Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Int J Biol Macromol. 2013 Jan;52:116-24. doi: 10.1016/j.ijbiomac.2012.08.026. Epub 2012 Aug 30.
The present work was aimed at characterizing biodegradable composite kappa-carrageenan films incorporated with Satureja hortensis (SEO) in terms of their physical, optical, mechanical, barrier and antioxidant properties. Also, in a comparative study, we sought to evaluate the antimicrobial effectiveness of these films against five pathogens. The films' water vapor barrier properties were found to improve considerably upon the addition of SEO. Carrageenan composite films were less resistant to breakage, more flexible and more opaque with lower gloss than the control film. These results can be explained by the film's microstructure, which was analyzed by atomic force microscopy and scanning electron microscopy. The films incorporating SEO showed good antioxidant properties; this effect was greatly improved when the proportion of added SEO was 3%. Films with SEO effectively inhibited the five microorganisms tested. The results of the present study suggest that SEO as a natural antibacterial agent can potentially be used in packaging a wide range of food products, particularly those that are highly oxidative and microbial sensitive.
本工作旨在对加入了薰衣草（SEO）的可生物降解的角叉菜胶复合薄膜进行物理、光学、机械、阻隔和抗氧化性能方面的表征。此外，我们还进行了一项对比研究，以评估这些薄膜对五种病原体的抗菌效果。研究发现，加入 SEO 后，薄膜的水蒸气阻隔性能得到了显著改善。角叉菜胶复合薄膜的断裂阻力降低，柔韧性增加，透明度降低，光泽度降低，而对照薄膜则保持不变。这些结果可以通过原子力显微镜和扫描电子显微镜分析薄膜的微观结构来解释。加入 SEO 的薄膜具有良好的抗氧化性能，当添加的 SEO 比例为 3%时，这一效果得到了极大的提高。含有 SEO 的薄膜能有效抑制五种测试微生物。本研究结果表明，SEO 作为一种天然抗菌剂，有可能被用于包装各种食品，特别是那些高度氧化和微生物敏感的食品。
