Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Warner R. Woolfenden"'
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:
L.L. Anderson, Warner R. Woolfenden, Raphael Ikan, Zeev Aizenshtat, Ronald J. Pugmire, P. Ioselis, Y. Rubinsztain
Publikováno v:
Organic Geochemistry. 9:199-212
Melanoidins synthesized from amino-acids and sugars in various ratios and humic substances from Hula Basin (Israel) have been investigated by 13 C-CP/MAS NMR spectroscopy. Most spectra indicated a significant similarity between melanoidins and humics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9e5523253560366b137829b73c0534d
https://doi.org/10.1016/0146-6380(86)90070-7
https://doi.org/10.1016/0146-6380(86)90070-7
Publikováno v:
Journal of the American Chemical Society. 99:7142-7150
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::102fb8e3f910f72906fd29af4826c45e
https://doi.org/10.1021/ja00464a008
https://doi.org/10.1021/ja00464a008
Publikováno v:
The Journal of Organic Chemistry. 47:5318-5321
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bfba1d43c29d1fabda1e2f990ae5b61
https://doi.org/10.1021/jo00148a018
https://doi.org/10.1021/jo00148a018
Autor:
Donald W. Alderman, Charles L. Mayne, Ronald J. Pugmire, Warner R. Woolfenden, David M. Grant, Y. J. Jiang
Publikováno v:
Review of Scientific Instruments. 58:755-758
A newly designed stator assembly for cylindrical spinners used in magic‐angle spinning nuclear‐magnetic‐resonance experiments is described. Separate driving and bearing gas chambers allow variable and stable spinning speeds, and this design per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9afbf85c5aff131b4fb4aebc386a6a3b
https://doi.org/10.1063/1.1139626
https://doi.org/10.1063/1.1139626
Autor:
David M. Grant, Warner R. Woolfenden, Kurt W. Zilm, Ronald J. Pugmire, E.Phillip Horwitz, C. A. A. Bloomquist, Gary R. Dyrkacz
Publikováno v:
Organic Geochemistry. 4:79-84
The density gradient centrifugation technique has recently been applied to the separation of macerals from whole coals. Sufficient quantities have been separated to permit examination of pure exinite, vitrinite and inertinite fractions by combined cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44f54f8fff9c5e8f27c0be78afb43916
https://doi.org/10.1016/0146-6380(82)90010-9
https://doi.org/10.1016/0146-6380(82)90010-9
Publikováno v:
Biochemical and Biophysical Research Communications. 107:684-694
The unique ability of Carbon-13 nuclear magnetic resonance analysis with cross polarization/magic angle spinning techniques to investigate chemical structures of solids is used to probe the chemical characteristics of several gallstone types. New pul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e149fcbcc394a128875b603d67f8e1a8
https://doi.org/10.1016/0006-291x(82)91545-5
https://doi.org/10.1016/0006-291x(82)91545-5
Publikováno v:
The Journal of Physical Chemistry. 73:3177-3180
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::210e07e2eccf8a77167232ba9e8df77d
https://doi.org/10.1021/j100844a001
https://doi.org/10.1021/j100844a001
Autor:
David M. Grant, Warner R. Woolfenden
Publikováno v:
Journal of the American Chemical Society. 88:1496-1502
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57efa13c18bb22d511a6bfa08aa325c7
https://doi.org/10.1021/ja00959a032
https://doi.org/10.1021/ja00959a032