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Displaying 3426 - 3450 of 3844

Hexagonal YFe1-xPdxO3-d: Nonperovskite Host Compounds for Pd2+ and Their Catalytic Activity for CO Oxidation

September 25, 2008

Author(s)

Jun Li, Udayshankar G. Singh, Thomas D. Schladt, Judith K. Stalick, Susannah L. Scott, Ram Seshadri

Metastable YFeO3 with the hexagonal YAlO3 structure was obtained by a sol−gel process at 700 °C, using metal nitrate precursors with pH control and the appropriate citric acid to nitrate ratio. Under similar conditions, YFe1−xPdxO3−δ (0 x ≤ 0.1)

Accurate Determination of Electric-Dipole Matrix Elements in K and Rb From Stark Shift Measurements

November 30, 2007

Author(s)

B Arora, M S. Safronova, Charles W. Clark

Stark shifts of potassium and rubidium D1 lines have been measured with high precision by Miller et al [1]. In this work, we combine these measurements with our all-order calculations to determine the values of the electric-dipole matrix elements for the

Effect of Fatigue under Transverse Compressive Stress on Slitted Y-Ba-Cu-O Coated Conductors

June 1, 2007

Author(s)

Najib Cheggour, John (Jack) W. Ekin, C. L. H. Thieme, Y Y. Xie

… substrate (RABiTS), or a Hastalloy-C substrate with an ion-beam assisted deposition (IBAD) buffer template. Samples …

Detection of Trace Water in Phosphine with Cavity Ring-down Spectroscopy

January 1, 2003

Author(s)

Susan Y. Lehman, Kristine A. Bertness, Joseph T. Hodges

… and purified phosphine. We also report secondary ion mass spectrometry (SIMS) measurements of the O …

Effect of Speciation on the Apparent Diffusion Coefficient in Nonreactive Porous Systems

December 1, 2001

Author(s)

Kenneth A. Snyder, J Marchand

A combined theoretical and experimental study is made of the effect that concentration and ionic speciation have on the apparent diffusion coefficient is performed using a nonreactive porous material in a diffusion apparatus. Varying the ionic species

Hydrophobically Modified Dendrimers as Inverse Micelles: Formation of Cylindrical Multidendrimer Nanostructures

September 1, 2001

Author(s)

Franziska Grohn, Barry J. Bauer, Eric J. Amis

Poly(propyleneimine) dendrimers with stearyl end groups are investigated as inverse micelles in toluene. While the initial dendrimers have a spherical structure with a collapsed core, solubilization of metal salt hydrate leads to the formation of

NMR Measurements Related to Clay-Dispersion Quality and Organic-Modifier Stability in Nylon-6/Clay Nanocomposites

June 1, 2001

Author(s)

David L. VanderHart, A Asano, Jeffrey W. Gilman

… (OM), often in the form of a tetrasubstituted ammonium ion. It is shown that proton NMR can be used to identify …

Investigation of Two Broad Features Often Observed in MALDI Mass SPectra of Synthetic Polymers

January 1, 2001

Author(s)

R J. Goldschmidt, Charles M. Guttman

The origins of two broad, unresolved features often observed in MALDI mass spectra of synthetic polymers are investigated. One occurs in the lower mass regions of mass spectra and is due to matrix cluster species. A wide variety of such clusters are

Properties of Nanoporous Silica Thin Films Determined by High-Resolution X-Ray Reflectivity and Small-Angle Neutron Scattering

February 1, 2000

Author(s)

Wen-Li Wu, William E. Wallace, Eric K. Lin, G W. Lynn, Charles J. Glinka, E T. Ryan, H M. Ho

… results film composition was determined by high-energy ion scattering techniques. For the example thin film …

Molecular Structure of Silsesquioxanes Determined by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

November 1, 1998

Author(s)

William E. Wallace, Charles M. Guttman, Joseph M. Antonucci

Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used to deduce the three-dimensional structure of a complex silsesquioxane polymer. Four distinct levels of structure were observed in the mass spectrum. The overall shape of

The Role of Space Charge in Scanned Probe Oxidation

January 1, 1998

Author(s)

John A. Dagata

… probe tip and substrate depends upon reactant and product ion concentrations associated with the water meniscus at the …

The Role of Cu+3 in Oxygen Evolution Activity of Copper-Oxides

May 1, 2025

Author(s)

Pooja Basera, Yang Zhao, Angel Garcia-Esparza, Finn Babbe, Neha Bothra, John Vinson, Dimosthenis Sokaras, Junko Yano, Shannon Boettcher, Michal Bajdich

… the two Cu+3 atoms with onset at ≥1.6 V vs. the reversible hydrogen electrode (RHE), aligning with experimentally …

