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dc.contributor.authorGürdas S.
dc.contributor.authorGüleç H.A.
dc.contributor.authorMutlu M.
dc.date.accessioned2019-07-27T12:10:23Z
dc.date.accessioned2019-07-28T09:15:14Z
dc.date.available2019-07-27T12:10:23Z
dc.date.available2019-07-28T09:15:14Z
dc.date.issued2011
dc.identifier.issn0970-7077
dc.identifier.urihttps://hdl.handle.net/20.500.12418/5056
dc.description.abstractThis study aimed to determine adsorption characteristics of Aspergillus oryzae ?-galactosidase onto a basic resin Duolite A568. The experimental data were analyzed by the Langmuir and Freundlich isotherm to describe the adsorption equilibrium. The equilibrium data fitted well with the Langmuir model which confirmed that the Duolite A568 was favourable for adsorption of ?-galactosidase enzyme under conditions studied. The maximum adsorption capacity was found to be (5.1 ± 0.49) × 10-2 mg/g at 35 °C. The kinetic data were fitted to pseudo-second-order kinetic model of Ho by linear and non-linear regression methods. The enthalpy change (?H°), the entropy change (?S°) and the Gibb's free energy change (?G°) for the sorption processes were calculated to be 15.5 kJ/mol, 30.4 J/mol K and -9.4 kJ/mol, respectively. The positive ?H° value indicated that the adsorption process was endothermic. ?G° and ?S° values showed that adsorption process occurred by physical mechanism and spontaneously.en_US
dc.description.sponsorshipGürdas, S.; Department of Food Engineering, Faculty of Engineering, Cumhuriyet University, 58140 Sivas, Turkey; email: sgurdas@hacettepe.edu.tren_US
dc.language.isoengen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subject?-Galactosidaseen_US
dc.subjectActivation energyen_US
dc.subjectAdsorption kineticen_US
dc.subjectDuolite A568en_US
dc.subjectFreundlich and Langmuir isothermsen_US
dc.titleAdsorption isotherm and kinetic modelling of ?-galactosidase immobilization onto a basic resin (Duolite A568)en_US
dc.typearticleen_US
dc.relation.journalAsian Journal of Chemistryen_US
dc.contributor.departmentGürdas, S., Department of Food Engineering, Faculty of Engineering, Cumhuriyet University, 58140 Sivas, Turkey, Plasma Aided Bioengineering and Biotechnology Research Group, Faculty of Engineering, Hacettepe University, 06800 Ankara, Turkey -- Güleç, H.A., Department of Food Engineering, Faculty of Engineering and Architecture, Trakya University, 22180 Edirne, Turkey, Plasma Aided Bioengineering and Biotechnology Research Group, Faculty of Engineering, Hacettepe University, 06800 Ankara, Turkey -- Mutlu, M., Plasma Aided Bioengineering and Biotechnology Research Group, Faculty of Engineering, Hacettepe University, 06800 Ankara, Turkeyen_US
dc.identifier.volume23en_US
dc.identifier.issue3en_US
dc.identifier.endpage1054en_US
dc.identifier.startpage1049en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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