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    Production of maltose with amylases produced by streptomyces
    3.
    发明授权
    Production of maltose with amylases produced by streptomyces 失效
    用链霉菌生产具有淀粉酶的麦芽糖

    公开(公告)号：US3868464A

    公开(公告)日：1975-02-25

    申请号：US38275273

    申请日：1973-07-26

    申请人： MEIJI SEIKA KAISHA

    发明人： KOAZE YOSHIHISA ,  NAKAJIMA YUTAKA ,  HIDAKA HIDEMASA ,  NIWA TOMIZO ,  ADACHI TAKASHI ,  YOSHIDA KENJI ,  ITO JIRO ,  NIIDA TARO ,  SHOMURA TAKASHI ,  UEDA MASAHIRO

    IPC分类号： C12N9/28 ,  C12P19/12 ,  C12P19/14 ,  C13K1/06 ,  C13K7/00

    CPC分类号： C13K1/06 ,  C12N9/2417 ,  C12P19/12 ,  C12P19/14 ,  C13K7/00 ,  Y10S435/887 ,  Y10S435/889 ,  Y10S435/898

    摘要： This invention relates to a process of producing a new amylase by cultivating a strain of the particular seven species of Streptomyces; Streptomyces albus, Streptomyces aureofaciens, Streptomyces hygroscopicus, Streptomyces hygroscopicus var. angustomyceticus, Streptomyces viridochromogenes, Streptomyces flavus and Streptomyces tosaensis. These new amylases produced by the above particular species, respectively have some enzymatic activities and characteristics which are much more useful and advantageous in producing a higher yield of maltose from starch and amylose, as compared to the use of the known amylases. The starch hydrolyzate which is obtained by reacting the new amylase with starch in aqueous dispersion contains a predominant proportion of maltose and is useful as a natural sweetening material. Further, this starch hydrolyzate mainly composed of maltose is converted into a mixture of sugar alcohols mainly composed of maltitol by hydrogenating in the presence of a nickel catalyst.

    摘要翻译： 本发明涉及通过培养特定七种链霉菌的菌株来生产新的淀粉酶的方法; 链霉菌（Streptomyces albus），链霉菌（Streptomyces aureafaciens），吸水链霉菌（Streptomyces hygroscopicus），吸水链霉菌变种链霉菌（Streptomyces hygroscopicus var。 香菇，链霉菌（Streptomyces viridochromogenes），黄曲霉（Streptomyces flavus）和链霉菌（Streptomyces tosaensis）。 这些由上述特定物质产生的这些新的淀粉酶分别具有一些酶活性和特性，与使用已知的淀粉酶相比，在淀粉和直链淀粉产生更高产量的麦芽糖方面更有用和有利。 通过使新的淀粉酶与水分散体中的淀粉反应获得的淀粉水解物含有主要比例的麦芽糖，并且可用作天然甜味剂。 此外，主要由麦芽糖组成的淀粉水解物通过在镍催化剂的存在下氢化而转化为主要由麦芽糖醇组成的糖醇的混合物。

    Process for the production of 7-chloro-5**a 11**a-dehydrotetracycline
    4.
    发明授权
    Process for the production of 7-chloro-5**a 11**a-dehydrotetracycline 失效
    生产7-CHLORO-5 ** A 11 ** A-去氧胆酸的方法

    公开(公告)号：US3616241A

    公开(公告)日：1971-10-26

    申请号：US3616241D

    申请日：1967-02-15

    申请人： AMERICAN CYANAMID CO

    发明人： GROWICH JOHN ANDREW JR

    IPC分类号： C12P29/00 ,  C12D9/00

    CPC分类号： C12P29/00 ,  Y10S435/889

    摘要： This disclosure describes a process of producing 7-chloro-5a, 11a-dehydrotetracycline which comprises cultivating, under submerged aerobic conditions, strains of Streptomyces aureofaciens which are not riboflavin-deficient and are nonresponsive to Cosynthetic Factor-1, and which produce 7chloro-5a,11a-dehydrotetracycline to the exclusion of tetracycline and 7-chlorotetracycline.