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Updated: Jul 23, 2026

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Bridging the Bio-Electronic Interface with Biofabrication
Published on: June 6, 2012
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基于的共价固定剂的制造
1Department of Chemistry of Natural and Microbial Products, National Research Centre, El-Behooth St., Dokki, Giza, Egypt; Centre of Scientific Excellence-Group of Advanced Materials and Nanotechnology, National Research Centre, El-Behooth St., Dokki, Giza, Egypt.
International journal of biological macromolecules
|February 11, 2025
概括
用聚乙烯胺和甲修饰的皮膜可以为β-galactosidase等酶产生有效的固定剂. 由此产生的不动化的β-银酸酶显示出显著增强的稳定性和活性,成功降解乳清透中的乳糖.
科学领域:
- 生物材料科学 生物材料科学
- 酶固定化 酶固定化
- 生物催化剂是一种生物催化剂.
背景情况:
- 酶固定对于工业生物催化剂至关重要,增强稳定性和可重复使用性.
- (CG) 由于其独特的特性,为酶固定提供了作为生物材料的潜力.
- 开发高效和稳定的固定器需要优化处理参数.
研究的目的:
- 开发和优化共价固定剂,使用糖 (CG),聚乙烯胺 (PEI) 和谷氨 (GA) 进行蛋白质酶 (PR) 和β-银酸酶 (β-GAL).
- 评估和比较固定β-GAL (iβ-GAL) 和PR的运行稳定性.
- 描述优化的iβ-GAL固定装置的特性.
主要方法:
- 优化CG/PEI/GA处理用于β-GAL和PR固定,使用Box-Behnken设计.
- 将β-GAL和PR固定在经过修改的CG电影上.
- 评估固定酶的运行稳定性,pH和活性概况,热稳定性和储存稳定性.
- 使用里埃变换红外光谱学 (FTIR),能量分散式X射线光谱学 (EDX) 和扫描电子显微镜 (SEM) 的表征.
主要成果:
- β-GAL 固定化的最佳条件:5.43% PEI,pH 8.32,其次是 6.02% GA.
- 对于PR固定的最佳条件:1.5%PEI,pH9.52,其次是10%GA.
- 固定β-GAL (iβ-GAL) 显示了显著增强的操作稳定性,在14次运行后保持了93.29%的活性.
- 与自由β-GAL相比,iβ-GAL表现出更好的热,储存,溶剂和重金属稳定性.
- 在6个循环中,iβ-GAL成功地降解了乳糖在乳清透中.
结论:
- GA/PEI/CG系统提供了一种有效的方法,用于为酶制造稳定的共价固定剂.
- 固定β-GAL表现出卓越的操作和各种稳定性增强,使其适合工业应用.
- 优化的固定化策略对食品加工中的应用具有前景,例如乳糖降解在乳清透中.
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