A5014596547- Geology and Paleoclimatology Research
- Acute Myeloid Leukemia Research
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Reservoir Engineering and Simulation Methods
- Soil and Water Nutrient Dynamics
- Seismic Imaging and Inversion Techniques
- Paleontology and Stratigraphy of Fossils
- Drilling and Well Engineering
- Evolution and Paleontology Studies
- Groundwater and Isotope Geochemistry
- Geological formations and processes
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Physiological and biochemical adaptations
- Pleistocene-Era Hominins and Archaeology
- Retinoids in leukemia and cellular processes
- Hydrology and Watershed Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Protein Degradation and Inhibitors
- Paleontology and Evolutionary Biology
- Wastewater Treatment and Nitrogen Removal
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Marine Biology and Ecology Research
University of Colorado Anschutz Medical Campus
2024
University of Colorado Denver
2022-2024
North Carolina State University
2003-2018
University of Cincinnati
2012
University of New Hampshire
2011
North Carolina Department of Environmental Quality
2008
Monterey Bay Aquarium Research Institute
2007
University of Washington
2007
Clinical Research Consortium
2005
Physical Sciences (United States)
2005
Surface winds and surface ocean hydrography in the subpolar North Atlantic appear to have been influenced by variations solar output through entire Holocene. The evidence comes from a close correlation between inferred changes production rates of cosmogenic nuclides carbon-14 beryllium-10 centennial millennial time scale proxies drift ice measured deep-sea sediment cores. A forcing mechanism therefore may underlie at least Holocene segment Atlantic's "1500-year" cycle. hydrographic affected...
Evidence from North Atlantic deep sea cores reveals that abrupt shifts punctuated what is conventionally thought to have been a relatively stable Holocene climate. During each of these episodes, cool, ice-bearing waters north Iceland were advected as far south the latitude Britain. At about same times, atmospheric circulation above Greenland changed abruptly. Pacings events and climate during last glaciation are statistically same; together, they make up series with cyclicity close 1470 ±...
Abstract The BCL2 inhibitor venetoclax has recently emerged as an important component of acute myeloid leukemia (AML) therapy. Notably, use this agent revealed a previously unrecognized form pathogenesis characterized by monocytic disease progression. We demonstrate that arises from fundamentally different type stem cell (LSC), which we designate LSC (m-LSC), is developmentally and clinically distinct the more well-described primitive (p-LSC). m-LSC distinguished unique immunophenotype...
Abyssal chemosynthetic communities are supported by bacterial oxidation of reduced chemicals in brines which seep out through sediments at the base Florida Escarpment. They surrounded carbonate hardgrounds and rich fresh organic carbon that contain a record metabolic pathways geochemical processes active these sites. The isotopic composition tissue samples (δ 13 C as low #7576.40∓), crusts #7545.19∓) sedimentary matter #7567.87∓) indicate biogenic methane dissolved #7583.3 ± 5.8∓) is major...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of phosphate samples for oxygen isotope analysisRonald A. Crowson, William J. Showers, Ellen K. Wright, and Thomas C. HoeringCite this: Anal. Chem. 1991, 63, 20, 2397–2400Publication Date (Print):October 15, 1991Publication History Published online1 May 2002Published inissue 15 October 1991https://pubs.acs.org/doi/10.1021/ac00020a038https://doi.org/10.1021/ac00020a038research-articleACS PublicationsRequest reuse permissionsArticle...
The oxygen isotopic composition of vertebrate bone phosphate (δ p ) is related to ingested water and the body temperature at which forms. δ in equilibrium with individual's water, a physiological steady state throughout body. Therefore, intrabone variation mean interbone differences well-preserved fossil vertebrates can be determined from variation. Values Tyrannosaurus rex suggest that this species maintained homeothermy less than 4°C variability temperature. Maintenance implies relatively...
The oxygen isotope composition of tooth enamel phosphate (68) from cheek teeth in jaws modern equids is compared with that fossil Thomson and Burge quarries (Miocene, Nebraska) to determine if paleobiologic taphonomic signatures are preserved the 8p offossil teeth. Three distinct patterns variation found jaws. Each pattern can be related season birth. An mass balance model incorporates seasonality nursing offoals during mineralization used interpret along toothrow. range for same position...
ABSTRACT Natural‐abundance δ 15 N showed that nitrate generated from commercial land application of swine ( Sus scrofa domesticus ) waste within a North Carolina Coastal Plain catchment was being discharged to surface waters by ground water passing beneath the sprayfields and adjacent riparian buffers. This significant because intensive farms in are considered non‐discharge operations, buffers with minimum widths 7.6 m (25 ft) primary regulatory control on export these operations. study...
The carbon isotopic composition of methane emitted by the Alaskan emergent aquatic plants Arctophila fulva , a tundra mid‐lake macrophyte, and Carex rostrata lake margin was −58.6 ± 0.5 ( n =2) −66.6±2.5 = 6) ‰ respectively. these species found to be depleted in 13 C 12‰ 18‰, relative withdrawn from plant stems 1 2 cm below waterline. As macrophyte‐mediated flux represented approximately 97% sites, results suggest more rapid transport 12 CH 4 through atmosphere. This preferential release...
Methane flux from plots of Peltandra virginica in a bottomland hardwood swamp southeast Virginia varied 270 to 670 mg CH 4 m −2 d −1 May August and was 6 times greater than the unvegetated adjacent open waters. Variations chamber temperature, light, CO 2 levels failed produce systematic changes rate or its isotopic composition vegetated plots, suggesting that is independent stomatal aperture hourly variations photosynthetic rate. Comparisons different techniques for collection analysis...
The total methane flux to the troposphere from tundra environments of Yukon‐Kuskokwim Delta is dominated by emissions wet meadow (∼75%) and small, organic‐rich lakes (∼20%). mean δ 13 C value diffusing into collar‐mounted chambers near Bethel, Alaska, was −65.82 ± 2.21‰ (±1 sigma, n = 18) for period July 10 August 10, 1988. Detritus‐rich sediments lakes, including margins large entire submerged areas smaller ones, are laden with gas bubbles whose concentration ranges 11% 79%. Lowest...