Phase Diagram of Metal-Insulator Transition in System with Anderson-Hubbard Centers

The model of a strongly correlated system in which periodically spaced Anderson-Hubbard centers are introduced into narrow-band metal is considered. Besides the interactions between localized magnetic moments and strong on-site Coulomb interaction, the model takes into account the hybridization of localized and band states. To study the efect of the lattice deformation on the electrical properties of the system the phonon term and elastic energy have been taken into account. Green functions for band and localized electrons have been found. On this base, the energy spectrum has been investigated as function of model parameters, temperature and external pressure. The criterion of metal-insulator transition for integer value of electron concentration has been derived and the phase diagram of the metal-insulator transition has been built.Comment: presented at 12 International Simposium on Physics of Materials, Prague 4-8.09.201

NN potentials from inverse scattering in the J-matrix approach

An approximate inverse scattering method [7,8] has been used to construct separable potentials with the Laguerre form factors. As an application, we invert the phase shifts of proton-proton in the $^1S_0$ and $^3P_2-^3F_2$ channels and neutron-proton in the $^3S_1-^3D_1$ channel elastic scattering. In the latter case the deuteron wave function of a realistic $np$ potential was used as input.Comment: LaTex2e, 17 pages, 3 Postscript figures; corrected typo

Antiseptics: analysis of assortment, technologies of compounding and using

Proper hand hygiene disrupts the spread of a numerous infections and is therefore a guarantee of good human health. Wide use of antiseptics by the public raises questions about their effectiveness, safety and availability. At the same time, the culture of hand hygiene is a priority for all spheres of society. The aim of the work is to study the range of antiseptics on the pharmaceutical market of Ukraine and assess the peculiarities of their use, to compound the antiseptic for hands of optimal composition and provide its quality control. The study used information retrieval, pharmacological, organoleptic, physical and chemical, graphic and statistical methods. Based on the analysis of information sources, the active ingredients and their optimal concentrations in the composition of antiseptics of industrial and extemporaneous production have been established. According to the results of this stage of work, four prescriptions of antisepticswith different compositions were selected for further compounding.It was found that positive results of quality control according to the organoleptic and physical and chemical parameters were received for the solution compounded using 96%ethanol and paying attention to key technological features that are decisive in the compounding of non-aqueous solutions and affect the quality of the product. The problematic issues of registration and circulation of antiseptics in Ukraine were identified as a result of the development of normative documents. Its consequence is the spread of unscrupulous practices of selling products that do not have a proven disinfection effect. The active components of industrial and extemporaneous antiseptic agents were determined based on the analysis of literary sources. It was established that most of the products recommended for home production did not meet the requirements of regulatory documents in terms of composition and concentration of active substances. This is a sign of the spread of unreliable information among the population, which can harm health. The need to comply with the rules for dosing ingredients and the technological features of manufacturing of non-aqueous solutions is substantiated. It was established that the required concentration of ethanol in the finished product is achieved when preparing solutions according to prescription N 3, which included 96% ethanol according to the results of the physical and chemical control. The presence of disinfection corners at National Pirogov Memorial Medical University, Vinnytsya certainly popularizes hand hygiene among students of higher education. This is indicated by the high frequency of students' use of the products that were placed in the appropriate places. At the same time, it was established the need to conduct educational work among students, which will contribute to increasing the level of awareness of the regulatory framework of registered disinfectants, their proper composition, labeling and method of use

Micromechanical Properties of Injection-Molded Starch–Wood Particle Composites

The micromechanical properties of injection molded starch–wood particle composites were investigated as a function of particle content and humidity conditions. The composite materials were characterized by scanning electron microscopy and X-ray diffraction methods. The microhardness of the composites was shown to increase notably with the concentration of the wood particles. In addition,creep behavior under the indenter and temperature dependence were evaluated in terms of the independent contribution of the starch matrix and the wood microparticles to the hardness value. The influence of drying time on the density and weight uptake of the injection-molded composites was highlighted. The results revealed the role of the mechanism of water evaporation, showing that the dependence of water uptake and temperature was greater for the starch–wood composites than for the pure starch sample. Experiments performed during the drying process at 70°C indicated that the wood in the starch composites did not prevent water loss from the samples.Peer reviewe

Морфологічна характеристика серця нутрії

Background. The work considers morphological features of the nutria heart in postnatal ontogenesis: heart shape, internal relief of the chambers, papillary muscles, their shape, size and histological structure of the ventricular walls. Internal relief provides optimal process of ventricular contraction and relaxation. Formation of cardiac structure and structural features of cells reflect morphological structure and hemodynamic of the mature heart. Objective. To reveal the morphological features of the internal structure of a trabecular-papillary apparatus of nutria heart in postnatal ontogenesis. To determine the ratio of connective tissue to cardiomyocytes and structural patterns of internal trabecular-papillary apparatus of nutria heart, including the number, shape and size of papillary muscles in the right and left ventricles. Methods. As a material for the study we used 35 nutria hearts. Hearts were isolated and fixed in 10% neutral formalin. Morphometric methods were used: with the help of a ruler and a compass the size of the heart, thickness of the walls of right and left ventricles were measured. Histological sections were prepared in transverse and longitudinal plane with the further staining with hematoxylin. Calculation of cardiac index was performed by the formula: the ratio of the heart weight to the body weight. To determine the shape of the heart the ratio of the heart width to the body length was calculated. In value of the index up to 65% the heart shape was considered as conical, from 65% to 75% - ellipsoid, more than 75% - spherical. Results. Morphometric investigation showed that the nutria heart is globe-shaped (82%). The average cardiac index is - 0,4. The size of papillary muscles of a left ventricle prevails over the same parameter in the right ventricle. Nutria heart is characterized by a higher percentage of muscle tissue - 68.9%, while the percentage of connective tissue is - 31.1%. Conclusion. The structure and topography of papillary muscles of nutria heart demonstrated significant individual diversity of shape and quantity. The number of papillary muscles and tendon strings reflects the degree of fixation, which also depends on the size of muscles: the more massive papillary muscle – the higher degree of fixing it has. The percentage of muscle tissue in myocardium depends on the activity of the animal.В работе рассматриваются морфологические особенности строения сердца нутрии в постнатальном онтогенезе: формы сердца, двигательной активности, внутреннего рельефа камер, папиллярно-трабекулярного аппарата, сосочковых мышц, их формы, размеры и гистологическое строение стенок желудочков. Внутренний рельеф желудочков обеспечивает оптимальный процесс сокращения и расслабления сердечной стенки. Формирование структуры сердца и отличительные черты клеточного состава отражают детальное особенности морфологической структуры и гемодинамики зрелого сердца животного.У роботі розглядаються морфологічні особливості будови серця нутрії в постнатальному онтогенезі: форма серця, рухова активність, будова внутрішнього рельєфу камер, папілярно-трабекулярного апарату, сосочкові м'язи, їх форма, розміри та гістологічна будова стінок шлуночків. Внутрішній рельєф шлуночків забезпечує оптимальний процес скорочення і розслаблення серцевої стінки. Формування структури серця та ознаки клітинного складу відображають особливості морфологічної структури і гемодинаміки зрілого серця тварини