Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6404286 | LWT - Food Science and Technology | 2014 | 6 Pages |
â¢HPP effectively inhibited microbial growth and increased the lag phase during storage at 4 °C.â¢HPP retarded the formation of TMA, DMA, and BA in raw octopus.â¢HPP is a promising alternative technology for extending the shelf life of raw octopus.
This study evaluated the effects of high-pressure treatment on microbial growth and production of off-flavor compounds in raw octopus during 16 days of refrigerated storage. Chopped raw octopus samples were treated at 150, 300, 450, and 600Â MPa for 6Â min using high-pressure laboratory food processing equipment. The number of psychrotrophic bacteria on day 16 was reduced by 0.1, 0.5, 1.3, and 2.8Â CFU/g after pressure treatment at 150, 300, 450, and 600Â MPa, respectively, as compared with control group. The amounts of trimethylamine (TMA) and dimethylamine (DMA) produced in the chopped raw octopus treated at 600Â MPa was significantly reduced by 42.5% and 62.2%, respectively, as compared to the levels in the control. The production of biogenic amines (BAs) increased up to 1.82Â mg/g in the control after 12 days of refrigerated storage, while the BA levels in the 450Â MPa- and 600Â MPa-treated octopus were 1.40 and 1.35 mg/g, respectively. Thus, high-pressure treatment effectively inhibited microbial growth and suppressed the formation of off-flavor compounds in raw octopus. High-pressure treatment is a promising alternative technology for extending the shelf life of raw octopus.