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Displaying 16676 - 16700 of 73888

Long-term stability of carrier-added Ge-68 standardized solutions

March 1, 2016
Author(s)
Brian E. Zimmerman, Denis E. Bergeron, Ryan P. Fitzgerald, Jeffrey T. Cessna
Tests for chemical stability were carried out on carrier-added 68Ge solutions prepared and calibrated in 2007 and 2011 to evaluate the suitability of the specific composition as a potential Standard Reference Material. Massic count rates of the stored

Low-Ohmic Resistance Comparison: Measurement Capabilities and Resistor Traveling Behavior

March 1, 2016
Author(s)
Marlin E. Kraft, Randolph E. Elmquist, Gert Rietveld, Jan van der Beek, Alessandro Mortara, Beat Jeckelmann
The low-ohmic resistance measurement capabilities of the Van Swinden Laboratorium, National Institute of Standards and Technology, and the Federal Office of Metrology (METAS) were compared using a set of resistors with values 100 mΩ, 10 mΩ, 1 mΩ, and 100

Method Validation and Standards in Hydrogen/Deuterium Exchange Mass Spectrometry

March 1, 2016
Author(s)
Jeffrey W. Hudgens, Richard Y. Huang, Emma D'Ambro
The chapter examines method validation and measurement standards for measuring protein dynamics by hydrogen/deuterium exchange mass spectrometry. Topics examined include the rationale for a reference measurement system for HDX-MS, attaining high accuracy

Multifocus microscopy with precise color multi-phase diffractive optics applied in functional neuronal imaging

March 1, 2016
Author(s)
Sara Abrahamsson, Robert Ilic, Jan Wisniewski, Brian Mehl, Liya Yu, Lei Chen, Marcelo I. Davanco, Laura Oudjedi, Jean Bernard Fiche, Bassam Hajj, Xin Jin, Joan Pulupa, Christine Cho, Mustafa Mir, Mohamed El Beheiry, Xavier Darzacq, Marcelo Nollmann, Maxime Dahan, Carl Wu, Timothee Lionnett, James Alexander Liddle, Cornelia Bargmann
Multifocus microscopy (MFM) allows high-resolution instantaneous three-dimensional (3D) imaging and has been applied to study biological specimens ranging from single molecules inside cell nuclei to entire embryos. In any live microscopy application

Outlook and Challenges for Hydrogen Storage in Nanoporous Materials

March 1, 2016
Author(s)
D. P. Broom, C. J. Webb, K. E. Hurst, P. A. Parilla, T. Gennett, Craig Brown, R. Zacharia, E. Tylianakis, E. Klontzas, G. E. Froudakis, Th. A. Steriotis, P. N. Trikalitis, D. L. Anton, B. Hardy, D. Tamburello, C. Corgnale, B. A. van Hassel, D. Cossement, R. Chahine, M. Hirscher
Considerable progress has been made recently in the use of Nanoporous materials for hydrogen storage. In this article, the current status of the field and future challenges are discussed, ranging from important open fundamental questions, such as the

Perspective: Probing 2-D Magnetic Structures in a 3-D World

March 1, 2016
Author(s)
Alexander J. Grutter
Magnetic interfaces have been identified as promising systems upon which to base next-generation spintronic devices. In these nearly two-dimensional systems, deviations from bulk electronic structure and competition between nearly degenerate magnetic

Quasiparticle-Continuum Level Repulsion in a Quantum Magnet

March 1, 2016
Author(s)
K. W. Plumb, Kyusung Hwang, Yiming Qiu, Leland Harriger, G. E. Granroth, Alexander I. Kolesnikov, G. J. Shu, F. C. Chou, Ch. Ruegg, Yong Baek Kim, Young-June Kim
When the energy eigenvalues of two coupled quantum states approach each other in a certain parameter space, their energy levels repel each other and level crossing is avoided. Such level repulsion, or avoided level crossing, is commonly used to describe

