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Titlebook: New Trends in Coal Science; Yuda Yürüm Book 1988 Kluwer Academic Publishers 1988 Photochemistry.catalysis.chemistry.combustion.extraction

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樓主: Clique
21#
發(fā)表于 2025-3-25 06:09:10 | 只看該作者
Aral Olcaybetroffenen Personen- und BerufsgruppenMit dem Universit?tsstudiengesetz von 1997 sind die Weichen für eine umfassende und tiefgreifende Reform der Studien an den ?sterreichischen Universit?ten gestellt worden. Das Gesetz begnügt sich mit der Vorgabe von Rahmenbedingungen und überl??t die n?here Reg
22#
發(fā)表于 2025-3-25 10:21:17 | 只看該作者
Aral Olcay?ten gestellt worden. Das Gesetz begnügt sich mit der Vorgabe von Rahmenbedingungen und überl??t die n?here Regelung des Studienrechts den Studienpl?nen, die auf der Ebene der Universit?ten und Fakult?ten autonom zu beschlie?en sind. Künftig k?nnen der Aufbau und Inhalt desselben Studiums von Univer
23#
發(fā)表于 2025-3-25 14:32:35 | 只看該作者
24#
發(fā)表于 2025-3-25 18:44:27 | 只看該作者
The Origin of Coalsor marsh. Coal formation has been a rare event in geological time, the principal eras in Europe and North America having been about 300 m. and 50–100m. years B.P. Major changes in plant anatomy took place between these two periods..The results of a recent multi-disciplinary study of profiles of five
25#
發(fā)表于 2025-3-25 23:52:23 | 只看該作者
The Nature and Origins of Coal Maceralsinite maceral groups are discussed and compared to the corresponding liptinite macerals. The importance of separating macerals is considered, and some recent results using the density gradient centrifugation method of maceral separation is briefly reviewed. It is demonstrated that vitrinites are com
26#
發(fā)表于 2025-3-26 03:22:55 | 只看該作者
Solid State 13C NMR in Coal Research: Selected Techniques and Applicationgic-angle spinning with high-power decoupling, dipolar dephasing, sideband suppression at high magnetic fields, dynamic nuclear polarization and combined rotation and multiple pulse spectroscopy. The quantitative reliability of .C NMR aromaticity measurements is also discussed. Results from recent s
27#
發(fā)表于 2025-3-26 05:52:33 | 只看該作者
A New Approach for Quantitative 13C NMR Spectroscopy of Coalopy of coals and the use of samarium(II) iodide as a reagent for the realization of more quantitative spectroscopic results through the selective removal of organic free radicals from coal are discussed.
28#
發(fā)表于 2025-3-26 10:20:35 | 只看該作者
29#
發(fā)表于 2025-3-26 15:09:28 | 只看該作者
Estimating Thermophysical Properties of Coal Liquids Using NMR Spectraters, average molecular structures and functional group concentrations can all be calculated based on NMR data. The NMR data can find much broader application, however, than merely characterizing structure. This paper reviews some of the basic methods for applying NMR to the problem of property esti
30#
發(fā)表于 2025-3-26 18:18:53 | 只看該作者
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