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Determination of shelf-life of vacuum-packed sea bream (Sparus aurata) fillets using chitosan-microparticles-coating
CyTA - Journal of Food ( IF 2.0 ) Pub Date : 2020-01-06 , DOI: 10.1080/19476337.2019.1696893
Meriam Khemir 1, 2 , Nadia Besbes 1 , Ines Ben Khemis 3 , Calogero Di Bella 4 , Daniela Lo Monaco 4 , Saloua Sadok 1, 2
Affiliation  

ABSTRACT

Chitosan-microparticles (CM)-coating (CMC) effect on quality and shelf-life of vacuum-packed sea bream (Sparus aurata) fillets was investigated at 0.2% and0.5% (w/w) doses comparatively to untreated control, during refrigerated storage (24 days). Analysis concerned total mesophilic bacteria counts (TMC), total psychrophilic bacteria counts (TPC), proximate composition, pH, total volatile basic nitrogen (TVB-N), trimethylamine (TMA), thiobarbyturic acid (TBA), and fatty acids (FA). Two-way ANOVA and multiple comparison were applied, factors being storage time and treatment. Bacterial counts exceeded the limit in control but remained below in CMC lots. All of TVB-N, TMA and TBA increased faster and reached higher values in control compared to CMC lots, with dose-dependent effect. CMC preserved quality in terms of proximate composition and FA. The 0.5%-CM dose prolonged the shelf-life up to 12 days, corresponding to a two folds extension. CMC showed antimicrobial and antioxidant properties and should be recommended for preserving the quality of fish fillets.



中文翻译:

壳聚糖-微粒包衣法测定真空包装的鲷鱼片的保质期

摘要

壳聚糖微粒(CM)涂层(CMC)对真空包装鲷鱼(Sparus aurata)的质量和保质期的影响在冷藏期间(24天),与未处理的对照组相比,以0.2%和0.5%(w / w)的剂量研究了鱼片。分析涉及中温细菌总数(TMC),嗜冷细菌总数(TPC),附近成分,pH,总挥发性碱性氮(TVB-N),三甲胺(TMA),硫代巴比妥酸(TBA)和脂肪酸(FA) 。应用了两次方差分析和多重比较,因素是储存时间和处理。细菌数量超过了对照的限制,但仍低于CMC批次。与CMC批次相比,所有TVB-N,TMA和TBA的增长速度更快,并且在对照中达到更高的值,且具有剂量依赖性。CMC在邻近的成分和FA方面保持质量。0.5%-CM剂量可将保质期延长至12天,相当于延长了两倍。

更新日期:2020-04-20
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