Incluye bibliografía e índice: páginas 239-250

1. Introduction.. 2. General characteristics of petroleum hydrocarbons molecular and group-type methods of analysis and classification.. 3. C5-C40 alkanes.. 4. Cycloalkanes (naphthenes.. 5. Aromatic hydrocarbons (arenes.. 6. Sources and reactions of petroleum hydrocarbon formation.. 7. Transformations of petroleum hydrocarbons in nature (chemical and biochemical alteration of crude oils.. 8. Conclusion venues of further research on petroleum hydrocarbon composition and structure.. Subject Index

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Analyses data on the composition, structure and formation of various petroleum hydrocarbons: the alkanes, cycloalkanes and arenes. Attention is paid to biological markers, com- pounds that may have preserved the main structural features of the original biogenic molecules. Concepts of chemical classification of crude oils are reviewed with respect to the molecular mass distribution of biological markers, and the genesis and chemical evolution of petroleum hydrocarbons are discussed. Inglés

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