Magnetic Phase Transitions in the NdFe_3(BO_3)_4 multiferroic

Low temperature studies of the behavior of the sound velocity and attenuation of acoustic modes have been performed on a single crystal NdFe_3(BO_3)_4. Transitions of the magnetic subsystem to the antiferromagnetically ordered state at T_N \approx 30.6 K have been revealed in the temperature behavior of the elastic characteristics. The features in the temperature behavior of elastic characteristics of the neodymium ferroborate and its behavior in the external magnetic field, applied in the basic plane of the crystal, permit us to suppose that the transition to an incommensurate spiral phase is realized in the system. This phase transition behaves as the first order one. H-T phase diagrams for the cases H \parallel a and H \parallel b have been constructed. The phenomenological theory, which explains observed features, has been developed

Проблемы достижения правовой эффективности при рассмотрении групповых исков

The paper examines the procedure for considering a class action in the Russian civil procedure in order to identify obstacles to the effective application of this institution. In developed foreign legal orders, group proceedings are a popular socially significant jurisdictional procedure for considering a large number of the same type of requirements, which allows optimizing the burden on the judicial system, ensuring the achievement of legal certainty and the effectiveness of judicial protection. As a result of the reform of group production, an institution sui generis appeared, which differs in many respects from foreign analogues. Given that group proceedings in Russia are still not in demand, the authors has identified obstacles to the intensification of this procedure, many of which indicate a superficial regulation of the procedural form.The study used comparative legal, formal logical and systemic structural methods, which made it possible to give a comprehensive assessment of the identified gaps in the legal regulation of group proceedings in Russian civil, commercial and administrative litigation. The first of the identified problems is related to the lack of regulatory rules for certification of a group of persons. To initiate proceedings on a class action, it is necessary to join a significant number of co-plaintiffs, whose claims are based on homogeneous legal and factual circumstances. However Russian procedural codes do not regulate the criteria by which certification of a group should be carried out, and also do not establish rules for accepting a court ruling on preparing a case for trial, allowing members to subsequently authorize. It is noted that for effective group proceedings it is necessary to issue an appropriate definition, which would define the criteria for the homogeneity of the grounds for claims and the method of protecting the violated right chosen by the applicant. The law should directly provide for the possibility of appealing against such a judicial act. Also, for the purposes of joining the requirements to protect the interests of a group of persons, it is proposed to publish a notice on the initiation of proceedings not only on the websites of the court and the defendant, but also in the official media.The problems of implementing the qualities of the legal force of a court decision on a class action, such as exclusivity and prejudice, are also identified, since the law allows challenging the circumstances established when considering a class action when considering a personal claim of a member of a class who has not joined a class action in the future.Исследуются правила группового производства в российском цивилистическом процессе. Выявлены пробелы, препятствующие достижению правовой эффективности при рассмотрении коллективных исков, предложены способы преодоления соответствующих лакун.  Сделаны  выводы о  необходимости  нормативной  регламентации процедуры сертификации группы лиц и вынесения судом соответствующего определения на стадии подготовки дела к судебному разбирательству, и необходимости применения единого средства массовой информации и сайта суда, рассматривающего дела, а также ресурсов электронного судопроизводства, применяемых в цивилистическом процессе в целях эффективного формирования состава участников группы лиц. Выявлено несовершенство правового регулирования качеств преюдициальности решения суда по групповому иску, ограничивающее начала состязательности и равноправия при рассмотрении личных исков в последующем

Specifics of geological composition, geochemistry and geochronology of rocks from the Kresty alkaline-ultrabasic massif (Maimecha-Kotui province, Polar Siberia)

In this work, we demonstrate new data that allows us to accurate geochronological ranges of formation of the Kresty alkaline-ultrabasic massif, which is considered to be a satellite of the Gulinian giant pluton. We also interpreted geological, geochemical and isotope-geochemical data obtained earlier for major varieties of this volcanic-plutonic association taking into account new geochronological results, as well as considered new aspects/information on matter source of alkaline-ultrabasic massifs from this province. One of the main aspects is interaction of Siberian super plume matter with hosting substrate of Siberian craton continental crust

