title: Pronounced species divergence in corticospinal tract reorganization and functional recovery after lateralized spinal cord injury favors primates

dc.contributor.author

value: Friedli, Lucia

value: Rosenzweig, Ephron S

value: Barraud, Quentin

value: Schubert, Martin

value: Dominici, Nadia

value: Awai, Lea

value: Nielson, Jessica L

value: Musienko, Pavel

value: Nout-Lomas, Yvette

value: Zhong, Hui

value: Zdunowski, Sharon

value: Roy, Roland R

value: Strand, Sarah C

value: van den Brand, Rubia

value: Havton, Leif A

value: Beattie, Michael S

value: Bresnahan, Jacqueline C

value: Bézard, Erwan

value: Bloch, Jocelyne

value: Edgerton, V Reggie

value: Ferguson, Adam R

value: Curt, Armin

value: Tuszynski, Mark H

value: Courtine, Grégoire

dc.description.abstract

value: Experimental and clinical studies suggest that primate species exhibit greater recovery after lateralized compared to symmetrical spinal cord injuries. Although this observation has major implications for designing clinical trials and translational therapies, advantages in recovery of nonhuman primates over other species have not been shown statistically to date, nor have the associated repair mechanisms been identified. We monitored recovery in more than 400 quadriplegic patients and found that functional gains increased with the laterality of spinal cord damage. Electrophysiological analyses suggested that corticospinal tract reorganization contributes to the greater recovery after lateralized compared with symmetrical injuries. To investigate underlying mechanisms, we modeled lateralized injuries in rats and monkeys using a lateral hemisection, and compared anatomical and functional outcomes with patients who suffered similar lesions. Standardized assessments revealed that monkeys and humans showed greater recovery of locomotion and hand function than did rats. Recovery correlated with the formation of corticospinal detour circuits below the injury, which were extensive in monkeys but nearly absent in rats. Our results uncover pronounced interspecies differences in the nature and extent of spinal cord repair mechanisms, likely resulting from fundamental differences in the anatomical and functional characteristics of the motor systems in primates versus rodents. Although rodents remain essential for advancing regenerative therapies, the unique response of the primate corticospinal tract after injury reemphasizes the importance of primate models for designing clinically relevant treatments.

dc.language.iso

value: en

dc.title

filename: Sci Tr med 2015.docx


title: Ethanol purification from methanol via pervaporation using polybеnzoхazinonеimidе membrane☆

dc.contributor.author

value: Pulyalina, Alexandra Yu.

value: Polotskaya, Galina A.

value: Veremeychik, Кseniya Yu.

value: Goikhman, Mikhail Ya.

value: Podeshvo, Irina V.

value: Toikka, Alexander M.

dc.description.abstract

value:
Polybenzoxazinoneimide membrane was prepared in three steps: a dichlorodianhydride (obtained by the reaction of trimellitic anhydride with 4,4′-oxydianiline) was treated with methylene-bis(anthranilic acid). The
resulting polyamic acid was dissolved in N-methylpyrrolidone, the solution was cast as a thin film, the solvent
was evaporated and the membrane was heated under controlled conditions to convert polyamic acid into
polybenzoxazinoneimide. Density, free volume parameters, sorption parameters for methanol and ethanol of
the membrane were determined. The membrane was used for the pervaporation of methanol/ethanol mixtures containing 5–20wt.%methanol which aremixturesmodeling bioalcohol. Themembrane was preferentially permeated by methanol with high separation factors.

dc.publisher

value: Elsevier

dc.type

value: Article

format: Adobe PDF


title: Discovery of Novel Isatin-Based p53 Inducers

dc.contributor.author

value: Davidovich, P

value: Aksenova, V

value: Petrova, V

value: Tentler, D

value: Orlova, D

value: Smirnov, S

value: Gurzhiy, Vladislav V.

value: Okorokov, A L

value: Garabadzhiu, A

value: Melino, G

value: Barlev, N

value: Tribulovich, V

dc.description.abstract

value: A series of isatin Schiff base derivatives were identified during in silico screening of the small molecule library for novel activators of p53. The compounds selected based on molecular docking results were further validated by a high-content screening assay using U2OS human osteosarcoma cells with an integrated EGFP-expressing p53-dependent reporter. The hit compounds activated and stabilized p53, as shown by Western blotting, at higher rates than the well-known positive control Nutlin-3. Thus, the p53-activating compounds identified by this approach represent useful molecular probes for various cancer studies.

dc.publisher

value: American Chemichal Society

dc.relation.ispartofseries

value: ACS Medicinal Chemistry Letters;V. 6. Issue 8

dc.title

filename: 2015_Davidovich_Med Chem.pdf


dc.contributor.author

value: Shahinyan, Arsen K.

dc.identifier.citation

value: Armenija, Azerbajdžan i Južnyj Kavkaz v Novoe vremja: Učebnik dlja vuzov [Armenia, Azerbaijan and Southern Caucasus in the Modern times: University textbook]. - Saint-Petersburg: Faculty of Philology, Saint-Petersburg State University, 2015. - 160 p.

dc.description.abstract

value: В учебнике доктора исторических наук, профессора кафедры истории народов стран СНГ Института истории СПбГУ комплексно излагается всесторонняя история стран Армянского нагорья, Южного Кавказа и Иранского Азербайджана в Новое время (с XVI в. 1917 г.). Учебник предназначен для студентов профиля "Всеобщая история" Института истории СПбГУ, а также для студентов и аспирантов-восточников СПбГУ и МГУ, изучающих новую историю стран Передней Азии в целом

dc.description.sponsorship

value: The authors acknowledge Saint-Petersburg State University for a research grant 5.38.283.2014

dc.language.iso

value: ru

dc.subject

value: Modern history of Armenia

value: Modern history of Iranian Azerbaijan

value: Modern history of Southern Caucasus

value: Modern history of Anterior Asia

dc.title.alternative

value: АРМЕНИЯ, АЗЕРБАЙДЖАН И ЮЖНЫЙ КАВКАЗ В НОВОЕ ВРЕМЯ

dc.type

value: Book

dc.contributor.altauthor

value: Шагинян, Арсен Карапети

filename: Шагинян 60x90x16_мягкая_Нестор_145х205.pdf

description: Book cover


title: Simulation of multiple scattering in the systems with complicated phase function

dc.contributor.author

value: Aksenova, E.V.

value: Kokorin, D.I.

value: Romanov, V.P.

dc.description.abstract

value: We consider simulation of multiple scattering of waves in isotropic and anisotropic media. The focus is on the construction of the phase function interpolation for the single scattering. The procedure is based on the construction of the adaptive partitioning of the angular variables that determine the phase function. The developed interpolation method allows us rather quickly to perform calculations for systems with very complicated phase function. Application of the proposed method is illustrated by calculating the multiple scattering of light in a nematic liquid crystal (NLC) which presents the uniaxial anisotropic system. For this system the grid corresponding to the adaptive partitioning is constructed and the transition to the diffusion regime for the photon distribution is presented.

dc.language.iso

value: en

dc.publisher

value: Elsevier B.V.

dc.subject

value: Multiple scattering

value: Diffusion of light

value: Uniaxial systems

dc.type

value: Article


title: Calcinaksite, KNaCa(Si4O10) H2O, a new mineral from the Eifel volcanic area, Germany

dc.contributor.author

value: Chukanov, N.V.

value: Aksenov, S.M.

value: Rastsvetaeva, R.K.

value: Blass, G.

value: Varlamov, D.A.

value: Pekov, I.V.

value: Belakovskiy, D.I.

value: Gurzhiy, Vladislav V.

dc.description.abstract

value: The new mineral calcinaksite, ideally KNaCa(Si4O10) · H2O, the first hydrous and Ca-dominant member of the litidionite group, is found in a xenolith of metamorphosed carbonate-rich rock from the southern lava flow of the Bellerberg volcano, Eastern Eifel region, Rheinland-Pfalz, Germany. It is associated with wollastonite, gehlenite, brownmillerite, Ca2SiO4 (larnite or calcio-olivine), quartz, aragonite, calcite, jennite, tobermorite and ettringite. Calcinaksite occurs as clusters of colourless to light-grey subhedral prismatic crystals. The mineral is brittle, with Mohs’ hardness of 5; Dmeas is 2.62(2) g/cm3 and Dcalc is 2.623 g/cm3. The IR spectrum shows the presence of H2O molecules forming three different H-bonds. Calcinaksite is optically biaxial (+), α = 1.542(2), β = 1.550(2), γ = 1.565(3), 2V meas = 75(10). The chemical composition (electron-microprobe data, H2O determined by the Alimarin method, wt%) is: Na2O 6.69, K2O 12.01, CaO 15.04, FeO 0.59, SiO2 61.46, H2O 4.9, total 100.69. The empirical formula is H2.11 K0.99Na0.84Ca1.04Fe0.03Si3.98O11. The crystal structure was solved and refined to R 1 = 0.053, wR 2 = 0.075 based upon 3057 reflections having I > 3σ(I). Calcinaksite is triclinic, space group P 1¯¯¯ , a = 7.021(2), b = 8.250(3), c = 10.145(2) Å. α = 102.23(2)°, β = 100.34(2)°, γ = 115.09(3)°, V = 495.4(3) Å3, Z = 2. The strongest reflections of the X-ray powder pattern [d, Å (I,%) (hkl)] are: 3.431 (70) (−121, −211, −210, 012, 0–22), 3.300 (67) (−031), 3.173 (95) (−103, −201, −220, 003, 111), 3.060 (100) (−212, 2–11, −221, 200, −1-13, 021, −202), 2.851 (83) (0–23, −122, 1–13, 1–31), 2.664 (62) (1–23, −222, 201).

dc.publisher

value: Springer

dc.relation.ispartofseries

value: Mineralogy and Petrology;V. 109. Issue 4


title: Molecular and crystal structures of 2-phenyl-2-hydro-6-methyl-1,3-dioxa-6-aza-2-silacyclooctane

dc.contributor.author

value: Ignatyev, I.S.

value: Kochina, T.A.

value: Avronin, V.V.

value: Fundamensky, V.S.

dc.description.abstract

value: The crystal structure of 2-phenyl-2-hydro-6-methyl-1,3-dioxa-6-aza-2-silacyclooctane [HPhSi(OCH2CH2)2NMe – phenylhydrosilocane (I)] is determined by single-crystal X-ray diffraction at 100 K. The unit cell consists of four molecules connected only by Van-der-Waals interactions. Each molecule has an eight-membered heterocycle with a phenyl group in the axial position. The Si⋯N transannular bond has a short (2.206 Å) interatomic distance which exceeds only this distance in ocanes with highly electronegative fluorine substituents at Si. Since there exist experimental data on the occurrence of different conformers of I in the liquid phase, the PES of the molecule was analyzed by DFT B3LYP and MP2 methods with the aug-cc-pVDZ basis set. The energy minimum belongs to the boat–chair conformation with the axial position of the phenyl group. Rotation of the phenyl ring around the SiC bond has a barrier ca. 1 kcal/mol. The conformer with the equatorial position of this group lies 6 kcal/mol higher. Interconversion of this conformers which was observed in experiment proceeds through the chair–chair configuration in which the Si⋯N transannular bond is absent and coordination at silicon is tetrahedral, rather than trigonal bipyramidal one observed in other conformers.

dc.language.iso

value: en

dc.publisher

value: Elsevier

dc.relation.ispartofseries

value: Journal of Molecular Structure;V. 1094

dc.subject

value: Pentacoordinate silicon

value: Silocanes

value: Quasisilatranes

value: DFT

value: Conformers

value: X-ray diffraction

dc.title

filename: 2015_VSF_J MolecStr.pdf


title: Хозяйственная самостоятельность промышленных предприятий в условиях внутрифирменного расчета структурных звеньев энергетической монополии

dc.contributor.author

value: Величко, Елена Александровна

dc.description.abstract

value: Работа посвящена разработке и внедрению системы внутрифирменного расчета промышленных предприятий энергетической монополии в качестве стратегии роста производительности труда персонала и экономии всех видов ресурсов. В работе обосновывается функциональная модель внутрифирменного расчета предприятий, рассчитывается потенциальный экономический эффект от реализации новой модели экономических отношений, разрабатывается системный подход к формированию таких основообразующих элементов данной модели как премиальные показатели, основанные на оценке эффективности производственной деятельности, методика обоснования и корректировки внутренних цен на продукцию, формирование и распределение фондов экономического стимулирования в условиях энергетической монополии.

