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12 条记录 (耗时 0.019 秒)

    Process for preparing L-rhamnose
    2.
    发明授权
    Process for preparing L-rhamnose 失效
    制备L-RHAMNOSE的方法

    公开(公告)号：US5077206A

    公开(公告)日：1991-12-31

    申请号：US273782

    申请日：1988-11-21

    申请人： Peter S. J. Cheetham ,  Michael A. Quail

    发明人： Peter S. J. Cheetham ,  Michael A. Quail

    IPC分类号： C07H3/08 ,  C12P19/02 ,  C12P19/14

    CPC分类号： C12P19/02 ,  Y10S435/853 ,  Y10S435/873 ,  Y10S435/922 ,  Y10S435/942

    摘要： The invention provides a process for preparing L-rhamnose by hydrolyzing a rhamnosidic bond of a glycoside having rhamnose in a terminal position, by enzymatically hydrolyzing the glucoside with an enzyme combination comprising biological structural material degrading enzyme and a naringinase preparation which has a higher rhamnosidase activity than beta-glucosidase activity. Preferably the enzyme combination having rhamnosidase activity together with additional enzyme activity is a selected partially purified enzyme preparation having high rhamnosidase activity and low glucosidase activity together with biological structural material degrading activity. More preferably the additional enzyme activity is derived from an enzyme of the group consisting of protease, lipase, pectinase, cellulase and hemicellulase.

    Process for the preparation of fructosyl disaccharides
    8.
    发明授权
    Process for the preparation of fructosyl disaccharides 失效
    制备果糖二糖的方法

    公开(公告)号：US4617269A

    公开(公告)日：1986-10-14

    申请号：US622853

    申请日：1984-06-21

    申请人： Elner B. Rathbone ,  Andrew J. Hacking ,  Peter S. J. Cheetham

    发明人： Elner B. Rathbone ,  Andrew J. Hacking ,  Peter S. J. Cheetham

    IPC分类号： C07H5/02 ,  C12N9/10 ,  C12P19/12 ,  C12P19/18 ,  C12R1/125

    CPC分类号： C07H5/02 ,  C12N9/1051 ,  C12P19/12 ,  C12P19/18 ,  Y10S435/839

    摘要： A process for preparing a fructoside, especially a fructosyl disaccharide, comprises reacting a fructosyl saccharide such as sucrose or raffinose with an alcohol or aldose in the presence of a fructosyl-transferase, especially one derived from B. subtilis NCIB 11811, 11872 or 11873. In particular, aldose is a compound of the formula ##STR1## in which A represents a hydrogen atom or the group CH.sub.2 X, where X represents a hydrogen atom or an alkoxy group, and the fructosyl disaccharide so formed is halogenated to provide a halosucrose or halogalactosucrose sweetener.

    摘要翻译： 制备果糖苷，特别是果糖基二糖的方法包括在果糖基转移酶，特别是来自枯草芽孢杆菌NCIB 11811,11872或11873的一种存在下，使果糖基糖例如蔗糖或棉子糖与醇或醛糖反应。 特别地，醛糖是式（II）的化合物，其中A表示氢原子或CH2X基团，其中X表示氢原子或烷氧基，并且如此形成的果糖基二糖被卤化以提供 卤糖或卤糖乳糖甜味剂。

    Allomelanin production
    10.
    发明授权
    Allomelanin production 有权
    异青霉素生产

    公开(公告)号：US06303106B1

    公开(公告)日：2001-10-16

    申请号：US09077912

    申请日：1998-09-25

    申请人： Nigel E. Banister ,  Peter S. J. Cheetham

    发明人： Nigel E. Banister ,  Peter S. J. Cheetham

    IPC分类号： A61K7135

    CPC分类号： A61K8/66 ,  A61K8/72 ,  A61Q5/10 ,  A61Q19/04 ,  C09B69/104 ,  C12P17/00 ,  Y10S514/944

    摘要： A method of producing a melanin comprises oxidizing a phenolic compound at one or more hydroxyl groups thereof, wherein the phenolic compound is selected from 5-hydroxyindole and derivatives thereof and compounds of formula (1) and the oxidation is provided by biotransformation in the presence of an oxidoreductase enzyme, the compound of formula (1), wherein R1 is H or OH; R2 is H, OH orOCH3; R3 is H or OH at least one of R1 and R3 being OH; R4 is selected from H , R, —COOX and R7—COOX, wherein R is an optionally substituted saturated or unsaturated alkyl group having from 1 to 12 carbon atoms, R7 is an optionally substituted saturated or unsaturated alkylene group having from 1 to 12 carbon atoms and X is selected from H and aliphatic and aromatic ester forming groups; and R5 and R6 is each independently selected from H, OH, NH2, OCH3, CH3, SH, NHCO2, NHCH3, COOH and saturated or unsaturated alkyl groups having up to 8 carbon atoms.

    摘要翻译： 一种生产黑色素的方法包括在其一个或多个羟基处氧化酚类化合物，其中酚类化合物选自5-羟基吲哚及其衍生物和式（1）化合物，氧化通过生物转化在存在 氧化还原酶，式（1）化合物，其中R 1是H或OH; R2是H，OH或OCH3; R 3为H或OH，R 1和R 3中的至少一个为OH; R4选自H，R，-COOX和R7-COOX，其中R是具有1至12个碳原子的任选取代的饱和或不饱和烷基，R7是具有1至12个碳原子的任选取代的饱和或不饱和亚烷基 原子，X选自H和脂族和芳族酯形成基团; 并且R 5和R 6各自独立地选自H，OH，NH 2，OCH 3，CH 3，SH，NHCO 2，NHCH 3，COOH和具有至多8个碳原子的饱和或不饱和烷基。