相关实验视频
Updated: Jun 12, 2026
10:08
Fabrication of Large-area Free-standing Ultrathin Polymer Films
Published on: June 3, 2015
15.2K
活性多乳酸 (PLA) 片含有杏仁皮提取物用于食品保存
Laia Martin-Perez1, Carolina Contreras1, Amparo Chiralt1
1Institute of Food Engineering Food UPV, Universitat Politecnica de Valencia, Camino de Vera s/b, 46022 Valencia, Spain.
Molecules (Basel, Switzerland)
|May 14, 2025
概括
杏仁皮提取物增强聚乳酸 (PLA) 膜,减少汁和向日油等食品中的氧化. 虽然这些活性包装薄膜不是抗菌,但通过减缓降解,它们对食品的保存有很大的希望.
科学领域:
- 食品科学 食品科学 食品科学
- 材料科学 材料科学 材料科学
- 农业副产品价值化 农业副产品价值化
背景情况:
- 杏仁皮提取物具有抗氧化和抗微生物特性,这是由于化合物.
- 亚临界水提取是从植物材料中获得生物活性化合物的有效方法.
- 活性包装旨在通过将功能成分纳入包装材料来延长食品的保质期.
研究的目的:
- 开发活性聚乳酸 (PLA) 薄膜,其中包含杏仁皮提取物,用于食品保存.
- 描述开发的基于PLA的薄膜的物理,机械,屏障,光学和热性能.
- 评估活性薄膜的抗氧化和抗微生物功效及其在延长食品保质期方面的潜力.
主要方法:
- 杏仁皮在160°C和180°C下进行亚临界水提取.
- 将杏仁皮提取物纳入PLA薄膜 (PLA-E160,PLA-E180) 中.
- 薄膜的特性 (微观结构,机械,屏障,光学,热).
- 对化合物和HFM释放到食品仿真剂的评估.
- 对包装汁和向日油的保质期研究.
主要成果:
- 使用杏仁皮提取物的PLA薄膜显示了变化的微观结构,降低了机械阻力,增加了伸展性和更暗的外观.
- 化合物和HFM释放在95%乙醇仿真剂中较高.
- 活性膜显著降低了汁和向日油中的氧化降解.
- 在体外或体内没有观察到显著的抗微生物活性.
结论:
- 杏仁皮提取物可以纳入PLA膜,以创建具有抗氧化特性的活性包装.
- 这些活性PLA薄膜有效地减少易受食物产品的氧化恶化.
- 可能需要进一步的研究来增强活性化合物的释放,以提高抗微生物药物的有效性.
相关概念视频
01:27Principles of Food Preservation
Food spoilage results from microbial growth, enzymatic activity, and environmental factors that gradually degrade the sensory, nutritional, and safety qualities of food. Preservation techniques aim to slow or halt these processes to extend shelf life and maintain product quality.A key concept in food microbiology is the microbial growth curve, which includes four phases: lag, exponential (log), stationary, and death. During the lag phase, bacteria adjust to their environment without significant...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...