[The use of thermal analysis in developing chemical tests of sterilization].

A number of chemicals have been examined to find out whether they can be employed to test the temperature regimens of vapor and hot-air sterilization methods. Test kits for various temperature ranges and different sterilization modes have been selected. It is advisable that stains be used in tests (except the sulfur one) to control vapor (but not hot-air) sterilization.

[Bactericidal action of formalin on the causative agent of plague].

Ten per cent neutral formalin in a ratio 1 : 20 was demonstrated to be useful as a desinfecting and fixing substance in pathohistological examinations of organs and tissues animals infected with the causative agent of plague. With test-objects' volume of 1.0 cm3 the optimal period of exposure providing a permanent bactericidal effect is 24 hours, with volumes of 1.