A method for the determination of the oxygen content in magnesium and magnesium alloys has been developed. Inert gas fusion-infrared absorptiometry was modified by introducing a multistep heating process; a sample containing oxygen is fused with tin to form an eutectic mixture at 900°C in a graphite crucible, followed by a subsequent gradual temperature increase of up to 2000°C, which enables t...

Sentinel lymph node biopsy (SLNB) has been reliably accurate as a minimally invasive surgical alternative for identifying lymphatic breast metastasis. During mapping, the injection of a radioactive tracer or isosulfan blue dye to differentiate the SLN is acutely painful. The use of the eutectic mixture of lidocaine and prilocaine (EMLA) cream to reduce tracer injection pain has been reported an...

Many biological membranes adapt in response to environmental conditions. We investigated how the composition and architecture of photosynthetic membranes of a bacterium change in response to light, using atomic force microscopy. Despite large modifications in the membrane composition, the local environment of core complexes remained unaltered, whereas specialized paracrystalline light-harvestin...

The local structure of trace amounts of lead in an adsorbent matrix that contains a high concentration of iron and magnesium (Mg6Fe2(OH)16(CO3) x 3H2O) was successfully monitored by means of X-ray absorption fine structure spectroscopy combined with fluorescence spectrometry. A eutectic mixture of PbCO3 and Pb(OH)2 coagulated when Pb2+ was adsorbed from a 1.0 ppm aqueous solution, and in contra...

Differential heating curves were used to study the behavior of calcium sulfate at high temperatures. After cooling, the material was examined by means of the petrographic microscope and by study of its X-ray pattern. It was found that the beta-to-alpha transition of calcium sulfate occurs at approximately 1,214° C, and the conclusion of i ts discoverer that the high temperature form is unstable...

Some salts such as alkali metal and silver per chlorates, cobaltchloride and their complexes with ligands such as acetone, acetonitrile,dimethylsulphoxide, pyridine, and N-methyl and N,N dimethyl formamidesdissolve in thermotropic nematic liquid crystals providing information onthe metal-ion ligand interactions. The H, H and the metal ion resonanceshave been used to derive t...

Molecular dynamics simulation (MD) has been done for a molten (Li, K)C1 mixture of the eutectic composition at about 700 K, 950 K and 1100 K and, for comparison, also for pure LiCl and KCl at about 950 K and 1100 K The atomic masses of half the Li and K ions have been set at 6.941 and 39.098, respectively. Self-exchange velocities (SEVs) of these cations have been calculated. The Chemla effect ...

Ag-28.1 wt. % Cu eutectic alloy solidifies in the form of eutectic dendrite at undercooling above 76 K. The remelting and ripening of the original lamellar eutectics result in the formation of the anomalous eutectics in the final microstructure. The addition of the third element Sb (0.5 and 1 wt. %) does not change the growth mode, but enlarges the volume fraction of anomalous eutectics because...

A dorsal penile nerve block (DPNB), ring block (RB), and eutectic mixture of local anesthetics (EMLA) all control pain effectively during neonatal circumcision (strength of recommendation [SOR]: A, systematic review). An RB may provide superior pain relief to DPNB and EMLA (SOR: B, limited-quality evidence). Using a Mogen clamp reduces pain by shortening procedure time (SOR: A, randomized contr...

The efficacy of a topical anaesthetic formulation, EMLA 5% cream (Eutectic Mixture of Local Anaesthetics) in obtunding the pain produced by venepuncture, was determined in a double-blind randomized, cross-over study in 31 adult volunteers. Pain was registered on a 10-cm visual analogue scale. In each subject the mean pain score after treatment with EMLA was compared with that following placebo....