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Sample records for aleksandrov jaanus purga

  1. On the Aleksandrov-Bakel'man-Pucci Estimate for Some Elliptic and Parabolic Nonlinear Operators

    NASA Astrophysics Data System (ADS)

    Argiolas, Roberto; Charro, Fernando; Peral, Ireneo

    2011-12-01

    In this work we prove the Aleksandrov-Bakel'man-Pucci estimate for (possibly degenerate) nonlinear elliptic and parabolic equations of the form -div left( Fleft( nabla u(x)right) right) =fleft(xright) quad in Ω subset mathbb{R}n and ut(x,t)-div left( Fleft( nabla u(x,t)right) right) =fleft( x,tright) quad in Qsubset mathbb{R}^{n+1} for F a {fancyscript{C}^1} monotone field under some suitable conditions. Examples of applications such as the p-Laplacian and the Mean Curvature Flow are considered, as well as extensions of the general results to equations that are not in divergence form, such as the m-curvature flow.

  2. JPRS Report, Science & Technology, USSR: Science & Technology Policy

    DTIC Science & Technology

    2007-11-02

    First Deputy Chairman of the USSR State Committee for Science and Technology Ivan Bortnik and Aleksey Aleksandrov, chief of the legal department of...First Deputy Chairman of the USSR State Committee for Science and Technology Ivan Bortnik and Aleksey Aleksandrov, chief of the legal department...director of the Vneshtekhnika All-Union Cost Accounting Foreign Trade Association, by B. Pavlov : "The Concern of Intellectuals, Which Will Save Our

  3. Literacy Update. Volume 19, Number 1

    ERIC Educational Resources Information Center

    Gallagher, Jan, Ed.

    2009-01-01

    This newsletter, published five times a year, features articles on issues of concern to adult, family, and youth literacy practitioners, as well as recommended resources, announcements, and teaching strategies. This issue includes: (1) Literacy Zones Fight Poverty and Close Education Gaps (Robert Purga); (2) Staying at the Table: Building a…

  4. Literacy Update. Volume 19, Number 1

    ERIC Educational Resources Information Center

    Gallagher, Jan, Ed.

    2009-01-01

    This newsletter, published five times a year, features articles on issues of concern to adult, family, and youth literacy practitioners, as well as recommended resources, announcements, and teaching strategies. This issue includes: (1) Literacy Zones Fight Poverty and Close Education Gaps (Robert Purga); (2) Staying at the Table: Building a…

  5. Scintillation of Light from Distant Objects due to Anisotropic and Non-Kolmogorov Turbulence

    DTIC Science & Technology

    2013-09-01

    turbulence is present in the troposphere [8-9]. At higher, altitudes, in the stratosphere , turbulence that is layered, anisotropic and non-Kolmogorov... stratospheric turbulence on star image motion,” Proc. SPIE 3126, 113-123, 1997. 5. M. Vorontsov, G. W. Carhart, V. S. Rao Gudimetla, T. Weyrauch, E. Stevenson...upper troposphere and lower stratosphere ,” Proc. SPIE 2110, 43-55, 1994. 10. A. P. Aleksandrov, G. M. Grechko, A. S. Gurvich, V. Kan, M. K. H

  6. Stainless Steels’ Resistance to Hydroerosion,

    DTIC Science & Technology

    1980-07-30

    Omel’chenko, engineer, S. L. Millichenko, A. G. Aleksandrov, Candidates of Technical Sciences Thanks to a high corrosion resistance stainless steels have...has great significance. The resistance to hydroerosion of several of the most common types of stainless steels which have roughly the same corrosion ...the failure is first localized in the ferrite phase and occurs by means of plastic deformation and the development of fatigue micro- cracks both

  7. Study of Porous Silicon Formation and Silicon-on-Porous Silicon Epitaxy (Computational Modelling)

    DTIC Science & Technology

    2000-01-01

    ate flow densities (0.2 bi- S1.8. layer/s<F< l bilayer/s) w does •1.6- T Knot depend upon F. Under this condition, the rate of all -6 1.4- processes...POROUS SILICON EPITAXY (COMPUTATIONAL MODELLING) P.L. Novikov, L.N. Aleksandrov, A.V.Dvurechenskii, V.A.Zinoviev Institute of Semiconductor Physics ...electrochemical etching is applied for p÷Si and p-Si substrates and takes into account the non-homogeneous surface charge distribution, the thermal generation

  8. Hydrolytic fragmentation of seed gums under microwave irradiation.

    PubMed

    Singh, V; Tiwari, A

    2009-03-01

    The seed gum solutions of Ipomoea purga, Ipomoea palmata, Ipomoea dasysperma, Cyanaposis tetragonolobus (Guar gum) and Crotolaria medicaginea were microwave (MW) irradiated and their degradation to oligo and monosaccharides was investigated. The gum solutions were fragmented into oligosaccharides/constituent monosaccharides depending upon the length of MW exposure in presence of catalytic amount of mineral acid or even when no acid was used. A mechanism for the microwave induced hydrolytic degradation of the seed gums has been proposed. The MW exposure time required for the partial and complete degradation of the gums was found dependent on the types of the linkages and degree of the branching present in the gums.

