[Comparison of the antimicrobial properties of catamin AB and rockal and their action on bacterial membrane systems].

The antimicrobial properties of two cationic detergents, i.e. rockal, an antiseptic made in England and catamine AB, its analog made in the USSR were compared.

[Possible mechanisms of the rifampicin suppression of the conjugation transfer of R-factors in Escherichia coli].

The studies on the effect of a number of antibiotics on transfer of R-factors with the use of a kinetic conjugation system showed that rifampicin inhibited the transfer of various R-factors independent of the microbial host strain and R-factor type (the inhibition coefficient of I infinity equals 7.5-16.8).

[Caffeine as an inhibitor of the conjugation transfer of R-factors. A study of the quantitative effect of caffeine on the conjugation transfer of R-factors].

The effect of caffeine on the conjugation transfer of R-factors was studied using a standartized kinetic conjugation system described earlier. It was shown that caffeine had a pronounced inhibitory effect on R-factor transfer. The inhibition coefficients at a caffeine concentration of 2000 gamma/ml were from 2.