Osmotic dehydration (OD) is one of most important complementary treatment and food preservation technique in the processing of dehydrated foods, since it presents some benefits such as reducing the damage of heat to the flavor, color, inhibiting the browning of enzymes and decrease the energy costs. Osmotic dehydration results in increased shelf-life, little bit loss of aroma in dried and semidried food stuffs, lessening the load of freezing and to freeze the food without causing unnecessary changes in texture. It has been reported that osmotic dehydration reduced up to 50% weight of fresh vegetables and fruits. (Moazzam Rafiq Khan, 2012)
Osmotic dehydration is the process of water removal by immersion of water containing cellular solids (fruits/vegetables) in a concentrated aqueous solution of sugar/ salt. This results in intermediate moisture product with lower water activity. At low water activity, most of the chemical reactions which deteriorate the food, the growth and toxins production by microorganisms are ceased. Besides, it improves the colour, flavour and texture and is less energy intensive process compared air or vacuum drying process as no phase change takes place during the moisture removal from the substrate. (N. Sutar, 2013) (P.P.Sutar, 2013)
Osmotic dehydration (OD) is one of most important complementary treatment and food preservation technique in the processing of dehydrated foods, since it presents some benefits such as reducing the damage of heat to the flavor, color, inhibiting the browning of enzymes and decrease the energy costs. Osmotic dehydration results in increased shelf-life, little bit loss of aroma in dried and semidried food stuffs, lessening the load of freezing and to freeze the food without causing unnecessary changes in texture. It has been reported that osmotic dehydration reduced up to 50% weight of fresh vegetables and fruits. (Moazzam Rafiq Khan, 2012)Osmotic dehydration is the process of water removal by immersion of water containing cellular solids (fruits/vegetables) in a concentrated aqueous solution of sugar/ salt. This results in intermediate moisture product with lower water activity. At low water activity, most of the chemical reactions which deteriorate the food, the growth and toxins production by microorganisms are ceased. Besides, it improves the colour, flavour and texture and is less energy intensive process compared air or vacuum drying process as no phase change takes place during the moisture removal from the substrate. (N. Sutar, 2013) (P.P.Sutar, 2013)
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