Browsing Геология России by Author "Abbott G.D."

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MOLECULAR CHARACTERIZATION OF SOME ENIGMATIC LOWER DEVONIAN FOSSILS - SOME ANSWERS, MORE QUESTIONS

Abbott G.D.; Ewbank G.; Edwards D.; Wang G.Y. (1998)

The coalified remains of three extinct nonvascular Lower Devonian plants (Prototaxites Dawson, Pachytheca Hooker, and Parka Fleming) have been analysed using flash pyrolysis-gas chromatography-mass spectrometry, FTIR, and ...
THE CLOSED SYSTEM PYROLYSIS OF β-O-4 LIGNIN SUBSTRUCTURE MODEL COMPOUNDS

Drage T.C.; Vane C.H.; Abbott G.D. (2002)

Lignin substructure model compounds having a β-O-4 linkage were synthesized. These were guaiacylglycerol-β-guaiacyl ether (GGE) and guaiacylglycerol-β-syringyl ether (GSE) which model guaiacyl and syringyl units respectively. ...
THE STEREOCHEMISTRY OF BOUND AND EXTRACTABLE PENTACYCLIC TRITERPENOIDS DURING CLOSED SYSTEM PYROLYSIS

Sugden M.A.; Abbott G.D. (2002)

The distributions of hopanoic acids, ranging from C30 to C34, in the Messel oil shale were characterized in both the free and bound states. The bound acids were released by thermochemolysis in the presence of tetramethylammonium ...
THE THERMAL DEGRADATION OF 5α(H)-CHOLESTANE DURING CLOSED-SYSTEM PYROLYSIS

Abbott G.D.; Bennett B.; Petch G.S. (1995)

Involatile hydrocarbons were identified following the heating of 5α(H)-cholestane in water with reaction vessel walls composed of 316 grade stainless steel and borosilicate glass. These analyses were compared with the ...

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