Evolution of a Combined UV/Vis and NMR Setup with Fixed Pathlengths for Mass-limited Samples.

The investigation of reaction mechanisms is a complex task that usually requires the use of several techniques. To obtain as much information as possible on the reaction and any intermediates - possibly invisible to one technique - the combination of techniques is a solution. In this work we present a new setup for combined UV/Vis and NMR spectroscopy and compare it to an established alternative.

Mid-term results of a cementless hip stem in femoral revision: how much diaphyseal press-fit do we need?

Introduction: The aim of this retrospective study was to analyze the clinical and functional outcome of a modular tapered revision hip stem after mid-term follow-up with a special focus on the length of the distal bicortical fixation of the cementless hip stem.

Materials And Methods: Follow-up examination was carried out for all patients with implantation of the Prevision hip stem between 2014 and 2019 to collect demographic, functional, and radiographic data.

Results: 44 patients with stem in situ were examined, and 61 patients could be included in the Kaplan-Meier survival analysis.

Extraction of pure component spectra from ex situ illumination UV/Vis and NMR spectroscopy.

Obtaining understanding of a photochemical reaction relies on the observation, identification and quantification of the compounds involved. The photochemical properties of the individual components are of particular importance, and their determination, however, is not always trivial. This is also true for the quantitative measure on the ability to absorb light, the extinction coefficient ε if more than one species i is present and two or more species absorb light of the same wavelength.

A challenging diagnosis of narcolepsy type 2 in a patient with Duane syndrome.

Duane syndrome is a form of congenital strabismus with horizontal eye movement limitation. This may present a diagnostic challenge when assessing for rapid eye movements during stage REM utilizing PSG or MSLT. We present a case of a child with Duane syndrome who presented with excessive daytime sleepiness and underwent evaluation for hypersomnia.