Yu Dawei, Jiang Qixing, Xu Yanshun, Xia Wenshui
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
Int J Biol Macromol. 2017 Aug;101:448-454. doi: 10.1016/j.ijbiomac.2017.03.038. Epub 2017 Mar 8.
A novel chitosan-based coating solution was prepared by combining glycerol monolaurate (GML) for shelf life extension of refrigerated grass carp fillets. The control and coated fillets were analyzed periodically for physicochemical (pH, thiobarbituric acid (TBA) value, total volatile basic nitrogen (TVB-N) value, K value, and shear force), microbiological (total viable counts (TVC), psychrophilic bacteria counts (PTC), Pseudomonads and HS-producing bacteria) and sensorial characteristics. The results showed that chitosan-GML coated samples presented better quality preservation effects than chitosan coating alone. In addition, 2% chitosan enriched with 0.3% GML showed the significant (P<0.05) effectiveness in inhibiting microbial growth, nucleotide breakdown, the formation of alkaline components and texture deterioration, and maintaining sensory acceptability among the groups. These findings confirmed that chitosan coating enriched with GML was a promising method to extend the shelf life of refrigerated fillets.
通过将月桂酸甘油单酯（GML）与壳聚糖混合制备了一种新型的涂层溶液，用于延长冷藏草鱼鱼片的保质期。定期对对照鱼片和涂有涂层的鱼片进行理化性质（pH值、硫代巴比妥酸（TBA）值、总挥发性盐基氮（TVB-N）值、K值和剪切力）、微生物学（总活菌数（TVC）、嗜冷菌数（PTC）、假单胞菌和产HS菌）和感官特性分析。结果表明，壳聚糖-GML涂层样品比单独的壳聚糖涂层具有更好的品质保存效果。此外，富含0.3%GML的2%壳聚糖在抑制微生物生长、核苷酸分解、碱性成分形成和质地劣化以及保持各组之间的感官可接受性方面显示出显著（P<0.05）的效果。这些发现证实，富含GML的壳聚糖涂层是延长冷藏鱼片保质期的一种有前途的方法。
