Zobrazeno 1 - 10
of 34
pro vyhledávání: '"H. Willsch"'
Publikováno v:
Organic Geochemistry. 35:665-678
Aromatic nitrogen and other novel hopanoid-related compounds were tentatively identified in biodegraded crude oils from the Liaohe Basin, NE China. They include naphthohopanes, pyridino-, quinolino-, acridino- or benzoquinolino-, and naphthoquinolino
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74edd821c40b211995b5825912db8e3f
https://doi.org/10.1016/j.orggeochem.2004.02.005
https://doi.org/10.1016/j.orggeochem.2004.02.005
Autor:
M. Radke, H. Willsch
Publikováno v:
Polycyclic Aromatic Compounds. 7:231-251
The concentration of 131 polycyclic aromatic compounds (PAC) has been determined by capillary gas chromatography in the solvent extracts of eight bituminous coals with vitrinite reflectance (Rr) in the range of 0.9–1.9%. The distributions of PAC th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de68dbbe4ee5a9fa19320c67958ac058
https://doi.org/10.1080/10406639508009627
https://doi.org/10.1080/10406639508009627
Autor:
M. Radke, H. Willsch
Publikováno v:
Geochimica et Cosmochimica Acta. 58:5223-5244
Extractable C{sub 0} to C{sub 2} dibenzothiophenes were determined by capillary gas chromatography in 125 rock samples of the Posidonia Shale formation with vitrinite reflectance (R{sub r}) between 0.4 and 1.5% mostly derived from the Hils syncline a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bad199f8b61c882b987b7d071a08d49
https://doi.org/10.1016/0016-7037(94)90307-7
https://doi.org/10.1016/0016-7037(94)90307-7
Publikováno v:
Journal of Chromatography A. 627:227-239
The retention indices for the 30 C 2 phenanthrenes and 33 trimethylphenanthrenes were determined by gas chromatography on a smectic liquid crystalline phase. The retention behaviour of these alkylated phenanthrenes was related to molecular shape cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c064488dbd3f9adbb09610594bd9e76
https://doi.org/10.1016/0021-9673(92)87202-j
https://doi.org/10.1016/0021-9673(92)87202-j
Publikováno v:
Organic Geochemistry. 18:447-455
A study to determine whether supercritical fluid extraction can replace liquid extraction of source rocks has been initiated. The extractions have been performed with plain carbon dioxide, with small amounts of 2-propanol mixed with carbon dioxide an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a08dce910649746b44521cab10e83300
https://doi.org/10.1016/0146-6380(92)90107-9
https://doi.org/10.1016/0146-6380(92)90107-9
Publikováno v:
Chemical Geology. 93:325-341
Distributions of alkylated naphthalenes, phenanthrenes, and dibenzothiophenes and of selected non-alkylated (parent) tri- and tetra-aromatic compounds were determined by capillary gas chromatography in extractable aromatic hydrocarbon fractions from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61d80bf65e3466ecdc6773fea40cf866
https://doi.org/10.1016/0009-2541(91)90122-8
https://doi.org/10.1016/0009-2541(91)90122-8
Publikováno v:
Organic Geochemistry. 15:17-34
Twenty-three C1- to C3-napthalenes and seventeen C1- and C2-phenanthrenes have been determined in six crude oils from the Handil field. Tentative identifications of individual C2-phenanthrene isomers based on gas chromatographic-mass spectrometric (G
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::788b49aaeead1064a9c0ce57039a7dd7
https://doi.org/10.1016/0146-6380(90)90182-y
https://doi.org/10.1016/0146-6380(90)90182-y
Publikováno v:
Chromatographia. 26:259-266
Two methyldibenzofuran isomers and a tetramethylnaphthalene isomer have been isolated from the organic extract of a Sakoa (southwest Madagascar) coal and were positively identified by IR spectroscopy. The isolation procedures were carried out on a se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::661c4f53058de4194ba4238301cec78b
https://doi.org/10.1007/bf02268164
https://doi.org/10.1007/bf02268164
Publikováno v:
Journal of Chromatography A
Journal of Chromatography A, Elsevier, 1987, 395 (C), pp.217--228. ⟨10.1016/S0021-9673(01)94112-3⟩
Journal of Chromatography A, Elsevier, 1987, 395 (C), pp.217--228. ⟨10.1016/S0021-9673(01)94112-3⟩
The combination of three high-performance liquid chromatographic steps performed on shale and coal extracts allows the collection of subfractions containing one to three C2-phenanthrene isomers. The identification was made by comparison with retentio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5d6fdc253f000e0c8d5365b505fa1c9
https://doi.org/10.1016/s0021-9673(01)94112-3
https://doi.org/10.1016/s0021-9673(01)94112-3