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    • 12. 发明申请
    • Use of Cloud Point System in Biotransformation
    • 使用云点系统进行生物转化
    • US20070259428A1
    • 2007-11-08
    • US10567439
    • 2004-07-05
    • Daijie ChenZhilong WangMei GeYiping JinWeidong Ye
    • Daijie ChenZhilong WangMei GeYiping JinWeidong Ye
    • C12N15/87
    • C12P33/02C12N1/38
    • The invention relates to the field of microbial technology. It discloses a method to apply the cloud point system (CPS) in biotransformation by selecting one or more types of nonionic surfactant to form a aqueous system with a cloud point below the microbial transformation temperature, which serves as transformation medium. The method disclosed is suitable in particular for microbial transformation of hydrophobic compounds, for the system where substrate or product inhibits microbial growth or where product is further degraded by microbes. The CPS in the present invention forms a microemulsion of water-in-oil and oil-in-water, where the drops of surfactant is able to solubilize, serving as substrate reservoir and product extractant. This enhances bioavailability of substrates and elimination of product inhibition. The large water vesicles existing in the continuous surfactant phase provide aqueous environment to the cells where they can be sheltered from detrimental effects of surfactants, resulting in improvement of biocompatibililty.
    • 本发明涉及微生物技术领域。 它公开了一种通过选择一种或多种类型的非离子表面活性剂来应用浊点系统(CPS)进行生物转化的方法,以形成低于微生物转化温度的浊点的水系,其作为转化介质。 所公开的方法特别适用于疏水化合物的微生物转化,其中底物或产物抑制微生物生长或其中产物被微生物进一步降解的系统。 本发明中的CPS形成了油包水和水包油的微乳液,其中表面活性剂的液滴能够溶解,作为底物贮存器和产物萃取剂。 这增强了底物的生物利用度和消除了产物的抑制作用。 存在于连续表面活性剂相中的大水泡为细胞提供水环境,在那里可以避免表面活性剂的不利影响,导致生物相容性的提高。