Preparation and characterization of Bi26–2xMn2xMo10O69-d and Bi26.4Mn0.6Mo10–2yMe2yO69-d(Me = V, Fe) solid solutions

Received: 06.06.2017; accepted: 23.06.2017; published: 14.07.2017.Single phase samples of bismuth molybdate, Bi26Mo10O69, doped with Mn on the bismuth sublattice and V, Fe on the molybdenum sublattice were found to crystallize in the triclinic Bi26Mo10O69 structure at low doping levels and in the monoclinic Bi26Mo10O69 structure - at higher dopant concentration. The assumption that all Mn ions have an oxidation state of +2 was confirmed by means of magnetic measurement results analysis using Curie-Weiss law. Conductivity was investigated using impedance spectroscopy. The conductivity of Bi26.4Mn0.6Mo9.6Fe0.4O69-d was 1.2*10-2 S*cm-1 at 973 K and 2.2*10-4 S*cm-1 at 623 K, and the conductivity of Bi26.4Mn0.6Mo9.2V0.8O69-d was 2.2*10-3 S*cm-1 at 973 K and 2.2*10-5 S*cm-1 at 623 K

Quantum Interference Effects in Slowly Rotating NUT Space-time

General relativistic quantum interference effects in the slowly rotating NUT space-time as the Sagnac effect and the phase shift effect of interfering particle in neutron interferometer are considered. It was found that in the case of the Sagnac effect the influence of NUT parameter is becoming important due to the fact that the angular velocity of the locally non rotating observer must be larger than one in the Kerr space-time. In the case of neutron interferometry it is found that due to the presence of NUT-parameter an additional term in the phase shift of interfering particle emerges. This term can be, in principle, detected by sensitive interferometer and derived results can be further used in experiments to detect the gravitomagnetic charge. Finally, as an example, we apply the obtained results to the calculation of the UCN (ultra-cold neutrons) energy level modification in the slowly rotating NUT space-time.Comment: 11 pages, 1 figure, accepted for publication in Int. J. Mod. Phys. D; added reference

Behaviour of the Blazar CTA 102 during two giant outbursts

Blazar CTA 102 underwent exceptional optical and high-energy outbursts in 2012 and 2016-2017. We analyze its behaviour during these events, focusing on polarimetry as a tool that allows us to trace changes in the physical conditions and geometric configuration of the emission source close to the central black hole. We also use Fermi gamma-ray data in conjunction with optical photometry in an effort to localize the origin of the outbursts.AST-1615796 - Boston Universit

Peculiaridades do crescimento do ouro-prazer para oleaginosas e seu uso na produção de ração na zona não-chernozem da Rússia

At present, gold-of-pleasure attracts wide attention due to its unpretentiousness and early maturity, high and stable yield. In Russia, edible oils are mainly obtained from sunflower seeds, soybeans, rapeseed and seeds of other oil plants (flax, mustard, castor oil plant and bird rape) and are processed in relatively small amounts. Gold-of-pleasure (Camelina sativa (L.) Crantz) in the Non-Chernozem zone of Russia is not a traditional crop. The expansion of areas for this crop sowing is constrained by the lack of developed recommendations on the technology of its cultivation. This is the basis of the research. The purpose of this experiment was to identify the features of forming gold-of-pleasure productivity and optimizing the main elements of varietal technology (seeding rate and seeding time) in the conditions of the region. The research was carried out at Ryazan State Agrotechnological University, on the experimental fields of the agrotechnological experimental station of Ryazan oblast, on gray forest soils. The object of the research is gold-of-pleasure, variety Yubilyar. It has been revealed that in order to obtain a stable yield of gold-of-pleasure, it is necessary to have at least 420-440 plants per 1 m² to harvest, and 400-450 plants per 1 m² are considered the optimal density. Increasing the seeding rate, above 8 million pcs. of the seeds / ha, led to the formation of a strongly crowded crop, which ultimately contributed to a decrease of the yield and seeds quality. The most optimal seeding rate for gold-of-pleasure is 7.0 million germinated seeds per hectare. The overestimation of the norm to 8.0 million pieces / ha did not significantly increase the yield, but led to an excessive consumption of seeds, deteriorated seed quality, the risk of lodging and diseases. The best seeding time in experiments is the first decade of May.En la actualidad, el oro del placer atrae una amplia atención debido a su falta de pretensiones y madurez temprana, rendimiento alto y estable. En Rusia, los aceites comestibles se obtienen principalmente de semillas de girasol, soja, colza y semillas de otras plantas oleaginosas (linaza, mostaza, aceite de ricino y coles) y se procesan en cantidades relativamente pequeñas. El oro del placer (Camelina sativa (L.) Crantz) en la zona de Non-Chernozem de Rusia no es un cultivo tradicional. La expansión de las áreas para esta siembra de cultivos está limitada por la falta de recomendaciones desarrolladas sobre la tecnología de su cultivo. Esta es la base de la investigación. El propósito de este experimento fue identificar las características de la formación de la productividad del oro del placer y la optimización de los elementos principales de la tecnología varietal (tasa de siembra y tiempo de siembra) en las condiciones de la región. La investigación se llevó a cabo en la Universidad Agrotecnológica Estatal de Ryazan, en los campos experimentales de la estación experimental agrotecnológica de Ryazan oblast, en suelos de bosques grises. El objeto de la investigación es el oro del placer, variedad Yubilyar. Se ha revelado que, para obtener un rendimiento estable de oro de placer, es necesario contar con al menos 420-440 plantas por cosecha de 1 m², y 400-450 plantas por 1 m² se consideran la densidad óptima. Incrementando la tasa de siembra, por encima de 8 millones de pcs. de las semillas / ha, llevó a la formación de un cultivo muy poblado, que en última instancia contribuyó a una disminución del rendimiento y la calidad de las semillas. La tasa de siembra más óptima para el oro del placer es de 7.0 millones de semillas germinadas por hectárea. La sobrestimación de la norma a 8,0 millones de piezas / ha no aumentó significativamente el rendimiento, pero condujo a un consumo excesivo de semillas, deterioro de la calidad de las semillas, el riesgo de alojamiento y enfermedades. El mejor tiempo de siembra en experimentos es la primera década de mayo.No presente, o ouro-do-prazer atrai grande atenção devido à sua despretensão e maturidade precoce, rendimento alto e estável. Na Rússia, os óleos comestíveis são obtidos principalmente a partir de sementes de girassol, soja, colza e sementes de outras plantas oleaginosas (linho, mostarda, mamona e colza) e são processados em quantidades relativamente pequenas. Ouro-do-prazer (Camelina sativa (L.) Crantz) na zona não-Chernozem da Rússia não é uma cultura tradicional. A expansão de áreas para esta semeadura de culturas é limitada pela falta de recomendações desenvolvidas sobre a tecnologia de cultivo. Esta é a base da pesquisa. O objetivo deste experimento foi identificar as características da formação da produtividade de ouro de prazer e otimizar os principais elementos da tecnologia varietal (taxa de semeadura e tempo de semeadura) nas condições da região. A pesquisa foi realizada na Universidade Agrotecnológica do Estado de Ryazan, nos campos experimentais da estação experimental agrotecnológica de Ryazan oblast, em solos de floresta cinza. O objeto da pesquisa é o ouro-do-prazer, variedade Yubilyar. Foi revelado que, para se obter um rendimento estável de ouro-de-prazer, é necessário ter pelo menos 420-440 plantas por 1 m² para a colheita, e 400-450 plantas por 1 m² são consideradas a densidade ideal. Aumentando a taxa de semeadura, acima de 8 milhões de unidades. das sementes / ha, levou à formação de uma cultura fortemente lotada, o que acabou por contribuir para a diminuição do rendimento e qualidade das sementes. A taxa de semeadura mais ideal para o ouro-do-prazer é de 7,0 milhões de sementes germinadas por hectare. A superestimação da norma para 8,0 milhões de peças / ha não aumentou significativamente o rendimento, mas levou a um consumo excessivo de sementes, deterioração da qualidade das sementes, risco de alojamento e doenças. O melhor tempo de semeadura em experimentos é a primeira década de maio

