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    METHOD FOR MEASURING DEGREE OF CRYSTALLIZATION OF DRUG PREPARATION
    21.
    发明专利
    METHOD FOR MEASURING DEGREE OF CRYSTALLIZATION OF DRUG PREPARATION 失效

    公开(公告)号：JPH04127057A

    公开(公告)日：1992-04-28

    申请号：JP24976890

    申请日：1990-09-18

    Applicant: MIZUGAKI MICHINAO

    Inventor： MIZUGAKI MICHINAO ,  SATO HIDEAKI

    IPC: G01N33/15 ,  A61K9/14 ,  A61K31/545 ,  C07D201/18

    Abstract: PURPOSE:To simply measure the degree of crystallization of a drug preparation of every kind, especially, a beta-lactam compound with high accuracy by measuring the intensity of extremely weak chemiluminescence of the drug preparation. CONSTITUTION:It is said that there is predetermined relation between the value of extremely weak chemiluminescence CL of a predetermined compound, especially, a beta-lactam compound and the degree of crystallization thereof when temp. is constant. Then, in order to measure the degree of crystallization of a drug preparation, especially, the beta-lactam compound, a first, the CL value of a compound whose degree of crystallization is known is measured, for example, by a chemiluminescence measuring apparatus amplifying the receiving quantity of the light from a compound within a predetermined time to be capable of measuring, displaying and recording the same as a photoelectron pulse to prepare a calibration curve wherein a degree of crystallization is set to a horizontal axis and luminous intensity is set to a vertical axis. When the luminous intensity of a compound whose degree of crystallization is unknown is measured, the degree of crystallization thereof can be easily calculated and the stability thereof can be evaluated.

    Stabilized epsilon caprolactam composition and method for preparing same
    23.
    发明授权
    Stabilized epsilon caprolactam composition and method for preparing same 失效
    稳定的ε己内酰胺组合物及其制备方法

    公开(公告)号：US3954738A

    公开(公告)日：1976-05-04

    申请号：US430690

    申请日：1974-01-04

    Applicant: Jean W. Bouchoux ,  William A. Larkin

    Inventor： Jean W. Bouchoux ,  William A. Larkin

    IPC: C07D201/18 ,  C08G69/18 ,  C08K5/57 ,  C07D223/10

    CPC classification number: C08K5/57 ,  C07D201/18 ,  C08G69/18

    Abstract: Hexaorgano distannanes of the general formula R.sub.3 Sn-SnR.sub.3 significantly reduce or eliminate the discoloration which occurs when mixtures containing an alkali metal salt of a lactam are stored under an inert atmosphere for extended periods of time at temperatures between ambient and 100.degree.C. R in the foregoing formula represents a monovalent hydrocarbon radical containing between 1 and 20 carbon atoms.

    Abstract translation: 通式为R 3 Sn-SnR 3的六碳偶氮二苯胺显着降低或消除了当含有内酰胺的碱金属盐的混合物在惰性气氛下在环境温度和100℃之间的温度下长时间储存​​时发生的变色。 上述式表示含有1至20个碳原子的单价烃基。

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