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以素为基础的薄膜富含素作为生物降解基质,用于酶固定化
Elena Dembech1, Giovanna Sotgiu2,3, Anna Donnadio4
1Institute of Materials for Electronics and Magnetism, National Research Council (CNR-IMEM) Parco Area delle Scienze, 37/A 43124 Parma Italy valentina.sinisi@cnr.it.
RSC advances
|February 19, 2025
概括
这项研究从牛奶蛋白 (素) 和木材副产品 (木质素) 中开发出可生物降解的薄膜. 这些可持续的薄膜有效地固定了生物传感应用的酶.
科学领域:
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
- 环境科学 环境科学
背景情况:
- 基于石油的塑料带来环境风险,推动了对可持续替代品的需求.
- 价值化低估的生物分子,如素和素提供环保的材料开发.
- 素具有膜形成特性,而素提供抗菌,抗氧化和紫外线保护的好处.
研究的目的:
- 从素和素开发可生物降解和环保的薄膜.
- 为了研究素结合和转谷氨酸酶交叉连接对薄膜特性的影响.
- 评估这些薄膜作为酶固定基质的适用性.
主要方法:
- 素从脱脂牛奶中通过酸化分离出来.
- 准备好了素-素薄膜,并根据形态和机械性能进行了表征.
- 转胺酶 (TGM) 用于膜的共价交联.
- 在TGM交叉连接的薄膜上固定FAD依赖的葡萄糖氧化酶,以评估酶活性.
主要成果:
- 素和素-素薄膜的厚度为180-260微米,具有紧,无孔的质地.
- 素的存在影响了薄膜的机械性能,但没有改变形态.
- TGM交叉连接将薄膜的溶解率降低到40-50%,并改善了形状的保留.
- 固定葡萄糖氧化酶在几周内保持稳定和活跃,H2O2检测表明了这一点.
结论:
- 结合素和素可以产生具有较低环境影响的可生物降解薄膜.
- 经TGM交联的薄膜是稳定酶固定化的有效基质.
- 这些基于自然材料的薄膜在生物传感和宏分子检测方面提供了有前途的应用.
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