Materials Literature
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The effects of oxygen partial pressure on Y123 single-crystal growth, morphology and properties were investigated. YBCO (Y123) single crystals were fabricated using the crystal pulling method under 1 atm oxygen pressure. Compared with crystals fabricated under air atmosphere, it was found that this high oxygen partial…
By the action of a small amount of an acid, 2-phenyl-2-(2-tosyloxyethyl)-1,3-dioxolane decomposed to give p-toluenesulfonic acid resulting in the proliferation of acid molecules. The decomposition manner was stepwise in solution state and autocatalytic in polymer film. The sensitivity of an acid-catalyzed photoimaging…
Two devices for quantifying the basis weight and fiber orientation distribution func tion in nonwoven webs have been developed and studied. The basis weight device measures the attenuation of a light beam by the fabric. The particular device is im plemented, calibrated, and tested at speeds up to 400 m/min. By statist…
The temperature variations of the refractive index and of the linear birefringence have been studied in flux-grown nominally pure and (SBT) single crystals (x = 0.02, 0.08 and 0.17) in the temperature range from 5 to 300 K. Polar domain structures were studied by polarizing microscopy. In SBT (x = 0.17) two phase tran…
Cured silicone modified polyimide (PI) on packaged dice and blanket wafers were dry etched in a ambient under varying conditions in both a production reactive ion etching (RIE) tool in an integrated circuit (IC) clean room environment and in a desktop RIE tool in a laboratory environment. It has been consistently foun…
A description is provided of the anomalous conchiolin deposits which are formed by Pinctada maxima and which are associated with unusual mortalities. Comparisons are made with brown ring disease found in Ruditapes philippinarum and juvenile Crassostrea virginica. In P. maxima, the deposits are not organized into a rin…
Carbon residue after binder burnout was characterized for several nonstoichiometric lead titanate powders. Thermal decomposition of the poly(methyl methacrylate) (PMMA) binder was performed in nitrogen at 600°C. A drastic decrease in carbon retention was obtained in the case of the titanium‐rich samples. The amount of…
Abstract Durch chemischen Transport mit Cl 2 oder TaCl 5 /Cl 2 als Transportmittel wurden ausgehend von entsprechenden Ausgangsbodenkörpern im Temperaturgefälle T 2 → T 1 (z. B. 1000 °C → 980 °C) farblose {braunschwarze}, hexagonale Einkristalle von Th 4 Ta 18 O 53 {U 4 Ta 18 O 53 } mit den Gitterkonstanten a = 6,2554…
The transformation behaviour of Cu-Mn-based high damping alloys aged within a miscibility gap has been studied intensively using transmission electron microscopy (TEM), with particular attention to fine-scale dynamical movements in segregated microstructures, termed ‘flickering’. As ageing proceeds, features appear in…
The equilibrium of an elastic thin plate in contact with a drop of fluid (both surrounded by another fluid), including capillarity (i.e., the thermodynamic properties of the fluid–fluid and solid–fluid surfaces), leads to a variational problem with discontinuities of some derivatives of the elastic displacement of the…
We report x-ray photoemission spectra of poly(methyl methacrylate) (PMMA). XPS spectra were measured with the SSI, SSX-100 model, using monochromated Al Kα x-rays. We present the survey spectrum (binding energy range of 0–1100 eV) and narrow spectra of C 1s and O 1s. The polymer is used as a reference to study the inf…
Changes in the photoluminescence (PL), microstructural morphology and the chemical nature of the surface of porous silicon (PS) when it is attacked with a 1:1 mixture of concentrated hydrofluoric acid and water have been studied. As the PS dissolves, the porous structure is essentially destroyed while the appearance a…
The pyrolysis kinetics of cellulosic uncoated printing and writing paper, which is one of the principal materials contributing to the municipal solid waste (MSW) of Taiwan, was investigated with a thermal gravimetric analysis (TGA) reaction system. The experiments were carried out in a nitrogen environment in the 450–…
The metal-catalyzed Baeyer-Villiger oxidation of cyclohexanone with molecular oxygen (latm) in the presence of benzaldehyde gives δ -caprolactone in high yield. The same oxidation in the absence of metal catalysts is also studied. Additives to the system can improve the reaction highly efficiently.
The synthesis of the 3-pyrrylacetic acid as well as the study of its esterification conditions are described. The new materials thus obtained are electropolymerized.
Chloride (Cl-)-induced pitting corrosion of iron at pH 10.5 and 25°C was examined by conducting quasi-steady-state (potentiostatic) polarization experiments in borate-buffered 0.1 M sodium chloride (NaCl) solutions with buffer concentrations from 0 M to 0.075 M. Values of the film breakdown potential (Eb) were scatter…
The structure of hexamagnesium sulfonyl tetradecahydroxide, Mg 6 SO 2 (OH) 14 , has been determined with an extremely small single-crystal ( ca 0.5 × 100 × 2.5 μ m) using synchrotron radiation [1.00 (1) Å]. The crystal is orthorhombic with space group Ccmm (No. 63), a = 15.895 (1), b = 3.105 (1), c = 13.367 (1) Å, V =…
H. Ray Gamble, Raymond H. Fetterer, Linda S. Mansfield, Developmentally Regulated Zinc Metalloproteinases from Third- and Fourth-Stage Larvae of the Ovine Nematode Haemonchus contortus, The Journal of Parasitology, Vol. 82, No. 2 (Apr., 1996), pp. 197-202
Abstract Ring oxidized green Cerium(IV)diphthalocyanines, [Ce(Pc) 2 ]X (X = (poly)halide, NO 3 - ) are prepared by chemical oxidation of ( n Bu 4 N)[Ce(Pc 2- ) 2 ] with the corresponding halogen in solution or of solid [Ce(Pc 2- ) 2 ] with aqueous HNO 3 Electrochemical oxidation of (nBu 4 N)[Ce(Pc 2- ) 2 ] in solution…
Nickel sulflde powders were precipitated by utilizing the thermal decomposition of thioacetamide in acidic aqueous solutions. Precipitation was induced by a direct reaction between thioacetamide and nickel at 70° and 80°C with thioacetamide concentrations of 0.80 M . Precipitation was induced by reaction of sulfide io…