Materials Literature
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The synthesis of metal-free and metallo derivatives ( Ni , Zn ) of tetrasubstituted phthalocyanines (Pcs) obtained from 4-[methyleneoxy(15-crown-5)]phthalonitrile is described. The new compounds have been characterized by elemental analyses, IR, 1 H and 13 C NMR , MS and UV-vis. The thermal stabilities of the compound…
A di(μ-phenoxo)Co II Cu I complex, [CoCu(L)]ClO 4 ·0.5DMF, has been prepared where (L) 2 - is a macrocyclic dinucleating compartmental ligand derived from the 2:1:1 condensation of 2,6-diformyl-4-methylphenol, ethylenediamine, and 3-thia-1,5-pentanediamine, having a salen-like N 2 O 2 metal-binding site (salen = N, N…
C -axis-oriented Bi 4 Ti 3 O 12 thin films were prepared on (111)Pt/Ti/SiO 2 /Si substrates by metalorganic chemical vapor deposition (MOCVD) using a sequential source gas supply method taking account of the crystal structure of Bi 4 Ti 3 O 12 along the c -axis. The X-ray diffraction intensities of Bi 4 Ti 3 O 12 (006…
A bulk Ge 20 Te 80 glass was prepared using a melt-quench technique. The crystallization mechanism was studied using differential scanning calorimetry (DSC), scanning electron microscopy and x-ray diffraction. DSC was performed at different heating rates under non-isothermal conditions. From the heating-rate dependenc…
A clinical field trial was performed on a herd of Hereford beef cows in central Saskatchewan. The herd had a history of being severely affected with vertical fissures. The objective of the study was to determine the effects of supplemental dietary biotin on the prevalence of vertical fissures in beef cows. In June 199…
The generalized-hydrodynamic theory for collective diffusion of a monodisperse colloidal suspension is developed in the framework of the Onsager-Machlup theory of time-dependent fluctuations. The time evolution of the intermediate scattering function F(k,t) is derived as a contraction of the description involving the…
Unit-cell parameters, optical properties, and chemical compositions have been measured for 103 samples in the tremolite-actinolite-ferro-actinolite series. The average values of the non-essential constituents are: T Al = 0.10(11), C Al = 0.06(6), B (Fe, Mn, Mg) = 0.09(7), B Na = 0.04(5), A Na = 0.09(9), and Cr, Ti, an…
Carbon nanomaterials were prepared by chemical vapor deposition (CVD) and hot-filament CVD (HF-CVD) methods. The substrates were silicon <100 > and copper plates on which catalytic metal or metal-oxide thin films were coated by means of the cathodic arc deposition technique. Ethylene gas was used as a precursor.…
The aim of this paper is to study the viscoelastic behavior of fibers during the woven fabric bagging process through a series of experiments and a mathematical model to simulate bagging under the testing conditions. Through a large number of computational experiments, the elastic modulus E 1 , viscoelastic modulus E…
Summary Surface podzolization has so far been diagnosed from morphological observations, selective extraction and mineralogical investigations. We studied this process in two Cambisol profiles developed in loess, one with a fibrimor humus and the other with a dysmoder humus, by characterizing the chemical composition…
A C T The purpose of the present study is to offer some information that will contribute to better understanding of subsurface crack initiation in b titanium alloys.Rotary bending fatigue tests were performed using smooth specimens of two materials that have been solution treated at different temperatures.Axial fatigu…
Abstract Octathexyloctagermacubane (1, thexyl = 1,1,2-trimethylpropyl) was synthesized by the condensation of trichlorothexylgermane with Mg/MgBr2, and structurally characterized by X-ray crystallography. As in the case of the thexyl-substituted octasilacubane, a ring-opening reaction followed by skeletal rearrangemen…
The aim of this work is to evaluate the efficiency of Activated Carbon Cloths (ACCs) as a refining treatment of membrane filtration in the case of effluent streams containing both dyes and suspended solids (SS) or colloids responsible for turbidity. It is divided into two parts. First, dye adsorption experiments are c…
The sintering of LaFeO 3 has been studied in the temperature interval 1100–1600°C in air. The effect of cation nonstoichiometry on densification, microstructure, and phase composition is emphasized. La 2 O 3 was observed to inhibit both sintering and grain growth. In Fe‐excess materials, exaggerated grain growth occur…
Electrochemical noise measurements were performed on electrodes made from a sample of AISI 304 (UNS S30400) stainless steel. Potential and current noise were measured under open-circuit conditions in a three-electrode system, one of the electrodes being maintained under load and acting as a working electrode. Two type…
Surface potentials can be regarded as diluted in space. By use of such a dilution model and Ericksen-Leslie theory we study the free relaxation of a nematic liquid crystal on an anchoring surface, after removal of an applied disorienting field. Depending on the initial distortions, we find either a relatively slow rel…
Isolated isothermal spheres of N gravitationally interacting points with equal mass are believed to be stable when density contrasts do not exceed 709. That stability limit does not, however, take into consideration fluctuations of temperature near the onset of instability. These are important when N is finite. Here w…
The microstructural evolution inside shear bands was investigated experimentally and analytically. A fine recrystallized structure (grains with 0.05-0.3 mu m) is observed in Ti, Cu, 304 stainless steel, Al-Li, and Ta, and it is becoming clear that a recrystallization mechanism is operating. The fast deformation and sh…
Sn-doped AgInO2 thin films were prepared on α-Al2O3(0001) single-crystal substrates by pulsed laser deposition. The films prepared under optimized conditions have high optical transmittance up to the near-ultraviolet region and high electrical conductivity. The optical band gap was estimated to be ∼4.1 eV, and electri…
Polarization-field and strain-field hysteresis loops with field-induced transition in two types of engineered domain configurations in perovskite-type oxide ferroelectrics were calculated in terms of the Landau-Devonshire type free energy. Using the free energy function truncated at the fourth order with respect to th…