Materials Literature
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We present the first report of icosahedral phase i-phase formation in rapidly quenched alloys of Ti Zr Co . Electron diffraction patterns of i TiZrCo 53 27 20 contain features, such as anisotropic spot shapes and arcs of diffuse scattering, that are characteristic of the disordered icosahedral phases found in Ti 3d tr…
Calculations of SCF molecular magnetizabilities in terms of GIAO magnetic current density distributions are presented. for incomplete basis sets, this “GIAOCD” method is not, in general, equivalent to the conventional GIAO magnetic Hessian approach to calculating molecular magnetizabilities. However, even for basis se…
Nd: YVO 4 powders and thin films were successfuly synthesized by the sol–gel method using metal alkoxides. A homogeneous and stable solution was prepared by the reaction of Y(OEt) 3 , VO(O i Pr) 3 , and Nd(OEt) 3 in 2‐methoxyethanol. The precursor was a mixture of vanadium and yttrium double alkoxide. Precursor films…
Micropatterning of ferroelectric Bi 4 Ti 3 O 12 was carried out using an electron-beam-induced reaction of metal octylate films. Bismuth and titanium octylates were used as starting materials. Precursor solutions were prepared by mixing the octylates at a Bi:Ti molar ratio of 5.2:3.0 and diluting with acetone. The met…
Abstract We studied in detail the effects of pressure and shear stress on the crystallization behaviors during injection molding process. Crystallization of isotactic-polypropylene (iPP) was simulated for various injection flow rates. The crystallization started during the filling stage under long filling condition. M…
We previously reported that a gene hpcopA isolated from Helicobacter pylori is associated with copper transport. In the present study, the DNA upstream of the hpcopA was cloned and the nucleotide sequence analyzed. An open reading frame coding for 124 amino acids was predicted, which was connected in frame to the hpco…
The rotational moulding processing method for plastics is steadily expanding its product range and market areas. However, a drawback of the process has always been the surface pinholes and internal bubbles which occur in the products due to the inherent nature of the process. In an attempt to alleviate this problem, a…
This article presents a comparative study of ibuprofen materials in their solid state. Ibuprofen crystallizes into two different structures for the S(+) enantiomer (dexibuprofen) and racemic ibuprofen. The crystal structure of ibuprofen, its optical absorption and photoluminescence, and the thermodynamic results (melt…
The vaporization of LaCrO 3 (s) and samples of the composition LaCrO 3 + La 2 O 3 was investigated in the temperature range of 1887‐2333 K by Knudsen effusion mass spectrometry using Knudsen cells made of tungsten lined completely with iridium. The species Cr(g), CrO(g ), CrO 2 (g), and LaO(g) were identified in the v…
Abstract An experimental investigation was conducted to research the cell nucleation behavior in the extrusion foam processing of polypropylene (PP) using hydrocerol and isopentane. While the hydrocerol and isopentane are considered to function as the nucleating agent which determines the cell‐population density and a…
Abstract X‐band EPR spectra of Mn 2+ in ferroelastic BiVO 4 single crystals at room temperature taken in three orthogonal planes are analyzed using a twestage least‐squares fitting procedure. The absence of site splitting from the spectra shows unequivocally that Mn 2+ lies on a site with two‐fold rotation symmetry, w…
The sinter forging behavior of α‐Al 2 O 3 seeded and unseeded nanocrystalline θ‐Al 2 O 3 was investigated as a function of temperature, stress, and strain rate. Seeded samples exhibited the highest degree of plastic deformation during the θ‐ to α‐AI 2 O 3 phase transformation. As a result, microstructure control, incr…
We have observed an arch-texture in cholesteric liquid crystals sandwiched between two glass plates making a small wedge angle. The anchoring is homeotropic on one plate and planar on the opposite one. This texture is locally periodic and composed of parallel stripes whose average direction rotates by 180° each time t…
Silk was degummed with eight different commercially available enzymes, viz. Degummase lOOOL, Protosol, Trypsin, AIcalase, Protease A, Protease N, Pepsin and Protease M. The degumming conditions with respect to concentration and time were optimised for each enzyme. Enzyme activity, an important intrinsic property, and…
Abstract New soluble cellulosics with interesting molecular structures and properties were obtained by the acylation of remaining hydroxyl groups of pure, homogeneously synthesized p ‐toluenesulfonylcelluloses of different degree of p ‐toluenesulfonyl (tosyl) substitution (DS Tosyl ) ranging from 0.5 to 2.0 in pyridin…
Summary The cation exchange capacity (CEC) of 18 samples (<2 mm) of five acid soils developed on granite or gneiss was measured before and after H 2 O 2 treatment from pH‐unbuffered extraction solution (1 N KCl). The pH in water of the soils ranged from 3.4–4.7. The samples were separated into seven fractions (<…
The grain‐growth data presented in a companion paper for the Al 2 O 3 ‐SiC system are analyzed. Central to the analysis is the experimentally observed relationship between the fraction of particles on grain boundaries, φ, and the average grain size, G. This relationship is included in both the equilibrium‐grain‐size e…
Abstract The adsorption of Cd and Zn on a standard montmorillonite (SAZ-1) in the presence of the cationic pesticide chlordimeform, both in solution (simultaneous adsorption) and when the pesticide is previously adsorbed on the clay (successive adsorption) has been studied. The adsorption of Zn decreases when the chlo…
Evidence from a variety of space experiments confirms that gravity does, in some cases, have a significant effect on the crystallization of macromolecules. This has been demonstrated by numerous investigators employing a wide range of instruments and proteins. In the absence of gravity, convective transport of solute…
Abstract The structure of a highly disordered synthetic birnessite was studied by comparing powder X-ray diffraction (XRD) data with calculated patterns generated by BIRNDIF and WILDFIRE© in an attempt to describe the nature of disorder and to estimate the size of the coherent diffracting domains. The material has a t…