Vol 18, No 3.1 (2012)

Статьи

ABOUT ONE PROBLEM OF THE APPROXIMATION THEORY

Abakumov Y., Verhoturova M., Kogan E.

Abstract

In the given article the solution of the problem of finding of accurate constants by methods of summation of Fourier series is considered. The number of results belonging to the constants , the existence of parameters are also set forth.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):5-13
pages 5-13 views

A BOUNDARY VALUE PROBLEM FOR DEGENERATIVE SYSTEMOFEQUATIONS OFBITSADZE – YANUSHAUSKAS

Abdrakhmanov I., Abdrakhmanova R.

Abstract

In the article, a boundary value problem for a singular many-dimensional system of elliptic type equations in half-space is considered.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):14-19
pages 14-19 views

SOLVING NOT COMPLETELY INTEGRABLE QUANTILE PFAFFIAN DIFFERENTIAL EQUATIONS

Melkumova L., Shatskikh S.

Abstract

The present work deals with quantile Pfaffian differential equations which are constructed using two-dimensional conditional quantiles of multidimensional probability distributions. As it was shown in [3] in case when the initial probability distributions have reproducible conditional quantiles this kind of Pfaan equations is completely integrable and the integral manifold is the conditional quantile of maximum dimension. In this paper we discuss properties of integral manifolds of maximum possible dimension for quantile Pfaffian equations which are not completely integrable. Manifolds of this type are described in terms of conditional quantiles of intermediate dimensions.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):20-39
pages 20-39 views

ORDER REDUCTION OF OPTIMAL ESTIMATION PROBLEM FOR LANGEVIN EQUATION

Osintsev M.

Abstract

The question under discussion in this paper is the optimal estimation for singular perturbed Langevin equation. On the basis of assumptions about parameters and conditions where the movement is performed, we choose three cases which have curtain peculiarities during the reduction of the optimal estimation problem. For order reduction task the theoretical method of integral manifolds is used. It allows to get the solution of Riccati equations for covariance matrix of the filter and build the corrected Kalman–Bucy filter of a lower dimension
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):40-53
pages 40-53 views

COMMUTATIVE LEIBNIZ-POISSON ALGEBRAS OF POLYNOMIAL GROWTH

Ratseev S.

Abstract

In this paper we study commutative Leibniz-Poisson algebras. We prove that a variety of commutative Leibniz-Poisson algebras has either polynomial growth or growth with exponential not less than 2, the field being arbitrary. We prove that every variety of commutative Leibniz-Poisson algebras of polynomial growth over a field of characteristic 0 has a finite basis for its polynomial identities. Also we construct a variety of commutative Leibniz-Poisson algebras with almost polynomial growth.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):54-65
pages 54-65 views

RADEMACHER CHAOSES AND BERNOULLI POLYNOMIALS

Sukhanov R.

Abstract

In this paper we prove that any Bernoulli polynomial of even (odd) order is an absolutely convergent series of functions from some Rademacher chaoses, each of them is of even (odd) order
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):66-73
pages 66-73 views

”DIGITAL DELETION” GAME AND RELATED ROOK GAME MISERE

Frolov I.

Abstract

In this paper we investigate some properties including ultimate arithmetical periodicity of the function generated with the game ”Digital deletion”, and also the inverse function which is the Sprague-Grundy function for the misere form of rook game.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):74-82
pages 74-82 views

ABOUT A NON-LINEAR TASK ON EIGENVALUES INCURRING FROM THE ANALYSIS OF TENSIONS AT THE FATIGUE CRACK TIP

Adylina E., Igonin S., Stepanova L.

Abstract

An analytical solution of the nonlinear eigenvalue problem arising from the fatigue crack growth problem in a damaged medium in coupled formulation is obtained. The perturbation technique is used. The method allows to find the analytical dependence of eigenvalue on parameters of the kinetic equation of the damage evolution law.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):83-102
pages 83-102 views

PROPAGATION OF NONLINEAR WAVES IN CHANNELS WITH VARIABLE CROSS-SECTION, LED TO THE GAS HYDRATE FORMATION

Galimzianov M., Lepikhin S., Chiglintsev I.

Abstract

The phenomena related with shock wave propagation in variable cross-section channels filled with bubbles liquid containing hydrate-generative gas are considered. The possibility of intensification of hydrate-generative process due to the increasing of bubbles subdivision because of wave amplitude rising provided by channel geometry.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):103-115
pages 103-115 views

SYNCHRONIZATION OF FRACTIONAL VAN-DER-POL OSCILLATOR

Zaitsev V., Karlov A., Stulov I.