dc.language.iso

value: ru

dc.publisher

value: ВИНИТИ РАН

dc.subject

value: Внутрифирменный расчет

value: Экономическая эффективность

dc.type

value: Book

filename: Аннотации.docx

format: Microsoft Word XML


title: Ключевые показатели эффективности труда и концепция построения премиальных систем сотрудников проектных команд

dc.contributor.author

value: Величко, Елена Александровна

value: Давыдовский, Федор Николаевич

dc.description.abstract

value:
В  статье  обосновывается  необходимость  разработки  системы премирования  и  материального  стимулирования участников  проектных команд  на  основе  оценки  результатов  труда  по  ключевым  показателям  эффективности.
Рассмотренная в статье концепция построения премиальных систем, основанная на использовании фонда материального вознаграждения
участников  проектных  команд,  позволяет  обеспечить объективность,
четкость  и  эффективность  мотивации  сотрудников,  установить  четкую
зависимость оплаты труда от достигнутых ими результатов. Авторская
концепция  построения  премиальных  систем  направлена  на  создание
эффективного  мотивационного  механизма сотрудников  предприятий,
организованных по проектному типу. Результаты изложенной концепции были
апробированы авторами на практике, ряд ее положений были доведены до
уровня конкретных методических рекомендаций и алгоритмов.

dc.publisher

value: ФБГОУ ВО «Мордовский государственный университет им. Н.П. Огарева»

dc.subject

value: материальное  вознаграждение

value: оценка   результативности  сотрудника

dc.title

value: Article


title: The crystal structure of girvasite, NaCa2Mg3(PO4)3(CO3)(H2O)6, a complex phosphate carbonate hydrate based upon electroneutral heteropolyhedral layers

dc.contributor.author

value: Krivovichev, S.V.

value: Britvin, S.N.

value: Chernyatieva, A.P.

value: Yakovenchuk, V.N.

dc.identifier.citation

value: Russian Geology and Geophysics, Volume 56, Issues 1–2, January–February 2015, Pages 155–163

dc.description

value: Crystal chemical formula of girvasite. As it was mentioned above, the initial formula of girvasite proposed by Sokolova and Yegorov-Tismenko (1990) on the basis of crystal-structure determination is NaCa2Mg3(OH)2H2(PO4)3(CO3)(H2O)4. However, determination of all H sites in this work revealed no hydroxyl groups or protonated PO43- anions. Instead, all O atoms not bonded to P5+ or C4+ cations form two strong hydrogen bonds each, thus belonging to H2O groups. This observation allows us to revise the crystal chemical formula of girvasite as NaCa2Mg3(PO4)3(CO3)(H2O)6. This formula excludes simultaneous occurrence of the basic (OH)- and acid (PO3OH)2- anions originally postulated for girvasite by Sokolova and Yegorov-Tismenko (1990).

dc.description.abstract

value: The crystal structure of girvasite, NaCa2Mg3(PO4)3(CO3)(H2O)6, has been refined using X-ray diffraction data collected at 173 K, which allowed to revise its crystal chemical formula. The mineral is monoclinic, P21/c, a = 6.4784(2), b = 12.2313(3), с = 21.3494(6) Å, β = 89.624(2), V = 1691.67(8) Å3 (at 173 K), Z = 4, R1 = 0.037 for 6471 unique observed reflections. The crystal structure of girvasite contains three Mg, two Ca and one Na sites. The Mg atoms are octahedrally coordinated by O atoms and H2O molecules. The Ca sites are coordinated by eight anions each, whereas the Na site has a coordination number equal to seven. The crystal structure is based upon heteropolyhedral sheets formed by polymerization of Mg octahedra, PO4 tetrahedra and CO3 groups. The sheets consist of fundamental building units (FBBs) formed by two Mg octahedra that share edges to form dimers decorated by three PO4 tetrahedra and linked to a unit consisting of a MgO6 octahedron sharing an edge with a carbonate triangle. The FBBs polymerize to form chains running parallel to the a axis. The chains are further polymerized to compose heteropolyhedral sheets stuffed by the Ca2+ and Na+ cations, and H2O groups to form electroneutral layers parallel to (001). The adjacent layers connect to each other via a complex system of hydrogen bonds. The interesting feature of the structure is a bidentate coordination of Mg2 atom by a CO3 group. The O14-Mg2-O16 angle is shortened from 90o (expected for a regular octahedron) to 60.46o, whereas the O14-C-O16 angle is shortened from 120o to 115.92o. Girvasite is the most structurally complex mineral among natural phosphate carbonates known to date. Its high structural complexity reflects its chemical complexity and high hydration state, which are the result of the specific geochemical and thermodynamic conditions of its formation (low-temperature and low-pressure interactions of phosphate-bearing solutions with primary dolomite carbonatites).

dc.description.sponsorship

value: The Russian Foundation for Basic Research (grant # 14-05-00910) and internal grant of St. Petersburg State University (# 3.38.136.2014). X-ray diffraction measurements have been performed at the SPbSU X-ray Diffraction Resource Centre.

dc.publisher

value: Russian Geology and Geophysics

dc.subject

value: crystal structure, phosphate-carbonate, complexation, structural complexity, Kola peninsula


title: Mechanism of Formation of Copper(II) Chloro Complexes Revealed by Transient Absorption Spectroscopy and DFT/TDDFT Calculations

dc.contributor.author

value: Mereshchenko, Andrey S

value: Olshin, Pavel K

value: Karabaeva, Kanykey E

value: Panov, Maxim S

value: Wilson, R Marshall

value: Kochemirovsky, Vladimir A

value: Skripkin, Mikhail Yu

value: Tveryanovich, Yury S

value: Tarnovsky, Alexander N

dc.description.abstract

value: Copper(II) complexes are extremely labile with typical ligand exchange rate constants on the order of 10(6)-10(9) M(-1) s(-1). As a result, it is often difficult to identify the actual formation mechanism of these complexes. In this work, using UV-vis transient absorption when probing in a broad time range (20 ps to 8 μs) in conjunction with DFT/TDDFT calculations, we studied the dynamics and underlying reaction mechanisms of the formation of extremely labile copper(II) CuCl4(2-) chloro complexes from copper(II) CuCl3(-) trichloro complexes and chloride ions. These two species, produced via photochemical dissociation of CuCl4(2-) upon 420 nm excitation into the ligand-to-metal-charge-transfer electronic state, are found to recombine into parent complexes with bimolecular rate constants of (9.0 ± 0.1) × 10(7) and (5.3 ± 0.4) × 10(8) M(-1) s(-1) in acetonitrile and dichloromethane, respectively. In dichloromethane, recombination occurs via a simple one-step addition. In acetonitrile, where [CuCl3](-) reacts with the solvent to form a [CuCl3CH3CN](-) complex in less than 20 ps, recombination takes place via ligand exchange described by the associative interchange mechanism that involves a [CuCl4CH3CN](2-) intermediate. In both solvents, the recombination reaction is potential energy controlled.

dc.language.iso

value: en

dc.title

filename: JPCB2015_Mechanism of Formation of Copper(II) Chloro Complexes Revealed.pdf


title: Fermi resonances in the vibrational spectrum of perfluoroethane

dc.contributor.author

value: Golubkova, Olga S.

value: Shchepkin, Dmitriy N.

value: Bertsev, Vladimir V.

value: Sergeev, Pavel K.

dc.description.abstract

value: In this paper the Raman spectrum of liquid C2F6 in the spectral region 250–1500 cm−1 is presented. Data on six fundamental Raman bands of C2F6 are obtained. Doublets are observed in the spectral regions of the ν1 (A1g) (1416.3 cm−1, 1425.0 cm−1) and ν7 (Eg) (1221.9 cm−1, 1239.7 cm−1) fundamental bands. The structure of these bands is explained in terms of the Fermi resonances of ν7 ∼ (2ν8) ∼ (ν6 + ν11) (Eg) and ν1 ∼ (2ν6) (A1g) states. The values of the cubic potential energy constant K166 = 7.7 (2) cm−1 and the effective matrix element of a threefold interaction Weff  = 8.5 (5) cm−1 were derived from the simultaneous processing of the doublet parameters in the Raman spectrum of liquid C2F6 and in the IR spectrum of C2F6 in liquid N2.

dc.description.sponsorship

value: This work was supported by the Russian Foundation for Basic Research, projects № 14-03-00716 and № 12-03-31113 mol_a. The spectroscopic measurements were partly performed on the apparatus of the Resource Center Geomodel of Saint-Petersburg State University.

dc.publisher

value: Elsevier

dc.type

value: Article


title: 4-Halo-2-azabuta-1,3-dienes as intermediates in the rhodium carbenoid-initiated transformation of 2-halo-2H-azirines into 2,3-dihydroazetes and 2,5-dihydrooxazoles

dc.contributor.author

value: Smetanin, Ilia A.

value: Novikov, Mikhail S.

value: Rostovskii, Nikolai V.

value: Khlebnikov, Alexander F.

value: Starova, Galina L.

value: Yufit, Dmitry S.

dc.description.abstract

value:
A wide range of electron-poor 4-bromo-/4-chloro-2-azabuta-1,3-dienes were synthesized by the
Rh2(OAc)4-catalyzed reaction of diazo esters and diazo ketones with methyl 2-halo-2H-azirine-2-
carboxylates. The E stereoselectivity with respect to the configuration of the C]C bond of the 2-
azadiene moiety is in good agreement with the results of DFT (M06-2X/6-31þG(d,p)) calculations of
the reaction pathway. The reaction proceeds via the formation of an azirinium ylide intermediate followed
by ring opening with outward rotation of the halogen atom. Depending on the substitution pattern at C1 electron-poor 4-halo-2-azabutadienes can undergo two types of cyclization at elevated temperatures: reversible 1,4-electrocyclization to give 2,3-dihydroazetes or 1,5-exo-trig cyclization to give 5-methylene-2,5-dihydrooxazoles, both in good yields. The dihydrooxazole derivatives can be also obtained at ambient temperature under DBU catalysis.

dc.relation.ispartofseries

value: Tetrahedron;Vol. 71

dc.subject

value: Azirines

value: Diazo compounds

value: Heterocyclizations

dc.title

filename: grafical abstract3.png

format: image/png


title: HERAFitter

dc.contributor.author

value: Alekhin, S

value: Behnke, O

value: Belov, P

value: Borroni, S

value: Botje, M

value: Britzger, D

value: Camarda, S

value: Cooper-Sarkar, A M

value: Daum, K

value: Diaconu, C

value: Feltesse, J

value: Gizhko, A

value: Glazov, A

value: Guffanti, A

value: Guzzi, M

value: Hautmann, F

value: Jung, A

value: Jung, H

value: Kolesnikov, V

value: Kowalski, H

value: Kuprash, O

value: Kusina, A

value: Levonian, S

value: Lipka, K

value: Lobodzinski, B

value: Lohwasser, K

value: Luszczak, A

value: Malaescu, B

value: McNulty, R

value: Myronenko, V

value: Naumann-Emme, S

value: Nowak, K

value: Olness, F

value: Perez, E

value: Pirumov, H

value: Plačakytė, R

value: Rabbertz, K

value: Radescu, V

value: Sadykov, R

value: Salam, G P

value: Sapronov, A

value: Schöning, A

value: Schörner-Sadenius, T

value: Shushkevich, S

value: Slominski, W

value: Spiesberger, H

value: Starovoitov, P

value: Sutton, M

value: Tomaszewska, J

value: Turkot, O

value: Vargas, A

value: Watt, G

value: Wichmann, K

dc.description.abstract

value: HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton–proton deep inelastic scattering and proton–proton (proton–antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help to visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study the impact of new precise measurements from hadron colliders. This paper describes the general structure of HERAFitter and its wide choice of options.

