Search Results - (Author, Cooperation:B. Zimmermann)

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  1. 1
    Staff View
    Publication Date:
    2016-01-07
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; Cell Proliferation ; Cell Respiration ; Endothelium, Vascular/cytology/*growth & development/*metabolism ; Female ; Forkhead Transcription Factors/deficiency/genetics/*metabolism ; Glycolysis ; Human Umbilical Vein Endothelial Cells/cytology/metabolism ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; Proto-Oncogene Proteins c-myc/deficiency/genetics/metabolism ; Signal Transduction
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2011-04-19
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Acetylation ; Animals ; Endothelial Cells/cytology/*enzymology ; *Gene Expression Regulation ; Gene Knockout Techniques ; Gene Silencing ; HEK293 Cells ; Humans ; Mice ; Mutation ; Receptor, Notch1/metabolism ; Receptors, Notch/*metabolism ; Signal Transduction/*physiology ; Sirtuin 1/*genetics/*metabolism ; Zebrafish/embryology/genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Type of Medium:
    article
    Publication Date:
    1994
    Keywords:
    Anforderungsprofil ; Berufseignung ; Transportberuf
    In:
    Der Industriemeister, Bd. 24 (1994) H. 2, S. 36-40, 0537-5770
    0940-8436
    Language:
    German
    FIS Bildung Literaturdatenbank
  4. 4
    Staff View
    Type of Medium:
    article
    Publication Date:
    1994
    Keywords:
    Berufsbildung ; Anforderungsprofil ; Ausbildungsinhalt ; Transportberuf ; Fortbildung
    In:
    Der Industriemeister, Bd. 24 (1994) H. 3, S. 22-25, 0537-5770
    0940-8436
    Language:
    German
    FIS Bildung Literaturdatenbank
  5. 5
    Staff View
    Type of Medium:
    article
    Publication Date:
    1997
    Keywords:
    Schuljahr 11 ; Unterrichtsversuch ; Integralrechnung ; Mathematik ; Mathematikunterricht ; Heuristik ; Wissenschaftsgeschichte ; Erfahrungsbericht
    In:
    Mathematik in der Schule, Bd. 35 (1997) H. 5, S. 271-280, 0465-3750
    Language:
    German
    FIS Bildung Literaturdatenbank
  6. 6
    Zimmermann, B. ; Marclay, E. ; Ilegems, M. ; Guéret, P.

    [S.l.] : American Institute of Physics (AIP)
    Published 1988
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We present calculations and measurements of current as a function of voltage I(V), and conductivity at low voltage as a function of temperature, G(T), for n+ -GaAs/i- Alx Ga1−x As/n+ -GaAs single-barrier tunneling structures. The current is modeled by its tunneling and thermionic emission components. The shape of the conduction-band edge is obtained by solving Poisson's equation self-consistently, together with two different models for the charge density. In the first model, the electron density is evaluated semiclassically, and in the second, the electron density is calculated from the electronic wave functions. Good agreement is obtained with both models between the experimental and the calculated I(V) and G(T) characteristics over the 4.2–200 K temperature range. The fits obtained are very sensitive to small variations (1%) in barrier width and effective barrier height, which allows one to determine these parameters within a narrower uncertainty range.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    ZABERN, I. ; PRZYKLENK, H. ; DAMERAU, B. ; ZIMMERMANN, B.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1981
    Staff View
    ISSN:
    1365-3083
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    A complement inhibitor (CI) has been isolated from cobra (Naja haje) venom which is distinct from the two known anticomplementary factors in cobra venom [1], in functional properties as well as structure. CI is a small (mol. wt 26,000, determined by sodium dodecyl sulphate gel electrophoresis), heat-labile glycoprotein; the amino acid composition is that of a globular protein. CI interferes at various steps of the complement sequence, including reactions of the classical and the alternative pathway. No effect was observed on C4 fixation and on the assembly of the membrane attack complex from C6–9 (minor inhibiting effects, if present, have not been excluded). Initiation of the alternative pathway is inhibited by CI already at the stage of cleavage of factor B. CI binds to C4, C4b. C3 and C3b: since the major inhibitory action of CI is lost after washing of cell intermediates, complex formation and, as a consequence, steric hindrance may be responsible for the inhibiting effects of CI. CI also interferes with binding of C3b to C3b receptors on human erythrocytes. CI is non-toxic in mice when given intraperitoneally in doses of 5 μg/g.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Zimmermann, B. ; Somogyi, H. ; Wachtel, H.C.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0922-3371
    Keywords:
    Cartilage ; Endochondral mineralization ; In vitro ; Organoid culture
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    0922-3371
    Keywords:
    Calvarial cell ; Mineralization in vitro ; Organoid culture
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    0885-4505
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Neiger, M. ; Zimmermann, B.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0022-4073
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  12. 12
    Neiger, M. ; Zimmermann, B.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0022-4073
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  13. 13
    Kuhnz, W. ; Zimmermann, B. ; Nau, H.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0378-4347
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  14. 14
    Kuhn, K. ; Engel, J. ; Zimmermann, B. ; Grassmann, W.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0003-9861
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  15. 15
    Shakibaei, M. ; Zimmermann, B. ; Scheller, M.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    1047-8477
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  16. 16
    Ulmer, K. ; Zimmermann, B.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0042-207X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  17. 17
    Zimmermann, B.
