Title: The physical state of water at low temperatures in plasma with different water contents as studied by differential thermal analysis and differential scanning calorimetry
Abstract: Differential thermal analysis (DTA) and differential scanning calorimetry (DSC) have been used for a study of the physical state of water at low temperatures in freeze-dried blood plasma rehydrated to different water contents. Measurement of the amplitude of the specific heat change accompanying the glass transition, the quantity of ice formed during rewarming, and the total ice content in the sample provided a determination of the extent of crystallization in water at low temperatures. Even after slow cooling or annealing, a fraction of water remained incorporated in an amorphous phase. It is suggested that the unfreezable water (0.47 g per g of dry substance) could be divided into two more or less distinct species: 0.25 g per g is the minimum water content above which the system can gain enough mobility to give rise to a detectable glass transition.
Publication Year: 1975
Publication Date: 1975-06-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
Access and Citation
Cited By Count: 50
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