Results 251 to 260 of about 1,885,987 (306)

Mercury at the Dawn of a New Exploration Phase. [PDF]

open access: yesNat Commun
Del Vecchio E   +2 more
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Isotopes in Organic Geochemistry

Fundamentals in Organic Geochemistry
Branimir Jovancicevic   +1 more
exaly   +3 more sources

Organic Geochemistry Of Biomarkers

Annual Review of Earth and Planetary Sciences, 1987
The classic organic chemical studies by the German chemist Alfred Treibs on the structures of tetrapyrrole-type compounds in crude oils led him to propose a biological origin for crude oils (Treibs 1934, 1 936). Treibs based his proposal on structural determinations, made by classical chemical methods, of porphyrins (I) in the oils and their structural
R P Philp, C A Lewis
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Immunology and organic geochemistry

Organic Geochemistry, 1984
Abstract Two “conventional” antibody preparations directedn against fractions of soluble macromolecules from shells of the recent bivalve Ensis ensis were allowed to react with shell fragments of a large variety of invertebrates, mainly molluscs. Use was made of a special adaptation of the Enzyme-Linked ImmunoSorbent Assay (ELISA).
G. Muyzer   +7 more
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The organic geochemistry of petroleum

Earth-Science Reviews, 1966
Abstract Organic geochemistry is principally concerned with the composition and mode of origin of organic matter in rocks and in bodies of water. There has been intensive study of petroleum and the rocks with which it is associated. Over 230 hydrocarbons, 50 oxygen compounds, nearly 100 sulphur compounds and more than 30 nitrogen compounds have been ...
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Advances in Organic Geochemistry

Russian Chemical Reviews, 1970
Two research fields embraced by the concept "organic geochemistry" are discussed. The first includes works on the abiogenic formation of organic compounds and the second deals with studies on the phenomena involving the formation and transformations of fossil organic matter and its importance in geochemical processes.
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Molecular Organic Geochemistry

1982
Organic geochemistry can be characterized as a field of science which studies the “fate” of organic compounds in sediments. In its earlier days research efforts were limited — from sheer lack of other possibilities — to the determination of bulk characteristics as for instance contents of organic carbon, nitrogen, hydrogen and percentage of organic ...
P. A. Schenck, J. W. de Leeuw
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