0000000000379358
AUTHOR
Frank Petzke
showing 4 related works from this author
Immediate effects of active cranio-cervical flexion exercise versus passive mobilisation of the upper cervical spine on pain and performance on the c…
2014
This study compared the immediate effects of an assisted plus active cranio-cervical flexion exercise (exercise group) versus a passive mobilisation plus assisted cranio-cervical flexion (mobilisation group) on performance of the cranio-cervical flexion test (CCFT), cervical range of motion (ROM) and pain in patients with chronic neck pain. Eighteen volunteers with chronic idiopathic neck pain participated in the study and were randomised to one of the two intervention groups. Current level of pain, cervical ROM and pain perceived during movement, pressure pain threshold (PPT) and surface electromyography (EMG) during performance of the CCFT were measured before and immediately after the in…
Quantitative interpretation of the red edge excitation (REE) effect of 9,9′-bianthryl in polyisobutene by band shape analysis of the temperature-depe…
1994
Optical fluorescence spectra of 9,9′-bianthryl (BA) in polyisobutene (PIB) were measured as a function of the excitation wavelength at various temperatures between 210 and 293 K. Irradiation at the red edge of the absorption spectra selectively excites distinct conformers with respect to the torsional angle. This leads to a strong dependence of the vibronic band shape of the fluorescence spectra on the excitation wavelength. The marked temperature dependence of the band shape may be attributed to the viscosity-dependent deceleration of the torsional relaxation of BA in the highly viscous polymer which prevents the excited state ensemble from reaching thermal equilibrium. The predominant bro…
Investigation of molecular dimers by ensemble and single molecule spectroscopy
2002
International audience; We have investigated molecular dimers with different electronic coupling strengths by bulk and single molecule spectroscopy. In one of the dimers the two monomers (perylene-monoimide) are directly connected via a single bond while in the other one they are separated by the benzil motif. The close proximity of the monomers in the first case gives rise to excitonic band splitting which is clearly observable in the bulk absorption spectra. For the benzil structure the electronic interactions are governed by Förster-type energy hopping between the monomers. Fluorescence intensity trajectories at the single molecule level show one-step and two-step bleaching behaviour whi…
Elektrooptische Emissionsuntersuchungen, III. Das Dipolmoment von trans-p-Dimethylamino-p′-nitrostilben im ersten angeregten Singulettzustand
1977
Aus elektrooptischen Emissions- und Absorptionsuntersuchungen in flussigen und glasig erstarrten Losungen kombiniert mit dielektrischen Untersuchungen konnten u. a. das Dipolmoment und die Polarisierbarkeitskomponente in Richtung des Dipolmoments von trans-p-Dimethylamino-p′-nitrostilben (DMANS) im ersten angeregten Singulettzustand bestimmt werden zu μ0a = (63 ± 5) · 10−30 Cm und α0az = (442 ± 65) · 10−40 CV−1 m2. Es zeigte sich, das die elektrooptischen Absorptions- und Emissionsuntersuchungen an DMANS in unpolaren Losungen zu einem konsistenten Satz von Dipolmomenten fuhren, das also die Aquilibrierung mit der Umgebung nach Anre-gung im unpolaren Cyclohexan keinen Einflus auf das permane…