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Uzhhorod, Ukraine

Uzhhorod National University ), in the city of Uzhhorod, is one of the major universities in Ukraine, and earlier in the Soviet Union. Wikipedia.

Zhaba V.I.,Uzhhorod National University
Problems of Atomic Science and Technology | Year: 2016

Numerical coefficients of analytical forms for deuteron wave function in configuration representation for Reid93 potential are designed. The obtained wave functions do not contain superfluous knots. The designed parameters of a deuteron well agree with the experimental and theoretical data. The polarization performances T20 and Ayy designed on wave functions are proportionate with earlier published. © 2016, National Science Center, Kharkov Institute of Physics and Technology. All rights reserved.

Bidzilya Y.,Uzhhorod National University
European Journal of Science and Theology | Year: 2015

The author analyses the positive influence of the contemporary vernacular media of Zakarpattia on the rebirth of national identity of the Slovak minority in the region. He also touches upon the reasons of the decline of the Slovak information and communication fields in Zakarpattia in the middle of the XXth century which have led to a significant assimilation of this nation. The informative strategy and the thematic content of the ‘Podkarpatskiy Slovak’ and ‘Slovenske slovo’ newspapers and the ‘Dovera’ journal are analyzed. These carry out the regenerative process of the Slovak information and communication segment in Zakarpattia which has formed only during the contemporary history after declaring the independence of Ukraine. Since then the Slovak ethno-national rebirth has been characterized by intensive development. It has been under the direct influence of the Slovak national cultural and educational institutions of Zakarpattia. The department of Slovak studies has become independent, the Uzhhorod National University and the Slovak media in the region as well. © 2015, Ecozone, OAIMDD. All rights reserved.

Bokotey O.V.,Uzhhorod National University
Journal of Alloys and Compounds | Year: 2016

This paper focuses on optical activity investigations of Hg3X2Cl2 (X = Se, Te) crystals. To understand better the nature of gyrotropy occurrence, relation to the crystal structure of Hg3X2Cl2 (X = Se, Te) crystals and contribution of interband transitions to optical rotation the detailed theoretical analysis is conducted. The gyration tensor of Hg3Se2Cl2 crystals is calculated. The theoretical results are confirmed by experimental observation of optical activity. Nanomaterials based on Hg3X2Y2 (X = S, Se, Te; Y = F, Cl, Br, I) gyrotropic crystals have tremendous potential in addressing the two major issues faced by our society: the searching for new energy sources and improving healthcare. Obtained data suggest that the phenomenon of optical activity should be taken into account in the studies concerning optical diagnostic methods in medicine. © 2016 Elsevier B.V.

Bokotey O.V.,Uzhhorod National University
Nanoscale Research Letters | Year: 2016

This paper reviews the optical properties, such as refractive index, optical dielectric constant, and reflection coefficient of the Hg3Te2Cl2 crystals. The applications of the Hg3X2Y2 crystals as electronic, optical, and optoelectronic devices are very much determined by the nature and magnitude of these fundamental material properties. The origin of chemical bonding in the crystals is very important for definition of the physical and chemical properties. The main structural feature of the Hg3X2Y2 crystals is the presence of covalent pyramids [XHg3] and linear X-Hg-X groups. Optical properties are calculated according to the model proposed by Harrison. The refractive index in the spectral region far from the absorption edge is determined within the generalized single-oscillator model. The calculated results are found to be in good agreement with experimental data. © 2016, Bokotey.

Grondin J.,University of Bordeaux 1 | Lassegues J.-C.,University of Bordeaux 1 | Cavagnat D.,University of Bordeaux 1 | Buffeteau T.,University of Bordeaux 1 | And 2 more authors.
Journal of Raman Spectroscopy | Year: 2011

Imidazolium-based ionic liquids (ILs) involving anions of variable coordinating strength have been investigated using infrared (IR) and Raman spectroscopies, density functional theory (DFT) calculations and selective deuteration of the imidazolium CH groups. Particular emphasis has been placed on the vibrational assignments of the anion and cation internal vibrations, a prerequisite before any interpretation of spectral changes due to ion-ion interactions in these unconventional liquids. The vibrations of highly symmetric and weakly coordinating anions, such as PF6 -, have unperturbed wavenumbers, but unexpected IR or Raman activity for some modes, showing that the anion is subjected to an anisotropic electric field. The stretching as well as the in-plane and out-of-plane bending modes of the imidazolium CH groups are anharmonic. They give broad bands that reflect a large distribution of interactions with the surrounding anions. All the bending modes are mixed with ring vibrations and the stretching modes are complicated by Fermi resonance interactions with overtones and combination of in-plane ring modes. However, the stretching vibration of the quasi-diatomic C(2)i- D bond appears to be a good spectroscopic probe of the increasing cation-anion interactions when the coordinating strength of the anion increases. The broad absorption observed in the far IR with weakly coordinating anions remains practically unchanged when the acidic C(2)i- H imidazolium bond is methylated and even when the imidazolium cation is substituted by tetra-alkyl ammonium or pyrrolidinium cations. It is concluded that this absorption is a general feature of any IL, coming from the relative translational and librational motions of the ions without needing to invoke C(2)i- H anion hydrogen bonds. Vibrational assignments are given between 3200 and 40 cm-1 of ionic liquids involving imidazolium cations and anions of variable coordinating strength, with particular emphasis on the nature of the Ci- H⋯anion interactions. Copyright © 2010 John Wiley & Sons, Ltd.

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