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Search Publications

NIST Authors in Bold

Displaying 951 - 975 of 2538

Improved Limits on Variation of the Fine Structure Constant and Violation of Local Position Invariance

May 29, 2007
Author(s)
Tara M. Fortier, Neil Ashby, James C. Bergquist, Marie Delaney, Scott A. Diddams, Thomas P. Heavner, Leo W. Hollberg, Wayne M. Itano, Steven R. Jefferts, K Kim, Windell Oskay, Thomas E. Parker, Jon H. Shirley, Jason Stalnaker, Filippo Levi, Luca Lorini
We report tests of Local Position Invariance (LPI) and constancy of fundamental constants from measurements of the frequency ratio of the 282-nm 199Hg + optical clock transition to the ground-state hyperfine splitting in 133Cs. Analysis of the frequency

Creation of an Ultracold Neutral Plasma

December 1, 1999
Author(s)
T C. Killian, S Kulin, S D. Bergeson, Luis A. Orozco, C R. Orzel, S L. Rolston
… is evident in the trapping of electrons by the positive ion cloud when the Debye screening length becomes smaller …

Simulation study of the capacitance and charging mechanisms of ionic liquid mixtures near carbon electrodes

January 4, 2019
Author(s)
Alta Y. Fang, Alexander Y. Smolyanitsky
… planar graphene sheets as electrodes. We demonstrate that ion-electrode van der Waals attractions play an important … the two pure ionic liquids. We characterize cumulative ion densities near electrodes carrying various surface … in the ionic liquid mixtures we identify an effective ion exchanging mechanism wherein charging of the electrodes …

Trapped Ions and Laser Cooling, V

February 20, 2002
Author(s)
James C. Bergquist, John J. Bollinger, Wayne M. Itano, David J. Wineland
… Trapped Ions and Laser Cooling, V …

A Mercury-Ion Optical Clock

September 9, 2001
Author(s)
James C. Bergquist, U Tanaka, Robert E. Drullinger, Wayne M. Itano, David J. Wineland, Scott A. Diddams, Leo W. Hollberg, E A. Curtis, Christopher W. Oates, T Udem
… A Mercury-Ion Optical Clock …

Cooling Methods in Ion Traps

January 1, 1995
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, David J. Wineland
… Cooling Methods in Ion Traps …

Quantum Measurements of Trapped Ions

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
… Quantum Measurements of Trapped Ions …

Quantum Measurements of Trapped Ions

January 1, 1992
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
… Quantum Measurements of Trapped Ions …

Trapped Ion Frequency Standards

January 1, 1991
Author(s)
David J. Wineland, Wayne M. Itano, James C. Bergquist, John J. Bollinger, D J. Heinzen, C H. Manney, F L. Moore, M G. Raizen, C S. Weimer
… Trapped Ion Frequency Standards …

Trapped Ions and Laser Cooling:

January 1, 1985
Author(s)
James C Bergquist, John J Bollinger, Wayne M Itano, David J Wineland
… Trapped Ions and Laser Cooling: …

Unexpected Gas-Phase Nitrogen-Oxygen Smiles Rearrangement: CID of Deprotonated 2-(N-Methylanilino)ethanol and Morpholinylbenzoic Acid Derivatives

October 21, 2022
Author(s)
Yuxue Liang, Yamil Simon, Pedatsur Neta, Stephen E. Stein
… a five-membered ring rearrangement to form a phenoxide ion C6H5O-. When R = H, such a Smiles rearrangement is … an anilide anion (C6H5NH-, m/z 92) rather than a phenoxide ion (C6H5O-, m/z 93.0343). However, when the amino hydrogen … Smiles rearrangement does occur, leading to the phenoxide ion, as the negative charge can only reside on the oxygen …

Large variations in the composition of ionic liquid-solvent mixtures in nanoscale confinement

July 9, 2019
Author(s)
Alta Y. Fang, Alexander Y. Smolyanitsky
… pore widths only slightly larger than the sizes of bare ion or solvent molecules. The composition of the electrolyte … very narrow pores, while for pore widths close to the bare ion sizes we observe an in-pore ionic liquid mole fraction … of ions from the pore or a slight depletion of ions, while ion population again increases as pore width further …

A trapped human PPM1A-phosphopeptide complex reveals structural features critical for regulation of PPM protein phosphatase activity

May 24, 2018
Author(s)
Subrata Debnath, Dalibor Kosek, Harichandra Tagad, Stewart R. Durell, Daniel Appella, Roderico Acevedo, Alexander Grishaev, Fred Dyda, Ettore Appella, Sharlyn Mazur
… two tightly bound metal ions and an additional third metal ion in the active site. Here, the crystal structure of the … confirmed the presence of the anticipated third metal ion in the active site of metazoan PPM phosphatases. … between the bound substrate and the labile metal ion. This work illuminates the structural and thermodynamic …
Displaying 951 - 975 of 2538
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