Abstract
The exotherm in the DSC rewarming trace observed with frozen gels made of crosslinked dextran, Sephadex G25, was confirmed to be due to crystallisation of hexagonal ice by the two-dimensional XRD (X-Ray Diffraction)-DSC simultaneous measurement. It was indicated by the measurement that small ice crystals are readily formed in the gel, and that the endothermic trend precedent to the exotherm corresponds to the melting of small ice crystals. Moreover, two-dimensional XRD images observed with various Sephadex gels in the frozen state depended on the density of crosslink.
