X-Ray Structural Study of 09Nn2Si Steel Welded Joints

The article is devoted to handling a vital scientific and technical problem of improving operational reliability and safety of critical constructions, exploited in Siberia and Far North, by developing of new technological approaches to welding. In the article results of X-ray diffraction examinations of 09Mn2Si steel welded joints are given, produced by different welding operations. Resulting from researches, the authors have concluded that pulse-arc welding is the most preferred welding process as compared with direct current welding

Aggregate ranking of the world's leading universities

The paper presents a methodology for calculating the aggregate global university ranking (Aggregated Global University Ranking, or AGUR), which consists of an automated presentation of the comparable lists of names for different universities from particular global university rankings and a simple procedure of aggregating particular global university rankingsyesBelgorod State Universit

Construction IF-scoring rule within the framework of new generation of metric citations

Basing on the scoring rule approach, there was designed a citation metrics, allowing for not only the number of author’s articles published and their citations but also the impact factors of journals in which the articles were published as well as the impact factors of journals with articles citing the autho

Seasonal changes in chlorophyll and carotenoid content in needles of scots pines (pinus sylvestris l.) Exposed to the thermal field of a gas flare

Seasonal changes in chlorophyll (Chl) and carotenoid (Car) content were analyzed in needle samples from young Scots pines (Pinus sylvestris L.) growing in the thermal field zone at various distances from the petroleum gas flare. Experiments were performed in Khanty Mansi Autonomous Area (Yugra) of Russia throughout the autumn–winter–spring period. Two hypotheses were subject to verification: (1) the thermal field of petroleum gas combustion flame imitates the influence of climate warming on plants, thus affecting the pigment complex of the photosynthetic apparatus (PSA) in pine needles; (2) transformations of PSA pigment complex in pine needles throughout the autumn–winter–spring period are sensitive to a long-term rise in ambient temperature by 1–2°С. In the winter period, the seasonal dynamics of certain PSA parameters comprised maxima and minima that are supposedly due to the regulation of Chl and Car content upon changes in air temperature. In trees growing under divergent thermal conditions, seasonal changes of these parameters were not synchronous. Analysis of seasonal changes revealed that winter-related transformations of the PSA structural–functional condition in needles are subject to consistent variations at different distances from the gas flame. The PSA activity of needles throughout the studied period was higher near the flame and decreased with the distance from the gas flare. When Chl content in needles decreased in autumn–winter, the smallest reduction was observed in the location near the gas flare (site I) where temperature was 1–2°C higher than the background level. The intermediate decrease in pigment content was noted at a moderate distance from the flame (site III), while the most pronounced decrease occurred at the largest distance from the gas flare (site VII). At the same time, the Chl a/b content ratio in needles was consistently lower for trees located at site I than at site VII. Hence, the amount of light-harvesting complexes in chloroplasts from trees grown at site I was higher than the amount of photosystems in the same chloroplasts. The Chl (a + b)/Car ratio in needles of trees grown near the gas flare (site I) was higher than in locations III and VII. This ratio displayed two significant peaks in the winter dynamics, which was supposedly due to the sufficient preservation of green pigments. Divergent seasonal changes in Chl and Car content and their dissimilar correlations with air temperature indicate that the pools of these pigments are controlled by different mechanisms. The actual Chl content, determined by the balance of pigment degradation and synthesis, should depend on the environmentally modified Chl synthesis and on the protective function of Car. Photosynthesizing cells produce additional amounts of carotenoids during autumn–winter, thus preventing the photodegradation of Chl in the period from autumn to late spring. © 2021, Pleiades Publishing, Ltd.This work was supported by the Comprehensive Program of the Ural Branch of the Russian Academy of Sciences for 2018–2020 (project no. 18-4-4-10) and by a state assignment to the Institute Botanic Garden of the Ural Branch of the Russian Academy of Sciences

