Materials Literature
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An analysis of the 109Ag isotropic chemical shift δ in the glasses of the AgI:Ag2O:B2O3 system is presented. In these glasses, δ covers a range of ∼500 ppm but does not depend linearly upon the fraction of I− anions X=[I]/[Ag]. This means that, when AgI is added to the borate network, structures are preferentially for…
Jump conditions having a hysteresis effect are introduced to model some inertial mechanisms which yield criteria of control of systems. Examples can be found in biology, chemistry, engineering, and economics. Both orientations of the hysteresis loops are considered, corresponding to “delay” and “anticipation” between…
A numerical investigation of the tensile test using a finite-difference, one-dimensional elasto-viscoplastic code is presented. The influence of strain rate, strain rate sensitivity, and inertia on the development of the axial particle velocity, stress, strain, and strain rate profiles in pure copper is studied. The i…
Three regions of the byssus of the marine mussel Mytilus edulis L. are distinct in structural organization at the macroscopic and microscopic level and in amino acid composition. The threads that emanate from the stem at the base of the foot are divided into two regions. The proximal, elastic region has a crimped, den…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible oxidation and rereduction of magnesium phthalocyanine electrodes. Electrochemical behavior and in situ Raman spectroscopyJ. L. Kahl, Larry R. Faulkner, K. Dwarakanath, and H. TachikawaCite this: J. Am. Chem. Soc. 1986, 108, 18, 5434–5440Publication Date (Print):Se…
A new method is proposed to estimate the defocus (Δf) from a single electron micrograph (EM). The method has been tested by simulations using theoretical EM's calculated under different defocus conditions. The preliminary method is successful except when the EM is taken near the optimum defocus. This can be improved b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPeptide plane orientations determined by fundamental and overtone nitrogen 14 NMRR. Tycko, P. L. Stewart, and S. J. OpellaCite this: J. Am. Chem. Soc. 1986, 108, 18, 5419–5425Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published in…
The defect structure and dielectric properties of BaTiO 3 with 1 to 10 mol% Nd 2 O 3 additions were studied. The results indicated that neodymium occupies the barium site and charge compensation takes place by creation of titanium vacancies. The dependence of inverse electric susceptibility, spontaneous polarization,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA vibrational study of lithium sulfate based fast ionic conducting borate glassesE. I. Kamitsos, M. A. Karakassides, and G. D. ChryssikosCite this: J. Phys. Chem. 1986, 90, 19, 4528–4533Publication Date (Print):September 1, 1986Publication History Published online1 May 2002P…
Effective chain extenders for linear polyesters such as poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) were sought among some nitrogen-containing bisheterocycles, which were reactive with hydroxyl terminals of the polyesters to form addition linkages. Tested were such bis cyclic-imino-esters…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExperimental and quantum-chemical investigation of the magnetic exchange mechanism in a series of (.mu.-terephthalato)bis[(polyamine)copper(II)] complexesE. G. Bakalbassis, J. Mrozinski, and C. A. TsipisCite this: Inorg. Chem. 1986, 25, 20, 3684–3690Publication Date (Print):…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEpitaxial growth mechanism of diamond crystal in methane-hydrogen plasmaMinoru. Tsuda, Mitsuo. Nakajima, and Setsuko. OikawaCite this: J. Am. Chem. Soc. 1986, 108, 19, 5780–5783Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published…
ABSTRACT From more than one hundred nickel‐aluminum (Ni‐AI) bronze sand cast ship propellers, the effect of thickness on the properties of the material has been investigated. For this purpose the mechanical and corrosion fatigue properties nave been measured on pieces of material from the thickest part of the castings…
This 100-year review examines the development of electrical insulation subdivided into materials, test methods and standards.
Decarburization treatment performed by motor and transformer manufacturers often results in internal oxidation of the solute elements. The presence of subscale (zone affected by precipitation of Si-Al oxides) adversely affects magnetic properties, particularly permeability of the annealed steel. The permeability deter…
Abstract A series of di- and trinuclear copper(II) complexes containing N,N,N′,N′-tetramethylethylenediamine(tmen), N,N-diethylethylenediamine(deen), 2,2′-bipyridyl(bpy) or 1,10-phenanthroline(phen) and azide, thiocyanate or cyanate ions have been prepared and characterized by their magnetic susceptibilities, infrared…
The 13C nuclear magnetic resonance spectra of MMA-EMA copolymers have been recorded and analyzed. The carbonyl carbon resonance region contains six resonating peaks due to its sensitivity to triad concentrations. From these signals, triad concentrations were determined and compared with calculated values based on Bern…
In addition to reduction to the pole of total intensity magnetic anomalies, two new magnetic transformations, reduction to the equator and orthogonal reduction, can be used to correct the asymmetry and lateral shift of measured magnetic total field profiles. These transformations can be implemented in both space and f…
The magnetic and structural properties of melt spun MM-Fe-B ribbons, where MM stands for misch metal, were examined. It has been shown that the MM16Fe75B9ribbon can exhibit a coercive force of 9.4 kOe and an energy product of 8.1 MGOe when it was quenched at the optimum rate of 20 m/sec, in terms of quenching wheel su…