PSA-stage Features of the Hybrid Membrane-sorption Oxygen Concentrator

The paper considers the principle of the organization of the hybrid membranesorption oxygen concentrator and the work of the PSA stage of the hybrid system. The use of hybrid membrane-sorption gas separation systems can significantly reduce the energy consumption of plants, as well as to neutralize such disadvantages as contamination of the product flow by the products of abrasion of sorbents, through the use of highly selective polymer membrane, and the restriction on the oxygen concentration when using a single membrane stage, through its use after the PSA stage. In this paper, we propose an arrangement for the operation of the PSA stage of a hybrid system consisting of three adsorbers and providing a constant product flow of the PSA stage necessary to ensure continuous feed flow to the membrane stage of the system. Each of the adsorbers in this system passes through three main stages: filling, displacement (adsorption), and discharge (desorption). Moreover, the filling is not from the compressor, but part of the product flow of the displaced adsorber. The results of the operation of the system organized by the proposed method are compared with the results of the operation of modern gas separation systems on the market.     Keywords: Sorption, air separation, pressure-swing adsorption, PSA, hybrid technologies, oxygen concentrator, recycling, oxyge

Prerequisites, International Context and Features of NATO’s Proxy War against Russia in Ukraine (2022–2023)

The purpose of the article is to clarify the prerequisites, international context, and features of the armed conflict in Ukraine, which in the conditions of a Special Military Operation (SVO) has acquired the character of a protracted and exhausting proxy war between Russia and NATO countries. By now, Russian social scientists have generally developed an adequate understanding of the causes of the war and the goals of the warring parties. Their methodological position is clear and is mainly determined by political attitudes that have been repeatedly voiced by the President of the Russian Federation, the Head of the Russian Foreign Ministry, other senior officials, and representatives of interested departments. As a rule, this does not raise questions since the official Russian position is not actually imbued with ideology. At the same time, the publications of Western political scientists, experts, and journalists, especially those who adhere to the realistic paradigm, deserve attention. Their assessments and forecasts contribute to the formation of an objective picture of the Ukrainian crisis. During the study, it was found that the intentions of the NATO countries led by the United States, and, therefore, the background of their rivalry with Russia, have not changed during the SVO. They still expect to inflict a strategic defeat on our country and thereby prolong the existence of a unipolar world. Believing in Russia’s weakness, Western elites associate the end of the conflict with the victory of the Kiev regime on the battlefield. Therefore, the United States and its NATO allies continue to saturate Ukraine with more and more modern weapons. The main sponsor and organizer of the ongoing war is the United States, which pays two-thirds of Ukrainian military expenses. At the same time, their behavior is characterized by caution and even a certain responsibility. The United States fears an uncontrolled escalation of the conflict, every time it emphasizes its non-involvement in military actions and seeks to localize them within the borders of Ukraine. Even though the Russian Federation is also wary of striking at the territory of NATO countries, the conflict between them continues to develop in an escalating spiral. The war is gradually moving beyond the mediated relations between Russia and the countries of the North Atlantic Treaty Organization. With the expansion of supplies of increasingly destructive weapons and the direct involvement of NATO members in the confrontation with the Russian military, it acquires a full-fledged character with the prospect of going beyond the borders of Ukraine and using unconventional weapons

Про передумови виникнення анатомії в Стародавній Греції.

Стаття присвячена аналізу обстановки виникнення перших анатомічних досліджень тварин в науці Древньої Греції. Розглянуто діяльність натурфілософів: Алкмеона Кротонского, Емпедокла і Діогена аполлонійске по дослідженню співвідношення дихальної і кровоносної систем тварин, а також їх зв'язок з положеннями піфагорійської філософської доктрини

Вчений і організатор науки - Володимир Порфирійович Карпов (1870-1943).