METHOD FOR CALCULATING THE THERMOGAS OUTPUT IN THE TECHNOLOGY OF THERMAL PROCESSING OF SOLID MUNICIPAL WASTE

В работе изложена методика расчёта выхода термогаза в технологии термической переработки твердых коммунальных отходов. В результате проведенных исследований было установлено, что при начальной влажности органического сырья (ОС) W0=28,46 %, все водяные пары будут израсходованы в процессе газификации.The paper describes a methodology for calculating the output of thermogas in the technology of thermal processing of solid municipal waste. As a result of the studies, it was found that with the initial moisture content of organic raw materials W0 = 28.46 %, all water vapor will be consumed in the gasification process

Effect of cystamine on sperm and antioxidant parameters of ram semen stored at 4 °C for 50 hours

Physical and chemical changes caused by oxidative stress in the spermatozoa membrane can reduce spermatozoa function and even lead to death. Cystamine (NH2-CH2-CH2-SH, β-mercaptoethylamine) is a natural substance that modulates the endocrine and metabolic status of animals. This substance has antioxidant and anti-apoptotic effects by inducing intracellular cysteine accumulation. Cystamine is used to treat many diseases despite its many side effects. Sheep semen is sensitive to the stressful condition of chilling storage, which restricts semen storage for artificial insemination in commercial herds. The effect of cystamine on spermatogenesis is not yet fully understood. The present study aimed to investigate the effect of cysteamine addition to the sheep sperm extender during cooling storage on semen quality parameters. Sperm samples were collected from six Edilbayevskaya rams (2 and 3 years old, 70-85 kg). The samples were diluted by extender and supplemented with different concentrations of cysteamine (0, 1, 2, 5, and 10 mM) and cooled to 4ºC for 50 h. Motility parameters, membrane integrity, viability, lipid peroxidation, and mitochondrial activity of cooled semen were evaluated at 0, 25, and 50 h of cooling storage. Although cysteamine failed to affect semen quality at start time (0 hrs), extender supplementation with cysteamine improved sperm total motility, progressive motility, and mitochondrial membrane potential during storage periods (P≤0.01). Moreover, using 1 and 2 mM cysteamine functionally and viably improved (P≤0.01) sperm membrane compared to other treatments. Antioxidant potential (AOP), lipid peroxidation (LPO), and total glutathione (tGSH) (except AOP at 50 h) were significantly different after semen storage at 4 °C. Therefore, levels of AOP and tGSH were significantly increased by using cysteamine. Cysteamine supplementation (1 and 2 mM cysteamine) leads to lower levels of LPO (p<0.01) at 0, 25, and 50 h. Therefore, finding and using the best concentrations of cysteamine in a cooling extender could be effective in saving sheep semen against damages of the cooling storage process

On the formation of AlSiMgCu/quasicrystal powder composite single tracks by selective laser melting

The process of selective laser melting (SLM) of an Al-Si-Mg-Cu powder composite with the addition of quasicrystal reinforcements under conditions of a limited powder amount was investigated. The morphology and microhardness of the obtained scan single tracks were discussed, and the optimal sintering parameters were found to be in the Linear Energy Density (LED) range 0.21-0.30 J/m