Biology

Polysaccharidebased Biological Activity of Extracts Isolated from Fruits of Crataegus Monogyna of Varying Degrees of Maturity

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.

Effect of the O-Antigen Chemical Structure in Different Subspecies of Francisella Tularensis on Immunological Reactions

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 aim of this work was to investigate the effect of the structure of the O-antigen of lipopolysaccharide F.

Generic Spectrum in the Analysis of Flora in Samara-Ulyanovsk Volga Region

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 Beetles (Insecta: Coleoptera), Collected by the Light Traps with Super Bright LEDs on the Territory of Krasnodar

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.

Taxonomic Composition of Ground Invertebrates and Their Ratio in Different Types of Deciduous Forests within Tobolsk District of Tyumen Region

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). As a result, 281 species of invertebrates were identified in forests, about 50% of which were in the families Carabidae, Staphylinidae and Linyphiidae.

Some Features of Growth of Etiolated Plants in the Aspect of Implementation of Donor-Acceptor Relations

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.

Influence of Probiotic “Bifidumbacterin” on the State of Large Intestine Microbiocenosis, Activity of the Antioxidant System and Processes of Lipid Peroxidation in the Conditions of Gentamycin-Associated Dysbiosis and Anomalous Characteristics of the Magn

Disturbances in the composition of microbiocenoses are warnings of changes in the physiological status of the organism, associated with the inhibition of immunobiological protection of the organism, its allergization, chronic intoxication, and increased susceptibility to infectious diseases. Some studies confirm the effect of magnetic radiation on abnormal characteristics both on the viability and growth rate of bacteria, and on the activity of various systems, in particular the antioxidant system and the lipid peroxidation system.

Study of the Morphological Features of the Cells of the Bacteria Yersinia pestis, Grown at Different Temperatures by Atomic Force Microscopy

Atomic force microscopy in the study of bacterial cells allows the determination of such morphological parameters as: length, width, cell thickness, its perimeter, cross-sectional area, volume and root mean square roughness of the cell surface, which depends on the degree of laying of peptidoglycan and density of lipopolysaccharide. The aim of this work was to study the changes in the morphological parameters of the cell and the cell surface of bacteria when the temperature conditions of the culture medium change on the Y. pestis model.

Current Status of the Collection Fund of the Laboratory of Ornamental Plants of the Russian Academy of Sciences

The Collection Fund of the Laboratory of Ornamental Plants of the Main Botanical Garden named after N. V. Tsitsin of the Russian Academy of Sciences has currently 1055 species and varieties, as well as 4 995 varieties and garden forms. It was created on the basis of classical methods of introduction, such as (ecology)-geographical, phytocoenotic and the method of generic complexes. At the same time, the modern policy of forming the collection fund is aimed at creating not only large but also unique collections.

Modern Cadastre of Species of Tularemia Microbe Carriers Habitant in Tularemia Foci of Different Types, Situated in the Territory of Russia

The tularemia microbe can be found in all landscape zones of the Northern hemisphere, and in the Russian Federation this infection has been detected in virtually all regions. It spreads beyond the polar circle up to the 71° parallel. From 100 to 400 cases of tularemia infection are registered in the Russian Federation annually, 75% of which are accounted for the Northern, Central and Siberian territories of the country. From time to time epidemic morbidity rates are reported. Presently, six types of natural tularemia foci are established in Russia.

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