Synthesis and characterisation of nanocrystalline ZrN PVD coatings on AISI 430 stainless steel

The nanocrystalline films of zirconium nitride have been synthesized using ion-plasma vacuum-arc deposition technique in combination with high-frequency discharge (RF) on AISI 430 stainless steel at 150oC. Structure examinations X-ray fluorescent analysis (XRF), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) with microanalysis (EDS), and transmission electron microscopy (TEM), nanoidentation method – were performed to study phase and chemical composition, surface morphology, microstructure and nanohardness of coatings. The developed technology provided low-temperature coatings synthesis, minimized discharge breakdown decreasing formation of macroparticles (MPs) and allowed to deposit ZrN coatings with hardness variation 26.6…31.5 GPa. It was revealed that ZrN single-phase coatings of cubic modification with finecrystalline grains of 20 nm in size were formed

Anti-corrosion ceramic coatings on the surface of Nd-Fe-B repelling magnets

The results of vacuum-arc deposition of thin ZrO₂coatings to protect the surface of Nd-Fe-B permanent magnets used as repelling devices in orthodontics are presented. The structure, phase composition and mechanical properties of zirconium dioxide films have been investigated by means of SEM, XRD, EDX, XRF and nanoindentation method. It was revealed the formation of polycrystalline ZrO₂ films of monoclinic modification with average grain size 25 nm. The influence of the ZrO₂ coating in terms of its barrier properties for corrosion in quasi-physiological 0.9 NaCl solution has been studied. Electrochemical measurements indicated good barrier properties of the coating on specimens in the physiological solution environment

Experimental Evaluation of Russian Anode Layer Thrusters

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76973/1/AIAA-1994-3010-800.pd

ДНК-технологии (молекулярное маркирование) в селекции томата на устойчивость к Tobacco Mosaic Virus

Relevance. The purpose of this work is to create new discrete competitive tomato genotypes based on modern biotechnological approaches with increased resistance to the tobacco mosaic virus, economically valuable traits and adapted to the soil and climatic conditions of cultivation in the southern regions of the Russian Federation.Methods. At the first stage of the study, SSR markers taken from literature sources were tested [1;2] and PCR conditions were optimized for the identification of target Tm genes (Tm2a, Tm22, providing resistance to tobacco mosaic virus at the tissue level) in the breeding material available in the department of vegetable and potato growing.Results. Two informative molecular markers Tms 37 and UMD 2060 were selected, which reveal the allelic difference between resistant and susceptible samples. Hybridization of FMS tomato lines with samples having the desired genes of interest in the genotype for obtaining tomato lines resistant to TMV was carried out. Seeds of paternal forms - donors of target genes were obtained for their further use in breeding work. The scientific novelty lies in the study of the discrete genetic material of Solanumlycopersicum, used in the breeding process, and preserving its functions in a new genetic environment.Актуальность. Целью данной работы является создание на основе современных биотехнологических подходов (молекулярное маркирование) новых конкурентоспособных генотипов томата с повышенной устойчивостью к вирусу табачной мозаики, хозяйственно-ценными признаками и адаптированных к почвенно-климатическим условиям выращивания в южных регионах РФ.Материал и методика. На первом этапе исследования выполнена апробация SSR-маркеров, взятых из литературных источников [1;2] и оптимизированы условия ПЦР для идентификации целевых генов Tm (Tm2a, Tm22, обеспечивающих устойчивость к вирусу табачной мозаики на тканевом уровне) в селекционном материале, имеющемся в отделе овощекартофелеводства.Результаты. Отобрано два информативных молекулярных маркера Tms 37 и UMD 2060, которые выявляют аллельную разницу между устойчивыми и восприимчивыми образцами. Проведена гибридизация ФМС-линий томата с образцами, имеющими в генотипе искомые гены интереса для получения резистентных к ВТМ линий томата. Получены семена отцовских форм – доноров целевых генов для дальнейшего их использования в селекционной работе. Научная новизна заключается в изучении дискретного генетического материала Solanum lycopersicum, используемого в селекционном процессе и сохраняющего свои функции в новом генетическом окружении

Evaluation of carcinogenic risks of the workers employed in the main professions in the agglomeration and blast-furnace shops

The aim of the study – to assess the carcinogenic risks of workers engaged in the modern production of sinter and cast iron.Цель исследования – провести оценку канцерогенных рисков работающих, занятых в современном получении агломерата и чугуна

Relative luminosity measurement of the LHC with the ATLAS forward calorimeter

In this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.Comment: 16 page