156 research outputs found

    Clinical studies of phytogel "Kvertulidon" stomatoprotective action in patients with helicobacter gastritis

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    Background. To determine the therapeutic and prophylactic effect of oral applications of the Kvertulidon phytogel on the condition of the oral cavity in patients with Helicobacter gastritis. Methods. A total of 28 patients with a diagnosis of gastritis of Helicobacter pylori and 18 healthy individuals were surveyed. Phytogel was used as oral applications for 15 days. Hygiene and dental indices were determined, and the level of biochemical markers of inflammation, dystrophy and defenses in the oral fluid: elastase, catalase, urease, lysozyme activity, MDA content, API index and degree of dysbiosis. Results. A significant increase in all hygienic and dental indices was found in patients with gastritis with a decrease in the level of catalase and lysozyme. Applications of phytogel reduce the activity of elastase, urease, the content of MDA, the degree of dysbiosis and increase the activity of catalase, lysozyme, and the API index. Conclusion. Phytogel "Kvertulidon" has stomatoprotective effect in patients with helicobacter gastritis

    Instability and Chaos in Non-Linear Wave Interaction: a simple model

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    We analyze stability of a system which contains an harmonic oscillator non-linearly coupled to its second harmonic, in the presence of a driving force. It is found that there always exists a critical amplitude of the driving force above which a loss of stability appears. The dependence of the critical input power on the physical parameters is analyzed. For a driving force with higher amplitude chaotic behavior is observed. Generalization to interactions which include higher modes is discussed. Keywords: Non-Linear Waves, Stability, Chaos.Comment: 16 pages, 4 figure

    Characteristic features of the hydrocarbon composition of Spiridonovskoe (Tatarstan) and Pitch Lake (Trinidad and Tobago) asphaltites

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    © 2016, Pleiades Publishing, Ltd.A comparative study of the composition of natural asphaltites from surface deposits of oil-and-gas territories of the republics of Tatarstan and Trinidad and Tobago has been performed. Distinctive features of their component, structural-group, and hydrocarbon compositions have been revealed, as well as the fractional and structural-group composition of asphaltenes. It has been shown that the interlayer space in asphaltenes (dispersed phase) contains part of the dispersion medium, the composition of which stores information about the origin of asphaltites due to upward streams of deep waxy oil that has undergone both hydrothermal and bacterial alteration during migration and subsequent transformations

    Morphological and functional characteristics of Trichinella sp. larvae in bears and badgers in the Kirov Region

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    The purpose of the research is study of morphological and functional characteristics of Trichinella sp. larvae in bears and badgers in the Kirov Region.Materials and methods. The compressor trichinelloscopy (CT) method was used to study 72 sections of muscle tissue samples (in accordance with the Guidelines "Prevention of helminthiasis transmitted through meat and meat products" dated September 23, 1996) from animals obtained during scientific culling. The sections were prepared from the diaphragmatic peduncle muscles and the diaphragm of bears and badgers along the muscle fibers, and placed in the compressorium. The sections were then transferred to glass slides, and provisional slides were prepared and examined using various magnifications (× 8, × 20, × 40). Morphometric measurements were performed using a microscope at × 40 magnification, then the capsule index was calculated. Digestion (peptolysis) in artificial gastric juice was performed according to the P. A. Vladimirova’s method modified by A. V. Uspensky and F. Skvortsova after the test samples were placed in various temperature conditions from 5 to -18 °C, and the parameters of both animal species were compared. The viability of Trichinella sp. larvae was evaluated in a Petri dish in saline at a room temperature. Morphological changes were recorded in the larvae structure (coiled larvae against the total number of isolated, coiled and stretched larvae) and their mobility.Results and discussion. We studied badgers and bears infected by Trichinella spiralis larvae in the Kirov Region. The Trichinella sp. larvae were found in all examined sections of the infected animals. The infection intensity was higher in the badger than the bear and amounted to 218±79.5 larvae per 1 g of muscle, while it was 115±28.5 in the bear. The stated above is explained by the fact that the badger eats carrion more often, and typically visits spontaneous dumps. For postmortem diagnosis of trichinellosis in the obtained bears and badgers, we can use trichinelloscopy and peptolysis methods which are aimed at detecting infection sources and preventing zoonosis in humans

