Abteilung Sedimentologie und Umweltgeologie

[["dc.bibliographiccitation.firstpage","686"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Zeitschrift für Naturforschung B"],["dc.bibliographiccitation.lastpage","691"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Maskey, Rajendra P."],["dc.contributor.author","Asolkar, R. N."],["dc.contributor.author","Speitling, M."],["dc.contributor.author","Hoffmann, V."],["dc.contributor.author","Grun-Wollny, I."],["dc.contributor.author","Felck, W. F."],["dc.contributor.author","Laatsch, Hartmut"],["dc.date.accessioned","2018-11-07T10:38:12Z"],["dc.date.available","2018-11-07T10:38:12Z"],["dc.date.issued","2003"],["dc.description.abstract","In the course of our chemical screening of actinomycetes and other bacteria from terrestrial and marine sources, several extracts showed colourless middle polar bands with strong UV absorption at 254 nm and brown to grey colouration with anisaldehyde/sulphuric acid. Working-up of such strains led to the isolation of a number of isoflavonoids. Daidzein (1a) and genistein (1b) are very wide-spread, however, compounds like kakkatin (2b, Streptomyces sp. GW39/1530) were known only from plant sources. Additionally, three new isoflavonoids were obtained, namely 4',7-bis-(beta-cymaropyranosyl)-genistein (1e) and 4'-hydroxy-6,7-methoxyisoflavone (2c) from the actinomycete isolate HKI 129-L, and genistein-4'-(6\"-methyl)-salicylate (1d) from Streptomyces sp. isolate GW27/2506. 1d is the first natural 4'-ester of an isoflavonoid and an aromatic acid. For the first time, also two flavonoids were isolated from bacteria, apigenin (5a) and luteolin-3'-methyl ether (5b)."],["dc.identifier.isi","000185146400013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45755"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Verlag Z Naturforsch"],["dc.relation.issn","0932-0776"],["dc.title","Flavones and new isoflavone derivatives from microorganisms: Isolation and structure elucidation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","935"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Solid Earth"],["dc.bibliographiccitation.lastpage","958"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Kley, Jonas"],["dc.contributor.author","Dunkl, István"],["dc.contributor.author","Hoffmann, Veit-Enno"],["dc.contributor.author","Simon, Annemarie"],["dc.date.accessioned","2021-06-01T09:42:44Z"],["dc.date.available","2021-06-01T09:42:44Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract. Large parts of central Europe experienced exhumation in Late Cretaceous to Paleogene time. Previous studies mainly focused on thrusted basement uplifts to unravel the magnitude, processes and timing of exhumation. This study provides, for the first time, a comprehensive thermochronological dataset from mostly Permo-Triassic strata exposed adjacent to and between the basement uplifts in central Germany, comprising an area of at least some 250–300 km across. Results of apatite fission-track and (U–Th) / He analyses on > 100 new samples reveal that (i) kilometre-scale exhumation affected the entire region, (ii) thrusting of basement blocks like the Harz Mountains and the Thuringian Forest focused in the Late Cretaceous (about 90–70 Ma), while superimposed domal uplift of central Germany is slightly younger (about 75–55 Ma), and (iii) large parts of the domal uplift experienced removal of 3 to 4 km of Mesozoic strata. Using spatial extent, magnitude and timing as constraints suggests that thrusting and crustal thickening alone can account for no more than half of the domal uplift. Most likely, dynamic topography caused by upwelling asthenosphere significantly contributed to the observed pattern of exhumation in central Germany."