Effect of Pretreatments and Solar Tunnel Dryer Zone on Drying Characteristics and Stability of Pumpkin (Cucurbita maxima) Slices

Figure 2

Moisture ratio of pumpkin slices versus time at different pretreatment conditions for zone I of the drier (a), zone II of the drier (b), and zone III of the drier (c). Pretreatments are 1% citric acid solution for 20 minutes, 2% salt solution for 20 minutes, and blanched in 1% salt solution at 65 °C for 2 minutes.

(a)

(b)

(c)