publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
|---|---|---|---|
1980-09-01 | Within the RPA approach for T =0, the excitations of the Heisenberg spin glass system Eu_ x Sr_1− x S are studied by numerical methods, using a continued fraction algorithm. Both the density of states g(E) and also the spectral function S ( q , E ) are calculated for systems with (16)^3 sites, with x =0.4, 0.5, and 0.6... | Excitations in Heisenberg spin glasses | null |
1980-09-01 | A 21 cm absorption measurement over a long path length free of the effects of differential galactic rotation indicates the existence of two distinct cloud populations in the plane. One of them consisting of cold, dense clouds has been well studied before. The newly found hot clouds appear to be at least five times more... | Evidence for a large population of shocked interstellar clouds | null |
1980-09-01 | Total and semi-inclusive cross sections, longitudinal and transverse momentum distributions and spin density matrix elements of the K ^*+(892) and K ^*0(892) produced in the inclusive reactions K ^+ p → K ^*+(892)+ X and K ^+ p → K ^*0(892)+ X at 32 GeV/ c are studied in detail. The inclusive spectra of the K ^*(892) a... | InclusiveK
^*+(892) andK
^*0(892) production inK
^+
p interactions at 32 GeV/c
| null |
1980-08-01 | A study is made of the scattering of a plane linearly polarized electromagnetic wave by an electron in a magnetic field. The cross section of the process is obtained separately for the π and σ components of the polarization of the incident and scattered waves. The dependence of the cross section on the spin orientation... | Compton effect in a magnetic field with allowance for polarization effects | null |
1980-07-01 | Calculation of the nonlinear aerodynamic characteristics of a wing of finite span | null | |
1980-06-01 | We discuss the spin structure of N=L=0 and N=L=1 mesons in terms of the one-gluon exchange model with scalar confinement of quarks. SU(3)_flavour is broken by taking different masses for the quarks and the SU (3) breaking of the nonperturbed hamiltonian is shown to be very important in understanding the hyperfine split... | Gluon exchange in meson spectroscopy | null |
1980-04-01 | First integrals and stationary states for quantum Heisenberg spin dynamics | null | |
1980-03-01 | By means of the Cristiansen filter method we measured on filters containing powder, filings or wires of silver or powder of indium oxide the coherent scattering lengths for the bound atoms of the following isotopes: b (^107Ag)=7.64±0.04 fm, b (^109Ag)=4.19±0.03 fm b (nat.Ag)=5.97±0.01 fm, b (^113In)=5.39±0.06 fm b (^11... | Slow neutron scattering lengths of the isotopes of silver and indium | null |
1980-03-01 | The temperature dependence of the kinetics of spin exchange between hydrated divalent cobalt ions and 2,2,6,6-tetramethylpiperidone-N-oxyl radicals | null | |
1980-01-01 | The electron spin resonance of Mn(H_2O)^2+ _6 and of Cu(H_2O)^2+ _6 ions was used to investigate the mobility and the freezing properties of water adsorbed on silica gel samples with pore diameters of 4, 6, 20, and 100 nm. The lineshape analysis of the esr spectra shows that the first two or three layers of water molec... | Molecular Dynamics in Water Solutions Adsorbed on Porous Solids Studied By ESR of Paramagnetic Probes | null |
1980-01-01 | The creation of ordered structures in nonlinear many body systems far from thermal equilibrium is a subject of increasing interest. In particular, the vast field of nonlinear optics has provided many examples of systems showing the effects of cooperative behaviour. The best known is the laser where the analogy with pha... | Collective Effects in Rasers | null |
1980-01-01 | Among many kinds of biological interfaces, the interest is focused here on membranes. Most of the ESR and NMR studies concern phospholipid systems. Elementary principles of ESR of nitroxide spin probes are first recalled. The fundamental feature is the anisotropic motion of these probes inserted in bilayers structures.... | ESR and NMR Studies of Biological Interfaces. Membranes | null |
1980-01-01 | The spin probe technique is employed to study liquid-crystalline side chain polymers [1], oriented in a high frequency electric field [2]. Temperature and angular dependent electron spin resonance spectra are analyzed, using a comprehensi ve lineshape model [3]. Computer simulations provide the order parameters P2 and ... | Spin Probe Studies of Oriented Liquid-Crystalline Polymers | null |
