mango powders is 91.03 g/100 g sample (w.b.). Fig. 2 shows the
glass transition temperature associated with the amorphous soluble
compounds (sugars) in mango samples containing unfreezable
water (i.e., low moisture) based on the DSC heat flow curve.
Thermal transitions of mangoes containing unfreezable water
The freeze-dried mangoes can be considered a high-solid carbohydrate
matrix (sugars). The total sugar content as soluble solids of This figure exhibits only the portion of the thermograms around
the glass transition temperature for mango at a moisture content
of 0.087 g water/g sample (w.b.). The onset Tgi and final Tge points
of transitions were obtained by extrapolating the side and base
lines as shown in Fig. 2. All of the thermograms for samples with
low moisture contents (Xw 6 0.14) exhibited one transition and
shown no formation of ice and no ice melting endotherm. Similar
thermograms were also observed by