Immobilization of enzymes on particulate porous carriers for use in organic mediums
    1.
    发明授权
    Immobilization of enzymes on particulate porous carriers for use in organic mediums 有权
    在用于有机介质的颗粒状多孔载体上固定酶

    公开(公告)号:US06582942B1

    公开(公告)日:2003-06-24

    申请号:US09649942

    申请日:2000-08-29

    IPC分类号: C12P764

    CPC分类号: C12N11/08 C12N11/00 C12N11/14

    摘要: An immobilized enzyme is prepared for use in organic mediums essentially devoid of free water. An enzyme-containing liquid medium is contacted with a particulate porous carrier which preferably has a particle size of 200-1000 &mgr;m and a surface area of 20-1000 m2/g to adsorb the enzyme on the carrier, and volatile components of the liquid medium contained by the carrier are removed. The carrier may have a hydrophilic surface, and an amount of liquid medium is used to prevent agglomeration of the carrier. Alternatively, the carrier has a hydrophobic surface, and the addition of a hygroscopic substance suppresses agglomeration of the carrier by absorbing excess liquid. The hygroscopic substance may be removed during the removal of volatile components. Contacting of the enzyme-containing liquid and carrier can be in a fluidized bed where immobilization and removing volatile components are conducted simultaneously, or contacting can be in mixer followed by removing volatile components in a fluidized bed. The enzyme-containing liquid may be atomized onto the carrier in the fluidized bed or in the mixer. Enzymes immobilized include lipase, and the immobilized lipase can be used in trans-esterification reactions.

    摘要翻译: 制备用于基本上不含游离水的有机介质中的固定化酶。 将含酶的液体培养基与粒径为200-1000μm,表面积为20-1000m 2 / g的颗粒状多孔质载体接触以将酶吸附在载体上,并且液体介质的挥发性成分 由载体包含的被移除。 载体可以具有亲水表面,并且使用一定量的液体介质来防止载体的聚集。 或者,载体具有疏水性表面,并且加入吸湿性物质通过吸收多余的液体来抑制载体的聚集。 在去除挥发性组分期间可以除去吸湿物质。 含酶液体和载体的接触可以在流化床中,其中同时进行固定和除去挥发性组分,或者可以在混合器中接触,然后在流化床中除去挥发性组分。 含酶液体可以在流化床或混合器中雾化到载体上。 固定的酶包括脂肪酶,并且固定的脂肪酶可以用于酯交换反应。

    Aryl/alkyl vinyl sulfone hyaluronic acid derivatives
    2.
    发明授权
    Aryl/alkyl vinyl sulfone hyaluronic acid derivatives 失效
    芳基/烷基乙烯基砜透明质酸衍生物

    公开(公告)号:US08071757B2

    公开(公告)日:2011-12-06

    申请号:US12161717

    申请日:2007-03-02

    IPC分类号: A61K31/728 C08B37/00

    摘要: A hyaluronic acid derivative, and methods of producing and using said derivative, the derivative comprising n repeating units and having the general structural formula (I), wherein, in at least one repeating unit, one or more of R1, R2, R3, R4 comprises an etherbound aryl/alkyl sulfone having the general structural formula (II), wherein R comprises an alkyl- or aryl-group, and otherwise R1, R2, R3, R4 are hydroxyl groups, OH.

    摘要翻译: 透明质酸衍生物,以及所述衍生物的制造和使用方法,所述衍生物包含n个重复单元并具有通式结构式(I),其中在至少一个重复单元中,R 1,R 2,R 3,R 4中的一个或多个 包括具有通式结构式(II)的醚键芳基/烷基砜,其中R包括烷基 - 或芳基,并且否则R 1,R 2,R 3,R 4是羟基,OH。