Detection of bacterial activity
US4160205A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1977 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Oct 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/48735
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Bacterial activity is detected by inoculating the bacteria into a suitable nutrient medium and monitoring the resistive component of the electrical impedance of this culture in such a manner that the value obtained is influenced by the temperature coefficient of the resistive component to a degree which is equivalent to a change in temperature of not more than .+-.0.01 K. Either the temperature of the culture is maintained constant to .+-.0.01 K and the resistive component is sensed directly, or the resistive component of the culture is compared with the resistive component of a reference volume of the nutrient medium, the temperatures of the culture and the reference volume being maintained constant to .+-.1.0 K and their difference in temperature being held to .+-.0.01 K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.