Cao Jie, Liu Wenru, Mei Jun, Xie Jing
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China.
National Experimental Teaching Demonstration Center for Food Science and Engineering, Shanghai Ocean University, Shanghai 201306, China.
Polymers (Basel). 2021 Dec 14;13(24):4376. doi: 10.3390/polym13244376.
This research was conducted to investigate the effect of active coatings composed of locust bean gum (LBG) and sodium alginate (SA) containing daphnetin emulsions (DEs) combined with modified atmosphere packaging (MAP) on the microbiological and physicochemical properties of turbot during 4 °C refrigerated storage for 32 days. The results revealed that LBG-SA-DE coatings together with high CO MAP (60% CO/35% N/5% O) maintained the total viable count (TVC) of HS-producing bacteria in 4-6 lg CFU/g, which is lower than the limit (7 lg CFU/g). In addition, LBG-SA-DE coatings together with high CO MAP (60% CO/35% N2/5% O) inhibited the production of odor compounds, including thiobarbituric acid (TBA), trimethylamine-nitrogen (TMA-N), K value, and total volatile basic nitrogen (TVB-N). The low-field NMR analysis (LF-NMR) and magnetic resonance imaging (MRI) indicated that LBG-SA-DE coatings together with high CO MAP (60% CO/35% N/5% O) treatments could delay the release of water located in muscle fiber macromolecules or convert it into free water based on muscle fiber destruction, thus maintaining the water content and migration. The results of the sensory evaluation showed that turbot treated with LBG-SA-DE coatings together with MAP could maintain its freshness during refrigerated storage.
本研究旨在探讨由刺槐豆胶（LBG）和海藻酸钠（SA）组成的含有瑞香素乳液（DEs）的活性涂层与气调包装（MAP）相结合对大菱鲆在4℃冷藏32天期间微生物和理化性质的影响。结果表明，LBG-SA-DE涂层与高CO气调包装（60%CO/35%N/5%O）共同作用可使产HS细菌的总活菌数（TVC）维持在4-6 lg CFU/g，低于限值（7 lg CFU/g）。此外，LBG-SA-DE涂层与高CO气调包装（60%CO/35%N₂/5%O）共同作用可抑制包括硫代巴比妥酸（TBA）、三甲胺氮（TMA-N）、K值和总挥发性盐基氮（TVB-N）在内的气味化合物的产生。低场核磁共振分析（LF-NMR）和磁共振成像（MRI）表明，LBG-SA-DE涂层与高CO气调包装（60%CO/35%N/5%O）处理可延迟位于肌纤维大分子中的水分释放，或基于肌纤维破坏将其转化为自由水，从而维持水分含量和迁移。感官评价结果表明，用LBG-SA-DE涂层和气调包装处理的大菱鲆在冷藏期间可保持其新鲜度。
