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Search Publications

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Displaying 976 - 1000 of 2538

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 …

Molecular Oxygen (O2) Artifacts in Tandem Mass Spectra

November 20, 2024
Author(s)
Yuxue Liang, Pedatsur Neta, Xiaoyu (Sara) Yang, Hugo Garraffo, Tallat Bukhari, Yi Liu, Stephen Stein
… peak that could only be assigned to a peroxyl radical ion. For example, some protonated iodo-aromatics lose iodine … which reacts with O2 to generate a peroxyl radical ion [M+H-I+O2]+·. To confirm the O2 adduction, five compounds … radical peaks, which become dominant while the precursor ion peaks are consumed. The correlation of the peroxyl …

Energetics of Li Atom Displacements in K1-xLixTa03: First-Principles Calculations

July 1, 2003
Author(s)
S A. Prosandeev, Eric J. Cockayne, Benjamin P. Burton
K 1-xLi xTaO 3 (KLT) solid solutions exhibit a variety of interesting physical phenomena related to large local displacements of Li-ions from ideal perovskite A-site positions. First-principles calculations for KLT supercells were used to investigate these

Lattice damage in superconducting microcalorimeter detectors

June 3, 2013
Author(s)
Robert D. Horansky, Joel N. Ullom, Michael W. Rabin
… in using superconducting detectors for measurement of ion kinetic energies. Unprecedented resolution is possible … we will calculate the expected resolution limits due to ion damage, as well as use the Monte Carlo simulation SRIM to …

Competition Between the Inter- and Intra-sublattice Interactions in Yb 2 V 2 O 7

February 27, 2015
Author(s)
Z. L. Dun, J. Ma, H. B. Cao, Yiming Qiu, John R. Copley, T. Hong, M. Matsuda, J. G. Cheng, M. Lee, E. S. Choi, S. Johnston, H. D. Zhou
We studied single crystals of Yb 2V 2O 7 using dc and ac susceptibility measurements, elastic and inelastic neutron scattering measurements, and linear spin wave theory. The experimental data shows a ferromagnetic ordering of V 4+ ions at 70 K, a short

Quamtum coherence between two atoms beyond Q=10 15

April 22, 2011
Author(s)
Chin-Wen Chou, David Hume, Michael J. Thorpe, David J. Wineland, Till P. Rosenband
… quantum states of two Al+ ions in an Al+ -Al+ -Mg+ linear ion chain without spatially resolving the ions. …

Effect of Hydrogen on Pb(Zr,Ti)O 3 -Based Ferroelectric Capacitors

October 1, 1998
Author(s)
S R. Perusse, C W. Tipton, H D. Drew, T Venkatesan, R Ramesh, D B. Romero, V B. Podobedov, A Weber
… properties and Raman spectra. We propose that the hydrogen ion is bonded with one of the apical oxygen ions and prevents the Ti ion from switching. Pyroelectric measurements on forming …

ToF-SIMS Analysis of Ultrathin Films and Their Fragmentation Patterns

February 8, 2024
Author(s)
Shin Muramoto, Daniel Graham, David Castner
… in thickness from 1 to 20 nm, and time-of-flight secondary ion mass spectrometry coupled with principal component … cluster induced non-linear enhancement in secondary ion yield is no longer observed; extent of fragmentation is higher due to confinement of the primary ion energy; and the size of the primary ion source also …

Structural and Dynamical Behaviors of Fast Ionic Conducting Potassium nido -(Carba)borates

August 21, 2025
Author(s)
Mads B. Amdisen, Hui Wu, Mikael S. Andersson, Mirjana Dimitrievska, Wei Zhou, Torben R. Jensen, Craig Brown, Juscelino Leao, Terrence J. Udovic
… fluid anions are concomitant with fast potassium-ion conductivity. The highest ionic conductivity is observed … solid state battery, fast-ion conduction, crystal structure determination, neutron …

Instrumentation, Metrology, and Standards for Nanomanufacturing

September 10, 2007
Author(s)
Michael T. Postek, Andras Vladar, John A. Kramar, L A. Stern, John Notte, Sean McVey
… Helium Ion Microscopy (HIM) is a new, potentially disruptive … the helium ions, it is theoretically possible to focus the ion beam into a smaller probe size relative to that of an … voltage and materials involved. Conversely, the helium ion beam interacts with the sample, but it does not have as …

Generation of Non-Classical Motional States of a Trapped Atom

January 1, 1996
Author(s)
D M. Meekhof, C Monroe, B E. King, Wayne M. Itano, David J. Wineland
… and squeezed states of motion of a harmonically bound 9Be+ ion. The last three states are coherently prepared from an ion which has been initially laser cooled to the zero point of motion. The ion is trapped in the regime where the coupling between its …

Ion-Gel-Gating-Induced Oxygen Vacancy Formation in Epitaxial La 0.5Sr d0.5^CoO^d3-d Films from in operando X-ray and Neutron Scattering

December 19, 2017
Author(s)
Jeff Walter, Guichuan Yu, Biqiong Yu, Alexander Grutter, Brian Kirby, Julie Borchers, Zhan Zhang, Hua Zhou, Turan Birol, Martin Greven, Chris Leighton
… polarized neutron reflectometry as in operando probes of ion-gel transistors based on ferromagnetic La 0.5 Sr 0.5 … Ion-Gel-Gating-Induced Oxygen Vacancy Formation in Epitaxial …

Metal-Insulator transition in Doped Barium Plumbate

September 16, 2021
Author(s)
Andreza M. Eufrasio, Ian L. Pegg, Nikolaus Deems, Biprodas Dutta, Winnie Wong-Ng, Qingzhen Huang
Solid solutions in the Ba(Pb1−xSrx)O3−z system were prepared by aliovalent substitution of Pb4+ by Sr2+ ions to investigate the effect of cation stoichiometry on thermal and electrical properties as x was varied between 0 and 0.4, in the temperature range

Fundamentals of Mass Spectrometry

December 1, 2001
Author(s)
Vladimir G. Zaikin, Alexey V. Varlamov, Anzor I. Mikaia, Nikolay A. Prostakov
… and mass analyzers. Special chapters are devoted to the ion types in mass spectrometry and to the use of isotopes in …
Displaying 976 - 1000 of 2538
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