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Displaying 26 - 50 of 570

Development and Validation of a Mechanism for Flame Propagation in R-32/Air Mixtures

March 6, 2018
Author(s)
Donald R. Burgess Jr., Jeffrey A. Manion, Robert R. Burrell, Valeri I. Babushok, Michael Hegetschweiler, Gregory T. Linteris
… A mechanism for the combustion of the refrigerant R-32 (CH2F2) in air mixtures was developed and validated … and Validation of a Mechanism for Flame Propagation in R-32/Air Mixtures …

CONTAM User Guide and Program Documentation Version 3.2

September 4, 2015
Author(s)
William S. Dols, Brian J. Polidoro
… This manual describes the computer program CONTAM version 3.2 developed by NIST. CONTAM is a multizone indoor air … CONTAM User Guide and Program Documentation Version 3.2 …

Vapor and Liquid (p-r-T-x) Measurements of Binary Refrigerant Blends Containing R-32, R-152a, R-227ea, R-1234yf, and R 1234ze(E)

June 14, 2023
Author(s)
Tara Fortin, Mark O. McLinden
… (p-ρ-T-x) data of binary refrigerant mixtures containing R 32 (difluoromethane), R 152a (1,1 difluoroethane), R 227ea … each of the following four binary refrigerant blends: R 32 + R 1234yf, R 32 + R 1234ze(E), R 1234yf + R 152a, and R 1234ze(E) + R … Measurements of Binary Refrigerant Blends Containing R-32, R-152a, R-227ea, R-1234yf, and R 1234ze(E) …

Atom probe tomography for isotopic analysis: development of the 34S/32S system in sulfides

November 12, 2021
Author(s)
Phillip Gopon, James Douglas, Frederick Meisenkothen, Jaspreet Singh, Andrew London, Michael Moody
Using a combination of simulated data and pyrite isotopic reference materials, we have refined a methodology to obtain quantitative δ34S measurements from atom probe tomography (APT) datasets. This study builds on previous attempts to characterize relative

Measurements and Modeling of Spherical CH2F2-Air Flames

July 27, 2020
Author(s)
Michael J. Hegetschweiler, John L. Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory T. Linteris
… The burning velocity of mixtures of the refrigerant R-32 (CH2F2) with air over a range of equivalence ratios are … Flame Speed, Burning Velocity, Refrigerant Flammability, R-32, Radiation, Flame stretch …

High Resolution Infrared Spectra of the N 2 N 3 , N 4 , and 2N 3 Bands of 32 S 16 O 3

December 1, 2001
Author(s)
A G. Maki, Thomas A. Blake, R L. Sams, N Vulpanovici, J Barber, E T. Chrysostom, Tony Masiello, J Nibler, A Weber
… are reported for the infrared spectrum of sulfur trioxide, 32 S 16 O 3 , with resolution ranging from 0.0015 cm -1 to … Infrared Spectra of the N 2 N 3 , N 4 , and 2N 3 Bands of 32 S 16 O 3 …

Optical clock frequency ratios with uncertainty ? 3.2 * 10^-18

January 6, 2026
Author(s)
Alexander Aeppli, Willa Arthur-Dworschack, Kyle Beloy, Caitlin Berry, Tobias Bothwell, Angela Folz, Tara Fortier, Tanner Grogan, Youssef Hassan, Zoey Zimeng Hu, David Hume, Benjamin Hunt, Kyungtae Kim, Amanda Koepke, Dahyeon Lee, David Ray Leibrandt, Ben Lewis, Andrew Ludlow, Mason Marshall, Nicholas Nardelli, Harikesh Ranganath, Daniel Rodriguez Castillo, Jeffrey Sherman, Jacob Siegel, Suzanne Thornton, William Warfield, Jun Ye
… and 87Sr. With total fractional uncertainties at or below 3.2 × 10−18, these measurements meet the milestone criteria … Optical clock frequency ratios with uncertainty ? 3.2 * 10^-18 …

Striking Anharmonic Resonances in N 2 O 4 : Supersonic Jet Fourier Transform Spectra at (13.3, 7.9, 5.7, and 3.2) Mu m

February 1, 2000
Author(s)
M Hepp, R Georges, Martin Herman, J.- M. Flaud, Walter J. Lafferty
… The spectrum of N 2 O 4 has been obtained in the (3.2, 5.7, 7.9, and 13.3) m regions, using a supersonic slit … weaker combination band, υ 1 + υ 9 , was observed in the 3.2 m region: υ o (υ 1 + υ 9 ) = 3125.25987(30) cm -1 . All … Jet Fourier Transform Spectra at (13.3, 7.9, 5.7, and 3.2) Mu m …

Low global-warming-potential refrigerant CH2F2 (R-32): Integration of a radiation heat loss correction method to accurately determine experimental flame speed metrics

August 22, 2020
Author(s)
Gregory Linteris, Raik Hesse, Lukas Berger, Michael Hegetschweiler, Heinz Pitsch, Joachim Beeckmann
… the representative refrigerant difluoromethane (CH2F2, R-32) is easured experimentally in a outwardly propagating … detailed simulations using a recent kinetic model for R-32 are conducted. Flame speed reductions were found to be in … Low global-warming-potential refrigerant CH2F2 (R-32): Integration of a radiation heat loss correction method …

Deriving global OH abundance and atmospheric lifetimes for long-lived gases: A search for the alternative reference gas for CH3CCl3.

November 3, 2017
Author(s)
Qing Liang, Martyn P. Chipperfield, Eric L. Fleming, Luke Abraham, Peter Braesicke, James B. Burkholder, John S. Daniels, Sandip Dhomse, Steven C. Hardiman, Charles H. Jackman, Douglas E. Kinnison, Stephen A. Montzka, Olaf Morgenstern, Archie McCulloch, Paul A. Newman, Vladimir L. Orkin, Giovanni Pitari, Matthew Rigby, Eugene Rozanov, Fiona Tummon, Guus J. Velders, Daniele Visioni
… (gradient-based emissions). Using the combination of HFC-32, HFC-134a, HFC-152a, and HCFC-22 in a gradient-trend-based … OH partial lifetime, GHGs, HFC-32, HFC-134a, HFC-152a, HCFC-22, inter-hemispheric …

NIST Micronutrients Measurement Quality Assurance Program Winter 2010 Comparability Studies: Results for Round Robin LXVII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 32 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
… Vitamins and Carotenoids in Human Serum and 2) Round Robin 32 Total Ascorbic Acid in Human Serum. The materials for both … Vitamins and Carotenoids in Human Serum and Round Robin 32 Ascorbic Acid in Human Serum …
Displaying 26 - 50 of 570
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