Materials Literature
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The ternary phase diagram of Al 2 O 3 ‐La 2 O 3 ‐TiO 2 at 1400°C was determined with 12 compatibility triangles. Al 2 O 3 stabilizes the A‐site‐deficient La 2/3 TiO 3 perovskite structure. According to XRD and microstructural investigations, the solid solution extends along the La 2/3 TiO 3 ‐LaAlO 3 tie line from at l…
The effects of varying the levels of cell disruption achieved by high-pressure homogenization upon subsequent centrifugal separation of cell debris have been defined by measuring sedimentation velocity distributions of the cell debris. Using this data together with particle size distributions, a computer-based model o…
Three kinds of SrTiO3(001) surfaces, TiO2 terminated, SrO terminated, and a mixture of these surfaces, are selectively formed and their surface structures are examined by means of reflection high energy electron diffraction, x-ray photoelectron spectroscopy, and x-ray photoelectron diffraction. The TiO2 terminated sur…
When the ruminal bacterium prevotella ruminicola B(1)4-M was grown in a defined medium with an excess of glucose (3.6 mM ammonia and 50 mM glucose), the cells accumulated large amounts of cellular polysaccharide and the viable cell number decreased at least 1,000-fold. This decrease in viability was correlated with an…
We have carried out ab initio perturbed ion calculations in the rocksalt (B1) and cesium chloride (B2) phases of the alkali (A) chloride (ACl) crystals. Zero temperature (T), and pressure (P) lattice energies and equilibrium distances are computed with errors less than 5%. From static calculations, zero-T equations of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFaradaic charge transfer with double-layer charging and/or adsorption-related charging at polymer-modified electrodes as observed by color impedance spectroscopyT. Amemiya, K. Hashimoto, and A. FujishimaCite this: J. Phys. Chem. 1993, 97, 38, 9736–9740Publication Date (Print…
Abstract The growth kinetics and contact nucleation of calcite crystals were studied in a pH‐stat crystallizer. Large seed crystals up to 230 μm were successfully prepared by the gel growth technique. The crystal growth data over a wide range of crystal sizes were evaluated from titration curves by an initial slope me…
To evaluate the role of surface charge for the blood-brain barrier permeability, the albumin content was determined in the cerebrospinal fluid and in the brain 1 h after intracarotid infusion of protamine sulphate, a natural polycationic protein with a high content of arginine (mol. wt 4000-4400), poly-L-arginine (mol…
The initial growth process of diamond thin films formed by dc plasma chemical vapor deposition on cubic boron nitride ( c BN) surfaces of {111} B , {111} N and {100} has been investigated by scanning electron microscopy (SEM) and Auger electron spectroscopy (AES). On the {111} B surface, it is observed that the carbon…
General expressions for the free energy of the nematic liquid crystal in the interfacial region are derived using the density functional approach. The anisotropic part of the surface tension and the coefficients of the Landau–de Gennes theory for the nematic free surface are expressed in terms of the direct correlatio…
The double-well potential model, well known to describe many low-temperature properties of amorphous materials, has been extended to incorporate effects of high pressures. The resulting model not only explains the temperature and time dependences of pressure-induced phenomena but also provides possible explanations fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxo- and hydroxo-bridged (porphyrin)iron(III)-copper(II) species as cytochrome c oxidase models: acid-base interconversions and x-ray structure of the Fe(III)-(O2-)-Cu(II) complexAlaganandan Nanthakumar, Stephen Fox, Narasimha N. Murthy, Kenneth D. Karlin, Natarajan Ravi, Bo…
We generalize a previous model that was proposed to interpret the thickness dependence of the anchoring energy relevant to the nematic-liquid-crystal--solid substrate interaction. We show that beside the dielectric coupling between the surface electric field and the nematic liquid crystal, the quadrupolar flexoelectri…
Abstract A single-crystal X-ray analysis has revealed that the FeII–edta complex, formulated as Na2[Fe(edta)(H2O)]·2NaClO4·6H2O, has a seven-coordinate structure close to a mono-capped trigonal prism (C2v-CTP). The crystal data are as follows: Orthorhombic, Pmnb, a = 11.404(1), b = 23.573(2), c = 9.915(1) Å, and Z = 4…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcess designs for fractional crystallization from solutionLuis A. Cisternas and Dale F. RuddCite this: Ind. Eng. Chem. Res. 1993, 32, 9, 1993–2005Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSmall-angle scattering investigations of poly(.epsilon.-caprolactone)/polycarbonate blends. 1. Small-angle neutron and x-ray scattering study of crystalline blend morphologyY. W. Cheung, R. S. Stein, G. D. Wignall, and H. E. YangCite this: Macromolecules 1993, 26, 20, 5365–5…
We present a time dependent theoretical approach to calculating the electronic properties of semiconductor nanoclusters. The technique can be applied to ground and excited electronic states without using the effective mass approximation or perturbative expansions. The effects of surface properties on the electronic st…
Using surface optical second-harmonic generation, we have determined the molecular tilt angle and the in-plane orientational order of the liquid-crystal molecules 4'-n-octyl-4-cyanobiphenyl (8CB) on a series of polyimide surfaces. The polyimides differ in the length of the flexible spacers in between neighboring aroma…
One of the key processing concerns in the integration of thin film capacitors into the existing VLSI for ferroelectric or dynamic random access memory applications is the patterning of these films and the electrodes. In this work, we have identified a suitable etch gas for dry etching of PZT thin films on electrodes.…
Abstract Polyaniline (PAN) samples of high intrinsic oxidation states, such as the nigraniline (NA) and pernigraniline (PNA) oxidation states, were prepared by chemical oxidation of the 50% oxidized emeraldine (EM) base and the fully reduced leucoemeraldine (LM) base, according to the methods reported in the recent li…