    Sphere rolling on the surface of a cone

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    We analyse the motion of a sphere that rolls without slipping on a conical surface having its axis in the direction of the constant gravitational field of the Earth. This nonholonomic system admits a solution in terms of quadratures. We exhibit that the only circular of the system orbit is stable and furthermore show that all its solutions can be found using an analogy with central force problems. We also discuss the case of motion with no gravitational field, that is, of motion on a freely falling cone.Comment: 12 pages, 2 figures, to be published in Eur J Phy

    The properties and structure of N-chloro-N-methoxy-4-nitrobenzamide

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    The XRD study of N-chloro-N-methoxy-4-nitrobenzamide revealed the high pyramidality degree of its amide nitrogen atom in O–N–Cl moiety. N-Chloro-N-methoxy-4-nitrobenzamide reacts with AcONa in MeCN selectively forming N-acetoxy-N-methoxy-4-nitrobenzamide, whereas its methanolysis in the presence of AcONa yields N,N' bis(4-nitrobenzoyl)-N,N'-dimethoxyhydrazine

    Volumes of polytopes in spaces of constant curvature

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    We overview the volume calculations for polyhedra in Euclidean, spherical and hyperbolic spaces. We prove the Sforza formula for the volume of an arbitrary tetrahedron in H3H^3 and S3S^3. We also present some results, which provide a solution for Seidel problem on the volume of non-Euclidean tetrahedron. Finally, we consider a convex hyperbolic quadrilateral inscribed in a circle, horocycle or one branch of equidistant curve. This is a natural hyperbolic analog of the cyclic quadrilateral in the Euclidean plane. We find a few versions of the Brahmagupta formula for the area of such quadrilateral. We also present a formula for the area of a hyperbolic trapezoid.Comment: 22 pages, 9 figures, 58 reference

    Phenotypes of Non-Alcoholic Fatty Liver Disease in Different Regions of the Russian Federation, Diagnostic and Therapeutic Approach in Clinical Practice

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    Aim: to present data on the prevalence of various phenotypes of non-alcoholic fatty liver disease (NAFLD), the features of its diagnosis and treatment in various regions of the Russian Federation following a meeting of chief gastroenterologists.Key points. Non-alcoholic fatty liver disease (NAFLD) holds the leading position among non-infectious liver diseases in the Russian Federation, its prevalence is 37.3 % and does not tend to decrease.To get information on various aspects of NAFLD diagnosis and treatment, opinion of 18 chief external regional gastroenterologists and leading specialists in the field of liver diseases was studied by analyzing the responses to questions specially formulated for them. Information on the situation in the Ural, Privolzhsky, Southern, Central and North-western Federal Districts was obtained. Regional statistics on the prevalence of NAFLD and its certain phenotypes (steatosis, steatohepatitis, cirrhosis), diagnostic instruments and treatment approaches which are used in clinical practice, as well as on the most common associated conditions was presented.Conclusions. The collected information allows to improve both administrative and treatment and diagnostic-related activities in managing patients suffering from this disease

    Phenotypes of Non-Alcoholic Fatty Liver Disease in Different Regions of the Russian Federation, Diagnostic and Therapeutic Approach in Clinical Practice

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    Аim: to present data on the prevalence of various phenotypes of non-alcoholic fatty liver disease (NAFLD), the features of its diagnosis and treatment in various regions of the Russian Federation following a meeting of chief gastroenterologists.Key points. Non-alcoholic fatty liver disease (NAFLD) holds the leading position among non-infectious liver diseases in the Russian Federation, its prevalence is 37.3 % and does not tend to decrease.To get information on various aspects of NAFLD diagnosis and treatment, opinion of 18 chief external regional gastroenterologists and leading specialists in the field of liver diseases was studied by analyzing the responses to questions specially formulated for them. Information on the situation in the Ural, Privolzhsky, Southern, Central and Northwestern Federal Districts was obtained. Regional statistics on the prevalence of NAFLD and its certain phenotypes (steatosis, steatohepatitis, cirrhosis), diagnostic instruments and treatment approaches which are used in clinical practice, as well as on the most common associated conditions was presented.Conclusions. The collected information allows to improve both administrative and treatment and diagnostic-related activities in managing patients suffering from this disease
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