SCHOOL OF HISTORIANS OF ST. VOLODYMYR UNIVERSITY AT THE END OF 40`S – IN THE MIDDLE OF 60`S OF THE XIX CENTURY (TO THE HISTORYOHRAPHY OF QUESTION)

We honored the historians of St. Volodymyr University Professors P. V. Pavlov, O. I. Stavrovsky, V. Ya. Shul`gin. We analyzed the historiography of the second half of the XIX – the beginning of the XXI century which is devoted to the study of life, teaching, and scientific activity of these teachers. We proved that the period of teaching and scientific activity of P. V. Pavlov, O. I. Stavrovsky, V. Ya. Shul`gin at the St. Volodymyr University from the end of 40's till the middle of 60's of the XIX century was the time of the second period of formation of the School of Historians of the St. Volodymyr University of the XIX century. We noted that historians of the St. Volodymyr University of the XIX century P. V. Pavlov, O. I. Stavrovsky, V. Ya. Shul`gin were among the founders of Ukrainian historical education and science. We emphasized that the study of the history of the formation and development of the School of Historians of the St. Volodymyr University of the XIX century has the great importance for understanding the formation and development of University historic education and science in the XIX at the beginning of the XXI centuries in general.Keywords: P. V. Pavlov, O. I. Stavrovsky, V. Ya. Shul`gin, the second period of the formation of the School of Historians of St. Volodymyr University, the end of 40`s - the middle of the 60's of the XIX century, Kyiv

Direct current driven by ac electric field in quantum wells

It is shown that the excitation of charge carriers by ac electric field with zero average driving leads to a direct electric current in quantum well structures. The current emerges for both linear and circular polarization of the ac electric field and depends on the field polarization and frequency. We present a micoscopic model and an analytical theory of such a nonlinear electron transport in quantum wells with structure inversion asymmetry. In such systems, dc current is induced by ac electric field which has both the in-plane and out-of-plane components. The ac field polarized in the interface plane gives rise to a direct current if the quantum well is subjected to an in-plane static magnetic field.Comment: 6 pages, 3 figure

Conditions of Invertibility for Functional Operators with Shift in Weighted Hölder Spaces

We consider functional operators with shift in weighted Hölder spaces. The main result of the work is the proof of the conditions of invertibility for these operators. We also indicate the forms of the inverse operators. As an application, we propose to use these results for the solution of equations with shift encountered in the study of cyclic models for natural systems with renewable resources.Розглядаються функціональні оператори із зсувом у просторах Гельдера з вагою. Основним результатом роботи є встановлення умов оборотності для цих операторів. Вказано види оберненого оператора. Як застосування запропоновано використовувати отримані результати для розв'язання рівнянь із зсувом, які виникають при дослідженні циклічних моделей природних систем з ресурсами, що відновлюються

Ultrastructure of meristem and root cap of pea seedlings under spaceflight conditions

Data of electron microscopic analysis of meristem and root cap of pea seedlings grown aboard the Salyut-6 orbital research station in the Oazis apparatus and in the laboratory are presented. The main morphological and anatomical characteristics of the test and control plants are shown to be similar. At the same time, some differences are found in the structural and functional organization of the experimental cells as compared to the controls. They concern first of all the plastic apparatus, mitochondria and Golgi apparatus. It is assumed that cell function for certain periods of weightlessness on the whole ensures execution of the cytodifferentiation programs genetically determined on the Earth. Biochemical and physiological processes vary rather markedly due to lack of initially rigorous determination

Quality indicators of fish from the water of the southern region of Ukraine

A study of the fish caught in the reservoirs of the Khadzhibey estuary (Odesa region) was conducted in order to determine its quality and safety according to microbiological indicators. No pathogenic or conditionally pathogenic microorganisms were found in all the fish samples studied – mirror carp (Cyprinus carpio) and round goby (Neogobius melanostomus). During the study of physico-chemical indicators of water quality and safety of the estuary, water samples were taken for the content of pesticides, insecticides and heavy metals. The content of cadmium, copper, lead and mercury does not exceed the permissible level for fish farms, zinc exceeds the maximum permissible concentration by 2.3 – 3.0 % (depending on the period of the year). The insecticide dichlorodiphenyltrichloromethylmethane was found in the water, the content of which exceeds the maximum allowable concentration for sea fishing ponds by 18 %, and the pesticide beta-hexochlorocyclohexane – by 5.2 %. It has been studied and established that the fish caught in the estuary, according to its microbiological and physicochemical indicators, is safe, does not pose a threat to the health of people and animals, and is suitable for further use and consumption

Innovation activity staffing of production plant

The article is focused on the deficiency of highly skilled team that can effectively reach a decision about the complex innovative development problems of production plant in modern Russia. The authors propose the use of the target team work training of staff a decision to the current problem situation. Innovative activities, staffing management, further vocational education, teamwork training, team buildingye

Одержання нових 2-гетарилтіазолів за реакцією Стілле

A preparative approach to the synthesis of 2-hetaryl thiazoles has been developed via the interaction of halothiazoles with stannanes according to the Stille reaction. The most effective catalysts and reaction conditions have been found. It has been determined that the formation of by-products occurs due to specific interaction of the corresponding stannanes with the carbonyl group. The by-products have been isolated and characterized. The mechanism of this interaction with the carbonyl group has not been described in literature. The 2-hetaryl thiazoles obtained have great potential as new building blocks for medicinal chemistry and as ligands due to their complexing properties.Розроблено препаративний підхід до синтезу 2-гетарилтіазолів, що полягає у взаємодії галогенотіазолів зі станнанами за реакцією Стілле. Визначено найбільш ефективні каталізатори та умови проведення реакції. З’ясовано, що за рахунок специфічної взаємодії відповідних станнанів з карбонільною групою відбувається утворення побічних продуктів, які виділили та схарактеризували. Механізм такої взаємодії з карбонільною групою в літературі не описано. Завдяки своїм комплексоутворювальним властивостям отримані 2-гетарилтіазоли мають великий потенціал як нові будівельні блоки для медичної хімії та як ліганди

Synthesis of Azobenzene-Containing Polymers based on Polymethacrylic Acid and their Photooptical Properties Studies

Preparative method of synthesis of new photochromic polymers based on polymethacrylic acid by post-coupling reaction was found. Azobenzene side-chains of obtained polymers contain derivatives of different nature. Photooptical properties of polymer films, in particular the orientation under polarized light influence and the ability to orient the liquid crystal covered on them were studied