    Springer
    Published 1990
    Staff View
    ISSN:
    1436-5081
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mathematics
    Notes:
    Abstract We explicitly compute the outer automorphism group Out π1 M of the fundamental group of the Hantzsche — Wendt manifoldM. It is an extension 1→(ℤ2)3→Outπ1 M→S 3⊕ℤ2→1, but not the semidirect product (ℤ2)3⋉(S 3⊕ℤ2) as claimed in [3] (see also [4]). As a consequence, we get a quick algebraic computation of the symmetry groups of the Borromean rings and the figure-8-knot.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  18. 18
    Zimmermann, B.
    Springer
    Published 1994
    Staff View
    ISSN:
    1436-5081
    Keywords:
    57M99
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mathematics
    Notes:
    Abstract We describe a method for constructing an arbitrary number of closed hyperbolic 3-manifolds of the same volume. In fact we prove that many hyperbolic 3-manifolds of finite volume have an arbitrary number of non-homeomorphic finite convering spaces of the same degree and hence the same volume. This applies, for example, to all hyperbolic 3-manifolds whose universal covering group is a subgroup of finite index in a Coxeter group generated by the reflections in the faces of a hyperbolic Coxeter polyhedron. It also applies to all hyperbolic 3-manifolds of finite volume with at least one cusp.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  19. 19
    Caussignac, Ph. ; Zimmermann, B. ; Ferro, R.
    Springer
    Published 1990
    Staff View
    ISSN:
    1436-5057
    Keywords:
    65L60 ; Numerical analysis ; nonlinear differential equations ; finite elements ; numerical simulation
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Computer Science
    Description / Table of Contents:
    Zusammenfassung Das Problem der Berechnung des elektrostatischen Potentials in eindimensionalen Mehrschichtstrukturen mit quantifizierter Elektronenladung wird unter Zuhilfenahme der Theorie monotoner Operatoren und von Störungstheorie untersucht. Eine Fehlerabschätzung wird gegeben für den Fall einer Diskretisierung mit Lagrange-finiten Elementen erster Ordnung. Eine praktische Implementierung dieser Methode bei Verwendung eines quasi-Newton Algorithmus sowie numerische Resultate werden gezeigt.
    Notes:
    Abstract The problem of computing the electrostatic potential in a one dimensional multilayer semiconductor device with quantized electrons density is analysed using results of monotone operator theory and perturbation calculus. An error estimate is proved for the discretization with Lagrange finite elements of degree one. A practical implementation of the method, using a quasi-Newton algorithm is presented together with some numerical results.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  20. 20
    Ahmadi, A. ; Zimmermann, B. ; Böhm, M.
    Springer
    Published 1991
    Staff View
    ISSN:
    1435-604X
    Keywords:
    Laser vascular welding ; Tissue fusion ; Electron microscopy
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Physics
    Technology
    Notes:
    Abstract The central problem in microsurgery is the reconstruction of small vessels. The long operating time, foreign body granuloma formation around the suture material as well as aneurysmal alterations of the vessel wall after conventional suture technique make the search for alternatives indispensable. Some of these disadvantages can be avoided as demonstrated by our animal experiments and histological examinations in laser-assisted anastomosing. The aim of this study is to show these aspects in connection with laser application and compare them with conventional suture techniques.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses