| Autor: |
Christopher M. Reddy, Richard B. Gaines, Carl G. Johnson, Robert K. Nelson, Timothy I. Eglinton, Glenn S. Frysinger, John W. Farrington, Li Xu |
| Rok vydání: |
2001 |
| Předmět: |
|
| Zdroj: |
Organic Geochemistry. 32:633-645 |
| ISSN: |
0146-6380 |
| DOI: |
10.1016/s0146-6380(01)00019-5 |
| Popis: |
We report the identification of a novel long-chain ketone in Holocene Black Sea sediments. Based on chemical properties, and chromatographic and mass spectrometric characteristics, this compound has been identified as a di-unsaturated C36 ethyl ketone. Further analyses indicated the position and configuration of the double bonds, and the novel alkenone was determined to be hexatriaconta-(16E,21E)-dien-3-one. While this compound is present in only trace quantities in Unit I sediments, it is the most abundant alkenone in portions of Unit II. Its presence thus apparently pre-dates the invasion of Emiliania huxleyi in the Black Sea. The down-core profiles and isotopic compositions suggest that the precursor for the C36:2 alkenone may be distinct from that of the C37-39 alkenones, however the biological origin of this novel compound is presently unknown. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect