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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
    Solubility and glass transition in the system α-D-trehalose/water (1997)
    Springer
    Journal of thermal analysis and calorimetry 49 (1997), S. 817-822 
    Details
    ISSN: 1572-8943
    Keywords: glass transition ; phase diagram ; solubility ; trehalose ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precipitation of trehalose dihydrate in water is observed at room temperature for trehalose concentrations higher than 47.5%w/w. Direct observations of crystal melting in water and measures of the solution density determine the thermal variations of trehalose saturationS(T) (mM) in water: ln(S(T))=ln(0.1223)-(1330/T) withR 2 =0.9982. The glass transition (Tg) curve measured by DSC is lower at low concentrations and higher at high concentrations than previously reported.T g is also measured as a function of the cooling/warming rates. Analysis of specific heat changes atT g and associated activation energy leads to identify a most stable glassy state around the second eutectic concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01996765
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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