Showing papers by "Russian Academy of Sciences published in 1981"
TL;DR: In this paper, it was proved that the counterterm for an arbitrary 4-loop Feynman diagram in an arbitrary model is calculable within the minimal subtraction scheme in terms of rational numbers and the Riemann ζ-function in a finite number of steps via a systematic "algebraic" procedure involving neither integration of elementary, special, or any other functions, nor expansions in and summation of infinite series of any kind.
1,928 citations
TL;DR: In this article, a method of evaluating massless propagator-type Feynman integrals is presented, which guarantees that the counterterm of an arbitrary 4-loop diagram can be calculated analytically within the minimal substraction scheme.
1,142 citations
TL;DR: In this article, the growth rate of homoepitaxial diamond films reached 1 μm/h at 1000°C; film properties were identical to those of bulk crystals.
981 citations
TL;DR: In this article, the results of an investigation of acid and some similar forms of bovine and human a-lactalbumins are presented, which show that these forms are compact, have secondary structure similar to the native one but their tertiary structure can slowly fluctuate.
582 citations
TL;DR: In this paper, the ionization potential of the complex anions BO 2, AlO 2, NO 3, PO 3, ClO 4, MgF 3, BF 4, AlF 4, SiF 5 −, and PF 6 − were calculated using a self-consistent discrete variational Xα method.
466 citations
TL;DR: In this article, Markov partitions for some classes of dispersed billiards were constructed and using these partitions, the central limit theorem of probability theory and Donsker's Invariance Principle for Lorentz Gas with periodic configuration of scatterers were constructed.
Abstract: In our previous paper Markov partitions for some classes of dispersed billiards were constructed. Using these partitions we estimate the decay of velocity auto-correlation function and prove the central limit theorem of probability theory and Donsker's Invariance Principle for Lorentz Gas with periodic configuration of scatterers.
423 citations
TL;DR: In this paper, the restrictions on elementary particle properties which can be derived from cosmological and astrophysical data are considered, and the inverse relations between micro- and macrophysics are also discussed, in particular the origin of the baryon asymmetry of the universe.
Abstract: The restrictions on elementary particle properties which can be derived from cosmological and astrophysical data are considered. The inverse relations between micro- and macrophysics are also discussed, in particular the origin of the baryon asymmetry of the universe.
318 citations
TL;DR: In this article, it was shown that the eyelotron auto-resonance maser is the most effective free electron laser (Doppertron) at milimetere and submillimetre wavelengths.
Abstract: As follows from theory, supported by experiment, if the electron energy grows to ∼ 1 McV the gyroton preserves its capability to produce single-mode radiation in the millimetere wave range with rather high efficiency. If the electron energy is ultra-relativistic (≳ 1 McV), preference must be given to the eyelotron auto-resonance maser, which is, in principle, the most effective type of free electron laser (‘ doppertron’) at milimetere and submillimetre wavelengths.
294 citations
TL;DR: In this article, a review is devoted to an examination of quantum systems possessing stochasticity in the classical limit, and the problem of quantization of systems fulfilling the stochasticallyity condition is connected both with a wide class of problems which are physical in principle (destruction of quantum numbers due to interactions, statistics of the energy spectrum, kinetic description and so on) and with applications (molecular dynamics, interaction of atoms and molecules with a strong radiation field and such on).
269 citations
TL;DR: The complete nucleotide sequence of the 25 S rRNA gene from one rDNA repeating unit of Saccharomyces cerevisiae has been determined and striking sequence homology is observed with known 5'- and 3'-end terminal segments of L-rRNA from other eukaryotes.
Abstract: The complete nucleotide sequence of the 25 S rRNA gene from one rDNA repeating unit of Saccharomyces cerevisiae has been determined The corresponding 25 S rRNA molecule contains 3392 nucleotides and has an estimated relative molecular mass (Mr, Na-salt) or 117 x 10(6) Striking sequence homology is observed with known 5'- and 3'-end terminal segments of L-rRNA from other eukaryotes Possible models of interaction with 58 S rRNA are discussed
208 citations
TL;DR: This paper demonstrates the applicability of the Mossbauer effect to the study of the dynamic behaviour of proteins by measuring the Lamb-Mossbauer factor f′ of a polycrystalline sample of metmyoglobin.
TL;DR: In this paper, it was shown that in an arbitrary Lagrangian system in the first nontrivial order of the small parameter asymptotic scheme for a system of solitons with close velocities, a Lagrangians may be introduced analogous to that for classical particles with a pair interaction potential.
TL;DR: In this paper, a solution to van der Waerden's problem is presented, which is hoped that the solution of this problem will stimulate new and vigorous interest in the theory of permanents and related topics.
TL;DR: In this paper, the authors present results of a comprehensive analysis that included weaker bursts, which indicate that the presence of lines in the γ-burst spectra is a characteristic rather than an exceptional feature.
Abstract: Venera 11 and Venera 12 have detected emission and absorption lines in the energy spectra of many γ-ray bursts. The similarity between the spectral features observed during different events reveals the similarity in physical conditions and processes which occur within the burst sources. These lines are the most convincing evidence that the γ-burst sources contain neutron stars with a strong magnetic field. We present here results of a comprehensive analysis that included weaker bursts, which indicate that the presence of lines in the γ-burst spectra, in particular of absorption lines in the region 30–70 keV is a characteristic rather than an exceptional feature.
TL;DR: Intravital microfilming by means of a dark-field contact epiobjective was used for measuring capillary blood flow velocity in the brain and skeletal muscles of the rat to indicate that this range of velocities is optimal to adequately supply neurons with oxygen.