1980-01-01 | On the prequantum description of spinning particles in an external gauge field | null | |
1980-01-01 | Macroscopic description of spin glasses | null | |
1980-01-01 | Spin glasses are magnets where interactions between the spins are “in conflict” with each other , due to some disorder in the system. No conventional long range order (anti-)ferromagnetism etc. can occur but only a “transition” to a “state” where the spins are “frozen in” in random directions. The nature of both this t... | Spin Glasses: A Brief Review of Experiments, Theories, and Computer Simulations | null |
1980-01-01 | It is rare to find an experimental feature in spin glasses which is both clear-cut and unchanged over a wide variety of materials. The rather simple critical slowing-down of the spin relaxation rates which Salamon and coworkers ‘ have recently identified in the electron spin resonance data from a variety of spin glasse... | On Critical Slowing-Down in Spin Glasses | null |
1980-01-01 | Coherent approach to neutron beam polarization | null | |
1980-01-01 | Dynamics of dilute polymer solutions | null | |
1980-01-01 | The properties of ternary and quaternary rare earth-iron Laves phase intermetallic compounds have been the subject of extensive investigation in recent years, in part because for certain compositions they exhibit both very high magnetostrictive strains and relatively low magnetic anisotropy at room temperature — charac... | Magnetic Anisotropy and Spin Reorientations in Ho_xTb_1−xFe_2, Dy_xTb_1−xFe_2, and Ho_xTb_yDy_1−x−yFe_2
| null |
1980-01-01 | This paper discusses the problem of modeling the NMR correlation functions in dynamically heterogeneous (liquid-solid) systems. It is shown that the mere presence of solid surfaces causes the appearance of solidlike features in the NMR response of the liquid even if its dynamics are not directly affected by the surface... | The NMR Response of Heterogeneous Systems: Anisotropy and Low-Dimensionality Effects | null |
1980-01-01 | The generalization of the Markov property proposed by Nelson^1 as a means of reconstructing a scalar quantum field theory in Minkowski space starting from a Euclidean one has been extended by Yao^2 and Lim^3 to electromagnetic and gravitational fields. It is to be hoped that the changes resulting from the use of Euclid... | Free Euclidean Markov Fields of Integer Spin in the Landau Gauge | null |
1980-01-01 | In the framework of the recently^1 formulated Poincaré gauge field theory of gravitation we study the limit of macroscopic spinless matter modelled by a scalar matter field ϕ. We define local active Poincaré transformations for scalar matter and the corresponding invariance. We derive a Yang-Mills-type tetrad field equ... | The Macroscopic Limit of the Poincaré Gauge Field Theory of Gravitation | null |
1980-01-01 | Neutron and X-ray small-angle scattering have provided extensive structural studies of micellar systems in recent years. Neutron spin-echo now provides a tool to complement these studies with dynamic time-domain measurements. We discuss the use of this technique and present some first results. | Dynamics of micelle solutions | null |
1980-01-01 | The heisenberg-Ising chain at zero temperature | null | |
1980-01-01 | Cellular membranes are oriented, two-dimensional systems composed of heterogeneous mixtures of lipids and proteins. The most commonly accepted structure of a cellular membrane, the fluid mosaic model of Singer & Nicholson (1972), is a lipid bilayer, with some protein molecules partially embedded and some transversing t... | Membrane Lipids and the Control of Endocytosis | null |
1980-01-01 | Recently the first direct experimental evidence of solitons in the one-dimensional (I-D) ferromagnetic chain system CsNiF_3 with easy plane anisotropy was reported by Kjems and Steiner [1]. They observed a quasi-elastic component in the dynamic structure factor which was interpreted within the theoretical framework dev... | Q-Dependence of the Soliton Response in CsNiF_3 at T = 10K and H = 5 kg | null |
1980-01-01 | Solitons and magnons in the classical heisenberg chain | null | |
