Results of experiments for the detection of lunar ionosphere carried out on the first moon's artificial satellite /Luna-10/

Lunik X experiments to detect lunar ionospher

Magnetic field and plasma inside and outside of the Martian magnetosphere

Simultaneous magnetic and plasma measurements, carried out by wide angle plasma detectors in the Mars environment, are compared in order to identify regions with significantly different physical properties. Magnetograms and ion spectra indicate changes in the magnetopause and magnetosphere of Mars that are associated with the dynamic pressure effect of the solar wind

Digital Twin Application in Teaching Students Majoring in Metallurgical Engineering

The article addresses the crucial issues of training engineering personnel with the use of digital twins. In particular, application of digital twins is highly relevant when it comes to training of metallurgical engineering students. At present, teaching of students majoring in metallurgy involving the use of casting aluminum alloys physical models has a number of restrictions such as a high cost of expandable material, safety regulations, the need to provide special access. In this context, the purpose of this article is to identify the advantages and disadvantages of the digital twin of mo dern technology for casting aluminum alloys for application in the educational process. The digital twin created at the Siberian Federal University is a digital analogue of modern industrial complexes used at metallurgical enterprises. The methodological support and a script provided testing of the digital twin on the master’s students studying in the educational program 22.04.02.07 “Theory and technology of foundry production of non-ferrous metals and alloys”, direction of training 22.04.02 Metallurgy. The educational functionality of the model consists in passing the scenarios in the training and examination modes, which enables to test theoretical knowledge, gain skills and consolidate the skills of students. The training mode includes the necessary sequence of actions for passing one of the scenarios. The exam mode monitors user’s actions with saving his history, on the basis of which a report with the final grade is formed. It is planned that as a result of using the digital twin of the semicontinuous casting of aluminum alloys in the educational process, graduates will develop general professional, professional mandatory and professional competencies

Клинико-эпидемиологическая характеристика гепатита А у детей в период подъема заболеваемости

Objective. Study of clinical and epidemiological characteristicsof hepatitis A in children.Materials and methods. The paper presents the epidemiological situation of this issue in the Krasnoyarsk Territory, as well as the results of clinical observations of 104 children with hepatitis A in age from 1 to 14 years.Results. It was found that at the present time is marked deterioration of the epidemiological situation of hepatitis A with involvement in the epidemiological process of young children. In this severe hepatitis A, often occurring with the phenomena of cholestasis, significantly more frequent among children aged 7–14 years. Despite the apparent beneficial for the infection at discharge on the part of school-age children has been a recovery with residual effects that require continued monitoring and corrective therapy appointment.Цель. Изучение клинико-эпидемиологической характеристики гепатита А (ГА) у детей.Материалы и методы. Представлена эпидемиологическая ситуация по данной проблеме в Красноярском крае, а также результаты клинического наблюдения за 104 детьми с ГА в возрасте от 1 до 14 лет.Результаты. Установлено, что в настоящее время отмечено ухудшение эпидемиологической ситуации по ГА с вовлечением в эпидемиологический процесс детей раннего возраста. При этом тяжелые формы ГА, зачастую протекающие с явлениями холестаза, достоверно чаще встречаются у детей 7–14 лет. Несмотря на кажущееся благоприятное течение данной инфекции, при выписке у части детей школьного возраста имело место выздоровление с остаточными явлениями, что требовало продолжения наблюдения и назначения корригирующей терапии

Research of rolling regimes and mechanical properties of cold-rolled, annealed and welded semi-finished products from experimental alloys of Al-Mg system, economically alloyed by scandium

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.Our paper shows the research results of thermodeformation machining of flat ingots made of experimental aluminium alloys, containing magnesium, scandium, rare-earth and transition metals. Relevance of the work aimed at creating the new Al-Mg system alloys, alloyed by scandium, and technologies for obtaining deformed semi-finished products from them using metal forming operations are shown. Regimes of hot and cold sheet rolling for obtaining strips with thickness 1-3 mm from these alloys were calculated and experimentally tested. Experimental research included the following steps: preparation of flat slabs with dimensions 28-150-300 mm for rolling; hot rolling at the temperature of 450 °C with total draw ratio about 6; cold rolling with total draw ratio about 5; annealing of cold-deformed semi-finished products at the temperature of 350 °C within 3 hours; argon-arc welding of the obtained strips along and across the direction of deformation; intergranular corrosion test; evaluation of mechanical properties of the samples. As a result, the nature and degree of corrosion destruction were studied and mechanical properties of deformed, annealed and welded semi-finished products from experimental alloys were determined. It is established that they have a high level of strength and plastic properties of the metal along, across and at an angle 45o relative to the direction of rolling. So tensile strength reaches the value 500-520 MPa for deformed samples, yield strength of metal 435-470 MPa, relative elongation 4.8-6.7%, and for annealed samples the values of the relative elongation increase and can reach 14.0-14.5% at the sufficiently high yield strength 357-369 MPa. Tests for intergranular corrosion of samples after welding showed high corrosion resistance of welded joints. The strength of the welded seam is 0.75-0.85 of the strength of the base metal. The results of research can be recommended for the development of technology for the manufacture of parts from flat products, including welded joints