On the superfluidity of classical liquid in nanotubes

In 2001, the author proposed the ultra second quantization method. The ultra second quantization of the Schr\"odinger equation, as well as its ordinary second quantization, is a representation of the N-particle Schr\"odinger equation, and this means that basically the ultra second quantization of the equation is the same as the original N-particle equation: they coincide in 3N-dimensional space. We consider a short action pairwise potential V(x_i -x_j). This means that as the number of particles tends to infinity, $N\to\infty$, interaction is possible for only a finite number of particles. Therefore, the potential depends on N in the following way: $V_N=V((x_i-x_j)N^{1/3})$. If V(y) is finite with support $\Omega_V$, then as $N\to\infty$ the support engulfs a finite number of particles, and this number does not depend on N. As a result, it turns out that the superfluidity occurs for velocities less than $\min(\lambda_{\text{crit}}, \frac{h}{2mR})$, where $\lambda_{\text{crit}}$ is the critical Landau velocity and R is the radius of the nanotube.Comment: Latex, 20p. The text is presented for the International Workshop "Idempotent and tropical mathematics and problems of mathematical physics", Independent University of Moscow, Moscow, August 25--30, 2007 and to be published in the Russian Journal of Mathematical Physics, 2007, vol. 15, #

Large-scale Samples Irradiation Facility at the IBR-2 Reactor in Dubna

The irradiation facility at the beam line no.3 of the IBR-2 reactor of the Frank Laboratory for Neutron Physics is described. The facility is aimed at irradiation studies of various objects with area up to 800 cm$^2$ both at cryogenic and ambient temperatures. The energy spectra of neutrons are reconstructed by the method of threshold detector activation. The neutron fluence and $\gamma$ dose rates are measured by means of alanine and thermoluminescent dosimeters. The boron carbide and lead filters or $(n/\gamma)$ converter provide beams of different ratio of doses induced by neutrons and photons. For the lead filter, the flux of fast neutrons with energy more than 0.1 MeV is $1.4 \cdot 10^{10}$ \fln and the neutron dose is about 96\% of the total radiation dose. For the $(n/\gamma)$ converter, the $\gamma$ dose rate is $\sim$500 Gy h$^{-1}$ which is about 85\% of the total dose. The radiation hardness tests of GaAs electronics and materials for the ATLAS detector to be put into operation at the Large Hadron Collider (LHC) have been performed successfully at this facility

Treatment optimization of patients with epithelial coccygeal passage complicated by an abscess

Background: Despite the wide variety of epithelial coccygeal passage treatment methods, the choice of the type of surgery is still an issue to be discussed. It is due to the heterogeneity of the clinical material, the variety of pathological processes and development of the pathology. In spite of the absence of serious complications in most cases, it causes a significant deterioration of life quality and reduction of work capacity in patients of the most active age group.Objective: Improvement of the treatment results of patients with epithelial coccygeal passage complicated by an abscess by means of vacuum therapy of a sutured postoperative wound (Russian Patent 2764499 date 07.04.2021).Material and methods: The study included 59 patients: 19 people in the main group, who underwent surgical treatment of the epithelial coccygeal passage complicated by an abscess, using vacuum therapy according to the proposed method. A retrospective analysis of the medical histories of patients who underwent surgical treatment of the epithelial coccygeal passage complicated by an abscess has been carried out by means of the traditional method of wound closure with drainage. These patients were included in the control group of 40 people.Results: In the control group purulent-inflammatory complications were recorded in 4 (10%) patients. Out of 19 people of the main group operated on according to the method proposed by us, purulent-septic complications were not recorded in any of the patients. Wound bandaging has been performed 71 times in 19 patients of the main group, and 454 times in 40 patients of the control group. For 19 patients of the main group the duration of the antibiotic therapy lasted 96 days, for 40 patients of the control group - 306 days. The average number of bed-days for patients of the control group was 10.63, in the main group - 7.56.Conclusion: The use of the proposed method of surgical treatment of epithelial coccygeal passage complicated by an abscess, by means of vacuum therapy at all stages of treatment, made it possible to improve treatment results in patients of the main group

