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1. Compressibility of Supercritical Methane in Nanopores: A Molecular Simulation Study

Author:
Corrente, Nicholas J.,   et al.   ; Dobrzanski, Christopher D.; Gor, Gennady Y.;     Show all 3 Authors
Source:
Energy & fuels 2020 v.34 no.2 pp. 1506-1513
ISSN:
1520-5029
Subject:
carbon; carbon dioxide; carbon sequestration; coal; coalbed methane; compressibility; equations; geophysics; methane; modulus of elasticity; molecular dynamics; nanopores; porosity; porous media; prediction; simulation models
Abstract:
... Unmineable coalbeds are a promising source of natural gas and can act as a receptacle for CO₂ sequestration. This is because they are composed of extensive nanoporous systems, which allow for significant amounts of methane or CO₂ to be trapped in the adsorbed state. The amount of the fluid confined in the coal seams can be determined from seismic wave propagation using the Gassmann equation. Howev ...
DOI:
10.1021/acs.energyfuels.9b03592

2. Tracking Yeast Metabolism and the Crabtree Effect in Real Time via CO2 Production using Broadband Acoustic Resonance Dissolution Spectroscopy (BARDS)

Author:
Doyle, Nicholas,   et al.   ; Ahmed, M. Rizwan; Connolly, Cathal; McSweeney, Seán; Krüse, Jacob; Morrissey, John; Prentice, Michael B.; Fitzpatrick, Dara;     Show all 8 Authors
Source:
Journal of biotechnology 2020 v.308 pp. 63-73
ISSN:
0168-1656
Subject:
Crabtree effect; acoustics; biochemical pathways; carbon; carbon dioxide; carbon dioxide production; compressibility; equations; magnetism; microbial physiology; monitoring; solutes; solvents; spectroscopy; viability; yeasts
Abstract:
... In this study, a new approach to measure metabolic activity of yeast via the Crabtree effect is described. BARDS is an analytical technique developed to aid powder and tablet characterisation by monitoring changes in the compressibility of a solvent during solute dissolution. It is a rapid and simple method which utilises a magnetic stir bar to mix added solute and induce the acoustic resonance of ...
DOI:
10.1016/j.jbiotec.2019.11.016

3. Resource subsidies from adfluvial fishes increase stream productivity

Author:
Jones, Nicholas E.,   et al.   ; Mackereth, Robert W.;     Show all 2 Author
Source:
Freshwater biology 2016 v.61 no.6 pp. 991-1005
ISSN:
0046-5070
Subject:
Catostomus catostomus; Catostomus commersonii; Oncorhynchus gorbuscha; ammonium; ammonium compounds; anadromous fish; aquatic food webs; biomass; carbon; dead animals; diet; ecosystems; eggs; energy; equations; excretion; freshwater; growing season; invertebrates; lakes; life history; microorganisms; milt; mortality; nitrogen; nutrients; organic matter; potamodromous fish; rivers; salmon; spawning; stable isotopes; statistical models; streams; subsidies
Abstract:
... Anadromous fishes are well known to shape the structure and function of recipient ecosystems by introducing nutrients and rich organic matter from the ocean. In contrast, the importance of potamodromous migrations, confined to freshwater, and the subsidies they provide to stream ecosystems has received much less attention. Our objective was to determine the importance of excretion, eggs, milt, and ...
DOI:
10.1111/fwb.12762

4. Allometric models and aboveground biomass stocks of a West African Sudan Savannah watershed in Benin

Author:
Kyei-Baffour, Nicholas,   et al.   ; Chabi, Adéyèmi; Lautenbach, Sven; Orekan, Vincent Oladokoun Agnila;     Show all 4 Authors
Source:
Carbon balance and management 2016 v.11 no.1 pp. 16
ISSN:
1750-0680
Subject:
Azadirachta indica; Eucalyptus grandis; Gmelina arborea; Tectona grandis; aboveground biomass; agroforestry; allometry; carbon; carbon footprint; carbon sinks; cropland; deforestation; ecological zones; emissions; equations; fallow; forest inventory; global carbon budget; grasslands; land cover; land use change; models; plantations; protocols; remote sensing; riparian forests; savanna woodlands; savannas; shrubs; tree and stand measurements; trees; uncertainty; variance; watersheds; wood density; Benin; Sudan
Abstract:
... BACKGROUND: The estimation of forest biomass changes due to land-use change is of significant importance for estimates of the global carbon budget. The accuracy of biomass density maps depends on the availability of reliable allometric models used in combination with data derived from satellites images and forest inventory data. To reduce the uncertainty in estimates of carbon emissions resulting ...
DOI:
10.1186/s13021-016-0058-5
PubMed:
27594897
PubMed Central:
PMC4989002

5. Comparison of carbon-stock changes, eddy-covariance carbon fluxes and model estimates in coastal Douglas-fir stands in British Columbia

