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Krasnoyarsk, Russia

Siberian Federal University is a modern multidisciplinary university located in the eastern part of Russia, Krasnoyarsk, that combines fundamental and applied research and teaching.The University holds top positions in Russian universities' rankings: 12—14 place in the total National Rating of Universities , 7—8 place in the section "Innovations and Entrepreneurship", 6—10 place in the section "Education". The Siberian Federal University was ranked #14 among Russian universities in the international rankings "Web of Science" and "Ranking Web of World Universities". The Siberian Federal University participates in the international collaboration and integration into international research and education space.The Universities' fundamental and applied research is closely connected with Institutions of the Siberian Branch of the Russian Academy of science ; many scienties from these institutions are professors and lecturers in the SibFU. The Siberian Federal University has its own large university press, which includes the Scientific Journal of the Siberian Federal University.The University was established in 2006 by merging four large universities of Krasnoyarsk city that had been training professionals in the most competitive sectors of economy in Siberia and the Far East: Krasnoyarsk State University, Krasnoyarsk State Technical University, Krasnoyarsk State Academy of Architecture and Construction and Krasnoyarsk State University of Non-Ferrous Metals and Gold.Today Siberian Federal University is the largest higher educational institution in Siberia and consists of 19 Institutes with more than 3,000 faculty staff teaching 41,000 students. The Chairman of the University Board of Trustees is Dmitry A. Medvedev, the Prime Minister of the Russian Federation. Wikipedia.

Shuvaev A.,Siberian Federal University
Cell Biochemistry and Biophysics | Year: 2014

Fitness cost is the measure of the metabolic burden of unneeded gene expression. It is defined as the lag in bacterial cells growth harboring unneeded genes relative to unburdened cells. Separate cells can concurrently adapt to the burden, demonstrating a decrease in or even a disappearance of the lag. The precise mechanisms of this adaptation are not clearly understood. One possibility is that an increased amount of free ribosomes "absorb" the unnecessary burden. In this work, the mechanism by which an increased concentration of ribosomes could result in faster growth and mask the unneeded gene expression burden is discussed. The initiation time of chromosome replication by the initiator protein DnaA, for which the accumulation speed depends on the ribosomes amount, is taken into account. © 2014 Springer Science+Business Media New York. Source

Gavrikov V.L.,Siberian Federal University
European Journal of Forest Research | Year: 2014

A geometrical model of a forest stand has been analyzed. A forest stand has been modeled as a population of cones which was described by the change of total bole surface area with density $$\hat{S}(N)$$S^(N), relation between density and a horizontal dimension (radius r) r(N), and the relation between vertical dimension (generatrix l) and radius l(r). It has been shown that there are close relationships between $$\hat{S}(N)$$S^(N), l(r) and r(N). In case of $$\hat{S}(N) = const$$S^(N)=const, power exponent of l(r) can be predicted from the power exponent of r(N) and vice versa. A comparison of the model analysis with the data available on Scots pine (Pinus sylvestris L.) stands has been performed. In spite of the model simplicity, its inferences proved to be workable in many cases where the data can be interpreted as a dynamics of an even-aged forest stand. In particular, if the estimation of total bole surface area is constant, the power exponent in the relation of diameter and stand density DBH(SD) can be calculated on the basis of the power exponent in the relation of height and diameter H(DBH) and vice versa. Possible limitations and the meaning of the analysis are discussed. © 2014, Springer-Verlag Berlin Heidelberg. Source

Ryzhkov I.I.,Russian Academy of Sciences | Minakov A.V.,Siberian Federal University
International Journal of Heat and Mass Transfer | Year: 2014

Laminar convective heat transfer of water-alumina nanofluid in a circular tube with uniform heat flux is investigated numerically on the basis of two-component model, which takes into account nanoparticle transport by diffusion and thermophoresis. A new expression for thermophoretic mobility is suggested on the basis of existing experimental results and theoretical concepts. It is shown that thermophoresis leads to a significant reduction of nanoparticle volume fraction in the boundary layer near the wall. The corresponding viscosity reduction causes the velocity increase near the wall and flattening of velocity profile near the tube axis to keep the mass flow rate constant. The decrease of wall shear stress leads to the decrease of the required pressure drop. The calculations for two-component model provide higher values of the local and average heat transfer coefficients in comparison with the one-component model. The difference does not exceed 10% and decreases with increasing the thermal Peclet number. The calculations for one-component model show the independence of local and average Nusselt numbers on the nanoparticle volume fraction. The results for two-component model predict the increase of Nusselt number when the thermophoretic effect becomes stronger. The effectiveness of water-alumina nanofluid is analyzed by plotting the average heat transfer coefficient against the required pumping power. It is shown that the nanofluid shows better performance than the base fluid in the range of low pumping power and, correspondingly, low inlet velocity. © 2014 Elsevier Ltd. All rights reserved. Source

Zakhvataev V.E.,Siberian Federal University
Biophysics (Russian Federation) | Year: 2015

Possible scenarios for synchronization of some biological processes with variations in the lunisolar gravitational tide acceleration are considered with regard to the trigger influence of the tidal force on the geological environment and the relevant modulation of the emanation and activity fields of radon and other radioactive elements. Mechanisms and models of the sensitivity of living systems to tidal variations of natural background radiation, including mitochondrial permeability transition, generation of reactive oxygen and nitrogen species, bystander factors, secondary biogenic radiation, modulation of cell signaling, and rhythmic gene expression, are discussed. © 2015, Pleiades Publishing, Inc. Source

Discharges from the Mining-and-Chemical Combine (MCC) of Rosatom, downstream from Krasnoyarsk, resulted in radioactive contamination of sediments of the River Yenisei. The concentration of artificial gamma-emitting radionuclides ( 137Cs, 60Co, 152Eu, and 241Am) was determined with the objective to analyze the migration processes leading to the transport of these radionuclides. The content of artificial radionuclides in the surface layers of the study area varied in wide ranges: 137Cs-318- 1,800 Bq/kg, 60Co-87-720 Bq/kg, 152Eu-12- 287 Bq/kg and 241Am-6-76 Bq/kg. There was a sequence of migration of radionuclides investigated in the surface layer of sediments that were collected in the near zone of influence of the MCC: 241Am≈ 152Eu> 60Co> 137Cs. Radionuclide species have been found to be directly related to sediment structure and composition. © Springer Science+Business Media B.V. 2011. Source

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