Linear IgA bullous dermatosis

Aim: to present a clinical case of linear IgA bullous dermatosis.Materials and methods. A 44 years old patient complaining of skin rashes on the trunk and extremities, accompanied by severe itching was examined. We carried out a morphological investigation of biopsy samples derived from the lesion and apparently unaffected skin areas using the method of indirect immunofluorescence.Results. The patient having rashes in the form of multiple vesicles and small bubbles with a tight cover, which had been grouped into figures resembling pearl necklaces, demonstrated the presence of focal subepidermal cracks (subepidermal bubble in one location), as well as a linear deposition of IgA along the epidermal basement membrane. According to the clinical picture and following the histological and immunofluorescent investigation of skin biopsies, the patient was diagnosed with linear IgA bullous dermatosis. Lesion regression was achieved as a result of systemic therapy with prednisolone at a dose of 50 mg per day.Conclusion. The diagnosis of linear IgA bullous dermatosis should be made on the basis of skin biopsy investigation by the method of indirect immunofluorescence. Systemic glucocorticosteroids are seen as an effective approach to the treatment of such patients

Medico-Sanitary and Parasitological Aspects of Rock Pigeon Ecology (<i>Columba livia</i>)

Collected are the data on sanitary-hygienic and parasitological aspects of rock pigeon vital activity in Saratov. Distinguished are the types of pigeon exterior pathologies, their character and frequency of occurrence. Synanthropic population and nests of the birds are searched for the presence of helminthes and ectoparasites. Identified is the role of nesting sites, located in attics of residential buildings, in sanitary and epidemiological situation of the city settlement zone

How calcination affects the morphology and the catalytic activity of polymer supported Nickel

A nickel containing monomer, Ni(AAEMA)2 (AAEMA = deprotonated form of 2-(acetoacetoxy) ethyl methacrylate) was co-polymerized with ethyl methacrylate (co-monomer) and ethylene glycol dimethacrylate (cross-linker) [1]. The obtained polymer was a green methacrylic resin containing Ni(II) centers homogeneously dispersed in the catalyst, which resulted insoluble in all common organic solvents and in water. The material can be described as an amphiphilic resin, air and moisture stable, with the peculiarity to swell in halogenated solvents, acetone and water and to shrink in diethyl ether and petroleum ether. The polymer was calcined under reductive conditions (dihydrogen with initial pressure of 5 bar) following two procedures, differing from each other for the cooling conditions. In the first procedure the calcined material was cooled under dihydrogen gas, while in the second one the cooling step occurred under air. After calcination, the green Ni(II) based co-polymer turned into black resins, Ni-res1 (obtained with hydrogen cooling) and Ni-res2 ((obtained with air cooling). TEM analyses showed that both Ni-res1 and Ni-res2 supported Ni nanoparticles with different morphologies, being the metal nanoparticles onto Ni-res1 smaller than the ones dispersed in Ni-res2, that had an urchin-like shape. Both Ni based co-polymers were tested as catalysts in the reduction of nitrobenzene with NaBH4 [2]. Ni-res1 resulted more active and selective towards aniline, with respect to Ni-res2. [1] M.M. Dell’Anna, G. Romanazzi, P. Mastrorilli, Curr. Org. Chem. 17 (2013) 1236 [2] A.M. Fiore, G. Romanazzi, M.M. Dell’Anna, M. Latronico, C. Leonelli, A. Rizzuti, M. Mali, P. Mastrorilli, Mol. Catal. 476 (2019) 11050

Quality management system – modern condition and experience of implementation in the education system of the RUSSIAN FEDERATION

In recent decades, there has been intense competition in the market for educational services. One of the tools ensuring the maintenance of competitive indicators at a high level is the introduction of a quality management system (QMS) in the universityВ последние десятилетия на рынке образовательных услуг существует жёсткая конкуренция. Одним из инструментов, обеспечивающим поддержание конкурентоспособных показателей на высоком уровне, является внедрение системы менеджмента качества (СМК) в вуз

Effect of lithium borate coating on the electrochemical properties of LiCoO2 electrode for lithium-ion batteries

