Materials Literature
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Resumen es: En la region de Magallanes Norte entre el golfo de Penas y boca Occidental del estrecho de Magallanes los fosfatos, nitratos, temperatura y profundida...
The use of biofibres as reinforcing agents for composite materials is one of the most promising areas of composite development, but the handicap of their hydrophilic nature has to be resolved to ensure stable composites. This article concerns the effectiveness of chemical modification using fatty acid derivates follow…
The solidification structure of remelt ingots of IN718 has been modeled by many authors using a number of different computation techniques.The models have generally been validated by comparing the computed liquidus line with the "pool profile" as outlined by a variety of techniques in industrial ingots.Recent models h…
The higher-order resonant modes of a new artificial magnetic particle — metasolenoid — are characterized and the dependency of the resonant frequencies on the dimensions of the metasolenod are studied both analytically and numerically. The study is relevant to the design of new artificial magnetic materials, slow-wave…
In this paper, we discussed recent studies done in our laboratories with a floating catalyst chemical vapor deposition (CVD) method. We can grow single- or double-walled carbon nanotubes (SWNTs/DWNTs) with different kinds of catalysts. Single-walled carbon nanotubes without amorphous carbon coating were prepared by th…
A series of high-vacuum thermolysis experiments with alkyldithio thiadiazoles was performed between ambient temperature and 900 degrees C to investigate the thermal stability of thiadiazole type lubricant additives. The thermolysis products were trapped by matrix-isolation techniques and characterized by IR spectrosco…
An electrothermal vaporization-inductively coupled plasma atomic emission spectrometric (ETV-ICP-AES) method was developed for rapid determination of binder and lattice phase aluminium in liquid-phase sintered silicon carbide (LPS-SiC) materials. By means of thermal fractionation the binder and the lattice phase alumi…
We have identified an efficient photochemical transformation involving the reaction of a [1,3]oxazine with tertiary amines. In aerated acetonitrile, the process is accompanied by the appearance of an intense absorption in the visible region. The irreversible formation of 4-nitrophenolate chromophores is responsible fo…
Synthesis of dendrimers with enones as the core unit and m-terphenyl as surface end group has been achieved. All the enones and the dendrimers were antibacterial against Salmonella typhi, Salmonella paratyphi and Staphylococcus aureus.
アルミ再生工程から排出されるアルミドロスおよびMgCl2廃液を用いて，無機陰イオン交換体であるハイドロタルサイト（以下，HT）の合成を行った．得られたCO32−型HTおよびその焼成物を用いて，水溶液中で陰イオン種を形成するAs(III), As(V), Se(IV)およびCr(VI)の除去を行った．CO32−型HTおよびその773 Kでの焼成物によるAs(III)の除去量は，HT焼成物を用いる方がCO32−型HTよりも高い．As(V)の場合，焼成物とCO32−型HTとの間にAs(V)除去率の大きな差は見られない．ヒ素の場合と同様に，CO32−型HTおよび焼成物を用いたSe(IV)およびCr(VI)の除去が可能である．HT焼成物によ…
Les traitements cosmétiques des cheveux comme la décoloration et la coloration (utilisation de peroxyde d'hydrogène), les produits pour la permanente et le lissage (utilisation de thioglycoïlate d'ammonium suivi de peroxyde d'hydrogène) diminuent la concentration originelle de drogues dans les cheveux. Ces traitements…
The modification and dispersion of nano‐silica particles were investigated by Fourier transform infrared spectroscopy (FTIR), 29Si CP MAS NMR, thermogravimetric analysis (TGA), Raman spectroscopy, N4Plus particle size analyzer, transmission electron microscopy (TEM), and dynamic mechanical analyzer (DMA) using methacr…
The correlation between the pore structure of monolithic nanoporous glassy carbons (NPGCs) and their double-layer capacitance in KOH-aqueous electrolyte was investigated. The results obtained show that, in general, capacitance increases with surface area. However, the capacitance for NPGCs with high conductivity stron…
The corrosion behavior of pure copper rotating cylinder electrode (RCE) exposed to 3% NaCl or artificial seawater prepared as Vätäänen nine salt solution (VNSS) has been studied using electrochemical impedance spectroscopy (EIS) and polarization techniques. EIS experiments for copper RCE were carried out at different…
In this contribution the formation of nanostructures consisting of two differently sized nanoparticles is reported which is a crucial step towards the directed preparation of functional devices as the presented technique not only allows for the use of a wide range of materials but also combines site-specificity with t…
The equilibrium conductivity and chemical diffusivity of Al-doped, single-crystalline BaTiO3 [C. R. Song and H. I. Yoo, J. Am. Ceram. Soc., 2000, 83, 773] have been re-analyzed by taking account of possible hole-trapping by acceptor-dopants (Al) with reference to the data on undoped BaTiO3 [C. R. Song and H. I. Yoo, P…
PVC is the most common insulation material used for wiring in low-voltage (LV) service. “Low-voltage,” in the context of this paper, is taken to be 120 – 240 VAC. “Wiring” is taken to include not only insulated wires, cables, or cords, but also the appurtenant termination devices, e.g., male plugs or female taps. Well…
Highly toughened nickel dispersed alumina-based nanocomposites were fabricated using our developed soaking method, based on our previously proposed toughening mechanism of nanocomposites. Commercially available γ-alumina agglomerate with high porosity was used as a starting material. Nickel nitrate solution was penetr…
This paper describes a convenient and efficient synthesis of new pentafluoro-λ6-sulfanyl-containing 1,3-, 1,4- and 1,5-alkadienes and their epoxidation. These compounds are useful as monomers or as intermediates in the preparation of polymers, polymer surface coating and SF5-containing heterocyclic compounds.
β-type titanium alloys consisting of non-toxic elements, Ti-8Fe-8Ta, Ti-8Fe-8Ta-4Zr, and Ti-10Fe-10Ta-4Zr, were newly designed and developed for biomedical applications. Changes in the mechanical properties of the designed alloys with various heat treatments were discussed on the basis of the resultant microstructures…