro, Kyoung S., additional

Published
2013
Full Text
View/download PDF

20. Utilizing single particle Raman microscopy as a non-destructive method to identify sources of PM10 from cattle feedlot operations

Author

Huang, Qiang, McConnell, Laura L., Razote, Edna, Schmidt, Walter F., Vinyard, Bryan T., Torrents, Alba, Hapeman, Cathleen J., Maghirang, Ronaldo, Trabue, Steven L., Prueger, John, and Ro, Kyoung S.

Subjects
*RAMAN microscopy, *NONDESTRUCTIVE testing, *PARTICULATE matter, *CATTLE feeding & feeds, *PARTICLE size distribution, *MULTIVARIATE analysis, *ACQUISITION of data
Abstract

Abstract: Emissions of particulate matter (PM) from animal feeding operations (AFOs) pose a potential threat to the health of humans and livestock. Current efforts to characterize PM emissions from AFOs generally examine variations in mass concentration and particle size distributions over time and space, but these methods do not provide information on the sources of the PM captured. Raman microscopy was employed as a non-destructive method to quantify the contributions of source materials to PM10 emitted from a large cattle feedlot. Raman spectra from potential source materials (dust from unpaved roads, manure from pen surface, and cattle feed) were compiled to create a spectral library. Multivariate statistical analysis methods were used to identify specific groups composing the source library spectra and to construct a linear discriminant function to identify the source of particles collected on PM10 sample filters. Cross validation of the model resulted in 99.76% correct classification of source spectra in the training group. Source characterization results from samples collected at the cattle feedlot over a two-day period indicate that manure from the cattle pen surface contributed an average of 78% of the total PM10 particles, and dust from unpaved roads accounted for an average of 19% with minor contributions from feed. Results of this work are promising and provide support for further investigation into an innovative method to identify agricultural PM10 sources accurately under different meteorological and management conditions. [Copyright &y& Elsevier]

Published
2013
Full Text
View/download PDF

23. Enhanced Dispersion and Removal of Ammonia Emitted from a Poultry House with a Vegetative Environmental Buffer.

Author

Ro, Kyoung S., Li, Hong, Hapeman, Cathleen J., Harper, Lowry A., Flesch, Thomas K., Downey, Peter M., McConnell, Laura L., Torrents, Alba, and Yao, Qi

Subjects
AMMONIA, POULTRY housing, ANIMAL feeding, METHANE, DISPERSION (Chemistry)
Abstract

Vegetative environmental buffers (VEBs), which are composed of tolerant trees, shrubs, and tall grasses, can be used to control and reduce the transport of ammonia (NH3) emissions from animal feeding operations (AFOs). However, the effectiveness of VEBs has not been quantitated. In this study, we measure the dispersion and removal of NH3 in simulated emissions from a small broiler house that was equipped with a VEB. The dispersion enhancement due to the VEB was estimated by comparing the measured downwind concentration of the co-released tracer gas, methane (CH4), to the theoretical CH4 concentrations at the same distance downwind without the VEB. The accuracy of the theoretical downwind concentrations calculated using the forward Lagrangian stochastic (fLS) technique was 95%, which was validated by comparing the measured and calculated CH4 concentrations in a separate experiment without the VEB. The VEB enhanced the dispersion of CH4 and reduced the downwind concentration to 63% of the theoretical concentration. In addition to dispersion, the VEB removed another 22% of the NH3, resulting in a net 51% decrease of the theoretical downwind concentration. These results clearly demonstrated that the VEB was effective both in dispersing and removing NH3 emitted from the broiler house. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

24. Utilizing Monitoring Data and Spatial Analysis Tools for Exposure Assessment of Atmospheric Pollutants in Denmark

Author

Ole Hertel, Steen Solvang Jensen, Matthias Ketzel, Thomas Becker, Robert George Peel, Pia Viuf Ørby, Carsten Ambelas Skjøth, Thomas Ellermann, Ole Raaschou-Nielsen, Mette Sørensen, Elvira Vaclavic Bräuner, Zorana Jovanovic Andersen, Steffen Loft, Vivi Schlünssen, Jakob Hjort Bønløkke, Torben Sigsgaard, McConnell, Laura L., Dachs, Jordi, and Hapeman, Cathleen J.

Published
2013

Catalog

Books, media, physical & digital resources
See catalog results