کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
70957 | 48857 | 2007 | 7 صفحه PDF | دانلود رایگان |

A new aminated carrier—magnetic nanogels covered by amino groups, was obtained by Hoffman degradation of polyacrylamide-coated Fe3O4 nanoparticles prepared by photochemical polymerization. α-Chymotrypsin (CT) was covalently bound to the magnetic nanogels by use of 1-ethyl-3-(3-dimethylaminepropyl) carbodiimide and N-hydroxysuccinimide at room temperature. Immobilization time, pH value of the reaction mixture and proportion of CT to the magnetic nanogels were investigated to obtain the optimum condition for CT immobilization. The maximal specific activity of the bound CT was determined to be 0.93 U/(mg min), 59.3% of free counterpart. The maximal binding capacity was measured to be 102 mg enzyme/g nanogel. Furthermore, the bound CT exhibited good thermal stability, storage stability and reusability.
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 45, Issues 3–4, 30 April 2007, Pages 84–90