MALEIMIDES (1H-PYRROLE-2,5-DIONES) AS MOLECULAR INDICATORS OF ANOXYGENIC PHOTOSYNTHESIS IN ANCIENT WATER COLUMNS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Grice K. | |
dc.contributor.author | Gibbison R. | |
dc.contributor.author | Atkinson J.E. | |
dc.contributor.author | Schwark L. | |
dc.contributor.author | Eckardt C.B. | |
dc.contributor.author | Maxwell J.R. | |
dc.date.accessioned | 2020-11-22T04:13:20Z | |
dc.date.available | 2020-11-22T04:13:20Z | |
dc.date.issued | 1996 | |
dc.identifier | https://elibrary.ru/item.asp?id=490358 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1996, , 20, 3913-3924 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/19276 | |
dc.description.abstract | Maleimides (1H-pyrrole-2,5-diones), degradation products of photosynthetic tetrapyrrole pigments, have been found for the first time in the polar fraction of the solvent extracts of two marine sediments deposited in restricted basins: Kupferschiefer (Permian) and Serpiano shale (Mid-Triassic). GC and GC-MS analyses of the TBDMS (tertiary-butyldimethylsilyl) derivatives show a simple component distribution, dominated by Me Et maleimide, mainly of planktonic origin; Me n-Pr and Me i-Bu maleimides, present in low abundance, are thought on structural grounds to be derived from the bacteriochlorophylls c, d, or e of Chlorobiaceae (anoxygenic green sulfur bacteria). This is confirmed for Kupferschiefer by isotope ratio monitoring (irm) GCMS which shows them to be enriched in 13C as a result of their photosynthetic carbon assimilation, which takes place by the reversed tricarboxylic acid (TCA) cycle. The structurally more specific Me i-Bu maleimide is, however, slightly more enriched in13 C than Me n-Pr maleimide, suggesting that the latter is derived in part from reduction of the C3-acid substituent at C-17 of phytoplanktonic chlorophyll. These results provide evidence for the existence in both depositional settings of microbial communities containing Chlorobiaceae. In turn, this indicates that there must have been periods when the water column was highly stratified and anoxia extended into the zone of light penetration. | |
dc.subject | Permian | en |
dc.subject | Triassic | en |
dc.title | MALEIMIDES (1H-PYRROLE-2,5-DIONES) AS MOLECULAR INDICATORS OF ANOXYGENIC PHOTOSYNTHESIS IN ANCIENT WATER COLUMNS | |
dc.type | Статья | |
dc.subject.age | Paleozoic::Permian | en |
dc.subject.age | Mesozoic::Triassic | en |
dc.subject.age | Мезозой::Триасовая | ru |
dc.subject.age | Палеозой::Пермская | ru |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru