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    • 7. 发明授权
    • Process for preparing 2-keto-L-gulonic acid
    • 制备2-酮-L-古洛糖酸的方法
    • US3998697A
    • 1976-12-21
    • US569852
    • 1975-04-21
    • Takayasu SonoyamaHiroyoshi TaniBunji KageyamaKobee KobayashiTahiko HonjoShigeo Yagi
    • Takayasu SonoyamaHiroyoshi TaniBunji KageyamaKobee KobayashiTahiko HonjoShigeo Yagi
    • C07H7/027C12P7/42C12P7/58C12P7/60C12D1/06
    • C07H7/027C12P7/58C12P7/60Y10S435/823Y10S435/84Y10S435/843
    • 2-Keto-L-gulonic acid is prepared directly from D-glucose by microbial conversion utilizing mixed culturing on or mixed contacting with a medium containing D-glucose, employing at least two kind of microorganisms; 2,5-diketo-D-gluconic acid producing strains which belong to the genera of Acetobacter, Acetomonas and Gluconobacter and strains capable of converting the 2,5-diketo-D-gluconic acid into 2-keto-L-gulonic acid which belong to the general of Brevibacterium and Corynebacterium. Both the incubation of the microorganisms in a medium containing D-glucose and the direct contact of any products obtained from the cells of the microorganisms with the substrate may be used in the disclosed process. By-production of the undesired optical isomer, 2-keto-D-gluconic acid, of the intended product is effectively prevented by employing the mixed culturing or contacting because of the presence of the 2,5-diketo-D-gluconic acid producing strain or any products thereof in the medium during at least part of the entire process.
    • 通过使用至少两种微生物的混合培养或与含有D-葡萄糖的培养基混合接触,通过微生物转化直接由D-葡萄糖制备2-酮-L-古洛糖酸; 属于醋杆菌属,醋酸杆菌属和葡萄糖酸杆菌属的2,5-二酮-D-葡萄糖酸生产菌株和能够将2,5-二酮-D-葡萄糖酸转化成2-酮-L-古洛糖酸的菌株,其属于 到短杆菌属和棒杆菌属的一般。 在所公开的方法中可以使用在含有D-葡萄糖的培养基中培养微生物和从微生物细胞获得的任何产物与底物的直接接触。 由于存在2,5-二酮-D-葡糖酸生产菌株,通过使用混合培养或接触有效地防止了所需产物的不需要的光学异构体2-酮-D-葡萄糖酸的副产物 或其整个过程的至少部分期间在介质中的任何产物。
    • 10. 发明授权
    • Process for preparing 2-keto-L-gulonic acid
    • 制备2-酮-L-古洛糖酸的方法
    • US4696897A
    • 1987-09-29
    • US747393
    • 1985-06-21
    • Takayasu SonoyamaShigeo YagiBunji Kageyama
    • Takayasu SonoyamaShigeo YagiBunji Kageyama
    • C12P7/58C12P7/60C12P39/00C12R1/13C12R1/15C12R1/18
    • C12P39/00C12P7/58C12P7/60
    • 2-Keto-L-gulonic acid is prepared directly from D-glucose by microbial conversion utilizing mixed culturing on a medium containing D-glucose, employing two kinds of microorganisms; the first, a 2,5-diketo-D-gluconic acid producing microorganism which belongs to genus Erwinia and the second, a 2-keto-L-gulonic acid producing microorganism which belongs to genus Brevibacterium or Corynebacterium. The incubation of the microorganisms in a medium containing D-glucose is used in the disclosed process. By-production of 2-keto-D-gluconic acid, the undesired isomer of the intended product is effectively prevented by employing mixed culturing because of the co-existence of both microorganisms in the medium during at least part of the entire cultivation. Namely, 2-keto-D-gluconic acid produced by the second microorganism is utilized by the first microorganism to produce 2,5-diketo-D-gluconic acid which is subsequently converted into 2-keto-L-gulonic acid by the second microorganism.
    • 通过使用两种微生物在含有D-葡萄糖的培养基上进行混合培养,通过微生物转化从D-葡萄糖直接制备2-酮-L-古洛糖酸; 第一个属于欧文氏菌属的2,5-二酮-D-葡萄糖酸生产微生物,其次是属于短杆菌属或棒状杆菌属的2-酮-L-古洛糖酸生产微生物。 在所公开的方法中使用微生物在含有D-葡萄糖的培养基中培养。 由于2-酮-D-葡萄糖酸的副产物,因为在整个培养的至少一部分期间由于培养基中的两种微生物的共存,因此通过采用混合培养来有效地防止了所需产物的不需要的异构体。 也就是说,由第二微生物产生的2-酮-D-葡萄糖酸被第一微生物利用以产生2,5-二酮-D-葡萄糖酸,随后由第二微生物转化成2-酮-L-古洛糖酸 。