To study the effect of the fruit/syrup proportion, the banana slices were kept in the sugar syrup (67 °Brix) in fruit/syrup proportionsproportions of 1:1; 1:2; 1:3 and 1:4. Moisture loss was determined at intervals de 2, 5, 8, 10 and 18 hours.
The effect of agitation was evaluated by treating the banana slices with 67 °Brix syrup, having a fruit/syrup proportion of 1:1 for 2, 6 and 8 hours, in two conditions: with and without agitation.
The moisture content was determined in an oven at 70 °C, under vacuum (AOAC, 2000). All the samples of banana partially dehydrated by osmosis were finally dehydrated using a cabinet dryer (Fabbe-Primar, Model 170), equipped with forced air circulation, for 6 hours, when the quality of the dried product was considered to be optimum.
For the adjustment of the drying behavior of the bananas, the equilibrium moisture content could be disregarded in relation to the initial moisture content (dry basis). Thus Equation 1, for the kinetic adjustment of drying, was used in the following form (Equation 2):
To study the effect of the fruit/syrup proportion, the banana slices were kept in the sugar syrup (67 °Brix) in fruit/syrup proportionsproportions of 1:1; 1:2; 1:3 and 1:4. Moisture loss was determined at intervals de 2, 5, 8, 10 and 18 hours.The effect of agitation was evaluated by treating the banana slices with 67 °Brix syrup, having a fruit/syrup proportion of 1:1 for 2, 6 and 8 hours, in two conditions: with and without agitation.The moisture content was determined in an oven at 70 °C, under vacuum (AOAC, 2000). All the samples of banana partially dehydrated by osmosis were finally dehydrated using a cabinet dryer (Fabbe-Primar, Model 170), equipped with forced air circulation, for 6 hours, when the quality of the dried product was considered to be optimum.For the adjustment of the drying behavior of the bananas, the equilibrium moisture content could be disregarded in relation to the initial moisture content (dry basis). Thus Equation 1, for the kinetic adjustment of drying, was used in the following form (Equation 2):
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