Coronavirus and Globalization: Knowledge vs Concept

The coronavirus pandemic has generated a lot of talk about the post-coronavirus future of the world community and has drawn close attention to the globalization process. The article notes that something similar in the public consciousness took place after the publication of the first report to the Club of Rome, when the awareness of the danger posed by global problems had quickly come. Now, one of the global problems — the coronavirus pandemic — has changed the usual life rhythm of the entire world community in a matter of weeks. The relevance of the topic is so high that even those who, before that, not only professionally, but even seriously were not interested in either the problems of medicine or global problems, actively joined its discussion. As a result, on the pages of many print and electronic publications, along with serious and verified information, all sorts of guesses and speculations about the nature and correlation of coronavirus and globalization are multiplied. Only knowledge can be opposed to this, according to the authors

Effect of subphase conditions on the formation of graphene Langmuir monolayer

This work was supported by grant from DAAD 4.9977.2017/5.2

Results of applying acidic hydraulic fracturing with proppant in the Tournaisian-Famennian reserves at the Ozernoe field

The paper is devoted to the efficiency of acidic hydraulic fracturing – the most widespread method of well stimulation for the Tournaisian-Famennian carbonate reserves found in the Ozernoe field. All the operations performed may be divided in two groups: acidic hydraulic fracturing performed by the conventional technology when fracture openness is reached by wall profile following the reaction of acid with rock, and acidic hydraulic fracturing with proppant. At the site investigated 12 operations of proppant fracturing were performed. To assess the results, including comparison with the conventional acidic hydraulic fracturing, the well investigation data were obtained under nonsteady flow before and after the treatment. In doing so, pressure build up curves were processed by standard methods and that of Warren-Root to evaluate fracturing level. Two wells were chosen with similar production profile and formation flow characteristics prior to well intervention, which were explored twice afterwards. The reservoir was classified as porous for both wells in accordance with pressure build up curve. Following acidic hydraulic fracturing in both cases reservoir fracturing was observed with average fracture openness from 10 to 30 µm. However, nine months after the intervention no fracture were found in the well subjected to conventional acidic hydraulic fracturing, with the same formation flow and production characteristics as before the intervention. The well processed by proppant acidic hydraulic fracturing demonstrates fracturing immediately after the intervention and almost two years later, which testifies to the technology efficiency. The conclusions made were confirmed by field data

Study of the surface microrelief of copper nanoparticles by the method of scanning probe microscopy

This work was supported by grants from the RFBR № 17-07-00407-а and № 17-32-50137-mol_nr

Comparative evaluation of the effectiveness of a peptide-containing drug and polyoxydonium in the treatment of chronic parodontitis

Currently, the available methods of treating parodontitis are not able to have a complex effect. Therefore, in recent years, there has been an active search and development of new methods of treatment and new drugs that have a complex etiopathogenetic effect on this disease. This article provides a comparative evaluation of the classical and experimental methods of treating chronic periodontitis. Based on the reconstruction of an experimental model of chronic inflammation of periodontal tissues of the Wistar rat line, we compared methods of topical therapy by “Organosilicon Glycerohydrogel – Peptide” and “Polyoxidonium” compositions. A comparative assessment of the activity of these drugs with control groups, which were treated with “Organosilicon Glycerohydrogel” and “Metrogyl Denta”, was carried out. Previously, we carried out separate studies of the effectiveness of the use of the composition “organosilicon glycerohydrogel – peptide”, as well as the method of treatment of periodontitis, by injecting the drug “Polyoxidonium”. They have been compared with the classic treatment for this disease to obtain relevant data and results. In our opinion, the data obtained are of considerable interest. The assessment and comparison of clinical and histological data have been carried out, which showed that all drugs had a positive effect on the processes of tissue regeneration. However, the composition “Organosilicon Glycerohydrogel-peptide”, due to the characteristics of the hydrogel, which is acting as a transcutaneous conductor, showed a faster antimicrobial and pathogenetic effect, which allows a comprehensive approach to solving this problem. In comparison with the groups of “Organosilicon Glycerohydrogel” and “Polyoxidonium”, the period of clinical improvement increased by 57% in the group of “Glycerohydrogel-Peptide”, and, in the “Metrogyl Denta” group, the indicators improved by 15% approximately

