Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Jirina. Karas"'
Autor:
John C. Crelling, Henk L. C. Meuzelaar, William H. McClennen, Ronald J. Pugmire, Jirina Karas, Huaying Huai
Publikováno v:
Energy & Fuels. 5:688-694
The objective of the present study is to examine the chemical structure and composition of Utah Wasatch Plateau coal resinite. Macerals were separated from the coal matrix by and picking, sink-float treatments, and/or density gradient centrifugation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c58ecbd0ca2acd3023fcec1279b9b52
https://doi.org/10.1021/ef00029a010
https://doi.org/10.1021/ef00029a010
Publikováno v:
International Journal of Coal Geology. 4:143-171
A set of 30 maceral concentrates consisting of 5 exinites (sporinites), 14 vitrinites and 11 inertinites (fusinites and semifusinites) was analyzed by Curie-point pyrolysis mass spectrometry in combination with computerized multivariate statistical a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01b5407ba6131469ce7071ce074dfdb2
https://doi.org/10.1016/0166-5162(84)90012-0
https://doi.org/10.1016/0166-5162(84)90012-0
Publikováno v:
International Journal of Coal Geology. 5:315-338
Eight coals have been selected for study of the physical and chemical properties of the maceral group . The density-gradient centrifugation technique was employed to affect maceral group separation. The maximum reflectance method of Ting and Lo was u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dc1c302e2472bc0ca23ca61b515a94c
https://doi.org/10.1016/0166-5162(85)90001-1
https://doi.org/10.1016/0166-5162(85)90001-1
Autor:
Jirina. Karas, Warner R. Woolfenden, Lawrence B. Alemany, Ronald J. Pugmire, P H. Given, David M. Grant, Michael A. Wilson
Publikováno v:
Analytical Chemistry. 56:933-943
Conventional and dipolar dephasing CP/MAS /sup 13/C NMR experiments are reported on 63 coals and coal macerals from lignite to anthracite ranks (from the US, the United Kingdom, and Australia). While the conventional experiment can yield only f/sub a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bafdd0bad84eaf6ad8a8f0e453e94d7
https://doi.org/10.1021/ac00270a018
https://doi.org/10.1021/ac00270a018
Autor:
M A. Wilson, R J. Pugmire, Jirina. Karas, L B. Alemany, W R. Woolfenden, D M. Grant, P H. Given
Publikováno v:
Analytical Chemistry. 56:2624-2624
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14f30d73a46de122cb45a9fdebf6ed49
https://doi.org/10.1021/ac00277a601
https://doi.org/10.1021/ac00277a601
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Autor:
RANDALL E. WINANS, JOHN C. CRELLING, A. D. COHEN, M. J. ANDREJKO, DAVID F. BENSLEY, DOUGLAS BRENNER, GARY R. DYRKACZ, C. A. A. BLOOMQUIST, L. RUSCIC, E. PHILIP HORWITZ, RONALD J. PUGMIRE, WARNER R. WOOLFENDEN, CHARLES L. MAYNE, JIRINA KARAS, DAVID M. GRANT, DEBORAH W. KUEHN, ALAN DAVIS, PAUL C. PAINTER, B. G. SILBERNAGEL, L. A. GEBHARD, RYOICHI HAYATSU, ROBERT G. SCOTT, ROBERT L. McBETH, CHOL-YOO CHOI, LEON M. STOCK
