Materials Literature
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Low-temperature thermal conductivity and time-dependent specific heat have been measured on mixed crystals of ${\mathrm{Rb}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$(${\mathrm{NH}}_{4}$${)}_{\mathit{z}}$${\mathrm{H}}_{2}$${\mathrm{PO}}_{4}$ (x=0.35,0.72), in the composition range in which an electric dipole glass state f…
This paper describes the preparation and properties of novel heat- resistant, isocyanate-based polymers. Poly(urethane-oxazolidones) (1/1 molar ratio) were prepared by reaction of NCO-terminated urethane prepolymers with polyepoxides. Poly(urethane-oxazolidone-isocyanurates) (3/3/1 molar ratio) were made by reaction o…
STM (Scanning Tunneling Microscopy) and its variants, collectively called SXM (not including electron microscopy), are being increasingly used in electronics research and industry to study and inspect semiconductor surfaces. While it is possible to obtain quite high depth resolutions, lateral spatial resolution is chi…
The effect of hydrophobic particles on foam stability was quantitatively evaluated by the parameters in the capillary model. Polystyrene particles were dispersed into an ovalbumin solution, foam then being produced by introducing air into the ovalbumin solution with polystyrene particles (OSP) through a spinneret. The…
The symmetries of a function are considered that takes as its argument an arbitrary two-dimensional Bravais lattice, represented by a 2×2 matrix. Rotating the lattice corresponds to multiplying its matrix on the right by an element of SO(2). Matrices related by left multiplication of an element of SL(2,Z) also refer t…
The biraphid pennate genus, Rhoikoneis, originally included species flexed in girdle view with a central nodule on each valve. Recently, this genus was shown to contain taxa belonging to three distinct genera: Rhoikoneis, Campylopyxis, and Rhoicosphenia. Rhoikoneis stands apart from the other two in possessing slit-li…
With few mesogenic chromone derivatives in the literature the synthesis of 7-[4′-n-alkyloxybenzoyloxy) isoflavones was carried out. The resulting homologous series was characterized by elemental analysis and spectroscopic techniques. The first four members of the series only exhibit a nematic phase. In addition to the…
We have shown in previous work that the calculation of the intrinsic ferrimagnetic (FMR) linewidth in barium ferrite on the basis of the Kasuya-LeCraw relaxation mechanism requires a knowledge of the magnon and phonon dispersion curves far from the center of the Brillouin zone. Therefore, in this article, we have calc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic depth profiling of an atomic oxygen resistant poly(carborane-siloxane) coatingD. Schwamm, J. Kulig, and M. H. LittCite this: Chem. Mater. 1991, 3, 4, 616–620Publication Date (Print):July 1, 1991Publication History Published online1 May 2002P…
Insulators on HVDC lines may be damaged by or lose their mechanical strength because of electrolytic corrosion of the metal hardware. DC exposure tests of insulators have been conducted for 20 years at the Central Research Institute of Electric Power Industry in Japan. The authors describe the results of investigation…
Results are reported of a round trial on the analysis of mohair/wool blends by scanning electron microscopy conducted under the auspices of the International Mohair Association. The identification of the fibers in a blend is based on the pronounced difference in the cuticle scale height at the distal edge for mohair a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand field of conjugated bidentate ligands parametrized by the angular overlap modelClaus E. Schaeffer and Hideo YamateraCite this: Inorg. Chem. 1991, 30, 14, 2840–2853Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Published inissue 1 Ju…
Abstract The corrosion behavior of stainless steels, titanium and copper alloys exposed to flowing Pacific Ocean water was characterized using surface analytical and electrochemical techniques. Biofilm formation on stainless steels and titanium resulted in thin films of bacteria and diatoms that did not cause signific…
It is proposed that the ‘cross-over’ of enthalpy associated with the structural relaxation of a vitreous solid can be conveniently studied by differential scanning calorimetry using thermal scans. Observations on a network structure (0·4 Na2O, 0·1 CaO, 0·05 A12O3, 0·05 SiO2, 0·4 P2O5), a linear-chain polymer (poly met…
Abstract Most residual soils occurring in the southeastern USA have formed in saprolite. Between the saprolite and the argillic horizon lies a zone that divides material undergoing pedogenesis from that undergoing geochemical processes. We examined the physical, chemical, mineralogical, and micromorphological properti…
This contribution examines the influence of nitrogen impurity on the radiation detecting properties of synthetic diamonds. The relatively low sensitivity of the commonly available synthetic diamonds, when used as dosimeters/detectors, is attributed to the presence of nitrogen. A systematic decrease of the nitrogen lev…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Gary R. Hamed; Energy Dissipation and the Fracture of Rubber Vulcanizates. Rubber Chemistry and Technology…
The intensity behavior of the specular beam in reflection high-energy electron diffraction (RHEED) from GaAs(111)B grown by molecular-beam epitaxy (MBE) is investigated for various growth and diffraction conditions. The temporal behavior during the initial growth of a buffer layer is examined at a fixed diffraction co…
The metal hexacyanometalate films, Prussian blue (PB), Ni hexacyanoferrate (NiHCF), and Cu hexacyanoferrate (CuHCF), were studied for their ability to poise the potential of an oxide‐covered metal in a stable, passive region of voltage. This requires the films to catalyze oxygen reduction, and oxygen reduction on PB f…
A mathematical model of the performance of an aluminum‐air single cell with caustic electrolyte has been developed along with an efficient solution algorithm. The model includes kinetic expressions for the cathode and anode along with the aluminum corrosion reaction. The effects of mass transfer, migration, gas evolut…