1980-01-01 | The last two decades were a period of luxuriant growth in the X-Ray Crystallography of biological macromolecules that has led to remarkably detailed correlations between their structure and function (1). A particularly outstanding example is the elegant work of Perutz and his colleagues on the structure of hemoglobins ... | Architecture and Dynamics of Isotopically Labelled Macromolecules by Nuclear Magnetic Resonance Spectroscopy | null |
1980-01-01 | Introduction to papers presented at the gauge theory session | null | |
1980-01-01 | The utilization of high resolution spectroscopic techniques in the investigation of photosynthetic systems has become an increasingly useful approach for the understanding of the photophysics of photosynthesis [1]. Laser techniques have afforded both narrow band excitation and short-time phenomena to be investigated in... | Optical-Microwave Double Resonance Spectroscopy of in Vivo Chlorophyll | null |
1980-01-01 | Thermal equilibrium and correlation inequalities | null | |
1980-01-01 | Nuclear magnetic resonance studies on some physisorbed systems showing both B.E.T. type I and type III adsorption isotherms have two classes of behaviour in the structure and dynamics of the adsorbate. The main systems studied were ammonia on graphite, neopentane on graphite and water on silver iodide. Results are comp... | Nuclear Magnetic Resonance from Physisorbed Molecules at the Gas-Solid Interface | null |
1980-01-01 | Thermal diffuse scattering (TDS) is inelastic scattering arising mainly from acoustic phonons and which contaminates the purely elastic Bragg or purely elastic diffuse scattering when intensities are measured by standard diffraction methods. Corrections for the effect of TDS are classically done by more or less approxi... | Separation of thermal diffuse scattering by NSE in diffraction studies | null |
1980-01-01 | The μSR technique using polarized positive muons in a magnetic field transverse to the muon spin direction has become an important method for studying kinetic and structural isotope effects as well as certain aspects of radiation chemistry. The standard experimental set-up is used to detect the three different classes ... | Free Radicals in Muonium Chemistry | null |
1980-01-01 | A natural extension of the weak equivalence principle to the Riemann-Cartan geometry is proposed and then shown to be violated by the classical equations of translational and spin motion derived from the Dirac equation. This classical limit is obtained by a purely algebraic method. We point out that it is possible to d... | Quasiclassical Limit of the Dirac Equation and the Equivalence Principle in the Riemann-Cartan Geometry | null |
1980-01-01 | Conclusion : Critical points and future progress | null | |
1980-01-01 | One observes that fermions appear in fundamental strong electromagnetic and weak interactions in some towers $$\psi = \left( {\begin{array}{*{20}{c}} {{\psi _1}} \\ \vdots \\ {{\psi _n}} \end{array}} \right)$$ where ψ _k, k = 1, ..., n are Dirac spinors. This is the case of the nucleon tower for Yukawa interactions, th... | On Dynamical Symmetries in Relativistic Field Theories | null |
1980-01-01 | Spin-dependent charge transfer collisions and spin exchange collisions have been studied for ion-atom systems. The measurements were carried out using a radiofrequency quadrupole ion trap and an atomic beam apparatus. The polarization of the collision partners was changed by radiofrequency and optical pumping technique... | Spin Polarization in Ion-Atom Collisions Studied with Ion Storage Techniques | null |
1980-01-01 | The invariant operators of the Euclidean group E(3) and its chains of subgroups E(3)⊃0(3)⊃O(2) and E (3)⊃E(2)XT_⊥⊃O(2)xT_⊥provide bases of eigenfunctions for the construction of generalized Gal ilei invariant partial wave expansions of the scattering amplitude for non-relativistic collisions between particles of arbitr... | Generalized Galilei invariant partial wave expansions of the scattering amplitude for collisions between two particles with arbitrary spin | null |
1980-01-01 | It is now well established that damage to the retina occurs from visible light at intensity levels below thresholds for thermal burns (1–3). This damage is found to be reversible in the early stages provided the pigment epithelium is intact (4). The mechanism for producing this early reversible light damage is still un... |