Development of secondary mitochondrial dysfunction of mononuclear blood leukocytes in patients with chronic obstructive pulmonary disease and chronic bronchitis

Aim. To study the indicators of energy metabolism and oxidative stress in mononuclear leukocytes of peripheral blood and to assess the possibility of mitochondrial dysfunction development in chronic obstructive pulmonary disease and chronic bronchitis. Methods. The study included 50 patients aged 40 to 75 years with chronic obstructive pulmonary disease (COPD) or chronic bronchitis. The first group included 13 patients with chronic bronchitis. In accordance with the GOLD spirometric classification, the second and third groups included patients with COPD of moderate severity (COPD 2) (n=17) and severe COPD (COPD 3) (n=20) respectively. In the isolated mononuclear leukocytes, the activity of superoxide dismutase (SOD), succinate dehydrogenase (SDH) and concentration of succinate were determined, a complex evaluation of oxidative modification of proteins was performed. Results. Patients with chronic bronchitis compared to patients with COPD 2 and COPD 3 were found to have in mononuclear leukocytes higher activity of SOD by 3.38 times (p=0.0025) and 3.15 times (p=0.0058), higher activity of SDH by 4.55 times (p=0.0281) and 2.5 times (p=0.0263) and higher succinate concentration by 2.05 (p=0.0133) and 1.89 (p=0.005) times respectively. The level of spontaneously oxidized modified proteins in the group of patients with chronic bronchitis decreased by 2.45 (p=0.0176) and 2.94 (p=0.0168) times compared to the patients of groups 2 and 3, respectively There was a decrease in the reserve-adaptive potential of oxidative modification of proteins in COPD in the form of an increase of the ratio of spontaneously oxidized-modified proteins to metal-induced oxidized proteins by 1.58 times (p=0.0301) between groups 1 and 2, and by 1.44 times between groups 2 and 3 (p=0.0446). Conclusion. In mononuclear leukocytes of COPD patients, secondary mitochondrial dysfunction is observed accompanied by significant oxidative damage of lymphocytes and monocytes. Patients with severe COPD compared to patients with COPD of moderate severity have less reserve-adaptive potential for the oxidative modification of mononuclear leukocyte proteins, which probably reflects a more severe course of the disease

Influence of magnetic field on paramagnetic-ferromagnetic transition in La1−x_{1-x}Cax_{x}MnO3_{3} (x≈0.25x\approx 0.25) crystal: ultrasonic and transport studies

The ultrasonic properties of La$_{1-x}$Ca$_{x}$MnO$_{3}$ ($x\approx 0.25$) with the Curie temperature $T_C$ about 200 K are studied. Temperature dependences of longitudinal and transverse sound velocities were measured in zero magnetic field and for different constant magnetic fields as well. The ultrasonic study is supported by magnetic, resistive, magnetoresistive, structural and other measurements of the sample that facilitate interpretation of the results obtained. The magnetic field influence on sound properties found in this study presents some new features of the interplay between the elastic and magnetic properties of these compounds. It is shown that the paramagnetic-ferromagnetic transition in the sample studied is first order, but can become second order under the influence of applied magnetic field.Comment: submitted to Phys. Rev.

Fungal literature records database of the Northern West Siberia (Russia)

