КАЧЕСТВЕННЫЕ ПОКАЗАТЕЛИ СЕМЯН МОНАРДЫ ЛИМОННОЙ ДЛЯ РАЗРАБОТКИ СТАНДАРТА

Purple horsemint (Monarda citriodora L.) is a perennial plant belonging to Lamiaceae family and being cultivated as aromatic and ornamental crop in many countries of Europe and America. Last years this plant actively gains popularity among gardeners. To elaborate the standard of organization with title 'Seeds of Monarda citriodora L. Sowing qualities. Technical conditions' the basis data has been collected from laboratory of leafy, aromatic, scented and ornamental plant breeding, laboratory of stardatization, rationing and metrology at VNIISSOK. The standard for seeds of Monarda citriodora L.includes the following sections: field of utilization; normative references; terms, definition, abbreviation, classification; technical requirements; order for receiving and sample piking;method of control; transportation and storage; security requirements.Монарда лимонная (Monarda citriodora L.) – многолетнее травянистое растение семейства Яснотковые, выращиваемое в культуре как пряно-ароматическое, декоративное растение во многих странах Европы и Америки. В последние годы активно завоевывает популярность у российских огородников. При разработке стандарта организации «Семена монарды лимонной. Сортовые и посевные качества. Технические условия», за основу взяты данные, полученные лабораториями: зеленных, пряно-вкусовых и цветочных культур; стандартизации нормирования и метрологии ВНИИССОК. Стандарт на семена монарды лимонной включает следующие разделы: область применения; нормативные ссылки; термины, определения и сокращения; классификация; технические требования; правила приемки и отбор проб; метод контроля; транспортирование и хранение; требование безопасности

Interdisciplinary project-based learning: technology for improving student cognition

The article studies a way of enhancing student cognition by using interdisciplinary project-based learning (IPBL) in a higher education institution. IPBL is a creative pedagogic approach allowing students of one area of specialisation to develop projects for students with different academic profiles. The application of this approach in the Ural State University of Economics resulted in a computer-assisted learning system (CALS) designed by IT students. The CALS was used in an analytical chemistry course with students majoring in Commodities Management and Expertise (‘expert’ students). To test how effective the technology was, the control and experimental groups were formed. In the control group, learning was done with traditional methods. In the experimental group, it was reinforced by IPBL. A statistical analysis of the results, with an application of Pearson χ 2 test, showed that the cognitive levels in both IT and ‘expert’ experimental groups improved as compared with the control groups. The findings demonstrated that IPBL can significantly enhance learning. It can be implemented in any institution of higher or secondary education that promotes learning, including the CALS development and its use for solving problems in different subject areas

SEED QUALITY PARAMETERS OF PURPLE HORSEMINT FOR ELABORATION OF STANDART

Purple horsemint (Monarda citriodora L.) is a perennial plant belonging to Lamiaceae family and being cultivated as aromatic and ornamental crop in many countries of Europe and America. Last years this plant actively gains popularity among gardeners. To elaborate the standard of organization with title 'Seeds of Monarda citriodora L. Sowing qualities. Technical conditions' the basis data has been collected from laboratory of leafy, aromatic, scented and ornamental plant breeding, laboratory of stardatization, rationing and metrology at VNIISSOK. The standard for seeds of Monarda citriodora L.includes the following sections: field of utilization; normative references; terms, definition, abbreviation, classification; technical requirements; order for receiving and sample piking;method of control; transportation and storage; security requirements

Seed pre-treatment of grain and vegetable crops by microwave energy

Systematic joint studies being done in laboratory and field conditions, enabled to develop a scientific concept of microwave energy influence on the rate of growth of grain crops under a considerable reduction of chemical reactants. A model is developed that explains the effect of intensity and duration of microwave energy impact on the change of germination energy, germinating ability and productivity of grain crops using an example of successive changes in the chain of associated water - amylase - maltose - glucose depending upon the initial grain moisture content. A method of seed treatment of vegetable crops has been developed which ensures the rate of growth, which is important for vegetable farming in greenhouses. Results of increasing germinating ability of melon seeds from 10% to 83% after microwave effect are of practical interest

La2Zr2O7/LaAlO3 composite prepared by mixing precipitated precursors: Evolution of its structure under sintering

