Martin Arndt

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INTRODUCTION The purpose of this study was to examine whether nickel-titanium (Ni-Ti) archwires cause an increase of nickel concentration in the saliva of 18 orthodontic patients to estimate the possible risk of these archwires in patients who have nickel hypersensitivity. METHODS Saliva samples were collected before orthodontic treatment, after placement(More)
Self-assembly processes and organic-organic heteroepitaxy are powerful techniques to obtain highly ordered molecular aggregates. Here we demonstrate that combining both methods allows not only to fabricate highly crystalline and uniaxially oriented self-assembled nanofibers but also to tune their polarized emission. We show that submonolayer coverage of(More)
The rapid deployment of wireless networks has radically changed the development methods of applications and solutions. Nevertheless, there are still poorly served areas with network infrastructures, especially the road systems when considering the intelligent transportation systems and on-the-road Internet and entertainment services. While the most known(More)
Ultrathin MgO(100) films serving as a diffusion barrier between ferromagnetic electrodes and GaAs(001) semiconductor templates have been investigated. Using Fe as an exemplary ferromagnetic material, heterostructures of Fe/MgO/GaAs(001) were prepared at 200 °C with the MgO thickness ranging from 1.5 to 3 nm. Structural characterization reveals very good(More)
BACKGROUND In Parkinson's disease (PD), alpha-synuclein accumulation in cutaneous autonomic pilomotor and sudomotor nerve fibers has been linked to autonomic nervous system disturbances even in the early stages of the disease. This study aims to assess the association between alpha-synuclein-mediated structural autonomic nerve fiber damage and function in(More)
Wireless Mesh Netzworks (WMNs) werden aufgrund ihrer Flexibilität als effiziente, drahtlose Alternative zur Versorgung von strukturschwachen Gebieten eingesetzt. Das Design vollständig autonom funktionsfähiger MeshKnoten stellt jedoch noch immer eine große Herausforderung dar. Basierend auf einer modularen Netzwerkarchitektur wird in diesem Artikel das(More)
„Wurzeln und Flügel“ sollten Kinder bekanntlich von ihren Eltern bekommen um Bindung und Freiheit zu erfahren. Möchte man engagierte forschungsorientierte Gruppenlernprozesse gestalten spielen diese beiden Aspekte ebenfalls eine zentrale Rolle. Die Teilnehmenden solcher Prozesse erarbeiten sich gemeinsam den Zugang zu einem Themengebiet, finden sich in(More)
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