[Ultrastructural changes in Mycobacterium rubrum cells exposed to sulfochloranthine].

The object of this work was to study the effect of sulfochlorantine (SCA), a new disinfecting compound containing chlorine, on Mycobacterium rubrum cells. The sensitivity of the cells to this agent was studied as well as their ultrastructure at the doses 0.01, 0.

[Action of sulfochlorantine on cell-free systems of Escherichia coli].

Sulfochlorantine containing active chlorine was shown to produce a general toxic action inactivating a number of Escherichia coli enzyme systems involved in protein biosynthesis. DNA synthesis catalysed by calf thymus DNA polymerase alpha was repressed by 50% and the synthesis of aminoacyl-tRNA catalysed by aminoacyl-tRNA synthetases was repressed by 70% in the cell-free systems at the lethal concentration of the bactericide (0.01% and higher).

[Effect of sulfochloranthine on protein and nucleic acid biosynthesis in Escherichia coli].

Sulfochloranthine was shown to be bacteriostatic for Escherichia coli B cells grown in a chemically defined medium at a concentration of 0.002%, sublethal at a concentration of 0.005%, and lethal at 0.

[Use of malt extract as a nitrogen source for continuous cultivation of Candida utilis].

The effect of an aqueous extract from malt sprouts on the growth and development of fodder yeast was investigated during their continuous cultivation. The extract can be used as a nitrogen source during continuous cultivation of fodder yeast. It is supposed that the extract contains compounds capable to inhibit yeast growth.