Omsk State Pedagogical University
Omsk, Russia

Omsk State Pedagogical University is a university in Omsk, Russia. Wikipedia.

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Solomatin D.V.,Omsk State Pedagogical University
Prikladnaya Diskretnaya Matematika | Year: 2016

We study the concept of the planarity rank suggested by L. M. Martynov for semigroup varieties. Let V be a variety of semigroups. If there is a natural number r > 1 that all V -free semigroups of ranks 6 r allow planar Cayley graphs and the V -free semigroup of a rank r + 1 doesn't allow planar Cayley graph, then this number r is called the planarity rank for variety V . If such a number r doesn't exist, then we say that the variety V has the infinite planarity rank. We prove that a non-trivial variety of commutative semigroups either has the infinite planarity rank and coincides with the variety of semigroups with the zero multiplication or has a planarity rank 1, 2 or 3. These estimates of planarity ranks for varieties of commutative semigroups are achievable.

Efremov A.N.,Omsk State Pedagogical University
Inland Water Biology | Year: 2016

The results of studies on the structure of vegetative organs of Stratiotes aloides L. are presented. An organographic analysis and detailed morphological and anatomical descriptions of the root system, shoot system, and inflorescences have been made. It is demonstrated that the S. aloides shoot system is characterized by high vegetative mobility. The main histological topographical complexes, their proportions, and histochemical features are determined. The shoot system of S. aloides is characterized by underdeveloped xylem. Lignification of the epidermal and exodermal cell wall is a compensatory adaptation providing additional reinforcing properties. The development of diffuse collenchyma and general aerenchymatization of S. aloides tissues are effective mechanisms of adaptations to the aquatic habitat. © 2016, Pleiades Publishing, Ltd.

Kassal B.Y.,Omsk State Pedagogical University
Russian Journal of Biological Invasions | Year: 2016

As a result of reintroduction of individuals of the Eastern European and Belorussian subspecies of European beaver populations, a Middle Irtysh population was formed. Five stages can be distinguished in its development: adaptation (1953-1966); recovery (1967-1975); stabilization (1976-1988); depression (1989-2000); and expansion (2001-2012, not finished). Each stage has its own individual statistical and mathematical characteristics. A complete restoration of the European beaver range has not been achieved in the oblast, since the introduction of commercial hunting led to a depression in the number and number dilution of the range. Therefore, the quantitative and spatial development of the Middle Irtysh European beaver population was delayed for 25 years. © Pleiades Publishing, Ltd., 2016.

Antonova E.I.,Omsk State Pedagogical University
Contemporary Problems of Ecology | Year: 2010

An hour after hyperthermia has been induced in an individual of the species Carassius auratus gibelio Bloch, a number of metabolic reactions in the liver are blocked and simultaneously responses acquired in the course of evolution are triggered. As metabolic depression develops, the activity of the Krebs cycle mitochondrial enzymes increases by 20.4% for NADIDH and decreases by 10.2% for NADMDH; glycolysis enhances by 50.2%; caspase-3 and acid phosphatase become more active, which reflects the course of programmed ways of hepatocyte destruction along the lines of apoptosis, autophagy, and necrosis. Early regeneration processes are initiated. © Pleiades Publishing, Ltd., 2010.

Vinarski M.V.,Omsk State Pedagogical University
Zoosystematics and Evolution | Year: 2015

Lymnaea stagnalis (L., 1758) is among the most widespread and well-studied species of freshwater Mollusca of the northern hemisphere. It is also notoriously known for its huge conchological variability. The history of scientific exploration of this species may be traced back to the end of the 16th century (Ulisse Aldrovandi in Renaissance Italy) and, thus, L. stagnalis has been chosen as a proper model taxon to demonstrate how changes in theoretical foundations and methodology of animal taxonomy have been reflected in the practice of classification of a particular taxon, especially on the intraspecific level. In this paper, I depict the long story of recognition of L. stagnalis by naturalists and biologists since the 16th century up to the present day. It is shown that different taxonomic philosophies (essentialism, population thinking, tree thinking) led to different views on the species' internal structure and its systematic position itself. The problem of how to deal with intraspecific variability in the taxonomic arrangement of L. stagnalis has been a central problem that made systematists change their opinion following conceptual shifts in taxonomic theory. © Maxim V. Vinarski.

