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Effect of carboxyl density at the core–shell interface of surface-imprinted magnetic trilayer microspheres on recognition properties of proteins
來源:張秋禹教授個人網(wǎng)站 發(fā)布日期:2014-11-14
作者:Xiangjie Li, Baoliang Zhang, Lei Tian, Wei Li, Tiejun Xin, Hepeng Zhang, Qiuyu Zhang
關鍵字:Surface imprinting, Carboxyl density,Protein recognition, Magnetic microspheres
論文來源:期刊
具體來源:Sensors and Actuators B: Chemical
發(fā)表時間:2014年

A novel protein surface-imprinted magnetic trilayer composite microsphere (Fe3O4@HEA@protein-MIPs) was designed and prepared. The objective of this study was to study the effect of carboxyl density at the core–shell interface on recognition performance. The imprinting process was carried out on the surface of Fe3O4@hydroxyethyl acrylate (Fe3O4@HEA) microsphere modified by maleic anhydride (MAH) in the presence of functional monomer acrylamide (AM) and cross-linker N,N′-methylenebisacrylamide (MBA). The results revealed that the adsorption rate, adsorption capacity and recognition capacity of surface-imprinted magnetic microsphere increased with increasing carboxyl density. Meanwhile, the increase of carboxyl density was conducive to improve the imprinting efficiency of the proteins with high isoelectric point (pI > 7). Furthermore, the effect of carboxyl at the core–shell interface on imprinting efficiency was restricted by the thickness of imprinted layer, and the critical thickness which related to the size of template protein was obtained by experiments.

全文鏈接:http://www.sciencedirect.com/science/article/pii/S0925400514001348

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