Shelf life assessment of modified atmosphere packaged rainbow trout (Oncorhynchus mykiss) fillets during Storage in Refrigerator

khanlar, M. A. (2014) Shelf life assessment of modified atmosphere packaged rainbow trout (Oncorhynchus mykiss) fillets during Storage in Refrigerator. Masters thesis, University of Zabol.

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The object of this thesis was determination effects of three different packing methods including: modified atmosphere, vacuum and Normal packaging on the Shelf life of trout fillets. For this purpose rainbow trout fillets in terms of modified atmosphere packaging was Packaged with three different atmospheres (A, 10/40/50 %O2/CO2/N2; B,10/60/30%O2/CO2/N2 ; C,10/80/10 % O2/CO2/N2), Vacuum (D) and Normal packaging conditions (E) were stored at 4 °C and monitored over 18 days. Quality of rainbow trout fillets on days 0, 3, 6, 9, 12, 15 and 18 were assessed by microbial (total viable counts, psychotropic counts), physical (drip loss, pH, colour CIE Lab) and chemical parameters (total volatile basic nitrogen (TVBN), Thiobarbituric acid (TBA). The results showed that all chemical and biological parameters increased during storage. With larger increasing amounts of CO2 in the treatment parameters of TBA, TVB-N, pH, TVC, in treatments C and B than the other treatments (P <0/05). Color index results in MAP packaging compared to other treatments showed a higher level. Promote collapse package the negative aspects of treatment C, which can lead to rejection of the product by the consumer. Increase of undesirable chemical, physical and bacterial control samples and samples from the early days of vacuum between the ninth and twelfth days of storage done, while MAP packages particularly treatments B and C stayed intact until the eighteenth day storage. Given the limits of biological results showed that the B and C gas mixtures, of trout fillets, cause about 6 days increase in shelf life at room temperature under vacuum packaging C˚ 4.

Item Type: Thesis (Masters)
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Depositing User: admin admin1 admin2
Date Deposited: 07 Nov 2016 07:42
Last Modified: 07 Nov 2016 07:42

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