The nuclear quadrupole resonance (NQR) spectrum of strontium doped La2CuO4 surprisingly resembles the NQR spectrum of La2CuO4 doped with excess oxygen, both spectra being dominated by a main peak and one principal satellite peak at similar frequencies. Using first-principles cluster calculations this is investigated here by calculating the electric field gradient (EFG) at the central copper sit...

The nuclear quadrupole moment for (197)Au has been determined on the base of the state-of-art relativistic molecular calculations. The experimental shifts in the nuclear coupling constants in the series of molecules AuF, XeAuF, KrAuF, ArAuF, (OC)AuF, and AuH have been combined with highly accurate determinations of the electric field gradient (EFG) at the gold nucleus, obtained by molecular rel...

We evaluated the inducibility of nitrate-dependent Fe(II)-EDTA oxidation (NDFO) in non-growth, chloramphenicol-amended, resting-cell suspensions of Dechloromonas sp. strain UWNR4 and Acidovorax sp. strain 2AN. Cells previously incubated with Fe(II)-EDTA oxidized ca. 6-fold more Fe(II)-EDTA than cells previously incubated with Fe(III)-EDTA. This is the first report of induction of NDFO by Fe(II).

The electric-field gradient (EFG) at nuclei in solids is a sensitive probe of the charge distribution. Experimental data, which previously only existed insulators, have been available for metals with development nuclear measuring techniques since about 1970. An early, systematic investigation temperature dependence EFG metals, originally based on results Cd, but then also extended to various ot...

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The aim of this study was to verify the association between the epidermal growth factor (EGF) +61 G/A polymorphism and the susceptibility to endometriosis using a case-control design study. The control group included fertile women without endometriosis and the case group included endometriosis patients. Polymerase chain reaction-restriction fragment length polymorphism analysis was used to geno...

A theory of the quadrupolar relaxation rate, R q , for ideal liquid binary metallic mixtures is presented. The theory predicts cancellation after a few tenths o f a picosecond o f the two and three particle correlation terms in the fluctuation o f the electric field gradient (EFG) for pure metals, and prevailing o f the three particle term for binary mixtures. This is due to the high symmetry i...

We investigate the 105K structural phase transition in SrTiO3 using depth controlled measurements of the spin relaxation of Li. The measurements were performed in zero external magnetic field and rely on the local electric field gradient (EFG) at the crystalline implantation site of the Li (I = 2) to hold the nuclear polarization. The tetragonal distortion accompanying the phase transition modi...

By single crystal C1-NQR Zeeman spectroscopy, the five independent C1 nuclear quadrupole coupling tensors in a-parachloral, (Cl3CCHO)3, have been studied at 24 ± 2 °C. The directions of the electric field gradient (EFG) tensor components have been determined. The principal axes are within ± 0.8° parallel to the C-Cl bond directions found by X-ray diffraction. Very small asymmetry parameters in ...