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NIST Authors in Bold

Displaying 51 - 75 of 3839

Neutron Imaging Studies of Metal-Hydride Storage Beds

December 1, 2010
Author(s)
David Jacobson, Daniel Hussey, Elias Baltic, Terrence J. Udovic, John J. Rush, Robert C. Bowman
… transient and steady-state distributions, respectively, of hydrogen within a prototypical, LaNi4.78Sn0.22-based hydrogen storage bed during and after various absorption and … steps. It was shown that using deuterium instead of hydrogen enabled the imaging of thicker beds. These …

Ionic Hydrogen bond Networks and Ion Solvation 1. An Efficient Monte Carlo / Quantum Mechanical Method for Structural Search and Energy Computation: Ammonium / Water

February 25, 2009
Author(s)
Yi-Lei Zhao, Michael Mautner, Carlos A. Gonzalez
… Hydrogen bond networks about solvated ions can form many … we compute the stepwise hydration energy of the ammonium ion in NH4 +(H2O)n clusters (n = 1-8), for which experimental … this work should be useful for simulating relatively large ion/solvent systems. … Hydrogen bond, ammonium, water, tight-binding theory …

Extensive hydrogen incorporation is not necessary for superconductivity in topotactically reduced nickelates

August 27, 2024
Author(s)
Purnima P. Balakrishnan, Dan F. Segedin, Lin E. Chow, P. Quarterman, Shinichiro N. Muramoto, Mythili Surendran, Ranjan K. Patel, Harrison LaBollita, Grace A. Pan, Qi Song, Yang Zhang, Ismail El Baggari, Koushik Jagadish, Yu-Tsun Shao, Berit H. Goodge, Lena F. Kourkoutis, Srimanta Middey, Antia S. Botana, Jayakanth Ravichandran, A. Ariando, Julia Mundy, Alexander Grutter
… layered superconducting nickelate films is the role that hydrogen incorporation into the lattice plays in the … have introduced the possibility that the incorporation of hydrogen from the reducing agent into the nickelate lattice … (Nd,Sr)NiO2 / SrTiO3. We find no evidence for extensive hydrogen incorporation across a broad range of samples, …

Adsorption From Solutions on Synthetic Hydroxyapatite: Nonaqueous Versus Aqueous Solvents

July 1, 1999
Author(s)
D N. Misra
… on hydroxapatite is mainly regulated by the interplay of hydrogen bonding between adsorbate, adsorbent, and solvent. … the chemisorbed and physisorbed water. This interplay of hydrogen bonding in conjunction with chemical and structural … of solutes from aqueous solutions generally involves ion-exchange with the apatite surface, and may be affected by …

Hydrogen embrittlement in ferritic steels

October 6, 2020
Author(s)
May L. Martin, Matthew J. Connolly, Frank W. DelRio, Andrew J. Slifka
… The deleterious effects of hydrogen on the physical properties of metals have been known … there are still significant questions related to the “hydrogen embrittlement” of ferritic steels due to … steels coupled with the global difficulties with gauging hydrogen content in all materials. However, recent …

Advances in Weld Hydrogen Sensors

June 1, 2002
Author(s)
David Olson, B. Mishra, R D. Smith, S. Niyomsoan, P. Termsuksawad, Y D. Park, V I. Kaydanov, Z Gavra, Ronald B. Goldfarb
… the application of modern physics concepts, advanced hydrogen sensors are being developed for rapid determination of weld hydrogen content and distribution. Electronic, optical, and … have demonstrated the ability to measure and monitor the hydrogen content in alloys. These advanced electronic-based …

LiBH 4 &#8226NH 3 BH 3 : A New Lithium Borohydride Ammonia Borane Compound with a Novel Structure and Favorable Hydrogen Storage Properties

July 1, 2012
Author(s)
Junhong Luo, Hui Wu, Wei Zhou, Xiangdong Kang, Zhanzhao Fang, Ping Wang
… heating to 450°C, totally yielding approximately}15.7 wt% hydrogen. In comparison with the LiBH6d4^ component phase, … International Journal of Hydrogen Energy … hydrogen storage, dehydrogenation, crystal structure, ammonia … Borane Compound with a Novel Structure and Favorable Hydrogen Storage Properties …

Current status of transport properties of hydrogen

August 21, 2007
Author(s)
Jacob W. Leachman, Bryce Jacobson, Steven Penoncello, Marcia L. Huber
… This paper contains an analysis of transport properties of hydrogen, particularly thermal conductivity and viscosity, … the current standard transport property models for normal hydrogen and parahydrogen, which are based on measurement and … the current transport property standards for both normal hydrogen and parahydrogen are included in the comparisons. …

Hydrogen-Induced Cracking and Blistering in Steels: A Review

March 31, 2022
Author(s)
May Ling Martin, Petros Sofronis
… understanding of the corrosion phenomenon known as Hydrogen-Induced Cracking (HIC). HIC is defined as cracking … where cracking is driven by the precipitation of gaseous hydrogen molecules within the crack, which typically occurs … phenomenon, encompassing a surface reaction for hydrogen uptake, hydrogen diffusion to vulnerable …

Testing the Performance of Hydrogen Sensors

September 8, 2009
Author(s)
Nathan D. Marsh, Thomas G. Cleary
… The acceptance of hydrogen as a widely-available energy source will depend to … on the perceived and actual safe dispensing and storage of hydrogen by the general public. Reliable detection of an accidental hydrogen gas release and mitigation of the hazard through …

