The role of sudden variance shifts in predicting volatility in bioenergy crop markets under structural breaks

The article describes the species belonging to the Fabaceae family and the ephemeral species belonging to the ecological groups found in the flora of the Fergana Valley, their distribution, coordinates, centers of origin, flowering, fruiting, and a comparative analysis of the species. According to the literature analysis, there are 2526 species belonging to 97 families in the Fergana Valley, of which 64% are endemic species of the Fabaceae family, and as a result of field research conducted in 2019-2023, it was found that there are 17 species of ephemerals belonging to 5 genius in the Fergana Valley.

Distribution of ephemeral species of Fabaceae family in the flora of Fergana Valley of the Republic of Uzbekistan

Kadirova

2024

Study of chemical composition and antioxidant activity of magnolia plant seed

Tukhtaboeva,

Khoshimjonova,

Tuychieva

et al. 2024

In the article, some physiological and biochemical properties of the seeds, leaves, and inflorescences of Magnolia soulangeana, Magnolia grandiflora, and Magnolia stellate, introduced in Uzbekistan, were studied. In particular, the amount of macro- and micronutrients in the generative organs was determined and analyzed. The amount of heavy metals and toxic substances such as Cd, Sb, Ng, Va, As in Magnolia soulangeana and Magnolia Grandiflora plants was also determined. Antioxidant activity of plant species gultoji leaves was also studied. When comparing the indicators of studied species Magnolia soulangeana, Magnolia Grandiflora and Magnolia stellate, it was observed that antioxidant activity is relatively low in Magnolia Grandiflora species.

Influence of drop on the ultrastructure lipid composition of liver hepatocytes of pregnant rats

Tuychieva,

Mirkhamidova,

Alimova

et al. 2024

The influence of a toxic agent on the structure of the liver is inevitable. Of interest are the effects of pesticides on intrauterine formation and their teratogenic and embryotoxic properties. The influence of teratogens may manifest itself at different levels of organization of a living organism, and some aspects of cell metabolism change. Using advanced electron microscopy techniques combined with modern knowledge of membranology and toxicology, we conducted a detailed study of morphological changes in the subcellular architecture of the liver after repeated dropplet exposure. Ultrastructural studies were carried out on pregnant rats and their embryos on the 3rd, 13th, 19th days of pregnancy and embryonic development. Poisoning of animals with the pesticide dropp causes clear degenerative processes in the cellular and subcellular structures of the liver.