TY - BOOK A1 - Thieme, André A1 - Tresp, Uwe T1 - Úvod Y1 - 2011 SN - 978-3-89923-285-1 ER - TY - THES A1 - Völker, Jan T1 - Ästhetik der Lebendigkeit : Kants dritte Kritik Y1 - 2011 SN - 978-3-7705-5161-3 PB - Fink CY - Paderborn ER - TY - THES A1 - Hörnke, Maria T1 - ß-Sheet formation of amyloidogenic model peptides at hydrophobic-hydrophilic interfaces BT - ß-Sheet formation of amyloidogenic model peptides at hydrophobic-hydrophilic interfaces Y1 - 2011 CY - Potsdam ER - TY - JOUR A1 - Kraft, Tobias T1 - ¿100 años de recepcíon? el ensayo politico sobre la Isla de Cuba de Alexander von Humboldt en la recepción cubana entre 1826 y 1930 Y1 - 2011 SN - 978-3-938944-54-7 ER - TY - THES A1 - Ehlers, Nils T1 - Zwischen schön und erhaben : Friedrich Schiller als Denker des Politischen ; im Spiegel seiner theoretischen Schriften Y1 - 2011 SN - 978-3-86955-714-4 PB - Cuvillier CY - Göttingen ER - TY - CHAP A1 - Prengel, Annedore T1 - Zwischen Heterogenität und Hierarchie in der Bildung - Studien zur Unvollendbarkeit der Demokratie T2 - Bildung in der Demokratie II : Tendenzen - Diskurse - Praktiken Y1 - 2011 SN - 978-3-86649-373-5 SP - 83 EP - 94 PB - Budrich CY - Opladen ER - TY - JOUR A1 - Riedel, Peter T1 - Zwischen bischöflicher Kurie und prämonstratensischem Kapitel : zur Vergabe bischöflicher Ämter als Spiegel der Beziehungen zwischen Bischof und Domstift im spätmittelalterlichen Bistum Brandenburg Y1 - 2011 SN - 978-3-942411-36-3 ER - TY - JOUR A1 - Lindecke, Oliver A1 - Scheffler, Ingo T1 - Zur Ektoparasitenfauna der Fledermäuse in Sachsen Anhalt : Ectoparasites of bats in Saxony-Anhalt N2 - During the summer 2010 several mist nettings for the monitoring of bat species were performed in Saxony-Anhalt. Captured individuals were tested for ectoparasitic infestation. The aim was to update the fauna of ectoparasites of this state and to collect data on the distribution of individual species. Regarding this, results of previous surveys are summarised. In the present study nine out of thirteen bat species were found to be infested with a total of one flea species, one species of bat flies and eight species of mites. The infestation with fleas was below the expectations. Six spinturnicid mite species out of those occurring in Germany could be ascertained for Saxony-Anhalt. These are Spinturnix acuminatus (Koch, 1836), S. andegavinus (Kolenati, 1857), S. helvetiae Deunff, Keller & Aellen, 1986, S. mystacinus (Kolenati, 1857), S. plecotinus (Koch, 1839) and S. puncata (Sundevall, 1833). Details about the infestation with parasites (abundances) of the respective bat species are presented. Further information on the biology of spinturnicid mites are given and infestation characteristics are compared with those of other surveys. Keywords: ectoparasites, bats, Chiroptera, gamasine mite, Acari, Spinturnix, Ischnopsyllidae, Nycteribiidae, Saxony-Anhalt, Germany Y1 - 2011 SN - 0018-0637 ER - TY - JOUR A1 - Heimann, Heinz-Dieter A1 - Neitmann, Klaus T1 - Zur Einleitung : was Papst und Kaiser durch ihr Wort beschützen Y1 - 2011 SN - 978-3-9810642-8-5 ER - TY - JOUR A1 - Bank, Roland A1 - Kashgar, Maral T1 - Zur Arbeit des Committee against Torture and other Cruel, Inhuman or Degrading Treatment or Punishment und des Subcommittee on Prevention of Torture Y1 - 2011 SN - 978-3-86956-104-2 ER - TY - JOUR A1 - Stillmark, Hans-Christian T1 - Zu Kleists theatralischer Transformation der Körper N2 - Der Beitrag untersucht Kleists Dramentexte vor allem im Hinblick auf den "Skandal" des Koerpers und versucht dafuer eine Erklaerung zu finden. Diese besteht zunaechst im Herausfall aus dem Paradigma des aesthetischem Koerpers als einem schoenen Koerper. Zum zweiten aber auch darin, das Kleist mit seinen literarischen Mitteln eine drastische Performation des Koerpers fuer das Buehnenstueck vornahm ohne dafuer