810 research outputs found
Tidal Synchronisation Of The Subdwarf B Binary Pg 0101+039
Get PDFAims. Tidally locked rotation is a frequently applied assumption that helps to measure masses of invisible compact companions in close binaries. The calculations of synchronisation times are affected by large uncertainties, in particular for stars with radiative envelopes, calling for observational constraints. We aim to verify tidally locked rotation for the binary PG 0101+039, a subdwarf B star + white dwarf binary from its tiny (0.025%) light variations measured with the MOST satellite (Randall et al. 2005). Methods. Binary parameters were derived from the mass function, apparent rotation and surface gravity of PG 0101+039 assuming a canonical mass of 0.47 M-circle dot and tidally locked rotation. The light curve was then synthesised and was found to match the observed amplitude well. Results. We verified that the light variations are due to ellipsoidal deformation and that tidal synchronisation is established for PG 0101+039. Conclusions. We conclude that this assumption should hold for all sdB binaries with orbital periods of less than half a day. Hence the masses can be derived from systems that are too faint to measure tiny light variations.Deutsche Forschungsgemeinschaft He1354/40-3McDonald Observator
Stability of added and in situ-produced vitamin B12 in breadmaking
No full textVitamin B12 exists naturally in foods of animal origin and is synthesised only by certain bacteria. New food sources are needed to ensure vitamin B12 intake in risk groups. This study aimed to investigate the stability of added cyanocobalamin (CNCbl, chemically modified form) and hydroxocobalamin (OHCbl, natural form) and in situ-synthesised vitamin B12 in breadmaking. Samples were analysed both with a microbiological (MBA) and a liquid chromatographic (UHPLC) method to test applicability of these two methods.Proofing did not affect CNCbl and OHCbl levels. By contrast, 21% and 31% of OHCbl was lost in oven-baking steps in straight-and sponge-dough processes, respectively, whereas CNCbl remained almost stable. In sourdough baking, 23% of CNCbl and 44% of OHCbl were lost. In situ-produced vitamin B12 was almost as stable as added CNCbl and more stable than OHCbl. The UHPLC method showed its superiority to the MBA in determining the active vitamin B12. (C) 2016 Published by Elsevier Ltd
A Structurally Characterized Organometallic Plutonium(IV) Complex
No full textbibtex: ISI:000399384700030 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Walter, O (Reprint Author), European Commiss, Joint Res Ctr, Directorate Nucl Safety & Secur G, POB 2340, D-76125 Karlsruhe, Germany. Vogt, J; Edelmann, FT (Reprint Author), Otto von Guericke Univ, Inst Chem, Univ Pl 2, D-39106 Magdeburg, Germany. Maron, L (Reprint Author), Univ Toulouse, INSA, CNRS, Lab Phys & Chim Nanoobjets LPCNO,UMR5215, 135 Ave Rangueil, F-31077 Toulouse 4, France. Apostolidis, Christos; Walter, Olaf, European Commiss, Joint Res Ctr, Directorate Nucl Safety & Secur G, POB 2340, D-76125 Karlsruhe, Germany. Vogt, Jochen; Liebing, Phil; Edelmann, Frank T., Otto von Guericke Univ, Inst Chem, Univ Pl 2, D-39106 Magdeburg, Germany. Maron, Laurent, Univ Toulouse, INSA, CNRS, Lab Phys & Chim Nanoobjets LPCNO,UMR5215, 135 Ave Rangueil, F-31077 Toulouse 4, France.','author-email':'[email protected] [email protected] [email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'ES2UZ',eissn:'1521-3773','funding-acknowledgement':'Otto-von-Guericke-Universitat Magdeburg','funding-text':'We thank the Otto-von-Guericke-Universitat Magdeburg for general financial support.','journal-iso':'Angew. Chem.