H⁻ injector for Moscow meson factory linac

Status report is presented for an H⁻ injector being now under construction. The injector parameters are as follows: energy − 400 keV; average beam current − 400 µA; beam pulse duration − up to 200 µs; pulse repetition rate − 50 Hz. A pulsed high-voltage generator and a surface-plasma ion source power supply have been developed and manufactured.Представлено состоянии работ по созданию инжектора отрицательных ионов водорода с энергией 400 кВ, который должен обеспечить средний ток пучка ионов до 400 мкА при длительности импульса тока до 200 мкс и частоте повторения импульсов 50 Гц. Разработаны, изготовлены и смонтированы генератор ускоряющего импульсного напряжения и система питания поверхностно-плазменного ионного источника.Представлено звіт про стан робіт зі створення інжектора негативних іонів водню з енергією 400 кВ, що повинен забезпечити середній струм пучка іонів до 400 мкА при тривалості імпульсу струму пучка до 200 мкс і частоті повторення імпульсів 50 Гц. Розроблено, виготовлені і змонтовані генератор прискорювальної імпульсної напруги і система живлення поверхнево-плазмового іонного джерел

COVID-19, септический шок и синдром диссеминированного внутрисосудистого свертывания крови. Часть 2

The article discusses the issues of hemostatic system disorders in patients with COVID-19. Strengthening the coagulopathy characteristic of DIC-syndrome, is a key sign of deterioration and an unfavorable prognosis in COVID-19 patients. Data obtained by Chinese colleagues demonstrates that a significantly increased level of D-dimer is one of the predictors of death. The article also highlights the preliminary recommendations of the International society of Thrombosis and Hemostasis (ISTH, 2020) to identify markers such as D-dimer, prothrombin time and platelet count as significant predictive markers in severe COVID-19 patients. The necessity of anticoagulant therapy in hospitalized patients is justified. The article discusses the features of sepsis in pregnant women. Data from a meta-analysis of 19 studies evaluating pregnancy complications and outcomes in patients with various coronavirus infections are presented. Despite the complicated course of pregnancy, there were no cases of vertical transmission of viral infection. In the pathogenesis of severe COVID-19 complications with the formation of severe acute respiratory distress syndrome, multi-organ dysfunction, super inflammation and cytokine storm play a leading role. In connection with viral sepsis, the article discusses the role of hemophagocytic lymphohistiocytosis as a hyperinflammatory syndrome characterized by fulminant and fatal hypercytokinemia with multiple organ failure, the role of hyperferritinemia in predicting the outcomes of severe sepsis. Groups of patients at high risk of death are discussed, as well as the need for anticoagulant and anti-cytokine therapy in patients with COVID-19.В статье рассматриваются вопросы нарушения системы гемостаза у пациентов с COVID-19. Нарастание коагулопатии, характерной для диссеминированного внутрисосудистого свертывания крови (ДВС-синдрома), ― ключевой признак ухудшения состояния и неблагоприятного прогноза у пациентов с COVID-19. Приводятся данные, полученные китайскими коллегами, согласно которым значительно повышенный уровень D-димера является одним из предикторов смерти. Также освещены предварительные рекомендации Международного общества тромбоза и гемостаза (International Society on Thrombosis and Haemostasis, ISTH, 2020) по определению таких маркеров, как D-димер, протромбиновое время и количество тромбоцитов, в качестве значимых прогностических маркеров у тяжелых больных COVID-19. Обосновывается необходимость антикоагулянтной терапии у госпитализированных больных. В статье обсуждаются особенности сепсиса у беременных. Приводятся данные метаанализа 19 исследований, посвященных оценке осложнений и исходов беременности у пациенток с различными коронавирусными инфекциями. Несмотря на осложненное течение беременности, не отмечено ни одного случая вертикальной передачи вирусной инфекции. В патогенезе тяжелых осложнений COVID-19 с формированием тяжелого острого респираторного дистресс-синдрома, полиорганной дисфункции ведущую роль играют супервоспаление и цитокиновый шторм. В статье в связи с вирусным сепсисом обсуждается роль гемофагоцитарного лимфогистиоцитоза как гипервоспалительного синдрома, характеризуемого фульминантной и фатальной гиперцитокинемией с полиорганной недостаточностью, роль гиперферритинемии в прогнозировании исходов тяжелого сепсиса. Обсуждаются группы пациентов высокого риска развития летальных исходов, а также необходимость антикоагулянтной и антицитокиновой терапии у больных COVID-19

