Variety of narrow-leaved lupine (<i>Lupinus angustifolius L.</i>) Mezenat

The purpose of the study was to create of an early ripening variety of narrow-leaved lupine with a seed and green mass yield above the standard, resistant to unfavorable biotic and abiotic environmental factors in the North-West region of the Russian Federation. As the result of many years of breeding, an early ripening variety of narrow-leaved lupine Metsenat has been developed. In a competitive varietal trial conducted in the conditions of the Leningrad Region, the seed yield of the variety Metsenat averaged 4.3 t/ha in 2015-2017 that was 1.1 t/ha higher than the standard (Kristall), the yield of green hay was 48.4 t/ha (13.9 t/ha higher than the standard). According to the results of the structural analysis of plants, the variety Metsenat was characterized by an increased number of seeds per plant (90.4 pcs.) and a good seeding of the beans (4.4 pcs.). It is a variety of universal use, with a low content of alkaloids (0.0072 %), it is technological, resistant to lodging (7 points), to cracking of beans and shedding of seeds on the vine, resistant to anthracnose (9 points). It is characterized by a rapid growth rate of plants in the initial period of vegetation. In 2018 the Metsenat variety was included into the State Register of Breeding Achievements of the Russian Federation approved for use in agricultural production in 12 regions (Patent No. 9559)

Investigation of oxidation process of mechanically activated ultrafine iron powders

The oxidation of mechanically activated ultrafine iron powders was studied using X-ray powder diffraction and thermogravimetric analyzes. The powders with average particles size of 100 nm were made by the electric explosion of wire, and were subjected to mechanical activation in planetary ball mill for 15 and 40 minutes. It was shown that a certain amount of FeO phase is formed during mechanical activation of ultrafine iron powders. According to thermogravimetric analysis, the oxidation process of non-milled ultrafine iron powders is a complex process and occurs in three stages. The preliminary mechanical activation of powders considerably changes the nature of the iron powders oxidation, leads to increasing in the temperature of oxidation onset and shifts the reaction to higher temperatures. For the milled powders, the oxidation is more simple process and occurs in a single step

Effect of ion-plasma treatment on oxidation-reduction processes in lithium-titanium-zinc ferrites

We examined the effect of nitrogen, oxygen and argon plasma on the diffusion-controlled oxidation-reduction processes in lithium-titanium-zinc ferrite ceramics by measuring the activation energy of electrical conductivity in the depth of the sample. The experimental results show that the high-temperature treatment in polycrystalline ferrites by nitrogen or argon ion plasma greatly accelerates the oxidation-reduction processes in ferrites and changes the process direction depending on the partial pressure of oxygen

TG study of the Li[0.4]Fe[2.4]Zn[0.2]O[4] ferrite synthesis

In this paper, the kinetic analysis of Li-Zn ferrite synthesis was studied using thermogravimetry (TG) method through the simultaneous application of non-linear regression to several measurements run at different heating rates (multivariate non-linear regression). Using TG-curves obtained for the four heating rates and Netzsch Thermokinetics software package, the kinetic models with minimal adjustable parameters were selected to quantitatively describe the reaction of Li-Zn ferrite synthesis. It was shown that the experimental TG-curves clearly suggest a two-step process for the ferrite synthesis and therefore a model-fitting kinetic analysis based on multivariate non-linear regressions was conducted. The complex reaction was described by a two-step reaction scheme consisting of sequential reaction steps. It is established that the best results were obtained using the Yander three-dimensional diffusion model at the first stage and Ginstling-Bronstein model at the second step. The kinetic parameters for lithium-zinc ferrite synthesis reaction were found and discussed

Signs and symptoms of endocrine organs. Diseases and metabolic disorders (accents on thyroid gland and pancreas).

Lecture in internal medicine propaedeutic

Signs and symptoms of the musculoskeletal and connective tissue system disorders

Lecture in internal medicine propaedeutic

Dependence of Aerobic Performance of Athletes on Polymorphism of Genes

The adaptation of an athlete to systematic physical exercise has been shown to be determined by a combination of great many genes. The aim of our study was to investigate the dependence of the aerobic capacity parameters in sport on the set of gene polymorphisms. Cardio-respiratory system (CRS) adaptation reactions to exercise of 72 endurance athletes were assessed using the gas analysis. The analysis of the obtained results has shown both single and combined effect of the gene polymorphisms on the aerobic capacity. The impact of 6 polymorphisms on the aerobic performance level was analyzed: Т&ndash;786&rarr;С polymorphism of the promoter of еNOS gene as well as АСЕ I/D polymorphism, Рго/Ala polymorphism of PPARG gene, G/C polymorphism of PPARA gene, Pro582Ser polymorphism of HIF1&alpha; gene, and Ala203Pro polymorphism of PPARGC1B. It was found that a single impact on the HRmax providing АСЕ I/D polymorphism. Individual influence of АСЕ gene accounts for 2% of this index dissipation. Results showed that there is a dependence between the amount the maximum volume of consumed oxygen (VO2max) from the set of gene polymorphisms. Cumulative impact of these polymorphisms in the combination with the individual parameters (gender; qualification; kind of sport) stipulates 71% of dispersion of VO2max value

Study of the process e+e-\to \mu+\mu- in the energy region \sqrt{s}=980, 1040 -- 1380 MeV

The cross section of the process e+e-\to\mu+\mu- was measured in the SND experiment at the VEPP-2M e+e- collider in the energy region \sqrt{s}=980, 1040 -- 1380 MeV. The event numbers of the process e+e-\to\mu+\mu- were normalized to the integrated luminosity measured using e+e-\to e+e- and e+e-\to\gamma\gamma processes. The ratio of the measured cross section to the theoretically predicted value is 1.006\pm 0.007 \pm 0.016 and 1.005 \pm 0.007 \pm 0.018 in the first and second case respectively. Using results of the measurements, the electromagnetic running coupling constant \alpha in the energy region \sqrt{s}=1040 -- 1380 MeV was obtained = 134.1\pm 0.5 \pm 1.2 and this is in agreement with theoretical expectation.Comment: 29 pages, 23 figure

Метод оценки отказов клеммно-болтовых промежуточных скреплений

[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The authors solve the problem of determination of operational risks relating to elements of a railway track under increasing over time changes in the track geometry due to weakening or breakdown of clip-bolt intermediate fastenings. To evaluate fastenings’ failures a method is offered based on the use of a parameter of rails’ displacement under train load. The parameter can be obtained by using automated diagnostic devices type KVL-P, ADK-I and «ERA» and similar to them. The article provides calculation of rail head displacement value, depending on the number of defective fastenings. The conditions for method’ s application are stipulated. Keywords: railway, railway track, operational risks, failures of rail clip- bolt fastenings, evaluation method.Авторами решается задача определения эксплуатационных рисков, касающихся элементов железнодорожного пути при нарастающих с течением времени изменениях геометрии рельсовой колеи из-за ослабления или поломок клеммно- болтовых промежуточных скреплений. Для оценки отказов скреплений предложен метод, основанный на использовании параметра отжатия рельсов под поездной нагрузкой. Параметр может быть получен с помощью автоматизированных диагностических средств типа КВЛ-П, АДКИ «ЭРА» и аналогичных им. В статье дается схема расчёта величины отжатия головки рельса в зависимости от количества дефектных скреплений. Оговорены условия применения метода