Thermoinactivation of Coupled Enzyme System of Luminous Bacteria NADH:FMN-Oxidoreductase-Luciferase in Gelatin

Исследовано влияние желатинового раствора и геля на биолюминесценцию биферментной системы светящихся бактерий NADH:FMN-оксидоредуктаза-люцифераза, изучены термостабильность и температурная инактивация биферментной системы в желатиновом окружении. Активность биферментной системы и кинетика её термоинактивации в желатине низкой концентрации, недостаточной для формирования геля, и в желатине высокой концентрации, способной к образованию геля, различаются. Установлено, что термоинактивация биферментной системы имеет нелинейный характер и происходит по диссоциативному механизму. Гелевая матрица желатина оказывает на ферменты стабилизирующее действие. Помещение ферментов в вязкую среду, созданную гелевым окружением желатина, не влияет на скорость ферментативных реакций.Influence of gelatin solution and gel on bioluminescence of coupled enzymatic system of luminous bacteria NADH:FMN-oxidoreductase-luciferase was analyzed, thermostability and thermoinactivation of coupled enzyme system in gelatinous environment were studied. Activity of coupled enzyme system and kinetics of its thermoinactivation in gelatin with low concentration, that is insufficient for gel formation, and in gelatin with high concentration, that is sufficient for gel formation, was different. It was determined that thermoinactivation of coupled enzyme system has nonlinear nature and occurs with dissociative mechanism. It was showed that gel matrix of gelatin stabilizes enzymes. There was no effect of viscous environment originating by gelatin surroundings on the rate of enzymatic reactions

Thermoinactivation of Coupled Enzyme System of Luminous Bacteria NADH:FMN-Oxidoreductase-Luciferase in Gelatin

Исследовано влияние желатинового раствора и геля на биолюминесценцию биферментной системы светящихся бактерий NADH:FMN-оксидоредуктаза-люцифераза, изучены термостабильность и температурная инактивация биферментной системы в желатиновом окружении. Активность биферментной системы и кинетика её термоинактивации в желатине низкой концентрации, недостаточной для формирования геля, и в желатине высокой концентрации, способной к образованию геля, различаются. Установлено, что термоинактивация биферментной системы имеет нелинейный характер и происходит по диссоциативному механизму. Гелевая матрица желатина оказывает на ферменты стабилизирующее действие. Помещение ферментов в вязкую среду, созданную гелевым окружением желатина, не влияет на скорость ферментативных реакций.Influence of gelatin solution and gel on bioluminescence of coupled enzymatic system of luminous bacteria NADH:FMN-oxidoreductase-luciferase was analyzed, thermostability and thermoinactivation of coupled enzyme system in gelatinous environment were studied. Activity of coupled enzyme system and kinetics of its thermoinactivation in gelatin with low concentration, that is insufficient for gel formation, and in gelatin with high concentration, that is sufficient for gel formation, was different. It was determined that thermoinactivation of coupled enzyme system has nonlinear nature and occurs with dissociative mechanism. It was showed that gel matrix of gelatin stabilizes enzymes. There was no effect of viscous environment originating by gelatin surroundings on the rate of enzymatic reactions

Clinical and epidemiological characteristics of hepatitis A in children during rise of morbidity

Objective. Study of clinical and epidemiological characteristicsof hepatitis A in children.Materials and methods. The paper presents the epidemiological situation of this issue in the Krasnoyarsk Territory, as well as the results of clinical observations of 104 children with hepatitis A in age from 1 to 14 years.Results. It was found that at the present time is marked deterioration of the epidemiological situation of hepatitis A with involvement in the epidemiological process of young children. In this severe hepatitis A, often occurring with the phenomena of cholestasis, significantly more frequent among children aged 7–14 years. Despite the apparent beneficial for the infection at discharge on the part of school-age children has been a recovery with residual effects that require continued monitoring and corrective therapy appointment