-Int. Edit.','keywords-plus':'TRIS(ETA-5-CYCLOPENTADIENYL) ACTINIDE COMPLEXES; FOCK PERTURBATION-THEORY; BUILDING-BLOCK APPROACH; F-ORBITAL COVALENCY; SANDWICH COMPLEXES; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; CYCLOOCTATETRAENYL COMPLEXES; TH-PU; ACTINOCENES','number-of-cited-references':'69',oa:'Other Gold, Green Published','orcid-numbers':'Edelmann, Frank T./0000-0001-5209-0018 walter, olaf/0000-0002-2679-1715 Liebing, Phil/0000-0002-4660-1691','research-areas':'Chemistry','times-cited':'8','unique-id':'ISI:000399384700030','usage-count-last-180-days':'2','usage-count-since-2013':'23','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceThe blood-red plutonocene complex Pu(1,3-COT `')(1,4-COT `') (4; COT `' = eta(8)-bis(trimethylsilyl) cyclooctatetraenyl) has been synthesized by oxidation of the anionic sandwich complex Li[Pu(1,4-COT `')(2)] (3) with anhydrous cobalt(II) chloride. The first crystal structure determination of an organoplutonium(IV) complex revealed an asymmetric sandwich structure for 4 where one COT `' ring is 1,3-substituted while the other retains the original 1,4-substitution pattern. The electronic structure of 4 has been elucidated by a computational study, revealing a probable cause for the unexpected silyl group migration
Lehrkräfte mit Migrationshintergrund – ein Potenzial pädagogischer Professionalität im Umgang mit der migrationsbedingten Heterogenität
No full textStruktur von [CPRu(C0)2]2 (Cp = η5-pentamethylcyclopentadienyl)
No full textThe molecular structure of di-μ-carbonyl-bis[carbonyl(η5-pentamethylcyclopentadienyl)ruthenium] (Ru---Ru) has been determined by a single-crystal X-ray diffraction study (monoclinic, space group P21/n,a = 979.90(9), b = 831.91(7), c = 1427.75(12) pm, β = 100.026(9)°, R = 0.018). In the solid state the complex exists solely as the trans-carbonyl bridged isomer. The Ru---Ru bond length is 275.2(1) pm
Migrationshintergrund und Gender: Eine Überprüfung der statistischen Konstruktion von Differenz am Beispiel der Lehrerinnen- und Lehrerbildung in der Schweiz
No full textIn der aktuellen Hochschulforschung erweisen sich die Differenzkategorien Migrationshintergrund und Gender für die Zusammensetzung der Studierenden an Pädagogischen Hochschulen in der Schweiz als bedeutend, wobei Frauen über- und Studierende mit Migrationshintergrund unterrepräsentiert sind (Beck/Bischoff/Edelmann 2014, Bundesamt für Statistik (BFS) 2014). Der Artikel untersucht die Konsequenzen unterschiedlicher Operationalisierungen von Differenz an Hand des sogenannten Migrationshintergrundes unter besonderer Berücksichtigung der Intersektionalität von Geschlecht und Migrationshintergrund. Dabei werden drei unterschiedliche Operationalisierungen unterschieden: A) Die Operationalisierung nach Nationalität, B) nach Geburtsland der befragten Person sowie ihrer Eltern sowie C) nach Nationalität und Geburtsland, analog der Definition des Bundesamts für Statistik Schweiz. Mit den Daten zur Befragung zur "Sozialen und wirtschaftlichen Lage der Studierenden (SSEE)" von 2013 (Bundesamt für Statistik (BFS) 2014) werden zum einen der Einfluss auf die Verteilung von Studierenden mit Migrationshintergrund auf Pädagogische Hochschulen in der Schweiz sowie allfällige Unterschiede in den berichteten Studienwahlmotiven untersucht. Die Resultate zeigen, dass der Anteil Studierenden mit Migrationshintergrund an pädagogischen Hochschulen stark von der Operationalisierung abhängt: Bei Variante A) werden rund 10 % der Studierenden als mit Migrationshintergrund identifiziert, wohingegen es bei Variante B) 31 % sind. Bezüglich der berichteten Studienwahlmotive geben Männer ohne Migrationshintergrund das geringste fachliche