Порівняльна характеристика подільського та карпатського фенотипів Helleborus purpurascens Waldst. et Kit. (Ranunculaceae Juss.) в умовах культури

The results of cultivation of Helleborus purpurascens Waldst. et Kit. of Podyllian and Carpathian origin have been analyzed with the purpose to determine differences in the terms of passing through phenological phases of seasonal development.Проаналізовано результати культивування рослин Helleborus purpurascens Waldst. et Kit. подільського та карпатського походження з метою виявлення відмінностей між ними у термінах проходження фенологічних фаз та сезонного розвитку

Türkiye-Russia cooperation determines the course of developments in Eurasia

From Russia's strategic alliance perspective, driven by a healthy pragmatism, Türkiye can always be seen as a reliable partner. Today, the two most important actors determining the course of economic and political events in Eurasia are Russia and Türkiye. These two countries have achieved political and economic stability in the Black Sea, so the view that Russia and Türkiye need to form a geopolitical alliance is very popular. Today, the conditions for further strengthening Turkish-Russian cooperation are developing. In addition, regarding the fight against international terrorism, joint counter-terrorism exercises of the Russian and Turkish Special Operations Forces should be held

Exact solution of Dirac equation for axially channeled relativistic electrons

The exact analytical solution of the Dirac equation for axial channeled electrons, with taking into account the spin direction of the channeled electron is found. It is shown that the longitudinal polarization manifests itself as the splitting of every energy level into two sublevels

Impact of petroleum products on soil composition and physical-chemical properties

The article describes the grain-size distribution, physical and mechanical properties, swelling and specific electrical resistivity of soils before and after the contact with petroleum products. The changes in mechanical properties of soils contaminated with petroleum products have been stated. It leads to the increase in compressibility values, decline in internal friction angle and cohesion