Abstract
Differential scanning calorimetry (DSC) was used to determine phase transitions of freeze-dried camu-camu pulp in a wide range of moisture content. Samples were equilibrated at 25°C over saturated salt solutions in order to obtain water activities (a w) between 0.11–0.90. Samples with a w>0.90 were obtained by direct water addition. At the low and intermediate moisture content range, Gordon–Taylor model was able to predict the plasticizing effect of water. In samples, with a w>0.90, the glass transition curve exhibited a discontinuity and T ’ g was practically constant (–58.8°C), representing the glass transition temperature of the maximally concentrated phase(T g ).
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da Silva, M.A., Sobral, P.J.A. & Kieckbusch, T.G. Water sorption and glass transition of freeze-dried camu-camu (myrciaria dubia (H.B.K.) Mc Vaugh) pulp. J Therm Anal Calorim 84, 435–439 (2006). https://doi.org/10.1007/s10973-005-7111-z
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DOI: https://doi.org/10.1007/s10973-005-7111-z