Individual and typological factors influencing the regulation of physiological adaptation to physical activity of schoolchildren with different age and gender

The article presents results of a comparative survey of cardiovascular system parameters and of integral indexes of physical health diagnostics in differentiated groups of children by age and sex. The children being examined are of 11, 12, 13, 14, 15, and 16 years old. We studied the dynamics of adaptation processes, which are determined by the sex-age features of the ontogeny of the child’s organism and by environmental factors, affecting the development of physical activity in the course of physical education in educational institutions. In addition, we have established sex-age patterns of children’s adaptation at the stages of second childhood, adolescent, and early adolescence. The results obtained contribute to a new field of physiology, age adaptology, which allows to predict and prevent dysontogenetic abnormalities in the development of the child’s organism

Entropy as a function of Geometric Phase

We give a closed-form solution of von Neumann entropy as a function of geometric phase modulated by visibility and average distinguishability in Hilbert spaces of two and three dimensions. We show that the same type of dependence also exists in higher dimensions. We also outline a method for measuring both the entropy and the phase experimentally using a simple Mach-Zehnder type interferometer which explains physically why the two concepts are related.Comment: 19 pages, 7 figure

A relativistic model of the NN-dimensional singular oscillator

Exactly solvable $N$-dimensional model of the quantum isotropic singular oscillator in the relativistic configurational $\vec r_N$-space is proposed. It is shown that through the simple substitutions the finite-difference equation for the $N$-dimensional singular oscillator can be reduced to the similar finite-difference equation for the relativistic isotropic three-dimensional singular oscillator. We have found the radial wavefunctions and energy spectrum of the problem and constructed a dynamical symmetry algebra.Comment: 8 pages, accepted for publication in J. Phys.

Microscopic and elemental analysis of jaw bone tissue in injury

Since the jawbone tissue is injured at the stage of metal dental implant introduction, the problem of inflammatory complication development leading to a breakdown in osseointegration remains relevant. Of interest are the immunological mechanisms of inflammatory process development during the emission of metal nanoparticles, as well as the mechanisms of its subsidence after the removal of a metal object. Microscopic and elemental analysis of the bone tissue of the Wistar rat lower jaw after artificial traumatization was carried out. During the experiment, the situation of presence of a metal foreign body in the bone bed was simulated. An insulin needle was injected into the connective tissue of the lower jaw, followed by its removal after seven days. Microscopic analysis of bone tissue was performed using a Tesscan Vega 4 scanning electron microscope. The teeth alveoli cortical layer surface, connection of the jaws with a gap, stratification of the cartilaginous layer were determined at low magnification in direct projection. Using higher magnification in the direct projection there are visible dense-structural crystalline inclusions, foci of necrosis in the area of junctions of the jaws alveolar processes. The elemental composition of bone tissue was obtained by atomic emission spectroscopy by iCAP 6300 Duo. In the test sample, the quantitative ratio of calcium and phosphorus was 1.68, which slightly exceeds the optimal value of 1.67. An upward change in this ratio indicates a decrease in phosphorus level, which can be interpreted as local osteoporosis. In addition, the following elements were found: Bi, Ga, Pb, Ti, Zn in the amount of 0.03-0.06 mass percent. The list of these elements corresponds to the chemical composition of an insulin needle, indicating the penetration of metal particles into bone bed tissues. The emission of nanoparticles and their subsequent association to micro- and submicron sizes, their persistence, as well as biocorrosion in areas of active bone formation can be a trigger for the development of an aseptic inflammatory process. This effect is due to both a direct damaging factor and an indirect effect through specific signal molecules produced in response to tissue damage