Wolkenstein, Klaus

[["dc.bibliographiccitation.firstpage","451"],["dc.bibliographiccitation.issue","1585"],["dc.bibliographiccitation.journal","Proceedings of the Royal Society of London. Series B, Biological Sciences"],["dc.bibliographiccitation.lastpage","456"],["dc.bibliographiccitation.volume","273"],["dc.contributor.author","Wolkenstein, Klaus"],["dc.contributor.author","Gross, Jürgen H."],["dc.contributor.author","Falk, Heinz"],["dc.contributor.author","Schöler, Heinz F."],["dc.date.accessioned","2020-08-04T09:06:45Z"],["dc.date.available","2020-08-04T09:06:45Z"],["dc.date.issued","2006"],["dc.description.abstract","The fringelite pigments, a group ofphenanthroperylene quinones discovered in purple coloured specimens of the Upper Jurassic crinoid Liliocrinus, demonstrate exceptional preservation of organic compounds in macrofossils. Here we report the finding of hypericin and related phenanthroperylene quinones in Liliocrinus munsterianus from the original 'Fringeli' locality and in the Middle Triassic crinoid Carnallicrinus carnalli. Our results show that fringelites in fact consist ofhypericin and closely related derivatives and that the stratigraphic range of phenanthroperylene quinones is much wider than previously known. The fossil occurrence of hypericin indicates a polyketide biosynthesis of hypericin-type pigments in Mesozoic crinoids analogous to similar polyketides, which occur in living crinoids. The common presence of a characteristic distribution pattern of the fossil pigments and related polycyclic aromatic hydrocarbons further suggests that this assemblage is the result of a stepwise degradation of hypericin via a general diagenetic pathway."],["dc.identifier.doi","10.1098/rspb.2005.3358"],["dc.identifier.pmid","16615212"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67524"],["dc.language.iso","en"],["dc.relation.issn","0962-8452"],["dc.title","Preservation of hypericin and related polycyclic quinone pigments in fossil crinoids"],["dc.type","journal_article"],["dc.type.internalPublication","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.lastpage","126"],["dc.contributor.author","Falk, Heinz"],["dc.contributor.author","Wolkenstein, Klaus"],["dc.contributor.editor","Kinghorn, A. D."],["dc.contributor.editor","Falk, H."],["dc.contributor.editor","Gibbons, S."],["dc.contributor.editor","Kobayashi, J."],["dc.date.accessioned","2020-08-04T08:51:34Z"],["dc.date.available","2020-08-04T08:51:34Z"],["dc.date.issued","2017"],["dc.description.abstract","The natural products synthesized by organisms that were living a long time ago gave rise to their molecular fossils. These can consist of either the original unchanged compounds or they may undergo peripheral transformations in which their skeletons remain intact. In cases when molecular fossils can be traced to their organismic source, they are termed \"geological biomarkers\".This contribution describes apolar and polar molecular fossils and, in particular biomarkers, along the lines usually followed in organic chemistry textbooks, and points to their bioprecursors when available. Thus, the apolar compounds are divided in linear and branched alkanes followed by alicyclic compounds and aromatic and heterocyclic molecules, and, in particular, the geoporphyrins. The polar molecular fossils contain as functional groups or constituent units ethers, alcohols, phenols, carbonyl groups, flavonoids, quinones, and acids, or are polymers like kerogen, amber, melanin, proteins, or nucleic acids. The final sections discuss the methodology used and the fundamental processes encountered by the biomolecules described, including diagenesis, catagenesis, and metagenesis."],["dc.identifier.doi","10.1007/978-3-319-45618-8_1"],["dc.identifier.pmid","28160211"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67518"],["dc.language.iso","en"],["dc.publisher","Springer"],["dc.publisher.place","Cham"],["dc.relation.doi","10.1007/978-3-319-45618-8"],["dc.relation.eisbn","978-3-319-45618-8"],["dc.relation.isbn","978-3-319-45616-4"],["dc.relation.ispartof","Progress in the Chemistry of Organic Natural Products"],["dc.relation.orgunit","Abteilung Geobiologie"],["dc.title","Natural Product Molecular Fossils"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","19374"],["dc.bibliographiccitation.issue","45"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences of the United States of America"],["dc.bibliographiccitation.lastpage","19378"],["dc.bibliographiccitation.volume","107"],["dc.contributor.author","Wolkenstein, Klaus"],["dc.contributor.author","Gross, Jürgen H."],["dc.contributor.author","Falk, Heinz"],["dc.date.accessioned","2020-08-04T09:01:51Z"],["dc.date.available","2020-08-04T09:01:51Z"],["dc.date.issued","2010"],["dc.description.abstract","Organic biomolecules that have retained their basic chemical structures over geological periods (molecular fossils) occur in a wide range of geological samples and provide valuable paleobiological, paleoenvironmental, and geochemical information not attainable from other sources. In rare cases, such compounds are even preserved with their specific functional groups and still occur within the organisms that produced them, providing direct information on the biochemical inventory of extinct organisms and their possible evolutionary relationships. Here we report the discovery of an exceptional group of boron-containing compounds, the borolithochromes, causing the distinct pink coloration of well-preserved specimens of the Jurassic red alga Solenopora jurassica. The borolithochromes are characterized as complicated spiroborates (boric acid esters) with two phenolic moieties as boron ligands, representing a unique class of fossil organic pigments. The chiroptical properties of the pigments unequivocally demonstrate a biogenic origin, at least of their ligands. However, although the borolithochromes originated from a fossil red alga, no analogy with hitherto known present-day red algal pigments was found. The occurrence of the borolithochromes or their possible diagenetic products in the fossil record may provide additional information on the classification and phylogeny of fossil calcareous algae."],["dc.identifier.doi","10.1073/pnas.1007973107"],["dc.identifier.pmid","20974956"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67521"],["dc.language.iso","en"],["dc.relation.eissn","1091-6490"],["dc.relation.issn","0027-8424"],["dc.title","Boron-containing organic pigments from a Jurassic red alga"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","517"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Nachrichten aus der Chemie"],["dc.bibliographiccitation.lastpage","520"],["dc.bibliographiccitation.volume","59"],["dc.contributor.author","Falk, Heinz"],["dc.contributor.author","Wolkenstein, Klaus"],["dc.date.accessioned","2020-08-04T09:00:04Z"],["dc.date.available","2020-08-04T09:00:04Z"],["dc.date.issued","2011"],["dc.description.abstract","Definierte organische Moleküle in Sedimenten und sogar Fossilien sind durchaus verbreitet: Sie sind Biomarker, die ein Fenster in urzeitliche Lebenswelten öffnen."],["dc.identifier.doi","10.1002/nadc.201178412"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67520"],["dc.language.iso","de"],["dc.relation.issn","1439-9598"],["dc.title","Spuren des Lebens: Organische Verbindungen im Stein"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]