Materials Literature
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One of the major problems associated with the use of substituted benzylideneaniline type liquid crystals is their relative instability to cleavage or reaction of the anil linkage. Many workers have noted the presence of ubiquitous impurities in these materials which influence the reproducibility of the phase transitio…
Abstract Ionic conduction in polymer films is of two types. Inverse conduction, I , occurs when the resistance runs counter to that of the external solution, and Direct conduction, D , when the resistance follows that of the external solution. The distribution of areas having D properties has been established for film…
Cathodoluminescence (CL) and x-ray emission excited by an electron microprobe in In1−xAlxP at ∼300°K have been monitored simultaneously to yield conduction band structure and alloy composition, respectively. Efficient single-line CL, characteristic of direct bandgap recombination, is observed for x between 0.0 and alm…
Magnetic anisotropy, magnetization, and average magnetic susceptibility have been measured for iron (II) phthalocyanine. The anisotropy was measured from the room temperature to about 90°K, the average susceptibility from 296 to 1.57°K, and the magnetization was measured at 1.57°K for field strengths between 1100 and…
The solutions to four classical problems in dynamic plasticity—the circular plate under uniform pressure, the reinforced circular cylindrical shell under uniform pressure, the free-free beam with a central concentrated force, and the circular cylindrical shell with a ring load—are examined to determine the effect of p…
Measurements are reported of magnetization and the average magnetic susceptibility of manganese (II) phthalocyanine in the range 1.7–300°K, which confirm that the Mn(II) atom is in an S = 3 / 2 spin state, and that weak ferromagnetic interactions are present in the crystal, presumably between adjacent molecules. Singl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAromatic Polyesters with Large Cross-Planar SubstituentsP. W. MorganCite this: Macromolecules 1970, 3, 5, 536–544Publication Date (Print):September 1, 1970Publication History Published online1 May 2002Published inissue 1 September 1970https://pubs.acs.org/doi/10.1021/ma60017…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinding of copper(II) to potentially tridentate amino acid ligandsEdmond Woodrow Wilson Jr., Mary H. Kasperian, and Robert Bruce MartinCite this: J. Am. Chem. Soc. 1970, 92, 18, 5365–5372Publication Date (Print):September 1, 1970Publication History Published online1 May 2002…
Summary A brief survey is given of the physical properties of the rare earth metals. In doing this their characteristic structural and magnetic behaviour is described first and this is then followed by an examination of the ways in which these features affect the other properties.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOligomeric silsesquioxanes, (HSiO3/2)nCecil L. Frye and Ward T. CollinsCite this: J. Am. Chem. Soc. 1970, 92, 19, 5586–5588Publication Date (Print):September 1, 1970Publication History Published online1 May 2002Published inissue 1 September 1970https://pubs.acs.org/doi/10.10…
Abstract Review of literature, allogenic and authigenic clays, conditions of formation from geologic and geochemical points of view
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCollagen structure in solution. I. Kinetics of helix regeneration in single-chain gelatinsWilliam F. Harrington and N. Venkateswara RaoCite this: Biochemistry 1970, 9, 19, 3714–3724Publication Date (Print):September 15, 1970Publication History Published online1 May 2002Publi…
Theoretical predictions of crack propagation behavior in brittle solids under conditions of thermal shock were verified by water quenching of cylindrical polycrystalline alumina rods followed by strength testing. The calculated quenching temperature difference (Δ T O ) required to initiate thermal‐stress fracture agre…
Magnetic properties of the perovskite-type oxide LaMnO 3 were studied in detail, experimentally and theoretically. The properly stoichiometric LaMnO 3 had a weak ferromagnetic moment in addition to the antiferromagnetic character with a Néel temperature of 141°K. It was found to be a parasitic weak ferromagnet. These…
The paper is concerned with the structure of multiaxial stress-strain relations in time-dependent metal plasticity, as for transient creep and rate sensitive yielding. First, a general kinematical relation is developed between the macroscopic inelastic strain tensor and microstructural slip displacements, as modeled e…