Hydrogen isotope exchange in proton-conducting oxides during proton and deuteron irradiation

It has been found that during accelerator beam deuteron irradiation of a proton-conducting oxide containing protium H/D isotope exchange between beam ions and dissolved ions takes place. This isotope exchange was also observed during high-energy proton irradiation of the oxide containing dissolved deuterium atoms. These results provide evidence to a new type of hydrogen isotope exchange. Any appreciable effects of conjugate diffusion of hydrogen and oxygen ions and of the interface processes on the isotope exchange rate were eliminated. In this type of exchange the rate of replacement of H+ by D+ and of D+ by H+ was determined only by the properties of the crystal. The discovered effect was used in our study to obtain experimental data characterizing the dynamic and equilibrium behavior of hydrogen isotopes in the oxide BaZr0.9Y0.1O3 - δ. © 2013 Pleiades Publishing, Ltd

Eurasian Security from the Perspective of the Concept of Information-Psychological and Cognitive Confrontation

The article is devoted to the analysis of the cognitive aspect of information and psychological confrontation in the Eurasian space, as well as to the study of the evolution of ideas that are currently commonly referred to by the term “information and psychological and cognitive confrontation”.Aim. To identify the specifics of ensuring Eurasian security in the perspective of the concept of information-psychological and cognitive confrontation.Tasks. To identify the information and psychological component in the CSTO collective security strategy, to analyze practical steps at the CSTO level in the field of countering destructive information influence, to determine the regulatory, political and organizational prerequisites for the formation of the CSTO collective information and psychological security system.Methods. The research uses both general scientific methods: analysis, synthesis, induction, and a number of special methods and approaches: comparative analysis, methodology of critical geopolitics, content analysis, informational and historical approaches.Results. The study showed that the formation of the modern concept of information-psychological and cognitive confrontation was significantly influenced by theoretical and applied research related to the understanding of the role of psychological operations and the use of special means of influencing the human psyche in modern military conflicts, as well as scientific developments in the field of studying modern methods of manipulation and propaganda, expanding the arsenal of means of hybrid conflicts, the weaponization of digital technologies, the emergence of new dimensions of international conflicts. Its subject includes systems and tools for the formation of public opinion, the peculiarities of human perception of information, as well as the whole range of methods and means of influencing public opinion and the psyche of an individual in peacetime and in combat conditions with the use of special information and psychological operations of strategic, tactical, operational level, as well as soft power tools.Conclusions. Today, more and more countries of the world are paying increased attention to the issues of ensuring information and psychological security. The desire of the post-Soviet states to preserve the political, economic and socio-cultural ties developed during their life in a single state, within the framework of new integration formats, the CIS, the EAEU, the CSTO, is increasingly faced with the problem of choosing a vector of foreign policy. Therefore, combining national interests and collective efforts to develop and conceptualize a unified approach to ensuring information and psychological security at the level of the main Eurasian cooperation formats, such as the EAEU, the CSTO and the SCO, is a priority task in the modern conflict realities of world politics

Analysis of the effectiveness of countering doping in sports in the framework of medical and biological support for athletes of national teams

Objective: analysis of the effectiveness of combating doping in sports in the process of medical and biological support of athletes forming the national teams of the Russian Federation, and determining its ways.Materials and methods: based on the reports of anti-doping organizations for 2017–2022, sociological studies of the prevalence of doping in sports and therapeutic use structures, a retrospective analysis of the dynamics of the main indicators reflecting the directions of various doping encounters was carried out.Results: a significant discrepancy was revealed between the assessment of the prevalence of anti-doping rule violations based on the results of sociological surveys and the results of laboratory anti-doping studies.A significant positive dynamic of approval of therapeutic use exemptions, which allowed doubling the share of positive decisions of anti-doping organizations is shown.The main directions of improving anti-doping work in the process of carrying out medical and biological support measures are determined