Author:
Coops, Nicholas C,   et al.   ; Ferster, Colin J; Trofymow, JA (Tony); Chen, Baozhang; Black, Thomas Andrew;     Show all 5 Authors
Source:
Forest Ecosystems 2015 v.2 no.1 pp. 13
Subject:
Pseudotsuga menziesii var. menziesii; carbon; clearcutting; eddy covariance; equations; forest ecosystems; forest inventory; forests; juveniles; models; net ecosystem production; remote sensing; soil; topography; British Columbia
Abstract:
... BACKGROUND: The global network of eddy-covariance (EC) flux-towers has improved the understanding of the terrestrial carbon (C) cycle, however, the network has a relatively limited spatial extent compared to forest inventory data and plots. Developing methods to use inventory-based and EC flux measurements together with modeling approaches is necessary evaluate forest C dynamics across broad spati ...
DOI:
10.1186/s40663-015-0038-3

6. Anomalous Isosteric Enthalpy of Adsorption of Methane on Zeolite-Templated Carbon

Author:
Stadie, Nicholas P.,   et al.   ; Murialdo, Maxwell; Ahn, Channing C.; Fultz, Brent;     Show all 4 Authors
Source:
Journal of the American Chemical Society 2013 v.135 no.3 pp. 990-993
ISSN:
1520-5126
Subject:
adsorption; carbon; enthalpy; equations; heat; methane; micropores; surface area; temperature
Abstract:
... A thermodynamic study of the enthalpy of adsorption of methane on high surface area carbonaceous materials was carried out from 238 to 526 K. The absolute quantity of adsorbed methane as a function of equilibrium pressure was determined by fitting isotherms to a generalized Langmuir-type equation. Adsorption of methane on zeolite-templated carbon, an extremely high surface area material with a per ...
DOI:
10.1021/ja311415m

7. Evolution of Carbon Clusters in the Detonation Products of the Triaminotrinitrobenzene (TATB)-Based Explosive PBX 9502

Author:
Sinclair, Nicholas,   et al.   ; Watkins, Erik B.; Velizhanin, Kirill A.; Dattelbaum, Dana M.; Gustavsen, Richard L.; Aslam, Tariq D.; Podlesak, David W.; Huber, Rachel C.; Firestone, Millicent A.; Ringstrand, Bryan S.; Willey, Trevor M.; Bagge-Hansen, Michael; Hodgin, Ralph; Lauderbach, Lisa; van Buuren, Tony; Rigg, Paulo A.; Seifert, Soenke; Gog, Thomas;     Show all 18 Authors
Source:
The Journal of Physical Chemistry C 2017 v.121 no.41 pp. 23129-23140
ISSN:
1932-7455
Subject:
X-radiation; carbon; equations; explosives; models; particle size; physical chemistry; temperature; thermodynamics
Abstract:
... The detonation of carbon-rich high explosives yields solid carbon as a major constituent of the product mixture, and depending on the thermodynamic conditions behind the shock front, a variety of carbon allotropes and morphologies may form and evolve. We applied time-resolved small-angle X-ray scattering (TR-SAXS) to investigate the dynamics of carbon clustering during detonation of PBX 9502, an e ...
DOI:
10.1021/acs.jpcc.7b05637

8. Assessing Tower Flux Footprint Climatology and Scaling Between Remotely Sensed and Eddy Covariance Measurements

Author:
Coops, Nicholas C.,   et al.   ; Chen, Baozhang; Black, T. Andrew; Hilker, Thomas; (Tony) Trofymow, J. A.; Morgenstern, Kai;     Show all 6 Authors
Source:
Boundary-layer meteorology 2009 v.130 no.2 pp. 137-167
ISSN:
0006-8314
Subject:
Pseudotsuga menziesii; algorithms; canopy; carbon; climatology; ecosystems; eddy covariance; equations; lidar; models; primary productivity; remote sensing; spectroradiometers; surface roughness; uncertainty; wind speed; Canada
Abstract:
... We describe pragmatic and reliable methods to examine the influence of patch-scale heterogeneities on the uncertainty in long-term eddy-covariance (EC) carbon flux data and to scale between the carbon flux estimates derived from land surface optical remote sensing and directly derived from EC flux measurements on the basis of the assessment of footprint climatology. Three different aged Douglas-fi ...
DOI:
10.1007/s10546-008-9339-1

9. The carbon balance of two lodgepole pine stands recovering from mountain pine beetle attack in British Columbia

Author:
Grant, Nicholas J.,   et al.   ; Brown, Mathew G.; Black, T. Andrew; Nesic, Zoran; Fredeen, Arthur L.; Foord, Vanessa N.; Spittlehouse, David L.; Bowler, Rebecca; Burton, Philip J.; Trofymow, J.A.; Lessard, Dominic;     Show all 11 Authors
Source:
Agricultural and forest meteorology 2012 v.153 pp. 82-93
ISSN:
0168-1923
Subject:
Dendroctonus ponderosae; Pinus contorta var. latifolia; annuals; canopy; carbon; drought; ecosystem respiration; ecosystems; eddy covariance; equations; evapotranspiration; forests; growing season; mortality; net ecosystem production; photosynthesis; saplings; seedlings; soil temperature; water use efficiency; British Columbia
Abstract:
... Disturbances play an important role in determining the C balance of North American forests. This study used the eddy covariance (EC) technique to examine the impact of mountain pine beetle (MPB) (Dendroctonus ponderosae) outbreak on the gross ecosystem photosynthesis (Pg), ecosystem respiration (Rₑ) and net ecosystem production (NEP), of two lodgepole pine-dominated stands in the central interio ...
DOI:
10.1016/j.agrformet.2011.07.010