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  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamics of molecular interactions in ethyl iodide+toluene mixtures (1991)
    Springer
    Journal of solution chemistry 20 (1991), S. 531-538 
    Details
    ISSN: 1572-8927
    Keywords: Molecular interaction ; excess Gibbs free energy of mixing ; ideal associated model ; equilibrium constants ; thermodynamics of mixtures ; binary mixtures ; interactions in solutions ; applicability of Flory theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The excess Gibb's free energy of mixing, GE, for ethyl iodide+toluene at 25°C have been obtained from the measured vapor pressuure data. The HE and GE values for ethyl iodide+toluene are positive throughout the ethyl iodide concentration range and GE〉HE. The results have been analyzed in terms of Flory and ideal associated model theory of nonelectrolyte solutions. It has been observed that the ideal associated model approach which assumes the presence of AN and A2B molecular species describes well (within±10 J-mol−1 in the worst case) the general dependence of HE on XA (mole fraction of ethyl iodide) over the whole composition range for ethyl iodide+toluene mixtures. The equilibrium constants for A+A⇆ AB and 2A+B⇆A2B reactions along with the enthalpies of formation of AB and A2B molecular species have been calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650807
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  • 2
    Electronic Resource
    Electronic Resource
    The value of intraoperative scans during CT-guided stereotactic procedures (1992)
    Springer
    Neuroradiology 34 (1992), S. 453-456 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Stereotaxis ; Biopsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Sumamry The accuracy stereotactic procedures performed during the pre-computed tomography (CT) era was confirmed by intraoperative X-ray pictures. With the availability of CT it is now possible to confirm the position of the probe-tip on an image of the target. For biopsy of small lesions in critical areas of the brain, permanent placement of radioactive seeds, or thalamotomy, it would be desirable to have confirmation of the site of the probetip prior to performing the main step of the procedure. Intraoperative CT was performed in 216 stereotactic procedures carried out on the scanner table including biopsies, aspiration of cysts, brachytherapy, aspiration of abscesses, thalamotomy, and evacuation of intracerebral hematoma. In 6 cases, inaccuracies were detected, which it was possible to correct so as to place the probe where desired.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00596518
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    Paper (German National Licenses)
    Fulltext
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