[Anesthetic management of patients in hip replacement]. / Anesteziologicheskaia zashchita pri operatsii éndoprotezirovaniia tazobedrennogo sustava.

The results of an efficiency study of the antinoceptive protection and of determination of an adaptation-reaction type in patients after total hip replacement with total intravenous or subarachnoid anesthesia and with spontaneous breathing are analyzed in the paper.

Polarized Cu K edge XANES spectra of CuO--theory and experiment.

Polarized Cu K edge x-ray absorption near-edge structure (XANES) spectra of CuO are analyzed. Partial spectral components reflecting both dipole and quadrupole transitions are resolved from the experiment. Theoretical spectra were obtained using the real-space multiple-scattering technique and by calculating the band structure via the pseudopotential method. We demonstrate that the pre-peak is of a quadrupole character and find its decomposition into individual d components. The self consistent pseudopotential calculation, free from any constraints on the form of the potential, improves the agreement between theory and experiment in those areas where real-space calculation, based on non-self-consistent muffin-tin potential, fails. Therefore we argue that the most significant contributions to the Cu K edge XANES come from one-electron processes.

Spin-resolved NEXAFS from resonant X-ray scattering (RXS).

Resonantly excited metal K core line spectra of NiO, MnO, CoO and other compounds have been investigated at the beamlines X21 (NSLS/BNL), BW1 and W1.1 (HASYLAB/DESY). From analysis of spectral data we have drawn the following conclusions: -spin conservation is valid in the scattering process, for excitations below the absorption threshold as well as above it, -the absorption thresholds are different for spin-up and spin-down components of resonantly scattered spectra, -quadrupole transitions are very important or even crucial in the excitation process. Provided that these conclusions are true, a novel technique for quantitative resolution of NEXAFS spectra into spin-up and spin-down components has been developed. Since the method employs spin conservation and local spin references, it needs no circularly polarized radiation and no sample magnetization for taking both the RXS and NEXAFS spectra. Hence antiferromagnetic and paramagnetic materials can be investigated as well. Utilizing linear dichroism by angular-dependent measurements on single-crystal samples additional resolution of NEXAFS spectra is possible with respect to the orbital symmetry. Application of the method to paramagnetic MnO, for the first time, provides new and unambiguous experimental results confirming modern (LSDA+U) calculations: The metal K pre-edge XAS of MnO has predominantly 3d(t2g and eg) spin-down character. On the other hand, the delocalized p-like states, arising from the p-d band effect hybridization have spin-up character.

Linear dichroism in 3d transition metal NEXAFS of correlated materials.

Investigations of 3d transition metal (TM) compounds by means of linear dichroism in TM K-NEXAFS will be reported. At this, the decomposition of the angular-dependent NEXAFS into orbital projected components are important problems. A survey is given on methods how to extract information on the geometrical, electronic and magnetic structure from linearly polarized NEXAFS and EXAFS spectra. New results on CuO and CuPc (Copper Phthalocyanine) are reported. A reference is given to the novel method for spin-resolving of NEXAFS by analysis of resonantly scattered X-ray core lines.