  9. Elastic properties of minerals

    SciTech Connect

    Aleksandrov, K.S.; Prodaivoda, G.T.

    1993-09-01

    Investigations of the elastic properties of the main rock-forming minerals were begun by T.V. Ryzhova and K.S. Aleksandrov over 30 years ago on the initiative of B.P. Belikov. At the time, information on the elasticity of single crystals in general, and especially of minerals, was very scanty. In the surveys of that time there was information on the elasticity of 20 or 30 minerals. These, as a rule, did not include the main rock-forming minerals; silicates were represented only by garnets, quartz, topaz, tourmaline, zircon, beryl, and staurolite, which are often found in nature in the form of large and fairly high-quality crystals. Then and even much later it was still necessary to prove a supposition which now seems obvious: The elastic properties of rocks, and hence the velocities of elastic (seismic) waves in the earth`s crust, are primarily determined by the elastic characteristics of the minerals composing these rocks. Proof of this assertion, with rare exceptions of mono-mineralic rocks (marble, quartzite, etc.) cannot be obtained without information on the elasticities of a sufficiently large number of minerals, primarily framework, layer, and chain silicates which constitute the basis of most rocks. This also served as the starting point and main problem of the undertakings of Aleksandrov, Ryzhova, and Belikov - systematic investigations of the elastic properties of minerals and then of various rocks. 108 refs., 7 tabs.

  10. 120th anniversary of the birth of Sergei Ivanovich Vavilov (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 30 March 2011)

    NASA Astrophysics Data System (ADS)

    2011-12-01

    A scientific session of the Physical Sciences Division of the Russian Academy of Sciences (RAS) dedicated to the 120th anniversary of the birth of Sergei Ivanovich Vavilov was held in the Conference Hall of the P N Lebedev Physical Institute, RAS, on 30 March 2011. The following reports were put on the session's agenda posted on the web site www.gpad.ac.ru of the Physical Sciences Division, RAS: (1) Masalov A V (P N Lebedev Physical Institute, RAS, Moscow) "S I Vavilov and nonlinear optics"; (2) Basiev T T (Laser Materials and Technology Research Center, A M Prokhorov General Physics Institute, RAS, Moscow) "Luminescent nanophotonics and high-power lasers"; (3) Vitukhnovsky A G (P N Lebedev Physical Institute, RAS, Moscow) "Advances in luminescent light sources and displays"; (4) Aleksandrov E B (Ioffe Physical Technical Institute, RAS, St. Petersburg) "Sergei Ivanovich Vavilov and the special theory of relativity"; (5) Bolotovsky B M (P N Lebedev Physical Institute, RAS, Moscow) "Vavilov-Cherenkov effect"; (6) Vizgin V P (S I Vavilov Institute of the History of Natural Scienses and Technology, RAS, Moscow) "Sergei Ivanovich Vavilov as a historian of science"; (7) Ginzburg A S (Knowledge Society) "Academician S I Vavilov — a devotee of the enlightenment and the first president of the Knowledge Society of the USSR". The papers written on the basis of reports 1-4 and 6 are given below. The main contents of report 5 is reflected in the paper "Vavilov-Cherenkov radiation: its discovery and application" [Usp. Fiz. Nauk 179 1161 (2009); Phys. Usp. 52 1099 (2009)] published earlier by B M Bolotovsky. • S I Vavilov and nonlinear optics, A V Masalov, Z A Chizhikova Physics-Uspekhi, 2011, Volume 54, Number 12, Pages 1257-1262 • Luminescent nanophotonics, fluoride laser ceramics, and crystals, T T Basiev, I T Basieva, M E Doroshenko Physics-Uspekhi, 2011, Volume 54, Number 12, Pages 1262-1268 • Advances in light sources and displays, A G Vitukhnovsky Physics

  11. Evidence of a halo formation mechanism in the Spallation Neutron Source linac

    NASA Astrophysics Data System (ADS)

    Jeon, Dong-O.

