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1. 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

2. 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

3. Real-World Considerations for Predicting Service Life of Steel-Reinforced Concrete Exposed to Chlorides
Topic: Chemistry
Published: 9/1/2014
Authors: Dale P Bentz, W. Spencer Guthrie, Scott Zachary Jones, Nicos Martys
Abstract: The prediction of concrete service life is of paramount importance for upgrading our nation‰s built infrastructure. Although computer models for predicting the service life of reinforced concrete exposed to chlorides (e.g., road salts) have been deve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915806

4. 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

5. 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

6. 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

7. Surface and Uniaxial Electrical Measurements on Layered Cementitious Composites having Cylindrical and Prismatic Geometries
Topic: Chemistry
Published: 7/24/2014
Authors: Robert Spragg, Scott Zachary Jones, Kenneth Alan Snyder, Dale P Bentz, Chiara Villani, Jason Weiss
Abstract: Electrical measurements are becoming a common method to assess the transport properties of concrete. For a saturated homogenous system, the surface resistance and the uniaxial resistance measurements provide equivalent measures of resistivity once g ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915854

8. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Chemistry
Published: 7/23/2014
Authors: Nathan Daniel Orloff, Jan Obrzut, Christian John Long, Thomas Fung Lam, James C Booth, David R Novotny, James Alexander Liddle, Pavel Kabos
Abstract: The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915011

9. Activation Energies of High-Volume Fly Ash Ternary Blends: Hydration and Setting
Topic: Chemistry
Published: 7/17/2014
Author: Dale P Bentz
Abstract: Because ready-mixed concrete is placed under a wide variety of environmental conditions, the influence of temperature on the hydration reactions and the accompanying setting (hardening) process is of critical importance. While contractors are general ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914612

10. Anticipating the Setting Time of High-Volume Fly Ash Concretes Using Electrical Measurements: Feasibility Studies Using Pastes
Topic: Chemistry
Published: 7/17/2014
Authors: Dale P Bentz, Kenneth Alan Snyder, Amzaray M Ahmed
Abstract: One common concern limiting the proliferation of high-volume fly ash (HVFA) concrete mixtures is the significant delay in setting that is sometimes encountered in field concrete mixtures. While several methods to mitigate the delayed setting times of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914999



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