Simulation of viscous melt drop crystallization by the SPH method

Heat and mass transfer during absorption on a film of lithium bromide water solution flowing by a cooled wall in the steam atmosphere is numerically investigated in this paper. The self-similar solutions are using as the initial conditions for solving the problem beyond the entrance region. The key criteria characterizing heat and mass transfer in the film absorption with uniform velocity profile and with a constant thickness have been determined

Ceramics based on titanium nitride and silicon nitride sintered by SPS-method

The dependences of the microstructure and physical and mechanical properties of ceramic mixtures Si[3]N[4]/TiN in the full range of mass ratios of the components. Was also investigated directly, and the process of sintering occurring during a physical or chemical processes, in particular, has been obtained and the hardness of the material density on the ratio of the conductive titanium nitride phase and a silicon nitride insulating phase with values above and below the percolation threshold. Also obtained was pure ceramics based on titanium nitride with high physical-mechanical characteristics (H=21.5 GPa)

CSF Bypass Surgery in Children with Hydrocephalus: Modern Possibilities, Prospects and Ways of Solving the Correction of Complications

The chapter discusses modern and promising approaches to the use of CSF shunting operations in children. CSF shunting operations remain the only effective method for correcting persistent CSF circulation disorders in CSF resorption disorders with the development of intracranial hypertension and hydrocephalus. The chapter is devoted to general ideas about CSF dynamics and biomechanical properties of the craniospinal system that affect CSF dynamics, and gives a pathogenetic assessment of CSF dynamics in the development of intracranial hypertension and hydrocephalus. Aspects of genetics and genomics of anomalies in hydrocephalus are touched upon. Pathological changes in the brain around old ventricular shunts are described. The authors consider the types of CSF shunting operations for hydrocephalus in children. Possible complications of CSF shunting operations are analyzed with the algorithm for their correction and management tactics for this group of patients

Electrochemical Synthesis of Zirconium Pre-Catalysts for Homogeneous Ethylene Oligomerization

The catalytic activity of electrochemically synthesized zirconium carboxylates was studied in the process of ethylene oligomerization. Zirconium carboxylates were electrochemically synthesized directly from metallic zirconium and corresponding carboxylic acids (acetic, octanoic and lauric). A comprehensive study (element analysis, nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy, powder X-ray diffraction (PXRD)) of the synthesized zirconium carboxylates showed that these species contain bidentate carboxylate moieties. It was shown that obtained zirconium carboxylates, in combination with Et3Al2Cl3 (Al/Zr = 20), have a moderate activity of (7.6-9.9) × 103 molC2H4⋅molZr-1⋅h-1 in terms of ethylene oligomerization (at T = 80 ?C, p = 20 bar), leading to even-numbered C4-C10 linear alpha-olefins.1059-105

Моделирование функциональных кист яичников путем введения фолликулостимулирующего гормона

Aim. To study the morphofunctional state of ovaries after the introduction of recombinant FSH. Materials and methods. Two groups of mature female Wistar rats were used in the study. The experimental group consisted of 35 rats with a model of follicular ovarian cysts, while 25 rats were in the control group.Rats were taken out of the experiment on days 3, 7, 15, 30 and 60. Paraffin slides of ovaries were stained with hematoxylin and eosin by Van Gieson. Histological and morphometric investigations were performed.Results. On day 7 of FSH administration, the maximum increase in the size of the ovaries was observed due to the formation of single-cell follicular cysts. Rats in the experimental group showed a marked decrease in the number of growing follicles on day 7 and 15. The increase in atretic bodies and follicles in comparison with the control group was observed on day 7 and lasted until the end of the experiment. Additionally, on day 7 of the experiment, hyperemia and vasoconstriction were noted. The number of yellow bodies decreased during the experiment, and an increase in collagen formation occurred starting from day 15 of the experiment.Conclusion. The introduction of follicle-stimulating hormone for 7 days leads to disruption of folliculogenesis, strengthening of atresia in the ovaries, and the formation of functional cysts.Цель исследования. Изучить морфологические изменения яичников при введении рекомбинантного фолликулостимулирующего гормона.Материал и методы. Эксперимент проведен на половозрелых белых самках крыс линии Wistar. Основную группу составили 35 животных с моделью функциональных кист яичников, контрольную – 25 интактных животных. Крысы выводились из эксперимента на 3-и, 7-е, 15-, 30- и 60-е сут. Проведены гистологическое и морфометрическое исследования на депарафинированных срезах яичников, окрашенных гематоксилином и эозином и по Ван Гизону.Результаты. На 7-е сут введения фолликулостимулирующего гормона наблюдалось максимальное увеличение размеров яичников за счет формирования однокамерных функциональных кист. У животных основной группы отмечалось выраженное снижение количества растущих фолликулов на 7- и 15-е сут.Увеличение количества атретических фолликулов и тел по сравнению с таковым в группе контроля наблюдалось с 7-х сут и продолжалось до 60-х сут эксперимента. На 7-е сут эксперимента отмечались гиперемия и полнокровие сосудов. Количество желтых тел уменьшалось в ходе эксперимента. Отмечалось усиление процессов коллагенообразования, начиная с 15-х сут эксперимента.Заключение. Введение фолликулостимулирующего гормона в течение 7 сут приводит к нарушению процессов фолликулогенеза, усилению процессов атрезии в яичниках и формированию функциональных кис

Assessment of juvenile resistance of barley and wheat accessions to dark brown leaf spot

Dark brown leaf spot of cereal crops caused by the Bipolaris sorokiniana fungus causes significant crop losses worldwide. To create new resistant varieties, it is necessary to use sources with a high level of resistance. In the laboratory of physiology and biotechnology of the Krasnoyarsk Research Institute of Agriculture, the juvenile resistance of the breeding material of spring barley and spring soft wheat of competitive variety testing to dark brown spot was evaluated. The most toxigenic isolates of Bipolaris sorokiniana were preliminarily selected for the production of inoculum, which was used to treat horizontally placed seedlings of the studied cereal samples in the 1-2 leaf phase. The development of the disease was assessed on a scale from 0 to 6. The sources of resistance included highly resistant samples, the damage of which did not exceed 2 points. These are samples of spring barley V19-6718, V21-6723, B25-6260, B33-6315, V33-6767, V34-6713, V40-6828, K-91-2, K104-1, S-106, K-134- 3 and spring soft wheat Altaiskaya 75, K-613-2, K-654-1, K-229-9, K-693-2, K-780-1, K-696-7, KSI-10, of interest for selection for fungal diseases