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首页> 外文期刊>LWT-Food Science & Technology >Development of gel-based pads loaded with lysozyme and green tea extract: Characterization of pads and test of their antilisterial potential on cold-smoked salmon
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Development of gel-based pads loaded with lysozyme and green tea extract: Characterization of pads and test of their antilisterial potential on cold-smoked salmon

机译：用溶菌酶和绿茶提取物的凝胶基垫的研制：垫子垫的表征及其在冷烟熏三文鱼上的抵抗力测试

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摘要

The objective of this work is to develop antilisterial gel-based pads (g-pad) for active packaging of cold-smoked salmon. Lysozyme (LYS) and/or green tea extract (GTE) (1% w/w) were incorporated into g-pads of gelatin (GEL), and its mechanically improved composite g-pads obtained by mixing GEL with rice starch (GEL/RS) or candelilla wax (GEL/CW). GEL g-pad with LYS and GEL/RS g-pad with LYS or LYS + GTE, and GEL/CW g-pad with LYS + GTE caused >= similar to 1.8 and similar to 1.7 log reduction in broth media against Listeria innocua within 11 and 15 days, respectively. All g-pads with LYS or LYS + GTE inhibited L. innocua growth, and gave cold-smoked salmon with 1.5-1.9 log lower Listeria load than controls after 15 days at +4 degrees C. GEL g-pad with LYS was the most potent on salmon surface since it achieved faster LYS release (1.3-1.8-fold) than other g-pads. Sustained release of GEL/RS g-pads for LYS, and GEL/CW g-pads for GTE was promising for extended storage. Composite g-pads were more compatible with GTE than GEL g-pads since they prevented discoloration of polyphenols. Water absorption capacities showed that GEL/RS g-pads (75%) could prevent drip-loss better than GEL (59%) and GEL/CW (57%) g-pads. Active g-pads provide alternative to active edible films to reduce listeriosis from processed high-risk food.
机译：这项工作的目的是为冷熏鲑鱼的主动包装开发基于抵抗力凝胶的垫（G垫）。将溶菌酶（Lys）和/或绿茶提取物（GTE）（1％w / w）掺入明胶（凝胶）的G垫中，并通过将凝胶与水稻淀粉混合（凝胶/）而获得的机械改进的复合G垫RS）或Candelilla蜡（凝胶/ CW）。带有Lys或Lys + GTE的凝胶和凝胶/ RS G垫，以及带有Lys + GTE的凝胶/ CW G-PAD，导致> =类似于1.8，类似于肉汤媒体的1.7日志减少，对抗Listeria Innocua分别为11和15天。含有Lys或Lys + GTE的所有G垫抑制了L.Innocua生长，并给予了1.5-1.9 Log婴儿婴儿床较低的李斯特菌，比在+4摄氏度+ 4摄氏度下的凝胶G垫上的控制量最大鲑鱼表面有效，因为它达到比其他G垫更快的Lys释放（1.3-1.8倍）。用于Lys的凝胶/ RS G焊盘的持续释放，并且用于GTE的凝胶/ CW G焊盘对延长的存储有前途。复合G焊盘与GTE比凝胶G焊盘更相容，因为它们阻止了多酚的变色。吸水能力表明，凝胶/ RS G焊盘（75％）可以防止液滴损失优于凝胶（59％）和凝胶/ CW（57％）G垫。活性G垫提供有源可食用薄膜的替代方案，以减少加工高风险食物的缺失。

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