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Displaying 376 - 400 of 1646

Complete collision data set for electrons scattering on molecular hydrogen and its isotopologues: III. Vibrational excitation via electronic excitation and radiative decay.

August 10, 2022
Author(s)
Dmitry Fursa, Mark Zammit, Igor Bray, Liam Scarlett, Daniel Boyle, Yuri Ralchenko
… of the ground electronic state (X 1Σ+ g ) of molecular hydrogen and its isotopologues (H2, HD, HT, D2, DT and T2). … molecular hydrogen, vibrational excitation, electronic excitation, … collision data set for electrons scattering on molecular hydrogen and its isotopologues: III. Vibrational excitation …

Detection of molecular hydrogen in a neutron beam lifetime experiment

December 12, 2025
Author(s)
Jimmy Caylor, Ripan Biswas, Bret Crawford, Maynard Dewey, Nadia Fomin, Geoffrey Greene, Shannon Hoogerheide, Jose Hungria-Negron, Hans Mumm, Jeffrey Nico, Daniel Valete, Fred Wietfeldt, Joseph Zuchegno
… lost, gained, or misidentified. The influence of molecular hydrogen interactions is of particular interest because of … performed on the production and detection of molecular hydrogen in an apparatus used to measure the neutron … We demonstrate that charge exchange with molecular hydrogen can occur with trapped protons, and we determine the …

Modeling the Fatigue Crack Growth of X100 Pipeline Steel in Gaseous Hydrogen

August 20, 2013
Author(s)
Robert L. Amaro, Neha N. Rustagi, Andrew J. Slifka, Elizabeth S. Drexler, Kip Findley
… Hydrogen is likely to play a key role (worldwide) in a future … to be the most economical means to transport gaseous hydrogen, fundamental understanding of the deleterious effects of hydrogen on the fatigue and fracture properties of pipeline … the Fatigue Crack Growth of X100 Pipeline Steel in Gaseous Hydrogen …

Construction of a Dual Protease Column, Subzero (-30 degC) Chromatography System and Multi-channel Precision Temperature Controller for Hydrogen-Deuterium Exchange Mass Spectrometry

August 12, 2020
Author(s)
Jeffrey Hudgens
… protease column, subzero, liquid chromatography system for hydrogen- deuterium exchange mass spectrometry (HDX-MS). … chromatography, hydrogen-deuterium exchange, mass spectrometry, precision, … and Multi-channel Precision Temperature Controller for Hydrogen-Deuterium Exchange Mass Spectrometry …

Complete collision data set for electrons scattering on molecular hydrogen and itsisotopologues: I. Fully vibrationally-resolved electronic excitation of H 2 (X 1 ? g + ).

January 1, 2021
Author(s)
Liam H. Scarlett, D Fursa, Mark C. Zammit, I Bray, Yuri Ralchenko, Kayla D. Davie
… for electron-impact electronic excitation of molecular hydrogen suitable for implementation in collisional-radiative … excitation, molecular hydrogen, convergent close coupling, analytic fits, … collision data set for electrons scattering on molecular hydrogen and itsisotopologues: I. Fully …

HEXRD Measurement of Strain and Dislocation Density ahead of Crack Tips Grown in Hydrogen

September 13, 2019
Author(s)
Matthew J. Connolly, May L. Martin, Peter E. Bradley, Damian S. Lauria, Andrew J. Slifka, Jun Sang Park, Robert Amaro
… The deformation fields near fatigue crack tips grown in hydrogen and in air were measured using high-energy x-ray … A larger magnitude of elastic strain was observed in the hydrogen case compared to the air case. The magnitude of … back-scatter diffraction. Ahead of the crack tip grown in hydrogen, an order of magnitude lower dislocation density, …

Special Problems When Realising the Triple Point of Hydrogen as a Defining Fixed Point of the ITS-90

June 1, 2001
Author(s)
B Fellmuth, D I. Head, F Pavese, A Szmyrka-Grzebyk, Weston L. Tew
… problems, which appear when realising the triple point of hydrogen as a temperature fixed point due to the influences … deuterium, ferric hydroxide, gadolinium oxide, hydrogen, ITS-90, ortho-para conversion, sealed triple point … Special Problems When Realising the Triple Point of Hydrogen as a Defining Fixed Point of the ITS-90 …

Inhibition of cellular proliferation and enhancement of hydrogen peroxide production in fibrosarcoma cell line by weak radio frequency magnetic fields

September 23, 2014
Author(s)
Pablo Castello, Iain Hill, Lucas Portelli, Frank Barnes, Robert J. Usselman, Carlos Martino
… effects of weak radio frequency (RF) magnetic fields on hydrogen peroxide (H2O2) production and cellular growth rates … field effects, cellular growth curves, cancer cells, hydrogen peroxide, radical pair mechanism … Inhibition of cellular proliferation and enhancement of hydrogen peroxide production in fibrosarcoma cell line by …

