On the possibility of the reaction (CuMoO4 + C), using the apparent activation energy method

This article discusses the calculation of the apparent activation energy (CuМоO4 + C) on the DTA (Differential Thermal Analysis) curve, to study and optimize the time-temperature synthesis mode, in particular, the activation energy. Activation energy allows us to investigate the elementary act of chemical interaction. Thus, we propose to use this method to calculate the interaction of Eact (CuМоO4 + C) in the solid phase of hardening occurring during synthesis. These results allow us to trace how much energy is expended to start the reaction

Multi-transition study and new detections of class II methanol masers

We have used the ATNF Mopra antenna and the SEST antenna to search in the directions of several class II methanol maser sources for emission from six methanol transitions in the frequency range 85-115 GHz. The transitions were selected from excitation studies as potential maser candidates. Methanol emission at one or more frequencies was detected from five of the maser sources, as well as from Orion KL. Although the lines are weak, we find evidence of maser origin for three new lines in G345.01+1.79, and possibly one new line in G9.62+0.20. The observations, together with published maser observations at other frequencies, are compared with methanol maser modelling for G345.01+1.79 and NGC6334F. We find that the majority of observations in both sources are consistent with a warm dust (175 K) pumping model at hydrogen density ~10^6 cm^-3 and methanol column density ~5 x 10^17 cm^-2. The substantial differences between the maser spectra in the two sources can be attributed to the geometry of the maser region.Comment: 13 pages, 6 figures, Accepted for publication in MNRA

On the possibility of the reaction (CuMoO4 + C), using the apparent activation energy method

This article discusses the calculation of the apparent activation energy (CuМоO4 + C) on the DTA (Differential Thermal Analysis) curve, to study and optimize the time-temperature synthesis mode, in particular, the activation energy. Activation energy allows us to investigate the elementary act of chemical interaction. Thus, we propose to use this method to calculate the interaction of Eact (CuМоO4 + C) in the solid phase of hardening occurring during synthesis. These results allow us to trace how much energy is expended to start the reaction

Бонитировка почв Гянджа-Казахского кадастрового района Азербайджанской Республики

The solution to many national economic problems to a certain extent depends on the rational use of soil resources. Their qualitative and quantitative accounting is the basis for the economic evaluation of the land as a result of which it is possible to provide an objective basis for solving the issues of rational use of land on the most comprehensive and wide scale. A qualitative assessment of agricultural land is relevant and necessary for the dry-steppe Ganja-Kazakh zone with intensive agricultural production and unstable natural landscape complexes. The authors conducted soil and field studies to solve the problem in 2018–2020. The authors also laid 32 soil profiles and conducted laboratory analyzes of soil samples taken from them. In the course of the study, soil data were collected and processed from stock materials. The authors of the article conducted a qualitative assessment of the lands of the Ganja-Kazakh cadastral region and compiled the main scale of their bonitet based on the methodological recommendations of I.I. Karmanova, F. Ya. Gavrilyuk, G.Sh. Mammadov. As a standard, mountain brown soils were taken, relative to which the ranking of the yield of other lands was made. The authors used correction factors for the degree of salinity, alkalinity, erosion, and the level of soil cultivation to calculate the quality score of soil varieties. The main, detailed, and final bonitet scales were compiled, and the weighted average scores and the coefficient of comparative dignity of the land quality of a given territory were calculated. According to the results of calculations, the authors found that the dark gray-brown soils of the Ganja-Kazakh cadastral region have the highest level of crop-producing power which is estimated at 93 points, and alluvial-meadow-forest soils are among the soils with the lowest level of crop-producing power - 33 points. The weighted average quality score of the lands in this area was 59 points.Решение многих народно-хозяйственных задач в известной степени зависит от рационального использования почвенных ресурсов. Качественный и количественный их учет является основой экономической оценки земель, в результате чего создается возможность дать объективную основу для решения вопросов рационального использования земель в наиболее комплексном и широком масштабе. Для сухостепной Гянджа-Казахской зоны с интенсивным сельскохозяйственным производством и неустойчивыми природно-ландшафтными комплексами качественная оценка земель сельскохозяйственного назначения является актуальной и необходимой. Для решения поставленной задачи в 2018–2020 гг. были проведены почвенно-полевые исследования, заложены 32 разреза почв, проведены лабораторные анализы отобранных из них почвенных образцов, собраны и обработаны почвенные данные из фондовых материалов. На основе методических рекомендаций И.И. Карманова, Ф. Я. Гаврилюка, Г.Ш. Мамедова проведена качественная оценка земель Гянджа-Казахского кадастрового района и составлена основная шкала их бонитета. В качестве эталона взяты горно-коричневые почвы, относительно которых произведено ранжирование бонитета остальных земель. Для расчёта определения балла бонитета почвенных разновидностей использовали поправочные коэффициенты на степень их засоленности, солонцеватости, эродированности, уровень окультуренности и т.д. Были составлены основная, развернутая и итоговая бонитетные шкалы, рассчитаны средневзвешенные баллы и коэффициент сравнительного достоинства качества земель данной территории. По результатам расчетов было установлено, что темно-серо-коричневые почвы ГянджаКазахского кадастрового района обладают самым высоким уровнем плодородия, оцениваемым в 93 балла, а аллювиально-лугово-лесные почвы относятся к почвам с самым низким уровнем плодородия – 33 балла. Средневзвешенный бонитетный балл земель данного района составил 59 баллов

