Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Ghirmai Meresi"'
Autor:
Ghirmai Meresi, Wen-Yang Wen, A. A. Jones, Jaimie Gosselin, Paul T. Inglefield, Yingzi Wang, David Azar
Publikováno v:
Macromolecules. 34:6680-6683
Pulse field gradient diffusion measurements were made on the decafluoropentane molecule, CF3CHFCHFCF2CF3, in the copolymer of tetrafluoroethylene (TFE) and 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (BDD). The proton spectrum consisted of two
Autor:
Wen-Yang Wen, A. A. Jones, A Tao, Yingzi Wang, Ghirmai Meresi, Athinodoros Bandis, X Gong, Paul T. Inglefield
Publikováno v:
Polymer. 42:6485-6492
Self-diffusion constants for water, ethanol and decafluoropentane were measured in the perfluorosulfonate ionomer NafionR using pulse field gradient proton NMR. Measurements were made as a function of concentration, temperature and diffusion time. Fo
Autor:
Yingzi Wang, Wen, Alan A. Jones, Ghirmai Meresi, David Azar, Job D. Cardoza, Jaimie Gosselin, Paul T. Inglefield
Publikováno v:
Macromolecules. 34:4852-4856
Pulse field gradient diffusion measurements of pentane in a random copolymer of tetrafluoroethylene (TFE) and 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (PDD) were made as a function of the time allowed for diffusion to occur. The initial chan
Autor:
Yingzi Wang, Wen-Yang Wen, Athinodoros Bandis, Paul T. Inglefield, Ghirmai Meresi, A. A. Jones
Publikováno v:
Polymer. 42:6153-6160
At magic angle spinning speeds above 5 kHz, two major fluorine-19 resonances can be resolved in the acid form of the perfluorosulfonate ionomer Nafion (DuPont trademark). The larger signal at −120 ppm versus CFCl3 is assigned to the backbone CF2 gr
Publikováno v:
Journal of Magnetic Resonance. 142:11-23
Theory for describing the density matrix of a spin system experiencing chemical exchange and relaxation during the steps of an NMR experiment is presented in a form suitable for computation. Features in the theory that arise from exchange are discuss
Publikováno v:
Macromolecules. 34:1131-1133
Publikováno v:
Journal of magnetic resonance (San Diego, Calif. : 1997). 137(1)
A method for the inclusion of the effects ofz-axis pulsed field gradients in computer simulations of an arbitrary pulsed NMR experiment with spin 1 2 nuclei is described. Recognizing that the phase acquired by a coherence following the application of