Vacancy-Hydrogen Defects in Aluminum Formed During Aqueous Dissolution

September 16, 2010
Author(s)
K. R. Hebert, J. Ai, Gery R. Stafford, K. M. Ho, C. Z. Wang
… of aluminum is accompanied by extensive absorption of hydrogen, along with formation of hydride and voids. We used … mechanisms leading to either interstitial or vacancy-hydrogen (Vac-H) defects, and to relate defect formation to … with a high fraction of dissolved Al atoms forming vacancy-hydrogen (Vac-H) defects. Electrochemical potential …

Complete collision data set for electrons scattering on molecular hydrogen and its isotopologues: I. Fully vibrationally-resolved electronic excitation of H2(X 1O+g ).

June 16, 2020
Author(s)
Liam H. Scarlett, D Fursa, Mark C. Zammit, Igor Bray, Yuri Ralchenko, Kayla D. Davie
… for electron-impact electronic excitation of molecular hydrogen suitable for implementation in collisional-radiative … electron-impact excitation, hydrogen molecule, cross sections, molecular convergent close … collision data set for electrons scattering on molecular hydrogen and its isotopologues: I. Fully …

Estimation of Concentration and Bonding Environment of Water Dissolved in Common Solvents Using Near Infrared Absorptivity

October 1, 1998
Author(s)
Brian Dickens, Sabine H. Dickens
… Ņ2 + Ņ3 combination band of water varies with the type of hydrogen bonding of the water molecule because the shape of the NIR absorption envelope changes with the hydrogen bonding.Because the integrated NIR absorptivity of … the NIR absorption envelope reflects the distribution of hydrogen bonding of the water. The shape and location of the …

Direct Verification of Hydrogen Termination of the Semiconducting Diamond (111) Surface

July 1, 1982
Author(s)
B Waclawski, Daniel T. Pierce, Nils Swanson, Robert Celotta
… has been used to identify the vibrational modes of hydrogen on the semiconducting diamond surface providing the … evidence that the (111) 1X1 surface is terminated by hydrogen. The vibrational loss spectrum from the … diamond. Exposure of this reconstructed surface to atomic hydrogen results in a loss spectrum which is essentially …

Mechanism of Gas-Phase Hydrogenation of Alicyclic Ketones on Iron Catalyst: Effective

May 1, 1985
Author(s)
Anzor I. Mikaia, Leonid S. Glebov, Vladimir Smetanin, Vladimir G. Zaikin, George A. Kliger, Sergai Loktev
… Mechanism of gas phase hydrogenation of cyclopentanone and cyclohexanone over a … of reaction products. It is established that cyclanone hydrogenation reactions proceed both via ketonic and enolic … Mechanism of Gas-Phase Hydrogenation of Alicyclic Ketones on Iron Catalyst: Effective …

Assessing girth weld quality of pipeline steels and their susceptibility to hydrogen embrittlement

August 28, 2024
Author(s)
Zack Buck, Newell Moser, Nicholas Derimow, May Ling Martin, Damian Lauria, Enrico Lucon, Douglas Stalheim, Peter Bradley, Matthew Connolly
… Hydrogen has long been considered a viable carbon-free option … and alternative technologies. However, the effects of hydrogen-assisted damage mechanisms that result in the … reduction in ductility, and fracture when exposed to hydrogen. Predicting lifetimes of pipelines can be difficult …

Microstructure effects on the fracture surface resistance of base metal in line pipe steels in high pressure H2 gas

April 29, 2025
Author(s)
Andrew LeBoeuf, Santigopal Samanta, Joseph Ronevich, Christopher San Marchi, Zachary Buck, Matthew Connolly, Lawrence Cho, Kip Findley
… Cost-effective transportation of gaseous hydrogen requires the use of long-distance low-carbon steel … exhibit decreased fracture resistance due to exposure to hydrogen, recent data shows that fracture resistance can vary … the fracture response of modern pipeline grades in hydrogen gas. ASTM E1820 fracture toughness tests were …

Pore Modulation of Hydrogen-Bonded Organic Frameworks for Efficient Separation of Propylene

September 11, 2023
Author(s)
Youlie Cai, Junkuo Gao, Jing-Hong Li, Puxu Liu, Yanchun Zheng, Wei Zhou, Hui Wu, Libo Li, Rui-Biao Lin, Banglin Chen
… Developing hydrogen-bonded organic frameworks (HOFs) that combine … there is a lack of effective strategies to tune the hydrogen-bonded network to achieve high-performance HOFs. … by introducing structure-directing agents (SDAs) into the hydrogen-bonding network of tetrakis (4-carboxyphenyl) …
Displaying 376 - 400 of 1646
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