Investigation of Changing Volt-Ampere Characteristics of AlGaInP Heterostructures with Multiple Quantum Wells under Ionizing Radiation

The results of research into degradation of volt-ampere characteristics of light emitting diodes produced on the base of AlGaInP heterostructures with multiple quantum wells are presented on the example of light emitting diodes (emission wavelengths 623 nm and 590 nm) under gamma quantum and fast neutron radiation in passive powering mode. The shifts of volt-ampere characteristics into the higher voltage range have been observed in conditions of increasing neutron fluence and radiation dose. The observed increase in the resistance of ohmic contacts is caused by the rising resistance of adjacent area, which in its turn results from the changing mobility of charge carriers. The latter varies with the growth of introduced defects under irradiation. Two different areas of current generation have been identified. A mechanism of current generation depends on injected charge carriers in the range of mid-level electron injection. Moreover, the range of high electron injection is distinguished by changing resistance of light emitting diode cores alongside with current generation conditioned by charge carrier injection

Nanocarbons And Quantum Dots Formation In New Hybrid Materials

We present technique of obtaining complex hybrid structures combining the multi-walled carbon nanotubes or multi-layer graphene and luminescent hydrophobic semiconductor core/shell quantum dots CdSe/ZnS. As a result, a formation of quantum dot decorated carbon nanotubes and graphene films is evidenced by 2D microluminescence and micro-Raman mapping of quantum dots and nanocarbons, respectively, where a spatial correlation between the luminescence and Raman signals is found. © 2014 SPIE.912612-02-00938; RFBR; Russian Foundation for Basic Research; 12-02-01263; RFBR; Russian Foundation for Basic ResearchKalantar-Zadeh, K., (2008) Nanotechnology-Enabled Sensors, p. 490. , K. Kalantar-zadeh, B. Fry. New York.: Springer Science & Business Media(1955) Springer Handbook of Nanotechnology, , Ed. B. Bhusha.-New York.: Springer Science & Business Media, 2010, ISBN: 978-3-642-02524-2Cattanach, K., Kulkarni, R.D., Kozlov, M., Manohar, S.K., Flexible carbon nanotube sensors for nerve agent simulants (2006) Nanotechnology, 17, pp. 4123-4128Peng, S., O'Keeffe, J., Wei, C., Cho, K., Kong, J., Chen, R., Franklin, N., Dai, H., Carbon nanotube chemical and mechanical sensors (2001) Proceedings of the 3rd International Workshop on Structural Health Monitoring, pp. 1-8. , USA, September 17-19, 2001, Stanford University, StanfordSnow, E.S., Perkins, F.K., Houser, E.H., Badescu, S.C., Reinecke, T.L., (2005) Science, 307, pp. 1942-1945. , Chemical detection with a single-walled carbon nanotube capacitorStar, A., Joshi, V., Skarupo, S., Thomas, D., Gabriel, J.-C.P., Gas sensor array based on metal-decorated carbon nanotubes (2006) J. Phys. Chem. B, 110, pp. 21014-21020Xu, Z., Gao, H., Guoxin, H., Solution-based synthesis and characterization of a silver nanoparticle-graphene hybrid film Carbon, 49 (14), pp. 4731-4738Cao, A., Liu, Z., Chu, S., Wu, M., Ye, Z., Cai, Z., Chang, Y., Liu, Y., A facile one-step method to produce graphene-cds quantum dot nanocomposites as promising optoelectronic materials (2010) Adv. Mater, 22, pp. 103-106Yang, Y.-K., He, Ch.-E., He, W.-J., Yu, L.-J., Peng, R.-G., Xie, X.-L., Wang, X.-B., Mai, Y.-W., Reduction of silver nanoparticles onto graphene oxide nanosheets with N,Ndimethylformamide and SERS activities of GO/Ag composites (2011) J Nanopart. Res, 13, pp. 5571-5581Lightcap, V., Kamat, P.V., Fortification of cdse quantum dots with graphene oxide. Excited state interactions and light energy conversion (2012) J. Am. Chem. Soc, 134, pp. 7109-7116Ghosh, A., Rao, K.V., Voggu, R., George, S.J., Non-covalent functionalization, solubilization of graphene and single-walled carbon nanotubes with aromatic donor and acceptor molecules (2010) Chemical Physics Letters, 488, pp. 198-201Kim, Y.-T., Han, J.H., Hong, B.H., Kwon, Y.-U., Electrochemical synthesis of cdse quantum-dot arrays on a graphene basal plane using mesoporous silica thin-film templates (2010) Adv. Mater, 22, pp. 515-518Konstantatos, G., Badioli, M., Gaudreau, L., Osmond, J., Bernechea, M., Arquer De Garcia, F.P., Gatti, F., Koppens, L.F.H., Hybrid graphene-quantum dot phototransistors with ultrahigh gain (2012) Nature Nanotechnology, 7, pp. 363-368Wang, Y., Yao, H.-B., Wang, X.-H., Yu, Sh.-H., One-pot facile decoration of CdSe quantum dots on graphene nanosheets: Novel graphene-CdSe nanocomposites with tunable fluorescent properties (2011) J. Mater. Chem, 21, pp. 562-566Murray, C.B., Gaschler, W., Sun, S., Doyle, H., Betley, T.A., Kagan, C.R., Colloidal synthesis of nanocrystals and nanocrystal superlattices IBM J. Res. & Dev., 45 (1), pp. 47-56Ermakov, V.A., Alaferdov, A.V., Vaz, A.R., Baranov, A.V., Moshkalev, S.A., Nonlocal laser annealing to improve thermal contacts between multi-layer graphene and metals (2013) Nanotechnology, 24 (15), p. 15530110Bogdanov, K., Fedorov, A., Osipov, V., Enoki, T., Takai, K., Hayashi, T., Ermakov, V., Moshkalev A, S., Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies Baranov Carbon, , 02/201

