Quality changes of the Mediterranean horse mackerel (Trachurus mediterraneus) during chilled storage: The effect of low-dose gamma irradiation
Quality changes of the Mediterranean horse mackerel (Trachurus mediterraneus) during chilled storage: The effect of low-dose gamma irradiation
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DOI：
10.1016/j.radphyschem.2008.12.004
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发表时间：
2009-04-01
影响因子：
2.9
通讯作者：
Barkallah, Insaf
中科院分区：
文献类型：
--
作者：
Mbarki, Raouf;Sadok, Saloua;Barkallah, Insaf
就数量而言，中上层鱼类是地中海的主要渔业。然而，由于各种原因，例如其高度易腐性以及冰和冷冻设施的缺乏或供应不足，中上层鱼类的浪费和腐败是大量的。在这项工作中，新鲜的地中海竹荚鱼（竹荚鱼mediterranean竹荚鱼）在1和2 kGy的辐射，并在冰中储存18天。通过微生物计数、三甲胺（TMA）和挥发性盐基氮含量的测定，跟踪贮藏过程中的品质变化。类似地，进行脂质组成和感官分析。辐照处理有效地降低了整个储存期间的细菌总数。总碱性挥发性氮含量（TVB-N）和TMA水平增加，在所有批次的存储时间，其浓度显着降低辐照，即使当使用较低的水平（1 kGy）。根据质量指数法，对照批次的感官保质期为4天，而辐照批次的感官保质期延长了5天。此外，低近距离照射对地中海竹荚鱼营养重要的多不饱和脂肪酸（PUFA）没有不良影响。以同样的方式，硫代巴比妥酸反应物质的值增加与照射在第一天，但这些值是较低的存储结束时，与对照组相比。结果证实了使用伽马辐照作为冷藏的附加过程的实际优势，以提高微生物质量和延长小型远洋物种的保质期。(C)2008爱思唯尔有限公司保留所有权利。
Pelagic fishes represent the main Mediterranean fisheries in terms of quantity. However, waste and spoilage of pelagic fish are substantial for a Variety Of reasons, Such as their high perishability and the lack or inadequate supply of ice and freezing facilities. In this work, fresh Mediterranean horse mackerel (Trachurus mediterraneus) were irradiated at 1 and 2 kGy and stored in ice for 18 days. Quality Changes during storage were followed by the determination of microbial Counts, trimethylamine (TMA) and volatile basic nitrogen contents. Similarly, lipid composition and sensory analysis were carried out. Irradiation treatment was effective ill reducing total bacterial Counts throughout Storage. Total basic volatile nitrogen content (TVB-N) and TMA levels increased in all lots with storage time, their concentrations being Significantly reduced by irradiation, even when the lower level (1 kGy) was used. According to the quality index method, the control lot had a sensory shelf-life of 4 days, whereas those of the irradiated lots were extended by 5 days. Also, low-close irradiation had no adverse effect oil the nutritionally important polyunsaturated fatty acids (PUFA) of Mediterranean horse mackerel. In the same way, thiobarbituric acid-reactive substances values increased with irradiation during the first day, but these Values were lower at the end of-storage, compared to the control. Results confirm the practical advantages of using gamma irradiation as in additional process to chilled storage to enhance the Microbiological quality and to extend the shelf-life of small pelagic species. (C) 2008 Elsevier Ltd. All rights reserved.