Schäfer, Nadine

[["dc.bibliographiccitation.firstpage","187"],["dc.bibliographiccitation.journal","Bone"],["dc.bibliographiccitation.lastpage","194"],["dc.bibliographiccitation.volume","64"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Komrakova, Marina"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Tezval, Mohammad"],["dc.contributor.author","Dullin, Christian"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Hallecker, Jan"],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.date.accessioned","2018-11-07T09:38:39Z"],["dc.date.available","2018-11-07T09:38:39Z"],["dc.date.issued","2014"],["dc.description.abstract","Current osteoporosis therapies aim to delay bone destruction and have additional anabolic effects. While they have demonstrated some positive effects on bone healing, more progress is needed in this area. This study used the well-known osteoporotic agents estrogen (E) and raloxifene (R) in conjunction with biomechanical whole body vibration (WBV) at a frequency of 70 Hz twice daily for six weeks to stimulate bone healing. Eighty-four 3-month old female Sprague-Dawley rats (12 per group) were bilaterally ovariectomized to develop osteopenia within eight weeks. Osteotomy of the metaphyseal tibiae was performed and fracture healing was then studied using mechanical tests, histomorphometry, computed tomography (mu CT), and gene analysis. We found that E and R improved the structure of osteopenic bones as did WBV alone, although significant levels for WBV were seldom reached. Combination treatments significantly enhanced stiffness (R + WBV; p < 0.05), endosteal bone (R + WBV; p < 0.01), and trabecular density (E + WBV; p < 0.05, R + WBV; p < 0.05). In addition, the expression of osteoclast-specific Trap was significantly reduced after treatment with E, R, or their combination with WBV (p < 0.01). The effects were additive and not inhibitory, leading us to conclude that the combined applications of WBV with E or R may improve the healing of osteopenic bones. The therapies studied are all currently approved for human use, suggesting ready applicability to clinical practice. To better understand the effects of WBV on osteopenic bones, the ideal vibration regime will require further study. (C) 2014 Elsevier Inc. All rights reserved."],["dc.description.sponsorship","German Research Foundation (DFG) [STU 478/3-1]"],["dc.identifier.doi","10.1016/j.bone.2014.04.008"],["dc.identifier.isi","337011500026"],["dc.identifier.pmid","24735975"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33112"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Inc"],["dc.relation.issn","1873-2763"],["dc.relation.issn","8756-3282"],["dc.title","Whole body vibration during fracture healing intensifies the effects of estradiol and raloxifene in estrogen-deficient rats"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","231"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Journal of Astrobiology"],["dc.bibliographiccitation.lastpage","238"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Giri, Chaitanya"],["dc.contributor.author","McKay, Christopher P."],["dc.contributor.author","Goesmann, Fred"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Li, Xiang"],["dc.contributor.author","Steininger, Harald"],["dc.contributor.author","Brinckerhoff, William B."],["dc.contributor.author","Gautier, Thomas N."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Meierhenrich, Uwe J."],["dc.date.accessioned","2018-11-07T10:11:57Z"],["dc.date.available","2018-11-07T10:11:57Z"],["dc.date.issued","2016"],["dc.description.abstract","Astronomical observations of Centaurs and trans-Neptunian objects (TNOs) yield two characteristic features - near-infrared (NIR) reflectance and low geometric albedo. The first feature apparently originates due to complex organic material on their surfaces, but the origin of the material contributing to low albedo is not well understood. Titan tholins synthesized to simulate aerosols in the atmosphere of Saturn's moon Titan have also been used for simulating the NIR reflectances of several Centaurs and TNOs. Here, we report novel detections of large polycyclic aromatic hydrocarbons, nanoscopic soot aggregates and cauliflower-like graphite within Titan tholins. We put forth a proof of concept stating the surfaces of Centaurs and TNOs may perhaps comprise of highly carbonized' complex organic material, analogous to the tholins we investigated. Such material would apparently be capable of contributing to the NIR reflectances and to the low geometric albedos simultaneously."],["dc.identifier.doi","10.1017/S1473550415000439"],["dc.identifier.isi","000381033400007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40144"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1475-3006"],["dc.relation.issn","1473-5504"],["dc.title","Carbonization in Titan Tholins: implication for low albedo on surfaces of Centaurs