阿根廷鱿鱼生化成分的分析研究

本文对阿根廷鱿鱼主要生化成分进行分析和比较。研究表明：阿根廷鱿鱼营养丰富，食用价值高；但鱿鱼的持水性差、弹性弱。     

不同贮藏温度下阿根廷鱿鱼内源性甲醛及相关物质的变化规律

探究不同贮藏温度下阿根廷鱿鱼内源性甲醛及相关物质的变化规律,研究了4 ℃、0 ℃、-20 ℃贮藏条件下鱿鱼体内甲醛(FA)、二甲胺(DMA)、三甲胺(TMA)、氧化三甲胺(TMAO)、氧化三甲胺脱甲基酶活性(TMAOase)、肌原纤维蛋白溶解度、菌落总数的变化。结果表明,随着贮藏时间的延长,鱿鱼体内FA、DMA、TMA和菌落总数呈现上升趋势;TMAO和蛋白溶解度呈现下降趋势;在4 ℃和0 ℃下TMAOase活性呈先上升后平缓的趋势,-20 ℃下TMAOase活性呈先上升后略微降低的趋势;各温度下的甲醛含量和氧化三甲胺脱甲基酶(TMAOase)酶活之间具有显著相关性(r4 ℃=0.791,r0 ℃=0.863,r-20℃=0.825)。本研究为不同贮藏条件下甲醛的控制提供了理论基础。     

Gamma radiation effect on quality changes in vacuum‐packed squid (Illex argentinus) mantle rings during refrigerated (4–5 °C) storage

The effect of gamma radiation (0, 1.8, 3.3 and 5.8 kGy) on microbiological, chemical and colour characteristics of vacuum‐packed squid (Illex argentinus) mantle rings was studied. Total viable counts; psychrotrophic bacteria counts, Escherichia Coli, Staphylococcus aureus and Clostridium perfringens; total volatile basic nitrogen (TVBN) and colour difference were analysed during 29 days of storage at 4–5 °C. Higher doses of gamma radiation significantly reduced Total Viable, phychrotrophic counts and TVBN production (P < 0.05) in a dose‐dependent way, delaying squid spoilage. Colour difference of non‐irradiated samples with respect to first day significantly increased while it was constant in radiated samples during 22 days (P < 0.05). Independently from the dose, radiation avoided colour changes of squid rings. Gamma irradiation was effective in delaying deterioration reactions, improving microbiological, chemical and colour quality of vacuum‐packed squid rings stored at 4–5 °C.     

调味阿根廷滑柔鱼烤制休闲食品加工工艺优化

目的 优化调味阿根廷滑柔鱼烤制休闲食品加工工艺。方法 以感官评分、硬度、弹性、咀嚼性等为指标,通过单因素考察结合正交实验优化调味配方和烤制工艺,采用电子舌和电子鼻分别测试调味烤制产品的风味和滋味,并对产品的微生物限量进行测评。结果 最佳工艺参数为:食盐1.0%、白糖7%、烧烤料1.3%、生抽2%、老抽0.5%、料酒2%,烤制时间8 min、烤制温度180℃、鱿鱼圈厚度4 mm,产品质地富有弹性、色泽均匀、咀嚼性良好、腥味减少、香味和滋味增加。经真空包装、灭菌的产品符合GB 10136—2015《食品安全国家标准动物性水产制品》“微生物限量”要求。结论 最佳工艺下调味阿根廷滑柔鱼烤制休闲食品的感官品质良好、具有独特风味和滋味,安全卫生。本研究为阿根廷滑柔鱼预制食品的进一步开发提供了技术和理论支持。     

The effect of modified atmosphere packaging on the microbiological,physical, chemical and sensory characteristics of broadtail squid (Illex coindetii)

The aim of this work was to evaluate the effect of various atmosphere compositions (20% CO₂/80% N₂ for modified atmosphere packaging (MAP) 1, 50% CO₂/50% N₂ for MAP 2, 70% CO₂/30% N₂ for MAP 3 and vacuum packaging) on the microbial (mesophiles, psychrophiles, Pseudomonas spp., Brochothrix thermosphacta and Enterobacteriaceae), physical, chemical [trimethylamine (TMA) and total volatile basic nitrogen (TVBN)] and sensorial characteristics of broadtail squid (Illex coindetii) stored for 10 days at 2 ± 1 °C. All microbial populations were severely restrained by MAP 3 with the exception of Enterobacteriaceae, which seemed to take advantage of the lack of competitive microflora and had enhanced microbial counts on MAP samples (P < 0.05). Colour attributes were better maintained on MAP‐stored samples. Drip loss was less on vacuum‐packaged squids. MAP 2 was the best atmosphere for the preservation of tissue consistency. TMA and TVBN formation was limited by high CO₂ atmospheres, even though both elevated in all studied conditions. Shelf life based on sensory characteristics was determined to be 10, 8, 6, 6 and 4 days for MAP 3, MAP 2, MAP 1, vacuum and control samples, respectively.