The effect of a protective coating of fused lithium borate, Li3BO3, on the physicochemical and electrochemical characteristics of LiCoO2 has been studied. A cathode material produced by the SCS method using binary organic fuel, glycine and citric acid. The influence of the experiment conditions on the morphology, crystal structure and specific surface of lithium cobaltite was studied. Electrochemical testing of LiCoO2∙nLi3BO3 samples, n = 5 and 7 mass %, has been performed in the cathode Li|Li+-electrolyte|LiCoO2∙nLi3BO3 half-cell using 1M LiPF6 in EC/DMC mixture (1:1) as electrolyte in the 2.7-4.3 V range at normalized discharge current С/10, С/5, С/2. The maximal initial discharge capacity of 185 mAh/g was detected for the samples with 5 mass % Li3BO3. The coulomb efficiency of optimal materials in the 40th cycle was 99.1%

Analysis of Plots and Sources of Orientalist Motifs in Russian Porcelain of the 18th–19th Centuries

Поступила в редакцию 26.10.2018. Принята к печати 26.02.2019.Submitted on 26 October, 2018. Accepted on 26 February, 2019.Статья посвящена анализу сюжетов и источников, положивших начало теме ориентализма в русском фарфоре в XVIII и XIX вв. Представляется весьма важным выделить постепенный процесс развития мотивов ориентализма в русском фарфоре и показать их эволюцию, а также необходимо ответить на вопрос: почему именно ориенталистские мотивы выбирались заказчиками фарфора и какую роль они играли в тот или иной период времени для декоративно-прикладного искусства Российской империи. В статье представлен последовательный анализ эволюции ориенталистских мотивов в русском фарфоре XVIII–XIX вв. В работе применен метод формально-стилистического анализа. Использование данного метода позволяет изучить стилистическое происхождение ориенталистских мотивов: в рамках какой традиции, стиля и почему появилась мода на мотивы ориентализма в фарфоре. Также в статье реализован историко-генетический метод, выраженный в попытке проследить рождение и развитие феномена ориенталистских мотивов на основе литературы, исторических источников и фарфоровых предметов. Применяя методы исторического и культурного анализа, в работе исследуются и освещаются исторические основы возникновения и развития мотивов ориентализма в русском фарфоре. Кроме того, данные методы уместно применить, чтобы понять, как вкусовые предпочтения заказчиков фарфора в Российской империи во второй половине XVIII–XIX вв. повлияли на стилистическое формирование «восточных» мотивов. Корпус источников представлен, в первую очередь, фарфоровыми изделиями XVIII и XIX вв., альбомами гравюр и узорными книгами фарфоровых заводов, содержащими рисунки и разработки моделей для фарфоровых изделий. Использовались данные источники в первую очередь для того, чтобы отыскать модели и декор, выполненные с ориенталистским экзотическим оттенком. По такому же принципу были изучены номера периодических изданий XIX в. — в них необходимо было найти упоминания и факты, непосредственно касающиеся феномена возникновения и развития ориенталистских мотивов в фарфоровом производстве. Также важным представляется изучить и осветить ряд литературных произведений с элементами ориентализма, по сюжетам которых создавалась и разрабатывалась живопись по фарфору. Традиционно ориенталистские мотивы обобщаются исследователями в единую концепцию экзотики в русском искусстве. Данное исследование способствует развитию нового взгляда на ориенталистские мотивы в фарфоровых изделиях, произведенных в Российской империи в XVIII–XIX вв.This article examines subjects and decorative sources of orientalism in Russian porcelain of the 18th and 19th centuries. It seems important to single out stages of the incremental development of orientalist motifs in Russian porcelain and describe their evolution. Additionally, the authors aim to clarify why orientalist motifs were chosen by porcelain collectors and buyers and what role they played in arts and crafts in Russian Empire at different times. The article presents a consistent analysis of the evolution of orientalist motifs in 18th–19th centuries Russian porcelain. This study employs methods of formal and stylistic analysis. The use of these methods allows the authors to study the stylistic origins of orientalist motifs answering the question regarding the framework of its stylistic tradition and why a fashion emerged for the motifs described in this research. Furthermore, the researchers use the historical-genetic method trying to trace the emergence and development of the phenomenon of orientalist motifs on the basis of literature, historical sources, and porcelain objects. By applying methods of historical analysis and cultural analysis, this paper investigates and highlights the historical background of the emergence and development of orientalist motifs in Russian porcelain. Additionally, these methods are appropriate to understand how the taste preferences of customers of porcelain in the Russian Empire between the second half of the 18th and the 19th centuries influenced the stylistic formation of orientalist motifs. The sources of the study are mostly porcelain items made between the 18th and the 19th centuries, albums of engravings and pattern books of porcelain manufactures, containing drawings and model designs for porcelain items. The authors refer to these sources in order to reveal models and patterns characterised by orientalist motifs. Relying on the same principles, the authors study periodicals of the 19th century in order to find references and facts concerning the emergence and development of orientalist motifs in porcelain production. They also consider it important to study and describe a number of works of literature with elements of orientalism which became the basis for painting in porcelain items. Traditionally, orientalist motifs have been generalised in the concept of exoticism in Russian arts and crafts. This research contributes to a new understanding of orientalist motifs in porcelain painting and decoration created in the 18th–19th centuries Russian Empire

FEATURES OF HEART RATE REGULATION IN ADOLESCENTS WITH ESSENTIAL HYPERTENSION

Cardiointervalography is an important method of analyzing the regulation of heart rate variability, which allows evaluating the balance of the entire spectrum of humoral-metabolic and vegetative effects, both in condition of physiological rest and in various functional tests. It is noted that in hypertensive patients, in most cases, there is a chronic predominance of ergotrophic metabolic reactions that reflect the system tension in the regulatory mechanisms. The aim of our study was to conduct a comparative analysis of the features of the mechanisms of heart rate regulation in adolescents with confirmed essential hypertension and their healthy age mates. Material and methods. The study involved 50 adolescents (12–16 years of age) – 26 boys and 24 girls with labile essential hypertension (EHT) and stage 1 HT on the background of the standard medical correction of blood pressure (enalapril 0,58 mg/kg per day). Each participant of the study and control group underwent recording of at least 512 cardio cycles in the state of physiological rest in a sitting position, as well as registration of blood pressure. Results and discussion. We have found that for adolescents with EHT a significantly lower (by 15 %) average duration of the heart cycle is typical in combination with a decrease in the variation range, which indicates some rigidity of the heart rate regulatory mechanisms. The relative decrease in the proportion of high-frequency spectrum components in comparison with the low-frequency and very low-frequency ranges in adolescents with hypertension also indicated a tendency to predominance of sympathicotonic effects with the predominant involvement of the structures of the diencephalic region and the brain stem. At the same time blood pressure inversely correlated with the index of the variation range of cardiointervals, reflecting the lower adaptive potential of the heart rate regulation mechanisms. Conclusion. We have found regular changes in the regulation of heart rate in adolescents with hypertension, that can be taken as markers of its progressive development and used by clinicians to develop more personalized approaches to medication treatment

Effect of Lithium Borate Coating on the Electrochemical Properties of LiCoO2 Electrode for Lithium-Ion Batteries

Received: 13.10.2020. Revised: 18.11.2020. Accepted: 26.11.2020. Available online: 21.12.2020.This article belongs to the regular issue.The effect of a protective coating of fused lithium borate, Li3BO3, on the physicochemical and electrochemical characteristics of LiCoO2 has been studied. A cathode material produced by the SCS method using binary organic fuel, glycine and citric acid. The influence of the experiment conditions on the morphology, crystal structure and specific surface of lithium cobaltite was studied. Electrochemical testing of LiCoO2∙nLi3BO3 samples, n = 5 and 7 mass %, has been performed in the cathode Li|Li+-electrolyte|LiCoO2∙nLi3BO3 half-cell using 1M LiPF6 in EC/DMC mixture (1:1) as electrolyte in the 2.7-4.3 V range at normalized discharge current С/10, С/5, С/2. The maximal initial discharge capacity of 185 mAh/g was detected for the samples with 5 mass % Li3BO3. The coulomb efficiency of optimal materials in the 40th cycle was 99.1%.The work was performed in accordance with the state as-signments of the Institute of Chemistry of Solids of the Ural Branch of the RAS, No. AAAA-A19-119031890026-6 and No. АААА-А19-119102990044-6, the state assignment of the Institute of Problems of Chemical Physics of the RAS, No. АААА-А19-119061890019-5, and Thematic map No. 0089-2019-0007 «Functional materials for chemical power sources»

Enhanced high-harmonic generation from chromium-doped magnesium oxide

High-order harmonic generation (HHG) from crystals offers a new source of coherent extreme ultraviolet (XUV) attosecond radiation.Comment: Significant change of conten