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Displaying 2451 - 2475 of 2522

Structure and Vibrational Dynamics of the Halogen-Substituted Butynes HC Equivalent to CCH 2 CH 2 X (X=F,Cl,Br) from Molecular-Beam High-Resolution Microwave and Infrared Spectroscopy

March 1, 2003
Author(s)
J C. Keske, F S. Rees, R D. Suenram, Brooks H. Pate
The pure rotational and high-resolution acetylenic C-H stretch rovibrational spectra of a series of substituted butynes, HC=CCH 2CH 2X (X=F,Cl,Br), are reported. For each of the molecules the pure rotational spectrum of two conformational isomers (trans

Formation of Macropores in Calcium Phosphate Cement Implants

February 1, 2001
Author(s)
Shozo Takagi, Laurence C. Chow
… ). After hardening, the specimens were placed in water for 20 h at about 60 C to completely dissolve the additive … n = 6) expressed as volume fraction in % were 0, 18.9 1.7, 26.9 1,6m 38,3 4.4 and 50.3 2.7 for the expressed as volume fraction in % were 0, 18.9 1.7, …

Effect of Mixing Ratio and pH on the Reaction Between Ca 4 (PO 4 ) 2 O and CaHPO 4

May 1, 2000
Author(s)
S Matsuya, Shozo Takagi, Laurence Chow
… in 12.5 mL of 0.15 mol/L KCl solution, at initial pH about 7, and the pH was allowed to drift for 24 h. Results show … with TTCP/DCPA of < 0.67, the pHs were between 5.3 and 7. The slurries with TTCP/DCPA molar ratios between 0.5 and 1 … 2g of an equimolar TTCP and DCPA mixture was placed in 20 mL of 0.15 mol/L KCl solution. The pH values were kept …

Thermodynamics of Reactions Catalyzed by Anthranilate Synthase

February 14, 2000
Author(s)
W M. Byrnes, Robert N. Goldberg, Marcia J. Holden, M P. Mayhew, Yadu D. Tewari
… the overall reaction at a temperature of 298.15 K and pH = 7.79. Equilibrium measurements were performed on the first … ranging from 288.15 to 302.65 K, and at pH values from 7.76 to 8.08. The results of the equilibrium and calorimetric … 2- (aq) + NH + 4 (aq) = ADIC - (aq) + H 2 O(l), K = (20.3 4.5) and δ r H = m = (7.5 0.6) kJ mol -1 . Thermodynamic …

New NIST-Certified Length Microscale

January 1, 1996
Author(s)
James E. Potzick
… is better than 50 nm for lot-calibrated units, and 5 to 20 nm for individually calibrated units. Calibrations will be …

Disposition of Fluorine on New Firefighter Turnout Gear: Implications for Occupational Exposure

December 27, 2021
Author(s)
Derek Muensterman, Ivan Titaley, Graham Peaslee, Leah Minc, Liliana Cahuas, Alix Rodowa, Yuki Horiuchi, Shogo Yamane, Thierry Fouquet, John Kissel, Courtney Carignan, Jennifer Field
… made up only a small fraction of total fluorine (0.0016–6.7%). Moisture barrier layers comprised a PTFE film, as … individual nonvolatile (0.159 mg F/kg) and volatile PFAS (20.7 mg F/kg) as well as total fluorine (122,000 mg F/kg) …

Low-Field Magnetic Resonance Imaging of Roots in Intact Clayey and Silty Soils

July 1, 2020
Author(s)
George Bagnall, Cristine` Morgan, Matthew Rosen, Mark Conradi, Stephen Altobelli, Dean Kuethe, Haly Neely, Neha Koonjoo, Bo Zhu, Karl Stupic, John Mullet, Brock Weers, Eiichi Fukushima, William Rooney
The development of a robust method to non-invasively visualize root morphology in natural soils has been hampered by the opaque, physical, and structural properties of soils. In this work we describe a novel technology, low field magnetic resonance imaging

Sequence-based U.S. population data for 27 autosomal STR loci

July 19, 2018
Author(s)
Katherine Gettings, Lisa Borsuk, Carolyn R. Steffen, Kevin M. Kiesler, Peter Vallone
This manuscript reports STR sequence-based allele frequencies for the "NIST 1036" sample set across 27 autosomal STR loci: D1S1656, TPOX, D2S441, D2S1338, D3S1358, D4S2408, FGA, D5S818, CSF1PO, D6S1043, D7S820, D8S1179, D9S1122, D10S1248, TH01, vWA

JY1 Time Scale: a New Kalman-Filter Time Scale Designed at NIST

October 17, 2017
Author(s)
Jian Yao, Thomas E. Parker, Judah Levine
We report on a new Kalman-filter Hydrogen-maser time scale (i.e., JY1 time scale) designed at NIST. The JY1 time scale is composed of a few Hydrogen masers and a Cs clock. The Cs clock is used as a reference clock, to ease operations with existing data

The development of a new Kalman-filter time scale at NIST

January 31, 2017
Author(s)
Jian Yao, Thomas E. Parker, Judah Levine
We report on a preliminary design of a new Kalman-filter Hydrogen-maser time scale at NIST. The time scale is composed of a few Hydrogen masers and a Cs clock. The Cs clock is used as a reference clock, just for easy operations with the existing data. All

Analytical Advances in the SEM

January 1, 2003
Author(s)
J H. Scott
… are required to cover the usual spectral range of 0-20 keV. This makes qualitative analysis with the WDS tedious …
Displaying 2451 - 2475 of 2522
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