title: Reversible immobilization of glucose oxidase on polyaniline grafted polyacrylonitrile conductive composite membrane.
abstract: Polyacrylonitrile membrane surfaces were modified with chemical polymerization of conductive polyaniline. The effect of aniline concentration on the grafting efficiency was investigated. As the amount of grafted PANI increased on the PAN membrane, the electrical resistance of composite membrane decreased. Composite (PAN/PANI)-1-5 membrane were used for reversible immobilization of GOD. The immobilization efficiency and the activity of the immobilized GOD were increased with increasing PANI contents of the composite membrane. The maximum amount of immobilized enzyme into composite PAN/PANI-5 membrane containing 2.1% PANI was about 251 microg/cm(2). Immobilized GOD exhibited 66% of its original activity even after two months of storage at 4 degrees C while the free enzyme lost its initial activity after three weeks.
authors.affiliation: Gazi University, Faculty of Arts and Sciences, Biochemical Processing and Biomaterial Research Laboratory, 06500 Teknikokullar, Ankara, Turkey. g_bayramoglu@hotmail.com
authors.forename: Gülay
authors.initials: G
authors.lastname: Bayramoğlu
authors.forename: Ayşegül U
authors.initials: AU
authors.lastname: Metin
authors.forename: Begum
authors.initials: B
authors.lastname: Altintas
authors.forename: M Yakup
authors.initials: MY
authors.lastname: Arica
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000814:Aniline Compounds / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D004553:Electric Conductivity; D004789:Enzyme Activation; D004795:Enzyme Stability; D004800:Enzymes, Immobilized / Q000737:chemistry; D005949:Glucose Oxidase / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial
chemical_list: D000180:Acrylic Resins; D000814:Aniline Compounds; D001672:Biocompatible Materials; D004800:Enzymes, Immobilized; D008567:Membranes, Artificial; C416807:polyaniline; C010504:polyacrylonitrile; D005949:Glucose Oxidase