    2013-04-01

    A new halo formation mechanism and its mitigation scheme [D. Jeon, J. Stovall, A. Aleksandrov, J. Wei, J. Staples, R. Keller, L. Young, H. Takeda, and S. Nath, Phys. Rev. ST Accel. Beams 5, 094201 (2002)PRABFM1098-440210.1103/PhysRevSTAB.5.094201] are verified experimentally through a series of emittance measurements performed during the drift tube linac tank 1 commissioning of the Spallation Neutron Source. This is a rare experiment evidence of a halo formation mechanism. As the simulation predicts, the emittance measurements clearly show a visible halo reduction as well as a significant rms emittance reduction when the proposed round beam optics is employed. The emittance measurement results are consistent with multiparticle simulations and also consistent with wire scanner results. These measurements serve as a valuable code benchmarking for a beam under an intense space charge effect.

  12. Non-divergence parabolic equations of second order with critical drift in Lebesgue spaces

    NASA Astrophysics Data System (ADS)

    Chen, Gong

    2017-02-01

    We consider uniformly parabolic equations and inequalities of second order in the non-divergence form with drift \\[-u_{t}+Lu=-u_{t}+\\sum_{ij}a_{ij}D_{ij}u+\\sum b_{i}D_{i}u=0\\,(\\geq0,\\,\\leq0)\\] in some domain $\\Omega\\subset \\mathbb{R}^{n+1}$. We prove a variant of Aleksandrov-Bakelman-Pucci-Krylov-Tso estimate with $L^{p}$ norm of the inhomogeneous term for some number $p

  13. International Program and Local Organizing Committees

    NASA Astrophysics Data System (ADS)

    2012-12-01

    International Program Committee Dionisio Bermejo (Spain) Roman Ciurylo (Poland) Elisabeth Dalimier (France) Alexander Devdariani (Russia) Milan S Dimitrijevic (Serbia) Robert Gamache (USA) Marco A Gigosos (Spain) Motoshi Goto (Japan) Magnus Gustafsson (Sweden) Jean-Michel Hartmann (France) Carlos Iglesias (USA) John Kielkopf (USA) John C Lewis (Canada) Valery Lisitsa (Russia) Eugene Oks (USA) Christian G Parigger (USA) Gillian Peach (UK) Adriana Predoi-Cross (Canada) Roland Stamm (Germany) Local Organizing Committee Nikolay G Skvortsov (Chair, St Petersburg State University) Evgenii B Aleksandrov (Ioffe Physico-Technical Institute, St Petersburg) Vadim A Alekseev (Scientific Secretary, St Petersburg State University) Sergey F Boureiko (St.Petersburg State University) Yury N Gnedin (Pulkovo Observatory, St Petersburg) Alexander Z Devdariani (Deputy Chair, St Petersburg State University) Alexander P Kouzov (Deputy Chair, St Petersburg State University) Nikolay A Timofeev (St Petersburg State University)

  14. On some classical problems of descriptive set theory

    NASA Astrophysics Data System (ADS)

    Kanovei, Vladimir G.; Lyubetskii, Vasilii A.

    2003-10-01

    The centenary of P.S. Novikov's birth provides an inspiring motivation to present, with full proofs and from a modern standpoint, the presumably definitive solutions of some classical problems in descriptive set theory which were formulated by Luzin [Lusin] and, to some extent, even earlier by Hadamard, Borel, and Lebesgue and relate to regularity properties of point sets. The solutions of these problems began in the pioneering works of Aleksandrov [Alexandroff], Suslin [Souslin], and Luzin (1916-17) and evolved in the fundamental studies of Gödel, Novikov, Cohen, and their successors. Main features of this branch of mathematics are that, on the one hand, it is an ordinary mathematical theory studying natural properties of point sets and functions and rather distant from general set theory or intrinsic problems of mathematical logic like consistency or Gödel's theorems, and on the other hand, it has become a subject of applications of the most subtle tools of modern mathematical logic.

  15. Paleosols in depressions of the central Russian upland in the Early Valdai time

    NASA Astrophysics Data System (ADS)

    Pushkina, P. R.; Sycheva, S. A.

    2014-05-01

    The genesis, evolution, and paleoecology of soils of the Early Valdai interstadials were investigated in the Aleksandrov quarry (Kursk oblast), a key section of the Late Pleistocene deposits in the periglacial area of the East European Plain. The soils developed in the uppermost parts of the buried hollows (investigated in 2009) were compared with the soils developed in the lower parts of the same hollows (investigated in 1988). The data obtained suggest that the soils in the upper parts of the hollows were developed under wetter and, at the same time, more percolative water regime than the soils in the lower parts of the hollows. These soils were formed in a semihumid climate under the forest-steppe vegetation. Forest groves existed in the upper parts of the erosional network amidst herbaceous meadow steppes. In general, the soil cover pattern of the Early Valdai interstadials corresponded to the modern soil cover pattern within the analogous landscapes.

