Materials Literature
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In the present work, the electrical and mechanical properties of epoxy nanocomposite materials were studied. The hydrophobicity of the insulating material was analyzed through contact angle measurement. The diffusion coefficients of the material with different percentage of clay in epoxy nanocomposites were calculated…
BACKGROUND: Polyhydroxyalkanoates (PHA), are biodegradable polyesters derived from many microorganisms such as the pseudomonads. These polyesters are in great demand especially in the packaging industries, the medical line as well as the paint industries. The enzyme responsible in catalyzing the formation of PHA is PH…
Investigation of material behaviour under extremely high pressures and temperatures using IR laser-heated diamond anvil cells (DACs) has emerged in the recent years as an important area of research, both basic and applied. This article presents details of a laser-heated DAC facility that we have recently set up at our…
A committee at Japan Power Engineering and Inspection Corporation was organized to evaluate long-term creep strength and to review current allowable tensile stress of creep strength enhanced ferritic steels. In FY2005, allowable tensile stresses of KA-STPA29 type steels (ASME Gr.92), KA-STPA24J1 type steels (ASME Gr.2…
The aim of this study was to use magnetic resonance (MR) techniques to non-invasively compare the effects of the three leading vascular disrupting agents, namely combretastatin A-4 disodium phosphate (CA4DP), 5,6-dimethylxanthenone-4-acetic acid (DMXAA) and ZD6126. A C3H mouse mammary carcinoma grown in the right rear…
The aim of this study was to investigate the use of thermotropic liquid crystalline (TLC) blends of 4-pentyl-4'-cyanobiphenyl (K15) and 4-heptyl-4'-cyanobiphenyl (K21) with appropriate nematic to isotropic phase temperature (Tn - i) just above body temperature as a temperature-modulated drug permeation system. Using d…
Abstract Zero‐field susceptibility and specific heat of Pb[Cu(SO 4 )(OH) 2 ] (linarite) single crystal were measured. In order to verify that linarite is a quasi‐one‐dimensional system with competing nearest‐neighbour and next‐nearest‐neighbour in‐chain exchange interaction ( J 1 ≈ –30 K, J 2 ≈ 15 K), theoretical resu…
The X-ray structure is reported of a diprotonated Gd(III) tetra-aqua complex of the ligand 1,4,7,10-tetrakis(carbamoylmethyl)-1,4,7,10-tetraazacyclododecane (DOTAM), a thermodynamic intermediate in metal ion association and dissociation pathways.
The synthesis of a series of open U-shaped bis-porphyrin cavity molecules is described, with bridged bicyclic backbones to confer rigidity, and a pendant substituted aromatic probe unit suspended on the inside of the cavity. The dimensions and flexibility of the bis-zincporphyrin cavity were probed using several diffe…
The plasma-wet chemical hybrid process for NOx removal from the flue gas emissions is extremely effective and economical in comparison with the conventional selective catalytic reduction system. A series of experiments using the plasma-wet chemical hybrid system are performed to control NOx from the diesel engine emis…
Syntheses of hydrotalcite-like materials (HT), functional inorganic materials having layered structure of complex hydroxide, were carried out using aluminum dross, white dust and waste solution containing Mg in an aluminum regeneration process as a raw material. The removal of toxic anions such as As(III) and As(V) we…
The relationship between microstructure and electrochemical performance was investigated in sputter-deposited thin-film cathodes. As-deposited and heat-treated films in unlithiated and lithiated states were studied by transmission electron microscopy, X-ray diffraction, and secondary ion mass spectroscopy. Film proper…
Growth of CdS:Cu Nanocrystals by Chemical Synthesis, Portillo-Moreno, O., Lima-Lima, H., Ramírez-Falcon, V., Martínez-Juárez, J., Juárez-Díaz, G., Lozada-Morales, R., Rebollo-Plata, B., Palomino-Merino, R., Soto, A. B., Zelaya-Angel, O.
A magnetic field has a lot of useful functions. We focus on two of these functions. The first one is alignment of crystals with magnetic anisotropy. We aligned hydroxyapatite crystals and graphite whiskers during slip casting process under the imposition of the high magnetic field. In the case of the hydroxyapatite cr…
The available EPR data on binuclear copper(II) complexes with aliphatic hydrocarbon spacers are surveyed. The mechanisms responsible for exchange coupling in these spacered dimers are considered.
Solid state and solution chemistry of a supramolecular system, a sodium complex with ligands of tetrathiafulvalene (TTF) dicarboxylate and benzotriazole molecules, have been studied. The well characterized host–guest response in H2O–CH3CN (1 ∶ 1 v/v) was monitored by electronic spectra and cyclic voltammetry. The host…
Hemp, jute, flax, bagasse, coconut and bamboo fibers are some of the natural fibers that have attracted attention for the preparation of composite materials because of their low cost compared with synthetics fibers (glass, carbon). The performance of a natural fiber as reinforcement in composite materials is linked to…
The specific features of the “incommensurate-commensurate” phase transitions induced by a magnetic field in multiferroics (materials with coexisting magnetic and electric ordering) are considered. These materials are ferroelectromagnets, for example, bismuth ferrite BiFeO 3 and BiFeO 3 -based compounds, which have spa…
A plasma-enhanced chemical-vapor deposition process was employed to synthesize carbon nanofibers (CNFs) on glass substrates patterned with Ni catalytic films. At the gas pressure of 20mTorr and the substrate temperature (surface) of ∼500°C, the isolated and vertically aligned carbon nanofibers have been successfully s…
We compare Raman and infrared spectra of the nuOH/OD modes in benzoic acid crystal powders at 7 K. The extremely sharp Raman bands contrast to the broad infrared profiles and suggest adiabatic separation of hydrogen (deuterium) dynamics from the crystal lattice. There is no evidence of any proton-proton coupling term.…