In Vitro Effects of Light on the Regeneration of Rhodopsin | null |
1980-01-01 | In these lectures we shall develop basically the theme that the ground state electron density $$\rho \left(\underset{\tilde{\ }}{\mathop{r}}\, \right)$$ has a truly major role to play in the many-electron description orsolids. Following the pioneering work of Thomas (1926) and Fermi (1928), in which the electronic prop... | Charge and Spin Densities in Solids | null |
1980-01-01 | Canonical (possibly Lagrangian) realizations of the Poincare' group with increasing mass-spin trajectories | null | |
1980-01-01 | The Poincaré (inhomogeneous Lorentz) group underlies special relativity. In these lectures a consistent formalism is developed allowing an appropriate gauging of the Poincaré group. The physical laws are formulated in terms of points, orthonormal tetrad frames, and components of the matter fields with respect to these ... | Four Lectures on Poincaré Gauge Field Theory | null |
1980-01-01 | A variety of spar-wingskin joint concepts have been investigated to optimize out-of-plane strength while still providing low weight and ease of fabrication. The spar-wingskin configuration consists of a thin spar which overlaps and is co-cured perpendicular to a thick wingskin. Investigation parameters were the joint g... | Design of the Spar-Wingskin Joint | null |
1979-12-01 | The remarkable remanence effects observed in spin glasses are discussed. Some theoretical approaches and results are reviewed. | Slow relaxation in spin glasses | null |
1979-12-01 | A long post-reproductive period in females under optimal conditions is common among phytoseiid mites which are specialized predators of Tetranychus -species. The resulting long life span provides the possibility to postpone or delay egg production during periods of prey scarcity, theoretically in both virgin and fertil... | The profit of senescence in phytoseiid mites | null |
1979-12-01 | Concentrations of Cd, Cr, Cu, Fe, Mg, Mn, Pb, Zn, Ca and K were examined in tissues of the troglobitic (obligatory cave-dwelling) crayfish Orconectes australis australis and troglophilic (facultative cave-dwelling) species Cambarus tenebrosus . These two species cohabit a stream in Merrybranch Cave, located in rural Wh... | Tissue metal concentrations in two crayfish species cohabiting a tennessee cave stream | null |
1979-09-01 | We investigate all finite-component invariant wave equations (− iβ ^µ∂_µ + κ)ψ=0 that have a complete set of solutions describing massive particles. We discuss a practical method for the computation of the mass spectrum, an appropriate scalar product and adjoint wave function (defined without a hermitizing matrix), and... | Consistent wave equations for families of massive particles with any spin | null |
1979-08-01 | A generalization of the Leggett-Takagi theory of NMR is presented in the case when the order parameter in the equilibrium is space dependent. The equations of spin dynamics are solved and the frequencies and damping in the cases of specular and diffuse scattering of quasiparticles from the plane wall are found. It is s... | Surface spin waves in the superfluid A phase of ^3He | null |
1979-08-01 | Critical dynamics of an impurity spin in the Heisenberg ferromagnet below T_
C
| null | |
1979-06-01 | The thermal conductivity of a cooperative T −( e+t ) Jahn-Teller system with dominating e coupling is considered and the pseudo spin thermal conductivity is evaluated. A simple cubic crystal is considered, where each Jahn-Teller ion has an octahedral surrounding. Using the correlation function method of Kubo, and the h... | Transport in cooperativeT−(e+t) Jahn-Teller systems | null |
1979-05-01 | ^13C- and water proton-nuclear magnetic relaxation times were measured as functions of temperature and pH to study the interaction of Cu(II) with poly( D -glutamic acid) (PGA) in aqueous solution. In the pH region from 4.5 to 8, the addition of Cu(II) significantly influences the relaxation times of C_γ and C_δ carbons... | ^13C- and Water Proton-Nuclear Magnetic Relaxation of Cu(II)–Poly(D-glutamic acid) Complex in Aqueous Solution | null |