Information letter of the Russian Society of Obstetricians and Gynecologists

Information letter of the Russian Society of Obstetricians and Gynecologists V.N. Serov Russian Society of Obstetricians and Gynecologists, Moscow, Russian Federation Adequate intake of micronutrients by a pregnant woman, or a woman planning a pregnancy, is essential for the normal course of pregnancy and fetal development. According to the State Research Institute of Nutrition of the Russian Academy of Medical Sciences, the examination of women in Russia revealed that 70–80% of them suffer from polyhypovitaminosis, regardless of age, season, place of residence and professional occupation. Many authors in modern Russian international studies provide data on the adverse effects of micronutrient deficiency in pregnant women. In this publication, the consequences of vitamin and mineral deficiency during pregnancy and the ways of their replenishment are analyzed in detail. Data on the effectiveness of vitamin mineral complexes (VMC) in reducing the risk of complications of pregnancy, malformations of the fetus and adverse long-term consequences for the health of the child are presented. Additional intake of VMC is also essential during the lactation period, providing full breastfeeding and normal development of the baby in the first year of life. Among the VMCs, presented on the Russian market, the “Elevit” complexes are worth mentioning, because they contain the optimal amount of vitamins to meet the physiological needs of Russian women. Keywords: polyhypovitaminosis, pregnancy, breastfeeding, congenital malformations, anemia, metafolin, vitamin mineral complex. For citation: Serov V.N. Information letter of the Russian Society of Obstetricians and Gynecologists. Russian Journal of Woman and Child Health. 2019;2(2):84–88.<br

Energy Liberation in the Flow of Fluid inside the Circular Couette System with Opposed Rotation of Cylinders

The paper presents the design of a heat generator intended for efficient conversion of kinetic wind energy into thermal energy. The design is based on the circulation of the viscous working liquid in the system of cylindrical ring channels, which are formed by the “rotors” rotating opposite (towards) to each other. The results of experiments on measuring the heat capacity of heat generators in different operational modes are presented. The analysis of the obtained results is carried out

Alumina nanofibrous structural self-organization in hollow nanotubes caused by hydrogen treatment

The dependence of high-temperature hydrogen activation on the structure of nanofibrous alumina (filament diameter of 5 nm) was shown. Due to self-organization, nanofibers are twisted in spirals and then in a second stage the spirals interlock and form alumina tubes, which then transform into bundles. In the process of hydrogen activation, the specific surface area changes and amorphous alumina nanowires develop into a nanocrystalline phase. TEM investigations showed that high-temperature hydrogen activation led to the self-organization of the alumina nanofibrous structure into hollow nanotubes with a diameter close to 30 nm. © 2014 Pleiades Publishing, Ltd

Alumina nanofibrous structural self-organization in hollow nanotubes caused by hydrogen treatment

The dependence of high-temperature hydrogen activation on the structure of nanofibrous alumina (filament diameter of 5 nm) was shown. Due to self-organization, nanofibers are twisted in spirals and then in a second stage the spirals interlock and form alumina tubes, which then transform into bundles. In the process of hydrogen activation, the specific surface area changes and amorphous alumina nanowires develop into a nanocrystalline phase. TEM investigations showed that high-temperature hydrogen activation led to the self-organization of the alumina nanofibrous structure into hollow nanotubes with a diameter close to 30 nm. © 2014 Pleiades Publishing, Ltd

Conversion propane in the presence of (La, Sm, Eu) vanadite and (La, Sm, Eu) vanadate

The aim of this work was to investigate features of propane conversion in the presence of samarium, lanthanum, europium vanadate and samarium, lanthanum, europium vanadite. The conversion of propane was studied in the presence of samarium, lanthanum, europium vanadate and samarium, lanthanum, europium vanadite synthesized by solid-phase method. MeVO4 (Me=La, Sm, Eu) crystallized in the zircon structural type, while MeVO3 (Me=La, Sm, Eu) had a perovskite-like structure It was shown that MeVO3 (Me=La, Sm, Eu) catalyzes mainly the process of propane cracking to form methane and ethylene, and MeVO4 (Me=La, Sm, Eu) equally accelerates both cracking and the dehydrogenation of propane. © 2018 TANGER Ltd. All Rights Reserved