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Displaying records 21 to 30 of 828 records.
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21. Modeling the apparent and intrinsic viscoelastic relaxation of hydrating cement paste
Topic: Chemistry
Published: 1/31/2015
Authors: Xiaodan Li, Zachary Grasley, Edward Joseph Garboczi, Jeffrey W Bullard
Abstract: Finite element procedures combined with microstructure development modeling are integrated to quantitatively predict the viscoelastic/viscoplastic relaxation of cement paste due to intrinsic calcium silicate hydrate viscoelasticity and microstructure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913904

22. Investigating Adsorption/Desorption of Carbon Dioxide in Aluminum Compressed Gas Cylinders
Topic: Chemistry
Published: 12/18/2014
Authors: Walter R Miller Jr., George C Rhoderick, Franklin R Guenther
Abstract: Between June 2010 and June 2011, the National Institute of Standards and Technology gravimetrically prepared a suite of 20 carbon dioxide [CO2] in air primary standard mixtures [PSMs]. Ambient mole fraction levels were obtained through six levels of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916263

23. Absolute line intensities for oxirane in the 11.4 micron spectral region.
Topic: Chemistry
Published: 12/15/2014
Authors: Walter Joseph Lafferty, Jean-Marie Flaud, Fridolin Kwabia
Abstract: Absolute individual line intensities of numerous transitions of the fundamental ν15, ν12 and ν5 bands of oxirane (ethylene oxide, cyc-C2H4O) have been measured in the 790-940 cm-1 region using seven high-resolution Fourier transform sp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914445

24. Measurement of the Electrostatic Edge Effect in Wurtzite GaN Nanowires
Topic: Chemistry
Published: 11/24/2014
Authors: Alex Henning, Benjamin Klein, Kristine A Bertness, Paul T Blanchard, Norman A Sanford, Yossi Rosenwaks
Abstract: The electrostatic effect of the hexagonal corner on the electronic structure in wurtzite GaN nanowires (NWs) was directly measured using Kelvin probe force microscopy (KPFM). By correlating electrostatic simulations with the measured potential differ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917310

25. Influence of the central mode and soft phonon on the microwave dielectric loss near the strain-induced ferroelectric phase transitions in Sr^dn+1^uTi^dn^uO^d3n+1^u*
Topic: Chemistry
Published: 11/12/2014
Authors: V. Goian, S. Kamba, D Nuzhnyy, Nathan Orloff, T. Birol, C.-H Lee, D. G. Schlom, James C Booth
Abstract: Recently, Lee et al.^u[1]^dused~1% tensile strain to induce a ferroelectic instability in thin films of Sr^dn+1^uTi^dn^uO^d3n+1^u (n=1-6) phases. They showed that the Curie temperature T^dc^u gradually increased with n, reaching 180 K for Sr7Ti6O19 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916484

26. Loss of H2 and CO from Protonated Aldehydes in Electrospray Ionization Mass Spectrometry
Topic: Chemistry
Published: 9/15/2014
Authors: Pedatsur Neta, Yamil Simon, Yuxue Liang, Stephen E Stein
Abstract: Electrospray ionization mass spectrometry of 3-formylchromones and 3-formylcoumarins shows that collision-induced dissociation of the protonated ions results in elimination of H¬¬2 as a major fragmentation route. This loss of H2 yields an unstabl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913827

27. Degrees of Equivalence for Chemical Measurement Capabilities: Primary pH
Topic: Chemistry
Published: 9/10/2014
Authors: David Lee Duewer, Kenneth W Pratt, Chainarong Cherdchu, Nongluck Tangpaisarnkul2 Nongluck Tangpaisarnkul2, Akiharu Hioki, Masaki Ohata, Petra Spitzer, Michal M?ri?ssy, Leo¿ Vysko¿il
Abstract: The Key Comparison (KC) studies of the Consultative Committee for Amount of Substance ‹ Metrology in Chemistry (CCQM) help ensure the reliability of chemical and biochemical measurements relevant to international trade and environmental , health , an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912010

28. Reference Correlation of the Viscosity of Benzene from the Triple Point to 675 K and up to 300 MPa
Topic: Chemistry
Published: 8/29/2014
Authors: S. Avgeri, Marc J. Assael, Marcia L Huber, Richard A Perkins
Abstract: This paper contains new, representative reference equations for the viscosity of benzene. The equations are based in part upon a body of experimental data that has been critically assessed for internal consistency and for agreement with theory whenev ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916175

29. Membrane protein resistance of oligo(ethylene oxide) self-assembled monolayers
Topic: Chemistry
Published: 7/31/2014
Authors: David J. Vanderah, Marlon L Walker, David Travis Gallagher, Ryan Vierling, Fay Crawshaw
Abstract: Spectroscopic ellipsometry was used to evaluate the resistance to protein adsorption (RPA) of self- assembled monolayers (SAMs) of HS(CH2)3O(CH2CH2O)6M and [HS(CH2)3CH]2O-(CH2CH2O)6M, where M = CH3 or H, on Au. The SAMs were exposed to fibrinogen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913472

30. Metrology for comparison of displacements at the picometer level
Topic: Chemistry
Published: 7/31/2014
Authors: Jack A Stone Jr., Patrick F Egan, Jay H Hendricks, Gregory F Strouse, Douglas A Olson, Jacob E Ricker, Gregory E Scace, Donavon Gerty
Abstract: An apparatus capable of comparing displacements with picometer accuracy is currently being designed at NIST. In principle, we wish to compare one displacement in vacuum to a second, equal displacement in gas, in order to determine gas refractive inde ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914470



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