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Structural studies on hydrogen bonding in segmented polyurethane-urea elastomers were made using IR spectroscopy. Further, the orientation behavior of both the hard and soft segments on deformation was investigated using IR dichroism measurements. Hydrogen bonding was found to be formed not only between the hard segme…
Lysyl oxidase catalyzes the formation of crosslinking aldehydes in collagen and elastin. This report demonstrates that the enzyme has high activity with collagen precipitated as native fibrils, an apparent K(m) of 0.95 muM, and low activity toward either soluble forms such as denatured collagen, isolated alpha chain,…
Bauschinger data for dispersion-strengthened single crystals are given, and correlated with data on the dislocation microstructure and the softening effect which is prominent at room temperature in copper. The data are analysed in terms of theories presented in earlier papers, and the following conclusions have been r…
Lipid/water partition coefficients of 19 radiolabeled drugs were correlated with uptake by brain during a single microcirculatory passage following carotid arterial injection. Uptake was measured relative to a simultaneously injected diffusible reference. When the lipid/ water partition coefficient was greater than ab…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic interactions in molecules and an analysis of molecular electronic charge distribution from magnetic parametersW. H. FlygareCite this: Chem. Rev. 1974, 74, 6, 653–687Publication Date (Print):December 1, 1974Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of the glass transition temperature on heating and cooling rateCornelius T. Moynihan, Allan J. Easteal, James Wilder, and Joseph TuckerCite this: J. Phys. Chem. 1974, 78, 26, 2673–2677Publication Date (Print):December 19, 1974Publication History Published online16…
The equations of motion of a 180° domain wall in an infinite uniaxially anisotropic medium which is exposed to an instantaneously applied uniform dc magnetic field H0 have been integrated numerically. Below the critical field Hc =2παM0 (α is the Gilbert loss parameter and M0 the saturation magnetization), where a stea…
The mechanical behaviour of carbon-fibre-composite specimens of fibre volume fractions from 30 to 60% and various fibre orientation has been investigated experimentally for compression loading up to 200 MN m −2 and duration approximately 30 μs. A split Hopkinson pressure bar technique has been employed with an optical…
The magnitudes and signs of isotropic and anisotropic hyperfine (HF) fields and the magnitude of the electric field gradient (EFG) at the nuclei of diamagnetic Ga3+ ions in tetrahedral sites of lithium ferrite gallates Li0.5Fe2.5−xGaxO4 (0.01 ≦ x ≦ 0.65) have been determined from the analysis of low temperature Ga69.7…
The dielectric relaxation of CsBr and CsI containing impurities such as Pb++ and Cd++ has been investigated, using the dielectric loss method. The activation energy E, required for the migration of a cation vacancy, obtained from de conductivity measurements is in good agreement with that resulting from the dielectric…
The ESR study of V4+ in amorphous V2O5 shows that this ion is in a site having a strong axial anisotropy. The parameters of the spin Hamiltonian describing the spectra are g∥ = 1.926, A = 190 × 10−4 cm−1, g⟂ = 1.984, and B = 73×10−4 cm−1. A comparison with the ESR spectra of V4+ in V2O5 single crystals shows that shor…