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Search Results: 1 - 10 of 256418 matches for " V.B. Grechushnikov "
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Immunological and morphological aspects of diagnostics of Helicobacter pylori infection and Herpesviridae viruses
N.G. Dudaeva,V.B. Grechushnikov,I.O. Bugaeva,G.N. Tarasova
Saratov Journal of Medical Scientific Research , 2010,
Abstract: 100 patients with inflammatory diseases of gastrointestinal tract were examined. Microbial component of inflammation process was detected by means of polymerase chain reaction (PCR). By means of PCR etiological microbial factor of mononuclear cells in peripheral blood (MCPB) was investigated. Mixtinfication of mucosa membrane of gastrointestinal tract with H. pylori and Herpesviridae in pathology of gastroduodenal area and presence of fragments of microorganisms DNA in PBMC were revealed. This phenomenon may be important in pathogenesis of pathology of gastrointestinal tract and forms the basis for its further investigation
Relaxation dynamics near ferroelectric phase transitions and the central-peak phenomenon
Kokshenev, V.B.;
Brazilian Journal of Physics , 2000, DOI: 10.1590/S0103-97332000000400020
Abstract: the instability of the paraelectric phase in ferroelectrics, driven by thermal fluctuations, is discussed on the basis of the quantum three-dimensional spin-1/2 transverse-field ising model (tim) within the framework of the green function method. the two-step critical dynamics of the tim is analyzed through the ferroelectric order-parameter fluctuation spectra observed above the critical temperature tc. the spectra profiles are given near tc in explicit form. the slow-down exponents dc = and ds = are deduced for the slow and fast parts of structural relaxation and are compared with those known from the literature.
The method of corrosion crack opening evaluation for the reinforced concrete structures technical state assessment
V.B. Stepanov
Magazine of Civil Engineering , 2012,
Abstract: The problem of the reinforced concrete structures technical state assessment assumes the improvement of techniques of their nondestructive control. Therefore, the technique based on criterion of integral values of the crack opening width is proposed.This criterion can serve as independent parameter of corrosion damage. Average value of crack width allows estimating thickness of corrosion products for determination residual bond between concrete and reinforcement.The comparative analysis with a standard technique of measurement is carried out. Shortcomings of maximum crack width as a parameter of serviceability are shown. The integrated technique does possible correction, taking into account nonlinearity of a crack, size of concrete layer, excludes manifestation of the methodical and subjective errors peculiar to a standard technique of measurement.
Meliolales of India Volume-II
V.B. Hosagoudar*
Indian Phytopathology , 2011,
Abstract:
Meliolaceae of Kerala, India – XXII
V.B. HOSAGOUDAR
Indian Phytopathology , 2012,
Abstract: This paper gives an account of ten new meliolaceous fungi, namely, Asteridiella justiciae, Meliola ardisiicola, M. cannonicola, M. chassaliicola, M. desmodii-velutini, M. erythroxylicola, M. urariae, M. pseudarthriae, M. strychnigena and M. tylophorae-indicae. All these species are described and illustrated in detail.
Contribution of Frenkel's theory to the development of materials science
Pavlovi? V.B.
Science of Sintering , 2006, DOI: 10.2298/sos0601003p
Abstract: The original and comprehensive research of Yakov Ilich Frenkel in physics and physical chemistry of condensed states, nuclear physics, electrodynamics, science of sintering has significantly contributed to the development of modern scientific knowledge and his scientific ideas are still an inspiration to many scientists. Having in mind the wealth of scientific ideas he had in the research of electroconductivity in metals, crystal structure imperfections and phase transitions and in founding the science of sintering, the contribution of individual theories of Frenkel of significance to materials science are presented in this paper.
Relaxation dynamics near ferroelectric phase transitions and the central-peak phenomenon
Kokshenev V.B.
Brazilian Journal of Physics , 2000,
Abstract: The instability of the paraelectric phase in ferroelectrics, driven by thermal fluctuations, is discussed on the basis of the quantum three-dimensional spin-1/2 transverse-field Ising model (TIM) within the framework of the Green function method. The two-step critical dynamics of the TIM is analyzed through the ferroelectric order-parameter fluctuation spectra observed above the critical temperature Tc. The spectra profiles are given near Tc in explicit form. The slow-down exponents deltac = and deltas = are deduced for the slow and fast parts of structural relaxation and are compared with those known from the literature.
Electrochemical Photovoltaic Detector With Pseudo-Binary Hgxcd1-Xte Thin Film Photoelectrodes
V.B.PUJARI
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: :Electrochemical photo-voltaic detector with REDOX reactions occurring at the two electrodes was designed, fabricated and characterized through its characteristic properties. The photosensitive material used was HgxCd1-xTe (0 ? x ? 0.5) and sodium polysulphide electrolyte was used as a medium of charge transport from one electrode to another. The various designing and processing parameters were optimized to yield quality photo electrode material and the photo-voltaic detector cells were fabricated for each of these electrodes. The photo-voltaic detector performance was then tested through its current-voltage, capacitance-voltage, power output, spectral and photo response studies. The quantum conversion efficiency ?% and fill factor ff % are found to be enhanced from 0.24% to 0.55% and 30% to 49% respectively, when the composition parameter varied from zero to 0.1. The other performance parameters were also evaluated from their characteristic studies and in turn their variations are correlated with electrode materials composition. A best electrode composition is searched out from these studies.
Ser poeta: Lupe Cotrim, 40 anos depois
Gouvêa, Leila V.B.;
ARS (S?o Paulo) , 2010, DOI: 10.1590/S1678-53202010000100012
Abstract: this paper presents a résumé of the events being poet: lupe corim, 40 years afterwards, promoted by instituto de estudos brasileiros of universidade de s?o paulo (ieb-usp) in march 2010. beyond a seminar about the life and work of the teacher and poetess, the events had included an exposition of her private records' pieces, recently incorporated into the archives of the ieb; and a recital that had presented the première of songs recently composed by almeida prado on some lupe cotrim's poems.
Effect of H2SO4 addition on the corrosion behaviour of AISI 304 austenitic stainless steel in methanol-HCl solution
V.B. Singh and Monali Ray
International Journal of Electrochemical Science , 2007,
Abstract: Effect of sulphuric acid addition on the corrosion behaviour of AISI 304 austenitic stainless steel was investigated in different concentrations of HCl (0.001 – 1.0 M) in methanol using potentiostatic polarization, cyclic anodic polarization and open-circuit potential (OCP) measurements. In methanol-HCl solution, only active anodic dissolution occurred and the rate of corrosion increased with concentration of HCl. Scanning electron microscopic studies revealed grain boundary attack of the specimen. The addition of H2SO4 into methanol-HCl solutions with H2SO4 to HCl concentration ratio 3 10:1 stimulated the dissolution rate in the active region, but at higher potentials, facilitated passivation with occurrence of pitting on the steel surface. Increase in H2SO4 concentration enhanced passivity by broadening the range of passivity and making the pitting potential (Epit) and the protection potentials (Eprot) nobler due to higher inherent water content of H2SO4. Simultaneously, the passivation current density (ip) also increased indicating the formation of a more defective passive film probably due to higher acidity of the solution.
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