  16. Rationally convex sets on the unit sphere in ℂ2

    NASA Astrophysics Data System (ADS)

    Wermer, John

    2008-04-01

    Let X be a rationally convex compact subset of the unit sphere S in ℂ2, of three-dimensional measure zero. Denote by R( X) the uniform closure on X of the space of functions P/ Q, where P and Q are polynomials and Q≠0 on X. When does R( X)= C( X)? Our work makes use of the kernel function for the bar{δ}b operator on S, introduced by Henkin in [5] and builds on results obtained in Anderson Izzo Wermer [3]. We define a real-valued function ɛ X on the open unit ball int B, with ɛ X ( z, w) tending to 0 as ( z, w) tends to X. We give a growth condition on ɛ X ( z, w) as ( z, w) approaches X, and show that this condition is sufficient for R( X)= C( X) (Theorem 1.1). In Section 4, we consider a class of sets X which are limits of a family of Levi-flat hypersurfaces in int B. For each compact set Y in ℂ2, we denote the rationally convex hull of Y by widehat{Y}. A general reference is Rudin [8] or Aleksandrov [1].

  17. CONFERENCES AND SYMPOSIA: Seventy years of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Waves Propagation (IZMIRAN) (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 25 November 2009)

    NASA Astrophysics Data System (ADS)

    2010-08-01

    A scientific session of the Physical Sciences Division of the Russian Academy of Sciences dedicated to the 70th anniversary of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences (IZMIRAN) (Troitsk, Moscow region) was held in the conference hall of IZMIRAN on 25 November 2009. The following reports were put on the session agenda posted on the web site www.gpad.ac.ru of the Physical Sciences Division, RAS: (1) Gurevich A V (Lebedev Physical Institute RAS, Moscow) "The role of cosmic rays and runaway electron breakdown in atmospheric lightning discharges"; (2) Aleksandrov E B (Ioffe Physical Technical Institute, RAS, St. Petersburg) "Advances in quantum magnetometry for geomagnetic research"; (3) Dorman L I (IZMIRAN, Troitsk, Moscow region, CR & SWC, Israel) "Cosmic ray variations and space weather"; (4) Mareev E A (Institute of Applied Physics, RAS, Nizhnii Novgorod) "Global electric circuit research: achievements and prospects"; (5) Tereshchenko E D, Safargaleev V V (Polar Geophysical Institute, Kola Research Center, RAS, Murmansk) "Geophysical research in Spitsbergen Archipelago: status and prospects"; (6) Gulyaev Yu V, Armand N A, Efimov A I, Matyugov S S, Pavelyev A G, Savich N A, Samoznaev L N, Smirnov V V, Yakovlev O I (Kotel'nikov Institute of Radio Engineering and Electronics RAS, Fryazino Branch, Fryazino, Moscow region) "Results of solar wind and planetary ionosphere research using radiophysical methods"; (7) Kunitsyn V E (Lomonosov Moscow State University, Moscow) "Satellite radio probing and the radio tomography of the ionosphere"; (8) Kuznetsov V D (IZMIRAN, Troitsk, Moscow region) "Space Research at the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences." Papers based on reports 2-8 are published below. The main contents of report 1 are reproduced in A V Gurevich's review, "Nonlinear effects in the ionosphere" [Phys. Usp. 50

  18. Genesis, evolution, and catastrophic burying of the Ryshkovo paleosol of the Mikulino Interglacial (MIS 5e)

    NASA Astrophysics Data System (ADS)

    Sycheva, S. A.; Sedov, S. N.; Bronnikova, M. A.; Targulian, V. O.; Solleiro-Rebolledo, E.

    2017-09-01

    The results of a hierarchical morphogenetic, physicochemical, and mineralogical study of the Ryshkovo full-profile texture-differentiated paleosol of the Mikulino Interglacial from the section at Aleksandrov quarry in Kursk oblast are discussed. The correlation analysis of the stratigraphy of this section with global geological records made it possible to determine the position of the Ryshkovo paleosol in the chronostratigraphic system of the Late Pleistocene and to attribute it to stage MIS 5e; the duration of pedogenesis for this paleosol was no more than 12-15 ka. The results of the study indicate that the Ryshkovo paleosol is close in its properties to the Holocene soddy-podzolic soils of the East European Plain. No direct evidences in favor of the former interpretation of this paleosol as a lessivated soil genetically close to Luvisols of nemoral broadleaved forest of Central Europe have been found. The difference between the paleosol of the Mikulino Interglacial and the modern soddy-podzolic soils is mainly related to the distribution of clay coatings. In the upper part of the illuvial horizon of Mikulino paleosol, clay coatings are few in number, and typical tongues of podzolized (albic) material are absent in the profile. At the same time, silty coatings (skeletans) are abundant even in the lower part of the illuvial horizon. In general, the Mikulino paleosol is characterized by a smaller diversity of clay pedofeatures. These differences might be related to less contrasting fluctuations of the environmental conditions in the second half of the Mikulino Interglacial, to the periodical renewal of the eluvial part of Mikulino paleosol by erosional and accumulative processes, and to the absence of anthropogenic impacts on the soil during the Mikulino Interglacial. The burying of the Ryshkovo paleosol took place due to the intense development of erosional processes induced by the contrasting climatic events at the end of the interglacial period accompanied by

