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Title of article :
Tangible evidence of the tranformation from enthalpic to entropic gellan networks at high levels of co-solute
Author/Authors :
Kasapis، نويسنده , , Stefan and Abeysekera، نويسنده , , Rukmal and Atkin، نويسنده , , Neil and Deszczynski، نويسنده , , Marcin and Mitchell، نويسنده , , John R، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
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Abstract :
Transmission electron microscopy was employed to examine the hypothesis, reached earlier using rheological and thermal analysis, of the changing nature of a polysaccharide network with increasing levels of sugar. Mixtures of deacylated gellan (<1%) with low (0–20%) and high (80–85%) levels of sugar were prepared. Micrographs of the high sugar/gellan gels produced clear evidence of reduced crosslinking in the polysaccharide network, which exhibits a transition from rubber to glass-like consistency upon cooling.
Keywords :
deacylated gellan , Glass transition , sugar , reduced aggregation
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