Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Klaus Wolkenstein"'
Publikováno v:
Frontiers in Zoology, Vol 16, Iss 1, Pp 1-9 (2019)
Abstract Background The geometric patterns that adorn the shells of many phylogenetically disparate molluscan species are comprised of pigments that span the visible spectrum. Although early chemical studies implicated melanin as a commonly employed
Externí odkaz:
https://doaj.org/article/b96bffd67a4146378075feadb3f95661
Autor:
Lennart M. van Maldegem, Pierre Sansjofre, Johan W. H. Weijers, Klaus Wolkenstein, Paul K. Strother, Lars Wörmer, Jens Hefter, Benjamin J. Nettersheim, Yosuke Hoshino, Stefan Schouten, Jaap S. Sinninghe Damsté, Nilamoni Nath, Christian Griesinger, Nikolay B. Kuznetsov, Marcel Elie, Marcus Elvert, Erik Tegelaar, Gerd Gleixner, Christian Hallmann
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-11 (2019)
It remains unclear when and why the world’s oceans, once largely occupied by bacteria, became dominated by photosynthetic algae. Here, using fossil lipids in million year old rocks, the authors show that predation after the Snowball Earth glaciatio
Externí odkaz:
https://doaj.org/article/9bcf0c41c5b843749aff5a4532331548
Autor:
Sahithya Phani Babu Vemulapalli, Juan Carlos Fuentes-Monteverde, Niels Karschin, Tatsuo Oji, Christian Griesinger, Klaus Wolkenstein
Publikováno v:
Marine Drugs, Vol 19, Iss 8, p 445 (2021)
Two new water-soluble phenanthroperylene quinones, gymnochrome H (2) and monosulfated gymnochrome A (3), as well as the known compounds gymnochrome A (4) and monosulfated gymnochrome D (5) were isolated from the deep-sea crinoid Hypalocrinus naresian
Externí odkaz:
https://doaj.org/article/27ad34cd52854c07970ce26976af2919
Publikováno v:
PLoS ONE, Vol 14, Iss 10, p e0223552 (2019)
Eumelanin and pheomelanin are well known and common pigments found in nature. However, their complex polymer structure and high thermostability complicate their direct chemical identification. A widely used analytical method is indirect determination
Externí odkaz:
https://doaj.org/article/00bc5a218e3a4707bf576abd5cb05523
Polyene pigments represent a major class of pigments in present-day organisms. Their occurrence in fossils has been frequently discussed, but to date no spectroscopic evidence was found. Here, we usein situRaman microspectroscopy to examine the chemi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1df18ece17983b27470255dfa8115725
https://doi.org/10.1101/2023.05.17.541181
https://doi.org/10.1101/2023.05.17.541181
Autor:
Gernot Arp, Klaus Wolkenstein
Publikováno v:
PalZ. 95:747-756
UV-light-induced fluorescence is widely used in the study of coal macerals and palynological samples, but to date has not been described in great detail for plant macrofossils. Here, we report the characteristics of bright UV-light-induced fluorescen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b03c7e7097993f5bf3ca1b44a44abbf3
https://doi.org/10.1007/s12542-020-00538-3
https://doi.org/10.1007/s12542-020-00538-3
Publikováno v:
Angewandte Chemie. 132:15994-15998
Anisotropic NMR has gained increasing popularity to determine the structure and specifically the configuration of small, flexible, non-crystallizable molecules. However, it suffers from the necessity to dissolve the analyte in special media such as l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4afeee958af9be4d64d8a89d401a545b
https://doi.org/10.1002/ange.202004881
https://doi.org/10.1002/ange.202004881
Autor:
Juan Carlos Fuentes-Monteverde, Christian Griesinger, Klaus Wolkenstein, Nilamoni Nath, Tatsuo Oji
Publikováno v:
Journal of Natural Products
Five new water-soluble amido- and aminoanthraquinone pigments, hypalocrinins A-E (1-5), the new amidoanthraquinone biaryls hypalocrinin F (6) and hypalocrinin G (7), and the known compounds 6-bromoemodic acid (8), crinemodin (9), and crinemodin sulfa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::896df3b764f591abb9bf190bdbcd9f30
https://doi.org/10.1021/acs.jnatprod.8b00803
https://doi.org/10.1021/acs.jnatprod.8b00803
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Scientific Reports
Scientific Reports
The common grove snail Cepaea nemoralis displays a stable pigmentation polymorphism in its shell that has held the attention of scientists for decades. While the details of the molecular mechanisms that generate and maintain this diversity remain elu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d70cdd435d0a31549eebaaf9e022719d
https://doi.org/10.1038/s41598-020-59185-y
https://doi.org/10.1038/s41598-020-59185-y
Autor:
Klaus Wolkenstein
Publikováno v:
Monatshefte für Chemie - Chemical Monthly. 150:759-761
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::564c6229b039b9e12cd4af59ade4c81c
https://doi.org/10.1007/s00706-019-2369-1
https://doi.org/10.1007/s00706-019-2369-1