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Displaying 1501 - 1525 of 3757

Microwave measurements of proton tunneling and structural parameters for the propiolic acid - formic acid dimer.

October 21, 2011
Author(s)
Adam M. Daly, Kevin O. Douglass, Laszlo C. Sarkozy, Justin L. Neill, Matt T. Muckle, Daniel P. Zaleski, Brooks H. Pate, Stephen G. Kukolich
… spectra of the propiolic acid-formic acid, (Pro-FA) doubly hydrogen bonded complex were measured in the 1-21 GHz range. … With one deuterium atom substituted in either of the hydrogen-bonding protons, the tunneling splittings were not … OH distances. The formic OH•••O propiolic hydrogen bond length is 1.8 Å and the propiolic …

Quantum Projection Noise: Population Fluctuations in 2-Level Systems

January 1, 1993
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, J M. Gilligan, D J. Heinzen, F L. Moore, M G. Raizen, David J. Wineland
… are available. In the experiments described here, a single ion or a few identical ions were prepared in well-defined … of the energy levels were then measured. For an individual ion, the outcome of the measurement is uncertain, unless the …

Dynamic Signature of Molecular Association in Methanol

July 7, 2016
Author(s)
Christopher E. Bertrand, Jeffrey L. Self, John R. Copley, Antonio Faraone
… and also originates from the formation and dissolution of hydrogen-bonded associates (supermolecular clusters). In … supercooled water, but may instead be a general feature of hydrogen-bonding liquids. …

Cosolvent-assisted Spray Pyrolysis for the Generation of Metal Particles

July 1, 2003
Author(s)
Valeri I. Babushok, S H. Ehrman, Thomas Germer, Jae H. Kim, George W. Mulholland
… from metal salt precursors without the direct addition of hydrogen or other reducing gas. Generation of pure copper and … during spray pyrolysis via in-situ production of hydrogen and carbon monoxide. …

Comparison of Submicron Particle Analysis by Auger Electron Spectroscopy, Time-of-Flight Secondary Ion Mass Spectrometry, and Secondary Electron Microscopy With Energy Dispersive X-Ray Spectroscopy.

July 31, 1996
Author(s)
George W. Mulholland, K D. Childs, D Narum, L A. LaVanier, P M. Lindley, B W. Schueler, A C. Diebold
… of Auger electron spectroscopy, time-of-flight secondary ion mass spectrometry, and energy dispersive x-ray … by Auger Electron Spectroscopy, Time-of-Flight Secondary Ion Mass Spectrometry, and Secondary Electron Microscopy With …

Superhydrophilic porous transport layer enhances effciency of polymer electrolyte membrane electrolyzers

October 20, 2021
Author(s)
Benzhong Zhao, ChungHyuk Lee, Jason K. Lee, Kieran F. Fahy, Jacob LaManna, Elias Baltic, David Jacobson, Daniel Hussey, Aimy Bazylak
… Hydrogen is widely regarded as a promising vehicle for … and high energy density. A prominent technology for hydrogen generation is the polymer electrolyte membrane (PEM) electrolyzer, which decomposes liquid water into hydrogen and oxygen gas. However, the energy efficiency of …

A Novel Method to Covalently Functionalize Carbon Nanotubes with Isocyanates

September 30, 2009
Author(s)
Tinh Nguyen, Aline Granier, Kristen L. Steffens, Hajin Lee, Naomi Eidelman, Jonathan W. Martin
… desirable, because the NCO group is highly reactive with hydrogen-active groups, such as OH, COOH, and NH, which are … the higher reactive NCO is allowed to react with hydrogen-active CNTs, while the less reactive NCO groups … CNTs (NCO-fMWCNTs) have been successfully prepared using hydrogen-active carboxylic-terminated CNTs. Spectroscopic and …

Reaction Mechanism of Chorismate Mutase Studied by the Combined Potentials of Quantum Mechanics and Molecular Mechanics

November 21, 2002
Author(s)
Y. S. Lee, S. E. Worthington, Morris Krauss, B R. Brooks
… in the quantum region to explore whether the strong ionic hydrogen bonding of the side chains to the substrate has a catalytic effect. The hydrogen bond from glu78 induces electronic effects in the … forms. In this study, the reacting complex forms a hydrogen bond to arg63 and stabilizes the region near the …

Copper Oxide Precipitates in NBS Standard Reference Material 482

December 1, 2002
Author(s)
Eric S. Windsor, R Carlton, John G. Gillen, Scott A. Wight, David S. Bright
… using light microscopy, electron microscopy and secondary ion mass spectrometry (SIMS). SIMS has demonstrated that the … oxide inclusions, sample preparation, secondary ion mass spectrometry, Standard Reference Material 482 …

in-Adamantane, a Small Inside-Out Molecule

September 25, 2008
Author(s)
Karl K. Irikura
… in-adamantane, an adamantane isomer in which one methine hydrogen atom is inside the cage, is predicted by ab initio … frequency about 600 cm-1 higher than usual. The interior hydrogen atom has an nmr shift more typical of aromatic …
Displaying 1501 - 1525 of 3757
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