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Displaying 23651 - 23675 of 74024

Assessment of Factors Affecting Fire Performance of Mattresses: A Review

March 20, 2012
Author(s)
Shonali Nazare, Rick D. Davis
An in-depth analysis of U.S. residential fire statistics shows that although the total number of fires and deaths due to mattress fires has dropped as a result of several regulatory approaches, the number of deaths per 1000 mattress/bedding fires has

Enhanced carrier transport along edges of graphene devices

March 20, 2012
Author(s)
Jungseok Chae, Suyong S. Jung, Sungjong Woo, Hongwoo Baek, Jeonghoon Ha, Young J. Song, Young-Woo Son, Nikolai Zhitenev, Joseph A. Stroscio, Young Kuk
The relation between the macroscopic charge transport properties and the microscopic carrier distribution inside conducting channels is one of the central issues in physics and future applications of graphene devices (GDs). With scanning gate microscopy

Optimization of Spin-triplet Supercurrent in Ferromagnetic Josephson Junctions

March 20, 2012
Author(s)
Benjamin James McMorran, Theresa Ginley, Julie Borchers, Brian Kirby, Brian B. Maranville, John Unguris
In the past year, several groups have observed evidence for long-range spin-triplet, supercurrent in Josephson junctions containing ferromagnetic (F) materials. In our work, the spin-triplet pair correlations are created by non-collinear magnetizations

Unconventional structure-assisted optical manipulation of high-index nanowires in liquid crystals

March 20, 2012
Author(s)
Kristine A. Bertness, David Engstrom, Michael C. Varney, Martin Persson, Rahul P. Trivedi, Mattias Goksor, Ivan I. Smalyukh
Stable optical trapping and manipulation of high-index particles in low-index host media is often impossible due to the dominance of scattering forces over gradient forces. Here we explore optical manipulation in liquid crystalline structured hosts and

A Case Study on the Impact of Local Material Chemistry on the Mechanical Reliability of Packaged Integrated Circuits: Correlation of the Packaging Fallout to the Chemistry of Passivation Dielectrics in an Al-Cu System

March 19, 2012
Author(s)
Chukwudi A. Okoro, Yaw S. Obeng
In this paper, we use a variety of analytical techniques to examine the impact of local chemistry, and the mechanical properties, of the encapsulation dielectric films on the post-packaging device rejection rate of integrated circuit devices. A strong

Calibrations of Multi-Hole Pitot Tubes Depend on Tubulence

March 19, 2012
Author(s)
Iosif I. Shinder, Christopher J. Crowley, Michael R. Moldover
NIST is developing techniques to calibrate 2- and 3-dimensional anemometer systems (such as multi-hole pitot tubes) with a resolution of 0.3 %. The pitch and yaw response of multi-hole pitot tubes is complicated; therefore, calibrations require hundreds of

Comparison of laser-based and monochromator-based thermodynamic temperature measurements

March 19, 2012
Author(s)
George P. Eppeldauer, Howard W. Yoon, Jorge E. Neira, Vladimir Khromchenko, Charles E. Gibson, Allan W. Smith
In this work, we describe the comparisons between the laser-based and monochromator-based radiance responsivity calibrations of a radiation thermometer. The spectral selection of the radiation thermometer is performed using a photopic-response filter which

Stability of Solid-Supported Enzyme Catalysts for Ring-Opening Polymerization

March 19, 2012
Author(s)
Sara V. Orski, Santanu S. Kundu, Kathryn L. Beers, Richard Gross
The enzyme Candida antarctica Lipase B (CAL B), immobilized on a crosslinked poly(methyl methacrylate) (PMMA) support, catalyzes the ring-opening polymerization of ε-caprolactone to make biodegradable polyesters. Weak hydrophobic interactions of CAL B

The immunotoxicity of perfluorinated compounds: Recent developments

March 19, 2012
Author(s)
Jennifer M. Lynch, Jamie DeWitt, M.M. Peden-Adams, Dori Germolec
Perfluorinated compounds (PFCs) are environmentally widespread, persistent, and bioaccumulative chemicals with multiple toxicities reported in experimental models and wildlife, including immunomodulation. The two most commonly detected compounds, which

Extending transmission crystal x-ray spectroscopy to moderate-intensity laser driven sources

March 17, 2012
Author(s)
Lawrence T. Hudson, J. Y. Mao, L. M. Chen, John F. Seely, L. Zhang, Y. Q. Sun, X. X. Lin, J. Zhang
We present spectroscopic measurements of characteristic Kα and Kβ emissions from Mo targets irradiated by a 100 fs, 200 mJ, Ti: sapphire laser with intensity of 1017 W/cm2 to 1018 W/cm2 per pulse. This research pursues novel x-ray sources for medical

Selected Procedures for Volumetric Calibrations

March 16, 2012
Author(s)
Georgia L. Harris
This NIST IR of Selected Publications has been compiled as an interim update for a number of Good Laboratory Practices, Good Measurement Practices, and Standard Operating Procedures for Volume Calibrations. These procedures are updates to procedures that

Carbohydrate-Functionalized Surfactant Vesicles for Controlling Glycan Density

March 15, 2012
Author(s)
Monique A. Makos, Rebecca A. Zangmeister
We report on the development of a method for rapidly characterizing the glycan binding properties of lectins. Catanionic surfactant vesicles were prepared that spontaneously formed in water and remained stable at room temperature for months. By varying the

Environmental Metabolomics

March 15, 2012
Author(s)
Daniel W. Bearden
The application of metabolomics in the field of environmental science or ecology, which has developed based substantially on NMR spectroscopic approaches, is a fast paced, rapidly developing field which seems to be poised to help re-frame the discussion of

Coherent Dynamics of meta-Toluidine Investigated by QuasiElastic Neutron Scattering

March 14, 2012
Author(s)
Antonio Faraone, Kunlun Hong, Larry Kneller, Michael Ohl, John R. Copley
The coherent dynamics of a typical fragil glass former, meta-toluidine, was investigated at the molecular level using QuasiElastic Neutron Scattering, with Time-of-Flight and Neutron Spin Echo spectrometers. It is well known that the static structure

Tumor Necrosis Factor Interaction with Gold Nanoparticles

March 14, 2012
Author(s)
De-Hao D. Tsai, Sherrie R. Elzey, Frank W. DelRio, Robert I. MacCuspie, Suvajyoti S. Guha, Michael R. Zachariah, Athena M. Keene, Jeffrey D. Clogston, Vincent A. Hackley
We report on a systematic investigation of molecular conjugation of tumor necrosis factor protein-α (TNF) onto gold nanoparticles (AuNPs) and the subsequent binding behavior to its antibody (anti-TNF). We employ a combination of physical and spectroscopic
Displaying 23651 - 23675 of 74024
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