Abstract

A model of self-oscillating system with a differential equation of motion of fractional order under the action of external harmonic signal is proposed. Solutions of equation of motion which correspond to the regime of steady-state synchronized oscillations and the regime of beats near the synchronization band are obtained in the quasiharmonic approximation. The amplitude frequency and phase-frequency characteristics of synchronization of fractional Van-der-Pol oscillator are analyzed. An analogy between the generator with a fractional feedback circuit and the generator with delayed feedback is established.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):116-122
pages 116-122 views

MONOATOMIC ALCOHOLS IN A SYSTEM ”FORMATION WATER–n-DODECANE”

Arutunov U., Efremov A., Onuchak L., Dudikov V.

Abstract

The paper presents the experimental research of distribution of nine С1–С5 aliphatic monoatomic alcohols of normal and isomeric structure in a two-phased heterogenous system ”formation water–n-dodecane” using gas-chromatography method for the purpose of a choice of the most effective tracers for the characterization of filtrational streams and oil saturation when waterflooding. There were defined distribution constants K_с in interval of temperatures 25–75С on which basis appeared the conclusion that alcohols С1–С3 can be used as water (non-partitioning) tracers whereas alcohols С4–С5 approach for a role of partitioning tracers.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):123-131
pages 123-131 views

SYNTHESIS OF N-NITROPHENYL DERIVATIVES OF 1-ADAMANTYL-CONTAINED AMIDES

Goryachkina A., Ermokhin V., Purygin P.

Abstract

A series of 1-adamantylacetamides with potential antimicrobic activity is synthesized from 2-, 3-, 4-nitroanilines, 2-nitro-4-methylaniline, 2,6-dichloro-4-nitroaniline.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):132-136
pages 132-136 views

CREATION OF ARTIFICIAL CLOUDS OF ALKALINE AND ALKALINE EARTH METALS AZIDES IN THE UPPER ATMOSPHERE

Drobyzhev A., Mokrov A., Kukushkin I., Pyzhov A., Rekshinskiy V., Purygin P.

Abstract

The results of longstanding investigation of developing and natural testing of devices for the spherical clouds creation from vaporized alkaline and alkaline earth metals azides in the upper earth atmosphere are given in the following article.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):137-144
pages 137-144 views

THE STUDY OF INTERACTIONS IN THE SYSTEM OF ”BORIC ACID-UREA” BY THE METHOD OF INFRARED-FURIE SPECTROMETRY

Lobachev A., Lobacheva I., Revinskaya E., Redkin N.

Abstract

The possibility of usage of method of infrared spectrometry with Furie transformation for the investigation of the depth of the flow of interactions in the system of ”boric acid-urea” is investigated. It is shown that infrared spectrum reflects even the smallest changes of the structure of the given system very good. The investigation of the influence of temperature, duration of heating, and correlation of components of the technical mixture ”boric acid-urea” on the process of their interaction is carried out.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):145-155
pages 145-155 views

THE ESTIMATION OF HYDROPHOBICITY AND THE ANALYSIS OF HYDROGEN BONDS IN THE MOST PERSISTENT CONFORMERS OF MOLECULES OF SYNTHESIZED ADAMANTYL-CONTAINING TRIPEPTIDES

Obukhov S., Purygin P., Stepanov E., Zarubin Y.

Abstract

Adamantyl-containing tripeptides with potential antiviral activity are synthesized. Applying methods of computational chemistry hydrophobic properties were estimated. Search of the most persistent conformers was made and the analysis of intramolecular hydrogen bonds to these peptides was performed.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):156-163
pages 156-163 views

SORPTION PROPERTIES OF THE MIXED STATIONARY PHASE ”POLYDIMETHYLSILOXANE-/beta-CYCLODEXTRIN” IN GAS CHROMATOGRAPHY

Platonov V., Kuraeva J., Onuchak L., Kazurov D., Goncharova I.

Abstract

Sorption and selective properties of the mixed stationary phase based on polydimethylsiloxane and methylated-beta-cyclodextrin were studied by gas chromatographic method in the temperature range 60–180С. It is also established that introduction of macrocyclic adding in polymeric immovable phase results in increasing sorption of organic compounds of different classes (apart from n-alkanes C6-C10 and cyclogegsan) and showing of enantioselectivity, more pronounced for cyclic compounds with polar substituents. A greater role of entropy factors acting in the mixed polymer phase on the sorption of sorbates redistribution
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):164-172
pages 164-172 views

THE INVESTIGATION OF POSTPYROGENIC PROCESSES IN NATURAL AND ANTHROPOGENIC PINE FORESTS OF SAMARA REGION

Antypova A., Prokhorova N.

Abstract

The comparative analysis of postpyrogenic processes development in natural pine forests in Zhigulevsky nature reserve and anthropogenic pine forests in Krasnosamarsky forest is given in the article.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):173-179
pages 173-179 views

ROTATORIA OF FLATLAND LAKE NEAR SOUTH BRIDGE OF SAMARA CITY IN 2008

Gherasimov Y.

