US5558856 * 1993年1月8日 1996年9月24日 Nycomed Imaging As Microbubble-generating contrast agents for ultrasound and magnetic resonance imagingUS5558856 * 1993年1月8日 1996年9月24日 Nycomed Imaging As Sulfur hexafluoride or low molecular weight fluorocarbon...
Following a step change in inspired gas composition, the increase in arterial concentrations of hydrogen, helium, methane, ethane, isobutane, and sulfur hexafluoride was determined by gas chromatography. The relative gas diffusivities encompassed a range of almost one order of magnitude. Propane, ...
The low temperature structures of sulfur hexafluoride have been investigated by molecular dynamics (MD) simulation, using the free cluster method. Clusters containing 229 molecules and having an initial BCC structure can transform either into a stable monoclinic structure identical to that of the bulk ...
Quantitative analysis of sulfur hexafluoride for molecular impurities using IR absorption spectra of solutions in liquid argonAtherosclerosisPlaque angiogenesisVascular diseasePharmacologyReceptorsNo Abstract available for this article.doi:10.1007/BF00665031L. A. Zhigula...
Sulfur hexafluoride has the slowest diffusion rate. To further decrease the diffusion rate, each sample was administered during inhalation of room air and again during brief inhalation of the same gas with which it had been incubated. RESULTS: The highest peak videointensity in the left ventricular...
The gram molecular mass is the same idea as the molar mass of a substance. The periodic table lists all of the elements' molar masses. It is the average of all of the isotopes of that element. Answer and Explanation:1 The gram molecular mass of chlorine is 35.453 g/mol.Since this is...
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Qualitatively, the ultrasound signal of CNTs was equal to that of sulfur hexafluoride (SonoVue), a commercially available contrast agent. They found that MWCNTs were highly echogenic in liver and heart through ex vivo experiments using pig as an animal model. In contrast to most of ultrasound ...
containing a liquid or solid hydrophobic barrier within the microsphere shell, and products of this process. This barrier serves to decrease the rate of gas exchange between the microsphere and the aqueous environment surrounding the microsphere and thus enhances resistance to pressure due to gas ...
Force fields for Sulfur Hexafluoride (SF 6) from the literature, were investigated by means of their ability to reproduce experimental data in a wide range of thermodynamic conditions, including liquid, gas, vapor鈥搇iquid coexistence curve as well as supercritical states. Experimental data include ...