dc.language.iso

value: en

dc.publisher

value: Springer Berlin Heidelberg

value: HERAFitter

dc.title.alternative

value: Open source QCD fit project


title: Nanostructured Yttrium Stabilized Zirconia Coatings on HPT Titanium- Nanostructure  and Phase Composition Analysis

dc.contributor.author

value: Konakov, V.G.

value: Ovid'ko, I.A.

value: Kurapova, O.Yu.

value: Novik, N.N

value: Archakov, I.Yu.

dc.description.abstract

value:
Yttrium stabilized zirconia coatings were deposited on titanium (hardened by high
pressure torsion) by magnetron sputtering. The produced coating was compared with that deposited
on polished Mo wafer. The results of XRD, X-ray fluorescence probe, and electron microscopy
analysis provides an opportunity to study the phase composition and the structure of
both coatings. The effect of wafer pretreatment on coating quality and microstructure is discussed,
and the procedure of HPT titanium pre-treatment for magnetron sputtering is suggested.

dc.description.sponsorship

value:
This work was supported by the Russian Science
Foundation (Grant 14-29-00199).

dc.publisher

value: "Advanced Study Center" Co. Ltd., (St. Petersburg, Russia)

dc.type

value: Article


title: Structure and synthesis of 3,5-dimethyl-N-nitro-1H-pyrazole-1-carboxamidine

dc.contributor.author

value: Ozerova, O.Yu.

value: Efimova, T.P.

value: Novikova, T.A.

value: Gurzhiy, Vladislav V.

value: Berestovitskaya, V.M.

dc.description.abstract

value: A new approach to the synthesis of 3,5-dimethyl-N-nitro-1H-pyrazole-1-carboxamidine was developed based on condensing 1-amino-2-nitroguanidine with pentane-2,4-dione under alkaline catalysis. The known method of its preparation in the presence of acetic acid was improved. The structure of 3,5-dimethyl-N-nitro-1H-pyrazole-1-carboxamidine was characterized by NMR, IR spectroscopy and X-ray diffraction analysis.

dc.publisher

value: Springer

dc.relation.ispartofseries

value: Russian Journal of General Chemistry;V. 85. Issue 7


title: Epitaxial B-Graphene: Large-Scale Growth and Atomic Structure

dc.contributor.author

value: Usachov, Dmitry Yu.

value: Fedorov, Alexander V.

value: Petukhov, Anatoly E.

value: Vilkov, Oleg Yu.

value: Rybkin, Artem G.

value: Otrokov, Mikhail M.

value: Arnau, Andrés

value: Chulkov, Evgueni V.

value: Yashina, Lada V.

value: Farjam, Mani

value: Adamchuk, Vera K.

value: Senkovskiy, Boris V.

value: Laubschat, Clemens

value: Vyalikh, Denis V.

dc.description.abstract

value: Embedding foreign atoms or molecules in graphene has become the key approach in its functionalization and is intensively used for tuning its structural and electronic properties. Here, we present an efficient method based on chemical vapor deposition for large scale growth of boron-doped graphene (B-graphene) on Ni(111) and Co(0001) substrates using carborane molecules as the precursor. It is shown that up to 19 at.% of boron can be embedded in the graphene matrix and that a planar C-B sp2 network is formed. It is resistant to air exposure and widely retains the electronic structure of graphene on metals. The large-scale and local structure of this material has been explored depending on boron content and substrate. By resolving individual impurities with scanning tunneling microscopy we have demonstrated the possibility for preferential substitution of carbon with boron in one of the graphene sublattices (unbalanced sublattice doping) at low doping level on the Ni(111) substrate. At high boron content the honeycomb lattice of B-graphene is strongly distorted and, therefore, it demonstrates no unballanced sublattice doping.

dc.language.iso

value: en

dc.subject

value: graphene, boron, doping, electronic structure, photoemission spectroscopy, tunneling microscopy

dc.title

description: Article


title: Detection of eddy current in the striation

dc.contributor.author

value: Karasev, Viktor Yurievich

value: Dzlieva, Elena Soslanovna

value: Pavlov, Sergey Ivanovich

dc.description.abstract

value:
The dynamics of the dust structures created in striations in the glow discharge in
a magnetic field has a complex character which is shown in the inversion of the direction of the
movement. The hypothesis of existence of eddy current in the striation which in the magnetic
field causes the rotation of dust structures by means of the Amp` ere force has been offered and
developed in the recent works of Nedospasov et al. and Dyachkov et al. In the present work, the
experiment in which eddy current in various phases of striations is registered by means of probing
dust particles is carried out. It is shown that for various discharge conditions and various magnetic
fields the dragging by the rotating gas and the ion drag are the dominating forces defining the
dynamics of dust structures in striations.

dc.publisher

value: A LETTERS JOURNAL EXPLORING THE FRONTIERS  OF PHYSICS

dc.subject

value: Dusty or complex plasmas

value: plasma crystals

dc.type

value: Article


title: Passive advection of a vector field: Anisotropy, finite correlation  time, exact solution and logarithmic corrections to ordinary scaling

dc.contributor.author

value: N. V. Antonov

value: N. M. Gulitskiy

dc.description.abstract

value:
In this work we study the generalization of the problem, considered in [{\it
Phys. Rev. E} {\bf 91}, 013002 (2015)], to the case of {\it finite} correlation
time of the environment (velocity) field. The model describes a vector (e.g.,
magnetic) field, passively advected by a strongly anisotropic turbulent flow.
Inertial-range asymptotic behavior is studied by means of the field theoretic
renormalization group and the operator product expansion. The advecting
velocity field is Gaussian, with finite correlation time and preassigned pair
correlation function. Due to the presence of distinguished direction ${\bf n}$,
all the multiloop diagrams in this model are vanish, so that the results
obtained are exact. The inertial-range behavior of the model is described by
two regimes (the limits of vanishing or infinite correlation time) that
correspond to the two nontrivial fixed points of the RG equations. Their
stability depends on the relation between the exponents in the energy spectrum
${\cal E} \propto k_{\bot}^{1-\xi}$ and the dispersion law $\omega \propto
k_{\bot}^{2-\eta}$. In contrast to the well known isotropic Kraichnan's model,
where various correlation functions exhibit anomalous scaling behavior with
infinite sets of anomalous exponents, here the corrections to ordinary scaling
are polynomials of logarithms of the integral turbulence scale $L$.

dc.description.sponsorship

value:
The work was supported by the Saint Petersburg State University
within the research grant 11.38.185.2014. N.M.G. was also
supported by the Dmitry Zimin’s “Dynasty” foundation and by
the Saint Petersburg Committee of Science and High School.

dc.publisher

value: American Physical Society

dc.subject

value: Physics - Statistical Mechanics

value: Nonlinear Sciences - Chaotic Dynamics


dc.contributor.author

value: Baranov, Anton

value: Dumont, Andre

value: Hartmann, Andreas

value: Kellay, Karim

dc.identifier.citation

value: A. Baranov, A. Dumont, A. Hartmann, K. Kellay, Sampling, interpolation and Riesz bases in the small Fock spaces,  Journal de Mathematiques Pures et Appliquees,  103 (2015), 6, 1358-1389

dc.description.abstract

value: We give a complete description of Riesz bases and characterize interpolation and sampling in terms of densities.

dc.language.iso

value: en

dc.publisher

value: Elsevier

dc.subject

value: Sampling, interpolation, Riesz bases, small Fock spaces


title: Oxocentered Cu(II) lead selenite honeycomb lattices hosting Cu(I)Cl2 groups obtained by chemical vapor transport reactions

dc.contributor.author

value: Kovrugin, Vadim M

value: Colmont, Marie

value: Siidra, Oleg I

value: Mentré, Olivier

value: Al-Shuray, Alexander

value: Gurzhiy, Vladislav V

value: Krivovichev, Sergey V

dc.description.abstract

value: Chemical vapor transport (CVT) reactions were used to prepare three modular mixed-valent Cu(I)-Cu(II) compounds, (Pb2Cu(2+)9O4)(SeO3)4(Cu(+)Cl(2))Cl5 (1), (PbCu(2+)5O2)(SeO3)2(Cu(+)Cl2)Cl3 (2), and (Pb(x)Cu(2+)(6-x)O2)(SeO3)2(Cu(+)Cl2)K(1-x)Cl(4-x) (x = 0.20) (3). In their crystal structures chains of anion-centered (OCu(2+)4) and (OCu(2+)3Pb) tetrahedra form honeycomb-like double layers with cavities occupied by linear [Cu(+)Cl2](-) groups.

dc.publisher

value: Royal Society of Chemistry

dc.relation.ispartofseries

value: Chemical Communications;V. 51. Issue 46

dc.title

value: Article

filename: 2015_Kovrugin_Chem Comm.pdf


title: Статистический анализ эффективности контекстной рекламы

dc.contributor.author

value: Smirnov Dmitriy

dc.language.iso

value: ru

dc.subject

value: контекстная реклама, критерий согласия, критерий однородности, задача о многоруком бандите


title: A Novel Approach to Robust Stability Analysis of Linear Time-Delay Systems

dc.contributor.author

value: Medvedeva, Irina V.

value: Zhabko, Alexey P.

dc.description.abstract

value:
In this paper, we demonstrate that the Lyapunov{Krasovskii functional, which does
not admit a quadratic lower bound, can be applied for the robust exponential stability analysis
as well as for obtaining the exponential estimates for the solutions of linear time-invariant
di erential-di erence systems with multiple delays.

dc.language.iso

value: en

value: time-delay systems

value: Lyapunov-Krasovskii functionals

value: exponential stability

value: robust stability

value: exponential estimates

value: decay rate

dc.title

filename: 2015 TDS Medvedeva final.pdf


title: Nefinitnye formy soslagatelnogo naklonenija v russkom jazyke

dc.contributor.author

value: Say, Sergey

dc.identifier.citation

value: ACTA LINGUISTICA PETROPOLITANA

dc.description.abstract

value:
This paper seeks to determine whether and to what extent combinations
of the subjunctive particle by and non-finite forms (infinitives, participles and
converbs) are part of the paradigm of the Russian verb. This problem is explored
based on 1) the degree of regularity of the semantic oppositions that are created
by these combinations and 2) the degree of obligatoriness of these putative
analytic forms for various types of contexts. Infinitive + by combinations often
behave as full-fledged non-finite subjunctive forms; especially when they
are found in dependent clauses where their use is parallel to the use of finite
subjunctive forms and by is often obligatory. Participle + by combinations are
more marginal; however, there is a type of context where the presence / absence
of by marks a regular and obligatory mood distinction. Russian converbs do
not participate in mood opposition (by is used with converbs very infrequently
and it is always optional). The relevance of mood yields a hierarchy of Russian
non-finite forms: infinitive ≻ participles ≻ converbs. This hierarchy correlates
with the ability of the forms in question to function as independent clauses’
heads.

