Polyaniline grafted polyacylonitrile conductive composite fibers for reversible immobilization of enzymes: Stability and catalytic properties of invertase

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dc.contributor.authorBayramoğlu, Gülay
dc.contributor.authorKarakışla, Meral
dc.contributor.authorAltıntaş, Begüm
dc.contributor.authorMetin, Ayşegül Ülkü
dc.contributor.authorSaçak, Mehmet
dc.contributor.authorArıca, M. Yakup
dc.date.accessioned2020-06-25T17:48:20Z
dc.date.available2020-06-25T17:48:20Z
dc.date.issued2009
dc.departmentKırıkkale Üniversitesi
dc.description.abstractPolyacylonitrile fibers (PAN) surfaces were modified with chemical polymerization of conductive polyaniline (PANI) in the presence of potassium dichromate as an oxidizing agent. The effect of aniline concentration on the grafting efficiency and on the electrical surface resistance of PAN/PANI composite fibers was investigated. The surface resistance of the conductive composite fibers in this work was found to be between 8.0 and 0.5 k Omega/cm. As the amount of grafted PANI increased on the PAN fibers the electrical resistance of composite fibers decreased. The PAN/PANI composite fibers were characterized by SEM and FTIR studies. Composite PAN/PANI fibers were used for reversible immobilization of invertase. The immobilization efficiency and the activity of the immobilized invertase (from 1.0 mg/mL invertase solution at pH 5.5) were increased with increasing PANI contents of the composite fibers. The maximum amount of immobilized enzyme onto composite fibers containing 2.0% PANI was about 76.6 mg/g. The optimum pH for the free enzyme was observed at 5.0. On the other hand, immobilized invertase yielded a broad optimum PH profile between pH 5.0 and 7.0. Immobilized invertase exhibited 83% of its original activity even after two months storage at 4 degrees C while the free enzyme showed only 7% of its initial activity. (C) 2009 Elsevier Ltd. All rights reserved.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.procbio.2009.04.011
dc.identifier.endpage885en_US
dc.identifier.issn1359-5113
dc.identifier.issn1873-3298
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-66049100989
dc.identifier.scopusqualityQ1
dc.identifier.startpage880en_US
dc.identifier.urihttps://doi.org/10.1016/j.procbio.2009.04.011
dc.identifier.urihttps://hdl.handle.net/20.500.12587/4411
dc.identifier.volume44en_US
dc.identifier.wosWOS:000267619700014
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofProcess Biochemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectConductive polymeren_US
dc.subjectComposite fibersen_US
dc.subjectPolyanilineen_US
dc.subjectAdsorptionen_US
dc.subjectEnzyme immobilizationen_US
dc.subjectInvertaseen_US
dc.titlePolyaniline grafted polyacylonitrile conductive composite fibers for reversible immobilization of enzymes: Stability and catalytic properties of invertaseen_US
dc.typeArticle

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