Materials Literature
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Crystalline, submicrometer strontium ferrite powders, including SrFeO 2.97 , SrFe 2 O 4 , Sr 2 FeO 4 , Sr 3 Fe 2 O 6.16 , and SrFe 12 O 19 , were prepared by spray pyrolysis of an aqueous solution of mixed metal nitrates. The Sr:Fe mole ratio in the precursor solution was retained in the final products. Phase‐pure mat…
The effects of non-central forces in atomistic studies of grain boundaries in molybdenum and tungsten, the transition metals with half-filled d-band, are investigated. For this purpose we have used two different types of potential which include different number of moments of the local density of electronic states when…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermotropic Liquid Crystals of Main-Chain Polyesters Having a Mesogenic 4,4'-Biphenyldicarboxylate Unit. 6. Chiral Mesophases of Polyesters with a (S)-2-Methylbutylene SpacerJunji Watanabe, Manabu Hayashi, Atushi Morita, and Masatoshi TokitaCite this: Macromolecules 1995, 2…
Interfacial structure in the isotropic phase of a liquid-crystalline material near a wall is studied by a mean-field density-functional theory. With increasing strength of the wall anchoring potential, the theory predicts a first-order transition from incomplete to complete wetting by the smectic-A phase at bulk isotr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReconsidering Random Copolymers at InterfacesScott T. Milner and Glenn H. FredricksonCite this: Macromolecules 1995, 28, 23, 7953–7956Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/…
Renewed interest in absorption of H and D into transition metals has been stimulated by current work on metal‐hydride anodes for rechargeable batteries and by the intense interest in recently studied anomalous phenomena associated with absorption of D into Pd. One principal problem in this field is how site‐blocking e…
PURPOSE: This experimental study was designed to investigate the collagen fibrils of colonic anastomoses in rats and to compare normal healing with rats treated with biosynthetic growth hormone (bGH). METHODS: The healing zone of left colonic anastomoses was studied at days 2, 4, and 6 after surgery by means of scanni…
In this work we have studied the vibrational (relaxation) contributions beta(r) and gamma(r) to molecular nonlinear optical (nlo) properties of polyenovanillins, a class of push-pull molecules with increasing number n of conjugated CC bonds (n = 1, 3, 4, 5). Both experiments and ab initio calculations have been carrie…
The longitudinal (LA) and transverse (TA) Brillouin spectra along [001] phonon direction have been measured as a function of temperature (50–475 K) in single-crystal PbMg1/3Nb2/3O3 with scattering angles θs=180° and 32.5±0.2°. The Brillouin frequency shift with decreasing temperature shows a broad softening anomaly fo…
Several neutral solutes, ranging in size from methanol to a tetrasaccharide, stachyose, are shown to stabilize the left-handed Z form of the methylated polynucleotide poly(dG-m5dC). The action of these solutes is consistent with an osmotic stress, that is, with their effect on water chemical potentials coupled to a di…
We present an experimental study of the transformation avalanches taking place during a thermally induced thermoelastic martensitic phase transition of a Cu-Zn-Al alloy. We have studied the statistical distribution of amplitudes and durations of the acoustic emission signals released in the avalanches and found them t…
We introduce a mean field model that allows us to determine the interfacial behavior of AB random copolymers. Through this model, we calculate the reduction in interfacial tension \ensuremath{\gamma} that occurs when the random copolymers localize at the interface between immiscible homopolymers A and B. We also isola…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility and Thermal and Crystallization Behaviors of Poly(D-(-)-3-hydroxybutyrate)/Atactic Poly(methyl methacrylate) BlendsA. Siciliano, A. Seves, T. De Marco, S. Cimmino, E. Martuscelli, and C. SilvestreCite this: Macromolecules 1995, 28, 24, 8065–8072Publication Date (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Properties of Poly(2,5-di-n-dodecyl-1,4-phenylene) Depending on Chain LengthT. F. McCarthy, H. Witteler, T. Pakula, and G. WegnerCite this: Macromolecules 1995, 28, 24, 8350–8362Publication Date (Print):November 1, 1995Publication History Published online1 May…
The effect of thermally induced microcracks on the fracture toughness and fractal dimension of fully crystalline lithia disilicate glass‐ceramics was studied. The fracture toughness, K IC , for the nonmicrocracked lithia disilicate, 3.02 ± 0.12 MPa·m 1/2 , was significantly greater than the value of 1.31 ± 0.05 MPa·m…
The light scattering spectra of several recently investigated glass-forming systems are reanalyzed. The analysis shows that for both fragile and nonfragile glass-forming liquids, there is some general scenario for the dynamics at high temperatures that seems to follow the qualitative scenario suggested by the mode-cou…
ADVERTISEMENT RETURN TO ISSUEPREVArticleHeteropolyagostic Interactions in Lanthanide(III) Diisopropylamido ComplexesWilliam J. Evans, Reiner Anwander, Joseph W. Ziller, and Saeed I. KhanCite this: Inorg. Chem. 1995, 34, 23, 5927–5930Publication Date (Print):November 1, 1995Publication History Published online1 May 200…
We report the first measurement of giant magnetoresistance at 10 GHz in a bulk ceramic sample of Nd 0.7 Sr 0.3 MnO 3 . From the surface resistance data, we deduce that the magnetoresistance, [ϱ μW (0)−ϱ μW ( B )]/ϱ μW (0) at 1.2 T, has a peak value of approximately 90% at 215 K. The microwave studies are supplemented…
Simple complementation assay systems were developed for the substrate-specific proteins PB of glycine reductase, sarcosine reductase, and betaine reductase, in which acetyl phosphate was detected as the product in all three cases. The betaine-specific subunits of protein B (PB betaine) responsible for betaine reductas…
Hexacyanometalates [BIII(CN)6)]3- react with Lewis acids [AL]2+ or A2+ to give either oligonuclear complexes with high-spin ground states [BIII(CN-AIIL)6)]9+ or three-dimensional (3D) networks with variable Curie temperature TC. We report the magnetic properties of (i) an heptanuclenr complex [Cr(CN-Ni(tetren)6](ClO4)…