Karpov in the 1910s - 1920s created a whole school of histologists, which included such scientists as Professor M. Ya. Subbotin (head of the histology department at the Novosibirsk Medical Institute), professor N. L. Gerbilsky (head of the biology department at Leningrad University), professor B. P. Khvatov, creator of the Crimean school of embryologists; professor G.M. Semenov (Samarkand University); Professor N.Kh. Flerov (head of the histology department at the Voronezh Medical University), Professor P.Ya. Lakhovsky (organizer of the histology department at the Kuban Medical Institute, and then at Perm and Gorky Medical Institute). His textbooks and teaching aids on histology have survived multiple reprints. But, unfortunately, not much is known about Karpov himself.Карпов в 1910-е – 1920-е годы создал целую школу гистологов, куда входили такие ученые, как профессор М. Я. Суб­ботин (заведующий кафедрой гистологии в Новосибирском медицинском институте), профессор Н. Л. Гербильский (заведующий кафедрой биологии в Ленинградском университете), профессор Б. П. Хватов, создатель Крымской школы эмбриологов; профессор Г.М. Семенов (Самаркандский университет); профессор Н.Х. Флеров (заведующий кафедрой гистологии Воронежского медицинского университета), профессор П.Я. Лаховский (организатор кафедры гистологии в Кубанском медицинском институте, а затем в Пермском и Горьковском медицинских институтах). Его учебники и учебные пособия по гистологии выдержали многократное переиздание. Но, к сожалению, не много известно о самом В.П. Карпове.Карпов у 1910-і - 1920-і роки створив цілу школу гістологів, куди входили такі вчені, як професор М. Я. Суботін (завідувач кафедри гістології в Новосибірському медичному інституті), професор М. Л. Гербільський (завідувач кафедрою біології в Ленінградському університеті), професор Б. П. Хватов, засновник Кримської школи ембріологів; професор Г.М. Семенов (Самаркандський університет); професор Н.Х. Флеров (завідувач кафедри гістології Воронезького медичного університету), професор П.Я. Лаховський (організатор кафедри гістології в Кубанському медичному інституті, а потім в Пермському і Горьківському медичних інститутах). Його підручники і навчальні посібники з гістології витримали багаторазове перевидання. Але, на жаль, не багато відомо про самого В.П. Карпова

Про передумови виникнення анатомії в Стародавній Греції.

The article is devoted to the analysis of the situation of the appearance of the first anatomical studies of animals in the science of Ancient Greece. The work of natural philosophers: Alcmaeon of Croton, Empedocles and Diogenes Apollonius on the relationship between the respiratory and circulatory systems of animals, as well as their relationship with the provisions of the Pythagorean philosophical doctrine is considered.Статья посвящена анализу обстановки возникновения первых анатомических исследований животных в науке Древней Греции. Рассмотрена деятельность натурфилософов: Алкмеона Кротонского, Эмпедокла и Диогена Аполлонийского по исследованию соотношения дыхательной и кровеносной систем животных, а также их связь с положениями пифагорейской философской доктрины.Стаття присвячена аналізу обстановки виникнення перших анатомічних досліджень тварин в науці Древньої Греції. Розглянуто діяльність натурфілософів: Алкмеона Кротонского, Емпедокла і Діогена аполлонійске по дослідженню співвідношення дихальної і кровоносної систем тварин, а також їх зв'язок з положеннями піфагорійської філософської доктрини

Basis for choice of treatment of patients with fracture of the proximal humeral

In the article reported the results of analysis of the treatment of 531 patients with fracture of the proximal humeral. As part of the study it was shown that using of the external osteosyntesis provides good results, which are not depend on bone mineral density. The results of the conservative treatment depend on premorbid condition of the osseous tissue. Whence external osteosyntesis is more convenient, the method of intramedullary fixation provides better results, and conservative treatment is reasonable for elder year class with normal bone mineral density

The analisis of the standards for decision of surgical treatment proximal humeral. Anatomical research

The article provides information about habits of the routes to the proximal humeral for people with different constitution. The clinical studies were made on 55 corpses, which were put in order of constitution, body mass and shoulder-elbow length. Results of studies have shown us that for people with normal body mass better to use anterior approach in a case of fracture with breaking of the proximal humerus, transdeltoid rout for people with transvers fractures of collum and low bone mineral density. As for people with subnormal body an anterior approach is more convenient than transdeltoid rout, and for patients with overweight and lipotrophy of the I degree selection of the rout depends on character of the fracture and optimal method of the osteosynthesis

Facteurs associés à la sténose coronaire conventionnelle stent de récidive.

