Results 31 to 40 of about 1,294,516 (291)
3D-Printable Model of a Particle Trap: Development and Use in the Physics Classroom
Journal of Open Hardware, 2019 Quadrupole ion traps are modern and versatile research tools used in mass spectrometers, in atomic frequency and time standards, in trapped ion quantum computing research, and for trapping anti-hydrogen ions at CERN.
Lachlan McGinness +7 more
doaj +1 more source
Ion trapping in high intensity linear accelerators [PDF]
, 2017 A charged particle beam will rapidly ionize any residual gas in an accelerator's vacuum chamber, and, if that beam is negatively charged, the resulting positive ions can become trapped within the beam.
Full, Steven Joseph
core +1 more source
Particle trapping and hopping in an optofluidic fishnet
, 2017 Particle jumping between optical potentials has attracted much attention owing to its extensive involvement in many physical and biological experiments.
Lip Ket Chin +13 more
core +1 more source
Trapping of Langmuir waves in ion holes
, 2004 We present analytical and numerical studies of a new electron plasma wave interaction mechanism which reveals trapping of Langmuir waves in ion holes associated with non-isothermal ion distribution functions.
Shukla, Padma Kant, Eliasson, Bengt
core +4 more sources
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Optical trapping using ultrashort 12.9fs pulses [PDF]
, 2016 We demonstrate stable three-dimensional optical trapping of 780nm silica particles using a dispersion-compensated 12.9fs infrared pulsed laser and a trapping microscope system with 1.40NA objective.
Lee, Woei Ming (Steve) +3 more
core +1 more source
Reliable transport through a microfabricated X-junction surface-electrode ion trap
New Journal of Physics, 2013 We report the design, fabrication and characterization of a microfabricated surface-electrode ion trap that supports controlled transport through the two-dimensional intersection of linear trapping zones arranged in a 90° cross.
Kenneth Wright +11 more
doaj +1 more source
Physical Review Accelerators and Beams, 2022 The electron gun of the REXEBIS charge breeder at the REX/HIE-ISOLDE facility at CERN has been upgraded from a standard magneto-immersed type to a gun using a nonadiabatic magnetic element.
H. Pahl +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