Magnetic And Longitudinal Field
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. O magnetometro a Efeito Kerr e o filme fino de Co/Si
The aim of this work was to study and implement a technique for the characterization of the magnetic properties of thin films through a Kerr magnetometer (MEK). First we present the phenomenology behind the magneto-optic Kerr effect. In the sequence we present the magnetometer (MEK) and the experimental procedures applied to get hysteresis loops from the mag
Publicado em: 2002
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14. Efeito Kerr magneto-óptico espectral e sperimagnetismo de filmes amorfos de terra rara-Co / Spectral magneto-optical Kerr effect and magnetism-speri of the films of amorphous rare earth-Co
We have observed the spectral behavior of the transverse magnetooptical Kerr effect (TMOKE) in thin films of rare earth - cobalt amorphous alloys for the visible and the near-ultraviolet ranges of spectrurn (wavelength fiom 325 nm up to 670 nm). The relative change of reflectivity has shown a maximum at the blue wavelength. We have concluded that this magnet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2001
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15. Viscoelastic ferrogel: dynamic magnetic susceptibilities
Theoretical model to describe magnetodynamics of a ferrogel, i.e., an assembly of ferromagnetic nanoparticles embedded in a gel, is proposed. The reorientations of the particles are determined by the influence of the elastic matrix and the rotational Brownian motion. The set of essential parameters, on which the components of the dynamic magnetic susceptibil
Braz. J. Phys.. Publicado em: 2001-09
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16. Espectroscopia não-linear de alta resolução em I2, Ti e Ar+
In this work we performed nonlinear high-resolution spectroscopy in I2, Ti and Ar+. Iodine was used as a wavelength reference in the visible. Doppler limited spectra of this molecule were obtained, in particular by using photoacoustic detection. This one proved to be comparable to detection with photodetectors in terms of sensibility and signal-to-noise rati
Publicado em: 1994
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17. Quantitative Magnetic Resonance Techniques as Surrogate Markers of Alzheimer’s Disease
Summary: Recent advances in understanding the molecular biology of Alzheimer’s disease (AD) offer the promise of useful therapeutic intervention in the foreseeable future. Hence, improved methods for early diagnosis and noninvasive surrogates of disease severity in AD have become more imperative. Various quantitative magnetic resonance (MR) techniques that
The American Society for Experimental NeuroTherapeutics.
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18. Protein-water interaction studied by solvent 1H, 2H, and 17O magnetic relaxation.
Previous studies of the magnetic field dependence of the magnetic relaxation rate of solvent protons in protein solutions have indicated that this dependence (called relaxation dispersion) is related to the rotational Brownian motion of the solute proteins. In particular, the dispersion of the longitudinal (spin-lattice) relaxation rate 1/T1 shows a monotoni
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19. Classes of hydration sites at protein-water interfaces: the source of contrast in magnetic resonance imaging.
Immobilized protein solute, approximately 20 wt %, alters the longitudinal and transverse nuclear magnetic relaxation rates 1/T1 and 1/T2 of solvent water protons in a manner that makes their values indistinguishable from those of a typical human tissue. There is now a quantitative theory at the molecular level (S.H. Koenig and R. D. Brown III (1993) Magn. R
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20. Models of stratum corneum intercellular membranes: 2H NMR of macroscopically oriented multilayers.
Deuterium NMR was used to characterize model membrane systems approximating the composition of the intercellular lipid lamellae of mammalian stratum corneum (SC). The SC models, equimolar mixtures of ceramide:cholesterol:palmitic acid (CER:CHOL:PA) at pH 5.2, were contrasted with the sphingomyelin:CHOL:PA (SPM:CHOL:PA) system, where the SPM differs from the