EELS study of the epitaxial graphene/Ni(111) and graphene/Au/Ni(111) systems

We have performed electron energy-loss spectroscopy (EELS) studies of Ni(111), graphene/Ni(111), and the graphene/Au/Ni(111) intercalation-like system at different primary electron energies. A reduced parabolic dispersion of the \pi plasmon excitation for the graphene/Ni(111) system is observed compared to that for bulk pristine and intercalated graphite and to linear for free graphene, reflecting the strong changes in the electronic structure of graphene on Ni(111) relative to free-standing graphene. We have also found that intercalation of gold underneath a graphene layer on Ni(111) leads to the disappearance of the EELS spectral features which are characteristic of the graphene/Ni(111) interface. At the same time the shift of the \pi plasmon to the lower loss-energies is observed, indicating the transition of initial system of strongly bonded graphene on Ni(111) to a quasi free-standing-like graphene state.Comment: 31 pages, 5 figures, accepted in Carbo

Instructions for laboratory training in Special Microbiology and Virology for students of Faculty of Dentistry

МИКРОБИОЛОГИЯМЕТОДИЧЕСКИЕ УКАЗАНИЯЛАБОРАТОРНЫЕ РАБОТЫВИРУСОЛОГИЯИНОСТРАННЫЕ СТУДЕНТЫПРАКТИЧЕСКИЕ НАВЫКИСодержатся план, программа практических занятий и основные практические навыки по общей микробиологии и вирусологии

Structural and electronic properties of the graphene/Al/Ni(111) intercalation-like system

Decoupling of the graphene layer from the ferromagnetic substrate via intercalation of sp metal has recently been proposed as an effective way to realize single-layer graphene-based spin-filter. Here, the structural and electronic properties of the prototype system, graphene/Al/Ni(111), are investigated via combination of electron diffraction and spectroscopic methods. These studies are accompanied by state-of-the-art electronic structure calculations. The properties of this prospective Al-intercalation-like system and its possible implementations in future graphene-based devices are discussed.Comment: 20 pages, 8 figures, and supplementary materia

DEVELOPING OF DECOMPOSITION MODELS OF URFU COMPETITIVENESS METRICS

Due to government order 5-100-2020 5 Russian universities need to get in top-100 list according to world university rankings systems. The aim of the research is to investigate, whether it is real for UFU to reach that goal and to study the reasons of its rating reduction during the last year

Instructions for laboratory training in General Microbiology & Immunology

МИКРОБИОЛОГИЯАЛЛЕРГОЛОГИЯ И ИММУНОЛОГИЯМЕТОДИЧЕСКИЕ УКАЗАНИЯЛАБОРАТОРНЫЕ РАБОТЫПРАКТИЧЕСКИЕ НАВЫКИСодержатся план, программа практических занятий и основные практические навыки по общей микробиологии и иммунологии

Trypsin. Properties and Use in the Production of Biological Medicinal Products

The production of biological medicinal products used for prophylactic, diagnostic and therapeutic purposes includes the use of inherently  variable biological processes and materials. In order to ensure the  quality of the finished biological product it is necessary to determine  the source, nature and fitness for use of the starting materials, including reagents, culture media, buffer solutions, sera,  and enzymes. The article summarises literature data on the  structure, properties and mode of action of the animal-derived  reagent trypsin — proteolytic enzyme widely used in the production  of biological medicinal products. The article dwells upon the sources  of trypsin, methods of its production, requirements for trypsin  products of different purity grades intended for human and  veterinary use as well as for use as reagents in the production of  vaccines, advanced therapy medicinal products and genetically engineered products. The article describes the role that  trypsin plays in the human and animal intestinal digestive enzyme  systems, in dissociation of cells in cultures in the process of cell  passaging, in the mechanism of proteolitic activation and inactivation of a wide range of viruses, and in the examination of proteins  primary structure

STATISTICAL MODELS OF UNIVERSITIES BEHAVIOUR IN QS WORLD UNIVERSITY RANKINGS

The aim of the research is to investigate QS World University Rankings. First, we try to assess distribution of the universities in the rating and then divide it in linear groups, which will help us to evaluate the possibility of migration from one group to another. Correlational analysis also allowed us to find the most valuable metrics

CHOOSING OPTIMAL STRATEGIES OF UNIVERSITY DEVELOPMENT USING THE PARETO SET

Growth of university in world university rankings can be presented as a multi-objective problem. According to Edgeworth-Pareto principle, the best solution to this problem should be found in Pareto set, which consists of optimal nondominated vectors. Using this principle, we try to build the Pareto set and find out how it can help us make our decisions on university development better

Controlled assembly of graphene-capped nickel, cobalt and iron silicides

In-situ dendrite/metallic glass matrix composites (MGMCs) with a composition of Ti46Zr20V12Cu5Be17 exhibit ultimate tensile strength of 1510 MPa and fracture strain of about 7.6%. A tensile deformation model is established, based on the five-stage classification: (1) elastic-elastic, (2) elastic-plastic, (3) plastic-plastic (yield platform), (4) plastic-plastic (work hardening), and (5) plastic-plastic (softening) stages, analogous to the tensile behavior of common carbon steels. The constitutive relations strongly elucidate the tensile deformation mechanism. In parallel, the simulation results by a finite-element method (FEM) are in good agreement with the experimental findings and theoretical calculations. The present study gives a mathematical model to clarify the work-hardening behavior of dendrites and softening of the amorphous matrix. Furthermore, the model can be employed to simulate the tensile behavior of in-situ dendrite/MGMCs