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    • 65. 发明授权
    • Method and apparatus for determining bacterial sensitivity
    • 用于确定细菌敏感性的方法和装置
    • US4416995A
    • 1983-11-22
    • US300943
    • 1981-09-10
    • Leonard Amaral
    • Leonard Amaral
    • C12M1/34C12Q1/18C12M1/12C12Q1/16
    • C12Q1/18Y10S435/803
    • Method, apparatus and automated system for determining the effects of a chemical agent upon a bacterial sample. Aliquots of a bacterial suspension in a culture medium, the chemical agent, and tritiated thymidine are deposited in polyethylene tubes having first and second compartments separated by a fixed millipore filter. A precipitation agent, such as trichloroacetic acid, is deposited into the polyethylene tubes to precipitate the bacteria. The bacteria is separated from the liquid by operation of a vacuum system which draws the liquid through the filter, thereby filtering out the bacteria. The filtered bacteria is subsequently washed with a washing solution. In one embodiment, a scintillation fluid is added to the bacteria, the bacteria then being conveyed to a scintillation counter which produces an output signal corresponding to the amount of radiation emanating from the bacteria. The amount of emanating radiation corresponds to the amount of tritiated thymidine which is incorporated into the bacteria, and hence is a measure of the rate of synthesis of DNA. In this manner, bacterial activity in the presence of a chemical agent is determined prior to a change in the bacterial population.
    • 用于确定化学试剂对细菌样品的影响的方法,装置和自动化系统。 在培养基,化学试剂和氚标记胸苷中的细菌悬浮液的等分试样沉积在具有由固定的微孔过滤器分离的第一和第二隔室的聚乙烯管中。 沉淀剂如三氯乙酸沉积在聚乙烯管中以使细菌沉淀。 通过操作真空系统将细菌从液体中分离出来,该真空系统将液体通过过滤器,从而过滤细菌。 随后用洗涤溶液洗涤过滤的细菌。 在一个实施方案中,向细菌中加入闪烁液,然后将细菌输送到闪烁计数器,其产生对应于从细菌发出的辐射量的输出信号。 发射辐射的量对应于掺入细菌中的氚标记的胸苷的量,因此是DNA合成速率的量度。 以这种方式,在细菌群体的变化之前测定在化学试剂存在下的细菌活性。
    • 66. 发明授权
    • Method and apparatus for characterizing biologically active agents
    • 用于表征生物活性剂的方法和装置
    • US3997404A
    • 1976-12-14
    • US581277
    • 1975-05-27
    • John R. Waters
    • John R. Waters
    • C12M1/34C12Q1/16G01N21/76C12K1/04
    • C12Q1/16C12M41/34C12M41/36G01N21/76Y10S435/808
    • A method for characterization of biological activity comprising providing a plurality of gas-tight cells each having a light-permeable wall section, each cell containing a different .sup.14 C-labeled fermentable substrate, a carbon dioxide absorber and a scintillation compound in intimate proximity to each other remote from said substrate, and an axenic sample of a biologically active material; subjecting said cells to conditions conducive to biological activity and thereafter measuring the light emitted by the scintillation compound as a result of the decay of .sup.14 CO.sub.2 generated by the metabolic action of the biologically active agent in said sample on said substrate and captured by the carbon dioxide absorber. Apparatus is provided comprising a plurality of sterile chambers containing different .sup.14 C-labeled fermentable substrates, means to facilitate introduction of an axenic sample of a biologically active agent into each chamber, means for sealing each chamber to form a gas-tight cell having a light-permeable wall section, and a carbon dioxide absorber and a scintillation compound in intimate proximity to each other in each cell adjacent the light-permeable wall section.
    • 一种用于表征生物活性的方法,包括提供多个具有透光壁部分的气密细胞,每个细胞含有不同的14C标记的可发酵底物,二氧化碳吸收剂和闪烁化合物彼此紧邻 远离所述衬底,以及生物活性材料的无色样品; 对所述细胞进行有利于生物活性的条件,然后测量由闪烁化合物发射的光,其是由所述样品中所述生物活性剂在所述底物上的代谢作用产生的14CO 2的衰变并由二氧化碳吸收剂 。 提供了包括多个含有不同14C标记的可发酵底物的无菌室的装置,有助于将生物活性剂的无菌样品引入每个室中的装置,用于密封每个室以形成具有发光基底的气密细胞的装置, 可渗透壁部分,以及邻近透光壁部分的每个细胞中彼此紧密相邻的二氧化碳吸收剂和闪烁体。