1979-04-01 | The molecular conformation and dynamics of poly( D -glutamic acid) in aqueous solution were studied by ^13C nuclear magnetic resonance spectroscopy. Chemical shift, spin—lattice relaxation time ( T _1), spin—spin relaxation time ( T _2), and the nuclear Overhauser enhancement (NOE) were measured as functions of pH at 3... | ^13C Nuclear Magnetic Relaxation of Poly(D-glutamic acid) in Aqueous Solution | null |
1979-04-01 | An exact solution of the equation for spin waves propagating along the normal to the domain wall is derived for a ferromagnet with a 180° domain wall moving at constant speed, and the radiation of spin waves in rf fields is investigated. | Spin waves in a ferromagnet with a moving domain wall | null |
1979-04-01 | The guiding idea of this work is that classical diffusion theory, being nonrelativistic, should be associated with nonrelativistic quantum mechanics. A study of classical diffusion leads to a generalization which should correspond to the relativistic domain. Actually, with a convenient choice of the basic constants, on... | A stochastic basis for microphysics | null |
1979-03-01 | Critical dynamics of an impurity spin in a perromagnet above T_
C
| null | |
1979-03-01 | The possibility of obtaining spin glasses by addition of impurities in an antiferromagnetic insulator is examined. Dipolar interactions are briefly considered but the attention is focussed on Heisenberg systems. Equivalence with the Edwards-Anderson model is derived in a theoretical case. Experimental realisations, suc... | Insulating spin glasses | null |
1979-03-01 | In this paper, applications of the Monte Carlo technique to estimate the static and dynamic properties of model spin systems are discussed. Finite-size effects and choice of boundary conditions in simulating different types of real systems are outlined. Various applications of the Monte Carlo simulations to one-, two- ... | Monte Carlo simulation of model spin systems | null |
1979-01-01 | The contributions of dipolar and exchange spin-spin interactions to the ESR linewidth of dilute solutions of poly-4-vinylpyridine with large amount of spin labels on macromolecules are evaluated. The segmental local density and segmental, translational mobility in isolated macromolecules are determined. The influence o... | Molecular Dynamics of Polymers and Polymer Solutions as Studied by Spin Probe and Spin Label Methods: Evaluations of the Dipolar and Exchange Interactions, Influence of Pressure, Rotational, Anisotropy | null |
1979-01-01 | Nuclear relaxation in ID conductors | null | |
1979-01-01 | Chemical shifts of ^27A1, ^69,71Ga NMR signals and spin coupling constants Al-N, Ga-N for complexes [MX_4−n(NCS)_n]^− and [MX_4−n(NCO)_n]^−(M=A1, Ga; X=C1, Br, I; n=0−3) are reported. The resonance multiplicity is unambiguous proof of the coordination of NCS^− and NCO^− ions through the nitrogen atom. | Spin Coupling Constants ^27A1-^14N and ^71Ga-^14N | null |
1979-01-01 | A new approach based on the measurements of the water protons relaxation time T_1 in spin-labelled protein preparations is suggested for the bound water local viscosity investigations. The correlation between the protein conformational state changes induced by different actions and the physicochemical properties of loc... | A New Approach to the Determination of Local Physicochemical Properties of Biomacromolecules Solvate Surrounding Using Magnetic Relaxation Method | null |
1979-01-01 | The dynamics of two types of low-dimensional magnetic systems will be discussed. First of all the nuclear relaxation in an isotropic antiferromagnetic linear chain (A.L.C.) with spin S = 1/2 will be discussed. As an example the A.L.C. system in CuSeO_4.5H_2O will be given. Secondly an even lower dimensional system, tha... | Spin Dynamics of Low-Dimensional Systems | null |
1979-01-01 | In order to study the dynamics of the electrons, R.M.N. (T_1) and dynamic nuclear polarization were performed; the electronic diffusion coefficient was deduced. It may be concluded that the electrons have a behaviour of localized electrons below 200 K and of non localized electrons at high temperature. | Proton Spin Lattice Relaxation in DIPΦ_4-TCNQ | null |
1979-01-01 | Spin dynamics in a coupled four spin system of the AA’BB’ type are described. Experimental temperature dependence of the longitudinal relaxation time of axial and equatorial methylene protons (H_A and H_B) have been studied in 2,2-dimethyl-propanediol-1,3-sulfite. It is shown that spin--rotation interaction contributes... | Stereospecificity of Selective Proton Relaxation Times in Rigid Organic Molecules | null |