TL;DR: In this article, the evolution of Tethys is analyzed on the basis of ophiolitic geology, reconstruction of continental margins, and plate kinematics, and the North Anatolian-Minor Caucasian-South Caspian ophio-naphiolitic belt is considered to be the major suture of Palaeozoic tethys, dividing its southern carbonate shelf from the Pontian-Caucasian-Turanian active margin.
TL;DR: In this article, a short resume of the data on chlorine reaction at RuO2 and TTiO2 electrodes is given, and the three step mechanism of the reaction with the rate determining transfer of the second electron and the formation of the nominally unipositive chlorine as an intermediate is substantiated.
TL;DR: In this article, it was shown that the quantity of low molecular weight chromatin fragments formed 6 h after irradiation increases up to the doses of 3 Gy, then remains constant up to 30 Gy and decreases at doses 100 to 300 Gy.
TL;DR: In this article, a phenomenological theory of the size dependence of the melting temperature of small crystalline particles is offered Fluctuations and deviation of the crystals form from the equilibrium one are shown to produce a considerable effect on the melting of small particles and the fraction of the melted particles is determined by the curves of temperature dependence for integral intensity of one of the reflexes of the electron diffraction pattern.
Abstract: A phenomenological theory of the size dependence of the melting temperature of small crystalline particles is offered Fluctuations and deviation of the crystals form from the equilibrium one are shown to produce a considerable effect on the melting of small particles An experimental study of the melting of small particles of Sn, Pb, Bi, and In in island films is carried out The fraction of the melted particles is determined by the curves of temperature dependence for integral intensity of one of the reflexes of the electron diffraction pattern The results obtained by the authors are easy to describe with the thermodynamic theory taking into account the effect of fluctuations and nonequilibrium habit
[Russian Text Ignored]
TL;DR: In this paper, the spectral properties of hydroxyl groups in decationized and cationic forms of zeolites, X, Y, and mordenite have been studied for the first time in a wide spectral range, including the fundamental stretching vibrations of OH bonds, their overtones and combination bands.
TL;DR: The three-dimensional structure of catalase from the fungus Penicillium vitale is analysed and the haem group has been identified, and the active site localized using the specific inhibitor 3-amino-1:2:4-triazole.
Abstract: Catalase (H2O2 : H2O2-oxidoreductase, EC 1.11.1.6) is an enzyme that catalyses decomposition of hydrogen peroxide to oxygen and water, and is present in all aerobic cells. All catalases studied so far are tetrameric, each subunit (molecular weight ∼60,000) being formed by a single polypeptide chain with haemin as a prosthetic group1,2. Catalase is one of the most efficient enzymes known, resulting in reaction rates approaching the diffusion-controlled limit. Knowledge of the three-dimensional structure of catalase should help to increase our understanding of its mechanism of action, which is at present rather poor. It will also be of interest to compare the structure of catalase with that of other haem proteins, particularly from the point of view of evolutionary relationships. Thus, we have now analysed the three-dimensional structure of catalase from the fungus Penicillium vitale. From an electron density map at 3.5 A resolution it was possible to trace the polypeptide chain. The haem group has been identified, and the active site localized using the specific inhibitor 3-amino-1:2:4-triazole. P. vitale catalase subunits have been shown to be composed of three domains, with α + β, α and α/β type secondary structures respectively. Comparison with the structure of beef liver catalase3 shows that the latter enzyme lacks the C-terminal domain of the P. vitale enzyme.
TL;DR: In this article, the effect of diffraction and dispersion on three wave coupling is investigated and the existence of stable three-dimensional solitons is shown, which is similar to modulational instability of quasimonochromatic waves.
TL;DR: Theoretical and experimental investigations into the action of laser radiation pressure on atoms are reviewed in this article, where the authors discuss possible applications of light pressure to various fields of physics.
TL;DR: In this article, numerical solutions of barotropic modons are examined to assess the accuracy with which they can be calculated, their behavior under the influence of dissipation, and their resistance to perturbations.
TL;DR: Calcium binding to alpha-lactalbumin : structural rearrangement and association constant evaluation by means of intrinsic protein fluorescence changes.
TL;DR: In this article, the interdisciplinary theoretical and practical problems involved in the development of devices analogous to lasers for generation of coherent radiation in the 6- to 120-keV photon energy range by stimulated emission of recoilless radiation from nuclear isomers are discussed in depth with a comprehensive bibliography.
Abstract: The interdisciplinary theoretical and practical problems involved in the development of devices analogous to lasers for generation of coherent radiation in the 6- to 120-keV photon energy range by stimulated emission of recoilless radiation from nuclear isomers are discussed in depth with a comprehensive bibliography.
TL;DR: In this article, the Fourier transform infrared spectra of the inversion-rotation transitions have been measured with 0.010-cm −1 resolution between 40 and 300 cm −1 in the ground state and ν 2 excited states of 14 NH 3.
TL;DR: In this paper, the statistical physics of liquid-crystalline phase in the solutions of stiff chain macromolecules are discussed. But the main focus of the paper is on the analysis of the phase diagram for the liquid crystal transition in the solution of rigid rods.
Abstract: This article deals with some topics of the statistical physics of liquid-crystalline phase in the solutions of stiff chain macromolecules. These topics include: the problem of the phase diagram for the liquid-crystalline transition in the solutions of completely stiff macromolecules (rigid rods); conditions of formation of the liquid-crystalline phase in the solutions of semiflexible macromolecules; possibility of the intramolecular liquid-crystalline ordering in semiflexible macromolecules; structure of intramolecular liquid crystals and dependence of the properties of the liquid-crystalline phase on the microstructure of the polymer chain.
TL;DR: The role of nonlocal dielectric response of a polar solvent in the fundamental ion-solvent and ion-ion interactions is discussed in this article, and a number of consequences of the nonlocal screening theory are reviewed both for homogeneous and interfacial systems.