Assay systems using more than one enzyme
    2.
    发明公开
    Assay systems using more than one enzyme 失效
    使用超过一个酶的测定系统

    公开(公告)号:EP0125867A3

    公开(公告)日:1987-01-07

    申请号:EP84303085

    申请日:1984-05-08

    IPC分类号: C12Q01/00 C12Q01/32 C12Q01/54

    摘要: This specification discloses methods of detection or measurement of an enzyme or of its specific substrate, and sensors used in such methods. The present invention is con- cenred with a multi-enzyme system, and the specification discloses, as one aspect of the invention a method of assay in which an electrode poised at a suitable potential is contacted with a system comprising a first enzyme, a cofactor linked with said enzyme and a mediator compound which transfers charge to the electrode from the first enzyme when its electrical state is changed by reaction of cofactor material. The cofactor may be NAD, NADP (both collectively referred to herein as NAD (P) CAMP ATP GTP TTP CTP. The specification particularly illustrates a method of assay in which an electrode (1) poised at a suitable potential is contact with a system comprising a first enzyme El a nicotinamide adenine dinucleotide compound N linked with said enzyme EI and a mediator compound F which transfers charge to the electrode from the first enzyme when its electrical state is changed by a NAD(P) NAD(P)H reaction. The NAD compound may act as a "bridge" between the said enryme// mediator system and further NAD utilizing enzymes E2.

    Testing material for detecting alcohols
    6.
    发明公开
    Testing material for detecting alcohols 失效
    用于检测酒精的试验材料

    公开(公告)号:EP0154409A3

    公开(公告)日:1988-03-02

    申请号:EP85300748

    申请日:1985-02-05

    申请人: UNITIKA LTD.

    IPC分类号: C12Q01/32

    CPC分类号: C12N9/0006 C12Q1/32

    摘要: A testing material for detecting alcohols is described, comprising (a) NAD or NADP, (b) alcohol dehydrogenase, (c) (1) thermophilic microorganism-derived diaphorase, or (2) diaphorase and dextran, (d) a dye and (e) a carrier. This testing material has very good storage stability and can measure alcohol concentrations, in particular ethanol concentrations in saliva, enzymatically with ease. It is useful in detecting and preventing driving while under the influence of liquor.

    Method for determination of ammonia
    7.
    发明公开
    Method for determination of ammonia 失效
    用于确定氨基酸的方法

    公开(公告)号:EP0135092A3

    公开(公告)日:1987-04-22

    申请号:EP84109133

    申请日:1984-08-01

    IPC分类号: C12Q01/58 C12N09/06 C12Q01/32

    CPC分类号: C12Q1/26 C12Q1/32

    摘要: The quantity of ammonia in a sample to be measured for ammonia content can be determined by:
    (A) contacting the sample with L-glutamate dehydrogenase in the presence of reduced nicotinamide-adenine dinucleotide or reduced nicotinamide-adenine dinucleotide phosphate and a-ketoglutarate to produce glutamate in a quantity corresponding to the ammonia content in the sample; (B) catalyzing the resultant mixture by L-glutamate oxidase in the presence of oxygen to produce hydrogen peroxide in a quantity corresponding to the glutamate content in the resultant mixture; (C) measuring the quantity of hydrogen peroxide produced or the production rate thereof; and (D) calculating the ammonia content from the quantity of hydrogen peroxide produced or the production rate thereof thus measured. In accordance with the method of the present invention described above, it has become possible to determine the quantity of ammonia with high sensitivity in a short period of time by using as a signal a measurable value associated with hydrogen peroxide via a continuous autoanalyzing system.

    Isolation and quantitation of alkaline phosphatase
    10.
    发明公开
    Isolation and quantitation of alkaline phosphatase 失效
    碱性磷酸酶的分离和定量

    公开(公告)号:EP0166505A3

    公开(公告)日:1988-09-21

    申请号:EP85302252

    申请日:1985-04-01

    申请人: AKZO N.V.

    IPC分类号: C12Q01/42 C12Q01/32 C12N09/16

    CPC分类号: C12Q1/42 C12N9/16 C12Q2326/92

    摘要: There is disclosed a process for isolating and quantitating an alkaline phosphatase comprising the steps of:
    (1) separating the phosphatase from other enzymes in a biological sample; (2) reacting the phosphatase from step (1) with a co-enzyme precursor to produce a co-enzyme; (3) employing the co-enzyme produced in step (2) in a series of chemical reactions at least one of which uses a chromophore generation catalyst, to yield a chromophore, and (4) measuring the absorbance of the chromophore which is generated in step (3).

    摘要翻译: 公开了一种分离和定量碱性磷酸酶的方法,包括以下步骤:(1)将生物样品中的磷酸酶与其他酶分离; (2)使来自步骤(1)的磷酸酶与辅酶前体反应以产生辅酶; (3)使用步骤(2)中产生的辅酶进行一系列化学反应,其中至少一种使用发色团产生催化剂产生发色团,和(4)测量生色团中产生的发色团的吸光度 步骤(3)。