For La2Zr2O7/LaAlO3 composite prepared by aging (100 °C/10 h) of the mixture of precipitated precursors of La-Zr-O and La-Al-O, evolution of its structural features after sintering in air in the range of 100–1300 °C was investigated by applying XRD, HRTEM, FTIR, Raman and UV–Vis spectroscopies, 27Al MAS NMR and 139La NMR. The initial composite forms a highly dispersed and disordered structure retaining considerable concentrations of residual anions (anions from the initial salts, water molecules and hydrogen bound hydroxyls) due to basic properties of La cations. Stepwise removal of these anions by calcinations results in the crystallization of La2(Al)O2CO3 at 500 °C with complete disordering of the system after heating at 700 °C. These transitions are accompanied by appearance of AlO4 polyhedra. The La-Zr-O- containing phase appeared for the first time at 900 °C as fluorite-like ZrO2 stabilized by La (Al) cations, and LaAlO3 (P2) phase is also observed along with admixtures of La2O3 and La10Al4O21. At 1100 °C fluorite-like ZrO2 converts into the La2Zr2O7 (P1) phase, and in the range of 1100–1300 °C mixed P1 and P2 oxides are the main phases. For P1 phase, structure becomes more ordered at higher sintering temperatures, while for P2 phase in composite the nanodomain structure is still observed in comparison with individual mixed oxide at 1300 °C. The molecular –scale features of domain boundaries in nanostructured La-Zr-O/La-Al-O composite as well as applied inexpensive method of its fabrication provide required bases for a broad practical application of this material for Thermal barrier coatings (TBCs). © 2020 Elsevier B.V

Mathematical model of electrical and magnetic component of the field radiation of elements by a convex antenna array

У статті розроблено математичну модель електричної і магнітної складових поля випромінювання елементів опуклої антенної решітки. Отримані вирази дозволяють побудувати алгоритми чисельного моделювання поля випромінювання опуклої антенної решітки в далекій, проміжній та ближній зоні. Під час розробки математичної моделі вважалося, що внутрішня задача для кожного з диполів, що входять в опуклу антенну решітку вирішена і розподіл струмів в них знайдено. Причому залежність комплексної амплітуди струму від часу вважається гармонійною. Наведені в статті математичні вирази можуть бути покладені в основу методу аналізу характеристик спрямованості тривимірних моделей опуклої антенної решітки в далекій, проміжній та ближній зоні.В статье разработана математическая модель электрической и магнитной составляющих поля излучения элементов выпуклой антенной решетки. Полученные выражения позволяют построить алгоритмы численного моделирования поля излучения выпуклой антенной решетки в дальней, промежуточной и ближней зоне. При разработке математической модели считалось, что внутренняя задача для каждого из диполей, входящих в выпуклую антенную решетку решена и распределение токов в них найдено. Причем зависимость комплексной амплитуды тока от времени будем считать гармонической. Приведенные в статье математические выражения могут быть положены в основу метода анализа характеристик направленности трехмерных моделей выпуклой антенной решетки в дальней, промежуточной и ближней зоне.Analyzing the basic methods and features of determining the directional characteristics of axis-symmetric antenna arrays, which include convex antenna arrays, in the near, far and intermediate zones, distinguish a number of their differences from the directional characteristics of flat antenna arrays. These differences are mainly due to the fact that in determining the directional characteristics, axisymmetric antenna arrays should be considered as a system of extraneous non-collinear electric (magnetic) currents on the convex surface of the antenna. The application of this approach requires the use of the basics of electrodynamics in solving problems of determining the directional characteristics of such antenna systems. However, the different orientation of the partial radiation patterns of the emitters does not allow the application of the diagram multiplication theorem and the inverse methods of determining the radiation characteristics. In addition, in the known works are not fully represented mathematical models of the fields of elementary sources in the far, intermediate and near areas with respect to convex antenna arrays. The mathematical model of the electric and magnetic components of the radiation field of elements of a convex antenna array is developed. The obtained expressions allow us to construct algorithms for numerical simulation of the radiation field of a convex antenna array in the far, intermediate and near regions. During the development of the mathematical model, it was considered that an internal problem for each of the dipoles entering the convex antenna array was solved and the distribution of currents in them was found. Moreover, the dependence of the complex amplitude of the current on time is considered harmonious. The mathematical expressions given in the article can be the basis for the method of analysis of the directivity characteristics of three-dimensional models of a convex antenna array in the far, intermediate and near regions