and trans-Neptunian objects"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","150"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","New Phytologist"],["dc.bibliographiccitation.lastpage","162"],["dc.bibliographiccitation.volume","216"],["dc.contributor.author","Müller, Heike M."],["dc.contributor.author","Schäfer, Nadine"],["dc.contributor.author","Bauer, Hubert"],["dc.contributor.author","Geiger, Dietmar"],["dc.contributor.author","Lautner, Silke"],["dc.contributor.author","Fromm, Jörg"],["dc.contributor.author","Riederer, Markus"],["dc.contributor.author","Bueno, Amauri"],["dc.contributor.author","Nussbaumer, Thomas"],["dc.contributor.author","Hedrich, Rainer"],["dc.date.accessioned","2021-06-01T10:47:26Z"],["dc.date.available","2021-06-01T10:47:26Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1111/nph.14672"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85603"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1469-8137"],["dc.relation.issn","0028-646X"],["dc.title","The desert plant Phoenix dactylifera closes stomata via nitrate‐regulated SLAC 1 anion channel"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","988"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","New Phytologist"],["dc.bibliographiccitation.lastpage","996"],["dc.bibliographiccitation.volume","192"],["dc.contributor.author","Beimforde, Christina"],["dc.contributor.author","Schäfer, Nadine"],["dc.contributor.author","Dörfelt, Heinrich"],["dc.contributor.author","Nascimbene, Paul C."],["dc.contributor.author","Singh, Hukam"],["dc.contributor.author","Heinrichs, Jochen"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Rana, Rajendra S."],["dc.contributor.author","Schmidt, Alexander R."],["dc.date.accessioned","2018-08-14T14:20:32Z"],["dc.date.available","2018-08-14T14:20:32Z"],["dc.date.issued","2011"],["dc.description.abstract","The development of mycorrhizal associations is considered a key innovation that enabled vascular plants to extensively colonize terrestrial habitats. Here, we present the first known fossil ectomycorrhizas from an angiosperm forest. Our fossils are preserved in a 52 million-yr-old piece of amber from the Tadkeshwar Lignite Mine of Gujarat State, western India. The amber was produced by representatives of Dipterocarpaceae in an early tropical broadleaf forest. The ectomycorrhizas were investigated using light microscopy and field emission scanning electron microscopy. Dissolving the amber surrounding one of the fossils allowed ultrastructural analyses and Raman spectroscopy. Approx. 20 unramified, cruciform and monopodial-pinnate ectomycorrhizas are fossilized adjacent to rootlets, and different developmental stages of the fossil mycorrhizas are delicately preserved in the ancient resin. Compounds of melanins were detectable in the dark hyphae. The mycobiont, Eomelanomyces cenococcoides gen. et spec. nov., is considered to be an ascomycete; the host is most likely a dipterocarp representative. An early ectomycorrhizal association may have conferred an evolutionary advantage on dipterocarps. Our find indicates that ectomycorrhizas occurred contemporaneously within both gymnosperms (Pinaceae) and angiosperms (Dipterocarpaceae) by the Lower Eocene."],["dc.identifier.doi","10.1111/j.1469-8137.2011.03868.x"],["dc.identifier.pmid","22074339"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15290"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1469-8137"],["dc.relation.eissn","0028-646X"],["dc.title","Ectomycorrhizas from a Lower Eocene angiosperm forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","219"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Journal of Astrobiology"],["dc.bibliographiccitation.lastpage","229"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Rincón-Tomás, Blanca"],["dc.contributor.author","Khonsari, Bahar"],["dc.contributor.author","Mühlen, Dominik"],["dc.contributor.author","Wickbold, Christian"],["dc.contributor.author","Schäfer, Nadine"],["dc.contributor.author","Hause-Reitner, Dorothea"],["dc.contributor.author","Hoppert, Michael"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2020-12-10T15:22:23Z"],["dc.date.available","2020-12-10T15:22:23Z"],["dc.date.issued","2016"],["dc.description.abstract","Carbonate minerals such as dolomite, kutnahorite or rhodochrosite are frequently, but not exclusively generated by microbial processes. In recent anoxic sediments, Mn(II)carbonate minerals (e.g. rhodochrosite, kutnahorite) derive mainly from the reduction of Mn(IV) compounds by anaerobic respiration. The formation of huge manganese-rich (carbonate) deposits requires effective manganese redox cycling in an oxygenated atmosphere. However, putative anaerobic pathways such as microbial nitrate-dependent manganese oxidation, anoxygenic photosynthesis and oxidation in ultraviolet light may facilitate manganese cycling even in an early Archean environment, without