Zobrazeno 1 - 10
of 20
pro vyhledávání: '"R. J. PUGMIRE"'
Publikováno v:
Energy & Fuels. 15:14-22
Detailed structural information in carbonaceous solids with complex molecular structures may be obtained with a combination of three advanced solid-state NMR techniques, i.e., dipolar dephasing with variable dephasing times, 13C CP/MAS spectral editi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0d287c20af5b6dfb9fd8c7049db3311
https://doi.org/10.1021/ef0001888
https://doi.org/10.1021/ef0001888
Publikováno v:
Macromolecules. 33:3359-3367
The principal values of the 13C chemical shift tensors and the 1H−13C separated-local-field patterns are reported for the all-trans structures with long and short T1 as well as the more and less mobile amorphous segments in polyethylene. It is show
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c719a7c542148a347b490a08630505a8
https://doi.org/10.1021/ma9916842
https://doi.org/10.1021/ma9916842
Autor:
Martin L. Gorbaty, R. J. Pugmire, Mark S. Solum, Simon R. Kelemen, Thomas H. Fletcher, P. J. Kwiatek, M. Watt
Publikováno v:
Energy & Fuels. 12:159-173
X-ray photoelectron spectroscopy (XPS) was used to identify and quantify the changes in organically bound nitrogen forms present in the tars and chars of coals after pyrolysis. For fresh coal, pyrrolic nitrogen is the most abundant form of organicall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7d6f8aae6fd46ff78435754f5907f7a
https://doi.org/10.1021/ef9701246
https://doi.org/10.1021/ef9701246
Publikováno v:
Energy & Fuels. 9:717-726
The triple-echo magic angle turning 2D experiment together with short contact time and dipolar dephasing variations is used to investigate the structure of a series of coals and a naphthalene-derived pitch. The aromaticities obtained with the standar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7142fca241401870f9769e76c811ac9f
https://doi.org/10.1021/ef00052a021
https://doi.org/10.1021/ef00052a021
Publikováno v:
Energy & Fuels. 7:734-742
Soxhlet extractions were performed on the eight Argonne Premium coals using pyridine purged with argon and followed by a novel washing procedure to remove the pyridine. Mass closure (extracts plus residues) on duplicate experiments accounted for 94-9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f322c82aef1391ea8634a5a7482c079a
https://doi.org/10.1021/ef00042a006
https://doi.org/10.1021/ef00042a006
Publikováno v:
Physical Review A. 78
We have completed an extensive study of $^{129}\mathrm{Xe}$ longitudinal spin relaxation in the gas phase, involving both intrinsic and extrinsic mechanisms. The dominant intrinsic relaxation is mediated by the formation of persistent ${\mathrm{Xe}}_
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffea69f71d27b84d0010125c12415811
https://doi.org/10.1103/physreva.78.043406
https://doi.org/10.1103/physreva.78.043406
Publikováno v:
Journal of the American Chemical Society. 106:557-563
With use of the free radical Tempo as a shift and relaxation reagent, both paramagnetic shifts and spin-lattice relaxation rates of nitrogen heterocycles are reported. Paramagnetic shifts of these compounds are larger than the corresponding shifts of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cde403dec06d1821a1474c073c0a47b1
https://doi.org/10.1021/ja00315a017
https://doi.org/10.1021/ja00315a017
Autor:
R J Pugmire
A second set of six vitrinite samples were hand picked from the lower Kittanning Seam and obtained from Penn State University. The rank of the samples ranged from low volatile to high volatile B bituminous. The ultimate and proximate analyses are giv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0466539847f05204315bd3641e4ebb17
https://doi.org/10.2172/7021076
https://doi.org/10.2172/7021076
Publikováno v:
Chemischer Informationsdienst. 8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::499b124cc04dc2149857b67b67d5d1a4
https://doi.org/10.1002/chin.197711232
https://doi.org/10.1002/chin.197711232
Publikováno v:
Chemischer Informationsdienst. 9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2469b2787bcd7ade00d33dc3bfedf802
https://doi.org/10.1002/chin.197825047
https://doi.org/10.1002/chin.197825047