Plasma spray coating with iron oxides for manufacturing of the corrosion-resistant electrodes

© 2018 Institute of Physics Publishing. All rights reserved. Magnetite anodes were manufactured by plasma spray coating of titanium with the iron oxide powder. The powder was obtained by plasma-electrolytic atomization of carbon steel. Porosity, adhesion, specific resistivity of these coatings were measured in relation to size distribution and chemical composition of the powder used for spray coating

Sorption concentration of arsenic ions by magnetite

© The author(s). This paper is focused on the possibility of using magnetite powders obtained by chemical and plasma-chemical method for sorption concentration of arsenic ions. Processes of arsenic concentration by two-site sorption in magnetite-water system have been studied, and the optimal conditions for concentration have been defined. In static mode, effects of pH, temperature and contact time on the adsorption process have been studied. As a result, a method for pre-sorption concentration has been proposed, allowing reducing the lower limit of the atomic absorption determination of arsenic content

Architecting the IoT Paradigm: A Middleware for Autonomous Distributed Sensor Networks

Actualizing Internet of Things undoubtedly constitutes a major challenge of modern computing and is a promising next step in realizing the unification of all seamlessly interacting entities, either human users or participating machines, under a shared, coherent architecture. While it has now become common belief that the related solutions should be based on compatible network infrastructure employing widely accepted communication schemes, the specifics of the intermediate system that would act as global interface for all involved “things” are yet to be determined. A rising trend to define such machine-based entities is through cyber-physical systems, in terms of collaborating elements with physical input and output. Certainly, sensor networks constitute the most representative realization of such systems. Taking these issues and opportunities under consideration, this work proposes a bioinspired distributed architecture for an Internet of Things that exhibits self-organization properties to enable efficient interaction between entities modeled as cyber-physical systems, mainly focusing on sensor networks. Furthermore, a middleware has been implemented according to the proposed architecture, which serves the role of the backbone of this network as a multiagent and autonomous distributed system. The evaluation results demonstrate the self-optimization properties of the introduced scheme and indicate global network convergence

The ART-XC telescope on board the SRG observatory

ART-XC (Astronomical Roentgen Telescope - X-ray Concentrator) is the hard X-ray instrument with grazing incidence imaging optics on board the Spektr-Roentgen-Gamma (SRG) observatory. The SRG observatory is the flagship astrophysical mission of the Russian Federal Space Program, which was successively launched into orbit around the second Lagrangian point (L2) of the Earth-Sun system with a Proton rocket from the Baikonur cosmodrome on 13 July 2019. The ART-XC telescope will provide the first ever true imaging all-sky survey performed with grazing incidence optics in the 4-30 keV energy band and will obtain the deepest and sharpest map of the sky in the energy range of 4-12 keV. Observations performed during the early calibration and performance verification phase as well as during the on-going all-sky survey that started on 12 Dec. 2019 have demonstrated that the in-flight characteristics of the ART-XC telescope are very close to expectations based on the results of ground calibrations. Upon completion of its 4-year all-sky survey, ART-XC is expected to detect ~5000 sources (~3000 active galactic nuclei, including heavily obscured ones, several hundred clusters of galaxies, ~1000 cataclysmic variables and other Galactic sources), and to provide a high-quality map of the Galactic background emission in the 4-12 keV energy band. ART-XC is also well suited for discovering transient X-ray sources. In this paper, we describe the telescope, results of its ground calibrations, major aspects of the mission, the in-flight performance of ART-XC and first scientific results.Comment: 19 pages, 30 figures, accepted for publication in Astronomy and Astrophysic

Результаты многоцентрового исследования: эффективность и безопасность препарата инозина глицил-цистеинилглутамат динатрия в терапии острых отравлений этанолом

