The reaction of methylcarbonate ionic liquids with H2S or H2Se offers a highly selective synthesis of analytically pure, well-defined and soluble hydrosulphide and hydroselenide organic salts of general interest. Among them, imidazolium hydrochalcogenides show an astonishingly high volatility for cation-aprotic ILs, which allows their quantitative sublimation below 100 °C/10(-2) mbar and actual...

Isoflurane is a haloginated ether, is stable when stored and is presented as 99.9% pure product. The absence of a preservative make vaporisation more efficient and it is very unlikely that moving parts of the vaporiser will stick. The physical properties of isoflurane are similar to those of halothane. The minimum alveolar concentration (MAC) of isoflurane in the different target species is det...

A laser vaporisation source and a time-of-flight mass spectrometer are used for the production and detection of TiArn Ž . clusters. Parallel, density functional theory DFT calculations assist in extracting the structures of the first members of the series. The mass spectrum is dominated by one intense line of TiAr , for which the DFT calculations predict a regular 6 octahedron. q 1999 Elsevier ...

Thulium laser vapo-enucleation of the prostate is the latest addition to the arsenal of minimally invasive therapies available for the surgical treatment of lower urinary tract symptoms secondary to benign prostate hyperplasia. The potential advantages include smoother vaporisation, a clearer visual field and the option of both continuous-wave and pulsed modes, which also potentiate the haemost...

The mechanisms by which carbon nanotubes nucleate and grow remain poorly understood. This paper reviews the models which have been proposed to explain nanotube growth in the arc-evaporation and laser-vaporisation processes. Many of the early models assumed that growth is a gas phase phenomenon but there is growing experimental evidence that the formation of both multiwalled and single-walled tu...

INTRODUCTION Photoselective vaporisation of the prostate (PVP) is a surgical alternative to transurethral resection of the prostate (TURP). The goal of this study was to compare the new AMS MOXY fiber which provide 180 watts power to the 4090 fiber 120 watts power source currently used in benign prostatic hyperplasia. The assessment criteria were peroperative and early postoperative data. MET...