Zobrazeno 1 - 10
of 267
pro vyhledávání: '"R.B. Johns"'
Autor:
R.B. Johns, William Roy Jackson, Geoffrey D. Bongers, Yi Fei, Antonio F. Patti, P.J. Redlich, G. Favas
Publikováno v:
International Journal of Coal Geology. 32:229-240
It has been proposed that Victorian brown coal can be considered as a two-component structure — a lignocellulosic “host”, containing various amounts of weakly bound or entrapped “guest” material together with very small amounts of inorganic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::454315abe9172d22cf08a024fbdf99b3
https://doi.org/10.1016/s0166-5162(96)00038-9
https://doi.org/10.1016/s0166-5162(96)00038-9
Publikováno v:
Journal of Analytical and Applied Pyrolysis. 20:151-159
Two Sydney Basin Bulli coals with differing coking properties are compared and characterised by thermal desorption and pyrolysis-GC/MS analyses. From the TD-GC/MS data a series of maturity indicators have been calculated and from the MPI-1 the calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7622a53cdd52df4168c769c7dc1933cd
https://doi.org/10.1016/0165-2370(91)80069-k
https://doi.org/10.1016/0165-2370(91)80069-k
Autor:
R.B. Johns, Maowen Li
Publikováno v:
Journal of Analytical and Applied Pyrolysis. 20:161-170
TD/GC/MS analyses of a profile of Victorian brown coal lithotypes are reported. Specifically, weight loss on TD, triterpenoid and diterpenoid hydrocarbons, and trimethylnaphthalene isomers are considered as lithotype differentiators. In this initial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e940e0203798e5a46fb6d32fe196bba2
https://doi.org/10.1016/0165-2370(91)80070-o
https://doi.org/10.1016/0165-2370(91)80070-o
Some diagenetic implications of the presence of hopanoid and other biomarkers in a Funan coaly shale
Autor:
Li Maowen, R.B. Johns
Publikováno v:
Journal of Southeast Asian Earth Sciences. 5:249-256
An interbedded coaly shale from the Funan Coal Mine in NE China has been analysed in detail for the biomarker components in the organic solvent extract. A range of higher plant, dinoflagellate and bacterial biomarkers was identified. The shale is ric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77b5e7859a2245dbefa0097aa65abc36
https://doi.org/10.1016/0743-9547(91)90033-t
https://doi.org/10.1016/0743-9547(91)90033-t
Autor:
R.B. Johns, Maowen Li
Publikováno v:
Journal of Analytical and Applied Pyrolysis. 18:41-58
Applications of the thermal desorption (TD) technique to a suite of immature coals are described. The thermal desorption temperature is defined as just below the temperature at which n -alkenes 21 appear in a gas chromatogram. TD and solvent extracts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecfdea9d6f83fd1ebf9da98f7ff9aade
https://doi.org/10.1016/0165-2370(90)85004-7
https://doi.org/10.1016/0165-2370(90)85004-7
Autor:
John K. Volkman, R.B. Johns
Publikováno v:
Organic Geochemistry. 21:v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c3fd50f87cf2dc43f3cf3276514b41a
https://doi.org/10.1016/0146-6380(94)90184-8
https://doi.org/10.1016/0146-6380(94)90184-8
Autor:
T.Vincent Verheyen, R.B. Johns, the late Richard L. Bryson, Gary E. Maciel, David T. Blackburn
Publikováno v:
Fuel. 63:1629-1635
Solid-state 13C n.m.r. and infrared spectroscopy were used to investigate the gross differences in chemical structural between the five primary lithotypes or coal bands present in Victorian brown coal seams. Examination of a series of coal lithotypes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7829f02b9d7a71e318e3ff9cc8ff9697
https://doi.org/10.1016/0016-2361(84)90090-5
https://doi.org/10.1016/0016-2361(84)90090-5
Publikováno v:
Geochimica et Cosmochimica Acta. 44:183-188
Analysis of a sediment core for hydrolysed chlorins (acidic chlorins e.g. pheophorbide a) and non-acidic chlorins, and free, bound and esterified alcohols have been performed and the results have been interpreted in terms of input and sedimentary int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f39d83f6007db6ed9c165da118c85551
https://doi.org/10.1016/0016-7037(80)90130-1
https://doi.org/10.1016/0016-7037(80)90130-1
Publikováno v:
Organic Geochemistry. 6:409-416
Infrared and CP-MAS 13 C-NMR Spectroscopy, Py-GC-MS and Py-MS techniques have been applied to samples of the five main lithotypes occurring in the Latrobe Valley brown coal deposits in Victoria, Australia. The analyses are compared with data from sam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc6bf0107787e4bd485954a1c5eb15c3
https://doi.org/10.1016/0146-6380(84)90063-9
https://doi.org/10.1016/0146-6380(84)90063-9
Autor:
R.B. Johns, Peter D. Nichols
Publikováno v:
Phytochemistry. 24:81-84
The component sterols, alcohols, hydrocarbons, monocarboxylic, α,ω-dicarboxylic and α- and ω-hydroxy acids from the leaves and roots of the tropical seagrass Thallassia hemprichii are reported. The leaves contained significant concentrations of c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f86a4a61055dc3af6f1b9a719da8c42
https://doi.org/10.1016/s0031-9422(00)80811-0
https://doi.org/10.1016/s0031-9422(00)80811-0