Shelf-life extension of vacuum-packaged sea bream (Sparus aurata) fillets by combined gamma-irradiation and refrigeration: microbiological, chemical and sensory changes
| dc.contributor.author | Chouliara I | en |
| dc.contributor.author | Sawaidis, L. N. | en |
| dc.contributor.author | Riganakos, K. | en |
| dc.contributor.author | Kontominas, M. G. | en |
| dc.date.accessioned | 2015-11-24T16:47:10Z | |
| dc.date.available | 2015-11-24T16:47:10Z | |
| dc.identifier.issn | 0022-5142 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9146 | |
| dc.rights | Default Licence | - |
| dc.subject | shelf-life | en |
| dc.subject | sea bream | en |
| dc.subject | gamma-irradiation | en |
| dc.subject | microbial-flora | en |
| dc.subject | cod fillets | en |
| dc.subject | ice storage | en |
| dc.subject | fish | en |
| dc.subject | 10-degrees-c | en |
| dc.subject | radiation | en |
| dc.subject | spoilage | en |
| dc.subject | products | en |
| dc.subject | quality | en |
| dc.title | Shelf-life extension of vacuum-packaged sea bream (Sparus aurata) fillets by combined gamma-irradiation and refrigeration: microbiological, chemical and sensory changes | en |
| heal.abstract | The combined effect of gamma-irradiation and refrigeration on the shelf-fife of vacuum-packaged sea bream (Sparus aurata) fillets was studied by monitoring the microbiological, chemical and sensory changes of non-irradiated and irradiated fish samples using low-dose irradiation doses of 1 and 3 kGy. Fish species such as sea bream and sea bass are very popular in the Mediterranean countries due to their high quality characteristics, and their preservation is a constant challenge given their extreme perishability. Irradiation (3 kGy) dramatically reduced populations of bacteria, namely, total viable counts (3 vs 7 log cfu g(-1)) for the non-irradiated samples, Pseudomonas spp (< 2 vs 7.6 log cfu g(-1)), H(2)S-producing bacteria typical of Shewanella putrefaciens (< 2 vs 5.9 log cfu g(-1)), Enterobacteriaceae (< 2 vs 6.0 log cfu g(-1)) and lactic acid bacteria (< 2 vs 3.5 log cfu g(-1)) after 10 days of storage. The effect was more pronounced at the higher dose (3 kGy). Lactic acid bacteria, Enterobacteyiaceae and H(2)S-producing bacteria typical of Shewanella putrefaciens showed higher sensitivity to gamma-radiation than did the rest of the microbial species. Of the chemical indicators of spoilage, Trimethylamine (TMA) values of non-irradiated sea bream increased very slowly, whereas for irradiated samples significantly lower values were obtained reaching a final value of 7.9 and 6.3 mg N per 100 g muscle at 1 and 3 kGy respectively (day 42). Total volatile basic nitrogen (TVB-N) values increased slowly attaining a value of 67.3 mg N per 100 g for non-irradiated sea bream during refrigerated storage, whereas for irradiated fish, lower values of 52.8 and 43.1 mg N per 100 g muscle were recorded (day 42). Thiobarbituric acid (TBA) values for irradiated sea bream samples were higher than respective non-irradiated fish and increased slowly until day 21 of storage, reaching final values of 1.1 (non-irradiated), 2.0 (1 kGy) and 2.2 mg malonaldehyde kg(-1) muscle (3 kGy), respectively (day 42). Sensory evaluation showed a good correlation with bacterial populations. On the basis of overall acceptability scores (sensory evaluation) a shelf-life of 28 days (3 kGy) was obtained for vacuum-packaged sea bream, compared with a shelf-fife of 9-10 days for the non-irradiated sample. (c) 2004 Society of Chemical Industry. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1002/Jsfa.2021 | - |
| heal.identifier.secondary | <Go to ISI>://000227690600008 | - |
| heal.identifier.secondary | http://onlinelibrary.wiley.com/store/10.1002/jsfa.2021/asset/2021_ftp.pdf?v=1&t=h0e02uji&s=f515cf72f028a890fbef1a7f67bd19919a5d9466 | - |
| heal.journalName | Journal of the Science of Food and Agriculture | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2005 | - |
| heal.publisher | Wiley | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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