RESEARCH OF STRUCTURE AND PROPERTIES OF FLAT SHEET ROLLED PRODUCTS FROM ALLOYS OF THE Al–Mg SYSTEM WHICH ECONOMICALLY DOPED BY SCANDIUM

В работе представлены результаты исследования структуры и свойств листов, полученных горячей и холодной прокаткой из алюминиевых термически неупрочняемых сплавов на основе системы Al–Mg. Показана возможность получения листового проката из экономно легированных переходными металлами сплавов системы Al–Mg с комплексом механических свойств, превосходящих уровень свойств полуфабрикатов из сплава 5083.The paper presents the results of studying the structures and properties of sheets obtained by hot and cold rolling from aluminum thermally non-hardening alloys based on the Al–Mg system. The possibility of producing of flat sheets rolled products from alloys of the Al–Mg system which economically doped by transition metals with a complex of mechanical properties that are superior to the level of properties of semi-finished products from alloy 5083 is shown.В работе использованы результаты исследований, выполненных в ходе проекта 03.G25.31.0265 «Разработка экономнолегированных высокопрочных Al-Sc сплавов для применения в автомобильном транспорте и судоходстве» в рамках Программы реализации комплексных проектов по созданию высокотехнологичного производства, утвержденных постановлением Правительства РФ № 218 от 9 апреля 2010 г

Research of complexing abilities of antiviral azolotriazins and azolopyrimidines towards magnesiun ions

The article presents the results of the research of complexing abilities of derivatives of azolotriazines and azolopyrimidines with antiviral activity towards magnesium ions. The turbidimetric method was used. During the experiment, the coefficients of the complexing activity of the reviewing substances in a certain concentration were calculated; conclusions about the significance of the measurements were made.В статье изложены результаты исследования комплексообразующих свойств по отношению к ионам магния производных азолотриазинов и азолопиримидинов, обладающих противовирусной активностью. В работе использовался турбидиметрический метод. В ходе эксперимента были вычислены коэффициенты комплексообразующей активности исследуемых веществ заданной концентрации, сделаны выводы о значимости полученных измерений

Comparative evaluation of iodine content in products for the prevention, treatment of complications tooth extraction

A comparative study of the dynamics of desorption of iodine from drugs containing iodoform and tooth extraction used after surgery. This took into account the type and form of drugs. The content and desorption of iodine determine the duration of the local effect of the drug on the tissue of the tooth hole.Проведено сравнительное исследование динамики десорбции йода из лекарственных препаратов, содержащих йодоформ и применяемых после операции удаления зуба. При этом учитывались вид и форма лекарственных препаратов. Содержание и десорбция йода определяют длительность местного воздействия лекарственного препарата на ткани лунки зуба

The role of magnesium in prevention of children urolithiasis

According to the literature, various calcium compounds are presented in the composition of kidney stones, one of the most wide spread ones is calcium oxalate, however there are not any magnesium compounds among them. This article deals with an experimental study that reveals the possible mechanisms of this regularity. The obtained experimental data may be used in clinical practice to diagnose urolithiasis and to recognize metaphylaxis of this disease.По данным литературы известно, что в составе почечных камней присутствуют различные соединения кальция, преобладающим из которых является оксалат кальция, однако среди данных соединений отсутствуют соединения магния. В данной статье представлено экспериментальное исследование, которое раскрывает возможные механизмы этой закономерности. Полученные экспериментальные данные могут быть использованы в клинической практике с целью диагностики и метафилактики мочекаменной болезни

Investigation of physico-chemical properties of drugs iron (III) hydroxide polymaltosate and iron protein succinylate

The purpose of the study is to study the physico-chemical properties of M iron (III) hydroxide polymaltosate and iron protein succinylate, such as the ability to dissociate, the hydrogen pH in various aqueous solutions, redox properties.Цель исследования – изучение физико-химических свойств ЛП железа (III) гидроксид полимальтозат и железа протеин сукцинилат, таких как способность к диссоциации, водородного показателя рН в различных водных растворах, окислительно-восстановительных свойств

The effect of halogenes to the physical and chemical characteristics of the “Ca2+ - PO4 3¯ - H2O” heterogeneous system

