by the invariability of L and chroma parameter (both almost
constant in the present study). For a given value of moisture
content in pineapple dehydrated at different temperatures,
similar l-ascorbicacidcontentwasfoundat60and75◦
C;however, at 45◦
C and the same moisture content, l-ascorbic acid
content was higher. The rehydration rate of dried pineapple
increases with the rehydration temperature and it reduces
when the drying pre-processing was carried at higher temperature, indicating a greater rehydration rate in pineapple
dried at 45◦
C thatin pineapple dried at 75◦
C. The Page equation gave a good statistical fit to rehydration experimental
data, with low values of mean percentage error, 2.6–4.1%.
Changes in mechanical properties are little affected by the
drying temperature. Nevertheless, results would indicate that
the fruit tissue dried at high temperature has a greater firmness.