Browsing by Subject "Carbon"
Now showing items 1-20 of 20
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A population model of folate-mediated one-carbon metabolism.
(Nutrients, 2013-07-05)BACKGROUND: Previous mathematical models for hepatic and tissue one-carbon metabolism have been combined and extended to include a blood plasma compartment. We use this model to study how the concentrations of metabolites ... -
Analyzing site selectivity in Rh2(esp)2-catalyzed intermolecular C-H amination reactions.
(J Am Chem Soc, 2014-04-16)Predicting site selectivity in C-H bond oxidation reactions involving heteroatom transfer is challenged by the small energetic differences between disparate bond types and the subtle interplay of steric and electronic effects ... -
Comparisons of Carbon and Water Fluxes of Pine Forests in Boreal and Temperate Climatic Zones
(2015)Quantifying carbon fluxes and pools of forest ecosystems is an active research area in global climate study, particularly in the currently and projected increasing atmospheric carbon dioxide concentration environment. Forest ... -
Connectivity Drives Function: Carbon and Nitrogen Dynamics in a Floodplain-Aquifer Ecosystem
(2012)Rivers interact with their valleys from headwaters to mouth, but nowhere as dynamically as in their floodplains. Rivers deliver water, sediments, and solutes onto the floodplain land surface, and the land in turn supplies ... -
Cytocidal amino acid starvation of Saccharomyces cerevisiae and Candida albicans acetolactate synthase (ilv2{Delta}) mutants is influenced by the carbon source and rapamycin.
(Microbiology, 2010-03)The isoleucine and valine biosynthetic enzyme acetolactate synthase (Ilv2p) is an attractive antifungal drug target, since the isoleucine and valine biosynthetic pathway is not present in mammals, Saccharomyces cerevisiae ... -
Deadwood stocks increase with selective logging and large tree frequency in Gabon.
(Glob Chang Biol, 2017-04)Deadwood is a major component of aboveground biomass (AGB) in tropical forests and is important as habitat and for nutrient cycling and carbon storage. With deforestation and degradation taking place throughout the tropics, ... -
Differential nutrient limitation of soil microbial biomass and metabolic quotients (qCO2): is there a biological stoichiometry of soil microbes?
(PLoS One, 2013)BACKGROUND: Variation in microbial metabolism poses one of the greatest current uncertainties in models of global carbon cycling, and is particularly poorly understood in soils. Biological Stoichiometry theory describes ... -
Direct carbon-carbon bond formation via reductive soft enolization: a kinetically controlled syn-aldol addition of α-halo thioesters and enolizable aldehydes.
(J Am Chem Soc, 2010-10-13)The direct addition of enolizable aldehydes and α-halo thioesters to produce β-hydroxy thioesters enabled by reductive soft enolization is reported. The transformation is operationally simple and efficient and has the unusual ... -
Environmental and genetic determinants of colony morphology in yeast.
(PLoS Genet, 2010-01-22)Nutrient stresses trigger a variety of developmental switches in the budding yeast Saccharomyces cerevisiae. One of the least understood of such responses is the development of complex colony morphology, characterized by ... -
Environmental impacts of the coal ash spill in Kingston, Tennessee: an 18-month survey.
(Environ Sci Technol, 2010-12-15)An 18 month investigation of the environmental impacts of the Tennessee Valley Authority (TVA) coal ash spill in Kingston, Tennessee combined with leaching experiments on the spilled TVA coal ash have revealed that leachable ... -
Extending Forest Rotation Age for Carbon Sequestration: A Cross-Protocol Comparison of Carbon Offsets of North American Forests
(2009-04-22)As the issue of climate change rises in prominence, growing attention is being paid to the ability of forests to mitigate rising atmospheric concentrations of CO2. Through carbon offset programs, forest owners can be offered ... -
Gabon’s Overlooked Carbon: A tropical forest study of coarse woody debris
(2013-04-26)Large dead trees and other large forest detritus (collectively known as coarse woody debris, or CWD) play an important role in the global carbon cycle. In tropical systems, CWD stocks (necromass) have been found to constitute ... -
Hydraulic redistribution of soil water by roots affects whole-stand evapotranspiration and net ecosystem carbon exchange.
(New Phytol, 2010-07)*Hydraulic redistribution (HR) of water via roots from moist to drier portions of the soil occurs in many ecosystems, potentially influencing both water use and carbon assimilation. *By measuring soil water content, sap ... -
Planning for Palm Oil: Are We Saving Wildlife by Saving Carbon?
(2016-04-29)Palm oil has become the most widely traded vegetable oil in the world. This has led to mass conversion of forests to monoculture plantations across the tropics, negatively impacting carbon stocks and wildlife habitat. As ... -
POLICY MECHANISMS TO REDUCE CO2 EMISSIONS FROM COMMUTERS IN GÄVLE, SWEDEN
(2010-04-30)In the municipality of Gävle, Sweden, the transportation sector accounts for as much as one third of total carbon emissions. The main contributors to carbon emissions in transportation are from freight and commuting traffic. ... -
Potential impacts of leakage from deep CO2 geosequestration on overlying freshwater aquifers.
(Environ Sci Technol, 2010-12-01)Carbon Capture and Storage may use deep saline aquifers for CO(2) sequestration, but small CO(2) leakage could pose a risk to overlying fresh groundwater. We performed laboratory incubations of CO(2) infiltration under oxidizing ... -
Surficial gains and subsoil losses of soil carbon and nitrogen during secondary forest development.
(Global change biology, 2015-02)Reforestation of formerly cultivated land is widely understood to accumulate above- and belowground detrital organic matter pools, including soil organic matter. However, during 40 years of study of reforestation in the ... -
Survey of the potential environmental and health impacts in the immediate aftermath of the coal ash spill in Kingston, Tennessee.
(Environ Sci Technol, 2009-08-15)An investigation of the potential environmental and health impacts in the immediate aftermath of one of the largest coal ash spills in U.S. history at the Tennessee Valley Authority (TVA) Kingston coal-burning power plant ... -
The effects of biochar on wetland and agricultural soil carbon and nitrogen emissions in North Carolina
(2016-04-29)Biochar is an increasingly popular topic in environmental management due to its potential effects on several ecosystem functions. Specifically, biochar has been linked to significant reductions in greenhouse gas emissions, ... -
U.S. Carbon Offset Policy: Risks, Uncertainties and What We Can Learn from Current Financial Markets
(2009-04-24)Climate change has become an increasingly important topic of political discussion and public concern. Although the United States has not signed the Kyoto Protocol, some individuals, companies, municipalities, states and ...
