Effect of chitosan molecular weight on the antimicrobial activity and release rate of carvacrol-enriched films
Effect of chitosan molecular weight on the antimicrobial activity and release rate of carvacrol-enriched films
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DOI：
10.1016/j.foodhyd.2015.04.033
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发表时间：
2015-10-01
影响因子：
10.7
通讯作者：
Coma, V.
中科院分区：
文献类型：
--
作者：
Fernandez-Pan, I.;Mate, J. I.;Coma, V.
以三种不同分子量的壳聚糖为载体制备了香芹酚可食性膜。得到了稳定的成膜分散液，其中分子量较大的壳聚糖形成的分散液具有较高的粘度和较大的香芹酚液滴。以橄榄油和96%乙醇作为食品模拟溶剂，测定香芹酚从壳聚糖基质中的释放速率。香芹酚在乙醇中的释放速度更快。此外，膜制剂中使用的壳聚糖分子量越高，对两种溶剂的释放速率越快。该薄膜对革兰氏阴性菌，腐败希瓦氏菌和嗜水气单胞菌，鱼类和海鲜产品的常见破坏者，表现出抗菌效果。因此，为了减缓香芹酚的释放速率，建议使用具有低分子量的壳聚糖和针对中低脂肪含量产品的技术应用。(C)2015爱思唯尔有限公司版权所有。
Edible films based on three types of chitosan which differ on their molecular weight were developed as carriers of carvacrol. Stable film forming dispersions were obtained and the one developed from chitosan with higher molecular weight presented higher viscosity and larger carvacrol droplets. Olive oil and 96% ethanol were used as food-simulating solvents to determine the carvacrol release rate from the chitosan matrices. The release of carvacrol was much faster when it was submerged in ethanol. Besides, the higher the chitosan molecular weight employed in the films formulation, the faster the release rate towards both solvents. The films showed antimicrobial effectiveness against the gram-negative bacteria Pseudomona fragi, Shewanella putrefaciens and Aeromonas hydrophila, common spoilers of fish and seafood products. Thus, in order to slowdown the carvacrol release rate, the use of chitosan with a low molecular weight and technical applications targeted for low-moderate fat content products is suggested. (C) 2015 Elsevier Ltd. All rights reserved.