Drying was conducted using a labora

Drying was conducted using a laboratory convective dryer
(Warsaw, Poland). Process was carried out at 70 C and air velocity
2 m/s. The air flow was parallel to the net which the samples were
placed on. The dryer was previously heated to the set-point temperature
and then loaded with 0.2 kg (1 kg/m2
) carrot slices, which
were spread on a one shelve in a single layer. Changes of the samples
mass during drying were continuously recorded with a balance
and by a program ‘‘Pomiar’’ (Radwag, Radom, Poland) with
accuracy of ±0.1 g, until constant weight was reached. Drying
experiments were carried out in a triplicate.
The effective water diffusion coefficient (Deff) was calculated
using TableCurve 2D v5.01 software on the basis of the simplified
Fick’s diffusion equation [3