[Destabilization of emulsions during extraction of antibiotics from natural solutions]. / Destabilizatsiia émul'sii pri ékstraktsionnom izvlechenii antibiotikov iz nativnykh rastvorov..

Various means for changing the aggregative stability of emulsions in the system of benzylpenicillin fermentation broth filtrate and butyl acetate were tested. It was shown that the use of desemulgators was more efficient than the use of some means for removing the desemulgating admixtures. Moreover, addition of surface active substances after the preliminary thermocoagulation resulted in maximum decreasing of the emulsion aggregative stability.

[Comparative evaluation of stability of benzylpenicillin in acid media of natural solutions and in culture fluid]. / Sravnitel'naia otsenka ustoichivosti benzilpenitsillina v kislykh sredakh v nativnom rastvore i kul'tural'noi zhidkosti.

Inactivation of benzylpenicillin in real media i.e. fermentation broths and their filtrates was studied in comparison with the published data on inactivation of commercial benzylpenicillin in aqueous solutions as dependent on the medium pH and temperature. The lowest constant of benzylpenicillin inactivation was shown to be in the fermentation broths.