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  • 1995-1999  (2)
  • 1997  (2)
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  • 1995-1999  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    A combined differential scanning calorimeter-optical video microscope for crystallization studies (1997)
    Springer
    Journal of thermal analysis and calorimetry 49 (1997), S. 991-998 
    Details
    ISSN: 1572-8943
    Keywords: cryo-microscopy ; crystallization ; DSC ; ICE ; microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A simultaneous differential scanning calorimeter (DSC)-optical video microscope instrument has been developed. The instrument development included slight modifications to the sample head of a Perkin-Elmer DSC-7, along with the use of a CCD camera and magnifying lenses. The instrument permitted simultaneous following of optical and thermal events during isothermal and non-isothermal DSC experiments. The DSC curves were almost identical to those given by a standard DSC-7. The operational temperature range of the instrument is between −160 to 600°C. The capabilities of the DSC-video microscope are illustrated by examples of ice crystallization data in aqueous solutions of glycerol and dimethyl sulphoxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01996785
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and properties of ambient temperature molten salts based on the quaternary ammonium ion (1997)
    Springer
    Ionics 3 (1997), S. 356-362 
    Details
    ISSN: 1862-0760
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The synthesis of 16 tetraalkyl ammonium bis(trifluoromethane sulfonyl) imide salts, are reported in this paper. Trends in properties of these salts are discussed. The symmetrical tetraalkyl ammonium salts with the bis(trifluoromethyl sulfonyl) imide anion exhibited a lower melting point than that of corresponding ammonium halides. The salts with low symmetry ammonium cations were found to be of generally lower melting point, and many were stable liquids at room temperature. Several of these did not crystallize during cooling below room temperature and exhibited glass transition temperatures in the region of −60 °C∼−80 °C. A comparison of properties between the ammonium imide salts and corresponding trifluoromethane sulfonates is also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375710
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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