1979-01-01 | The increase of the proton spin relaxation rates by optically excited triplet states in molecular crystals is demonstrated on 1,2,4,5-Tetrachlorobenzene (TCB). The crystal structure of TCB favors a one dimensional exciton motion which is expected to be coherent at low temperatures. | Triplet Exciton Dynamics cn TCB by Proton Spin Relaxation | null |
1979-01-01 | The uniform relaxation rate for H=0 in 2-dim. Cu(C_nH_2n+1NH_3)_2Cl_4 (n=1,2) and 3-dim. CuX_2Br_4.2H_2O (X=Rb,NH_4) has been measured from T_c-room temperature and compared with theory in the oritical region.The agreement is satisfactory if antisymmetric exchange is included. Comparison of (x.e^−1 T)_critical vs. ε fo... | Critical and High-Temperature Spin Dynamics in Two 3-D and Two 2-D Ferromagnets | null |
1979-01-01 | Systems with quenched random impurities, an overview of dynamics, replicas and frustration approaches | null | |
1979-01-01 | On the basis of a solution of Bloch equation for a coupled heteronuclear spin system it has been shown that transient disturbance of one kind of nuclei results on nutational oscillations of spin vector components of the other kind of nuclei. The parameters of such nutations are determined by the relaxation properties o... | Transient Nutations in Heteronuclear Spin Systems | null |
1979-01-01 | Correlation times of ESR spin probes in the interior of aqueous dextran gel microbeads show a bi-functional increase with increasing cross-linking. They are much greater for the highly cross-linked gels and may reflect interactions between the probe and the three dimensional gel structure. | A Spin Probe Study of Cross-Linked Dextran Gels in Aqueous Media as a Model for Cell Walls | null |
1979-01-01 | The paper shows how one can obtain extensive quantitative data about the dynamics of the intramolecular motion as well as the spatial structure of the molecules containing two paramagnetic nitroxide centers. | Interpretation of the ESR Spectra of Nitroxide Biradicals in Liquid and Solid Solutions | null |
1979-01-01 | Photo-CIDNP has been observed in the amino acids tyrosine, histidine, and tryptophan and in proteins. Polarization of CIDNP enhanced NMR lines may be transferred to other lines as a result of dipolar cross-relaxation. For proteins the sign of the transferred polarization is opposite to that observed for the amino acids... | Laser Photo-CIDNP in Proteins: The Effect of Dipolar Cross-Relaxation | null |
1979-01-01 | NMR ^1H, ^13C, ^31P parameters as well as lantanide induced chemical shifts and changes in coupling constants have been determined for a variety of fourcoordinated phosphorus compounds. The variations of NMR parameters were partially attributed to the contribution of phosphorus 3d orbitals in transmission of spin infor... | Mono- and Multifrequency Resonances ^1H, ^13C, ^31P and Lantanide Shifts of Fourcoordinated Phosphorus Compounds | null |
1979-01-01 | Effects of spin-orbital interactions on magnetic shielding and spin-rotation interaction of nuclei in molecules are considered. Numerical results are obtained for hydrogen halides. A general formula for nuclear spin-rotation interaction in oscillating molecule is derived. A corrected numerical value for proton magnetic... | Effect of the Spin-Orbital Interaction on the Nuclear Magnetic Shielding in Molecules | null |
1979-01-01 | A nuclear spin polarimeter operating at ion energies in the keV region is described. The principle is based on the relation between the populations of the hyperfine substate of the 2S_1/2 metastable state and the spin polarization of the nuclei, protons or deuterons, of these metastable atoms. | Nuclear Spin Polarimeter via the Lamb-Shift | null |
1979-01-01 | Anisotropic rotational diffusion is encountered in most studies on biological systems. Thus, in parallel with various biomedical applications, we have developed the theory for analyzing the ST-EPR response for a molecule undergoing general anisotropic diffusion in an arbitrary potential field. | Saturation Transfer Spectroscopy: A Progress Report on Theoretical Advances and Selected Biomedical Applications | null |
