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See the retraction notice BIO Web of Conferences 138, 00001 (2024), https://doi.org/10.1051/bioconf/202413800001

Biologically active substances, essential oils, and plant extracts were studied obtained from new high-yield varieties of Origanum vulgare L. (Raduga, Belaya Ptitsa, Krymchanka) and Origanum tyttanthum Contsch. (Alcina) of the GSBSI “NBG – NSC RAS” breeding. It was found that the O. vulgare variety Belaya Ptitsa was distinguished by the content of essential oil, the main component of which was carvacrol. The maximum total content of phenolic substances and flavonoids was distinguished by an alcoholic extract from the O. tyttanthum variety. Neochlorogenic and rosemary acids, apigenin-6,8-di-C-glucoside, carvacrol, and thymol were identified in extracts of all the studied marjoram varieties. It is shown that the vegetable raw material O. vulgare cv “Belaya Ptica” is promising for the production of essential oil with a high content of carvacrol, and O. tyttanthum cv “ can serve as a raw source of rosemary acid.

The results of studying the antimicrobial activity of an essential oil obtained by steam distillation from dry raw materials of lemon monarda (Monarda citriodora Cerv. ex Lag.), grown in the conditions of the Steppe Crimea (Prisivashye). The major components of the studied essential oil are thymol (61.52%), p-cimene (7.55%), carvacrol (6.54%), γ-terpin (5.56%). The high antimicrobial activity of the essential oil against reference cultures and clinical isolates of Gram-positive and Gram-negative microorganisms has been established, which indicates the prospects of its use as a potential antibacterial drug of natural origin.