Abstract The article presents results of a multicenter, randomized, double-blind, placebo-controlled clinical trial on the efficacy and safety of inosine glycylcysteinyl-glutamate disodium (Molixan®) in the treatment of acute severe ethanol poisoning.The aim of the study To evaluate the efficacy and safety of inosine glycyl-cysteinyl-glutamate disodium in a new dosage regimen in the treatment of severe ethanol poisoning.Material and Methods The material of the study is the data of 133 patients with severe ethanol poisoning. Inclusion criteria: age from 18 to 60 years, 1–2 coma stage (Glasgow-Pittsburgh coma scale of 14–27), ethanol in the blood of more than 2.5%. The patients were randomized into 2 groups: the Study Drug group (SD group) — 67 patients who, in addition to the standard therapy, were injected with the study drug - inosine glycyl-cysteinyl-glutamate disodium in a dose of 3.0 mg/kg; and the Placebo group — 66 patients who, in addition to the standard therapy, were injected with 0.9% sodium chloride solution in a dose of 3.0 mg/kg. Comparative intergroup and intragroup analyses were carried out according to the main clinical, laboratory parameters and EEG monitoring data.Results The study showed a positive effect of the study drug — a reduction in the coma period was noted (from 137 (75; 180) minutes to 78 (50; 155) minutes (p<0.001)), higher values of the Glasgow-Pittsburgh scale were recorded after 3 and 6 hours from the start of the therapy (p<0.01), a reduction in the time of formation of EEG awakening patterns in patients with delta coma activity from 192.2 (161.9; 222.5) minutes to 112.5 (97.6; 127.6) minutes (p<0.001), a decrease in heart rate (p<0.02), a decrease in the number of complaints of weakness and dizziness (p<0.005), in patients with high ALT levels, the frequency of development and severity of tremor decreased (p<0.01). The hepatoprotective effect of the drug was revealed, it was manifested by a decrease in ALT (p<0.001), AST (p<0.001) and direct bilirubin (p<0.03); the effect of the drug on metabolic processes — a decrease in lactate (p<0.02), an increase in BE-ECF (p<0.01), glucose (p<0.01) 3 hours after drug administration, an increase in potassium after 24 hours (p<0.03). The analysis of safety data did not reveal statistically significant differences between the treatment groups, no serious adverse events were recorded.Conclusion The study demonstrated the efficacy and safety of inosine glycyl-cysteinyl-glutamate disodium (Molixan®) in the treatment of severe ethanol poisoning in a single dose of 3.0 mg/kg administered intravenouslyРезюме В статье представлены результаты многоцентрового, рандомизированного, двойного слепого, плацебо-контролируемого клинического исследования эффективности и безопасности препарата инозина глицил-цистеинил-глутамат динатрия (Моликсан®) в терапии острых тяжелых отравлений этанолом.Цель исследования Оценка эффективности и безопасности применения препарата инозина глицил-цистеинил-глутамат динатрия в новом режиме дозировании в терапии тяжелых отравлений этанолом.Материал и методы Материал исследования — данные 133 пациентов с тяжелым отравлением этанолом. Критерии включения: возраст от 18 до 60 лет, кома 1–2-й ст. (14–27 баллов по шкале комы Глазго–Питтсбург — ШКГП), содержание этанола в крови более 2,5‰. Пациенты рандомизированы на две группы: группа «Исследуемый препарат» (группа «ИП») — 67 пациентов, которым дополнительно к стандартной терапии вводили исследуемый препарат — инозина глицил-цистеинил-глутамат динатрия в дозе 3,0 мг/кг; группа «Плацебо» — 66 пациентов, которым дополнительно к стандартной терапии вводили 0,9% раствор натрия хлорида в дозе 3,0 мг/кг. Сравнительный межгрупповой и внутригрупповой анализ проводили по основным клиническим, лабораторным показателям и данным электроэнцефалографического (ЭЭГ-) мониторинга.Результаты Исследование показало положительное влияние исследуемого препарата — отмечено статистически значимое сокращение периода комы с 137 (75;180) до 78 (50;155) минут (р<0,001), зафиксированы статистически значимые более высокие значения ШКГП через 3 и 6 часов от начала терапии (р<0,01), сокращение времени формирования ЭЭГ-паттернов пробуждения у пациентов с «дельта-комой» с 192,2 (161,9; 222,5) до 112,5 (97,6; 127,6) минут (p<0,001); снижение частоты сердечных сокращений (р<0,02), снижение количества жалоб на слабость и головокружение (р<0,005), у пациентов с высоким уровнем в крови аланинаминотрансферазы (АлТ) снизилась частота развития и выраженность тремора (р<0,01). Выявлено статистически значимое гепатопротекторное действие препарата, которое проявилось снижением уровня АлТ (р<0,001), аспартатаминотрансферазы (р<0,001) и прямого билирубина (р<0,03); влиянием препарата на метаболические процессы — снижение уровня в крови лактата (р<0,02), повышение BE-ECF (р<0,01), уровня в крови глюкозы (р<0,01) через 3 часа после введения препарата и калия через 24 часа (р<0,03). Анализ данных безопасности не выявил статистически значимых различий между группами лечения, серьезных нежелательных явлений не зафиксировано.Заключение Исследование показало эффективность и безопасность применения препарата инозина глицил-цистеинил-глутамат динатрия (Моликсан®) при тяжелых отравлениях этанолом в дозировке 3,0 мг/кг внутривенно, однократно

THE METHODOLOGY FOR CALCULATING OF LABOR COSTS OF MEDICAL PERSONNEL IN MARKET CONDITIONS

The article presents the approximate calculations of working time of physician to work with the patient and documentation. On the base of these calculations they outline the possible ways to optimize the work of the medical staff

Plasma spray coating with iron oxides for manufacturing of the corrosion-resistant electrodes

© 2018 Institute of Physics Publishing. All rights reserved. Magnetite anodes were manufactured by plasma spray coating of titanium with the iron oxide powder. The powder was obtained by plasma-electrolytic atomization of carbon steel. Porosity, adhesion, specific resistivity of these coatings were measured in relation to size distribution and chemical composition of the powder used for spray coating

Sorption concentration of arsenic ions by magnetite

© The author(s). This paper is focused on the possibility of using magnetite powders obtained by chemical and plasma-chemical method for sorption concentration of arsenic ions. Processes of arsenic concentration by two-site sorption in magnetite-water system have been studied, and the optimal conditions for concentration have been defined. In static mode, effects of pH, temperature and contact time on the adsorption process have been studied. As a result, a method for pre-sorption concentration has been proposed, allowing reducing the lower limit of the atomic absorption determination of arsenic content

Sorption concentration of arsenic ions by magnetite

© The author(s). This paper is focused on the possibility of using magnetite powders obtained by chemical and plasma-chemical method for sorption concentration of arsenic ions. Processes of arsenic concentration by two-site sorption in magnetite-water system have been studied, and the optimal conditions for concentration have been defined. In static mode, effects of pH, temperature and contact time on the adsorption process have been studied. As a result, a method for pre-sorption concentration has been proposed, allowing reducing the lower limit of the atomic absorption determination of arsenic content

Sorption concentration of arsenic ions by magnetite

© The author(s). This paper is focused on the possibility of using magnetite powders obtained by chemical and plasma-chemical method for sorption concentration of arsenic ions. Processes of arsenic concentration by two-site sorption in magnetite-water system have been studied, and the optimal conditions for concentration have been defined. In static mode, effects of pH, temperature and contact time on the adsorption process have been studied. As a result, a method for pre-sorption concentration has been proposed, allowing reducing the lower limit of the atomic absorption determination of arsenic content