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  1. Article

    Open Access

    Tolerance of clinical vancomycin-resistant Enterococcus faecium isolates against UV-C light from a mobile source

    Admission to a room previously occupied by patients carrying environmentally robust pathogens implies an increased risk of acquiring those pathogens. Therefore, ‘No-touch’ automated room disinfection systems, ...

    B. Knobling, G. Franke, C. Belmar Campos… in Antimicrobial Resistance & Infection Contr… (2023)

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  2. No Access

    Article

    Tedizolid susceptibility in linezolid- and vancomycin-resistant Enterococcus faecium isolates

    Vancomycin-resistant enterococci (VRE) are of ever-increasing importance, most notably in high-risk patient populations. Therapy options are often limited for these isolates, and apart from tigecycline and dap...

    E.-M. Klupp, A. Both, C. Belmar Campos… in European Journal of Clinical Microbiology … (2016)

  3. No Access

    Article

    Psychosocial outcomes after initial treatment of erectile dysfunction with tadalafil once daily, tadalafil on demand or sildenafil citrate on demand: results from a randomized, open-label study

    Initiation of ED treatment with a particular PDE5I may influence treatment-adherence and other outcomes. In this multicenter, open-label study, men with ED, naïve to PDE5I, were randomized to tadalafil 5 mg on...

    K Hatzimouratidis, J Buvat, H Büttner… in International Journal of Impotence Research (2014)

  4. No Access

    Article

    Chronische PDE-5-Hemmung bei erektiler Dysfunktion

    Patienten mit erektiler Dysfunktion (ED) haben häufig auch ein erhöhtes kardiovaskuläres Risiko. Eine Schädigung des Gefäßendothels (endotheliale Dysfunktion) mit herabgesetzter Stickoxidsynthase- (NOS-)Aktivi...

    Prof. Dr. H. Porst, K. Hell-Momeni, H. Büttner in Der Urologe (2009)

  5. No Access

    Article

    Metabolisches Syndrom und erektile Dysfunktion

    Der Zusammenhang zwischen einer erektilen Dysfunktion (ED) und den traditionellen Risikofaktoren einer Atherosklerose wie Dyslipidämie, Hypertonie, gestörter Glukosetoleranz und Adipositas ist in zahllosen Unt...

    Prof. Dr. A. Wirth, M. Manning, H. Büttner in Der Urologe (2007)

  6. No Access

    Chapter and Conference Paper

    Linear and Nonlinear Bound States in Curved Waveguides

    Motivated from curved waveguides embedded in photonic crystals, we examine the effects of geometry in a “quantum channel” of parabolic form. We study the linear case and derive exact as well as approximate exp...

    Yu.B. Gaididei, P.L. Christiansen… in Nonlinear Waves: Classical and Quantum Asp… (2004)

  7. No Access

    Article

    Exact ground state of the generalized three-dimensional Shastry-Sutherland model

    We generalize the Shastry-Sutherland model to three dimensions. By representing the model as a sum of the semidefinite positive projection operators, we exactly prove that the model has exact dimer ground stat...

    S. Chen, H. Büttner in The European Physical Journal B - Condense… (2002)

  8. No Access

    Article

    Radiochemotherapie beim Urothelkarzinom

    H. Büttner, T. Feyerabend, A. Böhle in Der Urologe A (2001)

  9. No Access

    Article

    Strahlentherapie von Urothelkarzinomen der Harnblase

    P. Vacha, H. Büttner, A. Böhle, T. Feyerabend in Der Urologe A (2001)

  10. No Access

    Article

    Lattice and Polarizability Effects on Singlet and Triplet States in an Effective Hamiltonian for High-Tc Cuprates

    From various theoretical approaches it seems to be rather well established that the Zhang–Rice (ZR) singlet state should play an important role in doped high-temperature superconducting (HTSC) oxides. Yet the con...