Modern methods for acne scar correction. Review

The article presents recent data on the acne scars occurrence frequency, etiopathogenesis and classification. It was conducted the effectiveness analysis of existing methods of atrophic acne scars correction, including chemical peels, dermabrasion, needling, surgical techniques, fillers augmentation, laser and light therapy, objectively were assessed side effects and complications during treatment. It were reviewed indications, advantages and disadvantages of each method. The topicality, efficacy and safety of ablative fractional thermolysis were justified.В статье представлены современные данные о частоте встречаемости, этиопатогенезе и классификации рубцов постакне. Проведен анализ эффективности существующих методик коррекции атрофических рубцов постакне, в том числе с помощью химических пилингов, дермабразии, нидлинга, хирургических техник, аугментации филлерами, лазеро- и светотерапии, дана объективная оценка побочных действий и осложнений в процессе лечения. Рассмотрены показания, преимущества и недостатки каждого метода. Обоснована актуальность, эффективность и безопасность применения аблятивного фракционного термолиза

Seasonal Dynamics of Content of Antioxidant System Component in Needles of Scots Pine (Pinus sylvestris L.) Trees Situated in the Local Warming Impact Zone

The seasonal changes in a period of low temperatures and characteristic correlations of some antioxidant system (AOS) components in pine needles influenced by a gas flare are investigated in this study. The parameters taken are total water content (TWC) in needles, peroxidase activity (AP) and selected elements of the antioxidant system of needles, such as content of carotenoids (Car), ascorbic acid (AA), catechins (Cat) and flavanols (Fl). The needles come from Scots pine trees (Pinus sylvestris L.), which grow in a gradient of environmental conditions formed in the zone of thermal field of the gas flare impact (at various distances). The gas flare is situated on the territory of the Khanty-Mansiysk Autonomous Okrug (UGRA) of Russia. Three hypotheses were subject to verification: 1) the thermal field of the gas flare during the low temperature period affects the water exchange and the AOS state of needles; 2) increase in temperature of the environment in the flare impact zone during the autumn-winter period causes the decrease in amount of moisture in needles, which is a trait of oxidative stress in cells; 3) in the functioning of a needle's AOS, there are correlations between its components, which values depend on distance from the gas flare and environment created by it. It was found that in the thermal field gradient of the flare, there is neither an additional reduction in TWC in needles compared to the background nor signs of change in the state of AOS corresponding to the oxidative stress in the cells. The greatest impact of the gas flare on characteristics of the physiological state of pine needles is observed in the section closest to the flare. It reveals in the higher values of AP, TWC, Car and decrease in concentration of Fl and AA. The seasonal dynamics of the studied traits values do not correlate with the temperature of the environment. It indicates the indirect effect on the regulation of needle's AOS activity. The factor and correlation analysis of the data indicate a difference in physiological state of pine needles at different distances from the flare. There is no domination of any processes in the functioning of AOS components. The observed correlations between the studied properties change according to distance to the flare. The most stable is a negative AP relationship with ofter parameters, which rise with the increased distance from the flare. The consistency degree of separate AOS components functioning is maximal in background conditions and decreases when approaching the flare. This fact is explained by the modifying effect of the flare on physiological and biochemical processes of the needle's adaptation to specific climatic conditions of the environment.Исследовали сезонные изменения в период низких температур и характер корреляционных связей для содержания общей воды в хвое, пероксидазной активности и содержания отдельных компонентов антиокислительной системы хвои: каротиноидов, аскорбиновой кислоты, катехинов и флавонолов – у деревьев сосны обыкновенной (Pinus sylvestris L.), произрастающих в градиенте условий среды, формируемых в зоне влияния теплового поля газового факела (на разном удалении от него) на территории Ханты-Мансийского автономного округа – Югры (Россия). Проверены 3 гипотезы: 1) тепловое поле газового факела в условиях низких температур влияет на водный обмен и состояние антиокислительной системы хвои; 2) повышение температуры среды в зоне влияния факела в осенне-зимний период приводит к уменьшению количества влаги в хвое, которое вызывает состояние окислительного стресса в клетках; 3) в работе антиокислительной системы хвои между ее отдельными компонентами существуют взаимосвязи, характеристики которых трансформируются в зависимости от условий среды, определяемых удалением от газового факела. В градиенте действия теплового поля факела не наблюдается дополнительного по сравнению с фоном снижения содержания общей воды в хвое и признаков изменения состояния антиокислительной системы, характерных для окислительного стресса. Влияние газового факела на показатели физиологического состояния хвои максимально на ближней к факелу секции. Оно проявляется в виде увеличения пероксидазной активности, количества общей воды, каротиноидов и в снижении содержания флавоноидов и аскорбиновой кислоты. Сезонная динамика изученных показателей не коррелирует с температурой среды, что говорит о ее непрямом действии на регуляцию активности антиокислительной системы хвои. Факторный и корреляционный анализ данных свидетельствуют об отличии физиологического состояния хвои на разном удалении от факела. В функционировании компо- нентов антиокислительной системы хвои не наблюдается доминирования отдельных процессов. Взаимосвязи между изученными показателями изменяются с удалением от факела. Наиболее устойчивой является отрицательная связь пероксидазной активно- сти с остальными показателями, усиливающаяся с увеличением расстояния до факела. Степень согласованности работы отдельных компонентов антиокислительной системы максимальна в условиях фона и уменьшается с приближением к факелу. Это объясняется модифицирующим влиянием факела на физиолого-биохимическиеThis work was financially supported by the Comprehensive Program of the Ural Branch of the Russian Academy of Sciences for 2018-2020 (Grant No. 18-4-4-10) and within the state assignment of the Federal State Budgetary Institution of Science ?Institute Botanic Garden of the Ural Branch of the Russian Academy of Sciences?

