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Displaying 1 - 25 of 1415

Low-Level (Submicromole) Environmental 14 C Metrology

October 1, 2000
Author(s)
Lloyd A. Currie, J D. Kessler, J V. Marolf, A. P. McNichol, D R. Stuart, J C. Donoghue, D. J. Donahue, William Burr, D Biddulph
… Low-Level (Submicromole) Environmental 14 C Metrology …

Evolution and Multidisciplinary Frontiers of C-14 Aerosol Science

June 1, 2000
Author(s)
Lloyd A. Currie
… occurred shortly after the initial development of 14 C dating. Unlike dating, which is founded on the continual decay of 14 C and the resulting full range of 14 C/12C ratios in once-living matter, 14 C applications to … Evolution and Multidisciplinary Frontiers of C-14 Aerosol Science …

14 C Measurements of Sub-Milligram Carbon Samples From Aerosols

August 1, 1998
Author(s)
R Weissenbok, S R. Biegalski, D Klinedinst, R Golser, George A. Klouda, W Kutschera, A Priller, William N. Rom, P Steier, E Wild, Lloyd A. Currie, R F. Sekerka
… and data evaluation, to meet the special requirements for 14 C AMS measurements at the microgram-carbon level. … the Vienna Environmental Research Accelerator (VERA) from 14 C measurements of a snow sample from Gaithersburg, MD, … 14 C Measurements of Sub-Milligram Carbon Samples From …

Surrogate Gas Prediction Model as a Proxy for {D}14C-Based Measurements of Fossil Fuel-CO2

June 27, 2016
Author(s)
Kevin J. Coakley, Benjamin Miller, Stephen A. Montzka, Colm Sweeney, Ben Miller, John B. Miller
In contrast to CO2 produced in the atmosphere by all other sources, CO2 produced by the combustion of fossil fuels is devoid of 14C. Thus, the measured 14C: 12C isotopic ratio of atmospheric CO2 (and its associated derived {Δ}14C value) is an ideal tracer

Hydrogen Cyanide H 13 C 14 N Absorption Reference for 1530 nm to 1560 nm Wavelength Calibration SRM 2519

November 1, 1998
Author(s)
Sarah L. Gilbert, William C. Swann, Chih-Ming Wang
… absorption cell containing hydrogen cyanide (H 13 C 14 N) gas. Hydrogen cyanide has more than 50 accurately … absorption cell, hydrogen cyanide (H 13 C 14 N), hydrogen cyanide (H 13 C 14 N) gas, optical-fiber, Standard Reference Material (SRM), … Hydrogen Cyanide H 13 C 14 N Absorption Reference for 1530 nm to 1560 nm Wavelength …

The Remarkable Metrological History of 14 C Dating: From Ancient Egyptian Artifacts to Particles of Soot and Grains of Pollen

January 1, 2003
Author(s)
Lloyd A. Currie
… Radiocarbon dating would not have been possible if 14 C had not had the wrong half-life -- a fact that delayed … by Rumen and Kamen, it became clear to W. F. Libby that 14 C should exist in nature, and that it could serve as a … and major (revolutionary) advances that have brought 14 C measurement from a crude, bulk [8g carbon] dating tool, …

Three-dimensional characterization of particle size, shape, and internal porosity for Apollo 11 and Apollo 14 lunar regolith and JSC-1A lunar regolith soil simulant

June 8, 2024
Author(s)
Jay Goguen, Andrew Sharits, Ann Chiaramonti Debay, Thomas V. Lafarge, Edward Garboczi
… collected by the Apollo 11 mission (10084) and the Apollo 14 mission (14163) were obtained from the NASA CAPTEM … lunar soil can be quantitatively compared. Approximately 14,000 lunar regolith particles and 128,000 JSC1-A particles, … lunar regolith, Apollo 11, 10084, Apollo 14, 14163, JSC-1A, light scattering, three dimensional, size …

Flux Pinning of Bi 2 Sr 2 CaCu 2 O 8+g /Ag Superconductors Utilizing (Sr,Ca) 14 Cu 24 O 41 Defects and Nanophase Al 2 O 3 and Au Particles

June 1, 2000
Author(s)
T J. Haugan, Winnie K. Wong-Ng, Lawrence P. Cook, H J. Brown, L Swartzendruber, D T. Shaw
… thick film conductors utilizing micron-sized (Sr,Ca) 14 Cu 24 O 41 and nanophase Al 2 O 3 and Au particles are … (Sr, Ca) 14 Cu 24 O 41 , (Sr, Ca 3 Al 2 O 6 ), Bi 2 Sr 2 CaCu 2 O … 2 Sr 2 CaCu 2 O 8+g /Ag Superconductors Utilizing (Sr,Ca) 14 Cu 24 O 41 Defects and Nanophase Al 2 O 3 and Au Particles …

Phase Relations of the SrO-Ho 2 O 3 -CuO x System

February 1, 2000
Author(s)
Winnie K. Wong-Ng, J Dillingham, Lawrence P. Cook
… green phase SrHo 2 CuO 5 and the A14-24 solid solution (Sr 14-x Ho x )Cu 24 O 41 . The green phase is isostructural to … to substitute for the Sr site in the solid solution (Sr 14-x Ho x )Cu 24 O 41 up to the value of x . 5. The melting … 14-24 phase, crystal chemistry, green phase, phase diagram, …

Biodegradation of 14C-labeled Multi-Walled Carbon Nanotubes

October 1, 2013
Author(s)
Liwen Zhang, Elijah Petersen, Mussie Habteselassie, Qingguo Huang
Environmental transformations of multi-walled carbon nanotubes (MWCNTs) can change their environmental fate and is important to their life cycle assessment, but has not yet been fully investigated due to its high recalcitrance. We are reporting a bacterial

Energy Absorption by N 2 O in the 4 to 14 eV Region

November 15, 1975
Author(s)
R Huebner, Robert Celotta, S Mielczarek, C Kuyatt
… oscillator-strength values for transitions in the 4 to 14 eV region in nitrous oxide have been derived from electron … Energy Absorption by N 2 O in the 4 to 14 eV Region …

Saturation molalities and standard molar enthalpies of solution of alpha-D-xylose(cr) in H2O(l); Standard molar enthalpies of solution of 1,4-beta-D-xylobiose(am), and 1,4-beta-D-xylotriose(am) in H2O(l)

May 14, 2012
Author(s)
Robert N. Goldberg, Brian E. Lang, Bruce Coxon, Stephen R. Decker
… for alpha-D xylose(cr); ΔsolHom = (8.1 ± 2.7) kJ∙mol-1 for 1,4-alpha-D-xylobiose(am); and ΔsolHm = -(24.1 ± 6.4) kJ∙mol-1 for 1,4--D-xylotriose(am). It was observed that both 1,4-beta-D-xylobiose(am) and 1,4-beta-D-xylotriose(am) were … in H2O(l); Standard molar enthalpies of solution of 1,4-beta-D-xylobiose(am), and 1,4-beta-D-xylotriose(am) in …

Generation of Firebrands from the Burning of Full-Scale Vegetation in the Absence of Ambient Wind

October 23, 2023
Author(s)
Isaac Leventon, Mahdi Tlemsani, Mohammadhadi Hajilou, Xiaoyu Ju, Michael Gollner
… 9 Between December 2019 and January 2020, 14 full-scale experiments were conducted at the University of … mass, time-resolved mass loss rate during burning, mass of 14 firebrands generated, and time-resolved total heat flux (2 … and 128 %. 22 Firebrand yield has been reported elsewhere[1,2]; however, 23 this experimental series is unique in terms …
Displaying 1 - 25 of 1415
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