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分子印迹磁性荧光复合微球的制备及其性能研究

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分子印迹磁性荧光复合微球的制备及其性能研究
Preparation and Properties of Molecularly Imprinted Magnetic Fluorescent Composite Microspheres
投稿时间:2019-04-04
DOI:10.15918/j.tbit1001-0645.2019.112
中文关键词:分子印迹磁性荧光复合微球蛋白质分离
English Keywords:molecularly imprinted technologymagnetic fluorescent nano-spheresprotein separation
基金项目:
作者单位
罗爱芹北京理工大学 生命学院, 北京 100081
陈炜杰北京理工大学 生命学院, 北京 100081
张鑫北京理工大学 生命学院, 北京 100081
刘红阳北京理工大学 生命学院, 北京 100081
李园园北京理工大学 生命学院, 北京 100081
孙立权北京理工大学 生命学院, 北京 100081
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中文摘要:
复杂生物体系中蛋白质的高效分离分析在生物分离、蛋白质纯化与检测等生命科学研究领域中具有重要的意义.本文以磁性荧光复合微球(Fe3O4MNP-ZnSQDs)为载体,利用表面印迹技术在Fe3O4MNP-ZnSQDs表面构建"核-壳"结构的磁性荧光蛋白印迹微球(Fe3O4MNP-ZnSQD@MIPs),并用于溶菌酶蛋白的快速分离.结果表明,制备的Fe3O4MNP-ZnSQD@MIPs具有分散性好、粒径均一、荧光发射强、磁响应明显等特点.在最优条件下,该印迹微球在15 min达到吸附平衡,最大吸附容量可达645.76 m g· g-1,饱和磁强度为40 em u· g-1,且具有良好的选择性,印迹因子为2.15.该磁性荧光分子印迹微球成本低、耗时短、使用简单、吸附量高且选择性好,可用于大批量样品检测中溶菌酶的快速分离与纯化.
English Summary:
Rapid and effective separation of protein in complex biological samples is very important in the field of life science research, such as biological separation, protein purification and so on. In this study, Fe3O4MNP-ZnSQDs were used as carriers, and lysozyme was chosen as template protein. The molecularly imprinted polymer was coated on the surface of the Fe3O4MNP-ZnSQDs to form magnetic fluorescent micro-spheres via surface imprinting process. The experiment results show that Fe3O4MNP-ZnSQD@MIPs possesses better dispersibility, uniform particle size and strong fluorescence emission, which can be rapidly separated under external magnetic field. Under optimum conditions, the adsorption equilibrium of Fe3O4MNP-ZnSQD@MIPs can be achieved in 15 minutes, and the maximum adsorption capacity is 645.76 m g· g-1, the saturation magnetic intensity is 40 em u· g-1. Moreover, the prepared Fe3O4MNP-ZnSQD@MIPs possesses adsorption selectivity, and the imprinting factor is 2.15. The advantages of the prepared Fe3O4MNP-ZnSQD@MIPs include low cost, fast analysis process, convenience and large adsorption capacity. It can be used for rapid separation and purification of lysozyme in complex biological sample.
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