dc.publisher

value: ILI RAN

dc.subject

value: Russian, subjunctive mood, infinitive, finiteness, paradigm

dc.title.alternative

value: НЕФИНИТНЫЕ ФОРМЫ СОСЛАГАТЕЛЬНОГО НАКЛОНЕНИЯ В РУССКОМ ЯЗЫКЕ


title: Русская Православная Церковь и армия в ХХ – ХХI веках

dc.contributor.author

value: Petrov, IV

dc.description.abstract

value:
В учебно-методическом пособии рассматриваются вопросы развития отношений между Православной Церковью и армией в период двадцатого столетия, начиная с правления императора Николая II и времени, предшествующего Первой мировой войне, вплоть до проблем роли и места военного духовенства в современной России. Помимо Первой мировой и Великой Отечественной войн, особо рассматривается и время Гражданской войны в России, когда русское православное духовенство стояло перед выбором, какую из сторон братоубийственного конфликта следует поддержать Церкви.
Представленные в пособии сведения помогут студентам составить свое собственное суждение о роли Русской Православной Церкви в армии и военных и социальных конфликтах ХХ-ХХI веков.
Предлагаемый список литературы поможет при подготовке к зачетам и экзаменам, промежуточной аттестации, написании рефератов.
Учебно-методическое пособие предназначено для бакалавров и магистров, обучающихся по направлению «История» в Институте Истории Санкт-Петербургского государственного университета.

dc.language.iso

value: ru

dc.type

value: Learning Object

filename: методичкапетров рачковский-2.pdf


title: Gluon emission in interaction of two reggeons

dc.contributor.author

value: Braun, M. A.

value: Pozdnyakov, S. S.

value: Salykin, M. Yu.

value: Vyazovsky, M. I.

dc.description.abstract

value: The vertex is constructed for gluon production in the interaction of two reggeons coupled to projectiles and two reggeons coupled to targets. The vertex can be used to build cross sections for collisions of two pairs of nucleons in AA scattering. The transversality of the constructed vertex is demonstrated as well as its good behaviour at large longitudinal momenta necessary for applications. Poles at zero values of longitudinal momenta are discussed and it is found that they remain in the amplitudes unlike in the case of a single projectile.

dc.description.sponsorship

value: The authors acknowledge Saint-Petersburg State University for a Research Grant 11.38.223.2015. This work has also been supported by the RFFI Grant 15-02-02097-a.

dc.language.iso

value: en

dc.publisher

value: Springer Berlin Heidelberg

dc.relation.ispartofseries

value: The European Physical Journal C;Vol.75 Issue 5 Article 222

dc.subject

value: Gluon Vertex

value: Polarisation Vector

value: Singular Term

value: Pole Contribution

value: Colour Factor

value: Inclusive Cross Section

value: Non-singular Term

value: Double Polis

value: Longitudinal Momentum

value: Gluon Production

value: Production Amplitude

value: Common Factor

value: Convolution

value: Effective Action

value: Pole Singularity

dc.title

value: Article


title: Hold-in, pull-in, and lock-in ranges of PLL circuits: rigorous  mathematical definitions and limitations of classical theory

dc.contributor.author

value: G. A. Leonov

value: N. V. Kuznetsov

value: M. V. Yuldashev

value: R. V. Yuldashev

dc.description.abstract

value:
The terms hold-in, pull-in (capture), and lock-in ranges are widely used by
engineers for the concepts of frequency deviation ranges within which PLL-based
circuits can achieve lock under various additional conditions. Usually only
non-strict definitions are given for these concepts in engineering literature.
After many years of their usage, F.~Gardner in the 2nd edition of his
well-known work, Phaselock Techniques, wrote "There is no natural way to define
exactly any unique lock-in frequency" and "despite its vague reality, lock-in
range is a useful concept." Recently these observations have led to the
following advice given in a handbook on synchronization and communications "We
recommend that you check these definitions carefully before using them." In
this survey it is shown that, from a mathematical point of view, in some cases
the hold-in and pull-in "ranges" may not be the intervals of values but a union
of intervals and thus their widely used definitions require clarification.
Rigorous mathematical definitions for the hold-in, pull-in, and lock-in ranges
are given. An effective solution for the problem on the unique definition of
the lock-in frequency, posed by Gardner, is suggested.

dc.subject

value: Mathematics - Dynamical Systems


title: Ontology design and individual cognitive peculiarities: A pilot study

dc.contributor.author

value: Gavrilova, Tatiana A.

value: Leshcheva, Irina A.

dc.description.abstract

value: The paper presents the main results of the KOMET (Knowledge and cOntent structuring via METhods of collaborative ontology design) project, which aims to develop a novel paradigm for knowledge structuring based on the interplay between cognitive psychology and ontology engineering. By the knowledge structure (a conceptual model) we define the main domain concepts and relations between them in the form of a graph, map or diagram. This approach considers individual cognitive styles and uses recent advances in knowledge engineering and conceptual structuring; it aims to create new, consistent and structurally holistic knowledge bases for various areas of science and technology. Two stages of research have been completed: research into correlations between the expert’s individual cognitive style and the peculiarities of the expert’s subject domain ontology development; and research into correlations between the expert’s individual cognitive style and the group ontology design (including design accomplished by groups of experts with either similar or different cognitive styles). The results of these research stages can be applied to organizing collaborative ontology design (especially for research and learning purposes), data structuring and other group analytical work. Implications for practice are briefly delineated.

dc.language.iso

value: English

dc.relation.ispartofseries

value: Expert Systems with Applications;Volume 42, Issue 8

value: ontologies

value: knowledge engineering

value: cognitive style

value: conceptual structuring

value: collaborative design

value: cognitive ergonomics

dcterms.publisher

value: Elsevier


dc.contributor.author

value: Abakumov, Evgeniy

dc.identifier.citation

value: E. Maksimova,  E. Abakumov Wildfire effects on ash composition and biological properties of soils in forest–steppe ecosystems of Russia Environ Earth Sci DOI 10.1007/s12665-015-4497-1

dc.description.abstract

value:
Soils affected by forest wildfires in Russia in
2010 were studied in postfire and unburned plots near
Togljatty city, Samara region. The microbial biomass,
basal respiration of the soil, and the ash composition dynamics
were investigated under the effect of forest fires
during the 3 years at the site of a surface forest fire, a
crown forest fire site, and a site unaffected by fire as a
control (unburned). Soil samples were collected at
0–15 cm. The analytic data obtained showed that wildfires
led to changes in the chemical composition of soil horizons
and increased their ash content. Fires led to the accumulation
of nutrients (P and K) in the fine earth of the soil.
Thus, when the upper horizons are burned, the ash arriving
on the soil surface enriches it with nutrients. The calcium
content was also increased, leading to an alkaline pH of the
upper soil horizons. The values of nutrients decreased as a
result of leaching out with a precipitation during the second
year after the fire. The unburned soils were characterized
by the greatest values of microbial biomass carbon in the
top horizon and the biggest values of basal respiration,
whereas both parameters decline in postfire soils. Nevertheless,
this influence did not extend to depths [10 cm.
Thus, the effects of fire on soils were recognized as a decrease
of microbiological activity.

dc.description.sponsorship

value:
This work was supported by the
Russian foundation for Basic research, projects 12-04-33017, 13-04-
90766, 14-04-32132, and 15-34-20844 and by the Saint-Petersburg
University research grant 1.37.151.2014.

dc.publisher

value: Springer

dc.subject

value: wild fires

value: soil

value: monitoring

value: organic matter

dc.type

value: Article

filename: env earth sci 2.pdf


title: Ice rule for a ferromagnetic nanosite network on the face-centered cubic lattice

dc.contributor.author

value: Mistonov, A.A.

value: Shishkin, I.S.

value: Dubitskiy, I.S.

value: Grigoryeva, N.A.

value: Eckerlebe, H.

value: Grigoriev, S.V.

dc.description.abstract

value: The magnetic properties of an inverse opal-like cobalt-based structure having the symmetry of the face-centered cubic lattice are studied. The magnetization reversal of the structure in a magnetic field applied along the [11¯¯¯011¯0] axis is described using a phenomenological model, which uses the ice rule for the local magnetization of nanostructure elements. This description predicts the absence of a long-range magnetic order in two <111> directions that are normal to the magnetic field. The magnetic structure is analyzed by smallangle neutron diffraction. Neutron diffraction patterns are measured in an external magnetic field varying from −1.2 to 1.2 T and applied along the crystallographic [11¯¯¯011¯0] direction. A magnetic contribution to the neutron scattering intensity is extracted. It is shown that this contribution is close to zero over the entire applied magnetic field range for all scattering planes that are normal to the field, which agrees well with the proposed model.

dc.language.iso

value: en


title: The masses of vector mesons in holographic QCD at finite chiral chemical potential

dc.contributor.author

value: Afonin, Sergey S.

value: Andrianov, Alexandr A.

value: Espriu, Domenec

dc.identifier.citation

value: Physics Letters B745, 52 (2015)

dc.description.abstract

value: Central heavy-ion collisions may induce sizeable fluctuations of the topological charge. This effect is expected to distort the dispersion relation for the hadron masses. We construct a general setup for a compact description of this phenomenon in the framework of bottom-up holographic approach to QCD. A couple of soft wall holographic models are proposed for the vector mesons. The states having different circular polarizations are shown to have different effective mass. The requirement of stability imposes strong constraints on the possible choice of models.

dc.description.sponsorship

value: RFBR Grant № 13-02-00127-a, Saint-Petersburg State University Grant № 11.38.189.2014 and Travel Grant № 11.42.1294.2014.

dc.publisher

value: Elsevier

dc.subject

value: Quantum Chromodynamics


title: Hybrid One-Dimensional 15-Crown-5-ether-uranyl-selenate Polymers in [K@(C10H20O5)][(UO2)(SeO4)(HSeO4)(H2O)]: Synthesis and Characterization

dc.contributor.author

value: Gurzhiy, Vladislav V.

value: Tyumentseva, Olga S.

value: Krivovichev, Sergey V.

value: Tananaev, Ivan G.

dc.description.abstract

value: The hybrid organic-inorganic uranyl selenate, [K@(C10H20O5)][(UO2)(SeO4)(HSeO4)(H2O)] (I), was prepared by isothermal evaporation from aqueous solutions. The crystal structure of I [orthorhombic, Pnma, a = 15.386(3), b = 10.771(2), c = 13.239(3) Å, V = 2194.0(7) Å3, Z = 4, R1 = 0.042] is based upon complex 15-crown-5-ether-uranyl-selenate polymeric units consisting of uranyl selenate chains decorated by [K@(15-crown-5)]+ complexes via strong ionic K+–O bonds. The 1D hybrid units are packed in a parquetted-like fashion and connected to each other by hydrogen bonds and residual van der Waals interactions.

dc.description.sponsorship

value: This work was supported by St. Petersburg State University (grant 3.38.136.2014) and President of Russian Federation grant for young scientists (no. MK-1737.2014.5 to V. V. G.). The XRD studies have been performed at the X-ray Diffraction Centre of St. Petersburg State University.

dc.publisher

value: Wiley

dc.relation.ispartofseries

value: Zeitschrift für anorganische und allgemeine Chemie;V. 641. Issue 6

dc.subject

value: Uranyl selenate

value: Crown ether

value: Potassium

value: Topology

value: Crystal structure

dc.title

value: Article


title: Synthesis of 3-aryl-6a-methyl-6-nitro-1-phenylhexahydrothieno[2,3-d]pyrazole 4,4-dioxides

dc.contributor.author

value: Berestovitskaya, V.M.

value: Efremova, I.E.

value: Lapshina, L.V.

value: Serebryannikova, A.V.

value: Abzianidze, V.V.

dc.description.abstract

value: Reaction of 2-benzylidene-3-methyl-4-nitro-3-thiolene 1,1-dioxides and phenylhydrazine affords 3-aryl-6a-methyl-6-nitro-1-phenylhexahydrothieno[2,3-d]pyrazole 4,4-dioxides in moderate yields.