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.5194/se-12-935-2021"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85337"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1869-9529"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.rights","CC BY 4.0"],["dc.title","Late Cretaceous to Paleogene exhumation in central Europe – localized inversion vs. large-scale domal uplift"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","419"],["dc.bibliographiccitation.issue","1-4"],["dc.bibliographiccitation.journal","Facies"],["dc.bibliographiccitation.lastpage","441"],["dc.bibliographiccitation.volume","51"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Bielert, Friedrich"],["dc.contributor.author","Hoffmann, Veit-Enno"],["dc.contributor.author","Löffler, Thomas"],["dc.date.accessioned","2018-11-07T10:54:37Z"],["dc.date.available","2018-11-07T10:54:37Z"],["dc.date.issued","2005"],["dc.description.abstract","Lacustrine stromatolites of the Norian Arnstadt Formation (\"Steinmergelkeuper\") occur on top of asymmetric flooding-evaporation cycles of a closed lake basin. They have been investigated with regard to associated litho-facies and biota, microfabric and stable carbon and oxygen isotopes. The stromatolites of the \"Middle Grey Series\" are brecciated and reworked by a flooding event of a subsequent lake cycle. They comprise agglutinated stromatolites rich in fish scales as well as skeletal stromatolites composed of a rhythmically grown dendroid micropeloidal framework. The latter are characterized by a shift towards positive delta(13)C values relative to the associated lake carbonates. This points to an effective photosynthesis in biofilm calcification at low concentrations in dissolved inorganic carbon (DIC) in a perennial fresh to brackish water lake. The stromatolites of the \"Upper Red Series\" occur on top of perennial lake cycles intercalated between playa lake deposits. The fine-grained stromatolites are poor in microfabric characteristics but show a significant covariation of delta(18)O and delta(13C). This points to evaporation/degassing acting as driving mechanism in biofilm calcification. The lack of biotic effects on carbon isotope fractionation may reflect high concentrations in dissolved inorganic carbon. Skeletal oncoids, which occur as allochthonous components within an intraformational lag deposit of the \"Upper Red Series\", are composed of cyanobacterial tubes and probably represent lowest saline lakes with only poor DIC buffering. Stable isotope signatures in conjunction with stromatolite microfabric analyses may be used as a proxy of DIC concentrations in ancient closed lakes."],["dc.identifier.doi","10.1007/s10347-005-0063-8"],["dc.identifier.isi","000235005200031"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49606"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","0172-9179"],["dc.title","Palaeoenvironmental significance of lacustrine stromatolites of the Arnstadt Formation (\"Steinmergelkeuper\", Upper Triassic, N-Germany)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","19151"],["dc.bibliographiccitation.issue","21"],["dc.bibliographiccitation.journal","Journal of Biological Chemistry"],["dc.bibliographiccitation.lastpage","19158"],["dc.bibliographiccitation.volume","278"],["dc.contributor.author","Lodge, J. Peter A."],["dc.contributor.author","Maier, T."],["dc.contributor.author","Liebl, Wolfgang"],["dc.contributor.author","Hoffmann, V."],["dc.contributor.author","Strater, N."],["dc.date.accessioned","2018-11-07T10:38:53Z"],["dc.date.available","2018-11-07T10:38:53Z"],["dc.date.issued","2003"],["dc.description.abstract","Glycoside hydrolase family 4 represents an unusual group of glucosidases with a requirement for NAD(+), divalent metal cations, and reducing conditions. The family is also unique in its inclusion of both alpha- and beta-specific enzymes. The alpha-glucosidase A, AglA, from Thermotoga maritima is a typical glycoside hydrolase family 4 enzyme, requiring NAD(+) and Mn2+ as well as strongly reducing conditions for activity. Here we present the crystal structure of the protein complexed with NAD(+) and maltose, refined at a resolution of 1.9 Angstrom. The NAD(+) is bound to a typical Rossman fold NAD(+)-binding site, and the nicotinamide moiety is localized close to the maltose substrate. Within the active site the conserved Cys-174 and surrounding histidines are positioned to play a role in the hydrolysis reaction. The electron density maps indicate that Cys-174 is oxidized to a sulfinic acid. Most likely, the strongly reducing conditions are necessary to reduce the oxidized cysteine side chain. Notably, the canonical set of catalytic acidic residues common to other glucosidases