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Topic Area: Chemical Engineering
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Displaying records 11 to 20 of 106 records.
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11. Present Estimates of the Differences Between Thermodynamic Temperatures and the ITS-90
Topic: Chemical Engineering & Processing
Published: 1/29/2011
Authors: Joachim Fischer, M. DePodesta, K. D. Hill, Michael R Moldover, Laurent Pitre, R. Rusby, Peter Steur, Osamu Tamura, R. White, L. Wolber
Abstract: In 2005, the Consultative Committee for Thermometry (CCT) recommended the creation of a Mise en pratique for the definition of the kelvin and envisioned that future versions of the Mise en pratique would recommend values of the differences between ...

12. Microstructure and hydrogen bonding in water-acetonitrile mixtures
Topic: Chemical Engineering & Processing
Published: 11/19/2010
Author: Raymond Dale Mountain
Abstract: The connection between hydrogen bonding between water and acetonitrile in determining the microheterogeneity of the liquid mixture is examined using NPT molecular dynamics simulations. Mixtures for six, rigid, three-site models for acetonitrile and ...

13. The Roles of the Mise en Pratique for the Definition of the Kelvin
Topic: Chemical Engineering & Processing
Published: 10/16/2010
Authors: Dean C Ripple, Richard Davis, Bernd Fellmuth, Joachim Fischer, Graham Machin, Terry Quinn, Peter Steur, Osamu Tamura, D. R White
Abstract: The mise en pratique (,practical realizationŠ) for the definition of the kelvin (MeP-K) was created by the Consultative Committee for Thermometry (CCT) in 2006 to give practitioners of thermometry a guide to the realization of the kelvin, in accord w ...

14. Bilateral Comparison Confirms NIM‰s and NIST‰s Gas Flow Capabilities
Topic: Chemical Engineering & Processing
Published: 10/15/2010
Authors: Aaron N Johnson, CHUNHUI LI
Abstract: The bilateral comparison between NIM and NIST for gas flow was conducted from June 2008 to October 2009. Two critical flow venturis (CFVs) with nominal throat diameters of 10 mm and 20 mm, respectively, were selected as transfer standards. The CFVs w ...

15. Properties for Accurate Gas Flow Measurements
Topic: Chemical Engineering & Processing
Published: 10/15/2010
Author: John D Wright
Abstract: Accurate gas properties are needed to take full advantage of the low uncertainties provided by NIST‰s Gas Flow Calibration Services. If a flowmeter user and NIST use different values for these properties (molecular mass, compressibility, density, vis ...

16. Standard Photoacoustic Spectrometer: Model and Validation using O2 A-Band Spectra
Topic: Chemical Engineering & Processing
Published: 6/30/2010
Authors: Keith A Gillis, Daniel K. Havey, Joseph Terence Hodges
Abstract: We model and measure the absolute response of an intensity-modulated photoacoustic spectrometer comprising a 10 cm long resonator and having a {I}Q{/I}-factor of approximately 30. We present a detailed theoretical analysis of the system and predict ...

17. Using Ab Initio "Data" to Accurately Determine the Fourth Density Virial Coefficient of Helium
Topic: Chemical Engineering & Processing
Published: 6/25/2010
Authors: Michael R Moldover, Mark O McLinden
Abstract: We combine accurate ab initio calculations of the second and third density virial coefficients, B(T) and C(T), of 4He with measurements of its pressure-density-temperature behavior to determine the fourth density viral coefficient D(T). The measureme ...

18. Feasibility of an Accurate Dynamic Standard for Water Flow
Topic: Chemical Engineering & Processing
Published: 6/1/2010
Authors: Iosif I Shinder, Michael R Moldover
Abstract: We used NIST's primary water flow standard to study the feasibility of accurately determining mass flow rates {I}m{/I}^ddot^ of water "dynamically," that is from the time derivative of the weight {I}W{/I} of the collection tank: {I}m{/I ...

19. Computational Analysis of Dynamic SPK(S8)-JP8 Fueled Combustor-Sector Performance
Topic: Chemical Engineering & Processing
Published: 4/9/2010
Authors: R. Ryder, Robert C Hendricks, Marcia L Huber, D. T. Shouse
Abstract: Civil and military flight tests using blends of synthetic and biomass fueling with jet fuel up to 50:50 are currently considered as drop in fuels. They are fully compatible with aircraft performance, emissions and fueling systems, yet the design and ...

20. Thermodynamics of the hydrolysis reactions of 1-naphthyl acetate, 4-nitrophenyl acetate, and 4-nitrophenyl -L-arabinofuranoside
Topic: Chemical Engineering & Processing
Published: 4/2/2010
Authors: Stephen R. Decker, Robert Nathan Goldberg, Brian E Lang, William Michener
Abstract: Microcalorimetry, high-performance liquid chromatography (HPLC), and liquid chromatography-mass spectrometry (LC-MS) have been used to conduct a thermodynamic investigation of the hydrolysis reactions: {1-naphthyl acetate(aq) + H2O(l) = 1 naphthol(a ...

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