Results 31 to 40 of about 1,448,953 (255)
Effects of collisional cooling on ion detection in a quadrupole ion trap mass spectrometer
, 2011 The effects of collisional cooling on the storage and detection of ions in a quadrupole ion trap mass spectrometer are examined. Four parameters that affect the storage of ions are evaluated: the pressure of the buffer gas: the qz value which establishes
Wu, H. F. ; 吳慧芬; Brodbelt, J. S.
core +1 more source
Shortcuts to adiabaticity for an ion in a rotating radially-tight trap
New Journal of Physics, 2016 We engineer the fast rotation of an effectively one-dimensional ion trap for a predetermined rotation angle and time, avoiding the final excitation of the trapped ion.
M Palmero +4 more
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
, 2009 This paper describes the formation of protonated molecules ([M + H]+) and adduct ions by self-ion-molecule reactions (SIMR) during collisionally activated decomposition (CAD) of methyne addition ions ([M + CH]+) produced from chemical ionization (CI) or ...
Wu, Hui-fen; Wu, Mon-tin; Chen, Chien-hung
core +1 more source
Artificial molecular machines and motors—Design and control of nanoscale motion
FEBS Letters, EarlyView.Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley +1 more source
Background-free detection and mixed-species crystals in micro- and macroscopic ion-traps for scalable QIP [PDF]
, 2012 Scalability and the implementation of fault tolerant quantum gates are the two main challenges which must be overcome in order to unlock the vast potential of quantum computing. This thesis describes work with calcium ions trapped in both microscopic and
Linke, Norbert Matthias
core +1 more source
Zhipu XuebaoIn this study, a detailed experimental characterization of the relative ion abundance bias and the ion fragmentation in an ion funnel trap were reported by using both cytochrome C and ubiquitin samples in a tandem ion funnel hybrid ion mobility ...
Zhi-da GUO +6 more
doaj +1 more source
The Scientific World Journal, 2014 A new approach was recently introduced to improve the structure elucidation power of tandem mass spectrometry simulating the MS3 of ion trap mass spectrometry system overcoming the different drawbacks of the latter.
Ali S. Abdelhameed +5 more
doaj +1 more source
FEBS Letters, EarlyView.Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley +1 more source
Operation of a planar-electrode ion-trap array with adjustable RF electrodes
New Journal of Physics, 2016 One path to realizing systems of trapped atomic ions suitable for large-scale quantum computing and simulation is to create a two-dimensional (2D) array of ion traps.
M Kumph +6 more
doaj +1 more source