Detection of bacterial activity

Details Detection of bacterial activity Detection of bacterial activity

1977-10-19

1979-07-03

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

23230B, 324 71R, 324 57R, 435 30, 435291, G01R 2702

Patent

active

041602056

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.

REFERENCES:
patent: 3952246 (1976-04-01), Sprott et al.
patent: 3984766 (1976-10-01), Thornton

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