Today both academic and commercial interests in marine actinobacteria are growing. As they live in a unique environment that promotes the synthesis of new biologically active metabolites. The aim of the work is isolation, primary identification and study of morphological, cultural, physiological and biochemical properties of actinobacteria, separate from mussels (Mytilus galloprovincialis) of the Odessa Bay of the Black Sea. Methods. Samples of mussels collected in the coastal zone of Odessa Bay were used as material for the isolation of actinobacteria. Isolation of actinobacteria and the study of their morphological, cultural, physiological and biochemical properties was carried out by traditional microbiological methods. The fatty acid composition was determined on an Agilent 7890 semi-ionization gas chromatograph (Agilent Technologies, USA) to identify test strains using the Sherlock Microbial Identification System library. Results. From samples of mussels collected in 2020 in the area of the Hydrobiological Station of Odessa National I.I. Mechnikov University were isolated 14 strains of actinobacteria. They were identified by fatty acid analysis to Streptomyces genus. Strains of Streptomyces sp. Myt2, Myt6 and Myt7ch synthesized melanoid pigments. Strains of actinobacteria are well absorbed by most of the studied sources of carbon, except strains of Streptomyces sp. Myt12a, Myt12b. Almost half of the strains have oxidase activity and coagulate milk. Conclusions. As a result of microbiological studies for the first time were characterized morphological, cultural and physiological and biochemical properties and determined taxonomic composition by fatty acid spectra for actinobacteria isolated from the mussels of the Odessa Bay of the Black Sea.

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Aim. Determination of fatty acid composition of actinobacteria isolated from the surfaces of biological growth of the Odesa gulf of the Black Sea, and their identification. Methods. The 31 isolated strains of actinobacteria were grown in TSB at 28 ° C and 150 rpm for 72 hours. Fatty acid methyl esters of the studied strains were determined according to the MIS Operating Manual on a gas chromatograph Agilent 7890, identification was performed using the identification system of microorganisms MIDI Sherlock. Results. Using chromatographic analysis of fatty acids, it was found that of the 27 studied strains of actinobacteria were identified to the genus Streptomyces, and the 4 strains - to the genus Nocardiopsis. It was found that the fatty acid profiles of the studied actinobacteria of the genus Nocardiopsis were dominated by fatty acids: 15:0 ANTEISO, 16:0 ISO, 17:0 ANTEISO, 18:1 CIS 9, and the fatty acid profiles of bacteria of the genus Streptomyces - 14:0 ISO, 15:0 ANTEISO, 16:0 ISO, 17:0 ANTEISO. Conclusions. Actinobacteria the surfaces of biological growth of the Odesa gulf of the Black Sea belong to the genera Streptomyces and Nocardiopsis, and their fatty acid profiles are characterized by the dominance of isomers of branched saturated fatty acids.

Loss prevention and food quality maintenance are primarily associated with protection against the negativeimpact of microorganisms and their metabolites during manufacture and storage. In this regard, in recent years, the issue of thegoods safety is of the top- priority in the food production. Meat and meat products are the most labour-intensive and expensiveto manufacture. Their main components (protein, fat, etc.) are a favourable environment for development of a variety of microorganisms.This paper presents the results of the biotechnological property research of the Lactobacillus genus collection strains,their effect on the microorganisms directly isolated from meat and on the collection strains (saprophytic, conditionally pathogenicand pathogenic microorganisms). In particular, the antagonistic activity regarding the indicator and collection microorganisms,acid activity and ability to survive at high salt concentrations and low above-zero temperatures have been studied.Based on the experimental results, the most active strains for further study and use in the me