Russian University of Cooperation

Kazan, Russia

Russian University of Cooperation

Kazan, Russia
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Kargin V.I.,Mordovia State University | Zaharkina R.A.,Russian University of cooperation
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2016

Having multifunctional effect on environment, forest shelterbelts normalize ecological conditions and form stable agroforest landscapes with high self-regulations. The researches have been carried out in the fields of Oktyabrsky district near the city of Saransk, protected by parallel oak and ash shelterbelts (the width is 23 m, the height of trees is 21 m), which were planted in 1949. Observation and analyses were carried out according to the standard techniques. The maximal species richness of ground beetles is concentrated in shelterbelts and its boundaries. Shelterbelts promote the spreading of forest and forest-swamp ground beetle species over the contiguous fields. The shelterbelts promote the spreading of large and very large sizes ground beetles over the contiguous fields. © 2010 RJPBCS.


Maksimov I.I.,Chyvash State Agricultural Academy | Maksimov V.I.,Chyvash State Agricultural Academy | Vasil'ev S.A.,Chyvash State Agricultural Academy | Alekseev V.V.,Russian University of Cooperation
Eurasian Soil Science | Year: 2016

A new method has been proposed for simulating the development of a channel on sloping surface of an agrolandscape by the point source method. To study the direction and rate of channel development by the slope flow, it is proposed to take into consideration both the flow parameters and the gradient of erosion resistance potential, which represents the water flow energy necessary for the erosion of unit soil mass and its removal from the zone of its natural occurrence. The approach used makes it possible to restore the general situation from the experimental data. The proposed theoretical premises about the effect of the surface shape and state on the channel development have been confirmed by laboratory studies. From the results of these studies, a relationship of the channel development direction with the erosion resistance potential and the flow velocity has been derived. © 2016, Pleiades Publishing, Ltd.


Ol'shanskaya L.N.,Saratov State Technical University | Lazareva E.N.,Saratov State Technical University | Bulkina L.A.,Russian University of Cooperation
Chemical and Petroleum Engineering | Year: 2016

Extraction of nickel, iron, and zinc hydroxides and metallic nickel from galvanic sludges of Saratov Region industries is reported. It was established that the products could be used to produce pigments and fillers for paints and to fabricate rechargeable cathodes of chemical current sources (Ni–Cd and Ni–Fe batteries). © 2016 Springer Science+Business Media New York


Fedorov E.G.,Russian University of Cooperation | Yanyushkina N.N.,Volgograd State University | Belonenko M.B.,Entropique Inc.
Technical Physics | Year: 2013

We consider the response of a quasi-one-dimensional ballistic carbon ring to the field of an electromagnetic wave propagating along the normal to the ring plane in the presence of a constant electric field collinear to the field of the wave. The dipole moment and the radiation intensity of the ring are calculated for the ballistic motion of a conduction electron. The possibility of implementation of regular periodic and chaotic regimes of ring emission under the action of external fields is demonstrated. The radiation spectrum of the ring is analyzed, and the dependence of the scattering cross section for an electromagnetic wave incident on the ring on its frequency and amplitude is calculated. © 2013 Pleiades Publishing, Ltd.


Krishtafovich V.,Russian University of Cooperation | Krishtafovich D.,Russian Customs Academy | Belkin Y.,Plekhanov Russian University of Economics | Gubarev R.,International University in Moscow
Pakistan Journal of Nutrition | Year: 2016

The results of microstructural research of powdery animal protein additives produced from pork collagen-containing connective tissue and blood plasma are presented. The analyzed samples had similar composition of collagen and elastin animal proteins. Generally, a protein agent based on animal connective tissue fibers only or in combination with granular eosinophilic protein of a different biological origin is taken as a sample. The rate of hydrolytic changes of connective tissue intercellular substance during technological processing of agents was found different. Plant protein and carbohydrate components were not found. © Asian Network for Scientific Information, 2016.


Fedorov E.G.,Russian University of Cooperation | Zhukov A.V.,Wilfrid Laurier University | Zhukov A.V.,Entropique Scientific Research Inc. | Belonenko M.B.,Entropique Scientific Research Inc. | And 2 more authors.
European Physical Journal D | Year: 2012

We study the propagation of two-dimensional bipolar electromagnetic pulses in an array of semiconducting carbon nanotubes. The electromagnetic field in such an array is described by Maxwell's equations, reduced to a nonlinear wave equation. The initial field distribution is given in the form of the breather sine-Gordon equation, restricted by a Gaussian profile in a plane perpendicular to the direction of the momentum. The numerical solution of the wave equation shows the possibility of propagation of the electromagnetic breather in an array of nanotubes. We reveal the nature of the evolution of the breather's shape and obtain the time dependence of its amplitude. We find that the breather, propagating in an array of nanotubes, is resistant to spreading and can travel a distance ̃10-3 / 10 -2 cm. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2012.


