Temperature dependent photoluminescence of single CdS nanowires

Temperature dependent photoluminescence (PL) is used to study the electronic properties of single CdS nanowires. At low temperatures, both near-band edge (NBE) photoluminescence (PL) and spatially-localized defect-related PL are observed in many nanowires. The intensity of the defect states is a sensitive tool to judge the character and structural uniformity of nanowires. As the temperature is raised, the defect states rapidly quench at varying rates leaving the NBE PL which dominates up to room temperature. All PL lines from nanowires follow closely the temperature-dependent band edge, similar to that observed in bulk CdS.Comment: 11 pages, 4 figure

Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires

Time-resolved photoluminescence (PL) and micro-PL imaging were used to study single CdS nanowires at 10 K. The low-temperature PL of all CdS nanowires exhibit spectral features near energies associated with free and bound exciton transitions, with the transition energies and emission intensities varying along the length of the nanowire. In addition, several nanowires show spatially localized PL at lower energies which are associated with morphological irregularities in the nanowires. Time-resolved PL measurements indicate that exciton recombination in all CdS nanowires is dominated by non-radiative recombination at the surface of the nanowires.Comment: 9 pages, 3 figures, to be published in Applied Physics Letter

On the Issue of Judicial Act Enforceability

The article deals with the questions of factual judicial acts enforceability. The author comes to the conclusion about the necessity of using the enforceability demand for the conditions of amicable agreement

C-kit and desmin-positive cells in expression in islets of pancreas during alloxan diabetes in rats.

Nowadays there are findings that C-kit-positive and desmin-positive stellate cells help to regenerate endocrine part of pancreas. But still it is unknown about their role and the way of differentiation of these cells during pancreas regeneration. That's why the aim of our work was to study the dynamic of these cells population during alloxan diabetes in rats. The work was made on 33 rats with experimental diabetes. Blood glucose, insulin and glucagon levels were analyzed. Also the expression of desmin (marker of stellate cells), α-SMA (marker of myofibroblast), C-kit (marker of endocrine stem cells), insulin and glucagon (marker of differentiated α- And β-cells of Langerhans islets) was studied. The expression of desmin was found after one day of experimental diabetes in islets cells of pancreas. Maximum of these cells was after the third day of the experiment. Also after one day of the experiment C-kit-positive cells, which expressed insulin and glucagon were found. We suppose that stellate cells are the main factor of microenvironment for differentiation of C-kit-positive progenitor cells into β-cells through the stage of glucagon-positive cells because stellate pancreas cells can produce different growth factors and components of intercellular matrics. © Human stem cells institute, 2013

Population Dynamics of MafA-Positive Cells During Ontogeny of Human Pancreas

© 2016, Springer Science+Business Media New York.Diverse transcription factors influencing cell differentiation are often chosen as markers of β cell progenitors. One of these transcription factors is MafA, which according to data in literature activates the expression of insulin gene in β cells. Other data support the hypothesis that MafA is required solely for the regulation of insulin secretion by β cells of adult islets and is not involved in the development of islet cells. In this paper, we study the role of MafA through both examination of human pancreas ontogeny and comparison of these data with dynamic changes in the population of insulin-positive and glucagon-positive cells. The aim of this research was the immunohistochemical analysis of MafA, insulin, and glucagon expression during human pancreas ontogeny. The research was conducted on whole embryos and isolated human fetal organs, obtained as a result of either miscarriage or legal medical abortion with voluntary consent of patients, and also on autopsy material from infant and adult human pancreas. As a result of this study, it was found that, during the ontogeny of human pancreas, the first MafA-positive cells appear in the islets at 12.5 weeks of gestation, that is, later than both insulin-positive cells (11.5 weeks of gestation) and glucagon-positive cells (8.5 weeks of gestation). No MafA-positive cells were found in the epithelium of pancreatic ducts. The number of MafA-positive cells in the islets increases during pancreatic organogenesis. The results of our research do not allow us to regard MafA as a marker of undifferentiated progenitors of islet cells. Based on this, we believe that the results obtained in this study are a supplementary contribution to the hypothesis that relates MafA to the markers of adult β cells

Realization of potential of enterprise structure development as the criterion of ensuring the object-differentiated approach to rendering the state support : the Russian Federation

The objective of the research. Undertaken in the conditions of an economic crisis and sanctions restrictions the attempts of system optimization of business activity state regulation in Russia still don't contribute to increase in business sector efficiency and to full accomplishment of all assigned social and economic functions. In the article the author rationalizes the point, assuming that in the basis of state regulation system the implementation level of entrepreneurial structure capacity, as the most adequate criterion of rendering the state support of business activity, which besides shall carry an object-differentiated nature, shall be laid. Short description of methodology. In the article authors offer an original interpretation of the concept "potential of enterprise structure development" and a method to calculate an indicator "the realization level of potential of enterprise structure development" as key criterion at realizing an object-differentiated approach to rendering the state support of enterprise structures. Compilation of the most important research results and their significance. In the article based on the formed differentiation criteria of measures of the state support of entrepreneurial structures authors offer the measures system differentiated on the bases of the implementation level of potential of entrepreneurial structures development and the importance of this structure in strategic priorities system of territorial development on preferential creation of institutional conditions for an entrepreneurship development; on internal capacity development of entrepreneurial structures; on direct support of business activity.peer-reviewe

Conditions for the formation of a non-autonomous phase at the structural deformation of complex vanadium oxides

Received: 02.03.2018. Accepted: 10.04.2018. Published: 10.05.2018.A new previously unknown effect of a reversible transition from a singlephase system to a heterophase system containing a non-autonomous phase was observed during thermal and chemical deformations of the Zn2–2xCd2xV2O7 structure.The role of local symmetry in the formation of the non-autonomous phase is shown on the basis of X-ray diffraction studies in situ and a comparative crystal-chemical analysis of the structural deformations of isoform monoclinic solid solutions of zinc and copper pyrovanadates with zero volumetric thermal expansion.The work was supported by UB RAS (project 18-10-3-32)

Importantly as a Social Phenomenon of Modern Russia

The article deals with child and adolescent neglect in terms of deviant behavior. During the twentieth and twenty-first centuries, there were several bursts of teenage neglect and homelessness, which was associated with political and economic events in Russia. The main reasons for today's neglect are the consequences of the socio-economic crisis, the loss of the position of the family institution, and the loss of educational functions in educational institutions. To eradicate neglect and related juvenile delinquency, it is necessary to concentrate the efforts of departments, in accordance with the federal law On the Basics of the System for the Prevention of Neglect and Juvenile Delinquency, adopted in 1999, which are responsible for prevention and control in this area.В статье рассматривается детская и подростковая безнадзорность с точки зрения девиантного поведения. На протяжении ХХ и XXI века наблюдалось несколько всплесков подростковой безнадзорности и беспризорности, что было связано с политическими и экономическими событиями в России. Основными причинами сегодняшней безнадзорности являются последствия социально-экономического кризиса, утрата позиций института семьи, а также потеря воспитательных функций в образовательных учреждениях. Для искоренения безнадзорности и сопутствующей ей подростковой преступности необходимо сосредоточение усилий ведомств, в соответствии с федеральным законом «Об основах системы профилактики безнадзорности и правонарушений несовершеннолетних», принятом в 1999 г., являющимися ответственными за профилактику и контроль в этой области