  19. ORAL ISSUE OF THE JOURNAL "USPEKHI FIZICHESKIKH NAUK": Special session of the Uspekhi Fizicheskikh Nauk Editorial Board celebrating the 90th anniversary of the journal(19 November 2008)

    NASA Astrophysics Data System (ADS)

    Ginzburg, Vitalii L.; Dremin, Igor M.; Shirkov, Dmitrii V.; Smirnov, Boris M.; Aleksandrov, Evgenii B.; Vershovskii, Anton K.; Maksimov, Evgenii G.; Fortov, Vladimir E.

    2009-06-01

    A special session of the Uspekhi Fizicheskikh Nauk (UFN) Editorial Board (UFN's oral issue) celebrating the 90th anniversary of the journal and the 50th anniversary of its English version (first under the title Soviet Physics-Uspekhi and then under the current title Physics-Uspekhi) took place on November 19, 2008 in the conference hall of the P N Lebedev Physical Institute (FIAN) of the Russian Academy of Sciences. The following reports were presented at the session: (1) Ginzburg V L (P N Lebedev Physical Institute, RAS, Moscow), Aksent'eva M S (Uspekhi Fizicheskikh Nauk, RAS, Moscow) "On the history of UFN (introductory talk)"; (2) Dremin I M (P N Lebedev Physical Institute, RAS, Moscow) "The physics of the Large Hadron Collider"; (3) Shirkov D V (Joint Institute for Nuclear Research, Dubna, Moscow region) "Pair correlations and spontaneous symmetry breaking"; (4) Smirnov B M (Institute for High Temperatures, RAS, Moscow) "Modeling of gas-discharge plasma"; (5) Sadovskii M V (Institute of Electrophysics, RAS Ural Branch, Ekaterinburg) "High-temperature superconductivity in iron-based layered compounds"; (6) Aleksandrov E B (All-Russian Research Center, S I Vavilov State Optical Institute, St. Petersburg) Physical limits in the metrology of a magnetic field by atomic spectroscopy techniques"; (7) Maksimov E G (P N Lebedev Physical Institute, RAS, Moscow) "Microscopic studies of the nature of the ferroelectric transition"; (8) Fortov V E (Institute for High Energy Density, RAS, Moscow) "Extreme states of matter". Articles based on reports 1-4 and 6-8 are published below in this special issue of the Uspekhi Fizicheskikh Nauk journal devoted to the jubilees of the Russian and English versions of the journal.

  20. FROM THE EDITORIAL BOARD: From the Editorial Board

    NASA Astrophysics Data System (ADS)

    2008-12-01

    A special session of the Editorial Board of Physics - Uspekhi (its oral issue) celebrating the 90th anniversary of the journal and the 50th anniversary of its English version took place on November 19, 2008 in the conference hall of the P N Lebedev Physical Institute (FIAN) of the Russian Academy of Sciences. The following reports were presented at the session: (1) Ginzburg V L (P N Lebedev Physical Institute, RAS, Moscow), Aksent'eva M S (Uspekhi Fizicheskikh Nauk, RAS, Moscow) "On the history of UFN (introductory talk)"; (2) Dremin I M (P N Lebedev Physical Institute, RAS, Moscow) "The physics of the Large Hadron Collider"; (3) Shirkov D V (Joint Institute for Nuclear Research, Dubna, Moscow region) "Pair correlations and spontaneous symmetry breaking"; (4) Smirnov B M (Institute for High Temperatures, RAS, Moscow) "Modeling of gas-discharge plasma"; (5) Sadovskii M V (Institute of Electrophysics, RAS Ural Branch, Ekaterinburg) "High-temperature superconductivity in iron-based layered compounds"; (6) Aleksandrov E B (All-Russian Research Center 'S I Vavilov State Optical Institute', St.-Petersburg) "Physical limits in the metrology of a magnetic field by atomic spectroscopy techniques"; (7) Maksimov E G (P N Lebedev Physical Institute, RAS, Moscow) "Microscopic studies of the nature of the ferroelectric transition"; (8) Fortov V E (Institute for High Energy Density, RAS, Moscow) "Extreme states of matter". We plan to publish reports Nos 1 - 4 and 6 - 8 in one of the 2009 issues of Physics - Uspekhi, while report No. 5 is published in the present issue for reasons specified in the Editor-in-Chiefs foreword to this article.

  1. Hepta-, hexa-, penta-, tetra-, and trisaccharide resin glycosides from three species of Ipomoea and their antiproliferative activity on two glioma cell lines.