Method Validation and Standards in Hydrogen/Deuterium Exchange Mass Spectrometry

March 1, 2016
Author(s)
Jeffrey W. Hudgens, Richard Y. Huang, Emma D'Ambro
… measurement standards for measuring protein dynamics by hydrogen/deuterium exchange mass spectrometry. Topics … Hydrogen-Deuterium Exchange Mass Spectrometry: Fundamentals, … Hydrogen/Deuterium Exchange, Mass Spectrometry, Method … Method Validation and Standards in Hydrogen/Deuterium Exchange Mass Spectrometry …

Practical Use and Calculation of CCT and Duv

October 18, 2013
Author(s)
Yoshihiro Ohno
The Correlated Color Temperature (CCT) is often used to represent chromaticity of white light sources, but chromaticity is two-dimensional, and another dimension, the distance from the Planckian locus, is often missing. Duv is defined in ANSI C78.377 for

Current Status of Thermodynamic Properties of Hydrogen

August 17, 2007
Author(s)
Bryce Jacobson, Jacob W. Leachman, Steven Penoncello, Eric Lemmon
… a survey of the thermodynamic properties of normal hydrogen and parahydrogen with comparisons of properties … accepted standards for the thermodynamic properties of hydrogen were based on experimental and correlation work … the completion of the current standards for both normal hydrogen and parahydrogen are included in the comparisons. …

Stresses in Ion Exchange Layers of Soda-Lime-Silicate Glass

June 1, 2005
Author(s)
Theo Fett, J -. Guin, Sheldon M. Wiederhorn
… stresses that develop as a consequence of sodium/hydrogen ion exchange in soda-lime-silicate glass immersed in water. … of the stress is consistent with earlier findings that the ion-exchange process involves hydronium ions (H 3 O +) and … corrosion, fracture, fracture mechanics, glass, ion exchange …

Pilot Study on Daytime Color Appearance of Retroreflective Sheeting

July 11, 2007
Author(s)
Wendy L. Davis, Carl C. Miller, Jason Kennedy, Carl Andersen
In this experiment, reference instrument measurements of the chromaticity of retroreflective materials were compared with human visual perceptions of their colors under daytime conditions. A hue scaling method was used to measure perceived color. Four

Experiment at NIST towards one-electron ions in circular Rydberg states

June 20, 2011
Author(s)
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
… at NIST to enable tests of theory with oneelectron ions synthesized in circular Rydberg states from captured … highly charged ions, ion trapping, hydrogen-like ions, fundamental constants, Rydberg states … Experiment at NIST towards one-electron ions in circular Rydberg states …

Inelastic Neutron Scattering on Polymer Electrolytes for Lithium-Ion Batteries

May 7, 2012
Author(s)
Huagen H. Peng, Madhu Sudan Tyagi, Kirt A. Page, Christopher Soles
… The relationship between ion transport and polymer dynamics is central to the pursuit … solid polymer electrolyte systems of sufficiently high ion conductivities. Solid polymer electrolytes are highly … liquid electrolytes that are used today in commercial Li+ ion battery systems. Here we introduce inelastic neutron …

Spectroradiometer Characterization for Colorimetry of LEDs

May 1, 2001
Author(s)
Yoshihiro Ohno, B Kranicz
The uncertainties in color measurements of LEDs by spectroradiometers can be much larger than those for traditional broadband sources due to the quasi-monochromatic nature of LED spectra. In this paper, the uncertainties in chromaticity of LEDS due to

Frequently Asked Questions About Commercial Hydrogen Vehicle Refueling

December 28, 2018
Author(s)
Juana S. Williams
… "Commonly asked questions about hydrogen fuel cell electric vehicles (HFCEV) and hydrogen fuel availability, technology, safety; and the legal metrology requirements and terminology applicable to hydrogen fuel quality, measuring equipment, method of sale, …

Concentration of Hydrogen in Titanium Measured by Neutron Incoherent Scattering

May 1, 1998
Author(s)
Huaiyu H. Chen-Mayer, David F. Mildner, George P. Lamaze, Richard M. Lindstrom, Rick L. Paul, V. V. Kvardakov, W. J. Richards
… Symposium H: Hydrogen in Semiconductors and Metals … Proceedings in Materials Research Society Symposium: Hydrogen in Semiconductors and Metals … Concentration of Hydrogen in Titanium Measured by Neutron Incoherent Scattering …

ADVANCED NON-DESTRUCTIVE HYDROGEN SENSORS TO PREVENT MATERIAL DEGRADATION FROM HYDROGEN DAMAGE

January 5, 2009
Author(s)
Angelique N. Lasseigne, Kamalu Koenig, David Olson, Brajendra Mishra, Joshua Jackson, Thomas A. Siewert, Joseph D. McColskey
… steels (X100 and X120) exhibit lower tolerance for hydrogen (diffusible and formed hydrides) before significant … It is essential to have advanced sensors to monitor the hydrogen content and accumulation in the pipeline steel and … measurements have been utilized for in-situ monitoring of hydrogen content in pipelines. Low frequency induced current …

Switching-off Hydrogen Peroxide Hydrogenation in the Direct Synthesis Process

February 20, 2009
Author(s)
Andrew A. Herzing, Jennifer Edwards, Benjamin Solsona, Edwin Ntainjua, Albert F. Carley, Graham J. Hutchings, Christopher J. Kiely
… Hydrogen peroxide is an important disinfectant and bleach and … manufactured from an indirect process involving sequential hydrogenation/oxidation of anthraquinones. However, a direct process in which hydrogen and oxygen are reacted would be preferable. … "hydrogen peroxide synthesis", "spherical …
Displaying 51 - 75 of 3839
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