Interesse an, Frauen mit Migrationshintergrund der ersten Generation geben die höchsten Karrieremotive, Männer mit Migrationshintergrund der ersten Generation die niedrigste Fähigkeitsüberzeugung an. Zwar variieren die Effekte in Abhängigkeit der Operationalisierung leicht, jedoch erklären die Modelle insgesamt sehr wenig der Varianz in den selbstberichteten Studienwahlmotiven.Kriesi, I., Liebig, B., Horwath, I., & Riegraf, B. (Hrsg.). (2016), Gender und Migration an Universitäten, Fachhochschulen und in der höheren Berufsbildung (Forum Frauen- und Geschlechterforschung, Band 46). Münster: Westfälisches Dampfboot, S. 168-192.Publishe
Disputationes de Iliadis B, 1 - 483 / 2
No full textVorlageform des Erscheinungsvermerks: Leipzig. Druck von Alexander Edelmann, Universitäts-Buchdrucker
Development of DC-specific lentiviral vectors: novel DC-targeting strategies for immunomodulation
Get PDFBook Review: \u3ci\u3eHindu Theology and Biology. The Bhāgavata Purāṇa and Contemporary Theory.\u3c/i\u3e
Get PDFBook review of, Hindu Theology and Biology. The Bhāgavata Purāṇa and Contemporary Theory by Jonathan B. Edelmann
Longitudinal association between N-terminal B-type natriuretic peptide, anxiety and social support in patients with HFpEF: results from the multicentre randomized controlled Aldo-DHF trial
No full textBackground
Higher plasma levels of natriuretic peptides (NPs) have been associated with reduced anxiety in experimental research and a number of patient samples. As NP levels are elevated in heart failure patients, we investigate whether this elevation is related to anxiety in patients with heart failure with preserved ejection fraction (HFpEF).
Methods
Post-hoc regression and mediation analyses were conducted, using data of 422 patients with HFpEF from the randomized, placebo-controlled, double-blinded, two-armed, multicentre aldosterone in diastolic heart failure trial, testing associations and their mediators between the N-terminal B-type natriuretic peptide (NT-proBNP) and anxiety at baseline and over 12-month follow-up. Anxiety was measured by the Hospital Anxiety and Depression Scale (HADS), social support by the ENRICHD Social Support Inventory and physical functioning by the Short Form 36 Health Survey.
Results
The mean age of the study population was 66.8 ± 7.6 years, 47.6% were male and 86.0% had NYHA class II. NT-proBNP showed a weak negative correlation with HADS anxiety scores at baseline (r = − 0.087; p = 0.092), which was significant (r = − 0.165; p = 0.028) in men but not in women. NT-proBNP also tended to predict lower anxiety at 12-months in men. On the other hand, higher anxiety at baseline was associated with lower NT-proBNP scores 12 months later (r = − 0.116; p = 0.026). All associations lost significance in multivariate regression for age, perceived social support (ESSI), physical function (SF-36) and study arm. Mediation analyses revealed that social support acts as a full mediator for the link between NT-proBNP levels and anxiety.
Conclusion
The mechanisms linking NT-proBNP to anxiety may be more complex than originally assumed. While effects of NT-proBNP on anxiety may be mediated by perceived social support, there may be an additional negative effect of anxiety on NT-proBNP. Future research should consider this possible bi-directionality of the association and assess the potential influence of gender, social support, oxytocin and vagal tone on the interaction of anxiety and natriuretic peptide levels.
Trial Registration
http://www.controlled-trials.com
(ISRCTN94726526) on 07/11/2006.
Eudra-CT-number: 2006–002,605-31.Open-Access-Publikationsfonds 202
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