RESUMENLa reestenosis es la principal limitación del intervencionismo coronario percutáneo con stent a mediano y largo plazo con frecuentes recurrencias después de un primer episodio. Con el objetivo de identificar facto-res asociados a la recurrencia de la misma, se realizó un estudio de cohorte retrospectiva en el hospital “Hermanos Ameijeiras” donde se incluyeron 166 pacientes con reestenosis luego del implante de stent coronarios convencionales entre enero del 2010 y diciembre del 2013. Para determinar las variables asociadas con el comportamiento reestenótico recidivante se practicó un análisis univariado y multivariado (regresión logística). El 69,3% fueron hombres, 101(60.8%) presentaron angina estable, 44% tuvieron reestenosis difusa y la arteria descendente anterior estuvo afectada en 92 pacientes. Fueron tratados mediante angioplastia coronaria 130 pacientes, en el 54.2% se implantaron stents convencionales y la tasa de éxitoangiográfico fue del 97,7%. La reestenosis recidiva en un 25,3% de los casos. El patrón morfológico difuso constituyó la única variable que se asoció de forma independiente (p=0.037) a la recurrencia de la reesteno-sisintrastent.Palabras clave: stent metálicos no recubiertos, reestenosis._________________________________________________________________________________AbstractStent restenosis is the main medium and long term limitation of percutaneous coronary intervention with stent. With the objective of characterizing the clinical, angiographic and therapeutic contexts of patients with this complication, a descriptive, retrospective and transverse study was carried out in “Hermanos Ameijeiras” Teaching Hospital with 166 patients with restenosis after bare metal stent implant between January 2006 and December 2010. To determine variables associated with recidivantrestenotic tendency, a univariate and multivariate (logistic regression) analysis was carried out. 69.3% were men, 101(60.8%) had stable angina,44% had diffuse restenosis and the left anterior descending artery was the afected vessel in 92 patients. 130 patients were treated with coronary angioplasty, in 54.2% bare metal stents were deployed and the angiographic success rate was 97.7%. Recidivance ocurred in 25.3% of the cases. The diffuse morphologicalpattern was the only variable associated independently to recurrent intrastent restenosis.Key words: bare metal stent, restenosi

Facteurs associés à la sténose coronaire conventionnelle stent de récidive.

RESUMENLa reestenosis es la principal limitación del intervencionismo coronario percutáneo con stent a mediano y largo plazo con frecuentes recurrencias después de un primer episodio. Con el objetivo de identificar facto-res asociados a la recurrencia de la misma, se realizó un estudio de cohorte retrospectiva en el hospital “Hermanos Ameijeiras” donde se incluyeron 166 pacientes con reestenosis luego del implante de stent coronarios convencionales entre enero del 2010 y diciembre del 2013. Para determinar las variables asociadas con el comportamiento reestenótico recidivante se practicó un análisis univariado y multivariado (regresión logística). El 69,3% fueron hombres, 101(60.8%) presentaron angina estable, 44% tuvieron reestenosis difusa y la arteria descendente anterior estuvo afectada en 92 pacientes. Fueron tratados mediante angioplastia coronaria 130 pacientes, en el 54.2% se implantaron stents convencionales y la tasa de éxitoangiográfico fue del 97,7%. La reestenosis recidiva en un 25,3% de los casos. El patrón morfológico difuso constituyó la única variable que se asoció de forma independiente (p=0.037) a la recurrencia de la reesteno-sisintrastent.Palabras clave: stent metálicos no recubiertos, reestenosis._________________________________________________________________________________AbstractStent restenosis is the main medium and long term limitation of percutaneous coronary intervention with stent. With the objective of characterizing the clinical, angiographic and therapeutic contexts of patients with this complication, a descriptive, retrospective and transverse study was carried out in “Hermanos Ameijeiras” Teaching Hospital with 166 patients with restenosis after bare metal stent implant between January 2006 and December 2010. To determine variables associated with recidivantrestenotic tendency, a univariate and multivariate (logistic regression) analysis was carried out. 69.3% were men, 101(60.8%) had stable angina,44% had diffuse restenosis and the left anterior descending artery was the afected vessel in 92 patients. 130 patients were treated with coronary angioplasty, in 54.2% bare metal stents were deployed and the angiographic success rate was 97.7%. Recidivance ocurred in 25.3% of the cases. The diffuse morphologicalpattern was the only variable associated independently to recurrent intrastent restenosis.Key words: bare metal stent, restenosi