1979-01-01 | In Fourier Transform Multiple Quantum NMR [1] multiple quantum transitions in a coupled spin system are excited and detected in such a way that a specific n-quantum spectrum can be obtained for each n where n = 0, 1, ..., N (N = number of coupled spin-1/2 nuclei). Several of our recent developments and applications in ... | Fourier Transform Multiple Quantum NMR | null |
1979-01-01 | Minima of T_1 at −100°C and 0°C and T_1 limit for protein protons at increasing of concentration or viscosity of solution or protein molecular weight and considerable dispersion in T_1 values higher and lower frequencies of globule rotation in solutions and T_1 minimum at −100°C in protein powders were observed that du... | Study of Internal Motions in Globular Proteins by Temperature and Frequencies Dependencies of Protein Protons T_1
| null |
1979-01-01 | PMR, ESR and Raman spectroscopy methods were used to study both micelle formation of aqueous solutions of dimethyldecylphosphinoxid (M) and its interaction with iminoxid radical-2,2,6,6-tetramethylpiperidine-1-oxim. Kinetic and thermodynamic parameters of the processes studied as well as configuration of the methylene ... | Study of Micelle Formation of Surfactants by Spin Probe Method | null |
1979-01-01 | Long-range distance between functional groups and slow translational diffusion of macromolecules can be determined by the methods of spin-and fluorescence labels measuring the rate of slow relaxation processes (the rate of spin-lattice relaxation 1/T_1, for spin labels and the rate of desactivation of triplet-exited mo... | The Use of Spin-Spin Interactions in Investigation of Biological and Model Systems | null |
1979-01-01 | A modification of the pulsed field gradient (PFG) technique is described, which is advantageous for measuring diffusion coefficients in the presence of large static background magnetic field gradients in finely powdered samples. | A Modified Pulsed Gradient Technique For Measuring Diffusion in Powdered Samples | null |
1979-01-01 | The H^1-N^15 double resonance rates in powders of NH_4NO_3 and (NH_4)_2SO were investigated as a function of the rotating field H_1 magnituae and N^15 spins concentration, The cross-relaxation dynamics at the sites of NH _4 ^+ and NO _2 ^− groups in NH_4NO_3 were investigated separately by selective enrichment. The cro... | H^1-N^15 Double Resonance Cross Relaxation in Solids NH_4NO_3 and (NH_4)_2SO_4
| null |
1979-01-01 | For series of compounds of miscellaneous structural types linear relations exist between the squares of averaged MH stretching frequencies (V_MH) and the field gradients at deuteron (q_D) or the geminai spin coupling constants (^2J_CH’ ^2J_HH). These relations provide the basis to suppose that the qualitative M0 theori... | Correlations between Stretching Frequencies and Some NQR- or NMR-Quantities Depending on the Properties of Electron Shell around the Hydrogen Nucleus | null |
1979-01-01 | The possibility of studying nitroxyl spin label molecular rotations with correlation times over the range 10^−4-10^−7sec by use of conventional ESR absorption signals under microwave saturation and Zeeman modulation was analyzed both theoretically and experimentally (in application to nitroxyl radicals and spin labelle... | Spin Label Study of Slow Molecular Rotations by Use of ESR Saturations Effects | null |
1979-01-01 | Rotational mobility ( τ _c) of spin labels in the sites of Met 65, Tyr 74 and one of the Lys residues 72 or 73 of ferri-Cyt C has been studied. It is shown that displacement of Met 80 from the ligand position of the home by cyanide-ion sharply changes the mobility of all three labels. However, no significant change in ... | ESR Studies of Conformational Changes in Cytochrome C | null |
1979-01-01 | A stopped-flow apparatus for biological applications was developed and adapted to an ESR spectrometer. Kinetics of free radicals as well as kinetics of conformational changes of spin-labelled biopolymers are observable with a time resolution of 4 milliseconds. | Time Resolved ESR Spectroscopy Using a Stopped-Flow Technique | null |
1979-01-01 | ^13C NMR spectra of selectively enriched glucose, glutamic acid, aspartic acid, alanine, uridine and guanosine, synthesized by the photosynthetic bacteria Chlorobium thiosulfatophilum were studied. Several ^13C-^13C spin-spin coupling constants were measured in the tightly coupled systems. Labelling patterns of the com... | Study of the Metabolism of the Photosynthetic Bacteria Chlorobium Thiosulfatophilum by ^13C NMR | null |