    PubMed

    León-Rivera, Ismael; Del Río-Portilla, Federico; Enríquez, Raúl G; Rangel-López, Edgar; Villeda, Juana; Rios, María Yolanda; Navarrete-Vázquez, Gabriel; Hurtado-Días, Israel; Guzmán-Valdivieso, Ulises; Núñez-Urquiza, Verónica; Escobedo-Martínez, Carolina

    2017-03-01

    Six new partially acylated resin glycosides were isolated from convolvulin of Ipomoea purga, Ipomoea stans, and Ipomoea murucoides (Convolvulaceae). The structures of compounds 1-6 were elucidated by a combination of NMR spectroscopy and mass spectrometry. The structure of jalapinoside B (1) consists of a hexasaccharide core bonded to an 11-hydroxytetradecanoic (convolvulinic) acid forming a macrolactone acylated by a 2-methylbutanoyl, a 3-hydroxy-2-methylbutanoyl, and a quamoclinic acid B units. Purginoic acid A (2) contains a hexasaccharide core bonded to a convolvulinic acid acylated by a 3-hydroxy-2-methylbutanoyl unit. Stansin A (4) is an ester-type heterodimer, and consists of two stansoic acid A (3) units, acylated by 2-methylbutanoic and 3-hydroxy-2-methylbutanoic acids. The site of lactonization was located at C-3 of Rhamnose, and the position for the ester linkage of the monomeric unit B on the macrolactone unit A was established as C-4 of the terminal rhamnose. Compounds 5 and 6 are glycosidic acids. Murucinic acid II (5) is composed of a pentasaccharide core bonded to an 11-hydroxyhexadecanoic (jalapinolic) acid, acylated by an acetyl unit. Stansinic acid I (6) is a tetrasaccharide core bonded to a jalapinolic acid, acylated by 2-methylbutanoyl and 3-hydroxy-2-methylbutanoyl units. Preliminary testing showed the cytotoxicity of compounds 1-6 toward OVCAR and UISO-SQC-1 cancer cell lines. In addition, compound 1 showed an antiproliferative activity on glioma C6 and RG2 tumor cell lines. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  2. [Genetic structure of the Udmurt population].

    PubMed

    Zinchenko, R A; El'chinova, G I; Petrov, N V; Osipova, E V; Malyshev, P Iu; Poliakov, A V; Ginter, E K

    2007-08-01

    Integrated study of the genetic structure of the Udmurt population with respect to different genetic systems has been performed. Data on the genes of genetic diseases, abiotic parameters analyzed by population statistic methods, and DNA polymorphism are summarized. The populations of six raions (districts) of Udmurt Republic (the Mozhga, Malaya Purga, Sharkan, Debesy, Igra, and Glazov raions) have been studied. The total population studied was 267,655 people (an urban population of 150,119 people and a rural population of 117,536 people), including 155,346 Udmurts. The population structure has been studied in six districts on the basis of the vital statistics, Crow's indices, Malecot's isolation by distance parameters, ethnically assortative marriage parameters, endogamy indices, inbreeding-endogamy (ie) indices, and frequencies of the genotype and allele frequencies of four DNA markers (17 alleles). The prevalences of hereditary diseases have been calculated for different population groups: urban and rural populations, Udmurts and other ethnic groups. These groups, especially the urban and rural populations, substantially differed from one another in the prevalences of autosomal dominant (AR) and autosomal recessive (AR) diseases. The correlation between the prevalence of AD and AR diseases and the ie index is positive and significant. The spectrum of hereditary diseases detected in six districts of Udmurtia comprises 149 diseases (80, 57, and 12 AD, AR, and X-linked diseases, respectively). Accumulation of individual diseases in districts of Udmurtia and accumulation of diseases in Udmurtia as compared to regions studied earlier has been found. Cluster analysis of the frequencies of genes of AD and AR diseases and DNA markers has determined the gene geographic position of Udmurts.

  3. PREFACE: 2nd Russia-Japan-USA Symposium on the Fundamental and Applied Problems of Terahertz Devices and Technologies (RJUS TeraTech - 2013)

    NASA Astrophysics Data System (ADS)