Recommended Protocols for Round Robin Studies in Additive Manufacturing

March 1, 2016
Author(s)
Shawn P. Moylan, Christopher U. Brown, John A. Slotwinski
One way to improve confidence and encourage proliferation of additive manufacturing (AM) technologies and parts is by generating more high quality performance data. Many in the AM community see round robin studies as a way to generate large data sets while

Structural Studies of CaAl 12 O 19 , SrAl 12 O 19 , La 2/3+dAl d12-dO 19 , and CaAl 10 NiTiO 19 with the Hibonite Structure; Indications of an Unusual Type of Ferroelectric

March 1, 2016
Author(s)
Jun Li, Elena A. Medina, Judith K. Stalick, Arthur W. Sleight, M. A. Subramanian
Various oxides with the hibonite structure were synthesized and structurally analyzed using powder neutron diffraction. The structure of CaAl 12O 19 at 298 K and 11 K shows dipoles that are apparently too dilute to order unless subjected to a suitable

THE PROFICIENCY TEST (PILOT) REPORT OF THE GLOBAL MICROBIAL IDENTIFIER INITIATIVE YEAR 2014

March 1, 2016
Author(s)
Nathanael D. Olson, Rene S. Hendriksen, Susanne K. Pedersen, Mette V. Larsen, Jamie N. Pedersen, Oksana Lukjancenko, Rolf S. Kaas, Pimlapas Leekitcharoenphon, Lasse Bergmark, Inge M. Hansen, Vitali Sintchenko, William J. Wolfgang, Henrik T. Westh, Jacob Moran-Gilad, Isabel Cuesta, Angel Zaballos, Brian Beck, Anthony Underwood, Errol Strain, James Pettengill

A Pathway to Optimize the Properties of Magnetocaloric Mn 2-x Fe x P 1-y Ge y ) for Magnetic Refrigeration

February 29, 2016
Author(s)
D. M. Liu, Z. L. Zhang, S. L. Zhou, Qingzhen Huang, X. J. Deng, M. Yue, C. X. Liu, J. X. Zhang, Jeffrey W. Lynn
Magnetocaloric materials can be useful in magnetic refrigeration applications, but to be practical the magnetorefrigerant needs to have a very large magnetocaloric effect (MCE) near room temperature for modest applied fields ( xFe 2-xP 1-yGe y, and we have

Real-time Photoluminescence Studies of Thin Film Formation in Organic Solar Cells

February 29, 2016
Author(s)
Sebastian Engmann, Felicia A. Bokel, Hyun W. Ro, Dean M. DeLongchamp, Lee J. Richter
We present a method to study the structural evolution of organic bulk-heterojunctions via real-time, in-situ, steady state photoluminescence (PL). In-situ PL, in combination with real-time transmission and reflection measurements, allowed us to

Variability and bias assessment in breast ADC measurement across multiple systems

February 29, 2016
Author(s)
Kathryn E. Keenan, Sheye O. Aliu, Lisa J. Wilmes, David C. Newitt, Ella F. Jones, Wen Li, Michael A. Boss, Karl F. Stupic, Stephen E. Russek, Nola M. Hylton
Purpose: To assess the ability of a recent, anatomically designed breast phantom incorporating T 1 and diffusion elements to serve as a quality control device for quantitative comparison of apparent diffusion coefficient (ADC) measurements calculated from

Linkage-Specific Conformational Ensembles of Non-Canonical Polyubiquitin Chains

February 28, 2016
Author(s)
Carlos A. Castaneda, Apurva Chaturvedi, Christina M. Camara, Joseph E. Curtis, Susan T. Krueger, David Fushman
Polyubiquitination is a critical protein post-translational modification involved in a variety of processes in eukaryotic cells. The molecular basis for selective recognition of the polyubiquitin signals by cellular receptors is determined by the
Displaying 16676 - 16700 of 73888
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