the availability of oxygen. In addition, manganese carbonates precipitate by microbially induced processes without change of the oxidation state, e.g. by pH shift. Hence, there are several ways how these minerals could have been formed biogenically and deposited in Precambrian sediments. We will summarize microbially induced manganese carbonate deposition in the presence and absence of atmospheric oxygen and we will make some considerations about the biogenic deposition of manganese carbonates in early Archean settings."],["dc.identifier.doi","10.1017/S1473550416000264"],["dc.identifier.eissn","1475-3006"],["dc.identifier.isi","000381033400006"],["dc.identifier.issn","1473-5504"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73384"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1475-3006"],["dc.relation.issn","1473-5504"],["dc.title","Manganese carbonates as possible biogenic relics in Archean settings"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","94"],["dc.bibliographiccitation.journal","Palaeogeography Palaeoclimatology Palaeoecology"],["dc.bibliographiccitation.lastpage","115"],["dc.bibliographiccitation.volume","390"],["dc.contributor.author","Agirrezabala, Luis M."],["dc.contributor.author","Kiel, Steffen"],["dc.contributor.author","Blumenberg, Martin"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T09:17:31Z"],["dc.date.available","2018-11-07T09:17:31Z"],["dc.date.issued","2013"],["dc.description.abstract","Late Albian deep-water sediments of the Black Flysch Group in the Basque-Cantabrian Basin (western Pyrenees) preserve a fossil pockmark field including methane seep carbonates and associated macrofauna. The geometry of the pockmarks is reconstructed from repeated lens-shaped turbidite deposits with centrally located carbonate bodies. Early diagenetic carbonate phases such as clotted micrite and yellow calcite with delta C-13 values as low as -41.6%, and hydrocarbon biomarkers (e.g. 2,6,10,15,19-pentamethylicosane) with strong depletions in C-13 indicate that the carbonates precipitated due to anaerobic oxidation of methane. The pockmarks probably formed due to subsidence induced by dewatering and degassing of the gas-charged seabed perhaps enhanced by the weight of the carbonate bodies. The macrofauna resembles that of other late Mesozoic deep-water methane-seeps world-wide, and is dominated by large lucinid and Caspiconcha bivalves, and hokkaidoconchid gastropods. During late diagenesis the carbonate delta O-18 values were reset to a narrow range of -12 to -10%., the remaining pore spaces and fissures were filled with pyrobitumen, and additional carbonate phases precipitated, potentially due to thermochemical sulfate reduction processes. (C) 2012 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.palaeo.2012.11.020"],["dc.identifier.isi","000328438600009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28188"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1872-616X"],["dc.relation.issn","0031-0182"],["dc.title","Outcrop analogues of pockmarks and associated methane-seep carbonates: A case study from the Lower Cretaceous (Albian) of the Basque-Cantabrian Basin, western Pyrenees"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","231"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","Geomicrobiology Journal"],["dc.bibliographiccitation.lastpage","242"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Schmidt, Burkhard C."],["dc.contributor.author","Quéric, Nadia Valérie"],["dc.contributor.author","Roering, Birgit"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T09:59:34Z"],["dc.date.available","2018-11-07T09:59:34Z"],["dc.date.issued","2015"],["dc.description.abstract","Palaeoproterozoic grano-dioritic rocks of the island of aspo exhibit several mineralized fracture generations mainly filled by quartz, calcite, fluorite and/or epidote. Manganese-rich calcite fractures of probably Palaeozoic age are related to younger, possibly Pleistocene/Holocene cracks formed during the last ice age and successive crustal uplift, in contact to the host rock, which are sometimes associated with organic matter. Signals of organic molecules could be gained on the corresponding phase boundaries with Raman spectroscopy, likewise HPLC and HPAE-PAD reveal the presence of carbohydrates and amino acids in bulk rock samples. It is supposed that most of the preserved organic matter is related with thin conditioning films. Extracted bacterial and fungal DNA from the grano-dioritic rocks indicates still active microbial activity in fracture micro-niches."],["dc.description.sponsorship","German Research Foundation [DFG - FOR 571, 48, Re 665/27-3]"],["dc.identifier.doi","10.1080/01490451.2014.911992"],["dc.identifier.isi","000352349600005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37620"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1521-0529"],["dc.relation.issn","0149-0451"],["dc.title","Organic