Current trends for improving the design of membrane devices for photoautotrophic biosynthesis is light dependent microorganisms

Modern trends in improving the design of membrane devices for photoautotrophic biosynthesis dependent lighting microorganisms aimed at a significant increase in the productivity of valuable products from biomass of microalgae and obtaining on the basis of their individual useful substances (drugs) used in various industries and medicine. In film devices effectively the processes of heat - and mass-exchange with the gas comes into contact with the culture fluid flowing as a film on a transparent film-forming surface is STI in its light intensity and autotrophic biosynthesis occurs only in the presence of a mixture of air with carbon dioxide. Thus, completely eliminated the accumulation of metabolic products due to their continuous removal from film culture liquid with the process gas, which is not typical for devices of other types. Small size membrane bioreactors may increase the degree of saturation of the liquid carbon dioxide with the possibility of changing the concentration of gas in the culture fluid and to ensure the cultivation of microorganisms with a specified biomass yield. At present up to date-developed a significant number of ways to ensure contact of the gas with the liquid (bubbling, gas-lift, mechanical stirring, jet, membrane, etc.) on the basis of which an industrial bioreactor, with various "stress" effect. It is believed that for the cultivation of the most optimal are bioreactors with mechanical stirring of the liquid, which allow the greatest productivity of biomass. However, the applied model of a mechanical mixing device to create a work whose cavity of the bioreactor chaotic, disorganized mixing, which contributes to the emergence, insufficient for the sustenance of the cell cultures and microorganisms. Analysis of the interactions of the gas with the liquid film devices showed the need to create a new generation of bioreactor with intensive mass transfer without the possibility of limiting the productivity of biotechnological systems. The work shows a consistent change in structural elements of membrane bioreactors to increase the efficiency of their operation

Влияние радиуса идеально проводящего цилиндра на диаграмму направленности расположенной на нем патч-антенны

In this paper, we consider the change in the directional pattern of a microstrip patch antenna located on a perfectly conducting plane and a cylinder covered with a dielectric layer. The mathematical apparatus of the Green’s tensor functions for flat and cylindrical layered metaldielectric structures is used to calculate field characteristics. The obtained results are of special interest in the design of conformal single radiators and antenna arrays located on curved surfaces that can be approximated by a cylinder, for example, the fuselage of small-sized aircraft or supports for the installation of antenna systems. It is demonstrated that the curvature of the base surface for a single element has little effect on the radiation pattern within the width of the main lobe; nevertheless, the increase in the radius of the used cylinder influences the level of the back lobe significantly. Chechetkin V. A., Shabunin S. N., Korotkov A. N. Influence of the radius of a perfectly conducting cylinder on the radiation pattern of a patch antenna. Ural Radio Engineering Journal. 2022;6(1):54–66. (In Russ.) DOI: 10.15826/urej.2022.6.1.002. В работе рассматривается влияние кривизны проводящей поверхности со слоем диэлектрика, на которой расположена микрополосковая патч-антенна, на ее диаграмму направленности. Для расчета полевых характеристик используется математический аппарат тензорных функций Грина для плоских и цилиндрических слоистых металло-диэлектрических структур. Полученные результаты представляют интерес при проектировании конформных одиночных излучателей и антенных решеток, расположенных на криволинейных поверхностях, которые возможно аппроксимировать цилиндром, например фюзеляж малогабаритных летательных аппаратов или опоры для установки антенных систем. Показано, что кривизна поверхности основания для одиночного элемента слабо влияет на диаграмму направленности в пределах ширины главного лепестка, тем не менее увеличение радиуса используемого цилиндра значительно влияет на уровень заднего лепестка. Чечеткин В. А., Шабунин С. Н., Коротков А. Н. Влияние радиуса идеально проводящего цилиндра на диаграмму направленности расположенной на нем патч-антенны. Ural Radio Engineering Journal. 2022;6(1):54–66. DOI: 10.15826/urej.2022.6.1.002.

Radiation Patterns of Patch Antennas on Coated Conducting Cylinders

The development of the Internet of Things and communication systems of the fifth generation leads to the need to place many antenna elements in a limited volume. Therefore, wearable electronics antennas are often located directly on the device body. Such surfaces can often be thought of as a conducting cylinder covered with a dielectric material. The task of analysing the radiation patterns of antennas located on such surfaces becomes urgent. This paper shows a method for analysing antenna directivity diagrams using the Green's functions method of cylindrical layered media. This method allows to obtain in an analytical form the expressions for the analysis of such structures, which makes it possible to reduce the cost of computer time in modelling. The presented results show what kind of distortions are introduced into the radiation pattern of antennas located on a cylinder compared to an antenna located on a flat surface. © 2021 Institute of Physics Publishing. All rights reserved.The research was executed by the Grant of the Ministry of science and higher education of the Russian Federation (Project N 0836–2020–0020)

Radio Electronics Development Trends (Review of the International Conference)

