Materials Literature
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Functionalization and multiplication of porphyrins by transition metal-mediated reactions (Sonogashira coupling, Negishi coupling, Stille coupling, Mizoroki-Heck alkenylation, Buchwald-Hartwig reaction, Suzuki-Miyaura coupling, cobalt-mediated [2+2+2] cyclization, Grubbs' metathesis reaction, etc.) are reviewed. When…
The improvement of the dielectric strength of SF6 insulated systems by using a thin dielectric coating to change the surface state of electrodes was studied. The paper deals with the breakdown probability of a coaxial aluminium electrode arrangement with different surface roughness in pressurized SF6. Thin epoxy resin…
A new, low-cost, enhanced pulsed-DC PACVD deposition system was designed and tested to evaluate its capacity to produce quality DLC films. The main focus of the study was to attain DLC films with low friction coefficients, low total stress, a high degree of hardness, and very good adherence to the substrates on deposi…
2,6-Pyridinediylbisalkanamides were synthesized, using diaminopyridine (DAP) as a linker and alkyl chains of varying lengths, that upon self-assembly form submicron-sized sheets and their uptake into the cytoplasm of HeLa cells was studied by confocal microscopy.
The anti-inflammatory effect of seed powder [SPP I (100 mg/kg) and II (200 mg/kg) p.o.] and aqueous extract [SPE I (100 mg/kg) and II (200 mg/kg) p.o.] of Strychnos potatorum. Linn (Loganiaceae) seeds was studied in carrageenin-induced hind paw edema and cotton pellet granuloma models. In carrageenin-induced rat paw e…
A new polymer composite material and textile product has been developed. The main constituents of this composite are thermoplastic polymer and embedded carbonyl iron powder. Through an extrusion process, endless flexible fibers having diameters of 200 and 500 mm have been produced. The fibers show a very high degree o…
The Al–Cu–Fe quasicrystal (QC) has been shown to reveal high catalytic activity and thermal stability for steam reforming of methanol (SRM: CH3OH + H2O → 3H2 + CO2), after leaching with NaOH aqueous solution. To investigate the origin of the high catalytic performance, cross-sectional transmission electron microscopy…
The effect of wood flour (WF) on curing behavior and swelling properties of polyisoprene rubber/chlorosulphonated polyethylene (NR/CSM) rubber blends was investigated. The mechanical properties, as well as the equilibrium swelling characteristics of the elastomeric composites filled with WF (particle size from 300 to…
To clarify the thermoelectric properties of the layered cobalt oxide Ca3Co4O9 epitaxial film fabricated by the topotactic ion-exchange method [K. Sugiura et al., Appl. Phys. Lett. 89, 032111 (2006)], the electrical resistivity (ρ), Hall coefficient (RH), and Seebeck coefficient (S) of high quality Ca3Co4O9 epitaxial f…
Influence of TiO2 and ZnO oxides has been investigated elaborately on the conductivity and dielectric properties of unconventional and technologically important 40CuO–40Bi2O3–20X (where X=TiO2 and ZnO) glasses. The dc electrical conductivity of ZnO containing glass is found to be higher than that of TiO2 containing on…
By using a hybrid diffractive and refractive achromat with extended depth of focus, we have successfully recorded a micro-hologram array with diffraction-limited individual spot size maintained throughout the thickness of recording medium. An electrically programmable wavelength combiner was constructed in which a whi…
For bulk processing of carbon nanotubes, an important first step in adhesion to the nanotubes is often liquid-phase functionalization through chemical oxidation with acids (e.g., nitric and sulfuric), peroxides and/or potassium permanganate. In comparison, gas-phase photo-oxidation can be an alternative to introduce o…
We investigated characteristics of the corrosion of stainless steel specimens by bacteria and the effects of using antimicrobial coating on the surface for inhibiting corrosion. Bacillus sp. 2-A and Staphylococcus sp. 2-1 cells adhered tightly to a stainless steel SUS304 specimen, formed a microcolony or biofilm, and…
Optical near-fields, which appear in the vicinity of structures when irradiated with light, exhibit a hierarchical nature, meaning that the degree of localization of optical near-fields at a given point is related to the scale of the structure involved in this process. Therefore, if we could make optically induced fab…
Ethyl xanthate adsorption on metallic lead was studied by X-ray photoelectron spectroscopy (XPS) after treatment of lead sample at different potentials in aqueous NaNO3 solutions containing ethyl xanthate. Continuous increase of the amount of ethyl xanthate species on the lead surface was observed as the potential was…
The Korea-United States Free Trade Agreement (KORUS FTA) opens up substantial new opportunities for bilateral trade and investment in goods and services and promotes important foreign policy interests of both countries. The FTA quickly removes most tariff barriers to auto trade and substantially reduces tax and regula…
We present a mesoscopic model able to capture the physics of drops moving across patterned surfaces. In this model, interfaces appear naturally, and both chemical and topological patterning can be incorporated with relative ease, making it particularly suitable to study the behaviour of evolving drops. We summarise re…
To improve the delayed fracture strength of ultra high-strength low alloy TRIP-aided steels with bainitic ferrite matrix (TBF steels), the effects of aluminum content on hydrogen absorption behavior and delayed fracture properties of 0.2%C-0.5∼1.5%Si-1.5%Mn TBF steel were investigated. When aluminum was added to the T…
Immiscible blends of recycled high density polyethylene (HDPE) and polyethylene terephthalate (PET) were compatibilized with maleic anhydride grafted polyethylene (PE-g-MA). The effect of the compatibilizer content on the mechanical, morphological, rheological, and thermal properties of recycled HDPE/PET blends was in…
Magnetostrictive materials display large force and displacement in response to an applied field, as well as short response time. However, their nonlinear and hysteretic behavior has hindered their use. We prove, using the physics of the material, that these materials are passive. The corresponding energy storage funct…