Fragmentation and Multifragmentation of 10.6A GeV Gold Nuclei

We present the results of a study performed on the interactions of 10.6A GeV gold nuclei in nuclear emulsions. In a minimum bias sample of 1311 interac- tions, 5260 helium nuclei and 2622 heavy fragments were observed as Au projec- tile fragments. The experimental data are analyzed with particular emphasis of target separation interactions in emulsions and study of criticalexponents. Multiplicity distributions of the fast-moving projectile fragments are inves- tigated. Charged fragment moments, conditional moments as well as two and three -body asymmetries of the fast moving projectile particles are determined in terms of the total charge remaining bound in the multiply charged projectile fragments. Some differences in the average yields of helium nuclei and heavier fragments are observed, which may be attributed to a target effect. However, two and three-body asymmetries and conditional moments indicate that the breakup mechanism of the projectile seems to be independent of target mass. We looked for evidence of critical point observable in finite nuclei by study the resulting charged fragments distributions. We have obtained the values for the critical exponents gamma, beta and tau and compare our results with those at lower energy experiment (1.0A GeV data). The values suggest that a phase transition like behavior, is observed.Comment: latex, revtex, 28 pages, 12 figures, 3tables, submitted to Europysics Journal

EFFICACY OF RIBOSOMAL COMPLEX IN EPSTEIN–BARR VIRAL INFECTION IN CHILDREN

Article contains study results of clinical efficacy of ribomunil in complex treatment and rehabilitation program in 30 children, recovered from acute Epstein–Barr viral infection, with disbiosis of nasal, oropharyngeal and colon mucosa. It has been shown that application of ribosomal complex over 1 to 6 months allows successful sanitization of main body loci, it also promotes normalization of blood parametres, decrease general sensitization of the body and thus prevent Epstein–Barr viral infection from becoming chronic and decrease the amount of intercurrent diseases in children.Key words: Epstein–Barr viral infection, disbiosis of main body loci, ribomunil, children. (Voprosy sovremennoi pediatrii — Current Pediatrics. — 2011; 10 (6): 41–47.

