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    • 1. 发明授权
    • Immobilized enzyme membrane
    • 固定酶膜
    • US4307195A
    • 1981-12-22
    • US80026
    • 1979-09-28
    • Yoshiharu KarasawaHisashi Kohkame
    • Yoshiharu KarasawaHisashi Kohkame
    • C12N11/08B01D57/00B01D69/02B32B5/18C12M1/34C12N11/00C12N11/02C12N11/04C12N11/12C12Q1/00G01N27/333G01N27/40C12M1/40
    • B01D69/144C12N11/02C12Q1/002G01N27/3271
    • An immobilized enzyme membrane for use at the working face of an electrochemical electrode is prepared which comprises an asymmetrical membrane integrally formed from a skin layer substantially incapable of permeating an enzyme therethrough but capable of permeating a gas and a liquid, and a sponge layer having pores containing an enzyme immobilized therein by crosslinking and which pores intercommunicate with one another throughout the sponge layer and provide sufficient porosity for retaining a necessary amount of the enzyme. The immobilized enzyme membrane contains a large amount of enzyme, has good diffusion and permeability, and has stabilized enzyme activity for a prolonged period of time. Additionally, there is obtained a quick response time and good analytical precision when the immobilized enzyme membrane is used at the working face of an electrode of electrochemical measuring instruments.
    • 制备用于电化学电极工作面的固定化酶膜,其包括由基本上不能透过酶穿透其中但能渗透气体和液体的皮肤层整体形成的不对称膜,以及具有孔隙的海绵层 含有通过交联固定在其中的酶,并且这些孔在整个海绵层中彼此相通,并提供足够的孔隙以保持必需量的酶。 固定化酶膜含有大量的酶,具有良好的扩散和渗透性,并且在长时间内具有稳定的酶活性。 另外,当在电化学测量仪器的电极的工作面上使用固定化酶膜时,获得了快速的响应时间和良好的分析精度。