К МЕТОДИКЕ ОЦЕНКИ ПЕРФУЗИИ МИОКАРДА ЛЕВОГО ЖЕЛУДОЧКА ПРИ ИНФАРКТЕ МИОКАРДА С ПОМОЩЬЮ ОДНОФОТОННОЙ ЭМИССИОННОЙ КОМПЬЮТЕРНОЙ ТОМОГРАФИИ

SUMMARY. On the basis of single photon emission computed tomography of the myocardium (SPECT) with Technetril 99mTc performed in 81 patients with myocardial infarction (MI), we confirmed the proportion of myocardial segments of the left ventricle (LV) with varying degrees of RP inclusion and, therefore, with varying degrees of perfusion impairment. In 75% of patients, reduction of hypoperfusion area in the remote period after myocardial infarction has been revealed compared to the acute period. The relation between slow ECG evolution with the severe impairment of left ventricular myocardial perfusion has been showed. The relation between the degree of impairment of LV myocardial perfusion (by SPECT) and its contraction (according to the two-dimensional echocardiogram) has been revealed. It is shown that one of the leading factors in the restoration of myocardial perfusion is the time of intracoronary intervention. РЕЗЮМЕ. На основании проведения у 81 больного инфарктом миокарда (ИМ) перфузионной однофотонной эмиссионной компьютерной томографии (ОФЭКТ) миокарда с 99mTc-технетрилом уточнено соотношение сегментов миокарда левого желудочка (ЛЖ) с разной степенью включения радиофармпрепарата и, следовательно, с разной степенью нарушения перфузии. У 75% пациентов установлено сокращение площади гипоперфузии в отдаленный период инфаркта по сравнению с острым. Продемонстрирована связь замедленной ЭКГ-эволюции ИМ с глубокими расстройствами перфузии миокарда ЛЖ. Выявлена взаимосвязь степени нарушения перфузии миокарда ЛЖ (по данным ОФЭКТ) и его сократимости (по данным двухмерной Эхо-КГ). Показано, что одним из ведущих факторов восстановления перфузии миокарда является время выполнения внутрико- ронарного вмешательства.