Evaluation of an ozone-slurry ice combined refrigeration system for the storage of farmed turbot (Psetta maxima)
8 páginas, 5 figuras, 2 tablas The use of ozonised slurry ice was investigated as a new refrigeration system for the storage of farmed turbot (Psetta maxima). With this purpose in mind, an ozone generator device was coupled to a slurry ice system working subzero at 1.5 C. The ozone concentration was...
| Published in: | Food Chemistry |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Elsevier
2006
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10261/51059 https://doi.org/10.1016/j.foodchem.2005.03.040 |
| Summary: | 8 páginas, 5 figuras, 2 tablas The use of ozonised slurry ice was investigated as a new refrigeration system for the storage of farmed turbot (Psetta maxima). With this purpose in mind, an ozone generator device was coupled to a slurry ice system working subzero at 1.5 C. The ozone concentration was adjusted to a redox potential of 700 mV, and the slurry ice biphasic mixture was prepared at a 40% ice/60% water ratio and 3.3% salinity. Certain biochemical parameters indicative of fish freshness, such as the rate of nucleotide degradation or TMA-N formation, were not significantly affected by the presence of ozone in the slurry ice mixture. However, storage in ozonised slurry ice significantly slowed down the mechanisms responsible for lipid hydrolysis and lipid oxidation in farmed turbot. Storage in ozonised slurry ice also led to significantly (p < 0.05) lower counts of both total aerobes and psychrotrophic bacteria in both turbot muscle and skin, as compared with the control batch stored without ozone. Sensory analyses confirmed an extended shelf life of turbot specimens stored in ozonised slurry ice; these maintaining ‘‘A’’ sensory quality up to day 14, while the counterpart batch stored in slurry ice kept this quality only up to day 7. The combination of ozone and slurry ice may be recommended for the chilling and storage of farmed turbot with a view to extending its shelf-life. This work was supported by a project granted by the Secretarı´a Xeral de I + D from the Xunta de Galicia (Project PGIDT01MAR40202PR). Peer reviewed |
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