Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 63348
Title Carbon-13 nuclear magnetic relaxation in supercooled liquid and glassy maltose
Author(s) Tromp, R.H.; Dusschoten, D.; Parker, R.; Ring, S.G.
Source Physical Chemistry Chemical Physics 1 (1999). - ISSN 1463-9076 - p. 1927 - 1931.
DOI http://dx.doi.org/10.1039/A808667B
Department(s) Biophysics
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract 13C longitudinal relaxation rates (T1-1) in highly viscous liquid and solid amorphous maltose, its mixtures with water and methanol, and also crystalline maltose monohydrate, have been measured as a function of temperature, above and below the calorimetric glass transition temperatures of the amorphous materials. From the results it is concluded that, at temperatures up to 60°C below the glass transition temperature, the carbon atoms in the exocyclic hydroxymethyl groups of maltose are more mobile than the endocyclic carbon atoms. A few percent of water is sufficient to considerably enhance amorphous maltose mobility. At temperatures close to the glass transition methanol in amorphous maltose-methanol mixtures retains a high degree of rotational mobility which is decoupled from the bulk viscosity.
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