dc.language.iso

value: en

dc.relation.ispartofseries

value: Mendeleev Communications;V. 25. Issue 3


title: СТАТЬЯ ЗНАЧИТ СТАТЬЯ: ОБ ОДНОМ КЛАССЕ ТАВТОЛОГИЧЕСКИХ КОНСТРУКЦИЙ В РУССКОМ ЯЗЫКЕ

dc.contributor.author

value: Vilinbakhova, Elena

dc.description.abstract

value: The study based on Internet and corpus data [RNC] deals with a special pattern of tautological constructions in Russian called metalinguistic tautologies. The notion was briefly introduced in 1996 by E. Miki as a label for a set of quite heterogeneous examples, but was not further developed. While other tautologies describe entities in the real world, metalinguistic tautologies refer to the use of a linguistic expression.  Such constructions show that the speaker is employing a word or an expression in its common, straight meaning. Therefore, they are most often used when context allows other possible interpretations of the linguistic expressions (such as euphemisation, irony, or hyperbole), and sometimes such alternatives are explicitly spelled out: Inexpensive means inexpensive, not poor quality. Metalinguistic tautologies are established in Russian with patterns Х znachit Х, Х oznachaet Х ‘Х means Х’, X eto X ‘Х is Х’, and are distinguished from homonymous constructions by their semantic and pragmatic features.

dc.language.iso

value: ru

dc.publisher

value: РГГУ

dc.subject

value: tautologies, metalinguistic constructions, Russian language, Internet


title: Квантовохимические расчеты повышенной точности

dc.contributor.author

value: Барановский, Виктор

dc.description

value:
Данное учебное пособие предназначено, прежде всего, для аспирантов и магистрантов, осваивающих
курсы «Квантово-химические методы в термохимии» и «Теория химических реакций». Оно является
продолжением учебника «Лекции по квантовой химии» для студентов кафедры квантовой химии и для всех,
интересующихся современными методами квантовохимических расчетов. С момента выхода этого учебного
пособия появился целый ряд процедур для проведения высокоточных квантовохимическиъ расчетов,
описанию которых посвящено данное руководство. Можно ожидать, что с развитием вычислительной
техники описанные здесь методы станут рутинной  процедурой, с которой весьма полезно познакомиться.

dc.subject

value: Квантовохимические расчеты

dc.type

value: Learning Object

filename: Расчеты_повышенной.pdf


title: Cyclometallated platinum(II) complexes containing NHC ligands: synthesis, characterization, photophysics and their application as emitters in OLEDs

dc.contributor.author

value: Solomatina, A I

value: Krupenya, D V

value: Gurzhiy, Vladislav V.

value: Zlatkin, I

value: Pushkarev, A P

value: Bochkarev, M N

value: Besley, N A

value: Bichoutskaia, E

value: Tunik, S P

dc.description.abstract

value: A series of square planar [Pt(N^C)(NHC)L] complexes containing cyclometallated N^C ligands (phenylpyridine and benzoquinoline) and N-heterocyclic carbene (NHC)--N^C = 2-phenylpyridine, 7,8-benzoquinoline; NHC = 1,3-dibenzylbenzimidazolium, 1,3-diethylbenzimidazolium, 1,3-dibenzylimidazolium; L = Cl, Br, -C2Ph--have been synthesized in moderate to good yields. The complexes obtained were characterized using chemical analysis, MS-ESI spectrometry, NMR spectroscopy and X-ray crystallography. The complexes display moderate to strong phosphorescence in solution (Q.Y. 0.3-7.9%) and in the solid state (Q.Y. 2.7-16.0%), which is related to metal modulated intraligand π-π* transitions located at the aromatic system of cyclometallated ligands with some contribution of the MLCT excited state. Emission lifetimes fall in the range of 0.2-1.5 μs in solution and amount up to 13 μs in the solid state. Analysis of the spectroscopic data together with the density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations clearly support this assignment and show negligible contribution of the auxiliary ligands to the emissive excited states. The compounds obtained were also used to prepare organic light emitting diode (OLED) devices, which display good luminance efficiency emitting in the green area of the visible spectrum.

dc.publisher

value: Royal Society of Chemistry

dc.relation.ispartofseries

value: Dalton Transactions;V. 44. Issue 16

dc.title

filename: 2015_Dalton_Nastya_Pt ocmpl.pdf


title: Discrete Morse theory for moduli spaces of flexible polygons, or  solitaire game on the circle

dc.contributor.author

value: Panina, G.

value: Zhukova, A.

dc.description.abstract

value:
We introduce a perfect discrete Morse function on the moduli space of a
polygonal linkage.
  The ingredients of the construction are: (1) the cell structure on the moduli
space, and (2) the discrete Morse theory approach, which allows to reduce the
number of cells to the minimal possible.

dc.description.sponsorship

value: RFBR project No.  15-01-0202

dc.language.iso

value: en

dc.subject

value: Discrete Morse theory

value: polygonal linkage

dc.type

value: Article


title: Bifunctional reactivity of amidoximes observed upon nucleophilic addition to metal-activated nitriles

dc.contributor.author

value: Bolotin, Dmitrii S

value: Demakova, Marina Ya

value: Novikov, Alexander S

value: Avdontceva, Margarita S

value: Kuznetsov, Maxim L

value: Bokach, Nadezhda A

value: Kukushkin, Vadim Yu

dc.description.abstract

value: Treatment of the aromatic nitrile complexes trans-[PtCl2(RC6H4CN)2] (R = p-CF3 NC1, H NC2, o-Cl NC3) with the aryl amidoximes p-R'C6H4C(NH2)=NOH (R' = Me AO1, H AO2, Br AO3, CF3 AO4, NO2 AO5) in all combinations, followed by addition of 1 equiv of AgOTf and then 5 equiv of Et3N, leads to the chelates [PtCl{HN=C(RC6H4)ON=C(C6H4R'-p)NC(RC6H4)═NH}] (1-15; 15 examples; yields 71-88% after column chromatography) derived from the platinum(II)-mediated coupling between metal-activated nitriles and amidoximes. The mechanism of this reaction was studied experimentally by trapping and identification of the reaction intermediates, and it was also investigated theoretically at the DFT level of theory. The combined experimental and theoretical results indicate that the coupling with the nitrile ligands involves both the HON and monodeprotonated NH2 groups of the amidoximes, whereas in the absence of the base, the NH2 functionality is inactive toward the coupling. The observed reaction represents the first example of bifunctional nucleophilic behavior of amidoximes. The complexes 1-16 were characterized by elemental analyses (C, H, N), high-resolution ESI(+)-MS, FTIR, and (1)H NMR techniques, whereas unstable 17 was characterized by HRESI(+)-MS and FTIR. In addition, 8·C4H8O2, 12, and 16·CHCl3 were studied by single-crystal X-ray diffraction.

dc.title

format: Text

size: 4 B


dc.contributor.author

value: Aleman, Alexandru

value: Baranov, Anton

value: Belov, Yurii

dc.identifier.citation

value: A. Aleman, A. Baranov, Yu. Belov, Subspaces of C\infty invariant under the differentiation, Journal of Functional Analysis, 268  (2015), 8, 2421-2439

dc.description.abstract

value: We prove that a proper differentiation invariant subspace of C\infty such that the restriction of the differentiation operator has a discrete spectrum is spanned by functions vanishing outside some closed interval and monomial exponentials corresponding to the spectrum if its density does not exceed  the critical value. In addition, we prove that the result is not necessarily true when  the density equals the  critical value. This answers a question posed by the first author and B. Korenblum.

dc.publisher

value: Elsevier

dc.subject

value: spectal synthesis, invariant subspace


dc.identifier.citation

value: A.D. Baranov, D.V. Yakubovich, One-dimensional perturbations of unbounded  selfadjoint operators with empty spectrum, Journal of Mathematical Analysis and Applications, 424 (2015), 2, 1404-1424

dc.description.abstract

value:
We study spectral properties of one-dimensional singular nonselfadjoint perturbations of an unbounded selfadjoint operator and give criteria for the possibility to remove the whole spectrum by a perturbation of this type. A counterpart of our results for the case of bounded operators provides a complete description of
compact selfadjoint operators whose rank one perturbation is a Volterra operator.

dc.language.iso

value: en

value: selfadjoint operator, singular rank one perturbation, inner function, entire function, Krein class


title: Quasiprobability distributions in stochastic wave-function methods

dc.contributor.author

value: Polyakov, Evgeny A.

value: Vorontsov-Velyaminov, Pavel N.

dc.description.abstract

value: Quasiprobability distributions emerging in the stochastic wave-function method of Carusotto et al. [Phys. Rev. A 63, 023606 (2001)] are investigated. We show that there are actually two types of quasiprobabilities. The first one, the “diagonal Hartree-Fock state projection” representation, is useful in representing the initial conditions for stochastic simulation in the most compact form. It defines antinormally ordered expansion of the density operator and normally ordered mapping of the observables to be averaged. We completely characterize the equivalence classes of this phase-space representation. The second quasiprobability distribution, the “nondiagonal Hartree-Fock state projection” representation, extends the first one in order to achieve stochastic representation of the quantum dynamics. We demonstrate how the differential identities of the stochastic ansatz generate the automorphisms of this phase-space representation. These automorphisms turn the stochastic representation into a gauge theory. The gauge transformations of the quasiprobability master equation are described. In particular, it is the analyticity of the stochastic ansatz that allows one to transform the master equation into the genuine Fokker-Planck equation. We demonstrate how the different variants of the stochastic wave-function method can be constructed, first by choosing a certain optimality criteria or constraints, and then by satisfying these criteria with a suitable choice of gauge. The problem of boundary terms is considered. It is demonstrated that the simple scheme with Fock states of Carusotto et al. is not subjected to this problem.

dc.description.sponsorship

value: Russian Foundation for Basic Reseach Grant No. 14-02-31109, Saint Petersburg State University Grant No. 11.50.1573.2013

dc.publisher

value: Americal Physical Society

value: Quantum Mechanics in Phase Space

value: Open Quantum Systems

value: Quantum Noise

value: Stochastic Differential Equations

value: Quantum Simulations

dc.type

value: Article

description: Full-text article


title: Simultaneous determination of iron (II) and ascorbic acid in pharmaceuticas based on flow sandwich technique

dc.contributor.author

value: Vakh, Christina

value: Freze, Elena

value: Pochivalov, Alexsey

value: Evdokimova, Ekaterina

value: Kamencev, Mihail

value: Moskvin, Leonid

value: Bulatov, Andrey

dc.identifier.citation

value: Journal of Pharmacological and Toxicological Methods 73 (2015) 56–62

dc.description.abstract

value: The simple and easy performed flow system based on sandwich technique has been developed for the simultaneous separate determination of iron (II) and ascorbic acid in pharmaceuticals. The implementation of sandwich technique assumed the injection of sample solution between two selective reagents and allowed the carrying out in reaction coil two chemical reactions simultaneously: iron (II) with 1,10-phenanthroline and ascorbic acid with sodium 2,6-dichlorophenolindophenol. For achieving of excellent repeatability and considerable reagent saving the various parameters such as flow rate, sample and reagent volumes, reaction coil length were also optimized. The limits of detection (LODs) obtained by using the developed flow sandwich-type approach were 0.2 mg L(-1) for iron (II) and 0.7 mg L(-1) for ascorbic acid. The suggested approach was validated according to the following parameters: linearity and sensitivity, precision, recoveries and accuracy. The sampling frequency was 41 h(-1).

dc.description.sponsorship

value:
This work was supported by the Russian Foundation for Basic
Research (project No. 13-03-00031-a). Scientific researches were
performed at the Center for chemical analysis and materials research
of St. Petersburg State University.

dc.publisher

value: Elsevier

dc.subject

value: Automation of pharmaceutical analysis

value: Flow analysis

value: Sandwich technique

value: Iron (II)

value: Ascorbic acid


title: Coupling of platinated triguanides with platinum-activated nitriles as a novel strategy for generation of dimetallic systems

dc.contributor.author

value: Serebryanskaya, Tatiyana V.

value: Novikov, Alexander S.

value: Gushchin, Pavel V.

value: Zolotarev, Andrey A.

value: Gurzhiy, Vladislav V.

value: Kukushkin, Vadim Yu.

