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| ZUANAZZI,Jovana Silva Garbelini; GOES,Elenice Souza dos Reis; ALMEIDA,Fernanda Losi Alves de; GOES,Marcio Douglas; LARA,Jorge Antônio Ferreira de; RIBEIRO,Ricardo Pereira. |
| Abstract The aim of this investigation was to evaluate the impact of multiple freezing and thawing cycles on the physicochemical properties of Nile tilapia fillets. For this purpose, 72 fresh Nile tilapia fillets were packed and stored in a freezer at -18 °C. The frozen samples were submitted to five freeze-thaw cycles; in each cycle, the freezer was switched off during 14 hours. The consecutive freeze-thaw cycles resulted in a fillet’s total weight loss of 9.48%, with a quadratic regression (P < 0.0001) for thaw loss, with a greater loss percentage in cycle 3 (2.68%). pH values differed between the cycles (P < 0.0001), being observed an increment in this parameter only from cycle 4. The lipid oxidation remained constant in cycles 1, 2, 4 and 5,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Colour; Oreochromis niloticus; Lipid oxidation; PH. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005031110 |
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| ZUANAZZI,Jovana Silva Garbelini; LARA,Jorge Antonio Ferreira de; GOES,Elenice Souza dos Reis; ALMEIDA,Fernanda Losi Alves de; OLIVEIRA,Carlos Antonio Lopes de; RIBEIRO,Ricardo Pereira. |
| Abstract We evaluated the effect of the length of stay out of water on stress, gene expression, pH variation, blood parameters, histological analysis and water holding capacity (WHC) in fillets of the Nile tilapia (Oreochromis niloticus) cultivated in net-tanks. For this purpose, the fishes were maintained out of water under different periods of anoxia. Three and 6 min of anoxia in the pre-slaughter period increased the blood levels and mRNA expression of heat shock protein 70 the Nile tilapia and produced fillets with a less firm texture (greater sarcomere length). The evaluated periods of anoxia did not markedly affect pH and WHC. These results demonstrate that a pre-slaughter period of acute stress of up to 6 min does not considerably affect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HSP70; Oreochromis niloticus; PH; Sarcomere length; Water holding capacity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000100195 |
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