81 research outputs found

    The Lyric Subject in Modern Russian Poetry: Problems and Perspectives of Research

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    В статье представлены рецензии на два издания, в которых исследуется субъектная сфера современной русской поэзии.The review deals with two books united by the common theme - investigation of the subject sphere of contemporary Russian poetry. The collective monograph and the special issue of the “Russian prise articles of Russian and foreign scholars - participants of the joint project of V. V. Vinogradov Russian Language Institute and the Institute of Linguistics of the Russian Academy of Sciences and Trier University (Germany).The authors analyze the theoretical approaches to studying subject structures of the lyric text represented in the papers of H. Stahle and W. Weststeijn and explore the research algorithms of the “split subject” and the description of the methods of “dispersing and reassembling” the lyric subject and the features of its deictic representation

    ДЕГИДРИРОВАНИЕ ЭТАНОЛА В АЦЕТАЛЬДЕГИД В ПРИСУТСТВИИ МЕДНЫХ НАНЕСЕННЫХ КАТАЛИЗАТОРОВ НА ОСНОВЕ УГЛЕРОДНЫХ МАТЕРИАЛОВ

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    The process of ethanol dehydrogenation to acetaldehyde upon different copper supported on carbon catalysts has been studied. Different carbon materials – activated carbon Norit, carbon-carbon composite sibunit and activated carbon fibers (ACF) – were used as a support for the catalyst. The BET surface area as well as the porous structure of the materials were determined with the use of N2 adsorption-desorption technique. The catalysts prepared by wetness impregnation contained 5% of Cu. The effect of the carrier texture on the distribution of active metal has been shown using scanning electron microscopy. Copper deposited on ACF was well distributed in comparison with the other supports studied and had an average particle size of 20 nm. This led to higher activity of the 5% Cu/ACF catalyst. Besides, it appeared more selective in the process of dehydrogenation.Исследован процесс дегидрирования этилового спирта в присутствии медьсодержащих каталитических систем на основе различных углеродных материалов. Показано влияние структуры носителя на распределение активного компонента

    Влияние предварительного окисления углеродного носителя на активность нанесенного медьсодержащего катализатора дегидрирования этанола

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    Copper supported catalysts based on preliminary oxidized carbon fibers have been studied. Nitric acid and hydrogen peroxide have been used for prior oxidation treatment of the supports. To characterize this materials N<sub>2</sub> adsorption-desorption and titration technics were used. Compared to nonoxidized activated carbon fibers, no significant changes in the texture of the modified supports were found, while there were differences in surface functionalities. Cupper supported catalysts were prepared by wetness impregnation and characterized by TPR, SEM. The influence of different surface functional groups on the distribution of active metal has been discussed. Besides, the catalysts were tested in the process of ethanol dehydrogenation. Cupper supported on activated carbon fibers preliminary oxidized with HNO<sub>3</sub> appeared to be more active in the process, although less stable at high temperatures. The reasons of the loss of activity have been also discussed.Исследованы медные катализаторы на основе активированных углеродных волокон, при-меняемые в процессе дегидрирования этанола. Показано влияние предварительной окислительной обработки (азотной кислотой или перекисью водорода) носителя на свойства каталитических систем

    The OpenMolcas Web: A Community-Driven Approach to Advancing Computational Chemistry

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    The developments of the open-source OpenMolcas chemistry software environment since spring 2020 are described, with a focus on novel functionalities accessible in the stable branch of the package or via interfaces with other packages. These developments span a wide range of topics in computational chemistry and are presented in thematic sections: electronic structure theory, electronic spectroscopy simulations, analytic gradients and molecular structure optimizations, ab initio molecular dynamics, and other new features. This report offers an overview of the chemical phenomena and processes OpenMolcas can address, while showing that OpenMolcas is an attractive platform for state-of-the-art atomistic computer simulations

    Improved functionalization of oleic acid-coated iron oxide nanoparticles for biomedical applications

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    Superparamagnetic iron oxide nanoparticles can providemultiple benefits for biomedical applications in aqueous environments such asmagnetic separation or magnetic resonance imaging. To increase the colloidal stability and allow subsequent reactions, the introduction of hydrophilic functional groups onto the particles’ surface is essential. During this process, the original coating is exchanged by preferably covalently bonded ligands such as trialkoxysilanes. The duration of the silane exchange reaction, which commonly takes more than 24 h, is an important drawback for this approach. In this paper, we present a novel method, which introduces ultrasonication as an energy source to dramatically accelerate this process, resulting in high-quality waterdispersible nanoparticles around 10 nmin size. To prove the generic character, different functional groups were introduced on the surface including polyethylene glycol chains, carboxylic acid, amine, and thiol groups. Their colloidal stability in various aqueous buffer solutions as well as human plasma and serum was investigated to allow implementation in biomedical and sensing applications.status: publishe

