Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving viable micro-organism
Patent
1991-03-19
1993-02-16
Warden, Robert J.
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving viable micro-organism
435291, 435296, 435287, 435808, C12Q 104, C12M 124, C12M 134
Patent
active
051870720
ABSTRACT:
A method and apparatus for testing for the presence of selected microorganisms can be used in the field or in the laboratory. A sample to be tested is mixed with a culture medium for promoting growth of the selected microorganisms. A test device of a semi-permeable material is inverted in the culture medium, and the test device is held to a vertical position. The microorganisms create a biofilm within the test device, and the test device subsequently retains gas generated by the microorganisms. The gas lowers the density of the test device, causing the test device to float. The floating is taken as an indication of the presence of the selected microorganisms; and, by measuring the time required for the test device to float, the size of the population of the selected microorganisms can be determined.
REFERENCES:
patent: 2476093 (1949-07-01), Hirsch
patent: 3171793 (1965-03-01), Searcy et al.
patent: 3474003 (1969-10-01), Hirsch
patent: 3825476 (1974-07-01), Hirsch
patent: 4868110 (1989-09-01), Des Rosier et al.
patent: 4906566 (1990-03-01), Cullimon et al.
Abiola Abimbola T.
Alford George W.
Cullimore D. Roy
Naqvi Karim
Reihl Jeff
Middleton James B.
Trembley T. A.
Warden Robert J.
LandOfFree
Method and apparatus for the determination of fermentative analy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for the determination of fermentative analy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the determination of fermentative analy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2147681