Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Jonathan D. Karr"'
Autor:
Gary S. Dwyer, Avner Vengosh, Rachel M. Coyte, Jonathan D. Karr, Andrew J. Kondash, Christina C. Davis, Amy J. Keyworth, Kristen L. McKinley
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Jonathan D. Karr, Rose B. Merola, Gary S. Dywer, Avner Vengosh, Laura S. Ruhl, Jennifer S. Harkness, Andrew J. Kondash, Rachel M. Coyte
Publikováno v:
Environmental Science & Technology Letters. 3:409-414
Hexavalent chromium [Cr(VI)] is a known pulmonary carcinogen. Recent detection of Cr(VI) in drinking water wells in North Carolina has raised public concern about contamination of drinking water wells by nearby coal ash ponds. Here we report, for the
Autor:
Amy J. Keyworth, Rachel M. Coyte, Christina C. Davis, Jonathan D. Karr, Avner Vengosh, Kristen L. McKinley, Sheng Jiang, Andrew J. Kondash, Gary S. Dwyer
Publikováno v:
Science of The Total Environment. 711:135135
Hexavalent chromium (Cr(VI)) is a groundwater contaminant that is potentially harmful to human health. Understanding the occurrence of Cr(VI) in groundwater resources is critical for evaluating its risks to human health. Here we report a large datase
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Robert B. Jackson, Nathaniel R. Warner, Adrian Down, Phillip D. Hays, Jonathan D. Karr, Timothy M. Kresse, Avner Vengosh
Publikováno v:
Applied Geochemistry. 35:207-220
Exploration of unconventional natural gas reservoirs such as impermeable shale basins through the use of horizontal drilling and hydraulic fracturing has changed the energy landscape in the USA providing a vast new energy source. The accelerated prod
Autor:
Eric R. Crosson, Nathan Phillips, Jonathan D. Karr, Lucy R. Hutyra, Max N. Brondfield, Kaiguang Zhao, Robert C. Ackley, Robert B. Jackson, Adrian Down
Publikováno v:
Environmental Pollution. 173:1-4
Natural gas is the largest source of anthropogenic emissions of methane (CH(4)) in the United States. To assess pipeline emissions across a major city, we mapped CH(4) leaks across all 785 road miles in the city of Boston using a cavity-ring-down mob
Autor:
Jonathan D. Karr, Bruce A. Barnett, Nicolas Cassar, Jean-Philippe Bellenger, Robert B. Jackson
Publikováno v:
Oecologia. 168:335-342
The most common currency for estimating N2 fixation is acetylene reduction to ethylene. Real-time esti- mates of nitrogen fixation are needed to close the global nitrogen budget and these remain a critical gap in both laboratory and field experiments
Publikováno v:
Environmental Biology of Fishes. 93:61-71
Isotopic ratios of fish otoliths have been used in numerous studies as natural tags or markers to aid in the study of connectivity among fish populations. We investigated the use of spatial and temporal changes in the stable carbon and oxygen isotope
Publikováno v:
Agriculture, Ecosystems & Environment. 95:103-110
Animal waste-produced nitrate in streams can be detected with natural abundance nitrogen isotopes even when stream nitrate concentrations are low and derive predominantly from natural soil nitrate sources. The objective of this limited study was to d
Publikováno v:
Groundwater Monitoring & Remediation. 22:68-75
Nitrate-contaminated ground water beneath and adjacent to an intensive swine (Sus scrofa domesticus) production facility in the Middle Coastal Plain of North Carolina was analyzed for δ15N of nitrate (δ15N-NO3). Results show that the isotopic signa