Detection of Helicobacter pylori
    1.
    发明授权
    Detection of Helicobacter pylori 有权
    检测幽门螺杆菌

    公开(公告)号:US06509169B2

    公开(公告)日:2003-01-21

    申请号:US09903902

    申请日:2001-07-12

    IPC分类号: C12Q104

    摘要: A method for detecting Helicobacter pylori in a subject's gastroenteral tract involves measuring a change in resistance of an electronic or electrochemical sensor, notably a polypyrrole film, on exposure to gas from the subject's lungs and/or stomach. Depending on the magnitude of the change (if any) a positive or negative result is indicated visually by electronics means. Two sensors are used, one of which receives a sample of gas which has passed through an amonia-absorbing means to provide a corrected baseline value for the ammonia. The invention also provides apparatus suitable for carrying out the method.

    摘要翻译: 用于检测受试者胃肠道中的幽门螺杆菌的方法包括在暴露于来自受试者的肺和/或胃的气体时测量电子或电化学传感器,特别是聚吡咯膜的电阻变化。 根据变化的大小(如果有的话),电子手段可以直观地指出正或负的结果。 使用两个传感器,其中一个接收已经通过氨基酸吸收装置的气体样品,以提供校正的氨的基准值。 本发明还提供适用于实施该方法的设备。

    Preparation of conductive films
    2.
    发明授权
    Preparation of conductive films 失效
    导电膜的制备

    公开(公告)号:US5089294A

    公开(公告)日:1992-02-18

    申请号:US557749

    申请日:1990-07-26

    CPC分类号: G01N27/126

    摘要: An electrically-conductive polypyrrole film is formed, on a non-conducting substrate, by contacting the substrate with pyrrole and an oxidising agent in a solvent, or with the colloidal polypyrrole that is the reaction product thereof, and removing the substrate while the film is at least substantially transparent, e.g. 50 to 250 nm thick. A gas sensor comprises a chemiresistor prepared by this process.