β2-agonists in sports: prevalence and impact on athletic performance

Respiratory disorders caused by exercise are expressed in the development of exercise-induced bronchoconstriction (EIB) and exercise-induced asthma (EIA), which are observed in athletes, especially in cyclic sports, much more often than in the population. Ventilation impairments are exacerbated by inhaled allergens, industrial pollutants and adverse environmental conditions, which increase the risk of EIB and asthma symptoms in athletes. The use of β2-agonists can prevent or eliminate ventilation disorders, however, it requires taking into account current anti-doping rules, which allow the use of certain substances in sports without a request for therapeutic use. The studies of the influence of β2-agonists on functional indicators of athletes and sports performance do not allow to make an unambiguous conclusion about its results. Medications with β2-agonists, approved for use in sports in the form of inhalation, do not have a significant effect on the performance of athletes at major sports competitions. At the same time, the systemic use of these substances and the use of any form of terbutaline caused a positive dynamics in functional indicators, which could lead to an illegal increase in the effectiveness of sports performance. Most of the conclusions about the effect of β2-agonists on outcome are based on a small number of studies, their heterogeneity, and an insignificant number of observations. It is necessary to continue studying the effects of β2-agonists in the course of randomized clinical trials in order to individualize therapy and prevent bronchial obstruction in athlete

Analysis of doctors’ appeals on the issues of countering doping in sports

Objective: the main topics of the doctors’ questions were the preparation of medical documents for a TUE application, the determination of the anti­doping status of various substances and methods, as well as the use of dietary supplements in sports.Materials and methods: an analysis was carried out of more than 400 appeals of doctors providing medical assistance to athletes of various levels on the issues of countering doping in sports. The aim of the work was to identify ways to improve educational and informational activities aimed at improving the quality of medical documents for TUE applications.Results: the need for continuous work to improve the level of doctors’ knowledge in countering doping in sports was confirmed, including clarification of the procedure for using documents from anti­doping organizations, the need to use TUE guidelines for physicians and the specifics of prescribing substances prohibited only during the competitive period

Synthesis, Structure and Electrical Properties of Li+-doped Pyrochlore Gd2Zr2O7

Received: 08.04.2020. Accepted: 20.05.2020. Published: 30.06.2020.The pyrochlore Gd1.55Li0.45Zr2O6.55 was prepared by the solution and solidstate methods. The introduction of lithium in the Gd-sublattice led to decrease in the lattice parameter a = 10.4830(8) Å in comparison with Gd2Zr2O7 (a =10.5346(2) Å). Monitoring of the lithium content in the sample during heat treatments showed a loss of lithium at temperatures above 1100 °C, so, to maintain the stoichiometry of lithium the low temperature sintering methods are required. The sample Gd1.55Li0.45Zr2O6.55 exhibited a predominant oxygen-ion transport over a wide range of temperatures. Although doping did not lead to an increase in the oxygen-ion conductivity compared to Gd2Zr2O7, it caused the suppression of the hole conductivity.The reported study was funded by RFBR and Sverdlovsk region, project number 20‑43‑660033a

Electrical Properties of Li+-Substituted Solid Solutions Based on Gd2Zr2O7

Abstract: Solid solution (Formula presented.) with a pyrochlore structure is synthesized for the first time. The cationic composition is confirmed via chemical analysis and nuclear reactions. It is found that the stoichiometry with respect to lithium is retained up to 1100°C. The lattice parameter diminishes in the homogeneity range 0 ≤ x ≤ 0.30, while the free volume of migration grows. Introducing lithium into the Gd sublattice raises oxygen–ion conductivity, due to the emergence of oxygen vacancies and enhancement of their mobility. Maximum conductivity is reached for composition with х = 0.10 (~1 × 10−3 Ω−1 cm−1, 650°C). An assumption is made about the formation of associates of the type (Formula presented.) at high contents of the dopant (x = 0.30), accompanied by an increase in the activation energy of conductivity. © 2021, The Author(s).This work was performed with a grant from the Russian Foundation for Basic Research, project no. 20-43-660033, and financial support from the State Atomic Energy Corporation ROSATOM (State Contract no. Н.4о.241.19.21.1070 of April 16, 2021; electronic identifier 07731000003210000330001)

Распространенность гиперурикемии у профессиональных спортсменов и ее роль в генезе различных патологических состояний и обменных нарушений