    Karasik, Valeriy; Ryzhii, Viktor; Yurchenko, Stanislav

    2014-03-01

    The 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies' (RJUS TeraTech - 2013) Bauman Moscow State Technical University Moscow, Russia, 3-6 June, 2013 The 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies' (RJUS TeraTech - 2013) was held in Bauman Moscow State Technical University on 3-6 June 2013 and was devoted to modern problems of terahertz optical technologies. RJUS TeraTech 2013 was organized by Bauman Moscow State Technical University in cooperation with Tohoku University (Sendai, Japan) and University of Buffalo (The State University of New York, USA). The Symposium was supported by Bauman Moscow State Technical University (Moscow, Russia) and Russian Foundation for Basic Research (grant number 13-08-06100-g). RJUS TeraTech - 2013 became a foundation for sharing and discussing modern and promising achievements in fundamental and applied problems of terahertz optical technologies, devices based on grapheme and grapheme strictures, condensed matter of different nature. Among participants of RJUS TeraTech - 2013, there were more than 100 researchers and students from different countries. This volume contains proceedings of the 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies'. Valeriy Karasik, Viktor Ryzhii and Stanislav Yurchenko Bauman Moscow State Technical University Symposium chair Anatoliy A Aleksandrov, Rector of BMSTU Symposium co-chair Valeriy E Karasik, Head of the Research and Educational Center 'PHOTONICS AND INFRARED TECHNOLOGY' (Russia) Invited Speakers Taiichi Otsuji, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan Akira Satou, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan Michael Shur, Electrical, Computer and System Engineering and Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, NY, USA Natasha

  4. Atomistic analysis of the vacancy mechanism of impurity diffusion in silicon

    NASA Astrophysics Data System (ADS)

    List, S.; Ryssel, H.

    1998-06-01

    The complete set of the four macroscopic transport coefficients describing the coupled diffusion of impurity atoms and vacancies in silicon is calculated from the atomistic mechanism by accurately taking into account the effects of the microscopic forces between dopants and vacancies. The aim of these simulations is to come to a decision concerning the validity of models like the pair diffusion model [e.g., M. Yoshida, J. Appl. Phys. 48, 2169 (1977); R. B. Fair and J. C. C. Tsai, J. Electrochem. Soc. 124, 1107 (1977); F. F. Morehead and R. F. Lever, Appl. Phys. Lett. 48, 151 (1986); B. J. Mulvaney and W. B. Richardson, Appl. Phys. Lett. 51, 1439 (1987)] or the "non-Fickian diffusion" model [M. Kurata, Y. Morikawa, K. Nagami, and H. Kuroda, Jpn. J. Appl. Phys. 12, 472 (1973); Y. Morikawa, K. Yamamoto, and K. Nagami, Appl. Phys. Lett. 36, 997 (1980); V. V. Kozlovski, V. N. Lomasov, and L. S. Vlasenko, Radiat. Eff. 106, 37 (1988); O. V. Aleksandrov, V. V. Kozlovski, V. V. Popov, and B. E. Samorukov, Phys. Status Solidi 110, K61 (1988), K. Maser, Exp. Tech. Phys. (Berlin) 34, 213 (1986), K. Maser, Ann. Phys. (Leipzig) 45, 81 (1988), K. Maser, Exp. Tech. Phys. (Berlin) 39, 169 (1991)] that make contradicting predictions for very fundamental properties like the relative direction of the fluxes of dopants and vacancies driven by a vacancy gradient and for the relation α=Td0/Dd0 between two of the four transport coefficients. Simulation results are shown for a variety of assumed interaction potentials that establish a functional dependence between α and measurable quantities, like the factor Dd/Dtracer of enhancement of dopant diffusivity over tracer diffusion, that holds for an arbitrary interaction. The comparison with experimental values for Dd/Dtracer leads to confirmation of the pair diffusion model for boron and phosphorous. For arsenic and antimony, the large scatter of the experimental data prohibits an equally definite conclusion, but at least a qualitative

  5. Spin noise spectroscopy from acoustic to GHz frequencies

    NASA Astrophysics Data System (ADS)

    Hübner, Jens

    2010-03-01

    Performing perturbation free measurements on semiconductor quantum systems has long been banished to textbooks on quantum mechanics. The emergent technique of spin noise spectroscopy is challenging this restriction. Empowered only by the ever present intrinsic spin fluctuation dynamics in thermal equilibrium, spin noise spectroscopy is capable to directly deduce several physical properties of carriers spins in semiconductors from these fluctuations. Originating from spin noise measurements on alkali metal vapors in quantum optics [1] the method has become a powerful technique to unravel the intrinsic spin dynamics in semiconductors [2]. In this talk I will present the recent progress of spin noise spectroscopy and how it is used to monitor the spin dynamic in semiconductor quantum wells at thermal equilibrium and as a consequence thereof directly detect the spatial dynamics of the carriers being marked with their own spin on a microscopic scale [3]. Further I will present measurements of how the non-perturbative nature of spin noise spectroscopy gives valuable insight into the delicate dependence of the spin relaxation time of electrons on doping density and temperature in semiconductors n-doped in the vicinity of the metal-insulator transition where hyperfine and intra-band depolarization compete [4]. Also the measurement bandwidth can be extended to GHz frequencies by ultrafast optical probing [5] yielding in conjunction with depth resolved spin noise measurements insights into the origin of inhomogeneous spin dephasing effects at high magnetic fields [5]. Additionally I will present how spin noise spectroscopy can be employed to spatially depth resolve doping profiles with optical resolution [6] and give a summary on easy to implement techniques of spin noise spectroscopy at acoustic frequencies in alkali metal vapors. [4pt] [1] E. Aleksandrov and V. Zapassky, Zh. Eksp. Teor. Fiz. 81, 132 (1981); S. A. Crooker, D. G. Rickel, A. V. Balatsky, and D. L. Smith