Kassal B.Y.,Omsk State Pedagogical University
Russian Journal of Biological Invasions | Year: 2014

In Omsk oblast, the red squirrel Sciurus vulgaris is represented by three chorological groups with different geographic and demographic characteristics. The first group lives in the southern taiga subzone and northern mixed and deciduous forests and represents an indigenous group of S. v. martensi. The second group is formed in the southern subzone of mixed forests as a result of the introduction in 1957–1960 of S. v. exalbidus into the territory of habitation of S. v. martensi and represents a hybrid group different from the aboriginal one in the ratio of native color morphs and population dynamics and density. The third group is formed in the central forest-steppe in artificial pine plantations as a result of the introduction in 1976–1984 of S. v. exalbidus into the free area; it is small with sparse density and a characteristic ratio of color morphs. © 2014, Pleiades Publishing, Ltd.

Bobrov P.P.,Omsk State Pedagogical University | Repin A.V.,Omsk State Pedagogical University | Rodionova O.V.,Omsk State Pedagogical University
IEEE Transactions on Geoscience and Remote Sensing | Year: 2015

The measuring methods of the complex relative permittivity (CRP) of the sample in the single coaxial cell at frequencies from tens of hertz to several gigahertz are represented. The frequency range is covered by two instruments: by an LCR meter (frequencies up to 5 MHz) and by a vector network analyzer (VNA) (frequencies from 0.3 MHz to several gigahertz). In the high band (0.1-8.5 GHz), the cell is a coaxial line segment filled with the investigated substance. To determine the CRP, the complex transmission coefficient (scattering matrix parameter S-12) of this cell is measured by using a VNA. For measurements in the middle range (0.3-100 MHz), the cell is included into the break of the central conductor of a coaxial line of a large cross section. The admittance of the cell is determined by measuring the scattering matrix parameter S-12 of the coaxial line of the large cross section. At frequencies below 1 MHz, the cell admittance is measured in the usual way by the LCR meter. Thus, CRP measurements of a substance placed in the same cell are carried out in the whole frequency range from 42 Hz to 8.5 GHz. The examples of CRP measurement of soils with different values of the dielectric constants and loss factors are given. It is shown that the CRP measurement error depends on the values of CRP and frequency. The measurement result error of relative dielectric permittivity obtained with the aid of this method is from 0.4% to 2%. © 1980-2012 IEEE.

Kassal B.Y.,Omsk State Pedagogical University
Russian Journal of Biological Invasions | Year: 2015

The experience of reintroduction of Siberian red deer Cervus elaphus sibiricus in Omsk oblast is described. The restoration of populations, area, and seasonal migratory routes has not taken place. Only a few individuals are settling over the territory of Omsk oblast and adjacent areas. © 2015, Pleiades Publishing, Ltd.

Kassal B.Y.,Omsk State Pedagogical University
Russian Journal of Biological Invasions | Year: 2013

Beginning in the 1830s, the Siberian weasel invaded the Irtysh zone from the east to the west in the forest zone and the north to the south from the forest zone to the forest-steppe and steppe zones. Initially, the abundance of the species gradually increased, underwent a rise with a 1.5- to 2-fold biotic excess capacity of the territory, and then decreased, which was followed by the formation of cyclic changes in the abundance with double intervals averaging 22.5 years. Now, the highest density of the Siberian weasel population is registered in the northern and central forest steppe, it is lower in the forest zone and minimum in the southern forest steppe and steppe. In addition, the biotic relations of the Siberian weasel are characterized as follows: neutralism complemented by the elements of commensalism (with badger, weasel, steppe polecat, ermine, and American mink); antibiosis (amensalism with European pine marten, fox, corsac fox, raccoon dog; competition with sable; predation by wolverine); relations with sable and European pine marten are antagonistic in a number of habitats. In order to understand cyclic changes in the size of the Siberian weasel population inhabiting the Middle Irtysh zone, additional study is required. © 2013 Pleiades Publishing, Ltd.

Vinarski M.V.,Omsk State Pedagogical University
Zoosystematics and Evolution | Year: 2014

In 1795, Georges Cuvier proposed a new classification of invertebrate animals based on anatomical data. He created a new concept of mollusks as representatives of a unique type of morphological organization of animals. Before Cuvier, the name "mollusks" was used only for cephalopods without external shells and slugs, whereas all shelled mollusks were placed in another taxon, Testacea. The Cuvier's works (1795, 1798) are considered here as the starting point of transformation of classical conchology (= study of shells) into modern malacology (= study of molluscous animals as whole organisms). This process ended in 1825 when the very term "malacology" was finally established by Ducrotay de Blainville. © M.V. Vinarski.

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