ВЫРАЖЕНИЕ НАЦИОНАЛЬНОЙ И КУЛЬТУРНОЙ ИДЕНТИЧНОСТИ В РУССКИХ И АНГЛИЙСКИХ ПОСЛОВИЦАХ

The paper deals with the linguistic comparative structural and semantic analysis of English and Russian proverbs with the concept of ‘happiness-unhappiness’ that reflects national and cultural identity and the specificity of thinking of the English and Russian people. The aim of the paper is to explore and show similarities and differences in mentality and perception of the world by English and Russian people. This aim was achieved due to the study of the structural and semantic components and expressive-evaluative components of the proverbs. As a result of the study both common and specific meanings of the Russian and English proverbs were revealed in the languages under consideration. The object of the study is English and Russian proverbs associated with the binary concept of “happiness-unhappiness”. During the analysis the basic meaning of the proverbs were revealed and systematized. The analysis of the phraseological meaning, lexical components, syntactic structures, expressive and emotive connotations, sound organization of English and Russian proverbs made it possible to identify the role of linguistic means in expressing the features of the mentality of the English and Russian peoples.В статье проводится сопоставительный структурно-семантический анализ английских и русских пословиц, выражающих идею «счастье-несчастье» и отражающих национально-культурную самобытность и специфику мышления английского и русского народов. Цель статьи - описать и показать сходство и различия в менталитете и восприятии мира носителями английского и русского языков. Эта цель была достигнута благодаря изучению структурных и семантических особенностей и выразительно-оценочных компонентов пословиц. В результате исследования на материале указанных языков были выявлены общие и специфические свойства русских и английских пословиц. Объектом исследования являются английские и русские пословицы, связанные с бинарной концепцией «счастье-несчастье». Во время анализа был выявлен и систематизирован основной смысл пословиц. Анализ фразеологического значения, лексических компонентов, синтаксической структуры, выразительных и эмоциональных свойств, коннотаций, организации английских и русских пословиц позволили определить роль лингвистических средств в выражении особенностей менталитета носителей английского и русского языков

ВЫРАЖЕНИЕ НАЦИОНАЛЬНОЙ И КУЛЬТУРНОЙ ИДЕНТИЧНОСТИ В РУССКИХ И АНГЛИЙСКИХ ПОСЛОВИЦАХ

The paper deals with the linguistic comparative structural and semantic analysis of English and Russian proverbs with the concept of ‘happiness-unhappiness’ that reflects national and cultural identity and the specificity of thinking of the English and Russian people. The aim of the paper is to explore and show similarities and differences in mentality and perception of the world by English and Russian people. This aim was achieved due to the study of the structural and semantic components and expressive-evaluative components of the proverbs. As a result of the study both common and specific meanings of the Russian and English proverbs were revealed in the languages under consideration. The object of the study is English and Russian proverbs associated with the binary concept of “happiness-unhappiness”. During the analysis the basic meaning of the proverbs were revealed and systematized. The analysis of the phraseological meaning, lexical components, syntactic structures, expressive and emotive connotations, sound organization of English and Russian proverbs made it possible to identify the role of linguistic means in expressing the features of the mentality of the English and Russian peoples.В статье проводится сопоставительный структурно-семантический анализ английских и русских пословиц, выражающих идею «счастье-несчастье» и отражающих национально-культурную самобытность и специфику мышления английского и русского народов. Цель статьи - описать и показать сходство и различия в менталитете и восприятии мира носителями английского и русского языков. Эта цель была достигнута благодаря изучению структурных и семантических особенностей и выразительно-оценочных компонентов пословиц. В результате исследования на материале указанных языков были выявлены общие и специфические свойства русских и английских пословиц. Объектом исследования являются английские и русские пословицы, связанные с бинарной концепцией «счастье-несчастье». Во время анализа был выявлен и систематизирован основной смысл пословиц. Анализ фразеологического значения, лексических компонентов, синтаксической структуры, выразительных и эмоциональных свойств, коннотаций, организации английских и русских пословиц позволили определить роль лингвистических средств в выражении особенностей менталитета носителей английского и русского языков