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  • 2005-2009  (174)
  • 1980-1984  (70)
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  • 1
    Monographie ausleihbar
    Monographie ausleihbar
    Dynamics of ice sheets and glaciers (2009)
    Dordrecht [u.a.] : Springer
    Details Verfügbarkeit
    Signatur: M 10.0156
    Beschreibung / Inhaltsverzeichnis: Dynamics of Ice Sheets and Glaciers presents an introduction to the dynamics and thermodynamics of flowing ice masses on Earth. Based on an outline of general continuum mechanics, the different initial-boundary-value problems for the flow of ice sheets, ice shelves, ice caps and glaciers are systematically derived. Special emphasis is put on developing hierarchies of approximations for the different systems, and suitable numerical solution techniques are discussed. A separate chapter is devoted to glacial isostasy. The book is appropriate for graduate courses in glaciology, cryospheric sciences, environmental sciences, geophysics and related fields.
    Materialart: Monographie ausleihbar
    Seiten: XIV, 287 S. , Ill., graph. Darst., Kt. , 24 cm
    ISBN: 9783642034145
    Serie: Advances in geophysical and environmental mechanics and mathematics
    URL: http://www.springerlink.com/content/978-3-642-03414-5
    Klassifikation:
    Geodynamik
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Receptor binding studies disclose a novel class of high-affinity inhibitors of the Escherichia coli FimH adhesin (2005)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 55 (2005), S. 0 
    Details
    ISSN: 1365-2958
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Mannose-binding type 1 pili are important virulence factors for the establishment of Escherichia coli urinary tract infections (UTIs). These infections are initiated by adhesion of uropathogenic E. coli to uroplakin receptors in the uroepithelium via the FimH adhesin located at the tips of type 1 pili. Blocking of bacterial adhesion is able to prevent infection. Here, we provide for the first time binding data of the molecular events underlying type 1 fimbrial adherence, by crystallographic analyses of the FimH receptor binding domains from a uropathogenic and a K-12 strain, and affinity measurements with mannose, common mono- and disaccharides, and a series of alkyl and aryl mannosides. Our results illustrate that the lectin domain of the FimH adhesin is a stable and functional entity and that an exogenous butyl α- d-mannoside, bound in  the  crystal  structures,  exhibits  a  significantly better affinity for FimH (Kd = 0.15 µM) than mannose (Kd = 2.3 µM). Exploration of the binding affinities of α- d-mannosides with longer alkyl tails revealed affinities up to 5 nM. Aryl mannosides and fructose can also bind with high affinities to the FimH lectin domain, with a 100-fold improvement and 15-fold reduction in affinity, respectively, compared with mannose. Taken together, these relative FimH affinities correlate exceptionally well with the relative concentrations of the same glycans needed for the inhibition of adherence of type 1 piliated E. coli. We foresee that our findings will spark new ideas and initiatives for the development of UTI vaccines and anti-adhesive drugs to prevent anticipated and recurrent UTIs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2958.2004.04415.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    A tephra-based correlation between the Faroe Islands and the Norwegian Sea raises questions about chronological relationships during the last interglacial (2005)
    Oxford, UK : Blackwell Science Ltd
    Terra nova 17 (2005), S. 0 
    Details
    ISSN: 1365-3121
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie
    Notizen: Marine ash zones from the last interglacial period have been described from cores from the North Atlantic and an ash zone from the middle part of the interglacial has been observed in connection with a major cooling event. Here we present evidence for a coeval ash zone in a terrestrial site on the Faroe Islands. The investigated sediments are correlated with the upper part of oxygen isotope stage 5e and the beginning of stage 5d. The Eemian climatic optimum is represented in the lower part of the sequence close to the first occurrence of the ash zone. A tephra-based correlation suggests that the climatic optimum was synchronous with the marine record from the Norwegian Sea, but several thousand years later than in Eemian sections of west central Europe. However, many questions on the chronological relationship between the Eemian and oxygen isotope stage 5e still remain to be answered.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-3121.2004.00578.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Buchbesprechungen (1983)
    Springer
    Helgoland marine research 36 (1983), S. 473-483 
    Details
    ISSN: 1438-3888
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01983461
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Close binary systems before and after mass transfer: A comparison of observations and theory (1980)
    Springer
