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通过亚临界水提取利用甜菜废物的价值化,用于开发活性食品包装材料
Márcia Correa de Carvalho1,2, Pedro A V Freitas1, Rosa J Jagus3
1Institute of Food Engineering Food UPV, Universitat Politècnica de València, 46022 Valencia, Spain.
Molecules (Basel, Switzerland)
|May 14, 2025
概括
甜菜根叶和茎 (BLS) 通过亚临界水提取 (SWE) 产生抗氧化剂提取物. 这些提取物增强了聚合物薄膜,改善了向日油的保存,特别是在聚乳酸 (PLA) 薄膜中.
科学领域:
- 农业科学 农业科学
- 食品科学 食品科学 食品科学
- 材料科学 材料科学 材料科学
背景情况:
- 农业废物的利用,特别是甜菜根叶和茎 (BLS),对于可持续的做法至关重要.
- 具有抗氧化特性的活性化合物可以从植物生物质中提取.
- 聚合物薄膜用于食品包装,以延长保质期.
研究的目的:
- 从BLS中提取活性化合物,使用亚临界水提取 (SWE).
- 将这些提取物纳入热塑性粉 (TPS) 和聚乳酸 (PLA) 薄膜中.
- 为了评估这些薄膜的抗氧化特性和保护日油的有效性.
主要方法:
- 在150°C和170°C的BLS中进行亚临界水提取 (SWE).
- 包括提取物 (6%重量) 在其中. 在TPS和PLA聚合物矩阵中.
- 提取物 (总,贝他林,激素清除能力) 和薄膜 (颜色,紫外线阻断,氧气透性,水蒸气透性) 的表征.
- 对日油氧化保护的评估.
主要成果:
- 获得了高提取产量 (60-67%) 和显著的抗氧化活性 (总:51-73毫克GAE·g-1,EC50:30-22毫克mg-1DPPH).
- 更高的提取温度 (170°C) 增加了含量和抗氧化能力.
- 片表现出色彩和紫外线阻特性.
- 提取物在PLA薄膜中降低了氧气透性 (OP),但在TPS薄膜中增加了它.
- 含有提取物的PLA薄膜显著地保护了向日油免受氧化,与OP降低有关.
结论:
- SWE有效地从BLS中提取生物活性化合物.
- BLS提取物可用于制造抗氧化聚合物膜.
- 与BLS提取物相结合的PLA薄膜显示出保护向日油免受氧化,特别是由于氧气透率降低的承诺.
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