    Опыт лечения гангрены Фурнье, осложненной развитием перитонита

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    Fournier’s gangrene (FG) is a rare but rather formidable disease that has been occurring more and more often in surgical hospitals of the country in the last decade. Such situation, in our opinion, is explained by an increase in the number of immunocompromised patients. A number of concomitant diseases is a predisposing factor for the development of FG: diabetes mellitus, obesity, cirrhosis, malignant tumors, alcoholism, drug addiction, glucocorticoids, condition after chemotherapy, nutritional deficiency. The course of the disease is accompanied by a high mortality rate – up to 88.0 %, and among the surviving patients, about 30.0 % need constant care after discharge from the hospital and more than 50.0 % – in repeated reconstructive and plastic surgeries on the genitals and perineum. Annually in our clinic, up to 5–6 people are hospitalized with this diagnosis. In this article, we present a rare clinical observation of the treatment a patient with FG, complicated by the development of peritonitis with a favorable outcome.Гангрена Фурнье (ГФ) – редкое, но довольно грозное заболевание, которое в последнее десятилетие встречается в хирургических стационарах страны все чаще. Такая ситуация, на наш взгляд, объясняется увеличением количества иммунокомпрометированных пациентов. Ряд сопутствующих заболеваний является предрасполагающим фактором для развития ГФ: сахарный диабет, ожирение, цирроз печени, злокачественные опухоли, алкоголизм, наркомания, прием глюкокортикостероидов, состояние после химиотерапии, алиментарная недостаточность. Течение заболевания сопровождается высокой летальностью – до 88,0 %, а среди выживших пациентов около 30,0 % нуждаются в постоянном уходе после выписки из стационара и более 50,0 % – в повторных реконструктивных и пластических операциях на наружных гениталиях и промежности. Ежегодно в нашу клинику госпитализируется до 5–6 человек с данным диагнозом. В этой статье мы приводим редкое клиническое наблюдение лечения пациента с ГФ, осложнившейся развитием перитонита, с благоприятным исходом.Конфликт интересов. Авторы заявляют об отсутствии конфликта интересов.Финансирование. Исследование не имело спонсорской поддержки

    Effects of alirocumab on types of myocardial infarction: insights from the ODYSSEY OUTCOMES trial

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    Aims  The third Universal Definition of Myocardial Infarction (MI) Task Force classified MIs into five types: Type 1, spontaneous; Type 2, related to oxygen supply/demand imbalance; Type 3, fatal without ascertainment of cardiac biomarkers; Type 4, related to percutaneous coronary intervention; and Type 5, related to coronary artery bypass surgery. Low-density lipoprotein cholesterol (LDL-C) reduction with statins and proprotein convertase subtilisin–kexin Type 9 (PCSK9) inhibitors reduces risk of MI, but less is known about effects on types of MI. ODYSSEY OUTCOMES compared the PCSK9 inhibitor alirocumab with placebo in 18 924 patients with recent acute coronary syndrome (ACS) and elevated LDL-C (≥1.8 mmol/L) despite intensive statin therapy. In a pre-specified analysis, we assessed the effects of alirocumab on types of MI. Methods and results  Median follow-up was 2.8 years. Myocardial infarction types were prospectively adjudicated and classified. Of 1860 total MIs, 1223 (65.8%) were adjudicated as Type 1, 386 (20.8%) as Type 2, and 244 (13.1%) as Type 4. Few events were Type 3 (n = 2) or Type 5 (n = 5). Alirocumab reduced first MIs [hazard ratio (HR) 0.85, 95% confidence interval (CI) 0.77–0.95; P = 0.003], with reductions in both Type 1 (HR 0.87, 95% CI 0.77–0.99; P = 0.032) and Type 2 (0.77, 0.61–0.97; P = 0.025), but not Type 4 MI. Conclusion  After ACS, alirocumab added to intensive statin therapy favourably impacted on Type 1 and 2 MIs. The data indicate for the first time that a lipid-lowering therapy can attenuate the risk of Type 2 MI. Low-density lipoprotein cholesterol reduction below levels achievable with statins is an effective preventive strategy for both MI types.For complete list of authors see http://dx.doi.org/10.1093/eurheartj/ehz299</p
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