    Astrophysics and space science 68 (1980), S. 433-457 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract From a search through the literature 174 close binaries with known absolute dimensions have been sampled. Distinction is made between systems before and after mass exchange. Mass, period and mass ratio distributions and relations of the group of ‘unevolved’ binaries (i.e., prior to mass exchange) are transformed into corresponding distributions and relations of evolved binaries. The transformations are based upon theM 1f=g(M 1f) relation derived from an extended set of published theoretical computations of the evolution of close binaries. From this relation the following characteristics of the system after mass exchange are computed:M 1f,M 2f (andq f),P f. Five different modes of mass transfer were applied for the computation of the values ofP f andM 2f. The variation of the period was calculated using the formalism given by Vanbeverenet al. (1979). The results are compared to the observations of binary systems after mass exchange, and are discussed together with an analysis of the effect of several selection effects present in the distributions. The main conclusion is that, during mass exchange in close binaries, more than 50% of the mass is lost to the system in the process of transfer, removing a large amount of angular momentum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00639709
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 6
    Digitale Medien
    Digitale Medien
    Close binary systems before and after mass transfer. II.Semi-detached systems (1980)
    Springer
    Astrophysics and space science 72 (1980), S. 411-432 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Recent data on semi-detached systems are compared with general results of close binary computations to determine the origin of Algol-type systems (classical case A and case B results are considered). Both the conservative and the non-conservative mode of mass exchange are investigated. It is found that the assumption of considerable mass loss from the system gives satisfying agreement with the observations. It is also concluded that the calculation of an extensive homogeneous network of case A computations is needed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00639147
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 7
    Digitale Medien
    Digitale Medien
    Structure and evolution of large groups of Massive Close Binary systems (1982)
    Springer
    Astrophysics and space science 87 (1982), S. 357-375 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using the definition of four important events in the evolution of Massive Close Binary systems, we define five observable evolutionary phases in the life of a Massive Close Binary system: OB+OB, WR+OB, C+OB, C+WR, and WR+WR. We define and compute a number of observable phenomena for large groups of Massive Close Binaries. For one burst of star formation, we compute the number of systems in different evolutionary phases, and the total mass loss as functions of the time. For continuous star formation, we determine the fraction of WR binary stars, occurring in different phases of massive close binary evolution, and a number of average quantities (mass, mass ratio) of WR binary systems. The results are compared with observations of WR binaries in the Galaxy and in Open Clusters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00648930
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Comments on V505 mon: One of the most massive binaries (1983)
    Springer
    Astrophysics and space science 95 (1983), S. 215-217 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract From a discussion of the results or V505 Mon, we conclude that the spectral types contradict other parameters in the HR diagram.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00661176
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 9
    Digitale Medien
    Digitale Medien
    Close binary systems before and after mass transfer (1982)
    Springer
    Astrophysics and space science 87 (1982), S. 377-401 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A method is given to derive absolute dimensions from data of spectroscopic binary systems, with application to the 7th Catalogue of Spectroscopic Binary Systems of Battenet al. (1978). The different samples of solutions are analysed with regard to existing solutions. Absolute dimensions are given for 62 systems, not included in the tables of Popper (1980), Lacy (1979), and Giannone and Giannuzzi (1974).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00648931
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Bifurcation points in close binary evolution: Medium-mass binaries (1982)
    Springer
    Astrophysics and space science 84 (1982), S. 447-456 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The remaining core hydrogen burning lifetime after case B of mass transfer of the secondary (mass gaining) component in a medium mass close binary star is estimated, for mediummass binaries with primaries in the mass range 5M ⊙ to 9M ⊙. From the comparison of this quantity with the helium burning time-scale of the remnant primary a critical mass ratioq c is derived such that for larger values ofq, mass transfer from the secondary towards the primary starts before the latter has evolved into a white dwarf. Consequences for the advanced stages of medium mass binaries are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00651323
    Standort Signatur Erwartet Verfügbarkeit
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