An improved setup for radial diffraction experiments at high pressures and high temperatures in a resistive graphite-heated diamond anvil cell.

We present an improved setup for the experimental study of deformation of solids at simultaneous high pressures and temperatures by radial x-ray diffraction. This technique employs a graphite resistive heated Mao-Bell type diamond anvil cell for radial x-ray diffraction in combination with a water-cooled vacuum chamber. The new chamber has been developed by the sample environment group at PETRA III and implemented at the Extreme Conditions Beamline P02.2 at PETRA III, DESY (Hamburg, Germany). We discuss applications of the new setup to study deformation of a variety of materials, including ferropericlase, calcium perovskite, bridgmanite, and tantalum carbide, at high-pressure/temperature.

The Extreme Conditions Beamline P02.2 and the Extreme Conditions Science Infrastructure at PETRA III.

A detailed description is presented of the Extreme Conditions Beamline P02.2 for micro X-ray diffraction studies of matter at simultaneous high pressure and high/low temperatures at PETRA III, in Hamburg, Germany. This includes performance of the X-ray optics and instrumental resolution as well as an overview of the different sample environments available for high-pressure studies in the diamond anvil cell. Particularly emphasized are the high-brilliance and high-energy X-ray diffraction capabilities of the beamline in conjunction with the use of fast area detectors to conduct time-resolved compression studies in the millisecond time regime. Finally, the current capability of the Extreme Conditions Science Infrastructure to support high-pressure research at the Extreme Conditions Beamline and other PETRA III beamlines is described.

An x-ray setup to investigate the atomic order of confined liquids in slit geometry.

A setup has been designed to investigate thin films of confined liquids with the use of X-ray scattering methods. The confinement is realized between the flat culets of a pair of diamonds by positioning and orienting the lower diamond with nanometer and micro radian accuracy. We routinely achieve gaps between 5 and 50 nm at culet diameters of 200 µm. With this setup and a micro focused X-ray beam we have investigated the in-plane and the out-off-plane atomic order of benzene with atomic resolution.

[Quality of life after treatment of head and neck tumors : longitudinal comparison after operation and adjuvant radio(chemo)therapy]. / Lebensqualität nach Therapie von Kopf-Hals-Tumoren : Longitudinaler Vergleich von Operation und adjuvanter Radio(chemo)therapie.

BACKGROUND: Quality of life is extraordinary affected by malignant tumors of the head and neck region as functions of social interaction are disturbed. MATERIALS AND METHODS: The influence of surgical treatment and postoperative radio(chemo)therapy (RCT) on the quality of life was studied in patients with head and neck cancer. Twenty patients treated with curative intention completed the questionnaires EORTC QLQ-C30 and EORTC QLQ-H&N35 at three time points. RESULTS: In most questions, patients reported poorer quality of life after RCT compared to postoperatively. Most of these differences were not significant. However, global quality of life and overall health was significantly worse after RCT as compared to postoperatively. CONCLUSION: Both operation and postoperative RCT, lead to decreased quality of life in patients with a head and neck cancer. In comparison, RCT seems to have a more pronounced effect on the quality of life than operative therapy.