A5103007891- Geology and Paleoclimatology Research
- Fluorine in Organic Chemistry
- Soil erosion and sediment transport
- Cyclopropane Reaction Mechanisms
- Hydrology and Sediment Transport Processes
- Archaeology and ancient environmental studies
- Marine Biology and Ecology Research
- Botany, Ecology, and Taxonomy Studies
- Porphyrin and Phthalocyanine Chemistry
- Isotope Analysis in Ecology
- Pacific and Southeast Asian Studies
- Surface Modification and Superhydrophobicity
- Hydrology and Watershed Management Studies
- Fluid Dynamics and Thin Films
- Radical Photochemical Reactions
- Marine and fisheries research
- Coastal wetland ecosystem dynamics
- Chemical Reactions and Isotopes
- Mine drainage and remediation techniques
- Crystal structures of chemical compounds
- Heme Oxygenase-1 and Carbon Monoxide
- Hemoglobin structure and function
- Chemical Synthesis and Analysis
- Chemical Reactions and Mechanisms
- Synthesis and characterization of novel inorganic/organometallic compounds
United States Geological Survey
2017-2020
Menlo School
2017
Kansas State University
1992-2010
Clemson University
1998-2001
University of Kansas
1972-1995
Abstract The salinity gradient of estuaries plays a unique and fundamental role in structuring spatial patterns physical properties, biota, biogeochemical processes. We use variability along the San Francisco Bay to illustrate some lessons about diversity structures their over time. Spatial dissolved constituents (e.g., silicate) can be linear or nonlinear, depending on relative importance river‐ocean mixing internal sinks (diatom uptake). Particles have different because they accumulate...
Abstract Nutrient enrichment has degraded many of the world’s estuaries by amplifying algal production, leading to hypoxia/anoxia, loss vascular plants and fish/shellfish habitat, expansion harmful blooms (HABs). Policies protect coastal waters from effects nutrient require information determine if a water body is impaired nutrients regulatory actions are required. We compiled inform these decisions for San Francisco Bay (SFB), an urban estuary where best path toward management not yet...
Abstract Radiocarbon dating of three organic matter fractions (total, humic acid, and residue) isolated from late Quaternary buried soils the central Great Plains reveals that there often are considerable differences among, but no consistent order to, ages fractions. For Holocene soils, residue fraction or total generally produces oldest age; for Pleistocene however, was consistently oldest. The absence a sequence is attributed to postburial contamination soils. When bulk samples same soil...
Abstract Alluvium in one reach of the Republican River valley, south-central Nebraska, dates to Holocene. Radiocarbon dating fills underlying two terraces valley reveals that entrenchment between 4500 and 3700 yr B.P. formed high terrace. Subsequently, alternating aggradation stability occurred until sometime 1800 1100 Following another period alluviation, channel incision low General synchrony this chronology other late Holocene fluvial chronologies central Great Plains suggests climatic...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiaryldichlorocarbonyl ylides derived from dichlorocarbene and aromatic ketonesCharles W. Martin, Harpal S. Gill, John A. LandgrebeCite this: J. Org. Chem. 1983, 48, 11, 1898–1901Publication Date (Print):June 1, 1983Publication History Published online1 May 2002Published inissue 1 June 1983https://pubs.acs.org/doi/10.1021/jo00159a022https://doi.org/10.1021/jo00159a022research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHalogenated carbonyl ylides in the reactions of mercurial dihalocarbene precursors with substituted benzaldehydesCharles W. Martin, Paul R. Lund, Erich Rapp, and John A. LandgrebeCite this: J. Org. Chem. 1978, 43, 6, 1071–1076Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/jo00400a009https://doi.org/10.1021/jo00400a009research-articleACS...
The intermediacy of a carbonyl ylide is used to explain why treatment benzaldehyde with phenyl(bromodichloromethyl)mercury produced phenylmercuric bromide, carbon monoxide, benzal halide, and methyl 2,4-diphenyl-3,5-dioxahexanoate as major products.
ABSTRACT The Prudhoe Bay Field-Sadlerochit Reservoir presents many complexities which make reservoir simulation of this large oil accumulation difficult. presence major faults, the existence shale complexes, enormous gas cap and associated coning wells, heavy oil/tar mat could cause, even if each existed separately, problems for a standard model. This paper describes techniques were used by ARCO Oil Gas to overcome these difficulties in modeling Field. Because areal extent field, unique grid...
Evidence is presented that the reaction of phenyldichlorobromomethylmercury with benzophenone results in formation carbon monoxide, dichlorodiphenylmethane, and chlorodiphenylacetyl chloride, may involve intermediacy a complex between mercurial addition to carbonyl ylide and/or dichloro-oxiran.
Generative AI capabilities are rapidly transforming how we perceive, interact with, and relate to machines. This one-day workshop invites HCI researchers, designers, practitioners imaginatively inhabit explore the possible futures that might emerge from humans combining generative into everyday technologies at massive scale. Workshop participants will craft stories, visualisations, prototypes through scenario-based design investigate these futures, resulting in production of an...