[Formation of an antibiotic of the siomycin group by a Streptomyces corchorusii 1401 culture].

Streptomycete 1401 inhibiting the growth of gram-positive organisms was isolated from a soil sample in the screening of new antibiotics. By its cultural and morphological properties the culture was classified as Str. corchorusii.

[Formation of antibiotic 2562 by a culture of the actinomycete, Streptomyces griseovariabilis].

An actinomycetous culture 2562 inhibiting the growth of gramnegative bacteria was isolated from a soil sample. The culture was classified as Streptomyces griseovariabilis. It was found that culture 2562 produced an antibiotic belonging to the group of novobiocin.

[New species of the genus Nocardia and its antibiotic properties].

A culture of a new species of Nocardia, i.e. N.

[Formation of a new antibiotic, nocamycin, by a culture of Nocardiopsis syringae sp. nov].

A culture of a new actinomycetous species, Nocardiopsis syrinage was isolated from a soil sample. The antibiotic produced by it was named nocamycin. It accumulated in the culture fluid on cultivation of the organism in a nutrient medium containing soybean meal, glycerin, sodium chloride and calcium carbonate.

[Lincomycin formation by strain R-367 on a complex medium not containing corn steep].

A new complex medium for biosynthesis of lincomycin by strain R-367 was developed using one-factor experiments and mathematical schemes of planning. A complex of mineral salts containing nitrogen, sulphur, phosphurus, magnesium and trace elements was introduced into the content of the new medium. This provided elimination of corn steep liquor from the medium.