is not present in the active site. This, combined with a high structural homology to NAD-dependent dehydrogenases, suggests an unusual and possibly unique mechanism of action for a glycoside-hydrolyzing enzyme."],["dc.identifier.doi","10.1074/jbc.M211626200"],["dc.identifier.isi","000182932200057"],["dc.identifier.pmid","12588867"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45915"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Soc Biochemistry Molecular Biology Inc"],["dc.relation.issn","0021-9258"],["dc.title","Crystal structure of Thermotoga maritima alpha-glucosidase AglA defines a new clan of NAD(+)-dependent glycosidases"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Bauermeister, Jan"],["dc.contributor.author","Volk, H."],["dc.contributor.author","Fuentes, David"],["dc.contributor.author","Gong, S."],["dc.contributor.author","Leefmann, Tim"],["dc.contributor.author","Hoffmann, V.-E."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Thiel, Volker"],["dc.date.accessioned","2018-11-07T08:29:11Z"],["dc.date.available","2018-11-07T08:29:11Z"],["dc.date.issued","2009"],["dc.identifier.isi","000267229900202"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16588"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","19th Annual VM Goldschmidt Conference"],["dc.relation.eventlocation","Davos, SWITZERLAND"],["dc.title","Laser micropyrolysis-GC/MS of biomarkers in authigenic carbonates"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","170"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","British Journal of Dermatology"],["dc.bibliographiccitation.lastpage","176"],["dc.bibliographiccitation.volume","160"],["dc.contributor.author","van de Kerkhof, Peter C. M."],["dc.contributor.author","Hoffmann, V."],["dc.contributor.author","Anstey, A."],["dc.contributor.author","Barnes, L."],["dc.contributor.author","Bolduc, C."],["dc.contributor.author","Reich, Kristian"],["dc.contributor.author","Saari, S."],["dc.contributor.author","Segaert, S."],["dc.contributor.author","Vaillant, L."],["dc.date.accessioned","2018-11-07T08:33:58Z"],["dc.date.available","2018-11-07T08:33:58Z"],["dc.date.issued","2009"],["dc.description.abstract","There is a need for new treatments for scalp psoriasis, as many topical treatments are cosmetically unacceptable and difficult to apply, resulting in poor compliance. To compare the efficacy and safety of a new, once-daily, two-compound scalp formulation (Xamiol((R)); LEO Pharma A/S, Ballerup, Denmark) containing calcipotriol 50 mu g g(-1) plus betamethasone 0.5 mg g(-1) (as dipropionate), with the active ingredients as single compounds in the same vehicle. This 8-week, multicentre, double-blind, parallel-group study, randomized adult patients with scalp psoriasis involving > 10% of the scalp to the two-compound scalp formulation (n = 568), betamethasone dipropionate 0.5 mg g(-1) (n = 563), or calcipotriol 50 mu g g(-1) (n = 286). The primary efficacy measure was the proportion of patients with 'absence of disease' or 'very mild disease' according to investigators' assessments at week 8. The proportion of patients with 'absence of disease' or 'very mild disease' at week 8 was significantly higher in the two-compound group (68.4%) than the betamethasone dipropionate (61.0%, P = 0.0079) or calcipotriol (43.4%, P < 0.0001) groups. The proportion of patients rating their scalp psoriasis as 'clear' or 'almost clear' was significantly higher for the two-compound scalp formulation (69.6%) than for betamethasone dipropionate (59.9%, P = 0.0006) or calcipotriol (44.7%, P < 0.0001). The incidence of lesional/perilesional adverse events was lower in the two-compound and betamethasone dipropionate groups than the calcipotriol group. The two-compound scalp formulation was well tolerated and more effective in the treatment of scalp psoriasis than either of its individual components in the same vehicle."],["dc.description.sponsorship","LEO Pharma A/S, Ballerup, Denmark"],["dc.identifier.doi","10.1111/j.1365-2133.2008.08927.x"],["dc.identifier.isi","000261710800024"],["dc.identifier.pmid","19067709"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17708"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell