[Preparation of fed-batch culture of Nocardioides sp].

A screening for carbon sources revealed ethanol to be the best substrate for condensed Nocardioides sp. culture. A strategy achieving the maximum (21 g/l) yield of biomass was developed for the control over the condensed fed-batch culture production.

[Biosynthesis of somatotropin in a recombinant strain of Escherichia coli].

A recombinant Escherichia coli K-12 strain was grown in the regime of chemostat with glucose limitation at a different flow rate and in the regime of turbidostat. The stability of its population and the dynamics of somatotropin biosynthesis were studied. The plasmid-containing strain became less stable as the flow rate in the fermenter dropped down, which was due, apparently, to a greater limitation.

[Microbiological transformation of carbohydrates. Glucose isomerization into fructose by washed cells of Streptomyces sp. strain 29].

Glucose-fructose transformation by washed and packed cells of Streptomyces sp. 29 was studied. The cells grown on the nutrient medium containing xylose and Co and Mg salts were capable to perform glucose-fructose isomerization.