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Showing 1 to 20 of 74 for “"relaxation rates"”.
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Strain-Modified Spin-Lattice Relaxation Rates in Some Rare-Earths Salts
Made available in DSpace on 2015-05-12T21:41:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6808276.PDF: 3257649 bytes, checksum: 370e59be327c25e932ed47814af79b7c (MD5) Previous issue date: 1967
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Strain-modified spin-lattice relaxation rates in some rare earth salts
… was made of the electron spin-lattice relaxation rates of Ce and Er in LaCl3 progressively strained by replacing a small fraction of the ct ions by Br and also Nd in lanthanum magnesium nitrate (LMN) similarly strained with Zn replacing Mg in order to test our proposal that …
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Measured Electron Spin Relaxation Rates in Frozen Solutions of Azurin, Vitamin-B12r, and Nitrosyl Ferrous Myoglobin
Rates in frozen glycerin/water solutions at temperatures between 1.4 K and 20 K are reported for a copper-containing protein, azurin, and a cobalt-containing biomolecular complex, vitamin B$\sb{\rm 12r}$, the paramagnetic product of the photolysis of coenzyme B$\sb $. Results are interpreted in …
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Effect of Nitroxides and Molecular Oxygen on Proton Relaxation Rates in Aqueous Systems and in Lipids
… presented. The effect of these species on proton relaxation in both aqueous systems and in lipids is studied. The basic experimental approach for this study is the measurement of proton longitudinal relaxation rates (1/T$\sb1$) over a broad range of magnetic field strengths (corresponding to …
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Measured electron spin relaxation rates in frozen solutions of azurin: Vitamin B12r and nitrosyl ferrous myoglobin
Measured electron spin-lattice relaxation rates in frozen glycerin/water solutions at temperatures from 1.4 K to 20 K are reported for a copper-containing protein, azurin, and a cobalt -containing bi omol ecul ar complex, vitamin B 12r, which is the paramagnetic product of the photolysis of …
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Magnetic Resonance Behavior and Metal-Metal Interactions in Bimetallic Complexes of Pyridylmethylketazine
This study is on the NMR proton relaxation rates and metal-metal interactions of MM$\sp\prime$(PMK)$\sb{3}$(NO)$\sb3)\sb{4}\cdot{\rm xH\sb{2}O,}$ where M and M$\sp\prime$ are Co(II), Ni(II), Cu(II), and Zn(II), and PMK (pyridylmethylketazine) is the condensation of two molecules of 2-acetylpyridine …
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Water relations of simple sugar solutions and skim milk powder as studied by nuclear magnetic resonance spectroscopy
… and $\sp1$H decoupled $\sp{17}$O NMR transverse relaxation rates (R$\sb2$). For all three nuclei, R$\sb2$ increased with increasing sugar concentration with different magnitude and different trends of increases. Comparison of $\sp1$H, $\sp2$H and $\sp{17}$O NMR R$\sb2$ relaxation rates, on a …
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Characterizing Nanoparticle Size by Dynamic Light Scattering Technique (DLS)
… a photomultiplier tube and analyzed to get the relaxation rates for decay of intensity correlations, which correspond to the diffusion constants pertaining to the motion of the particle. In the case of nanorods there are two types of motion - translational and rotational. By dis-entangling the …
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Nuclear magnetic resonance studies of the organic superconductor kappa-(bisethylenedithiotetrathiafulvalene)(2) copper(nitrogen(cyanide)(2))bromine
… dependent lineshapes, Knight shifts, spin-spin relaxation rates and spin-lattice relaxation rates for the $\sp{-1}$H and $\sp{13}$C sites located in the organic ET molecules of $\kappa$-(ET)$\sb2$CU (N(CN)$\sb2$) Br for temperatures 2 K $$ 4.3 T). We studied the orientation dependence of this …
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Measurement of Wall Relaxation Times of Polarized Helium-3 in Bulk Liquid Helium-4 for the Neutron Electric Dipole Moment Experiment
The relaxation rates extrapolated from the observed values of Pd for d-TPB, coated Torlon, and coated BeCu in the nEDM apparatus were found to be consistent with design goals.
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Electron spin-lattice relaxation in two heme iron and two blue-copper proteins at liquid helium temperatures
The relaxation rates in frozen aqueous solutions of whale ferri-myoglobin azide, bovine ferri-hemoglobin azide, cupric azurin (P. aeruginosa) and cupric spinach plastocyanin were measured at 9.5 GHz using the pulse-saturation recovery method. Measurements covered a temperature range of 1.4 K to as …
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Determining optimum imaging parameters for SWIFT: application to superparamagnetic iron oxides and magnetized objects.
… both short and long transverse and longitudinal relaxation rates. It is desirable to have equations that accurately describe the signal of spins when excited by SWIFT; however the Bloch equations are not easily solvable for the SWIFT sequence for all relaxation rates and flip angles. The purpose …
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Electron spin-lattice relaxation in YB3+ - doped silicate glass
"Relaxation rates of Yb3+ ions incorporated in low concentrations into a host silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature dependence of …
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Electron spin-lattice relaxation in ytterbium ion-doped silicate glass
"Relaxation rates of Yb$\sp{3+}$ ions incorporated in low concentrations into a host silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature …
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Microwave studies of amorphous silicon
Electron paramagnetic resonance and electron spin relaxation rates of the intrinsic paramagnetic center (g=2.0055) in amorphous silicon have been studied in the 0.3 -1.2 K temperature range. Various sample preparation techniques were used, including ion implantation, sputtering, arid vacuum …
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The magnetic properties of the cuprate superconductors
… in conflict with the measured nuclear magnetic relaxation rates. The author reports on calculations of the electron spin susceptibility for the superconducting state of Y Ba2Cu30 7 using a band structure with nearest and next nearest neighbor hopping, a momentum dependent spin-spin interaction …
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Nuclear magnetic resonance studies of yttrium barium copper oxide in the superconducting state
… and field dependent $\sp{63}$Cu(2) nuclear spin relaxation rates ($\sp{63}$W1$\alpha$) in the superconducting state.
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Spin-lattice relaxation of trivalent ytterbium and erbium in dicesium sodium yttrium hexachloride
… measured the EPR spectrums and the spin-lattice relaxation rates of trivalent Ytterbium and Erbium in the cubic host lattice Cs2NaYC16 at a microwave frequency of 16.5 GHz and between the temperatures 1.5 and 12 K in order to test several models of the orbit-lattice interaction. We have found …
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Molecular structure, dynamics and hydration studies of soybean storage proteins and model systems by nuclear magnetic resonance
… were well resolved and tentatively assigned. Relaxation measurements indicated fast motion for several side chains and the protein backbone. Protein fractions (11S and 7S) were also investigated at various states of molecular association. The large size of the multisubunit soybean storage …
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Target-specific contrast agents for magnetic resonance microscopy
… MR contrast agents to regionally alter relaxation rates, resulting in increased contrast in ex vivo MRM of the human brain, with the aim of providing richer information about cyto- and/or myelo-architechtonics than is currently achievable. To accomplish this goal, a traditional optical …
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