dc.description.abstract

value:
One of two PtIV-activated propanenitriles in trans-[PtCl4(EtCN)2] is involved in platinum(IV)-mediated
nitrile–imine coupling with the platinum(II)-based metallacycles [PtCl2{NHvC(NR2)N(Ph)C(vNH)N(Ph)-
C(NR2)vNH}] [R2 = Me2 (1a), C5H10 (1b)] yielding diplatinum products, whose structures depend on molar
ratios between the reactants. At a 1 : 1 ratio, the mixed-valence platinum(II)/platinum(IV) species
[PtCl4{NHvC(NR2)N(Ph)C{v[(N(Et)CvNH)PtCl2(EtCN)]}N(Ph)C(NR2)vNH}] [R2 = Me2 (2a), (CH2)5 (2b)]
were generated, whereas at a 1 : 2 ratio the dinuclear platinum(II)/platinum(II) complexes [PtCl2{NHv
C(NR2)N(Ph)C{v[(N(Et)CvNH)PtCl2(EtCN)]}N(Ph)C(NR2)vNH}] [R2 = Me2 (3a), (CH2)5 (3b)] were obtained.
In contrast to the nitrile–imine coupling observed for the platinum(IV) dinitrile complex, the reaction
between the platinum(II) congener trans-[PtCl2(EtCN)2] and any one of 1a,b gives exclusively the substituted
dimetallic platinum(II)/platinum(II) products [PtCl2{NHvC(NR2)N(Ph)C{v[(NH)PtCl2(EtCN)]}N(Ph)-
C(NR2)vNH}] [R2 = Me2 (6a), (CH2)5 (6b)] featuring platinum-containing guanidine 1 as one of the ligands.
Complexes 2a,b, 3a,b, and 6a,b were characterized by elemental analyses (C, H, N), HRESI-MS, IR,
1H NMR spectroscopy, and DTA/TG. The molecular and crystal structure of 2a·2CDCl3 was additionally
studied by single-crystal X-ray diffraction. Complexes 2a,b undergo further redox transformation in solutions,
and single crystals of [PtCl2{NHvC(NMe2)N(Ph)C{v[(N(Et)CvNH)PtCl2(MeCN)]}N(Ph)C(NMe2)v
NH}]·2CH2Cl2 (3’a·2CH2Cl2) were obtained from 2a in a CH2Cl2–MeCN–C2H4Cl2 mixture and studied by
X-ray crystallography. The driving forces for the generation of diplatinum products 2 and 3 were elucidated
based on a quantum-chemical study.

dc.language.iso

value: en

dc.publisher

value: The Royal Society of Chemistry

dc.relation.ispartofseries

value: Dalton Transactions;44

dc.title

value: Article


title: Dmitrii Mileev and the restoration of wooden architectural monuments in early twentieth-century Russia

dc.contributor.author

value: Khodakovsky, Evgeny

value: Meliukh, Ekaterina

dc.description

value: This article brings to light the professional life of Dmitrii Vasil'evich Mileev (1878–1914), one of the leading Russian architects and architectural restorationists of the twentieth century. For various reasons, Mileev's work has not received much attention in Russian scholarly literature, and this article seeks to fill this gap by delving into the archives and publications of the Imperial Architectural Commission, as well as using other documents from the early 1900s. The focus is on the restoration of wooden architectural monuments of the Russian North, since Mileev was the first Russian architect to work out a systematic method of preservation that he followed while working on over fifty such buildings. The article continues its exploration into the Soviet period, taking note in particular of the theoretical and practical work of A. V. Opolovnikov, who continued Mileev's work. Together, their contribution to Russian culture was priceless, and their legacy helped to set the course for future Soviet restorationist efforts.

dc.publisher

value: Blackwell Publishing Ltd

dc.subject

value: Mileev, Russia, architecture and restorations, wooden architecture, Russian North, archival research, source studies, restoration of wooden architectural monuments

format: JPEG

description: Frontcover Volume 74, Issue 2, 1 April 2015


title: Schrödinger operator with a superposition of short-range and point potentials

dc.contributor.author

value: Gradusov, V A

value: Yakovlev, S L

dc.language.iso

value: ru

dc.relation.ispartofseries

value: ТЕОРЕТИЧЕСКАЯ И МАТЕМАТИЧЕСКАЯ ФИЗИКА;Том 183, номер 1

dc.title.alternative

value: Об операторе Шредингера с суперпозицией короткодействующего и точечного потенциалов

description: The first page of article


title: Сильно динамически устойчивые решения в динамических кооперативных играх

dc.contributor.author

value: Petrosyan, Leon A.

value: Петросян, Л. A.

dc.description.abstract

value:
В работе рассматриваются неантагонистические кооперативные дифференциальные игры, в которых
в качестве принципа оптимальности берется ядро. Предполагается, что ядро не пусто во всех подыграх
вдоль кооперативной траектории. Исследуется вопрос сильной динамической устойчивости ядра. Для игр двух и трех лиц удалось получить нетривиальные и достаточно простые условия существования сильно-динамически устойчивого ядра.

dc.language.iso

value: Russian

dc.subject

value: теория игр

value: дифференциальные игры

value: ядро

value: сильная динамическая устойчивость

dc.type

value: Presentation


dc.contributor.author

value: Grigoryev, Yury

value: Tsiganov, Andrey

dc.identifier.citation

value: Grigoryev Y.A., Tsiganov A.V., On bi-Hamiltonian formulation of the perturbed Kepler problem, J. Phys. A: Math. Theor. 48 (2015), 175206, 7 pages, arXiv:1504.02211.

dc.description.abstract

value: The perturbed Kepler problem is shown to be a bi-Hamiltonian system in spite of the fact that the graph of the Hamilton function is not a hypersurface of translation, which goes against a necessary condition for the existence of the bi-Hamiltonian structure according to the Fernandes theorem. In fact, the initial and perturbed Kepler systems are both isochronous systems and, therefore, the Fernandes theorem cannot be applied to them.

dc.language.iso

value: en

dc.publisher

value: J. Phys. A: Math. Theor.

dc.subject

value: bi-Hamiltonian geometry

value: Kepler problem

value: action-angle variables

dc.title

value: Article


title: Synthesis and structure of dinitrosyl iron complexes with secondary thiolate bridging ligands [Fe2(μ-SCHR2)2(NO)4], R = Me, Ph

dc.contributor.author

value: Davidovich, Pavel B.

value: Gurzhiy, Vladislav V.

value: Sanina, N.A.

value: Shchukarev, A.V.

value: Garabadzhiu, A.V.

value: Belyaev, A.N.

dc.description.abstract

value: New dinitrosyl iron complexes of binuclear structure [Fe2(μ-SCHMe2)2(NO)4] and [Fe2(μ-SCHPh2)2(NO)4] were first synthesized employing new method from Fe(CO)5, corresponding thiol, and EtONO. Complexes structures were determined by XRD technique. DFT calculations were performed to probe the cis-conformer structures in gas and solution phases. NO donor ability of the complex with isopropyl thiolate ligand was studied.

dc.description.sponsorship

value: The work has been supported by the Ministry of Education and Science of the Russian Federation (State Contract 14.B25.310013) and the Program of the Presidium of RAS “Fundamental sciences for medicine”. XRD study has been prepared at the X-ray Diffraction Centre of Saint-Petersburg State University. NMR studies were performed by S. Smirnov at the Centre for Magnetic Resonance of Saint-Petersburg State University

dc.publisher

value: Elsevier

dc.relation.ispartofseries

value: Polyhedron;V. 90.

dc.subject

value: Crystal structure

value: Thiolate ligands

value: Dinitrosyl iron complex

value: Nitric oxide donor

value: DFT calculations


title: Nonlinear dynamical model of Costas loop and an approach to the analysis of its stability in the large

dc.contributor.author

value: Юлдашев, Марат Владимирович

dc.description

value: Description

dc.description.abstract

value: Abstract

dc.description.sponsorship

value: SPbU, RNF

dc.language.iso

value: en

value: Subject Keywords


title: Uncertainty principle for the Cantor dyadic group

dc.contributor.author

value: Krivoshein, Aleksandr

value: Lebedeva, Elena

dc.description.abstract

value: We introduce a notion of localization for functions defined on the Cantor group. Localization is characterized by the functional UCd that is similar to the Heisenberg uncertainty constant for real-line functions. We are looking for dyadic analogs of quantitative uncertainty principles. To justify our definition we use some test functions including dyadic scaling and wavelet functions.

value: Localization; Dyadic analysis; The Cantor group; Uncertainty principle; Scaling function; Wavelet

dc.type

value: Article

description: Main article


title: Spectral synthesis in de Branges spaces

dc.contributor.author

value: Baranov, Anton

value: Belov, Yurii

value: Borichev, Alexander

dc.identifier.citation

value: A. Baranov, Yu. Belov, A. Borichev, Spectral synthesis in de Branges spaces,  Geometric and Functional Analysis (GAFA} 25  (2015), 2, 417-452

dc.description.abstract

value: We solve completely the spectral synthesis problem for reproducing kernels in the de Branges spaces $\he$. Namely, we describe the de Branges spaces such that every complete and minimal system of reproducing kernels with complete biorthogonal admits the spectral synthesis.

dc.publisher

value: Springer

dc.subject

value: de Branges space, reproducing kernel, spectral synthesis

dc.title

value: Spectral synthesis in de Branges spaces


title: Observation of Single-Spin Dirac Fermions at the Graphene/Ferromagnet Interface

dc.contributor.author

value: Usachov, Dmitry

value: Fedorov, Alexander

value: Otrokov, Mikhail M.

value: Chikina, Alla

value: Vilkov, Oleg

value: Petukhov, Anatoly

value: Rybkin, Artem G.

value: Koroteev, Yury M.

value: Chulkov, Evgueni V.

value: Adamchuk, Vera K.

value: Grüneis, Alexander

value: Laubschat, Clemens

value: Vyalikh, Denis V.

dc.description.abstract

value: With the discovery and first characterization of graphene, its potential for spintronic applications was recognized immediately. Since then, an active field of research has developed trying to overcome the practical hurdles. One of the most severe challenges is to find appropriate interfaces between graphene and ferromagnetic layers, which are granting efficient injection of spin-polarized electrons. Here, we show that graphene grown under appropriate conditions on Co(0001) demonstrates perfect structural properties and simultaneously exhibits highly spin-polarized charge carriers. The latter was conclusively proven by observation of a single-spin Dirac cone near the Fermi level. This was accomplished experimentally using spin- and angle-resolved photoelectron spectroscopy, and theoretically with density functional calculations. Our results demonstrate that the graphene/Co(0001) system represents an interesting candidate for applications in devices using the spin degree of freedom.

dc.description.sponsorship

value: The authors acknowledge Saint-Petersburg State University for a research Grants 11.37.634.2013 and 11.50.202.2015, RFBR (Grant 14-02-31150), and BMBF (Grant 05K12OD3). A.G. acknowledges support from the ERC Grant Super2D. M.M.O. and E.V.C acknowledge the financial support of the University of Basque Country UPV/EHU (Grant GIC07-IT-756-13) as well as of the Departamento de Educacion del Gobierno Vasco and the Spanish Ministerio de Ciencia e Innovacion (Grant FIS2010-19609-C02-01). We acknowledge Helmholtz Zentrum Berlin für Materialien und Energie for support within bilateral Russian-German Laboratory program.

dc.subject

value: Graphene, spin polarization, electronic structure, Dirac cone, spin-resolved ARPES

description: Article


title: Дипольное описание pp-взаимодействия

dc.contributor.author

value: Коваленко, Владимир

dc.description.abstract

value:
Неупругие протон-протонные столкновения при высоких энергиях рассматриваются в поперечных пространственных координатах. Сталкивающиеся адроны представлены ансамблями цветовых диполей. Для вероятности элементарного взаимодействия используются предписания дипольной каскадной модели Мёллера. Многопартонные столкновения учитываются в рамках эйконального подхода. Было рассмотрено два варианта модели – с учетом и без учета конфайнмента. Получена асимптотика профильной функции столкновения при больших прицельных параметрах. Подход был применен для нахождения наклона дифракционного конуса в упругом pp-рассеянии при высоких энергиях, произведено сравнение с другими моделями для описания профильных функций и с
экспериментальными данными.

