Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurther studies of the dimeric .beta.-linked "face-to-face four" porphyrin: FTF4James P. Collman, Fred C. Anson, Craig E. Barnes, C. Susana Bencosme, Thomas Geiger, Eric R. Evitt, Robert P. Kreh, Kurt Meier, and Roger B. PettmanCite this: J. Am. Chem. Soc. 1983, 105, 9, 2694…
Fundamental and applied works involving the electrochemical utilization of metal hydrides are reviewed. In the first part of the paper, studies that investigated metal hydrides for hydrogen storage in nickel hydrogen batteries are reviewed. These studies showed that use of hydrides lowered the operating pressures in n…
The electrical properties of Au/PcZn/M devices are studied both in the dark and under illumination. The nature of the semitransparent metallic electrode M is varied. When the sandwiches are made and studied entirely under vacuum (10−7–10−8 Torr), no rectifying effect is observed in the dark and the open circuit voltag…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntercalation into niobium oxide phosphate hydrate (NbOPO4.3H2O) and comparison with vanadyl phosphate hydrate (VOPO4.2H2O)K. Beneke and G. LagalyCite this: Inorg. Chem. 1983, 22, 10, 1503–1507Publication Date (Print):May 1, 1983Publication History Published online1 May 2002…
A theory is formulated for the general fatigue response of brittle flaws which experience residual stress concentrations. The indentation crack is taken as a model flaw system for the purpose of setting up the basic fracture mechanics equations, but the essential results are expected to have a wider range of applicabi…
Smooth Pt and optically transparent electrodes can be functionalized with redox active polymeric material derived from the hydrolytically unstable {N,N'‐bis[‐3‐(trimethoxysilyl)propyl]‐4,4'‐bipyridinium}dibromide, I . The redox polymer on the surface is reversibly reducible to in either , and in the reduction of to is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting behavior of crystalline/compatible polymer blends: poly(iε-caprolactone)/poly(styrene-co-acrylonitrile)Peter B. Rim and James P. RuntCite this: Macromolecules 1983, 16, 5, 762–768Publication Date (Print):May 1, 1983Publication History Published online1 May 2002Publis…
Lanthanum‐modified lead titanate ceramics with a tetragonality of c/a = 1.028 to 1.000 were hot‐pressed and the dielectric, electromechanical, optical, and mechanical properties were investigated. With decreasing c/a , the Curie point, remnant polarization, coercive field, and electromechanical coupling factors decrea…
A review is given of research whose objective is to understand the principles governing corrosion beneath organic coatings. Eight subject areas of special interest are discussed: electrical properties of coatings, the nature of the metal substrate in determining coating performance, electrochemical processes which tak…
Magnetization measurements and X-ray diffraction experiments have been made on ε -Mn 3 Ga (71.4 at%Mn) having a triangular spin structure with a weak ferromagnetic component below 460 K. It has been found that the D0 19 -type hexagonal structure is slightly distorted to an orthorhombic structure below 170 K, and that…
The fragmentation response of explosive-filled cylinders of Armco iron and HF-1 steel with two heat treatments has been determined. The cylinders were filled with cast-in-place composition B explosive and detonated. At least 99% of the metal mass was recovered in all the experiments. The recovered fragments had both b…
The influence of annealing time (1–1000 hours), applied tensile stress (0–130 MPa), temperature (973–1073 K) and helium content (10–300 a.p.p.m.) on the size distribution and density of helium bubbles within the grains of AISI Type 316 stainless steel has been studied by TEM of α-implanted foil specimens. The results…
Bioactive porous structure coatings have received extensive attention because they can significantly improve the surface bioactivity of medical metal implants. However, traditional porous making technologies were restricted by the "upward growth" mode, with an obvious interface with the substrate, resulting in weak bo…
Thin films that are substantially amorphous arsenic sulfide have been prepared by spin deposition from solutions of n-propylamine or n-butylamine. These materials have been investigated by nuclear magnetic resonance, infrared absorption, and elemental analysis. A structural model is suggested based on As2S3 clusters s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of temperature and pressure on alkyl nitrate yields in the nitrogen oxide (NOx) photooxidations of n-pentane and n-heptaneRoger Atkinson, William P. L. Carter, and Arthur M. WinerCite this: J. Phys. Chem. 1983, 87, 11, 2012–2018Publication Date (Print):May 1, 1983Pub…
ABSTRACT The cation composition of water in the Aquia aquifer of southern Maryland changes systematically in the direction of ground‐water flow. In the upgradient parts of the aquifer, calcium is the dominant cation in solution. Between 10 and 20 miles downgradient, calcium and magnesium are dominant. Between 20 and 3…
A series of nomograms that simplify determination of diagnostic X-ray shielding requirements with lead are presented. All recommendations of the NCRP, except that to "add one half value layer" in determining secondary barriers, were followed in the production of these curves. For secondary barriers, the shielding requ…
The amino acid sequence of a single polypeptide chain, B-4, from fowl feather barbs has been determined. The B-4 chain was found to consist of 96 amino acid residues and to have a molecular weight of 10206 in the S-carboxymethylated form. The N terminus of this protein was an N-acetylserine residue. The B-4 protein co…
A mechanism for the toughening of brittle matrices with ductile particles is presented. It is shown that the constraints imposed on the particles by the rigid matrix suppress plastic deformation of the particles at crack tips so that the main contribution to composite toughness comes from ligament formation in the mat…
We describe highly accurate (0.2-1%) intensity measurements for the inelastic scattering of 75-keV electrons in \ensuremath{\sim} 1000-\AA{}-thick polycrystalline aluminum films in the region of (0.0-3.1)-${\mathrm{\AA{}}}^{\ensuremath{-}1}$ transferred wave vector and (0-100)-eV energy loss. The work was performed on…