Patents Assigned to University of Virginia and National Aeronautics & Space Administration
  • Microbial detection and enumeration method and apparatus
    Patent number: 4246343
    Abstract: The presence of microorganisms in a sample is determined by culturing micrganisms in a growth medium which is in contact with a measuring electrode and a reference electrode and detecting the change in potential between the electrodes which arises by the migration and accumulation of said microorganisms adjacent the surface of the measuring electrodes thus forming a charge-charge interaction between said measuring electrode and accumulated microorganisms, by measuring the potential change with a high impedance potentiometer.
    Type: Grant
    Filed: May 2, 1979
    Date of Patent: January 20, 1981
    Assignee: University of Virginia and National Aeronautics & Space Administration
    Inventors: Judd R. Wilkins, Glenn E. Stoner