نتایج جستجو برای: xenon
تعداد نتایج: 5239 فیلتر نتایج به سال:
The noble gases are the most inert group of the periodic table, but their reactivity increases with pressure. Diamond-anvil-cell experiments and ab initio modelling have been used to investigate a possible direct reaction between xenon and oxygen at high pressures. We have now synthesized two oxides below 100 GPa (Xe2O5 under oxygen-rich conditions, and Xe3O2 under oxygen-poor conditions), whic...
BACKGROUND Cardiopulmonary bypass (CPB) is associated with leucocyte and platelet activation and also organ dysfunction. Xenon has been found to have organ-protective effects. We therefore investigated the effect of isolated CPB on leucocyte and platelet activation and the efficacy of xenon in inhibiting these changes. METHODS Isolated CPB was conducted according to strict standardized clinic...
BACKGROUND Moderate cooling after birth asphyxia is associated with substantial reductions in death and disability, but additional therapies might provide further benefit. We assessed whether the addition of xenon gas, a promising novel therapy, after the initiation of hypothermia for birth asphyxia would result in further improvement. METHODS Total Body hypothermia plus Xenon (TOBY-Xe) was a...
We plan to determine the bulk viscosity of xenon 10 times closer [in reduced temperature τ = (T-Tc)/Tc] to its liquid-vapor critical point than ever before. (Tc is the critical temperature.) To do so, we must measure the dispersion and attenuation of sound at frequencies 1/100 of those used previously. In general, sound attenuation has contributions from the bulk viscosity acting throughout the...
I would like to compliment Drs Gobbel, Cann, and Fike for their continued efforts to extract quantitative cerebral blood flow information from computed tomography (CT)based technologies. Because CT continues to be a universally used first screening technology, efforts to expand the information obtained from the initial visit to the CT scanner are warranted. The ability to extract vital cerebral...
Introduction. It is a consensus that the postoperative cognitive function is impaired in elderly patients after general anaesthesia, and such category patient takes more time to recover. Xenon is a noble gas with anesthetic properties mediated by antagonism of N-methyl-D-aspartate receptors. With a minimum alveolar concentration of 0.63, xenon is intended for maintaining hypnosis with 30% oxyge...
BACKGROUND Four nursing mothers consented to anaesthesia for urgent surgery only on condition that their ability to breast feed would not be impaired. METHODS Following induction of general anaesthesia with propofol and remifentanil, 65-69% xenon supplemented with remifentanil was used as an inhalational anaesthetic for maintenance. RESULTS After finishing surgery the women could be extubat...
Experimental and theoretical studies of HXeI and HXeH molecules in Ar, Kr, and Xe matrices are presented. HXeI exhibits the H-Xe stretching bands at 1238.0 and 1239.0 cm(-1) in Ar and Kr matrices, respectively, that are blue-shifted from the HXeI band observed in a Xe matrix (1193 cm(-1)) by 45 and 46 cm(-1). These shifts are larger than those observed previously for HXeCl (27 and 16 cm(-1)) an...
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