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- W2037547357 abstract "Urease was covalently immobilized on glutaraldehyde-pretreated chitosan membranes. The optimum immobilization conditions were determined with respect to glutaraldehyde pretreatment of membranes and to reaction of glutaraldehyde-pretreated membranes with urease. The immobilized enzyme retained 94% of its original activity. The properties of free and immobilized urease were compared. The Michaelis constant was about five times higher for immobilized urease than for the free enzyme, while the maximum reaction rate was lower for the immobilized enzyme. The stability of urease at low pH values was improved by immobilization; temperature stability was also improved. The optimum temperature was determined to be 65 degrees C for the free urease and 75 degrees C for the immobilized form. The immobilized enzyme had good storage and operational stability and good reusability, properties that offer potential for practical application." @default.
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- W2037547357 date "2007-04-24" @default.
- W2037547357 modified "2023-09-27" @default.
- W2037547357 title "Urease immobilized on chitosan membrane: Preparation and properties" @default.
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- W2037547357 doi "https://doi.org/10.1002/jctb.280480309" @default.
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