In recent decades, the prevalence of hyperuricemia (HU) is increasing worldwide; the role of uric acid (UA) in the genesis of various metabolic disorders, cardiovascular diseases, and kidney disease is being discussed. There are very few investigations of the rate of HU and its role in the development of diseases in certain social groups, including in professional athletes.Objective: to estimate the prevalence of HU and its role in the genesis of various pathological conditions and metabolic disturbances in professional athletes.Patients and methods. A retrospective comparative one-stage study was conducted, for which 2148 athletes who met inclusion criteria were selected and examined in the Federal Research and Clinical Center for Sports Medicine and Rehabilitation, Federal Biomedical Agency, in 2015. A control group consisted of 99 ageand sex-matched healthy volunteers examined at the V.A. Nasonova Research Institute of Rheumatology in 2017. The analysis included a comparison of the rate of HU and other examined parameters in professional athletes and healthy volunteers. The examined parameters were separately compared in athletes with/without HU, followed by statistical processing of results.Results. HU was detected in 306 (14.2%) of the 2148 athletes, more often in men (n=253 (20%) than in women (n=53 (6%); (p<0.001). The rate of HU in the athletes was comparable with that in the healthy population (12.1%). The athletes with HU (n=306) compared with the other athletes (n=1842) had the following statistically higher indicators: the mean serum levels of creatinine, triglycerides, aspartate aminotransferase, alanine aminotransferase, gamma-glutamyltranspeptidase, creatinine phosphokinase, and myoglobin, glomerular filtration rate, and body mass index (BMI) (p<0.00001 for all cases).Conclusion. HU is detected quite often in professional athletes (14.2%), which is comparable with the indicators seen in healthy volunteers (12.1%). The high prevalence of HU and its association with indicators reflecting kidney function, lipid metabolic disturbances, and BMI necessitate further investigations aimed at searching the causes of HU and methods of its prevention and treatment in professional athletes.В последние десятилетия распространенность гиперурикемии (ГУ) в мире увеличивается, обсуждается роль мочевой кислоты (МК) в генезе различных обменных нарушений, сердечно-сосудистых заболеваний, болезней почек. Исследований, посвященных изучению частоты ГУ и ее роли в развитии заболеваний в отдельных социальных группах, в том числе у профессиональных спортсменов, крайне мало.Цель исследования – оценка распространенности ГУ и ее роли в генезе различных патологических состояний, обменных нарушений у профессиональных спортсменов.Пациенты и методы. Проведено ретроспективное сравнительное одномоментное исследование, для участия в котором отобраны 2148 спортсменов, соответствующих критериям включения, обследованных на базе ФГБУ «Федеральный научно-клинический центр спортивной медицины и реабилитации Федерального медико-биологического агентства» в 2015 г. Группу контроля составили 99 здоровых добровольцев, сопоставимых по возрасту и полу, обследованных на базе ФГБНУ НИИР им. В.А. Насоновой в 2017 г. Анализ включал сравнение частоты ГУ и других исследуемых параметров у профессиональных спортсменов и здоровых добровольцев. Отдельно проводилось сопоставление исследуемых показателей у спортсменов с/без ГУ с последующей статистической обработкой результатов.Результаты. ГУ выявлена у 306 (14,2%) из 2148 спортсменов, чаще у мужчин (253, или 20%), чем у женщин (53, или 6%; p<0,001). Частота ГУ у спортсменов оказалась сопоставимой с таковой в здоровой популяции (12,1%). У спортсменов с ГУ (n=306) в сравнении с остальными спортсменами (n=1842) статистически выше были следующие показатели: средние сывороточные уровни креатинина, триглицеридов, а также аспартатаминотрансферазы, аланинаминотрансферазы, гамма-глутамилтранспептидазы, креатининфосфокиназы, миоглобина, скорости клубочковой фильтрации, индекса массы тела (ИМТ; р<0,00001 для всех случаев).Выводы. ГУ у профессиональных спортсменов выявляется достаточно часто (14,2%), что сопоставимо с показателями у здоровых добровольцев (12,1%). Высокая распространенность ГУ, ассоциация ее с показателями, отражающими функцию почек, нарушениями липидного обмена, ИМТ делают необходимыми дальнейшие исследования, направленные на поиск причин, методов профилактики и лечения ГУ у профессиональных спортсменов