Materials Literature
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Silver and Ag‐Pd alloy are cofired with BaTiO 3 ‐based dielectrics during the manufacturing of capacitors. The diffusion of silver into BaTiO 3 during sintering is very slow. However, the vapor pressure of silver is high at temperatures greater than the melting point of silver (960°C). The effect of the evaporation of…
PURPOSE: To compare the effects of gadolinium concentration on intermediate-weighted fast inversion-recovery and T2-weighted fast spin-echo magnetic resonance (MR) images by using a saline bag model of the kidney. MATERIALS AND METHODS: Normal-saline bags containing gadopentetate dimeglumine in concentrations of 0-20…
The standard Gibbs energies of formation of RuO 2 and OsO 2 at high temperature have been determined with high precision, using a novel apparatus that incorporates a buffer electrode between the reference and working electrodes. The buffer electrode absorbs the electrochemical flux of oxygen through the solid electrol…
The impact response of laminated composites consisting of alternate layers of Al alloy foam and Al2O3 was studied experimentally in low and intermediate velocity regimes. Low velocity impacts (1.2–2.8 m s-1) were conducted using an instrumented falling weight apparatus and were compared with static indentation tests (…
The oxidation kinetics of CVD SiC were measured by thermogravimetric analysis (TGA) in a 4H 2 ·12H 2 O·10CO·7CO 2 ·67N 2 gas mixture flowing at 0.44 cm/s at temperatures between 1300° and 1450°C in fused quartz furnace tubes at 1 atm total pressure. The SiC was oxidized to form solid SiO 2 . At ≥1350°C, the SiO 2 was…
Cotton fabric is treated in different concentrations of BTCA and SHP solutions. The fabric weight gain is confirmed by FTIR analysis, and the peak ratio of 1720 cm -1 /1380 cm -1 has a good linear relation with fabric weight gain. The results show that BTCA is most effective for durable press finishing at around 2%. T…
The charge-density-wave (CDW) structure of the monophosphate tungsten bronze ${\mathrm{P}}_{4}{\mathrm{W}}_{20}{\mathrm{O}}_{68},$ the $m=10$ member of the ${(\mathrm{P}\mathrm{O}}_{2}{)}_{4}{(\mathrm{W}\mathrm{O}}_{3}{)}_{2m}$ series has been solved at room temperature from single-crystal x-ray-diffraction data. In a…
Variable temperature x-ray diffraction and differential scanning calorimetry experiments on the superlattice solids of alkanethiol protected silver nanoclusters show that the translational periodicity collapses around 398 K resulting in a liquid phase, which upon cooling, reverts into the parent crystalline phase. Thi…
Sorption of phosphate in the presence of low molecular mass organic ligands on hydroxy‐Al–organics coprecipitates may be the rule and not the exception in rhizospheric soils. We studied the competitive sorption of phosphate and tartrate on hydroxy‐Al–oxalate precipitates obtained by coprecipitating Al and oxalate at p…
Human vascular endothelial growth factors (VEGF) are angiogenic factors that induce specific endothelial cell proliferation. In this study, VEGF165, which contains 165 amino acids, was immobilized onto poly(acrylic acid) grafted polyethylene) films (PAAc-g-PE). VEGF165 was immobilized via a reaction between the amino…
The functional complementation of two Escherichia coli strains defective in the succinylase pathway of meso-diaminopimelate (meso-DAP) biosynthesis with a Bordetella pertussis gene library resulted in the isolation of a putative dap operon containing three open reading frames (ORFs). In line with the successful comple…
The results of the search for dopants to optimize the ferroelectric phase transition temperature and pyroelectric and piezoelectric properties of Sn(2)P(2)S(6) crystals are reported. Among all dopants only germanium causes a pronounced shift of the phase transition toward higher temperatures. The highest Curie tempera…
Crude oil fouling in a laboratory fouling unit was investigated. The study focused on the preheat-train heat exchangers located just before the crude unit furnace and operating at temperatures in excess of 200C. A fouling rate model developed using laboratory data from crude blends was used to predict the threshold co…
Specific heat and magnetoresistance of the organic superconductor $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{Cu}[\mathrm{N}(\mathrm{CN}{)}_{2}]\mathrm{Br}$ were measured simultaneously at temperatures near the superconducting transition. The magnetic field was aligned exac…
A method is presented to compute the eddy current losses in laminated nonsaturated iron cores based on the finite element method. In the first step, a three-dimensional model of the core treated as a bulk of anisotropic material with low conductivity in the direction normal to the lamination is analyzed. Each laminate…
A new procedure for chemical modification of poly(vinyl alcohol) (PVA) was established by a glycosidation reaction of hydroxyl groups in PVA with triacetylated sugar oxazoline 1. 1H and 13C NMR analyses indicated that triacetylated N-acetyl-D-glucosamine (GlcNAc) was introduced onto a PVA backbone selectively via a β-…
Three different fluoro-terminated hyperbranched poly(ether ketone)s (FHBPEKs) with variable degrees of branching and their linear analogous poly(ether ketone) (LPEK) whose chemical structure and molecular weight were similar to those of the FHBPEKs were synthesized. Cyano-terminated hyperbranched poly(ether ketone), C…
We have prepared two series of dimeric compounds, which comprise the schiff's base mesogen, alkyl spacer with the carbon number of 5 and alkyl or alkoxy tail with the carbon number of m = 4∼16. In these compounds, we observed three types of smectic liquid crystals, the single layer phase with the tail group randomly m…
Many authors have suggested new forms to describe the surface anchoring energy of the liquid crystal-wall interface, replacing the Rapini-Papoular (RP) formula g s = (1/2) A sin2 theta. If the RP function is considered as the primary approximation, and a lowest order modification is included, then the surface anchorin…
Abstract In vulcanization, chemical crosslinks are formed across elastomeric polymer chains improving both the strength and elastic properties of the rubber. An understanding of the formation, structure, and stability of vulcanizates is therefore very important. Solid-state NMR and NMR imaging have been effective meth…