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cf. CA 55, 23400c. The Cu salt decompn. of diazo compds. in the presence of Ph3P opens up a new path to the synthesis of phosphorus-ylides. Ph3P (10 millimoles) and 10 millimoles 0.6M CH2N2 in Et2O treated 15 min. with 1 millimole anhyd. CuCl in 70 ml. tet ...
This work describes ion temperature measurements made by means of Doppler line broadening in a rotating magnetic field pinch experiment. A 12-channel Fabry-Perot interferometer has been constructed and profiles of various helium and impurity lines were mea ...
cf. CA 50, 10030g. The stationary ligands on the P were varied in order to obtain an insight into the mechanism of the carbonyl-olefination with triphenylphosphylenes. The results demonstrated that the substitution of the Ph by p-MeC6H4, p-MeOC6H4, piperid ...
Centrifugal pumps are required to sustain a stable operation of the system they support under all operating conditions. Minor modifications of the surfaces defining the pump's water passage can influence the tendency to unstable system operation significan ...
Technetium-99m-d,l-hexamethylpropylene amine oxime ((99m)Tc-HMPAO) retention in the brain monitored by single photon emission computed tomography (SPECT) is currently used as a marker of cerebral blood flow. The purported mechanism by which (99m)Tc-HMPAO a ...
The amt. of Vitreoscilla Hb (VHb) expression was modulated over a broad range with an isopropyl-beta-D-thiogalactopyranoside- (IPTG)- inducible plasmid, and the consequences on microaerobic Escherichia coli physiol. were examd. in glucose fed-batch cultiva ...
Experimental results are presented of the mean flow and turbulence characteristics in the near field of a plane wall jet issuing from a nozzle onto flat and concave walls consisting of fixed sand beds. This is a flow configuration of interest for sediment ...
The central hypothesis of the study which has been carried out as part of the NRP38 program, is that perturbations of brain energy metabolism are critically involved in the neurodegeneration occurring in Alzheimer's disease (AD) and that they may correlate ...
To characterize the boundary layer development, in the cone of the Francis turbine, wall friction and velocity measurements are performed. The mean wall friction measurements evidence the increasing risk of the boundary layer separation at the cone wall wi ...
International Association For Hydraulic Research2004
The purpose of this study was to investigate astrocytic oxidative metabolism using 1-(11)C-acetate. 1-(11)C-acetate kinetics were evaluated in the rat somatosensory cortex using a beta-scintillator during different manipulations (test-retest, infraorbital ...