1979-01-01 | The advantages of masers based on the atom hyperfine transfers for these atoms bimolecular chemical processes (reversible as well) studies have been experimentally demonstrated with the example of hydrogen maser and hydrogen atoms. Rate constants and the lifetimes of intermediate complexes can be measured by the maser ... | The Use of the Maser for Kinetics and Mechanism of Elementary Atomic-Molecular Chemical Processes Studies | null |
1979-01-01 | The binuclear oxygen-bridged iron/III/ complexes of some Schiff bases deriving from salicylaldehyde and various amines have been investigated by the magnetic susceptibility measurements of powder samples and by the PMR technique in deuterochloroform solutions. The temperature dependencies of the magnetic susceptibility... | The PMR and Magnetic Susceptibility Studies on Some Binuclear Oxygen-Bridged Iron/III/ Complexes of Schiff Bases | null |
1979-01-01 | ESR spectra of a spin probe in the K range | null | |
1979-01-01 | The NMR investigations of poliovirus HEp-2 cell interaction and of microorganisms grown on various substrates display a helpful relation between cell water proton T_1 and the conformational state of macromolecular cell constituents. | Dependence of Cell Water T_1 on Culture Medium and on Virus-Induced Alterations | null |
1979-01-01 | Complete assignment of the aromatic proton and CF_3 fluorine signals and partial assignment of the CH_3, C^αH and Lit proton signals has been made in the PER spectra of neurotoxin II and a number of its trifluoroacetylated derivatives. A study of the pH dependence of the signals, of the nuclear Overhauser effects, and ... | NMR Studies of Neurotoxin II Spatial Structure | null |
1979-01-01 | An introductory background lecture on symmetry and spin restrictions and quantum chemical computational techniques for potential energy surfaces of ion-molecule reactions was presented by Joyce J. Kaufman. Symmetry restrictions for both. L-S and j-j coupling were outlined and the concept she had previously introduced o... | Potential Energy Surfaces for Ion-Molecule Reactions: Summary of the Panel Discussion | null |
1979-01-01 | In the broadest sense, modulation effects can be considered to represent those perturbations or influences on spectroscopic line shapes that arise either (1) from applied coherent (frequency, amplitude, or phase) modulation of the electromagnetic radiation incident upon the sample or modulation of the energy levels (re... | Modulation Effects in Multiple Electron Resonance Spectroscopy | null |
1979-01-01 | The net CIDNP hap been found for short-lived radical pairs (RP) with any number and spin of magnetic nuclei. CIDEP effects in radicals have been calculated for RP with one nucleus. | CIDNP and CIDEP in Low Magnetic Fields | null |
1979-01-01 | Nuclear spin interactions H transforming as second-rank tensors in spatial coordinates q have the property. that they may be replaced by <m:math display='block'> <m:mrow> <m:mfrac> <m:mn>1</m:mn> <m:mn>3</m:mn> </m:mfrac> <m:mi>T</m:mi><m:msub> <m:mi>r</m:mi> <m:mi>q</m:mi> </m:msub> <m:mi>H</m:mi> </m:mrow> </m:math> ... | Locally Static Spin Interaction in Rotating Samples | null |
1979-01-01 | Effect of trapping on μ^+ spin depolarization in solids | null | |
1979-01-01 | A method of reaction yield detected magnetic resonance is used to study short-lived (10^−9s) intermediates in photoreactions in organic crystals. The method is based on a new phenomenon consisting in a change of the rate of reactions involving pairs of paramagnetic particles under the effect of a resonant microwave mag... | The Reaction Yield Detected Magnetic Resonance of Intermediate Complexes | null |
1979-01-01 | The coupled motion of localized and conduction-electron magnetic moments in dilute magnetic alloys at low temperatures (KT ≤ ω_ s, ω ,resonant, external frequencies) is studied.The field, frequency and temperature dependencies of the kinetic coefficients which stand for the magnetic relaxation rates and the shifts of t... | Theory of Electron Spin Resonance in Dilute Magnetic Alloys at Low Temperatures | null |
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