Materials Literature
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A new theory of dynamic correlations in a strongly coupled, classical one-component plasma (OCP) is developed within the generalized viscoelastic formalism. Fully convergent kinetic equations for the strongly coupled OCP are thereby derived with the aid of a fluctuation-theoretic formulation of the collision integrals…
A series of approximately 150 tests were conducted on ceramic targets struck by cylindro-conical hard-steel projectiles at normal incidence up to velocities of about 1000 m/s. The primary objective was the determination of the effect of layering and the delineation of the ballistic limit of various combinations. In ad…
The main results of the theory of seignette-magnetism are presented. The data on crystalline structure, phase transitions and the properties of more than 70 different seignette-magnetic compounds are reported. Some experimental data on the interaction between dielectric and magnetic properties of seignette-magnets are…
The nucleotide sequence of a 2.9-kilobase Bacillus subtilis DNA fragment containing the entire coding region of aspartokinase II and adjacent chromosomal regions (Bondaryk, R. P., and Paulus, H. (1985a) J. Biol. Chem. 260, 585-591) has been determined. The results confirmed the earlier prediction that the two subunits…
Abstract Untaxial tension tests to the yield point were performed on polypropylene as a function of temperature from 22 to 143°C at a strain rate of 2 min −1 . At 22, 42, and 71°C, measurements were also made at strain rates from 0.02 to 8 min −1 . Yield energy was found to be a linear function of temperature extrapol…
The insulation strength of solid dielectric spacers, sand wiched between electrodes and stressed by dc voltage, can be influenced by surface charges building up during voltage application. The measurement of these trapped charges is diffi cult during the charge accumulation process, but may be car ried out by means of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsically electrically conducting poly(metal tetrathiooxalates)John R. Reynolds, James C. W. Chien, and C. Peter LillyaCite this: Macromolecules 1987, 20, 6, 1184–1191Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 J…
Water adsorption and surface conductivity on ceramic substrates are important parameters in the electrochemical corrosion of thin-film metallizations and the associated growth of dendrites in humid environments. The adsorption of water provides the necessary electrolyte through which ion migration and electrochemical…
Reactor physics tests at initial startup and after refuelings are performed to verify the nuclear design and to assure safe operation. Analog computers and instruments are widely used for the acquisition of data, and these data are reduced by hand. These conventional procedures, however, require much time and labor. S…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoelectron spectroscopy with variable photon energy. A study of the metal hexacarbonyls M(CO)6 where M = Cr, Mo, and WGlyn Cooper, Jennifer C. Green, Martin P. Payne, Barry R. Dobson, and Ian H. HillierCite this: J. Am. Chem. Soc. 1987, 109, 13, 3836–3843Publication Date…
The conversion of the reducible divalent cross-links in collagen to non-reducible multivalent cross-links in mature collagen has resulted in the identification of several new amino acids as the putative mature cross-link. None of these compounds has completely satisfied the necessary criteria. We have now isolated an…
The approach of free radical polymerization is adapted to develop a kinetic model for predicting the curing behavior of unsaturated polyester resins. The approach taken here is essentially similar to that advanced by Stevenson with some modifications, namely (1) the efficiency of the initiator is assumed to decrease w…
ABSTRACT Some modern laminated and calcified stromatolitic structures are partially or completely formed by eukaryotes. Diatom populations in freshwater environments with elevated ionic concentrations contribute to calcite precipitation, and the formation of distinctive mineral‐rich stromatolitic laminae. Two types of…
Abstract Dimethylselenoxide (DMSeO) forms three structurally resolvable intercalates with kaolinite (d(001) = 10.95, 11.26, and 11.38 Å). The 11.26-Å kaolinite: DMSeO intercalate is structurally analogous to the 3-D ordered kaolinite: DMSO intercalate (d(001) = 11.22 Å). Infrared and solid-state 77 Se nuclear magnetic…
Some properties of the polyesters treated with such an addition-type chain extender as 2,2′-bis(2-oxazoline) (BOZ) have been investigated. The molecular size distribution and the melting point of the resultant polyesters indicate that BOZ reacts to form linear chain-extended polymers without branching. As for their th…
A solid‐state thin film rechargeable battery has been prepared using a novel efficient technique of "surface complexation method" by which a thin layer of Prussian blue (PB) can be overlaid on a solid polymer electrolyte of Nafion (Nf) as matrix. An electrochemical cell made of the composite PB‐Nf film sandwiched with…
We studied the effect of K+ fertilizer application on the transformation of clay minerals in soils from long-term field experiments and exhaustive cropping pot experiments. Soils used were alluvium, gray-brown, and brown soils with illite as the principal clay mineral. X-ray diffraction analysis of soil samples reveal…
We present calculations of the light intensity transmitted through a uniform ferroelectric liquid crystal light valve during electrooptic switching. We discuss the calculated delay time and rise time of the optical response, and show how they depend on spontaneous polarization, dielectric anisotropy, applied electric…
Frequently, first-order phase transitions in solids are characterized by the coexistence of a disordered phase and several ordered phases. Near such a transition, the disordered phase may appear in the surface region of the crystal even though the bulk crystal remains in one of its ordered states. This leads to severa…
The static and cyclic fatigue behavior of sintered silicon nitride was investigated at room temperature. Flexure specimens, with an indentation‐induced flaw at the center, were tested under a static or cyclic load applied by four‐point bending. Sintered silicon nitride was shown to be susceptible to static and cyclic…