2.5. Convective air drying
The apple slices were dehydrated in an electric oven (Drying
oven, model FP53, Binder GmbH, Germany), with proper heat control and ventilation, at various drying air temperature: 30, 45, and
65C. In order to ensure maintenance of set upC, it was monitored oven temperature using a calibrated oven thermometer.
Slices were spread in a single layer on the tray. The mass of the
samples are measured using the digital balance before starting
the drying procedure. In each drying experiment, about 90 g (three
apple slices) fresh material was dried at an air flow speed of
1.5 ± 0.2 ms
1
. Three replicates are carried out for each experiment
and during air drying, weight and temperature of the sample are
recorded until invariable weight (total 8 h).
2.5. Convective air dryingThe apple slices were dehydrated in an electric oven (Dryingoven, model FP53, Binder GmbH, Germany), with proper heat control and ventilation, at various drying air temperature: 30, 45, and65C. In order to ensure maintenance of set upC, it was monitored oven temperature using a calibrated oven thermometer.Slices were spread in a single layer on the tray. The mass of thesamples are measured using the digital balance before startingthe drying procedure. In each drying experiment, about 90 g (threeapple slices) fresh material was dried at an air flow speed of1.5 ± 0.2 ms1. Three replicates are carried out for each experimentand during air drying, weight and temperature of the sample arerecorded until invariable weight (total 8 h).
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