College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
Food Res Int. 2023 Jan;163:112293. doi: 10.1016/j.foodres.2022.112293. Epub 2022 Dec 5.
Nature-derived chemicals have recently gained increased attention to settle down the challenges in the food industry. Quercetin has long been used as a natural medicine but its photoactivity has been neglected. In this work, by combining photodynamic bacteria inactivation (PDI) with an edible coating (Pectin/Quercetin) derived from FDA-approved chemicals, extend shelf-life and protected commercial quality of fresh-cut apples were achieved. Firstly, the potential photoactivated antibacterial performance of Quercetin (a natural plant flavonoid) was clarified with the treatment of a simulated sunlight lamp, realizing antibacterial efficacy of 100 % towards S. aureus (50 min) and L. monocytogenes (80 min) with light treatment. To develop safe and effective preservation of fresh-cut apples, Pectin/Quercetin edible coatings with 100 μmol/L quercetin were adopted. The results showed that the prepared edible coatings form a protective barrier over the surface of apples, effectively resisting bacterial infection and extending shelf life to 10 days while maintaining good commercial quality (including preferable color, keeping 100 % hardness, 80 % sugar content and 17.3 % weightlessness rate). Therefore, the prepared light-driven Pectin/Quercetin in this work has the potential to develop as fresh-cut fruit preservation technology.
天然来源的化学物质最近受到了越来越多的关注，以解决食品工业中的挑战。槲皮素长期以来一直被用作天然药物，但它的光活性一直被忽视。在这项工作中，通过将光动力细菌灭活（PDI）与由 FDA 批准的化学品衍生的可食用涂层（果胶/槲皮素）相结合，延长了货架期并保护了鲜切苹果的商业质量。首先，通过模拟阳光灯处理，阐明了槲皮素（一种天然植物类黄酮）的潜在光激活抗菌性能，实现了对金黄色葡萄球菌（50 分钟）和单核细胞增生李斯特菌（80 分钟）的 100%抗菌功效。为了开发安全有效的鲜切苹果保鲜方法，采用了含有 100 μmol/L 槲皮素的果胶/槲皮素可食用涂层。结果表明，所制备的可食用涂层在苹果表面形成了一层保护性屏障，有效抵抗细菌感染，将货架期延长至 10 天，同时保持良好的商业质量（包括较好的颜色，保持 100%的硬度，80%的糖含量和 17.3%的失重率）。因此，本工作中制备的光驱动果胶/槲皮素有望开发成为鲜切水果保鲜技术。
