Zobrazeno 1 - 10
of 124
pro vyhledávání: '"M M, Pintar"'
Autor:
H. Peemoeller, Carolyn M. Hansson, R. Holly, Jessie Greener, Changho Choi, M. M. Pintar, Eric J. Reardon
Publikováno v:
Journal of the American Ceramic Society. 83:623-627
By monitoring the free induction decay and spin–echo envelope (acquired with the Meiboom–Gill modified Carr–Purcell pulse sequence), during hydration of white cement paste, information about growth patterns of various cements is obtained. In pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa58fa950d5acacbd9771267a08c4b41
https://doi.org/10.1111/j.1151-2916.2000.tb01242.x
https://doi.org/10.1111/j.1151-2916.2000.tb01242.x
Autor:
M. M. Pintar
This set of essays was given as lectures at the 4th Waterloo International Summer School on Nuclear Magnetic Resonance held in June 1975 at the University of Water loo. The school was sponsored by the National Research Council of Canada and by the
Publikováno v:
Journal of Magnetic Resonance. 145:1-7
The time evolution of the proton Zeeman magnetization in the rotating frame at the magic angle θ M = cos −1 (1/3) is calculated for an isolated tunneling methyl group and its Fourier transform is given. The calculation compares well with the exper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7890caa6df06fc6b5ef0c966877a28f8
https://doi.org/10.1006/jmre.2000.2019
https://doi.org/10.1006/jmre.2000.2019
Publikováno v:
Journal of Magnetic Resonance. 144:1-5
A low-temperature, high-power NMR probe head design is described which eliminates the problem of electric arc discharge commonly experienced during radiofrequency pulse cycling in a helium environment. A polychlorotrifluoroethylene (Kel-F) coil forme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c25c009f04a2bc15c8e46f60524808e
https://doi.org/10.1006/jmre.2000.2015
https://doi.org/10.1006/jmre.2000.2015
Autor:
M. M. Pintar, Changho Choi
Publikováno v:
The Journal of Chemical Physics. 109:5542-5546
A study in the proton spin-rotating frame of the Zeeman-tunneling level matching of strongly hindered palmetic acid rotators CH3 is reported. A set of consecutive spin-torsional matching resonances was employed to saturate the tunneling polarization.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80b18476199cd3423b282078e7804988
https://doi.org/10.1063/1.477172
https://doi.org/10.1063/1.477172
Publikováno v:
Physical Review B. 58:7340-7346
Partially hydrated LUDOX silica spheres (LUDOX colloidal silica HS-40, E.I. DuPont de Nemours Co.) of 15 nm diameter represent a system where the wetting layer of water is quite well defined in the sense that the study of the structure and dynamics o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5e974985704164d35161f22b91f0f6c
https://doi.org/10.1103/physrevb.58.7340
https://doi.org/10.1103/physrevb.58.7340
Publikováno v:
Journal of Applied Physics. 83:3535-3540
Structure and dynamics of a hydrated white cement were investigated by the T1-weighted lineshape, two-dimensional (2D) exchange, and 2D separation of inhomogeneous and homogeneous lineshapes nuclear magnetic resonance (NMR) techniques. T1 weighting o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e8038a1e02148f14ce2e6f18bf367a8
https://doi.org/10.1063/1.366567
https://doi.org/10.1063/1.366567
Publikováno v:
The Journal of Chemical Physics. 108:4183-4188
Proton rotating frame spin-lattice relaxation times of water in hydrated porous silica glass, with pore diameters of 7.4, 23.7, 49.1, and 54.8 nm, are reported. Experiments were limited to hydrations corresponding to more than one-third hydrated pore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2fac39e462ccb8aae754afad6976750
https://doi.org/10.1063/1.475816
https://doi.org/10.1063/1.475816
Publikováno v:
The Journal of Chemical Physics. 108:3962-3965
Matching of Zeeman and tunneling levels in the proton spin rotating frame is used to detect splitting of the torsional ground state due to rotational tunneling of the NH4 group in solid NH4I. When highly polarized Zeeman splitting matches tunneling s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31a7509fdf5cea25b2516fe0ebce8a9a
https://doi.org/10.1063/1.475798
https://doi.org/10.1063/1.475798
Publikováno v:
The Journal of Chemical Physics. 107:10225-10228
Dehydration of porous glass hydrated with a 5 mM solution of the spin-label molecules 2,2,6,6-tetramethyl-4-acetamido-piperidine-1-oxyl (TMAPO) was studied with electron paramagnetic resonance at 9 GHz. The spin-label molecules’ concentration remai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58ad122be4a3342d5967529ee8541190
https://doi.org/10.1063/1.474163
https://doi.org/10.1063/1.474163