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Displaying records 1 to 10 of 829 records.
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1. Towards a dynamic pressure standard based on laser absorption spectroscopy
Topic: Chemistry
Published: 5/20/2016
Authors: Kevin O Douglass, Douglas A Olson
Abstract: We describe an approach for creating a cost-effective, field deployable dynamic pressure standard based on measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we pl ...

2. Speed of Sound Measurements in (Argon + Carbon Dioxide) over the Temperature Range from (275 to 500) K at Pressures up to 8 MPa
Topic: Chemistry
Published: 3/23/2016
Authors: Mark O McLinden, Richard A Perkins, Robin Wegge, Markus Richter, Roland Span
Abstract: The speed of sound of two (argon + carbon dioxide) mixtures was measured over the temperature range from (275 to 500) K with pressures up to 8 MPa utilizing a spherical acoustic resonator. The compositions of the gravimetrically prepared mixtures wer ...

3. Thermodynamic Properties of Polycyclic Aromatic Hydrocarbons
Series: Special Publication (NIST SP)
Report Number: 1186
Topic: Chemistry
Published: 12/16/2015
Authors: Thomas C Allison, Donald R Burgess Jr.
Abstract: Polycyclic aromatic hydrocarbons (PAHs) are molecules that exist on earth due to natural and man-made causes. They are a significant health concern as many PAH compounds are known to be carcinogenic. PAHs are generally thermodynamically stable ...

4. First far-infrared high resolution analysis of the nu6 band of phosgene 35Cl2CO and 35Cl37CLCO
Topic: Chemistry
Published: 11/2/2015
Author: Walter Joseph Lafferty
Abstract: A Fourier transform spectrum of phosgene (Cl2CO) has been recorded in the 22.5 μm spectral region at a resolution of 0.00102 cm-1 using a Bruker IFS125HR spectrometer coupled with synchrotron radiation leading to the observation of the ν ...

5. Thermal Signature Measurements for Ammonium Nitrate/Fuel Mixtures by Laser Heating
Topic: Chemistry
Published: 11/1/2015
Author: Cary Presser
Abstract: Measurements were carried out to obtain thermal signatures of several ammonium nitrate/fuel (ANF) mixtures, using a laser-heating technique referred to as the laser-driven thermal reactor (LDTR). The mixtures were ammonium nitrate (AN)/kerosene, AN/ ...

6. Reparameterization of COSMO-SAC for Phase Equilibrium Properties Based on Critically Evaluated Data
Topic: Chemistry
Published: 9/25/2015
Authors: Yauheni Paulechka, Vladimir Diky, Andrei F Kazakov, Kenneth G Kroenlein, Michael D. Frenkel
Abstract: COSMO-SAC model was re-parameterized using the critically evaluated data generated by the NIST ThermoData Engine for vapor-liquid equilibria, excess enthalpies for binary mixtures, and activity coefficients of components of binary mixtures. The c ...

7. Time-resolved terahertz spectroscopy (TRTS) of electrically conductive metal-organic frameworks (MOFs) doped with redox active species
Topic: Chemistry
Published: 9/24/2015
Authors: Brian G. Alberding, Edwin J Heilweil
Abstract: Metal-Organic Frameworks (MOFs) are three-dimensional coordination polymers that are well known for large pore surface area and their ability to adsorb molecules from both the gaseous and solution phases. In general, MOFs are electrically insulating, ...

8. The ABCs of Using Standard Reference Materials in the Analysis of Foods and Dietary Supplements: A Practical Guide
Series: Special Publication (NIST SP)
Report Number: sp260-181rev1
Topic: Chemistry
Published: 9/16/2015
Authors: Katherine E Sharpless, David Lee Duewer, Katrice A Lippa, Andrew L Rukhin
Abstract: Although "nutraceuticals" and "functional foods" seem to be ill-defined terms, both are often used to indicate a food that contains compounds providing benefits beyond basic nutrition, often with the expectation that these compounds are protective ag ...

9. Spherical Resonator for Vapor-Phase Speed of Sound and Measurements of 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane (RE347mcc) and trans-1,3,3,3-tetrafluoropropene [R1234ze(E)]
Topic: Chemistry
Published: 7/14/2015
Authors: Richard A Perkins, Mark O McLinden
Abstract: We describe an apparatus to measure the speed of sound of gas samples at temperatures from 265 K to 500 K with pressures up to 40 MPa. The speed of sound is determined from the frequency of the three lowest-order radial resonance modes for the gas in ...

10. Best Practices for Evaluating Single Nucleotide Variant Calling Methods for Microbial Genomics
Topic: Chemistry
Published: 7/7/2015
Authors: Nathanael D Olson, Steven P Lund, Rebecca Colman, Jeffery T. Foster, Jason W. Sahl, James M. Schupp, Paul Keim, Jayne B Morrow, Marc L Salit, Justin M Zook
Abstract: Innovations in sequencing technologies have allowed biologists to make incredible advances in understanding biological systems. As experience grows, researchers increasingly recognize that analyzing the wealth of data provided by these new sequen ...

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