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Topic Area: Chemistry

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21. A four-pixel single-photon pulse-position array fabricated from WSi superconducting nanowire single- photon detectors
Topic: Chemistry
Published: 2/3/2014
Authors: Varun Boehm Verma, Robert Daniel Horansky, Francesco Marsili, Jeffrey Stern, Matthew Shaw, Adriana Eleni Lita, Richard P Mirin, Sae Woo Nam
Abstract: We demonstrate a scalable readout scheme for an infrared single-photon pulse-position camera consisting of WSi superconducting nanowire single-photon detectors. For an N {multiply} N array, only 2 {multiply} N wires are required to obtain the pos ...

22. 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 ...

23. Quantitative X-Ray Powder Diffraction Analysis of Portland Cements: Proficiency Testing for Laboratory Assessment
Topic: Chemistry
Published: 2/1/2014
Author: Paul E Stutzman
Abstract: Quantitative x-ray powder diffraction analysis (QXRD) is being used within the cement industry for phase characterization of hydraulic cement. The current ASTM standard test method for powder diffraction analysis of cements provides guidance, but n ...

24. 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 ...

25. Template synthesis of gold nanoparticles with an organic molecular cage
Topic: Chemistry
Published: 1/16/2014
Authors: Ryan McCaffrey, Hai Long, Yinghua Jin, Aric Warner Sanders, Wounjhang Park, Wei Zhang
Abstract: We report a novel strategy for the controlled synthesis of gold nanoparticles (AuNPs) with narrow size distribution (1.9 {plus or minus} 0.4 nm) through NP nucleation and growth inside the cavity of a well-defined three-dimensional, shape-persist ...

26. Development of Standard Reference Materials for Cement-Based Materials
Topic: Chemistry
Published: 1/6/2014
Authors: Chiara F Ferraris, Nicos Martys, William L George
Abstract: Rotational rheometers are routinely used for homogeneous materials, but their usage for characterization of a granular fluid like concrete is a relatively new phenomenon. As measurements with rheometers can involve flow in a complex geometry, it is ...

27. Accelerated and Natural Carbonation of Concretes with Internal Curing and Shrinkage/Viscosity Modifiers
Topic: Chemistry
Published: 1/5/2014
Authors: Alejandro Duran-Herrera, Jose Manuel Mendoza-Rangel, Edgar de los Santos Rodriguez, Francisco Vazquez, P Valdez, Dale P Bentz
Abstract: In many parts of the world, corrosion of reinforcing steel in concrete induced by carbonation of the concrete continues to be a major durability concern. This paper investigates the accelerated and natural carbonation resistance of a set of 7 concret ...

28. 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 ...

29. 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 ...

30. Steering Acoustically Propelled Nanowire Motors towards Cells in a Biologically Compatible Environment using Magnetic Fields
Topic: Chemistry
Published: 12/10/2013
Authors: Suzanne Ahmed, Wei Wang, Lamar O. Mair, Robert D. Fraleigh, Sixing Li, Luz Angelica Castro, Mauricio Hoyos, Tony Jun Huang, Thomas E. Mallouk
Abstract: The recent discovery of fuel-free propulsion of nanomotors using acoustic energy has provided a new avenue for using nanomotors in biocompatible media. Crucial to the application of nanomotors in biosensing and biomedical applications is the ability ...

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