Research of the Additional Losses Occurring in Optical Fiber at its Multiple Bends in the Range Waves 1310nm, 1550nm and 1625nm Long

Article is devoted to research of the additional losses occurring in the optical fiber at its multiple bends in the range waves of 1310 nanometers, 1550 nanometers and 1625 nanometers long. Article is directed on creation of the external factors methods which allow to estimate and eliminate negative influence. The automated way of calculation of losses at a bend is developed. Results of scientific researches are used by engineers of "Kazaktelekom" AS for practical definition of losses service conditions. For modeling the Wolfram|Alpha environment - the knowledge base and a set of computing algorithms was chosen. The greatest losses are noted on wavelength 1310nm and 1625nm. All dependences are nonlinear. Losses with each following excess are multiplicative

The development and analysis of the machining attachments for the decrement of oscillations of a boring bar in the process of the refinement of high-accuracy apertures

Technological patterns in the formation of deflections in shape and positioning of apertures in the process of boring are established on the basis of theoretical and experimental analysis. The dominant factors that influence the formation of processing errors were brought to light, taking into account the specificity of the application of PNC machines (programmed numeral control) and specific automatic control systems that position the shape-forming point of a cutting tool by means of the decrement of its oscillations in the process of aperture boring. The need for and possibility of the control of the process of shape formation under boring have been shown, which fundamentally allows to increase the refinement accuracy and to decrease errors in positioning and roughness of the processed surfaces

Power supply of autonomous systems using solar modules

The article shows the methods of constructing autonomous decentralized energy systems from solar modules. It shows the operation of up DC inverter. It demonstrates the effectiveness of DC inverters with varying structure. The system has high efficiency and low level of conductive impulse noise and at the same time the system is practically feasible. Electrical processes have been analyzed to determine the characteristics of operating modes of the main circuit elements. Recommendations on using the converters have been given

A search for 85.5- and 86.6-GHz methanol maser emission

We have used the Australia Telescope National Facility Mopra 22m millimetre telescope to search for emission from the 85.5-GHz and 86.6-GHz transitions of methanol. The search was targeted towards 22 star formation regions which exhibit maser emission in the 107.0-GHz methanol transition, as well as in the 6.6-GHz transition characteristic of class II methanol maser sources. A total of 22 regions were searched at 85.5 GHz resulting in 5 detections, of which 1 appears to be a newly discovered maser. For the 86.6-GHz transition observations were made of 18 regions which yielded 2 detections, but no new maser sources. This search demonstrates that emission from the 85.5- and 86.6-GHz transitions is rare. Detection of maser emission from either of these transitions therefore indicates the presence of special conditions, different from those in the majority of methanol maser sources. We have observed temporal variability in the 86.6-GHz emission towards 345.010+1.792, which along with the very narrow line width, confirms that the emission is a maser in this source. We have combined our current observations with published data for the 6.6-, 12.1-, 85.5-, 86.6-, 107.0-, 108.8- and 156.6-GHz transitions for comparison with the maser model of Sobolev & Deguchi (1994). This has allowed us to estimate the likely ranges of dust temperature, gas density, and methanol column density, both for typical methanol maser sources and for those sources which also show 107.0-GHz emission.Comment: 11 pages, accepted for publication in MNRAS, Latex, mn2e.cl