Skin is an important by-product during the processing of tilapia, which is a productive warm-water fish. The skin produced during the process is not well utilized at present due to the pigment, even though the production is large. In the current study, the rehydration conditions of dry tilapia skin were investigated. Through response surface methodology, lactic acid concentration, time, and temperature were shown to have significant effects on the rehydration ratio of dry tilapia skin. The optimal rehydration ratio was obtained by incubating the dry tilapia skin in 63.2 per cent (w/v) lactic acid at 29.8 deg C for 7.0 h. The P and R2 values indicated that the response surface model had a good fit to the practical behaviour. H2O2 oxidation was an effective decolouration technique for tilapia skin. Furthermore, ultrasonic treatment could apparently accelerate the tilapia skin decolouration by H2O2. A combination of 6 per cent (w/v) H2O2 and 10 h (or 15 per cent H2O2 and 8h) resulted in the formation of white skin. This research will favour application of tilapia skin in the food industry.


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    Title :

    Rehydration and ultrasonic-assisted decolouration of dry tilapia (Oreochromis niloticus) skin


    Contributors:
    Wang, L. (author) / Yang, B. (author) / Deng, P. (author) / Zhang, J. (author)


    Publication date :

    2010


    Size :

    6 Seiten, 3 Bilder, 3 Tabellen, 23 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English