Slavkin V.V.,Russian University of Cooperation | Tishchenko E.A.,Russian Academy of Sciences
Low Temperature Physics | Year: 2014

In-phase and quadrature components of the first harmonic response of polycrystalline YBa2Cu3O7-x, were measured in a dc magnetic field. For small field modulation amplitude of 0.005 Oe, in-phase component of the first harmonic response of a sample was found to be proportional to the differential magnetic susceptibility. It was found that there is no pinning of Josephson vortices in a weakly coupled medium in magnetic fields below Hc2J, where Hc2J is the upper critical field of Josephson weak links. The obtained initial magnetization curve allowed us to describe the nonlinear part of the magnetization arising due to the weak bonds in ceramics. The size of a Josephson vortex and the critical parameters Hp, Hc2J and Hc1g were evaluated. © 2014 AIP Publishing LLC.


Slavkin V.V.,Russian University of Cooperation | Tishchenko E.A.,Russian Academy of Sciences
Technical Physics | Year: 2012

A setup for measuring cophasal and quadrature components of higher harmonics of an electromotive-force signal of the response of a high-temperature superconductor makes it possible to study nonlinear magnetic properties of superconductors in variable magnetic fields of up to 1 kOe and constant magnetic fields of up to 10 T in the temperature range of 5-300 K. This setup was used to measure the temperature dependences of the absolute values of the real and imaginary parts of the first and third harmonics of the magnetization of textured Yba 2Cu 3O 7 - x polycrystalline samples in the temperature range of 77-220 K at various values of variable and constant magnetic fields. An analysis of resulting data made it possible to reveal the presence of different dynamical modes of the magnetic flux in YBa 2Cu 3O 7 - x that were dominant in different temperature ranges. The nonlinearity of the magnetization of YBa 2Cu 3O 7 - x (the appearance of higher harmonics) was observed up to temperatures in the range of T = 103-112 K, which were substantially higher than the temperature of the transition of this compound to a superconducting state. The observed feature in the magnetization of YBa 2Cu 3O 7 - x was associated with the emergence of a pseudogap state in this compound. © 2012 Pleiades Publishing, Ltd.


Larionov V.M.,Kazan Federal University | Mitrofanov G.A.,Kazan Federal University | Kozar A.N.,Russian University of Cooperation
Journal of Physics: Conference Series | Year: 2016

The article presents the results of experimental studies of combustion instability in the pulse combustor. Propane-air mixture is burned in the chamber with the flame holder. It was experimentally found that feeding high-frequency sound vibrations into the combustion chamber causes the suppression of pulsating combustion. The oscillation frequency ranges in 870 to 1400 Hz. This corresponds to 9-12 resonance frequencies of oscillations in the combustor. The physical mechanism of the observed phenomenon consists in changing the conditions of formation and destruction of fuel jets in the vortex zone behind the flame holder.


Larionov V.M.,Kazan Federal University | Mitrofanov G.A.,Kazan Federal University | Sachovskii A.V.,Kazan Federal University | Kozar N.K.,Russian University of Cooperation
Journal of Physics: Conference Series | Year: 2016

The article discusses the results of an experimental study of the effect of water vapor at the flame temperature. Propane-butane mixture with air is burning on a modified Bunsen burner. Steam temperature was varied from 180 to 260 degrees. Combustion parameters changed by steam temperature and its proportion in the mixture with the fuel. The fuel-air mixture is burned in the excess air ratio of 0.1. It has been established that the injection of steam changes the characteristics of combustion fuel-air mixture and increase the combustion temperature. The concentration of CO in the combustion products is substantially reduced. Raising the temperature in the combustion zone is associated with increased enthalpy of the fuel by the added steam enthalpy. Reducing the concentration of CO is caused by decrease in the average temperature in the combustion zone by applying steam. Concentration of active hydrogen radicals and oxygen increases in the combustion zone. That has a positive effect on the process of combustion.

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