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Displaying records 21 to 30 of 795 records.
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21. Recent advances in vacuum sciences and applications
Topic: Chemistry
Published: 4/9/2014
Authors: Miran Mozetic, Kostya Ostrikov, David Ruzic, Davide Curreli, Uros Cvelbar, Alenka Vesel, Gregor Primc, Manfred Leisch, Karl Jousten, Oleg Malyshev, Jay H Hendricks, laszlo Kover, Alberto Tagliaferro, O Conde, Antonio Silvestre, J Giapintzakis, M Buljan, N Radi?, G Dra?i?, S Bernstorff, H Biederman, O Kyli?n, J Hanu?, S Milo?evi?, A Galtayries, P Dietrich, W Unger, K Stana-Kleinschek, A Drmota?Petri?, J J Pireaux, J W Rogers, M Anderle, M Lehocky, V Sedlarik
Abstract: Recent advances in vacuum sciences and applications are reviewed. Novel optical interferometer cavity devices enable pressure measurements with ppm accuracy. Innovative dynamic vacuum standard allows for pressure measurements with temporal resolution ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914906

22. Characterization of Emerging Ambient Pressure Mass Spectrometric Techniques using Time-of-Flight Secondary Ion Mass Spectrometry
Topic: Chemistry
Published: 3/28/2014
Authors: Shinichiro Muramoto, Thomas P Forbes, Matthew E Staymates, John G Gillen
Abstract: Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used to characterize the desorption performance of two emerging ambient ionization mass spectrometry (MS) sources; desorption electrospray ionization (DESI) and low temperature plasma (LTP ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915103

23. Comparison of independently calculated ab-initio normal-mode displacements for the three C-H stretching vibrations of methanol along the internal rotation path
Topic: Chemistry
Published: 3/19/2014
Authors: Li-Hong Xu, Ronald M. Lees, Jon Torger Hougen, Joel M. Bowman, Xinchuan Huang, Stuart Carter
Abstract: Comparison of graphical displays of normal-mode coefficients from recent quantum chemical projected-frequency calculations with analogous displays constructed after reexamination of results from more extensive higher-level calculations described earl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915278

24. Certification of Total Arsenic in Blood and Urine Standard Reference Materials by Radiochemical Neutron Activation Analysis and Inductively Coupled Plasma Mass Spectrometry
Topic: Chemistry
Published: 3/1/2014
Authors: Rick L Paul, William C Davis, Karen E Murphy, Colleen E Bryan, Lee Lijian Yu, William F Guthrie, Dennis D Leber, Thomas W Vetter
Abstract: A newly developed procedure for determination of arsenic by radiochemical neutron activation analysis was used to measure arsenic in SRM 955c Toxic Elements in Caprine Blood and SRM 2668 Toxic Elements in Frozen Human Urine for the purpose of providi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909821

25. Effect of wire configuration and point defects on the conductance of gold nano-conductors
Topic: Chemistry
Published: 2/28/2014
Authors: Shmuel Barzilai, Francesca M Tavazza, Lyle E Levine
Abstract: Gold nanowire (NW) chains are considered a good candidate for nanoelectronics devices because they exhibit remarkable structural and electrical properties. One promising nano-conductor candidate is called ,Hexa1Š. This NW configuration was found to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913936

26. Filter Material Effects on Particle Absorption Characteristics
Topic: Chemistry
Published: 2/10/2014
Authors: Cary Presser, Joseph M Conny, Ashot Nazarian
Abstract: The absorption coefficient and mass specific absorption cross section were determined for nigrosin-laden quartz, Teflon, and polycarbonate filters in inert surroundings at different steady-state temperatures and particle mass loadings. The objective ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912531

27. A comparison of literature models for the oxidation of normal heptane
Topic: Chemistry
Published: 2/1/2014
Authors: David A Sheen, Wing Tsang
Abstract: The development of detailed chemical kinetic models has proceeded unabated since the pioneering work of Dixon-Lewis and coworkers forty-five years ago. In that time, computational power has increased ten million-fold, and yet, we do not have a conse ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912741

28. Hybrid-Phospholipid Bilayer Coatings for Separations of Cationic Proteins in Capillary Zone Electrophoresis
Topic: Chemistry
Published: 1/20/2014
Authors: Elyssia S. Gallagher, Seid M Adem, Leonard K. Bright, Elisabeth Mansfield, Craig A. Aspinwall
Abstract: Separations of proteins and peptides in capillary zone electrophoresis suffer from non-specific adsorption of the analytes to the capillary surface. Semi-permanent phospholipid bilayers have been used to minimize adsorption, but must be regenerated ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914121

29. Probing the intracellular glutathione redox potential using in-cell NMR spectroscopy
Topic: Chemistry
Published: 1/2/2014
Authors: Steve Y. Rhieu, Aaron A Urbas, Daniel W Bearden, John P Marino, Vytautas Reipa, Katrice A Lippa
Abstract: Non-invasive and real-time analysis of cellular redox processes has been greatly hampered by lack of suitable measurement techniques. Here we describe an in-cell nuclear magnetic resonance (NMR)-based method for measuring the intracellular glutathion ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914505

30. Nondestructive Testing (NDT) and Sensor Technology for Service Life Modeling of New and Existing Concrete Structures
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7974
Topic: Chemistry
Published: 12/18/2013
Authors: Kenneth Alan Snyder, Li Piin Sung, Geraldine S Cheok
Abstract: Nondestructive test (NDT) methods and sensor technologies are evaluated in the context of providing input parameters to service life prediction models for reinforced concrete structures. Relevant NDT methods and sensors are identified that are based ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914232



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