Results 251 to 260 of about 920,691 (290)

NMR Solvent Spin‐Lattice Relaxation Rate in Colostrum

Spectroscopy Letters, 2005
Abstract In this study, by using a FT‐NMR spectrometer operating at 60 MHz for proton, the solvent spin‐lattice relaxation times (T 1) in colostrum were measured versus the days of lactation, whereas the T 1 values in dehydrated colostrum were determined versus concentration of its hydrating solid. Data show that the spin‐lattice relaxation rate (1/T 1
Budak, H, Yilmaz, A
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Reduction and destruction rates of nitroxide spin probes

Archives of Biochemistry and Biophysics, 1987
A series of nitroxides was tested for rates of one-electron reduction in a chemical, a photochemical, and two biological systems by ESR assays. In all cases, piperidine and hydropyridine nitroxides were reduced consistently more rapidly than pyrroline and pyrrolidine nitroxides. Substituents on the nitroxides also affected reduction rates, although not
S, Belkin, R J, Mehlhorn, K, Hideg, O, Hankovsky, L, Packer   +4 more
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Potential Energy Surfaces and Rates of Spin Transitions

Zeitschrift für Physikalische Chemie, 2013
The stability of magnetic states and the mechanism for magnetic transitions can be analyzed in terms of the shape of the energy surface, which gives the energy as a function of the angles determining the orientation of the magnetic moments. Minima on the energy surface correspond to stable or metastable magnetic states and can represent parallel ...
Bessarab, Pavel F., Uzdin, Valery M., Jónsson, Hannes   +3 more
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The spin-spin relaxation rate of paramagnetic impurities in antiferromagnets

Solid State Communications, 1982
Abstract The interaction between paramagnetic impurities in easy plane type antiferromagnets at finite temperatures is considered. In the framework of the diagram spin-operator technique the spin-spin relaxation rate Γ of paramagnetic impurities is investigated.
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Spin conversion rates in solid CH4Kr mixtures

Physics Letters A, 1983
Abstract Spin conversion rates in solid CH4Kr mixtures have been measured at Kr concentrations up to 33% and 0 ...
CALVANI, Paolo, DE LUCA, Francesco, MARAVIGLIA, Bruno   +2 more
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Chaotic spin exchange: Is the spin non-flip rate observable?

Hyperfine Interactions, 1994
If spin exchange is of the Poisson nature, that is, if the time distribution of collisions obeys an exponential distribution functionand the collision process is random, the muon spin depolarization is determined only by the spin flip rate regardless of the spin non-flip rate.
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Spin rate variations of spin-stabilized apogee motors in thrust phase

Journal of Guidance, Control, and Dynamics, 1988
Nomenclature CF = skin-friction coefficient Is = roll moment of inertia of solid Is = rate of change of 75 k = exit plane radius of gyration for roll L nozzle length m = mass flow rate r = radial distance rc = radius of forced vortex core R nozzle radius at a given section T = torque Va = axial velocity Vt = tangential velocity x = axial coordinate d>/
V. Adimurthy, Pradeep Kumar, S. Lakshminarayanan   +2 more
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Damping rate for hydrodynamic spin waves

Journal of Magnetism and Magnetic Materials, 1998
Abstract A microscopic theory of hydrodynamic spin waves in an isotropic Heisenberg ferromagnet at T T C ( T C – Curie temperature) was recently developed by the author. One of the new results of this theory is that the exchange interaction does not contribute to the damping rate of hydrodynamic spin waves.
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Spin fluctuation rates from Mössbauer spectra of high-spin ferrous rubredoxin

Physics Letters A, 1979
Abstract Spin fluctuation rates deduced from 57 Fe Mossbauer spectra of the iron protein rubredoxin in applied fields between 10 K and 150 K are reproduced by a one-parameter model based on the direct process using Blume's stochastic theory of line shape.
H. Winkler, C. Schulz, P.G. Debrunner
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Calculation of nuclear-spin-relaxation rate for spin-polarized atomic hydrogen

Physical Review B, 1983
Approximations introduced in previous calculations of spin relaxation for spin-polarized atomic hydrogen are investigated by carrying out a more exact coupled-channel calculation. With the exception of the high-temperature approximation, the approximations turn out to be justified up to the ${10}^{\ensuremath{-}3}$ level of accuracy.
R. M. C. Ahn, J. P. H. W. v. d. Eijnde, B. J. Verhaar   +2 more
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