[Biologically active substances of preparation avercom].

The preparation avercom created on the basis of ethanol extracts from the biomass of Streptomyces avermitilis UCM Ac-2179, contains an antiparasitic antibiotic avermectin, as well as a complex of biologically active substances: amino acids, lipids, including nonsaturated fatty acids, and phytohormones, particularly: auxins, cytokinins, hybberellins. The above mentioned complex is characterized by nematocidical, phytostimulating and elicitor effect upon plants which has been confirmed with the results of production experiments on the cucumber variety Angelina.

[Streptomyces species identification using the computer program StmID].

Systematic position of 49 cultures from Ukrainian Collection of Microorganisms (UCM) has been revised using the computer program StmID. Forty five cultures retained their species status but 4 cultures received the new species. Authors make a critical estimate of the program work and propose some recommendations for users.

[Prospects for storing streptomycetes in atmospheres of various gases].

The possibility of Streptomyces cultures preservation in the atmosphere of argon, nitrogen, carbon dioxide and free air (the latter as a control) has been first studied. The possibility of short-term (4-6 months) preservation of Streptomyces cultures in the atmosphere of argon and nitrogen has been demonstrated. Some cultures could be preserved in the argon and nitrogen atmosphere for 26 years.