Mollazehi, S. (2015) Effect of sodium phosphates on the quality of Otolithes rubber fillet during frozen storage. Masters thesis, University of Zabol.
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Abstract
The aim of this study was to evaluate the effect of sodium phosphates on shelf life of Otolithe rubber fillet during frozen storage (-18 ° C). Croaker fish fillets were immersed into the solution of sodium Tripoli phosphate (2 and 5%), sodium Hexameta phosphate (2 and 5%), mixture of sodium Tripoli phosphate, and sodium Hexameta phosphate (2%) for 10 minutes. Then vacuum was packed in polyethylene bags and was frozen in freezing tunnel (-40) and stored at (-18°C) for 6 months. Physical (pH, Water holding capacity, drip after thawing and cooking), chemical (PV, TBA, TVB-N, TMA), microbial parameters (Total viable bacterial and psychrophilic total counts) and sensory analysis were measured at zero time every months. The results showed that by using sodium phosphates and increasing time the WHC was increased significantly (p≤0.05). The PV, TBA and TVB-N values of sodium Tripoli phosphate (5%) were lower than the other treatments (p≤0.05). TMA values of control and STP (5%) were 2.93 and 1.83 mg/ml at sixth month, respectively. The TVC and PTC of fillets were significantly (p≤0.05) decreased during the frozen storage. Sensory evaluation results showed that, the acceptance of treated fillets were higher than control one, thus the score of STP (5%) was higher than the others. Therefore the STP (5%) treatment is recommended for Otolithe rubber fillet during frozen storage (-18 ° C).
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Sodium phosphates, Otolithe rubber, Drip loss, Water holding capacity |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 24 Apr 2016 05:48 |
| Last Modified: | 24 Apr 2016 05:48 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/497 |
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