Results of hydraulic calculations of the Chernozemelskaya irrigation system channels

Purpose: hydraulic calculations of the current water supply network of the Chernozemelskaya irrigation system channels. Materials and methods. The materials for the calculations were: operational records of the Chernozemelskaya irrigation system, the results of field surveys of channels and data from instrumental measurements of water levels, velocities and water discharges in the surveyed discharge section lines of distributary channels. The field work was carried out according to the generally accepted rules and methods of surveys, hydrometric measurements and assessment of the reclamation facilities state. Channel hydraulic calculations were performed for the conditions of constant water flow in their channels on rectilinear sections. Calculations of the main elements of the water cross-section of the Chernozemelskaya irrigation system channels were carried out using passport data and the results of field surveys of these channels. Results. Calculations of the main elements of the water cross-section of the channels for the control stations on the Yashkul and Gashun distribution canals of the Chernozemelskaya irrigation system were performed, rating curves of discharge and average water flow velocity in channels from the depth of their filling were constructed; permissible (non-eroding and non-silting) velocities of water flow in the channels were determined. Conclusions. It was found for the discharge section line on the Gashun distribution canal, that siltation of the channel will occur at a water flow discharge of Q < 2.75 m³/s and channel filling of h < 1.0 m. When assessing the channel of the Gashun canal for the susceptibility to erosion, it was determined that the channel in the control station section can pass the specified discharge without being eroded. Checking the channel of the Yashkul distribution canal in the control section for siltation and erosion showed that its channel will not be eroded in the considered range of water flow velocities from 0.62–1.14 m/s

Solution combustion synthesis of α-Al2O3 using urea

The processes involved in the solution combustion synthesis of α-Al2O3 using urea as an organic fuel were investigated. The data describing the influence of the relative urea content on the characteristic features of the combustion process, the crystalline structure and the morphology of the aluminium oxide are presented herein. Our data demonstrate that the combustion of stable aluminium nitrate and urea complexes leads to the formation of α-alumina at temperatures of approximately 600-800 °C. Our results, obtained using differential thermal analysis and IR spectroscopy methods, reveal that the low-temperature formation of α-alumina is associated with the thermal decomposition of an α-AlO(OH) intermediate, which was crystallised in the crystal structure of the diaspore. © 2012 Elsevier Ltd and Techna Group S.r.l