  6. From the first nuclear power plant to fourth-generation nuclear power installations [on the 60th anniversary of the World's First nuclear power plant

    NASA Astrophysics Data System (ADS)

    Rachkov, V. I.; Kalyakin, S. G.; Kukharchuk, O. F.; Orlov, Yu. I.; Sorokin, A. P.

    2014-05-01

    Successful commissioning in the 1954 of the World's First nuclear power plant constructed at the Institute for Physics and Power Engineering (IPPE) in Obninsk signaled a turn from military programs to peaceful utilization of atomic energy. Up to the decommissioning of this plant, the AM reactor served as one of the main reactor bases on which neutron-physical investigations and investigations in solid state physics were carried out, fuel rods and electricity generating channels were tested, and isotope products were bred. The plant served as a center for training Soviet and foreign specialists on nuclear power plants, the personnel of the Lenin nuclear-powered icebreaker, and others. The IPPE development history is linked with the names of I.V. Kurchatov, A.I. Leipunskii, D.I. Blokhintsev, A.P. Aleksandrov, and E.P. Slavskii. More than 120 projects of various nuclear power installations were developed under the scientific leadership of the IPPE for submarine, terrestrial, and space applications, including two water-cooled power units at the Beloyarsk NPP in Ural, the Bilibino nuclear cogeneration station in Chukotka, crawler-mounted transportable TES-3 power station, the BN-350 reactor in Kazakhstan, and the BN-600 power unit at the Beloyarsk NPP. Owing to efforts taken on implementing the program for developing fast-neutron reactors, Russia occupied leading positions around the world in this field. All this time, IPPE specialists worked on elaborating the principles of energy supertechnologies of the 21st century. New large experimental installations have been put in operation, including the nuclear-laser setup B, the EGP-15 accelerator, the large physical setup BFS, the high-pressure setup SVD-2; scientific, engineering, and technological schools have been established in the field of high- and intermediate-energy nuclear physics, electrostatic accelerators of multicharge ions, plasma processes in thermionic converters and nuclear-pumped lasers, physics of compact

  7. Diet choice in weight-restored patients with eating disorders; progressive autonomy process by nutritional education.

    PubMed

    Ruiz-Prieto, Inmaculada; Bolaños-Ríos, Patricia; Jáuregui-Lobera, Ignacio

    2013-01-01

    Introducción: El comportamiento alimentario humano está regulado por numerosos factores. Mientras los pacientes con anorexia nerviosa muestran un patrón nutricional restrictivo, los pacientes con bulimia nerviosa presentan episodios de atracón y purgas. Aunque los tratamientos son muy efectivos en la normalización de la composición corporal los comportamientos alimentarios inadecuados tienden a mantenerse constituyendo un factor de riesgo de recaídas y recidivas. Objetivos: El objetivo de este trabajo fue evaluar la calidad de la elección nutricional de pacientes con trastornos de la conducta alimentaria durante un programa de un año de educación nutricional analizando la mejoría en la capacidad de elección. Método: Treinta y un pacientes de una unidad de trastornos alimentarios planificaron un menú tras la normalización de la composición corporal, tarea que repitieron cada tres meses durante el año de intervención. Resultados: Los pacientes mejoraron el tiempo emplea - do en configurar el menú (p < 0,01), el Índice de Masa Corporal (p < 0,01), la masa grasa corporal (p < 0,01), la energía (p < 0,05), los carbohidratos (p < 0,01) y los ácidos grasos poliinsaturados (p < 0,05) de los menús planificados. No hubo diferencias en cuanto al total de grasas, perfil lipídico, vitaminas y minerales. El 12,9% y 3,2% de los pacientes escogieron sus menús de acuerdo a las recomendaciones de perfil calórico y lipídico, respectivamente, tras el año de tratamiento. Discusión: Aunque los pacientes mejoraron el contenido energético y los carbohidratos en los menús elegidos, tendieron a reducir el contenido calórico y las grasas en su elección, lo que puede conducir a una peor evolución. Conclusiones: Durante un año de educación nutricional, junto con el correspondiente tratamiento psicológico y psiquiátrico, se observó una mejoría en los factores dietéticos habitualmente implicados en una posible mala evolución.