Kvasny Prum. 1977; 23(6): 127-128 | DOI: 10.18832/kp1977022

New instrument for the determination of resistance of microorganisms to higher temperatures.Peer-reviewed article

J. ŠAVEL, M. PROKOPOVÁ

The article deals with a new instrument which has been developed for the determination of resistance of microorganisms to higher temperatures. The principal part of the instrument is a metal block with a deep, narrow cavity of rectangular cross section. Microorganisms to be tested are dispersed in agar medium inclosed in a metal flat case which is inserted into the cavity of block. One end of the block is heated to a higher the other to a lower temperature. After heating the agar plate is put into culture medium to find, in what parts of it microorganisms survived.
Experience con firms advantages of the described instrument: linearity of temperature field , negligeable temperature fluctuation (0,1 °C in 3 hours), short time (less than 4 minutes) requred to obtain steady conditions, no danger of sample drying and no condensation of water.
(In Czech, English summary only)

Keywords: microorganisms, temperature, resistance, measuring

Published: June 1, 1977