Processing of biocompatible materials on a polymer basis by a lowtemperature plasma at atmospheric pressure

In the present work we investigated the effect of low-temperature treatment in the flow of argon on composite materials based on Poly-L-lactide/Hydroxyapatite (PL/HA) in the ratio of 70/30 and hydroxyapatite and lactide and glycolide copolymer (SLG-HA) in the ratio of 10/90. Physical-chemical properties were obtained by investigation of phase state of the modified surface layer by X-ray analysis, chemical composition by IR-spectroscopy, as well as contact angle

Destabilization of cortical dendrites and spines by BDNF

Particle-mediated gene transfer and two-photon microscopy were used to monitor the behavior of dendrites of individual cortical pyramidal neurons coexpressing green fluorescent protein (GFP) and brain-derived neurotrophic factor (BDNF). While the dendrites and spines of neurons expressing GFP alone grew modestly over 24-48 hr, coexpressing BDNF elicited dramatic sprouting of basal dendrites, accompanied by a regression of dendritic spines. Compared to GFP-transfected controls, the newly formed dendrites and spines were highly unstable. Experiments utilizing Trk receptor bodies, K252a, and overexpression of nerve growth factor (NGF) demonstrated that these effects were mediated by secreted BDNF interacting with extracellular TrkB receptors. Thus, BDNF induces structural instability in dendrites and spines, which, when restricted to particular portions of a dendritic arbor, may help translate activity patterns into specific morphological changes

Смешанное обучение английскому языку как форма самостоятельной работы студентов в техническом вузе

Настоящее исследование рассматривает вопросы организации самостоятельной работы студентов по развитию иноязычных монологических умений в условиях смешанного обучения в техническом вузе. В работе проведен анализ трудов зарубежных и отечественных исследователей, занимающихся проблемами смешанного обучения по иностранному языку, что позволило уточнить определение "смешанного обучения", а так же было сформулировано понятие "самостоятельной работы в условиях смешанного обучения". Для развития умений иноязычной монологической речи студентов технического вуза определено содержание обучения, подходы и принципы, разработан комплекс упражнений, размещенный в электронной среде, обеспечивающие реализацию процесса обучения в условиях смешанного обучения.This research deals with the organization of independent work of students, developing their foreign monologue skills in terms of blended learning in a technical university. The analysis of the works of foreign and Russian researchers on blended learning in a foreign language, made it possible to clarify the definition of "blended learning", as well as the formulation of the concept - "independent work in a blended learning". The work describes a pilot training, which proves the efficiency of the developed learning technique of improving students’ foreign monologue skills in a technical university in terms of blended learning

Predicative model for investigation high-temperature evaporation processes of water droplets

A predicative model has been developed to study the processes of high-temperature heating and evaporation of water droplets, taking into account the main interconnected processes of heat transfer and phase transformations. Typical profiles of temperature and velocity in the system "high-temperature gases - a droplet of water" are established when the temperature of the external gas medium varies from 100 to 800 0С. Various statements of the problem are considered, which differ substantially in the type of processes and factors taken into account. The analysis of temperature regimes of heating and evaporation of water droplets is carried out, at which simplified models can be used, and in which all complex interrelated processes of heat and mass transfer (including convective, conductive and radiant heat transfer in droplets, and also in the near-surface vapor-gas layer) need to be taken into account

Исследование влияния криогелей на проведение работ по укреплению грунта при строительстве и реконструкции трубопроводов в условиях Крайнего Севера

Повышение прочностных характеристик грунта откосов и днищ траншей при строительстве и реконструкции трубопроводов в условиях Крайнего Севера. В процессе исследования проводились: анализ существующих методов укрепления грунта, лабораторные испытания прочностных характеристик суглинистого грунта, расчет трубопровода на прочность и устойчивость, Анализ напряженно-деформированного состояния трубопровода в программном комплексе ANSYS.Increase strength characteristics of the soil slopes and bottoms of trenches in the construction and reconstruction of pipelines in the Far North. In the process of research were conducted: analysis of existing methods of soil consolidation, laboratory tests of strength characteristics of loamy soil, calculation of pipeline for strength and stability, Analysis of the stress-strain state of the pipeline in the ANSYS software complex

WU Polyomavirus (WUPyV): A Recently Detected Virus Causing Respiratory Disease?

The WU polyomavirus (WUPyV) is a novel member of the family Polyomaviridae recently detected in respiratory tract specimens by shotgun sequencing. Intriguingly, viral genome has been detected in 0.4% to 11.5% of respiratory tract specimens from children with respiratory disease. The levels of co-infection with established respiratory viruses were in the range between 30.8% and 91.7%. Moreover, some studies report detection of WUPyV in stool or serum. So far, WUPyV infections can not be distinguished from other viral infections by means of clinical symptoms. Respiratory tract disease like pneumonia or bronchitis is frequently observed in patients harbouring WUPyV. Detection of viremia suggests systemic infections. However, the available data do not prove WUPyV to be a human pathogen. Further investigations are necessary

Разработка технологии, проектирование оснастки и участка сборки-сварки основания секции механизированной крепи МКЮ.4У.58.100000

Разработка технологического процесса основания механизированной крепи, проектирование участка сборки-сварки. Выбор составных деталей изделия, определение марки стали, выбор метода сварки, определение режимов сварки и сварочных материалов, нормирование операций, составление технологического процесса, расчет необходимого количество оборудования, численность рабочих и разработка сборочно- сварочного приспособления.Development of the technological process of the foundation of the mechanized support, design of the assembly-welding section. Selection of component parts of the product, determination of the steel grade, selection of the welding method, determination of welding modes and welding materials, rationing of operations, preparation of the technological process, calculation of the required amount of equipment, the number of workers and development of assembly and welding equipment