Compounds and Conditioning Films Within Deep Rock Fractures of the aspo Hard Rock Laboratory, Sweden"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","641"],["dc.bibliographiccitation.journal","Marine and Petroleum Geology"],["dc.bibliographiccitation.lastpage","652"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Blumenberg, Martin"],["dc.contributor.author","Walliser, Eric-Otto"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Duda, Jan-Peter"],["dc.date.accessioned","2018-11-07T09:52:08Z"],["dc.date.available","2018-11-07T09:52:08Z"],["dc.date.issued","2015"],["dc.description.abstract","Peculiar carbonate bodies occur in distinct marl layers of the Marnes Bleues Formation (Aptian-Albian, Vocontian Basin, Southern France). The carbonate conduits exhibit pipe- or sausage-like forms and a central channel. Their sizes range between 30 and 60 cm in length and 5-10 cm in diameter. The conduit carbonates consist of automicrite authigenically formed within the sediment. Millimeter-sized aggregates of framboidal pyrite are abundant within the conduit automicrites, probably representing former colonies of sulfate reducing bacteria. The central channel reflects former pathways of reduced fluids in the carbonate conduit. Ni-enrichments at the margins of the central cavity are may be due to the activity of methane-related metabolism as Ni is an important bio-element for respective microbes. Light stable carbon isotope ratios of the conduit automicrites (-25.86 parts per thousand, to -23.10 parts per thousand, VPDB) point to carbonate precipitation linked to anaerobic oxidation of methane (AOM), while less depleted stable carbon isotope ratios of microspar in marginal zones of the central opening (-8.96 parts per thousand VPDB) are in line with microbial sulfate reduction. A methane-related origin of the conduit carbonates is confirmed by the presence of authigenic lipid biomarkers tentatively sourced by archaea most of which are characterized by strong C-13 depletions (delta C-13 values down to -104 parts per thousand). The presence of organically bound sulfur is well in line with microbial sulfate reduction. Isorenieratane potentially point to the presence of brown pigmented green sulfur bacteria. The methane was probably sourced by older OAE black shales which are known to contain isotopically (delta C-13) heavy biomarkers of archaea as reported elsewhere. (C) 2015 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.marpetgeo.2015.05.029"],["dc.identifier.isi","000365056000013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36052"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-4073"],["dc.relation.issn","0264-8172"],["dc.title","Methane-derived carbonate conduits from the late Aptian of Salinac (Marne Bleues, Vocontian Basin, France): Petrology and biosignatures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Schaefer, Nadine"],["dc.contributor.author","Schmidt, Burkhard C."],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T08:42:40Z"],["dc.date.available","2018-11-07T08:42:40Z"],["dc.date.issued","2010"],["dc.identifier.isi","000283941402538"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19756"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","Conference on Goldschmidt 2010 - Earth, Energy, and the Environment"],["dc.relation.eventlocation","Knoxville, TN"],["dc.title","Biosignature analyses of two different types of granites by Raman spectroscopy"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","435"],["dc.bibliographiccitation.lastpage","451"],["dc.bibliographiccitation.seriesnr","131"],["dc.contributor.author","Sanchez-Beristain, Francisco"],["dc.contributor.author","Schäfer, Nadine"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2019-11-06T10:17:41Z"],["dc.date.available","2019-11-06T10:17:41Z"],["dc.date.issued","2011"],["dc.description.abstract","The St. Cassian Formation (Upper Ladinian–Lower Carnian, Dolomites, Northeastern Italy) has been the subject of numerous studies “with various approaches”. The St. Cassian Formation was first mentioned in the first half of the nineteenth century (e.g., Wissmann and Münster 1841)."],["dc.identifier.doi","10.1007/978-3-642-10415-2_26"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62573"],["dc.language.iso","en"],["dc.publisher","Springer"],["dc.publisher.place","Berlin"],["dc.relation.crisseries","Lecture Notes in Earth Sciences"],["dc.relation.doi","10.1007/978-3-642-10415-2"],["dc.relation.isbn","978-3-642-10414-5"],["dc.relation.isbn","978-3-642-10415-2"],["dc.relation.ispartof","Advances in Stromatolite Geobiology"],["dc.relation.ispartofseries","Lecture Notes in Earth Sciences;131"],["dc.relation.issn","0930-0317"],["dc.title","New Geochemical Method to Characterise Microbialites from the St. Cassian Formation, Dolomites, Northeastern Italy"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]