Структура и физико-механические свойства гибридных композиций на основе ненасыщенной полиэфирной смолы и портландцемента

Strength and deformation properties of cured compositions based on unsaturated polyester resin and portlandcement were investigated in all range of concentrations. Optimal ratio of components which lead to high strength properties and high deformation ability was foundИсследованы прочностные и дефор- мационные свойства отвержден- ных композиций на основе ненасы- щенной полиэфирной смолы и портланд- цемента во всем диапазоне составов. Было определено оптимальное соотно- шение компонентов, при котором ком- позиционный материал обладает не только высокими прочностными свой- ствами, но и приобретает высокую де- формационную способность

Structure and physico-mechanical properties of hybrid compositions based on unsaturated polyester resin and portlandcement

Strength and deformation properties of cured compositions based on unsaturated polyester resin and portlandcement were investigated in all range of concentrations. Optimal ratio of components which lead to high strength properties and high deformation ability was foun

INNOVATIVE POTENTIAL OF A MEDICAL ORGANIZATION, AS PART OF ITS ECONOMIC POLICY

The new economic policy of Russia is based on innovation and investment. Before choosing innovative changes, it is mandatory to assess the innovative potential of the organization. can distinguish Three main components can be distinguished in the innovative potential of a medical institution: innovative potential of medical personnel, innovation of facilities and resources, technology innovation (medico-institutional, therapeutic and diagnostic technologies). An audit of the innovative potential of a medical organization is a prerequisite for the formation of a competent economic policy, i. e. business strategies, priority investments. However, studies on a comprehensive assessment of the state of innovative potential of oncological medical organizations have not been conducted yet.Objective. To study the state of innovative potential of a medical organization, as part of its economic policy, using the example of cancer care.Materials and methods. The base of the research is the Higher Educational Institution “Ivanovo Regional Oncology Dispensary”, Department of Health, Ivanovo Region. The research program provided for the use of sociological, expert, mathematical-statistical and analytical methods. Units of observation: medical worker (doctor, paramedical worker) and material and technical resources of “Ivanovo Regional Oncology Dispensary”, The study was conducted in 2018. The integral estimation methodology of a medical organization’s innovation potential includes a quantitative assessment of each component of the potential according to the appropriate methodology.Results. Decline of the innovative capacity medical organization oncological profile on all of its components including: a personnel component at 9,0%, logistical component to 11,0%, technological component at 6,8%. Reduced innovative capacity of health workers is associated with low estimation of its parameters such as: the use of information sources for self-development, the ability to adapt to innovation and research activity. A decrease in the innovative potential of an oncological medical organization was noted in all its components, including: the personnel component by 9.0%, the material and technical component by 11.0%, the technological component by 6.8%. The decline in the innovative potential of health workers is associated with a low assessment of its parameters such as the use of information sources for self-development, the ability to adapt to innovation and research activities. The decrease in the innovation of the organization’s facilities and resources is associated with such indicators as: the scientific and technical level of equipment, the coefficient of accumulation of fixed assets, the coefficient of depreciation of equipment, the coefficient of inclusion of equipment in the standard of assistance. The decrease in innovation in the technological component is associated with the incomplete implementation of such quality attributes of medical services as: efficiency, adequacy, interpersonal interaction, uniqueness, convenience.Conclusion. The results of the study showed that a change in the innovative policy of medical organizations is required, its transfer from an extensive to an intensive strategic vector of development, the use of free financial resources for the purchase of new generation equipment, and the training of medical personnel in modern work technologies

“Hydrotriphylites” Li1-xFe1+x(PO4)1-y(OH)4y as Cathode Materials for Li-ion Batteries

Lithium iron phosphate LiFePO4 triphylite is now one of the core positive electrode (cathode) materials enabling the Li-ion battery technology for stationary energy storage applications, which are important for broad implementation of the renewable energy sources. Despite the apparent simplicity of its crystal structure and chemical composition, LiFePO4 is prone to off-stoichiometry and demonstrates rich defect chemistry owing to variations in the cation content and iron oxidation state, and to the redistribution of the cations and vacancies over two crystallographically distinct octahedral sites. The importance of the defects stems from their impact on the electrochemical performance, particularly on limiting the capacity and rate capability through blocking the Li ion diffusion along the channels of the olivine-type LiFePO4 structure. Up to now the polyanionic (i.e. phosphate) sublattice has been considered idle on this playground. Here, we demonstrate that under hydrothermal conditions up to 16% of the phosphate groups can be replaced with hydroxyl groups yielding the Li1-xFe1+x(PO4)1-y(OH)4y solid solutions, which we term “hydrotriphylites”. This substitution has tremendous effect on the chemical composition and crystal structure of the lithium iron phosphate causing abundant population of the Li-ion diffusion channels with the iron cations and off-center Li displacements due to their tighter bonding to oxygens. These perturbations trigger the formation of an acentric structure and increase the activation barriers for the Li-ion diffusion. The “hydrotriphylite”-type substitution also affects the magnetic properties by progressively lowering the Néel temperature. The off-stoichiometry caused by this substitution critically depends on the overall concentration of the precursors and reducing agent in the hydrothermal solutions, placing it among the most important parameters to control the chemical composition and defect concentration of the LiFePO4-based cathodes