dc.description.sponsorship

value: Работа выполнена при поддержке гранта СПбГУ 11.38.197.2014, специальной ректорской стипендии СПбГУ, а также гранта фонда «Династия».

dc.language.iso

value: ru

value: квантовая хромодинамика

value: амплитуда рассеяния

value: дипольная модель

value: наклон дифракционного конуса

dc.title

value: Дипольное описание pp-взаимодействия

dc.title.alternative

value: Dipole-based description of pp interaction

dc.type

value: Preprint

dc.description.altabstract

value: Inelastic proton-proton collisions at high energy are considered in the transverse coordinate space. Colliding hadrons are represented by ensembles color dipoles. For the probability of an elementary dipole interaction the prescriptions of Muller's dipole cascade model are used. Multiparton collisions are taken into account within the framework of the eikonal approach. Two versions of the model were considered - the one with and without confinement. The asymptotic behavior of the collision profile function at large impact parameters is obtained. The approach was used to find the slope of the diffraction cone in elastic pp-scattering at high energies, the results are compared with other models describing profile functions and with experimental data.

description: Main article


title: ЭВОЛЮЦИЯ ПОЧВ И ПОЧВЕННОГО ПОКРОВА

dc.contributor.author

value: Abakumov, Evgeniy

dc.identifier.citation

value: ЭВОЛЮЦИЯ ПОЧВ И ПОЧВЕННОГО ПОКРОВА Александровский А.Л., Макеев А.О., Булгаков Д.С., Абакумов Е.В., Архангельская Т.А., Белобров В.П., Борисов А.В., Борисова О.К., Васенев И.И., Величко А.А., Водяницкий Ю.Н., Воробьева Г.А., Гагарина Э.И., Герасименко Н.П., Голеусов П.В., Гольева А.А., Губин С.В., Демкин В.А., Демкина Е.В., Демкина Т.С. и др. Теория, разнообразие природной эволюции и антропогенных трансформаций почв / Российская академия наук; Институт физико-химических и биологических проблем почвоведения; Общество почвоведов имени В.В. Докучаева; Комиссия истории, философии и социологии почвоведения; Научный Совет РАН по проблемам почвоведения. Москва, 2015. 925 c

dc.description.abstract

value: Книга посвящена эволюции дневных почв и почвенного покрова России, Украины и Казахстана в голоцене. В первой части книги рассмотрены история исследований, изучение эволюции на разных уровнях организации почвенных систем, методы изучения эволюции и возраста почв, обосновано выделение частных почвенных профилей (минералогического, гидрологического, температурного, гумусового и других) и почвенных сукцессий как механизма эволюции почв. Рассмотрено функционирование почвенного покрова двух контрастных модельных объектов (почв поверхностных техногенных образований (футбольных полей) и почв областей с интенсивными потоками углеводородных газов из недр). Вторая часть книги посвящена разнообразию природной эволюции почв во времени и пространстве. Дан обзор почвообразования на протяжении фанерозоя, плейстоцена и особенностей изменения климата Земли в голоцене, как главного фактора природной эволюции современного почвенного покрова. Обобщены новейшие данные и проведен теоретический анализ эволюции почв тундровой и лесной зон, черноземов центральной и южной областей Восточно-Европейской равнины, почвенного покрова Западно-Сибирской равнины и равнин Казахстана, почв тундр и аласов Якутии, предгорий и низкогорий юга Средней Сибири, почв горных областей России, Украины и Центральной Азии. Рассмотрены проблемы миграции почвенных зон на границе экотонов тундра/лес, лес/степь и степь/пустыня, вторых гумусовых горизонтов, ритмичности и цикличности почвообразования в голоцене. В третьей части книги анализируется взаимодействие почвенного покрова и общества, история освоения человеком почвенного покрова Земли и Восточно-Европейской равнины. Рассмотрены основные формы антропогенных воздействий на почвы и почвенный покров, степень их глубины и пространственного распространения на примере почвенного покрова России. В заключении подведены наиболее общие итоги и намечены перспективы дальнейших исследований. Обобщение выполнено исследователями Институтов РАН – Института физико-химических и биологических проблем почвоведения, Института географии, Почвенного института им. В.В. Докучаева; МГУ им. М.В. Ломоносова (факультет почвоведения) и ряда других научных центров России.

dc.language.iso

value: other

dc.publisher

value: Геос

dc.subject

value: почвы

value: эволюция

dc.title

value: ЭВОЛЮЦИЯ ПОЧВ И ПОЧВЕННОГО ПОКРОВА

dc.type

value: Book

filename: Эволюция почв.pdf


dc.identifier.citation

value: G. A. Shamilishvili,  E. V. Abakumov,   A. G. Ryumin.  Assessment of the mobile forms of zinc and copper content in soil samples from areas of different land use on example of the Krasnogvardeisky District of the St. Petersburg // Environ Earth Sci DOI 10.1007/s12665-015-4379-6

dc.description.abstract

value:
The present study investigated the actual content of Zn and Cu mobile fractions (buffer extractable) in soils of
different land use scenarios within the Krasnogvardeisky District of the Saint Petersburg (Russia). The data were obtained via Atomic Adsorption Spectrophotometry, analyzing ammonium acetate buffer extracts (pH 4.8) of soil samples collected. The buffer-extracted metals are considered to be the most mobile fractions at given soil pH conditions. The results have shown low concentrations of mobile Zn and Cu in soils of  recreational, agricultural and even industrial areas, fluctuating relative to the local area soil background values (Zn = 1.2; Cu = 2.70 mg kg-1). Substantial levels of contamination were found in the loamy sand Technosol of residential land useamended with composted municipal solid wastes and savage sludge. Calculated geo-accumulation indices (Igeo), pollution indices (PI) and contamination factors (Cf) were of the higher values, indicating moderate to extremely high pollution levels with the mobile trace metals.
Median topsoil metal concentrations three times exceeded the
maximal permissible concentrations for soils (Zn = 23.00;
Cu = 3.00 mg kg-1), reaching the maximal values of
69.58 mg kg-1 for Zn and 10.17 mg kg-1 for Cu,
respectively.

dc.description.sponsorship

value:
This work was supported by Russian foundation
for basic research Project No. 12-04-33017 and by St. Petersburg
State University research Grant No. 1.37.151.2014.

dc.publisher

value: Springer

dc.subject

value: contamination

value: soil

value: Saint-Petersburg

value: copper

value: zinc

value: urban soils

dc.title

value: Article

filename: env eart sci.pdf


title: Azirinium ylides from α-diazoketones and 2H-azirines on the route to 2H-1,4-oxazines: three-membered ring opening vs 1,5-cyclization

dc.contributor.author

value: Rostovskii, Nikolai V.

value: Novikov, Mikhail S.

value: Khlebnikov, Alexander F.

value: Starova, Galina L.

value: Avdontseva, Margarita S.

dc.identifier.citation

value: Beilstein J. Org. Chem. 2015, 11, 302–312

dc.description.abstract

value: Strained azirinium ylides derived from 2H-azirines and α-diazoketones under Rh(II)-catalysis can undergo either irreversible ring opening across the N–C2 bond to 2-azabuta-1,3-dienes that further cyclize to 2H-1,4-oxazines or reversibly undergo a 1,5-cyclization to dihydroazireno[2,1-b]oxazoles. Dihydroazireno[2,1-b]oxazoles derived from 3-aryl-2H-azirines and 3-diazoacetylacetone or ethyl diazoacetoacetate are able to cycloadd to acetyl(methyl)ketene generated from 3-diazoacetylacetone under Rh(II) catalysis to give 4,6-dioxa-1-azabicyclo[3.2.1]oct-2-ene and/or 5,7-dioxa-1-azabicyclo[4.3.1]deca-3,8-diene-2-one derivatives. According to DFT calculations (B3LYP/6-31+G(d,p)), the cycloaddition can involve two modes of nucleophilic attack of the dihydroazireno[2,1-b]oxazole intermediate on acetyl(methyl)ketene followed by aziridine ring opening into atropoisomeric oxazolium betaines and cyclization. Azirinium ylides generated from 2,3-di- and 2,2,3-triaryl-substituted azirines give rise to only 2-azabuta-1,3-dienes and/or 2H-1,4-oxazines.

dc.language.iso

value: en

dc.publisher

value: Beilstein-Institut

dc.relation.ispartofseries

value: Beilstein Journal of Organic Chemistry;Vol. 15

dc.subject

value: nitrogen ylides

value: diazoketones

value: Azirines

filename: grafical abstract2.png


title: The special linear version of the projective bundle theorem

dc.contributor.author

value: Ananyevskiy, Alexey

dc.description.abstract

value:
A special linear Grassmann variety SGr(k,n) is the complement to the zero
section of the determinant of the tautological vector bundle over Gr(k,n). For
a representable ring cohomology theory A(-) with a special linear orientation
and invertible stable Hopf map \eta, including Witt groups and MSL[\eta^{-1}],
we have A(SGr(2,2n+1))=A(pt)[e]/(e^{2n}), and A(SGr(2,2n)) is a truncated
polynomial algebra in two variables over A(pt). A splitting principle for such
theories is established. We use the computations for the special linear
Grassmann varieties to calculate A(BSL_n) in terms of the homogeneous power
series in certain characteristic classes of the tautological bundle.

dc.title

description: Preprint version


title: Методические вопросы апробации премиальных систем на предприятиях судостроительного  комплекса города

dc.contributor.author

value: Величко, Елена Александровна

value: Давыдовский, Федор Николаевич

dc.description.abstract

value: В статье обосновывается необходимость разработки новой системы премирования и материального стимулирования персонала предприятий судостроительного комплекса города. Основной целью данной работы является создание механизма материальной заинтересованности сотрудников в результатах своего труда и повышение эффективности организации производства. В статье проанализированы недостатки действующей системы премирования на предприятиях отрасли: отсутствие системы оценки результативности сотрудников и мотивации за достигнутые результаты, преобладание методов премирования на основе «взаимных договоренностей», низкий уровень заинтересованности сотрудников в результатах труда. Для решения этих и ряда других проблем предложено разработать и внедрить систему премирования сотрудников на основе оценочных показателей стимулирования, разработать метод формирования соответствующих систем показателей.

dc.language.iso

value: ru

dc.publisher

value: Научный журнал НИУ ИТМО

dc.relation.ispartofseries

value: «Экономика и экологический менеджмент»;№ 3, 2015

dc.subject

value: система оплаты труда и материального стимулирования, система премиальных показателей, метод структурирования целей и задач, нормативы образования премиального фонда, критерии и принципы выбора премиальных показателей, мотивация, оценка результативности структурных подразделений.

description: "Основная статья"


title: Неправославные христианские исповедания в системе российской государственности (конец XIX в. – июль 1914 г.)

dc.contributor.author

value: Амбарцумов, Иван Владимирович

dc.description.abstract

value: В диссертации рассматривается система государственного управления неправославными христианскими религиозными сообществами в Российской империи, показана эволюция этой системы в период с начала 80-х гг. XIX в. по начало Первой мировой войны. Сопоставляется положение в Российском государстве различных групп неправославных христиан: последователей инославных исповеданий, сектантов, старообрядцев. Исследован существовавший в Российской империи в указанный период порядок оформления переходов из одних христианских исповеданий в другие, из нехристианских религий в христианские и обратно, показано, каким образом этот порядок действовал на практике. Рассмотрена систему государственного регулирования браков неправославных христиан между собой, с православными и с нехристианами (брачные законы, их соотношение с внутренними каноническими нормами христианских конфессий и реализацию действовавших правил на практике).

