Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Magnetic field gradient effects

S. Handa, F. Okada, K. Kose 2005, (Effects of Magnetic Circuits on Magnetic Field Gradients Produced by Planar Gradient Coils, Proc 13th ISMRM, 851). [Pg.89]

Studies incorporating NMR detection in electrophoresis began in 1972 when Packer and coworkers examined MeaN" " ions under the influence of an electric current [89]. They determined that electrical current density in the sample and the radial motion of ions under the influence of the magnetic field induced undesirable magnetic field gradients. This work was followed up by Holz and Muller who suggested that the undesirable field gradients and their effects can be minimized if the electric... [Pg.378]

Pulsed-field-gradient NMR (291-292), in which spin echoes are measured in the presence of a time-dependent magnetic field gradient, has been used to determine effective diffusion coefficients, Deff, in beds of zeolite powder. Barrer (35) quotes the expression for the spin-echo amplitude given by Karger (259) in the form ... [Pg.306]

Temporal variation of magnetic field gradients along the X, Y, and Z axes a so-called pulse sequence for image acquisition is applied for MRI measurements. Several procedures have been developed for an effective determination of the spatial distribution of the spins. A detailed description of MRI pulse sequences is available in explanations by Callaghan,37 Blumich,38 and Kimmich.39... [Pg.204]

See other pages where Magnetic field gradient effects is mentioned: [Pg.322]    [Pg.322]    [Pg.322]    [Pg.322]    [Pg.1542]    [Pg.2467]    [Pg.1794]    [Pg.43]    [Pg.104]    [Pg.341]    [Pg.497]    [Pg.520]    [Pg.383]    [Pg.59]    [Pg.311]    [Pg.286]    [Pg.205]    [Pg.361]    [Pg.363]    [Pg.382]    [Pg.151]    [Pg.4]    [Pg.12]    [Pg.13]    [Pg.25]    [Pg.5]    [Pg.29]    [Pg.39]    [Pg.130]    [Pg.216]    [Pg.61]    [Pg.114]    [Pg.120]    [Pg.250]    [Pg.253]    [Pg.280]    [Pg.282]    [Pg.262]    [Pg.226]    [Pg.120]    [Pg.475]    [Pg.406]    [Pg.76]    [Pg.78]    [Pg.85]    [Pg.351]    [Pg.319]   
See also in sourсe #XX -- [ Pg.349 ]



SEARCH



Effective magnetic field

Electric Field Gradient Effects on Magnetic Susceptibility

Field gradient

Gradient magnetic fields

Magnet magnetic field gradients

Magnetic effective

Magnetic effects

Magnetic field, effect

Magnetic gradient

© 2024 chempedia.info