Carbonation of Alkaline Earth Metal Hydroxides: Structure across Nano- to Mesoscales

March 4, 2025

Author(s)

Hubert King, Ryan Murphy, Avery Baumann, Andrew Allen, Huong Giang Nguyen, Lisa DeBeer-Schmitt, Jan Ilavsky

… macro-porosity. Because neutron scattering is sensitive to hydrogen content, we expected a significant change as M(OH)2 …

Activation loop plasticity and active site coupling in the MAP kinase, ERK2

October 6, 2023

Author(s)

Laurel Pegram, Demian Riccardi, NATALIE AHN

… Previous studies of the protein kinase, ERK2, using NMR and hydrogen-exchange measurements have shown changes in dynamics …

Supplementing rigorous electromagnetic modeling with atomistic simulations for optics-based metrology

June 21, 2019

Author(s)

Bryan M. Barnes, Hui Zhou, Richard M. Silver, Mark Alexander Henn

… theory (DFT) calculations for an ultrathin film, Si with hydrogen-terminated Si(111) surfaces. Kohn-Sham wavefunctions …

Neutron Radiography Measurement of Salt Solution Absorption in Mortar

February 1, 2017

Author(s)

Catherine Lucero, Robert Spragg, Dale P. Bentz, Daniel S. Hussey, David L. Jacobson, Jason Weiss

… atoms and are therefore sensitive to light atoms such as hydrogen. This makes neutron imaging ideal for measuring …

Computational Characterization of Competing Energy and Electron Transfer States in Bimetallic Donor- Acceptor Systems for Photocatalytic Conversion

September 13, 2016

Author(s)

Lisa A. Fredin, Petter Persson

… systems for direct solar fuel production, such as hydrogen generation from water splitting through so-called …

Critical Examination of the Colloidal Particle Model of Globular Proteins

February 3, 2015

Author(s)

Prasad S. Sarangapani, Steven D Hudson, Ronald L. Jones, Jack F. Douglas, Jai A. Pathak

… within the protein chain can overcome the attractive hydrogen bonding interactions holding it in its native …

Extent and Impacts of Hydrocarbon Fuel Compositional Variability for Aerospace Propulsion Systems

July 25, 2010

Author(s)

Thomas J. Bruno, Tim Edwards, Linda M. Shafer, Matthew Billingsley

… curve, density, viscosity, heat of combustion, and hydrogen content. While chemical variability for RP-1 was not …

Tertiary Structure Changes in Albumin Upon Surface Adsorption Observed Via Infrared Spectroscopy

March 10, 2009

Author(s)

Jack R. Smith, Marcus T. Cicerone, Curtis W. Meuse

… band intensity. This intensity gives the extent of amide hydrogen-deuterium exchange (HDX) which is directly related …

Solid State NMR Investigation of Photoresist Molecular Glasses Including Mixing Behavior With a Photoacid Generator

March 5, 2009

Author(s)

David L. VanderHart, Vivek M. Prabhu, Anuja De Silva, Nelson Felix, Christopher K. Ober

… by crystallization. It is also noted that very strong hydrogen bonds exist in three of the four underivatized …

A Systematically-Generated, Pressure-Dependent Mechanism for High-Conversion Ethane Pyrolysis. Part II: Radical Disproportionations, Missing Reaction Families, and the Consequences of Pressure-Dependence

October 16, 2008

Author(s)

D M. Matheu, J M. Grenda

… diffusion could cause the systematic underprediction of hydrogen concentration at longer residence times. Finally, …

The Realization of the SI Second and Generation of UTC(NIST) at the Time and Frequency Division of the National Institute of Standards and Technology (NIST)

August 2, 2007

Author(s)

Thomas P. Heavner, Steven R. Jefferts

… is also a continuously operating timescale, comprised of 5 hydrogen masers and several commercial Cesium beam atomic …

Self-Assembly, Molecular Ordering, and Charge Mobility in Solution-Processed Ultrathin Oligothiophene Films

November 29, 2005

Author(s)

A R. Murphy, Paul C. Chang, Priscilla VanDyke, J Liu, J M. Frechet, V Subramanian, Dean DeLongchamp, S Sambasivan, Daniel A. Fischer, Eric K. Lin

… also prepared to evaluate the effect of the presence of hydrogen-bonding moieties. The charge transport properties …

Micro-Differential Scanning Calorimeter for Combustible Gas Sensing

January 1, 2004

Author(s)

Richard E. Cavicchi, G Poirier, N H. Tea, Muhammad Y. Afridi, David W. Berning, Allen R. Hefner Jr., John S. Suehle, Michael Gaitan, Stephen Semancik, Christopher B. Montgomery

… concentrations of methanol, ethanol, acetone, benzene, and hydrogen in air, when operated with periodic ramps to 570 C …

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