Поступила: 18.07.2020. Принята в печать: 30.07.2020.Received: 18.07.2020. Accepted: 30.07.2020.Данная статья посвящена обзору тенденций развития радиоэлектроники, которые были обозначены в ходе проведения Международной конференции Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology в мае 2020 г. в Екатеринбурге. Проводится анализ тематик конференции в секции радиоэлектроники, связанных с перспективными телекоммуникационными технологиями, в том числе касающихся разработки антенно-фидерных устройств, измерения электрофизических параметров материалов и т.д.This article is devoted to the overview of the trends in the development of radio electronics, which were identified during the International conference Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology in May, 2020 in Yekaterinburg. We analyze the topics of the conference in the radio electronics section related to promising telecommunication technologies, including those related to the development of antennas, microwave devices, electrophysical parameters of materials, etc

Giant bleeding post-traumatic thoracic sarcoma management: A case report

The heterogeneity of thoracic wall tumors often represents challenging clinical entities for surgeons due to diagnostic and treatment complexities. The primary tumors, metastases, or direct invasion from intrathoracic structures comprise almost half of all cases on average that are proved to be malignant. Surgery treatment usually leaves large chest defects that require further extensive reconstruction and multimodal management including radiotherapy and chemotherapy. We report a rare case of a giant (30 cm) post-traumatic bleeding thoracic sarcoma treatment in a 70-year-old female. The use of our modified Verneuil technique to close the extensive postoperative skin defect optimized surgical wound management and provided good functional and aesthetic results. Four-year follow-up outcomes after surgical and adjuvant radiation therapy reported a high level of tumor control and showed no evidence of postoperative disease recurrence

ENDOSCOPIC ULTRASOUND-GUIDED RESECTION OF SOMATOSTATINOMA OF THE AMPULLA OF THE MAJOR DUODENAL PAPILLA IN THE PATIENT WITH INHERITED NEUROFIBROMATOSIS

Case report. We present the case of a 50-year-old female patient with inherited type 1 neurofibromatosis, who was found to have a tumor in the major duodenal papilla. She underwent endoscopic ultrasound-guided resection of the major duodenal papilla with subsequent histological and immunohistochemical examination. Discussion. Somatostatinomas are rare neuroendocrine tumors of the gastrointestinal tract with an annual incidence of 1 case per 40 million people. The combination of type 1neurofibromatosis and somatostatinoma of the ampulla of the major duodenal papilla occurs extremely rarely. Endoscopic ultrasound provides visualization of tumor spread in all layers of the intestinal wall and in the major duodenal papilla, thus giving opportunity to perform radical surgery by minimally invasive method. Conclusions. Minimally invasive endoscopic surgery in patients with a combination of type 1 neurofibromatosis and somatostatinoma is a good alternative to pancreatic resection in this rare category of patients. Further follow-up studies are needed

Influence of the radius of a perfectly conducting cylinder on the radiation pattern of a patch antenna

Поступила: 11.11.2021. Принята в печать: 07.12.2021.Received: 11.11.2021. Accepted: 07.12.2021.В работе рассматривается влияние кривизны проводящей поверхности со слоем диэлектрика, на которой расположена микрополосковая патч-антенна, на ее диаграмму направленности. Для расчета полевых характеристик используется математический аппарат тензорных функций Грина для плоских и цилиндрических слоистых металло-диэлектрических структур. Полученные результаты представляют интерес при проектировании конформных одиночных излучателей и антенных решеток, расположенных на криволинейных поверхностях, которые возможно аппроксимировать цилиндром, например фюзеляж малогабаритных летательных аппаратов или опоры для установки антенных систем. Показано, что кривизна поверхности основания для одиночного элемента слабо влияет на диаграмму направленности в пределах ширины главного лепестка, тем не менее увеличение радиуса используемого цилиндра значительно влияет на уровень заднего лепестка.In this paper, we consider the change in the directional pattern of a microstrip patch antenna located on a perfectly conducting plane and a cylinder covered with a dielectric layer. The mathematical apparatus of the Green’s tensor functions for flat and cylindrical layered metaldielectric structures is used to calculate field characteristics. The obtained results are of special interest in the design of conformal single radiators and antenna arrays located on curved surfaces that can be approximated by a cylinder, for example, the fuselage of small-sized aircraft or supports for the installation of antenna systems. It is demonstrated that the curvature of the base surface for a single element has little effect on the radiation pattern within the width of the main lobe; nevertheless, the increase in the radius of the used cylinder influences the level of the back lobe significantly.Работа выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации в рамках соглашения № 075-11-2019-052 от 13.12.2019 с Научно-производственным объединением автоматики имени академика Н. А. Семихатова (АО «НПО автоматики») по комплексному проекту «Создание высокотехнологичного производства высокочастотного радара, предназначенного для использования в составе интеллектуальных систем помощи водителю, систем автоматического управления беспилотных транспортных средств и систем интеллектуального земледелия» при участии ФГАОУ ВО «Уральский федеральный университет имени первого Президента России Б. Н. Ельцина» (ФГАОУ ВО «УрФУ») в части выполнения научно-исследовательских, опытно-конструкторских и технологических работ.This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation under agreement No. 075-11-2019-052 dated December 13, 2019 with the Scientific and Production Association of automatics named after academician N. A. Semikhatov in the complex project “Creation of a high-tech production of a high-frequency radar intended to be used as a part of intelligent driver assistance systems, automatic control systems for unmanned vehicles and intelligent farming systems” with the participation of the Ural Federal University named after the First President of Russia B. N. Yeltsin in terms of the implementation of research, development and technological work