Publishing, Inc"],["dc.relation.issn","0007-0963"],["dc.title","A new scalp formulation of calcipotriol plus betamethasone dipropionate compared with each of its active ingredients in the same vehicle for the treatment of scalp psoriasis: a randomized, double-blind, controlled trial"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","7"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Lethaia"],["dc.bibliographiccitation.lastpage","18"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Hagemann, Andrea"],["dc.contributor.author","Leefmann, Tim"],["dc.contributor.author","Peckmann, Joern"],["dc.contributor.author","Hoffmann, Veit-Enno"],["dc.contributor.author","Thiel, Volker"],["dc.date.accessioned","2018-11-07T09:30:48Z"],["dc.date.available","2018-11-07T09:30:48Z"],["dc.date.issued","2013"],["dc.description.abstract","An Oligocene cold-seep limestone (Lincoln Creek Formation, Washington State, USA) was studied for its lipid biomarker inventory. Biomarker analysis on minute amounts of sample (tens of mg) and complementary C-13(carbonate) analyses allowed us to link biogeochemical processes with individual, closely intertwined carbonate phases. The ancient seep deposit exhibits four major carbonate phases, according to the paragenetic sequence of (I) micrite, (II) yellow aragonite, (III) clear aragonite and (IV) equant calcite spar. For the micrite, varying but significant amounts of archaea-derived isoprenoids clearly indicate that the precipitation of this phase was induced by the microbial anaerobic oxidation of methane (AOM). However, water column-derived lipids present in this carbonate phase reflect the incorporation of organic matter from background sediment cemented by authigenic micrite. Yellow aragonite made up only a minor rock component (<10% vol.), but contained a major portion of lipid biomarkers indicative of AOM. Along with low delta C-13(carbonate) values (less than -30 parts per thousand Pee Dee Belemnite), this points to an intimate spatial association of AOM consortia with the precipitation of yellow aragonite. Clear aragonite showed similar delta C-13(carbonate) values but much lower, if any, contents of AOM biomarkers. This suggests that AOM-derived carbonate ions diffused over a greater distance to the site of precipitation compared with yellow aragonite. The latest phase, equant calcite spar, did not yield appreciable biomarkers, but showed a notable C-13(carbonate)-enrichment that is most likely caused by methanogenesis that prevailed in the sediments after AOM activity had ceased. A comparison of the ancient seep carbonates with modern counterparts from Hydrate Ridge (offshore Oregon, USA) revealed a remarkable coincidence of the respective mineral phases and their biomarker patterns. This suggests that the mechanisms of carbonate formation and the associated biogeochemical processes remained unchanged over geological times."],["dc.identifier.doi","10.1111/j.1502-3931.2012.00316.x"],["dc.identifier.isi","000312650400002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31397"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","0024-1164"],["dc.title","Biomarkers from individual carbonate phases of an Oligocene cold-seep deposit, Washington State, USA"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2097"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Earth Sciences"],["dc.bibliographiccitation.lastpage","2111"],["dc.bibliographiccitation.volume","108"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Dunkl, István"],["dc.contributor.author","Brix, Manfred"],["dc.contributor.author","Hoffmann, Veit-Enno"],["dc.contributor.author","Raab, Matthias"],["dc.contributor.author","Thomson, Stuart Nigel"],["dc.contributor.author","Kohn, Barry"],["dc.date.accessioned","2020-12-10T14:10:49Z"],["dc.date.available","2020-12-10T14:10:49Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00531-019-01751-5"],["dc.identifier.eissn","1437-3262"],["dc.identifier.issn","1437-3254"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70888"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Late Cretaceous exhumation and uplift of the Harz Mountains, Germany: a multi-method thermochronological approach"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]