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Article
Open AccessTolerance 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, ...
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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...
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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...
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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...
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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...
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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...
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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...
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Article
Radiochemotherapie beim Urothelkarzinom
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Article
Strahlentherapie von Urothelkarzinomen der Harnblase
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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...
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Article
Männliche Infertilität
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...