eine theatralische Praxis zu haben. Der Einsatz des Koerpers als ein Zeichen im Buehnenspiel ist daher strategisch vom Autor Kleist zu einer Aussage performiert worden, die neben den Aussagen des sprachlichen Textes eine weitere koerpersprachliche Textur konstruiert. Y1 - 2011 SN - 978- 3-939888-93-2 ER - TY - BOOK A1 - von Humboldt, Alexander ED - Brignoli, Hector Pérez T1 - Zentralamerika BT - Centroamérica Y1 - 2011 SN - 978-9968-46-276-1 PB - Edit. UCR CY - San José, C.R. ER - TY - GEN A1 - von Humboldt, Alexander T1 - Zenralamerika Y1 - 2011 PB - Univ. CY - San jose ER - TY - JOUR A1 - Lilie, Hauke A1 - Baer, Dorit A1 - Kettner, Karina A1 - Weininger, Ulrich A1 - Balbach, Jochen A1 - Naumann, Manfred A1 - Mueller, Eva-Christina A1 - Otto, Albrecht A1 - Gast, Klaus A1 - Golbik, Ralph A1 - Kriegel, Thomas T1 - Yeast hexokinase isoenzyme ScHxk2 stability of a two-domain protein with discontinuous domains JF - Protein engineering design & selection N2 - The hexokinase isoenzyme 2 of Saccharomyces cerevisiae (ScHxk2) represents an archetype of a two-domain protein with the active site located in a cleft between the two domains. Binding of the substrate glucose results in a rigid body movement of the two domains leading to a cleft closure of the active site. Both domains of this enzyme are composed of discontinuous peptide sequences. This structural feature is reflected in the stability and folding of the ScHxk2 protein. Structural transitions induced by urea treatment resulted in the population of a thermodynamically stable folding intermediate, which, however, does not correspond to a molecule with one domain folded and the other unfolded. As demonstrated by different spectroscopic techniques, both domains are structurally affected by the partial denaturation. The intermediate possesses only 40% of the native secondary structural content and a substantial increase in the Stokes radius as judged by circular dichroism and dynamic light scattering analyses. One-dimensional H-1 NMR data prove that all tryptophan residues are in a non-native environment in the intermediate, indicating substantial changes in the tertiary structure. Still, the intermediate possesses quite a high stability for a transition intermediate of about Delta G = -22 kJ mol(-1). KW - dynamic light scattering KW - NMR KW - ScHxk2 KW - stability KW - transition intermediate Y1 - 2011 U6 - https://doi.org/10.1093/protein/gzq098 SN - 1741-0126 VL - 24 IS - 1-2 SP - 79 EP - 87 PB - Oxford Univ. Press CY - Oxford ER - TY - JOUR A1 - Lilie, Hauke A1 - Bär, Dorit A1 - Kettner, Karina A1 - Weininger, Ulrich A1 - Balbach, Jochen A1 - Naumann, Manfred A1 - Müller, Eva-Christina A1 - Otto, Albrecht A1 - Gast, Klaus A1 - Golbik, Ralph T1 - Yeast hexokinase isoenzyme ScHxk2 : stability of a two-domain protein with discontinuous domains N2 - The hexokinase isoenzyme 2 of Saccharomyces cerevisiae (ScHxk2) represents an archetype of a two-domain protein with the active site located in a cleft between the two domains. Binding of the substrate glucose results in a rigid body movement of the two domains leading to a cleft closure of the active site. Both domains of this enzyme are composed of discontinuous peptide sequences. This structural feature is reflected in the stability and folding of the ScHxk2 protein. Structural transitions induced by urea treatment resulted in the population of a thermodynamically stable folding intermediate, which, however, does not correspond to a molecule with one domain folded and the other unfolded. As demonstrated by different spectroscopic techniques, both domains are structurally affected by the partial denaturation. The intermediate possesses only 40% of the native secondary structural content and a substantial increase in the Stokes radius as judged by circular dichroism and dynamic light