Shelf-life extension of cod fillets with an acetate buffer spray prior to packaging under modified atmospheres
作者:
G. Boskou,
J. Debevere,
期刊:
Food Additives & Contaminants
(Taylor Available online 2000)
卷期:
Volume 17,
issue 1
页码: 17-25
ISSN:0265-203X
年代: 2000
DOI:10.1080/026520300283559
出版商: Taylor & Francis Group
关键词: Acetate;Buffer;Spray;Modified;Atmosphere;Packaging;Spoilage;Shelf-life
数据来源: Taylor
摘要:
Fresh cod fillets (Gadus morhua) were sprayed with a 10% acetate buffer (pH 5.6), packed with an industrial gas-flushing packaging machine under modified atmospheres (50% CO2-45% O2-5% N2, 2cm3/1g gas/ product ratio) and stored at 7°C for 12 days. Control cod fillets were directly packed and stored under the same conditions. A reduction of the aerobic plate counts was observed immediately after the cod fillets had been sprayed. During storage under modified atmospheres, there was complete inhibition of H2S-producing bacteria and Enterobacteriaceae in the treated cod fillets. Production of total volatile bases and trimethylamine (TMA) was inhibited in treated fillets for 10 days' storage under modified atmospheres. Inhibition of TMA production can be attributed to growth inhibition of H2S-producing bacteria, inhibition of the trimethylamine oxide (TMAO)-dependent metabolism of TMAO-reducing bacteria and the stable pH during storage. The shelf-life, at 7°C, of treated cod fillets, based on cooked flavour score, was almost 12 days, ca 8 days more than shelf-life of the control fillets.
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