Materials Literature
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Powder neutron-diffraction experiments at pressures up to 8.2 kbar and temperatures down to 0.3 K have been performed on the antiferromagnetic ternary compound ${\mathrm{Tm}}_{2}$${\mathrm{Fe}}_{3}$${\mathrm{Si}}_{5}$. For pressures between 2 and 21 kbar, this system becomes superconducting at ${T}_{c1}>{T}_{N}$, w…
A constitutive relation is formulated for coated fabrics that exhibit both elastic and inelastic, but time‐independent, responses. The nonlinear orthotropic response is represented by an elastic portion related to yarn stretch and coating shear, and an inelastic part related to crimp interchange. A method is proposed…
ABSTRACT The stability of glutamine and pyroglutamic acid as regards pH, temperature and oxygen was studied during storage and two thermal processings, the residual products and those which appeared being determined. Contrary to glutamic acid, the two derivatives are labile below pH 2 and above pH 13 and alteration oc…
It has recently been reported that 8S clathrin trimers or "triskelions" form larger 27S oligomers upon dialysis into low ionic strength buffers (Prasad, K., R. E. Lippoldt, H. Edelhoch, and M. S. Lewis, 1986, Biochemistry, 25:5214-5219). Here, deep-etch electron microscopy of the 27S species reveals that they are clos…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBreakdown of passivity and localized corrosion processesH. BoehniCite this: Langmuir 1987, 3, 6, 924–930Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inissue 1 November 1987https://doi.org/10.1021/la00078a010RIGHTS & PERMISS…
Abstract CB facilitates strain-induced crystallization and increases the size of the crystallized zone at the stressed crack tip. Both effects are major reinforcement mechanisms that increase the fracture resistance of CB-reinforced NR.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(dimethylsiloxane-co-diphenylsiloxanes): synthesis, characterization, and sequence analysisG. N. Babu, S. S. Christopher, and R. A. NewmarkCite this: Macromolecules 1987, 20, 11, 2654–2659Publication Date (Print):November 1, 1987Publication History Published online1 May…
Simulations of the switching behavior in a ferroelectric liquid crystal were carried out with the model proposed by Handschy and Clark. There appear to be various types of switching processes for changing surface anchoring force. Results of simulations are compared with experimental observations, some of which seem to…
The autotroph Methanococcus maripaludis contained high levels of acetate-coenzyme A ligase, pyruvate synthase, pyruvate, water dikinase, pyruvate carboxylase, and the enzymes of the incomplete reductive tricarboxylic acid cycle. Phosphoenolpyruvate carboxykinase, citrate synthase, and isocitrate dehydrogenase were not…
Polythiophene and polybithiophene polymer films were deposited on platinum, tungsten, and glassy carbon electrodes by anodic oxidation of the monomer in ambient temperature molten salts, consisting of a mixture of aluminum chloride and 1‐methyl‐3‐ethyl‐imidazolium chloride. The formation reaction of polythiophene and…
Nitrogen (N) has been shown to exert a beneficial influence on localized corrosion resistance of austenitic stainless steels. With duplex stainless steels (SSs), N plays a dual role of controlling the austenite to ferrite ratio and increasing corrosion resistance. In addition, on rapid cooling from high temperatures,…
Abstract Kinetics of K release were investigated on a Kenansville loamy sand (loamy, siliceous, thermic Arenic Hapludults), a Rumford loamy sand (coarse‐loamy, siliceous, thermic Typic Hapludults), and a Sassafras fine sandy loam (fine‐loamy, mixed, mesic Typic Hapludults) from the Delaware Coastal Plain. Previous fie…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmmonia-catalyzed silylation reactions of Cab-O-Sil with methoxymethylsilanesJ. P. Blitz, R. S. Shreedhara Murthy, and D. E. LeydenCite this: J. Am. Chem. Soc. 1987, 109, 23, 7141–7145Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Publ…
The elastic constants of open‐cell aluminas were measured as a function of their relative density and cell size. The density exponent was found to be in excellent agreement with previous theoretical work that considered cell strut bending as a major deformation mode. The measured constants in the elastic behavior rela…
Classical brittle failure has been observed for ceramic fibers produced by pyrolysis from three different polymer precursors. Characterization by SEM fractography methods has shown typical flaw‐mirror‐mist‐hackle morphology and such study has provided observations for understanding the fracture mechanisms. The gage le…
An equation accounting to lowest order for the effects of liquid compressibility on the radial motion of a spherical bubble is deduced from the statement of energy conservation for the liquid.
Abstract Self‐diffusion of 44 Ti is measured in β‐Ti under UHV conditions in the whole range of existence of the b.c.c. phase. The Arrhenius plot shows a strong upward curvature in agreement with previous investigations of Murdock et al. The anomalous diffusion behaviour is related to the experimentally observed softe…
Hydrogenase I (bidirectional) and hydrogenase II (uptake) of Clostridium pasteurianum have been investigated by electron paramagnetic resonance (EPR) spectroscopy, in the presence and absence of the inhibitor, CO. These hydrogenases contain both a novel type of iron-sulfur cluster (H), which is the proposed site of H2…
Abstract Octahedral Fe(III) in the crystal structures of three different smectites was reduced to Fe(II) by actively growing microorganisms indigenous to the clay. The smectites were SWa‐1 ferruginous smectite from Grant County, Washington; API 33a, Garfield Nontronite; and API 25, Upton montmorillonite. Bacterial gro…
The structures of amorphous zinc silicate and sodium zinc silicate have been studied using the molecular dynamics computer simulation technique. Results showed that bond lengths and coordination numbers for the individual atomic species fit within the range of results from a number of crystalline and glassy silicates.…