Селекция гибридов партенокарпического огурца для необогреваемых теплиц

Relevance. Cucumber is very popular and in demand in households of the population (personal subsidiary farms), as evidenced by the data on the acreage occupied under this crop in the territory of the Russian Federation (37.4 thousand hectares).Methodology. This article presents the results of evaluating the combinational ability of eight parthenocarpic inbreeding lines and testing thirteen new hybrid combinations obtained on the basis of the studied lines under the conditions of spring-summer turnover in a polycarbonate unheated greenhouse in the Moscow region in comparison with the hybrids F1 SV 4097 CV (Seminis, the Netherlands) and F1 Piligrim (Agrofirma Poisk LLC, Russia).The purpose of the scientific work is to develop productive and high-yielding heterotic cucumber hybrids with a complex of economically useful traits for cultivation in unheated greenhouses. Testing and introduction of competitive and technologically advanced hybrids into commercial vegetable production is one of the important stages of scientific research in the field of breeding. The research was carried out in ARRIVG – a branch of FSBSI “Federal Scientific Vegeculture Center” in the conditions of polycarbonate unheated ground greenhouses during 2020-2021 (Moscow region, Ramensky district).Results. As a result of evaluation of the combinational ability of parthenocarpic inbreeding lines, it was found that inbreeding lines L.21 (2.4 kg/m2 ), L.415 (0.8 kg/m2 ), L.993 (0.4 kg/m2 ), L.1010 (0.1 kg/m2 ) should be used during hybridization as a paternal component for obtaining early-ripening parthenocarpic cucumber hybrids. To develop more productive and high-yielding parthenocarpic cucumber hybrids, inbreeding lines L.21, L.415, L.1008 should be used. As a result of the research work, four hybrid combinations (L.993×L.415, L.1010×L.21, L.993×L.21, L.993×L.1008) were identified for high yield and productivity in protected soil conditions, which exceeded the standards of SV 4097 CV F1 and Piligrim F1. Актуальность. Огурец очень популярен и востребован в хозяйствах населения (ЛПХ) о чем свидетельствуют данные о посевных площадях занимаемые под этой культурой на территории РФ (37,4 тыс.га).Материал и методы. Приведены результаты оценки комбинационной способности восьми инцухт-линий партенокарпического типа и испытания тринадцати новых гибридных комбинаций, полученных на базе изученных линий, в условиях весенне-летнего оборота в поликарбонатной необогреваемой грунтовой теплице Московской области, в сравнении с гибридами F1 SV 4097 CV (Seminis, Нидерланды) и F1 Пилигрим (ООО «Агрофирма Поиск», РФ).Цель научной работы – создание продуктивных и высокоурожайных гетерозисных гибридов огурца с комплексом хозяйственно полезных признаков для возделывания в необогреваемых теплицах. Испытание и внедрение конкурентоспособных и технологичных гибридов в товарное производство овощной продукции является одним из важных этапов научных исследований в области селекции. Исследования проводили во ВНИИО – филиале ФГБНУ ФНЦО в условиях поликарбонатных необогреваемых грунтовых теплиц в течение 2020-2021 годов (Московская область, Раменский район).Результаты. В результате оценки комбинационной способности партенокарпических инцухтлиний установлено, что в качестве отцовского компонента для получения скороспелых и раннеспелых партенокарпических гибридов огурца следует использовать при гибридизации инцухт-линии Л.21 (2,4 кг/м2 ), Л.415 (0,8 кг/м2 ), Л.993 (0,4 кг/м2 ), Л.1010 (0,1 кг/м2 ). Для создания более продуктивных и высокоурожайных партенокарпических гибридов огурца следует использовать инцухт-линии Л.21, Л.415, Л.1008. В результате исследовательской работы выделены по высокой урожайности и продуктивности растений в условиях защищенного грунта четыре гибридные комбинации (Л.993×Л.415, Л.1010×Л.21, Л.993×Л.21, Л.993×Л.1008), которые превзошли стандарты SV 4097 CV F1 и Пилигрим F1.

Crystal and Electronic Structures of Alluaudite-Type Double Molybdates of Scandium and Indium

Double molybdates of indium and scandium with alluaudite structure are prepared by the solid-phase synthesis method. The crystal structure of the indium containing compound is refined and optical characteristics of Na5R(Mo04)4(R = Sc, In) are determined. Electronic structures of Na5R(Mo04)4(R = Sc, In) molybdates are studied within the ab initio method taking account of Na/Sc(In) positional disordering. Calculations of the imaginary part of dielectric function predict the optical gap of ~3.8 eV, in accordance with absorption spectroscopy data. It is established that formation energy of sodium vacancies strongly depends on sodium position and Sc(In) concentration. As a result, various diffusion mechanisms may be activated in alluaudite-type compounds with high and low contents of metal R. © 2019, Pleiades Publishing, Ltd

SYNTHESIS OF NEW PHOSPHORS BASED ON Tm3+, Nd3+ OR Ho3+ DOPED GERMANATES BY “WET” CHEMICAL ROUTES

Various “wet” synthetic chemical techniques are widely used for the production of multifunctional inorganic materials. In contrast to the standard high-temperature solid state route, methods based on the dissolution of starting reagents allow one to obtain phases with given particle morphology and particle size distribution. Besides, with this approach, the defect structure can be efficiently controlled by varying the synthesis conditions and solution preparation. These advantages are important for producing luminescent materials.This work was supported by the Russian Science Foundation, project № 16-13-10111