Abstract
Poly-γ-methyl- l-glutamate (PMG) was modified and used for enzyme immobilization. Trichloroethyl ester (TCE) and three kinds of amino groups (ethylenediamine, ED; 1,8-diamino-4-amino-methyloctane, TA; polyethyleneimine, PEI) were introduced into the pendant group of PMG. A membrane was prepared from these polymers for enzyme immobilization. Urease was immobilized on each membrane using glutaraldehyde or water-soluble carbodiimide. Urease was very stable when it was immobilized with water-soluble carbodiimide on the membrane having PEI in the pendant group. The characteristics of immobilized urease were also discussed.
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