Background Mycological research in the Northern part of West Siberia has now become sufficient for review and digitisation as over 460 scientific works have been completed mainly since the beginning of the 20th century. The history of research in the region started from isolated studies at the beginning of the 20th century, but regular and systematic research started from the 1970s. Over the following decades, several dozens of researchers have worked in the area, but the reported occurrences were scattered amongst a broad variety of publications, mainly hardly available. The great need in digitisation and accumulation of fungal records reported in published literature in a standardised regional database has now become evident. The «Fungal records database of the Northern West Siberia» (FuNWS) was initiated in 2016 according to contemporary biodiversity data standards (Darwin Core), to be compatible and accessible by the broad research community. The database has been supplemented ever since by the collective effort of specialists working in the area. According to the database summary report, there are 3358 fungal and fungus-like species revealed in the Northern West Siberia at present. The richest in species number classes are Agaricomycetes (60%) and Lecanoromycetes (33%) with a total of 25 classes represented. The FuNWS database was uploaded to Global Biodiversity Information Facility (GBIF) (Ygra State University Biological Collection publisher) on 11 November 2017 (earlier titled «Fungal Records Database of Yugra, FReDY») to provide open access to the data and its reusability (Filippova et al. 2020). New information This publication summarises the results of the digitisation of literature-based occurrence records of fungi and fungus-like organisms initiated in the Northern part of West Siberia for the first time in the history of mycological research. The bibliography of regional mycological publications was created to include about 460 published works (Suppl. material 2). In total, about 140 literature sources were digitised and about 22000 occurrence records were integrated into the FuNWS database (Filippova et al. 2020). © Filippova N et al.20-04-00349Russian Foundation for Basic Research, Ð Ð¤Ð¤Ð : 18-05-00398Russian Foundation for Basic Research, Ð Ð¤Ð¤Ð : 13-01-20/39, 18-44-860017The research was funded by the Russian Fund for Basic Research and Government of the Khanty-Mansiysk Autonomous region according to the research project 18-44-860017 and grant 13-01-20/39 of the Yugra State University. Anton G. Shiryaev was partially funded by the Russian Foundation for Basic Research No 18-05-00398 А. Elena A. Zvyagina was supported by the KhMAO – Ugra government assignment for Surgut State University №20-04-00349. А. S. Arefyev was supported by the Fundemental research programme of the Tyumen Scientific Center SB RAS VI.52.1. project number AAAA-A17-117050400146-1. The authors are grateful to Ilya Filippov for preparation of a graph

Genesis of precious metal mineralization in intrusions of ultramafic, alkaline rocks and carbonatites in the north of the Siberian platform

The gold and platinum-group elements (PGE) mineralization of the Guli and Kresty intrusions was formed in the process of polyphase magmatism of the central type during the Permian and Triassic age. It is suggested that native osmium and iridium crystal nuclei were formed in the mantle at earlier high-temperature events of magma generation of the mantle substratum in the interval of 765–545 Ma and were brought by meimechite melts to the area of development of magmatic bodies. The pulsating magmatism of the later phases assisted in particle enlargement. Native gold was crystallized at a temperature of 415–200◦C at the hydrothermal-metasomatic stages of the meimechite, melilite, foidolite and carbonatite magmatism. The association of minerals of precious metals with oily, resinous and asphaltene bitumen testifies to the genetic relation of the mineralization to carbonaceous metasomatism. Identifying the carbonaceous gold and platinoid ore formation associated genetically with the parental formation of ultramafic, alkaline rocks and carbonatites is suggested

Opportunities and Prospects for the Introduction of Digital Technologies in the Organization of Sports and Physical Education

Анализируются релевантные возможности применения дистанционного формата оценки и контроля параметров тренированности и здоровья спортсменов. Цель исследования — рассмотреть возможности и процесс внедрения цифровых технологий на этапе контроля тренером и самоконтроля функционального состояния. Проведен контент-анализ публикаций, представленных в открытом доступе. Выделены группы мобильных технологий для мониторинга показателей функционального состояния занимающихся физической культурой и спортом. При организации тренировочного процесса в дистанционном режиме в том числе в периоды ограничения коммуникации, используют цифровые технологии по следующим направлениям: спортивная подготовка, оздоровительная физическая культура и фитнес, диагностика функциональных состояний, психодиагностика, мониторинг физического состояния и здоровья лиц, занимающихся физической культурой и спортом, а также лиц с ограниченными возможностями.The relevant possibilities of using a remote format for assessing and monitoring the fitness parameters of athletes are analyzed. The purpose of the study — to consider the possibilities and process of introducing digital technologies at the stage of coach control and self-control of the functional state. The content analysis of the publications presented in the public domain was carried out. Groups of mobile technologies for monitoring indicators of the functional state of those engaged in physical culture and sports are identified. When organizing the training process remotely, including during periods of limited communication, the use of digital technologies is carried out in the following areas: sports training, healthimproving physical culture and fitness, diagnostics of functional states, psychodiagnostics, monitoring of the physical condition and health of persons engaged in physical culture and sports, as well as persons with disabilities. This will allow us to develop and improve the theoretical justification and practical forms of digital resources in the work of the trainer