[Economic coefficients during batch and multicyclic cultivation of Clostridium perfringens type A]. / Izuchenie ékonomicheskikh koéffitsientov v protsesse periodicheskogo i mnogotsiklicheskogo kul'tivirovaniia Clostridium perfringens tipa A.

The analysis of the accomplished processes of cultivation of C. perfringens, type A, has shown that at all cycles of the multicyclic process and during large-scale submerged cultivation in reactors the culture of this micro-organism remains in a physiologically active state. This is confirmed by high values of economic coefficients and by the consumption of keto acids.

[Pathology and physiology of microbes. IV. Economic and metabolic coefficients in assessing the functional states of Salmonella typhi]. / Patologiia i fiziologiia mikrobov. Soobshchenie IV. Ekonomicheskii i metabolicheskii koéffitsienty v otsenke funktsional'nykh sostoianii Salmonella typhi.

The study of economic and metabolic coefficients under different conditions of batch and continuous cultivation with the use of S. typhi, a facultative anaerobe, as a model has demonstrated that the functional state of the microbial population is determined by the phase of the development of the culture, the composition of the culture medium, the conditions of aeration and stirring, the concentration of the energy-providing substrate and the dilution rate in continuous cultivation. The economic coefficient with respect to the energy-providing substrate has been found to be the main characteristic of the functional state of the population: the high values of this characteristic correspond to the physiological state of the population. The decrease of the economic coefficient below a certain critical value is indicative of the pathological state of the population.