scattering analyses. One-dimensional 1H NMR data prove that all tryptophan residues are in a non-native environment in the intermediate, indicating substantial changes in the tertiary structure. Still, the intermediate possesses quite a high stability for a transition intermediate of about ;G = ;22 kJ mol;1. Y1 - 2011 UR - http://peds.oxfordjournals.org/content/24/1-2/79.long SN - 0269-2139 ER - TY - JOUR A1 - Redelberger, David A1 - Seduk, Farida A1 - Genest, Olivier A1 - Mejean, Vincent A1 - Leimkühler, Silke A1 - Iobbi-Nivol, Chantal T1 - YcdY Protein of Escherichia coli, an Atypical Member of the TorD Chaperone Family JF - Journal of bacteriology N2 - The TorD family of specific chaperones is divided into four subfamilies dedicated to molybdoenzyme biogenesis and a fifth one, exemplified by YcdY of Escherichia coli, for which no defined partner has been identified so far. We propose that YcdY is the chaperone of YcdX, a zinc protein involved in the swarming motility process of E. coli, since YcdY interacts with YcdX and increases its activity in vitro. Y1 - 2011 U6 - https://doi.org/10.1128/JB.05927-11 SN - 0021-9193 VL - 193 IS - 23 SP - 6512 EP - 6516 PB - American Society for Microbiology CY - Washington ER - TY - JOUR A1 - Kalimuthu, Palraj A1 - Leimkühler, Silke A1 - Bernhardt, Paul V. T1 - Xanthine dehydrogenase electrocatalysis autocatalysis and novel activity JF - The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces & biophysical chemistry N2 - The enzyme xanthine dehydrogenase (XDH) from the purple photosynthetic bacterium Rhodobacter capsulatus catalyzes the oxidation of hypoxanthine to xanthine and xanthine to uric acid as part of purine metabolism. The native electron acceptor is NAD(+) but herein we show that uric acid in its 2-electron oxidized form is able to act as an artificial electron acceptor from XDH in an electrochemically driven catalytic system. Hypoxanthine oxidation is also observed with the novel production of uric acid in a series of two consecutive 2-electron oxidation reactions via xanthine. XDH exhibits native activity in terms of its pH optimum and inhibition by allopurinol. Y1 - 2011 U6 - https://doi.org/10.1021/jp111809f SN - 1520-6106 VL - 115 IS - 11 SP - 2655 EP - 2662 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Giewekemeyer, K. A1 - Krueger, S. P. A1 - Kalbfleisch, S. A1 - Bartels, Meike A1 - Beta, Carsten A1 - Salditt, T. T1 - X-ray propagation microscopy of biological cells using waveguides as a quasipoint source JF - Physical review : A, Atomic, molecular, and optical physics N2 - We have used x-ray waveguides as highly confining optical elements for nanoscale imaging of unstained biological cells using the simple geometry of in-line holography. The well-known twin-image problem is effectively circumvented by a simple and fast iterative reconstruction. The algorithm which combines elements of the classical Gerchberg-Saxton scheme and the hybrid-input-output algorithm is optimized for phase-contrast samples, well-justified for imaging of cells at multi-keV photon energies. The experimental scheme allows for a quantitative phase reconstruction from a single holographic image without detailed knowledge of the complex illumination function incident on the sample, as demonstrated for freeze-dried cells of the eukaryotic amoeba Dictyostelium discoideum. The accessible resolution range is explored by simulations, indicating that resolutions on the order of 20 nm are within reach applying illumination times on the order of minutes at present synchrotron sources. Y1 - 2011 U6 - https://doi.org/10.1103/PhysRevA.83.023804 SN - 1050-2947 VL - 83 IS - 2 PB - American Physical Society CY - College Park ER - TY - JOUR A1 - Parkin, E. R. A1 - Broos, Patrick S. A1 - Townsley, L. K. A1 - Pittard, J. M. A1 - Moffat, Anthony F. J. A1 - Naze, Y. A1 - Rauw, G. A1 - Oskinova, Lidia M. A1 - Waldron, W. L. T1 - X-RAY EMISSION FROM THE DOUBLE-BINARY OB-STAR SYSTEM QZ CAR (HD 93206) JF - ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES N2 - X-ray observations of the double-binary OB-star system QZ Car (HD 93206) obtained with the Chandra X-ray Observatory over a period of roughly 2 years are presented. The respective orbits of systems A (O9.7 I+b2 v, P-A = 21 days) and B (O8 III+o9 v, P-B = 6 days) are reasonably well sampled by the observations, allowing the origin of the X-ray emission to be examined in detail. The X-ray spectra can be well fitted by an attenuated three-temperature thermal plasma model, characterized by cool, moderate, and hot plasma components at kT similar or equal to 0.2, 0.7, and 2 keV, respectively, and a circumstellar absorption of similar or equal to 0.2 x 10(22) cm(-2). Although the hot plasma component could be indicating the presence of wind-wind collision shocks in the system, the model fluxes calculated from spectral fits, with an average value of similar or equal to 7x10(-13) erg s(-1) cm(-2), do not show a clear correlation with the orbits of the two constituent binaries. A semi-analytical model of QZ Car reveals that a stable momentum balance may not be established in either system A or B. Yet, despite this, system B is expected to produce an observed X-ray flux well in excess of the observations. If one considers the wind of the O8 III star to be disrupted by mass transfer, the model and observations are in far better agreement, which lends support to the previous suggestion of mass transfer in the O8 III+o9 v binary. We conclude that the X-ray emission from QZ Car can be reasonably well accounted for by a combination of contributions mainly from the single stars and the mutual wind-wind collision between systems A and B. KW - hydrodynamics KW - stars: early-type KW - stars: individual (QZ Carinae) KW - stars: massive KW - stars: winds, outflows KW - X-rays: stars Y1 - 2011 U6 - https://doi.org/10.1088/0067-0049/194/1/8 SN - 0067-0049 VL - 194 IS - 1 PB - IOP PUBLISHING LTD CY - BRISTOL ER - TY - JOUR A1 - Oskinova, Lidia M. A1 - Hamann, Wolf-Rainer A1 - Cassinelli, Joseph P. A1 - Brown, John C. A1 - Todt, Helge Tobias T1 - X-ray emission from massive stars with magnetic fields JF - Astronomische Nachrichten = Astronomical notes N2 - We investigate the connections between the magnetic fields and the X-ray emission from massive stars. Our study shows that the X-ray properties of known strongly magnetic stars are diverse: while some comply to the predictions of the magnetically confined wind model, others do not. We conclude that strong, hard, and variable X-ray emission may be a sufficient attribute of magnetic massive stars, but it is not a necessary one. We address the general properties of X-ray emission from "normal" massive stars, especially the long standing mystery about the correlations between the parameters of X-ray emission and fundamental stellar properties. The recent development in stellar structure modeling shows that small-scale surface magnetic fields may be common. We suggest a "hybrid" scenario which could explain the X-ray emission from massive stars by a combination of magnetic mechanisms on the surface and shocks in the stellar wind. The magnetic mechanisms and the wind shocks are triggered by convective motions in sub-photospheric layers. This scenario opens the door for a natural explanation of the well established correlation between bolometric and X-ray luminosities. KW - stars: magnetic fields KW - stars: mass-loss KW - stars: winds, outflows KW - stars: Wolf-Rayet KW - techniques: spectroscopic KW - X-rays: stars Y1 - 2011 U6 - https://doi.org/10.1002/asna.201111602 SN - 0004-6337 VL - 332 IS - 9-10 SP - 988 EP - 993 PB - Wiley-Blackwell CY - Malden ER -