Composition comprenant un moût de xanthane et des protéines et application de la composition dans un fluide de forage de puits
    71.
    发明公开
    Composition comprenant un moût de xanthane et des protéines et application de la composition dans un fluide de forage de puits 失效
    Xanthanbrüheund Proteine enthaltende Zusammensetzung und ihr Verfahren in einerBohrflüssigkeit。

    公开(公告)号:EP0611824A1

    公开(公告)日:1994-08-24

    申请号:EP94400247.6

    申请日:1994-02-04

    IPC分类号: C12P19/06 C09K7/02

    CPC分类号: C12P19/06 C09K8/08 C12N1/20

    摘要: On décrit une composition d'un moût de xanthane préparée à partir d'un milieu de culture renfermant en particulier au moins une source de soufre de concentration comptée en élément soufre au plus égale à 60 mg par litre de milieu de culture et d'au moins une souche du genre Xanthomonas , et d'une source de protéines dans un rapport pondéral protéines sur xanthane compris entre 0,05 et 2. Le moût récupéré contenant de préférence les cellules, à pH alcalin et en présence de cations bivalents, avec les protéines, constitue une composition qui manifeste des propriétés de thixotropie.
    Application de la composition dans un fluide de forage pour le forage des puits.

    摘要翻译: 由含有特别是至少一种浓度的硫源的培养基制备的黄原胶的组合物,其计为元素硫,最多等于每升培养基60mg,至少一种 来自黄原乳杆菌,蛋白质与黄原胶的重量比在0.05和2之间的蛋白质来源。优选地,在碱性pH下和在二价阳离子存在下,蛋白质含有细胞的回收肉汤构成了表现出 触变性。 组合物在钻井液中的应用。

    Fermentation feedstock
    72.
    发明公开
    Fermentation feedstock 失效
    发酵-Ausgangsmaterial。

    公开(公告)号:EP0609995A1

    公开(公告)日:1994-08-10

    申请号:EP94300357.4

    申请日:1994-01-19

    IPC分类号: C12P19/04 C12P19/06

    CPC分类号: C12P19/04 C12P19/06

    摘要: A fermentation process for the production of a product comprising mannose units eg. xanthan gum in which a simple sugar is a component of the fermentation feedstock and a part of that sugar is mannose. Preferably the sugar is a mixture of mannose and glucose optionally containing minor amounts of other sugars, the mixture of mannose and glucose suitably being produced by the epimerisation of glucose.

    摘要翻译: 用于生产包含甘露糖单元的产品的发酵方法,例如 黄原胶,其中单糖是发酵原料的组分,并且该糖的一部分是甘露糖。 优选地,糖是甘露糖和葡萄糖的混合物,任选地含有少量的其它糖,甘露糖和葡萄糖的混合物适当地通过葡萄糖的差向异构化产生。

    Genetic control of acetylation and pyruvylation of xanthan gum
    75.
    发明公开
    Genetic control of acetylation and pyruvylation of xanthan gum 失效
    XANTHAN GUM的乙酰化和吡啶的遗传控制

    公开(公告)号:EP0410326A3

    公开(公告)日:1992-04-15

    申请号:EP90113985.7

    申请日:1990-07-20

    IPC分类号: C12P19/06 C08B37/00

    CPC分类号: C08B37/0033 C12P19/06

    摘要: Compositions are provided which include a water-soluble polysaccharide polymer having a D-glucose:D-mannose:D-glucuronic acid ratio of about 2:2:1. The D-glucose moieties are linked in a beta-[1,4] configuration. The inner D-mannose moieties are linked in an alpha-[1,3] configuration, generally to alternate glucose moieties. The D-glucuronic acid moieties are linked in a beta-[1,2] configuration to the inner mannose moieties. The outer mannose moieties are linked to the glucuronic acid moieties in a beta-[1,4] configuration. Processes for preparing the polysaccharide polymers are also provided.

    Method and reactor vessel for the fermentative preparation ofpolysaccharides, in particular xanthane
    79.
    发明公开
    Method and reactor vessel for the fermentative preparation ofpolysaccharides, in particular xanthane 失效
    用于特定半胱氨酸发酵制剂的方法和反应器

    公开(公告)号:EP0249288A3

    公开(公告)日:1988-11-02

    申请号:EP87201074

    申请日:1987-06-05

    IPC分类号: C12P19/06 C12M01/20

    摘要: For the fermentative preparation of polysac­charides, in particular xanthane, water, production medium (sugars, nutrient salts), and an inoculation material of a suitable aerobic bacterium are mixed in a reactor as reaction components, the production medium being exposed to fermentation while an oxygen-containing gas is being supplied. The object is to avoid the usual low yield of such a process and to reject an expensive and sensitive alternative construction (circulation tube). According to the invention, the reaction components are introduced into a reactor vessel in a circulating flow by means of pumping means, which circulating flow comprises a rising flow and a descending flow which are separated from each other by one or more partitions disposed in the reactor vessel. The mixing is brought about because the rising flow and/or the descending flow is passed essentially in the form of a plug flow through one or more static in-line mixers.

    Preparation of xanthan gum
    80.
    发明公开
    Preparation of xanthan gum 失效
    Herstellung von Xanthan-Gummi。

    公开(公告)号:EP0287363A2

    公开(公告)日:1988-10-19

    申请号:EP88303352.4

    申请日:1988-04-14

    IPC分类号: C12P19/06 C12N15/52

    CPC分类号: C12P19/06 C12N15/52

    摘要: A method of increasing xanthan gum production, comprising culturing a Xanthomonas campestris strain having a xanthan-increasing modification in a culture medium, wherein the modification is selected from the group consisting of (1) a mutation causing rifampicin­resistance; (2) a mutation causing bacitracin-resis­tance; or (3) exogenous genetic information controlling the synthesis of xanthan; and separating xanthan from the culture medium, is provided along with specific DNA sequences and Xanthomonas campestris strains showing increased xanthan gum production.

    摘要翻译: 一种增加黄原胶生产的方法,其包括在培养基中培养具有增加黄原胶的改性的黄单胞菌属(Salantonas campestris)菌株,其中所述修饰选自:(1)引起利福平抗性的突变; (2)引起杆菌肽抗性的突变; 或(3)控制黄原胶合成的外源遗传信息; 并从培养基中分离黄原胶与特异性DNA序列和野油菜黄单胞菌(Xanthomonas campestris)菌株一起提供,显示出增加的黄原胶生产。