Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Thomas M. de Swiet"'
Autor:
Thomas M. de Swiet
Publikováno v:
Journal of Magnetic Resonance. 174:331-334
For many applications, reducing sample resistance, rather than increasing probe Q or filling factor, is the only way to further improve the signal-to-noise ratio of cryogenically cooled NMR probes. In this paper, bounds are calculated for the minimum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34ed52b70fd6536c8d5716c9f93f6fbe
https://doi.org/10.1016/j.jmr.2005.02.007
https://doi.org/10.1016/j.jmr.2005.02.007
Publikováno v:
The Journal of Physical Chemistry B. 106:8676-8680
Carbon-13 MAS refocused INADEQUATE experiments have been carried out on the polymer phase of CsC 6 0 and provide a complete and unambiguous assignment of the high-resolution carbon-13 MAS spectrum. This allows experimental Knight shifts for each carb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd448f2156d7d2d87f517be0266119d0
https://doi.org/10.1021/jp026093j
https://doi.org/10.1021/jp026093j
Autor:
Thomas M. de Swiet
Publikováno v:
The Journal of Chemical Physics. 112:8567-8572
Three-dimensional measurements of the 13C nuclear magnetic resonance (NMR) chemical shift in methyl-α-D-glucopyranoside are presented. One dimension measures the isotropic shift under ordinary magic angle spinning. In the remaining two dimensions, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cafee69ce2a1e366b8056303f7cbd86
https://doi.org/10.1063/1.481459
https://doi.org/10.1063/1.481459
Autor:
Thomas M. de Swiet
Publikováno v:
The Journal of Chemical Physics. 110:5231-5237
A direct transform of the NMR chemical shift anisotropy, operating on data acquired under magic angle spinning conditions, yielding rotationally invariant quantities, is potentially a source of increased resolution in solid state NMR. The mathematica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75bdea154774be56ad93447a867f7128
https://doi.org/10.1063/1.478419
https://doi.org/10.1063/1.478419
Publikováno v:
The Journal of Chemical Physics. 108:6233-6239
Molecular diffusion during the application of magnetic field gradients can distort magnetic resonance images. A systematic characterization of these distortions in one dimension was performed using highly spin-polarized xenon gas. By varying the stre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::274e57d624f2e80ac896028556832468
https://doi.org/10.1063/1.476030
https://doi.org/10.1063/1.476030
Publikováno v:
Chemical Physics Letters. 285:59-63
The NMR chemical shielding in a solid powder sample produces featured, but broad, lineshapes, or powder patterns, because the shielding experienced by a nuclear spin depends on the spatial orientation of its local molecular frame with respect to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be9039e04533f08e9fc6280c60d98ab4
https://doi.org/10.1016/s0009-2614(97)01478-4
https://doi.org/10.1016/s0009-2614(97)01478-4
Autor:
Thomas M. de Swiet, Pabitra N. Sen
Publikováno v:
The Journal of Chemical Physics. 104:206-209
We present a closed form expression for the diffusion coefficient in a dilute suspension of reflecting spheres, which is valid for all times. Our result is in agreement with general long and short time asymptotic results, which have been used in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f407a44ad6a168c0c99f6523e779126c
https://doi.org/10.1063/1.470890
https://doi.org/10.1063/1.470890
Publikováno v:
Journal of Non-Crystalline Solids. 182:198-205
Two manifestations of diffractive behavior in diffusion in a porous medium are reviewed. The measured amplitude, M(q, t), in a pulsed field gradient spin echo (PGSE) experiment probes the pore structure using two length scales, the gradient length q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cc3a4e937cd74953453c9c365ae991f
https://doi.org/10.1016/0022-3093(94)00542-7
https://doi.org/10.1016/0022-3093(94)00542-7
Autor:
Pabitra N. Sen, Thomas M. de Swiet
Publikováno v:
The Journal of Chemical Physics. 100:5597-5604
Transverse magnetization of spins diffusing in a bounded region in the presence of a constant field gradient is studied. We investigate the breakdown at short times of the much used formula for the Hahn echo amplitude in a constant gradient in unboun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cea5d69f2cfc1163f1ee226c98f60278
https://doi.org/10.1063/1.467127
https://doi.org/10.1063/1.467127
Publikováno v:
Journal of Magnetic Resonance. 133:385-387
Limitations of resolution and absorption in standard chemical spectroscopic techniques have made it difficult to study fluids in sedimentary rocks. In this paper, we show that a chemical characterization of pore fluids may be obtained in situ by magi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de0cf1eac76ebfe716f50d8cb3ebc671
https://doi.org/10.1006/jmre.1998.1459
https://doi.org/10.1006/jmre.1998.1459