    A. Bussmann-Holder, A. Simon, H. Büttner, A. R. Bishop in Journal of Superconductivity (2000)

  11. No Access

    Article

    Männliche Infertilität

    H. Büttner, P. Fornara, J. Sandmann, C. Doehn, D. Jocham in Der Gynäkologe (2000)

  12. No Access

    Chapter

    Endocrinological Disturbances in Germ Cell Tumour Patients

    Men with testicular cancer are often not fertile. The disturbances can be seen in the spermiogram and the sex hormone levels. The kinetics of the hormone levels following tumour ablation have never been survey...

    T. Böhmer, T. Pottek, H. Büttner, M. Hartmann in The Fate of the Male Germ Cell (1997)

  13. No Access

    Article

    Theory of short-range magnetic order for the t-J model

    We present a self-consistent theory of magnetic short-range order based on a spin-rotation-invariant slaveboson representation of the 2D t-J model. In the functional-integral scheme, at the nearest-neighbour p...

    C. Schindelin, U. Trapper, H. Fehske, H. Büttner in Czechoslovak Journal of Physics (1996)

  14. No Access

    Article

    RVB theory of the Hubbard model on the triangular lattice

    We propose a Green's function technique, to investigate finite-temperature properties of the Hubbard model on the triangular lattice. The lattices are covered by dimers. The method is exact in two limits:U=0 or d...

    Udo Pecher, H. Büttner in Zeitschrift für Physik B Condensed Matter (1995)

  15. No Access

    Article

    Electron correlations and quantum lattice vibrations in strongly coupled electron-phonon systems: A variational slave boson approach

    We investigate the ground-state properties of the two-dimensional Hubbard model with an additional Holstein-type electron-phonon coupling on a square lattice. The effects of quantum lattice vibrations on the s...

    U. Trapper, H. Fehske, M. Deeg, H. Büttner in Zeitschrift für Physik B Condensed Matter (1994)

  16. No Access

    Article

    Polaron formation and hop** conductivity in the Holstein-Hubbard model

    On the basis of the Holstein-Hubbard model the formation of polarons at finite densities is investigated by means of a variational approach appropriate for describing squeezing and correlation effects. An effe...

    H. Fehske, D. Ihle, J. Loos, U. Trapper… in Zeitschrift für Physik B Condensed Matter (1994)

  17. No Access

    Chapter

    A Variational Slave Boson Approach to the Holstein-Hubbard Model

    Research on the high-T c cuprates has focused, once again, interest on strongly coupled electron-phonon (EP) systems. Although it is widely believed that most o...

    H. Fehske, U. Trapper, M. Deeg, H. Büttner in Nonlinear Coherent Structures in Physics a… (1994)

  18. No Access

    Article

    Slave-boson phase diagram of the two-dimensional extended Hubbard model: Influence of electron-phonon coupling

    We present a detailed study of the extended Hubbard-Peierls model on a square lattice using the slave-boson method proposed by Kotliar and Ruckenstein. The emphasis is on the investigation of the ground state ...

    M. Deeg, H. Fehske, H. Büttner in Zeitschrift für Physik B Condensed Matter (1993)

  19. No Access

    Article

    The orthorhombic-hexagonal phase transformation in the system BaCO3-SrCO3 to pressures of 7000 bar

    The orthorhombic-hexagonal phase transformation in the system BaCO3-SrCO3 has been investigated to 7000 bar by differential thermal analysis. The pressure dependence of the orthorhombic-hexagonal transformation t...

    S. Weinbruch, H. Büttner, M. Rosenhauer in Physics and Chemistry of Minerals (1992)

  20. No Access

    Article

    Slave boson mean field theory for the 2-D Peierls-Hubbard system

    Adapting the Kotliar-Ruckenstein slave boson approach to the Hubbard model with an additional local electronphonon interaction, we have studied the stability of the ground state against (π, π) and (π, 0) Peier...

    M. Deeg, H. Fehske, H. Büttner in Zeitschrift für Physik B Condensed Matter (1992)

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