The enamel has a porous structure which interacts with an oral fluid. Therefore, the state of heterogeneous equilibrium in the “Ca2+ - PO4 3¯ - H2O” system determines the physicochemical characteristics of enamel. The shift of heterogeneous equilibrium to the formation of a coarsely dispersed system was determined by the decreasing of light transmission. In the model system the effect of halogens such as: fluorine, chlorine, bromine, iodine to the formation of a coarsely dispersed phase was evaluated. It has been established that fluorine ions contribute to the forced formation of a coarsely dispersed system. Besides, iodine or bromine ions do not contribute to the formation of a solid phase.Эмаль имеет пористую структуру и находится во взаимодействии с ротовой жидкостью, поэтому состояние гетерогенного равновесия в системе “Ca2+ - PO4 3¯ - H2O” определяет физико-химические свойства эмали. Смещение гетерогенного равновесия в сторону формирования грубодисперсной системы определяли по снижению величины светопропускания. В модельной системе оценивали влияние галогенов (фтора, хлора, брома, йода) на формирование грубодисперсной фазы. Установлено, что ионы фтора способствует форсированному образованию грубодисперсной системы, а ионы йода или брома не способствуют образованию твердой фаз

Adsorption capacity of some food products and sorbents in relation to lead compounds

The purpose of the study is to evaluate the adsorption capacity of some food products in relation to lead compounds and compare it with the adsorption activity of known sorbents.Цель исследования - оценить адсорбционную способность некоторых продуктов питания по отношению к соединениям свинца и сопоставить c адсорбционной активностью известных сорбентов

Investigation of mechanical properties of cold-rolled, annealed and welded semi-finished products from the test alloys of Al-Mg system, economically alloyed with scandium

The results of experimental investigation of mechanical properties of sheet metal from an experimental aluminum alloys Al–Mg system alloyed with scandium have been represented. It was established that the deformed and annealed semi-finished products of these alloys have higher strength properties. Testing of welded samples made from these semi-finished products showed high corrosion resistance and strength of welded joints

Evaluation of completing properties of aqueous solutions of glutamic asid with respect to Iroi (III) and copper (II)

The authors attempted to justify the negative effect in the form of reducing hemoglobin in patients from using of glutamic acid as a drug by its complexation with iron (III) and copper (II).Цель работы: оценить комплексообразующие свойства водных растворов глутаминовой кислоты по отношению к катионам Fe³⁺, Сu²⁺

Investigation of the structure and properties of cold-rolled strips from experimental alloy 1580 with a reduced scandium content

The structure and properties of cold-rolled strips with a thickness of 3 mm from an experimental aluminum alloy 1580 with a lower scandium content of 0.03% (wt.) relative to the grade of the aluminum alloy and a 5083 similar alloy without scandium were studied. Ingots obtained at the laboratory installation of semi-continuous casting of the Foundry department of the Siberian Federal University (Siberian Federal University, Russia, Krasnoyarsk) were used. The preparation of ingots for rolling included milling up to sizes 40×100×145 mm and annealing according to a two-stage mode: at a temperature of 350 °C for 3 hours (first stage) and at a temperature of 425 °C for 4 hours (second stage). Hot rolling was carried out in the laboratory of the Department of Metal Forming at the Siberian Federal University at a temperature of 450 °C on a two-roll hot rolling mill with a roll diameter of 330 mm and a barrel length of 520 mm to a thickness of 5 mm, which corresponded to a total reduction of 88% with a single reduction of 2-5%. For cold rolling, a two-roll sheet rolling mill with a roll diameter of 200 mm and a barrel length of 400 mm grade LS 400 AUTO was used. Rolling was carried out to a thickness of 3 mm with a single reduction of 2-5%, and then the strip was annealed. The results of determining the mechanical properties by tension by the universal LFM400 machine showed that with an increase in the annealing temperature in the range from 250 to 350 °C for 3 hours, ultimate tensile strength of the cold-rolled strips of aluminum alloy 1580 decreases from 385 to 365 MPa. For aluminum alloy 5083, a decrease in this strength characteristic is also observed from 345 to 320 MPa. A decreasing tendency with increasing annealing temperature was also observed for the conditional yield strength Rp, and over the entire range of annealing temperatures, the values of Rp for strips of alloy 1580 were higher than for alloy 5083 by 35-40 MPa, which amounted to 14-17% The values of the plastic properties, for which the value of the elongation to failure was analyzed, were close throughout the range of annealing temperatures for both alloys. The results of the analysis of micro- and fine structure allowed to conclude that an increase in the strength properties of cold-rolled and annealed sheets from the experimental alloy 1580, compared with alloy 5083, is a consequence of the addition of scandium in the experimental alloy 1580, which leads to an increase in the temperature of recrystallization of the alloy, preserving it contains a subgrain structure and dispersion hardening caused by precipitation of Al3(Sc, Zr) phase particles during decomposition of a solid solution