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Effect of physical osmosis methods on quality of tilapia fillets processed by heat pump drying

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Li M., Wu J.-J., Guan Z.-g.

Polish Journal of Food and Nutrition Sciences

2017

tom 67

nr 2

In order to achieve the influence of different pretreatment methods on heat pump dried tilapia fillets, the effects of trehalose, ultrasound-assisted and freeze-thaw cycle assisted osmotic dehydration on the color, rehydration, texture and Ca2+-ATPase activity were investigated. Tilapia fi llets (100 mm length × 50 mm width × 5 mm height) were first osmoconcentrated in a trehalose solution combined with 4°C under atmospheric pressure for 1 h, different power of ultrasound and freeze-thawing respectively, then heat pump dried. The results showed that under the same drying method, the comprehensive score of ultrasound in 400 Watt was best, compared to freeze-thaw, the ultrasound pretreatment had a significant (p<0.05) effect on the color and Ca2+-ATPase activity, but had no significant (p>0.05) effect on the rehydration and texture. However, both of them significantly (p<0.05) affected the quality in comparison to that of osmosis at 4°C. It indicates that suitable ultrasonic pretreatment conditions improve the quality of dried products effectively and the conclusion of this research provides reference for heat pump dried similar products.

Ograniczanie wyników

1 Polish Journal of Food and Nutrition Sciences

1 Guan Z.-g.

1 Li M.

1 Wu J.-J.

1 2017

Wyniki wyszukiwania

Effect of physical osmosis methods on quality of tilapia fillets processed by heat pump drying