value: христианство, инославные исповедания, секты, католичество, протестантизм, армянская апостольская церковь, армяно-католики, старообрядцы, штундизм, свобода совести, семейное право

dc.type

value: Preprint

filename: Амбарцумов И.В. Диссертация.pdf


title: Spectroscopic constants and potential energy curves of some iodine valence ungerade weakly bound states

dc.contributor.author

value: Baturo, Vera

value: Cherepanov, Igor

value: Lukashov, Sergey

value: Poretsky, Sergey

value: Pravilov, Anatoly

dc.description.abstract

value: Luminescence spectra corresponding to transitions from β1g, G1g, D'2g, and g0-g ion-pair states of an iodine molecule to weakly bound valence states 1u, 2u, and 0-u, correlating with the I(2P3/2) + I(2P1/2) (ab) and I(2P1/2) + I(2P1/2) (bb) dissociation limits, respectively, have been observed and analyzed. Energies of vibrational levels, spectroscopic constants, and potential energy curves of the valence states have been determined. The 0-u state is shown to be bound by 488(2) cm−1 and placed lower than 1u(bb) and 0+g(bb), unlike ab initio estimations.

dc.publisher

value: IOP Publishing Ltd

dc.title

value: Article


title: Bifractional Brownian motion: existence and border cases

dc.contributor.author

value: Mikhail Lifshits

value: Ksenia Volkova

dc.description.abstract

value:
Bifractional Brownian motion (bfBm) is a centered Gaussian process with
covariance \[
  R^{(H,K)}(s,t)=
  2^{-K} \left( \left(|s|^{2H}+|t|^{2H} \right)^{K}-|t-s|^{2HK}\right),
  \qquad s,t\in R. \] We study the existence of bfBm for a given pair of
parameters $(H,K)$ and encounter some related limiting processes.

dc.language.iso

value: en

dc.publisher

value: ESAIM: Probability and Statistics

dc.subject

value: Mathematics - Probability


title: Molecular dynamics simulation of spin-lattice NMR relaxation in poly-L-lysine dendrimers: manifestation of the semiflexibility effect

dc.contributor.author

value: Markelov, Denis A

value: Falkovich, Stanislav G

value: Neelov, Igor M

value: Ilyash, Maxim Yu

value: Matveev, Vladimir V

value: Lähderanta, Erkki

value: Ingman, Petri

value: Darinskii, Anatolii A

dc.description.abstract

value: NMR relaxation experiments are widely used to investigate the local orientation mobility in dendrimers. In particular, the NMR method allows one to measure the spin-lattice relaxation rate, 1/T1, which is connected with the orientational autocorrelation function (ACF) of NMR active groups. We calculate the temperature (Θ) and frequency (ω) dependences of the spin-lattice NMR relaxation rates for segments and NMR active CH2 groups in poly-L-lysine (PLL) dendrimers in water, on the basis of full-atomic molecular dynamics simulations. It is shown that the position of the maximum of 1/T1(ω) depends on the location of the segments inside the dendrimer. This dependence of the maximum is explained by the restricted flexibility of the dendrimer. Such behavior has been predicted recently by the analytical theory based on the semiflexible viscoelastic model. The simulated temperature dependences of 1/T1 for terminal and inner groups in PLL dendrimers of n = 2 and n = 4 generations dissolved in water are in good agreement with the NMR experimental data, which have been obtained for these systems previously by us. It is shown that in the case of PLL dendrimers, the traditional procedure of the interpretation of NMR experimental data - when smaller values of 1/T1 correspond to higher orientation mobility - is applicable to the whole accessible frequency interval only for the terminal groups. For the inner groups, this procedure is valid only at low frequencies.

dc.publisher

value: Phys. Chem. Chem. Phys.


title: Моделирование взаимодействия воздушной взрывной волны с преградами

dc.contributor.author

value: Карпенко, Антон Геннадьевич

value: Емельянов, Владислав Николаевич

dc.description.abstract

value:
В работе производится решение системы одномерных уравнений движения газа, находятся распределение параметров после воздушной взрывной волны. В некоторой точке, в которой можно считать ударную волну прямой по отношению к преграде, производится измерение значения параметров во времени. Тем самым, получается распределения параметров во времени в этой точке. Затем эти распределения параметров во времени использованы как нестационарные граничные условия для расчета многомерных задач взаимодействия. Так как временные шаги в многомерном расчете могут не совпадать с шагами для одномерного расчета, на каждом шаге производится интерполяция данных.
В работе выполнено сравнение расчетов распространения ударной волны в двумерной постановке с заданием нестационарных граничных условий и одномерного расчета с этими же параметрами. Выполнен трехмерный расчет взаимодействия воздушной ударной волны с кубической преградой расположенной под углом к фронту волны.

dc.language.iso

value: ru

dc.type

value: Thesis

format: Microsoft Word


title: THE STAVE CHURCHES OF MEDIAEVAL NORWAY

dc.contributor.author

value: Khodakovsky, Evgeny

dc.description.abstract

value:
The monograph presents a detailed panorama
of the 12th–15th-century wooden religious
architectural monuments located in
southern and central Norway. These unique
churches have a timber-frame (“stave”) construction
and make up a complex of some of
the most ancient surviving wooden buildings
in the world. Despite this, while of indisputable
artistic merit and historical significance
the stave churches of mediaeval Norway remain
insufficiently studied by Russian scholars.
In that respect the monograph is a first attempt
to summarize the history and specific
character of Norwegian wooden church
buildings. It proposes a variant method of
classifying the structures and is accompanied
by a detailed bibliography. The stave churches
of Norway are analyzed in the broad context
of wooden construction in the 7th–11th
centuries in the British Isles, Denmark and
Sweden, revealing them as a striking and original
manifestation of the Norwegian architectural
genius against the background of
the general picture of mediaeval construction.
It is only natural that in Norway, situated
on the periphery of Europe, art acquired
from the outset a distinctive local “endemic”
character. The same factors also determined
the unique character of the evolution of Norwegian
construction, which was to a large extent
founded upon the country’s domestic
creative resources and retained its originality
for centuries.

dc.publisher

value: Aurora Art Publishers

dc.subject

value: stave churches, Norway, medieval architecture, wooden architecture

dc.title

value: THE STAVE CHURCHES OF MEDIAEVAL NORWAY

value: Book

filename: Stave churches of Mediaeval Norway English Summary.pdf

description: Front cover and English summary


title: Forward-backward multiplicity correlations in pp collisions at  $\sqrt{s}$=0.9, 2.76 and 7 TeV

dc.contributor.author

value: ALICE Collaboration

dc.description.abstract

value:
The strength of forward-backward (FB) multiplicity correlations is measured
by the ALICE detector in proton-proton (pp) collisions at $\sqrt{s}=0.9$, 2.76
and 7 TeV. The measurement is performed in the central pseudorapidity region
($|\eta| < 0.8$) for the transverse momentum $p_{\rm T}>0.3$ GeV/$c$. Two
separate pseudorapidity windows of width ($\delta \eta$) ranging from 0.2 to
0.8 are chosen symmetrically around $\eta=0$. The multiplicity correlation
strength ($b_{\rm cor}$) is studied as a function of the pseudorapidity gap
($\eta_{\rm gap}$) between the two windows as well as the width of these
windows. The correlation strength is found to decrease with increasing
$\eta_{\rm gap}$ and shows a non-linear increase with $\delta\eta$. A sizable
increase of the correlation strength with the collision energy, which cannot be
explained exclusively by the increase of the mean multiplicity inside the
windows, is observed. The correlation coefficient is also measured for
multiplicities in different configurations of two azimuthal sectors selected
within the symmetric FB $\eta$-windows. Two different contributions, the
short-range (SR) and the long-range (LR), are observed. The energy dependence
of $b_{\rm cor}$ is found to be weak for the SR component while it is strong
for the LR component. Moreover, the correlation coefficient is studied for
particles belonging to various transverse momentum intervals chosen to have the
same mean multiplicity. Both SR and LR contributions to $b_{\rm cor}$ are found
to increase with $p_{\rm T}$ in this case. Results are compared to PYTHIA and
PHOJET event generators and to a string-based phenomenological model. The
observed dependencies of $b_{\rm cor}$ add new constraints on phenomenological
models.

dc.subject

value: Nuclear Experiment


title: Conformational and phase transitions in DNA - Photosensitive surfactant solutions: Experiment and modeling

dc.contributor.author

value: Kasyanenko, N

value: Lysyakova, L

value: Ramazanov, R

value: Nesterenko, A

value: Yaroshevich, I

value: Titov, E

value: Alexeev, G

value: Lezov, A

value: Unksov, I

dc.description.abstract

value: DNA binding to trans- and cis-isomers of azobenzene containing cationic surfactant in 5 mM NaCl solution was investigated by the methods of dynamic light scattering (DLS), low-gradient viscometry (LGV), atomic force microscopy (AFM), circular dichroism (CD), gel electrophoresis (GE), flow birefringence (FB), UV–Vis spectrophotometry. Light-responsive conformational transitions of DNA in complex with photosensitive surfactant, changes in DNA optical anisotropy and persistent length, phase transition of DNA into nanoparticles induced by high surfactant concentration, as well as transformation of surfactant conformation under its binding to macromolecule were studied. Computer simulations of micelles formation for cis- and trans-isomers of azobenzene containing surfactant, as well as DNA-surfactant interaction, were carried out. Phase diagram for DNA-surfactant solutions was designed. The possibility to reverse the DNA packaging induced by surfactant binding with the dilution and light irradiation was shown. © 2014 Wiley Periodicals, Inc. Biopolymers 103: 109–122, 2015.

dc.language.iso

value: en

dc.publisher

value: Biopolymers

dc.relation.ispartofseries

value: Volume 103, Issue 2, pages 109–122,;

value: DNA-surfactant complexes

value: light-induced DNA de-compaction

value: phase diagram

value: DNA volume and persistent length

dc.type

value: Article


title: Алгоритм пересчета образующих конечнопорожденного нечеткого конуса при добавлении образующей к его двойственному конусу

dc.contributor.author

value: Басков, О.В.

dc.identifier.citation

value: Ж. вычисл. матем. и матем. физ., 2015, том 55,	номер 2,	страницы 207–212

dc.description.abstract

value: Исследуется задача о нахождении образующих нечеткого конуса, двойственного к заданному конечнопорожденному нечеткому конусу. Рассматривается случай, в котором изначально известны образующие пары нечетких взаимодвойственных конусов, а затем к одному из них добавляется одна или несколько образующих. Приводится алгоритм нахождения образующих двойственного к нему нечеткого конуса. Алгоритм может найти применение в задачах многокритериальной оптимизации.

dc.language.iso

value: ru

dc.publisher

value: Журнал вычислительной математики и математической физики

dc.subject

value: теория нечетких множеств, нечеткий конус, алгоритм нахождения образующих двойственного к нему нечеткого конуса, многокритериальная оптимизация

dc.title

description: Abstract

size: 10 kB


title: Synthesis of new porphyrin-fullerene dyads capable of forming charge-separated states on a microsecond lifetime scale

dc.contributor.author

value: Konev, Alexander S

value: Khlebnikov, Alexander F

value: Prolubnikov, Pavel I

value: Mereshchenko, Andrey S

value: Povolotskiy, Alexey V

value: Levin, Oleg V

value: Hirsch, Andreas

dc.description.abstract

value: A series of covalently linked axially symmetric porphyrin-fullerene dyads with a rigid pyrrolo[3,4-c]pyrrolic linker enabling a fixed and orthogonal arrangement of the chromophores has been synthesized and studied by means of transient absorption spectroscopy and cyclic voltammetry. The lifetime of the charge-separated state has been found to depend on the substituents on the porphyrin core, reaching up to 4 μs for a species with meso-(p-MeOC6H4) substituents. The ground and excited electronic states of model compounds have been calculated at the DFT and TD-DFT B3LYP(6-31G(d)) levels of theory and analyzed with regard to the effect of the substituent on the stabilization of the charge-separated state in the porphyrin-fullerene ensemble with a view to explaining the observed dependence.

filename: Chemistry2015_Synthesis of New Porphyrin–Fullerene Dyads Capable of Forming.pdf