Биология

The object of the study was sprouts of spring soft wheat Triticum aestivum L. Cultivation was carried out in a climatic chamber at a temperature of 18 ± 1° C. As a control, plants grown during the photoperiod day / night 16/8 were used. Some features of the growth and development of Triticum aestivum L. plants were revealed under etiolation conditions. It was established that differences in the length of the root system of etiolated and control seedlings are determined by the length of the roots of the upper tier.

The composition and spatial distribution of the surface & litterdwelling mesofauna in leaved forests the indigenous terrace of the Irtysh river are analyzed on the basis materials of accounting for invertebrates by soil traps. The surveys were carried out in 2005–2010 in three types of forests – aspen forest, lime forest and birch forest, located within Tobolsk district of the Tyumen region (southern taiga, Western Siberia).

The collections were realized out in June – September 2018 using the original light trap within the city of Krasnodar. The article contains lists of 74 species (1252 specimens) of Coleopteran from 15 families: Carabidae – 13 species, Hydrophilidae – 12, Dytiscidae – 6, Elateridae – 6, Curculionidae – 4, Coccinellidae – 3, Heteroceridae – 2, Tenebrionidae – 2, Chrysomelidae – 2, Spercheidae, Scirtidae, Cantharidae, Bostrichidae, Anthicidae and Cerambycidae – in 1 species.

Consideration of the generic spectrum of flora is one of the elements of a general analysis of the flora of the study area. It allows to identify individual traits to a greater extent than the analysis of the family spectrum. The study of phytodiversity at the level of floras will allow in the future to clarify the patterns of their territorial location. Samara-Ulyanovsk Volga region is the territory within two administrative regions (Samara and Ulyanovsk) belongs to the Middle Volga region. It is very diverse in natural conditions.

The greatest diagnostic significance for tularemia is played by antibodies against lipopolysaccharide (LPS). Previously, it has been shown that specific antibodies that appear in the blood serum of laboratory animals infected with virulent strains and people who have recovered from tularemia can bind both to LPS Francisella tularensis and to LPS Francisella novicida, while after the vaccination specific antibodies to LPS F. novicida are absent.

The fruits of midland hawthorn (Cratae gusoxyacantha L.), as well as leaves and flowers have a complex composition. A water-soluble polysaccharide complex, flavonoids and saponins, and other biologically active compounds were revealed in them. Consequently, preparations made from the vegetable material of hawthorn have a high biological activity. A liquid extract of fruits and a tincture of hawthorn flowers, are widely used in medicine. These drugs are used for cardiovascular diseases, have a sedative and hypotensive effect.

Regeneration of plants in vitro through direct organogenesis allows the avoidance of somaclonal variation. The aim of our study was the induction of direct organogenesis in the culture of mature embryo in maize lines created at Saratov State University: ATTM (bm, wx, y), ATTM (bm, y), ATTM (bm, g, V-type CMS), AT-3 (4n). These lines are characterized by genetic predisposition to parthenogenesis. The mature embryos isolated from sterile grains were used as a primary explant.

The article presents the results of a study of the vitality structure of four Delphinium litwinowii Sambuk coenopopulations from the Penza, Tambov and Voronezh regions in the period from 2017 to 2018. The most northern coenopopulation from Penza region in 2017 showed the strongest vitality, while the weakest was the Voronezh’ coenopopula- tion, located to the south, near the village of Vladimirovka.

Biological testing of (thio) semicarbazones 2,4-diarylbicyclo [3.3.1] non2-en-9-ones, differing in the nature of aryl substituents and nucleophile, was carried out.The object of the study was seedlings of spring soft wheat Triticum aestivum L. of the Saratovskaya 36 variety. To assess the physiological activity of the tested compounds, we used a valuable analysis of the morphometric parameters of growth of the root system and shoots of the test and control plants and the quantitative content of chlorophyll a, chlorophyll b, and carotenoids in the first leaf.

The development of methods of drug delivery to the brain is one of the priorities of the therapy of most cerebral diseases. There are more than 70 technologies to overcome the blood-brain barrier (BBB), but many of them are not widely used in daily clinical practice, as they lead to negative consequences. Here we propose a new method of overcoming the BBB using loud sound (110 dB, 370 Hz, duration – 2 hours).