Первый опыт применения машинной холодовой оксигенированной перфузии почечного трансплантата от доноров с расширенными критериями

Objective: to evaluate the safety and efficacy of hypothermic oxygenated machine perfusion (HOPE) for kidney grafts obtained from expanded criteria donors (ECD).Materials and methods. From June 2018 to June 2021, 200 surgeries involving kidney transplants from deceased donors were performed at Botkin City Clinical Hospital. Of these, 123 were men (61.5%) and 77 were women (38.5%). The mean age was 47.62 ± 11.69 (20–73) years. In 102 cases, kidney grafts were procured from ECD. In 92 recipients (90.2%) of kidney transplants from an expanded criteria donor, static cold storage done according to the standard technique was used to preserve the organ; these patients constituted observation group 1. In 10 recipients (9.8%), hypothermic oxygenated perfusion was used in addition to static cold preservation; these patients formed observation group 2.Results. No 30-day mortality was recorded in both observation groups. The mean static cold storage time in group 1 patients was 612.33 ± 178.88 (133–1180) minutes. Overall incidence of delayed graft function was 26.5% (53/200). Incidence of delayed graft function was 19.3% (19/98) for organs from standard donors using static cold storage and 35.8% (33/92) for ECD organs. Twenty-five patients (12.5%) had postoperative complications. Postoperative complications with delayed graft function were diagnosed in 12 patients, which was 22.6% (12/53), with immediate function in 13 patients, which was 8.8% (13/147). Mean cold storage time in group 2 patients was 319.11 ± 110.24 (311–525) minutes. Mean HOPE time was 202.34 ± 21.48 (150–210) minutes. Delayed graft function was recorded in 1 group 2 patient (10%). No complications, including perfusion-related one, were recorded in this group.Conclusion. The unique technique used at Botkin City Clinical Hospital for HOPE in kidney transplant is safe. It provides a low risk of delayed graft function for ECD kidneys.Цель: оценить безопасность и эффективность машинной холодовой оксигенированной перфузии почечных трансплантатов от доноров с расширенными критериями.Материалы и методы. С июня 2018 года по июнь 2021 года в хирургической клинике Боткинской больницы выполнено 200 трансплантаций почки от посмертного донора. Из них 123 – мужчинам (61,5%) и 77 – женщинам (38,5%). Средний возраст составил 47,62 ± 11,69 (20–73) года. В 102 случаях почечный трансплантат был изъят у донора с расширенными критериями. У 92 реципиентов (90,2%) почечного трансплантата от донора с расширенными критериями для сохранения органа использовалась статическая холодовая консервация по стандартной методике, эти пациенты составили I группу наблюдения. У 10 реципиентов (9,8%) выполнялась постхолодовая машинная оксигенированная перфузия, эти пациенты составили II группу наблюдения.Результаты. В обеих группах наблюдения не зафиксировано 30-дневной летальности. Среднее время статической холодовой консервации у пациентов первой группы составило 612,33 ± 178,88 (133–1180) минуты. Общая частота отсроченной функции почечного трансплантата составила 26,5% (53/200). При использовании органа от стандартного донора с применением статической холодовой консервации частота развития отсроченной функции трансплантата составила 19,3% (19/98), от донора с расширенными критериями – 35,8% (33/92). Послеоперационные осложнения зафиксированы у 25 пациентов (12,5%). Послеоперационные осложнения при развитии отсроченной функции трансплантата диагностированы у 12 больных, что составило 22,6% (12/53), с немедленной функцией – у 13 больных, что составило 8,8% (13/147). Среднее время холодовой консервации у пациентов II группы составило 319,11 ± 110,24 (311–525) минуты. Среднее время машинной холодовой оксигенированной перфузии – 202,34 ± 21,48 (150–210) минуты. У 1 пациента (10%) II группы наблюдения зафиксирована отсроченная функция трансплантата. Осложнений, в том числе связанных с перфузией, в этой группе больных не зафиксировано.Заключение. Оригинальная методика Боткинской больницы по машинной холодовой оксигенированной перфузии почечного трансплантата безопасна. Ее проведение ассоциируется с низким риском развития отсроченной функции почечного трансплантата от доноров с расширенными критериями