Abstract

66 species and 2 morphs of Rotatoria (37 genus and 21 familiars) was found in the flatland lake near South Bridge across Samara river. Seasonal dynamics of Rotatoria population is quoted.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):180-185
pages 180-185 views

FEEDING VARIABILITY OF ROUND GOBY NEOGOBIUS MELANOSTOMUS (PERCIFORMES, GOBIIDAE) OF SARATOV RESERVOIR

Kirilenko E., Shemonaev E.

Abstract

Seasonal and annual feeding dynamics of round goby Neogobius Melanostomus in Saratov Reservoir were investigated. During the research period food basis consisted of mollusks of genus Dreissena, other groups of zoobenthos were represented insignificantly. Seasonal changes of food spectrum and feeding objects ratio were caused by their biological development.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):186-191
pages 186-191 views

COMPARATIVE ANALYSIS OF SOME BEHAVIORAL REACTIONS BY CHILDREN AND CHIMPANZEE IN THE PROCESS OF ACHIVEMENT THE GOAL WITH DIFFERENT SUBJECTIVE VALUE

Kuznetsova T., Gorbacheva M.

Abstract

The behavior of preschool children and chimpanzee was probed in the process of achievement the goal, approached with different speed and possessing different value. It is detected that on the force of aspiring to possessing a purpose not only speed of movement of object, or time which it will be attained with, but also its subjective value is influenced. Decline of speed of approaching object notwithstanding the dependency upon a kind of test subjects invariably led to lowering of productivity of instrumental reactions, diminishing of active time of tracking after the approached object, to the change of tactics of management by an experimental device.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):192-202
pages 192-202 views

HEART RATE VARIABILITY OF STUDENTS WITH DIFFERENT PROFILES OF MOTOR DOMINATION DURING EXAM

Lukina A.

Abstract

It is established hat changing of parameters of student’s electrocardiogram during the exam are shown by shortening of the intervals RR, QT, PQ, and the complex QRS, thus expressiveness of reactions dominates in sample of lefthanders and ambidexters. The values of wave parameters of heart rate variability, including spectral power of heart rate fluctuations in different frequency ranges, increase in left-handers, while ambidexterity and right handed down. The values of statistical indices of HRV, including SDNN, RMSSD and mode cardio intervals in students during the exam are reduced, and also to a greater extent, and ambidexterity for lefties. These changes corresponded to increasing trend of the index and the activity coefficient Baevsky sympathetic nervous system, indicating a greater intensity of regulatory mechanisms in individuals with left profile of motor domination.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):203-209
pages 203-209 views

COMPARATIVE ANALYSIS OF RESPIRATORY REACTIONS TO MICROINJECTION OF GABA AND PENICILLIN INTO THE BOTZINGER COMPLEX AND THE PRE-BOTZINGER COMPLEX IN RATS

Manshina N., Vedyasova O.

Abstract

In acute experiments on anesthetized rats, the respiratory responses to local administration of GABA (10^{-5}М) and noncompetitive GABAA antagonist penicillin (10^{-7} М) into B¨otzinger complex (BC) and pre-B¨otzinger complex (PBC) were studied. The differences in the responses of respiratory frequency, inspiratory and expiratory duration after injection of GABA into the BC and PBC were found. The effects were more pronounced when GABA administered into the PBC. It is shown that the response of tidal volume, in contrast, was more frequent when both GABA and penicillin injected into the BC. The question of the role of GABA receptors of BC and PBC in the realization of the inhibitory action of GABA on the temporal and volumetric parameters of breathing pattern is discussed.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):210-218
pages 210-218 views

CONCERNING THE ROLE OF XENOBIOTIC STRUCTURE IN THE BIOLOGICAL ANSWER (ON THE EXAMPLE OF BENZOTRIAZOLE)

Selezneva E., Valieva E., Tengayev E., Belousova Z.

Abstract

The toxicity and cytogenetic activity for Allium fistulosum were investigated for six imidazole derivates 4-(1-Н-benzotriazole-1-ilmetyl)phenol, 1-benzylbenzotriazole, 1-[4-(benzyloxy)benzyl]-1H-benzotriazol, 1-[2-(benzyloxy)benzyl]-1H-benzotriazole, 2-(1-Н-benzotriazole-1-ilmetyl)phenol, 1-[4-(3-fenolpropoxy)benzyl]-1-Нbenzotriazole. The substances with OH- and benzyl groups in para-position were more toxic. Depending on their molecular structure the substances blocked the proliferative activity on different mitosis stages. All the substances demonstrated mutagenic activity. The role of molecular structure in biological answer development is discussed in the article.
Vestnik of Samara University. Natural Science Series. 2012;18(3.1):219-225
pages 219-225 views

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