Materials Literature
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Ti/Si/TiC powder mixture with molar ratios of 2: 2: 3 were sintered at various temperatures from 700–1300 °C for 15 min by PDS technique. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for the evaluation of phase composition in different samples for the understanding of the sintering mechanis…
The thermally induced cationic polymerization of 1,6-anhydro-β- d -mannopyranose ( 1 ) as a latent cyclic AB 4 -type monomer was carried out using 2-butenyltetramethylenesulfonium hexafluoroantimonate ( 2 ) as the initiator. The solution polymerization in propylene carbonate proceeded without gelation to produce the w…
Abstract Compatibilized blends of thermoplastic polyurethane (TPU) and polypropylene (PP) were developed using amine (primary or secondary) functionalized PP's (PP‐g‐NH 2 or PP‐g‐NHR). The strategy of reactive compatibilization is based on fast reactions between amine functional groups and urethane linkages or traces…
The structure and bonding in [TeM 6 O 24 ] 6- (Anderson) and [PM 12 O 40 ] 3- (α-Keggin) heteropolyanions have been investigated by density-functional methods. Various molecular-orbital and population approaches have been employed in the analysis of the structural and electronic properties. Good agreement between comp…
An analytical expression is derived for the tilt introduced into a wave front by a Dove prism with manufacturing errors in the prism's base angles and pyramidal angle. We found that the tilt decreases when the base angles are increased above the values of traditional design. The increase in the length-aperture ratio o…
The bioassay-guided fractionation of the n-BuOH extract of Abeliophyllum distichum afforded acteoside (1), isoacteoside (2), rutin (3), and hirsutrin (4). Compounds 1-3 moderately inhibited the angiotensin I converting enzyme activity in a dose-dependent manner. Compounds 1-3 showed the 50% inhibitory concentration va…
Summary In oil and gas production operations, precipitation of mineral scales causes many problems, such as formation damage, production losses, increased workovers in both producers and injectors, poor injection-water quality, and equipment failures caused by underdeposit corrosion. The most common mineral scales are…
The density functional theory has been applied to study the interaction of platinum (atoms, dimers, and layers with equal number of platinum atoms as oxygen surface atoms) with the (100) surfaces of MgO and BaO. The systems are characterized with respect to preferred geometrical configurations and electronic structure…
Abstract The directional crystallization of crystallizable organic solvents and the subsequent epitaxial crystallization of crystalline blocks onto the surface of crystalline substrates in semicrystalline block copolymers, control both molecular chain orientation of the crystalline block and the microdomain structure…
Aeromonas caviae R-specific enoyl-coenzyme A (enoyl-CoA) hydratase (PhaJ(Ac)) is capable of providing (R)-3-hydroxyacyl-CoA with a chain length of four to six carbon atoms from the fatty acid beta-oxidation pathway for polyhydroxyalkanoate (PHA) synthesis. In this study, amino acid substitutions were introduced into P…
Fatigue behavior of four ceramic‐matrix composites (CMCs) was documented at 1000°C, and a fifth composite was documented at 1200°C. Additional fatigue specimens were cycled for set blocks of cycles, removed from the fatigue machine, and exposed in a cyclic corrosion tester for 24 h with a fog of deionized water and a…
Summary Frost damage to potatoes, grapevine and citrus plants was assessed following treatment with either an acrylic polymer (Antistress™) or with a hydrophobic particle film (CM‐96–018). In large freezing tests, the application of the hydrophobic particle film consistently led to less damage whilst the acrylic polym…
We investigated the local density of states (LDOS) of extended individual metallic single-walled carbon nanotubes using low-temperature scanning tunneling spectroscopy. We observed that the LDOS oscillates with energy close to the Fermi level. The oscillation period of about 50 meV varies with position on the nanotube…
Intratumoral injection of controlled-release microsphere formulations of anticancer compounds has the potential to selectively increase tumour exposure to drugs. This work aimed to evaluate the therapeutic effect and toxicity of microsphere formulations containing the anticancer drug, doxorubicin, in a murine tumour m…
Coir composites had been prepared using coir fiber (both continuous and short fiber) as reinforcement with both thermosetting and thermoplastics as matrices. The composite specimens were prepared using both untreated and chemically modified such as defatted, PMMA grafted, PAN grafted and cyanoethylated coir fibers. Co…
Abstract The chemical and structural properties of Mg smectites in the Vicálvaro sepiolite deposit have been studied in detail. The characterization was performed on different size-fractions of selected smectitic samples (5−2 µm; 2−1 µm; 1−0.5 µm; <0.5 µm and <0.1 µm). The chemical compositions of individual par…
Abstract A series of titanium silicate glasses along the composition joins TiO 2 -SiO 2 , TiO 2 -Na 2 SiO 3 , TiO 2 -K 2 SiO 3 and TiO 2 -CaSiO 3 , has been examined using oxygen K -edge X-ray absorption near edge structure spectroscopy (XANES) confined to the near-surface region. Sharp pre-edge features in the spectr…
Using a first-principles plane-wave pseudopotential method, the geometric and electronic structures of ${\mathrm{Ti}}_{2}\mathrm{Al}X$ $(X=V,$ Nb, or Ta) are investigated. The supercells of ${\mathrm{Ti}}_{2}\mathrm{Al}X$ are constructed by replacing certain Ti atoms in ${\ensuremath{\alpha}}_{2}\ensuremath{-}{\mathrm…
The flux of fatty acids toward beta-oxidation was analyzed in Saccharomyces cerevisiae by monitoring polyhydroxyalkanoate synthesis in the peroxisome from the polymerization, by a bacterial polyhydroxyalkanoate synthase, of the beta-oxidation intermediates 3-hydroxyacyl-CoAs. Synthesis of polyhydroxyalkanoate was depe…
The untreated and 2%aqueous NaOH treated bamboo fibers (Dendrocalamus strictus) were coated with epoxy, unsaturated polyester (UP) and their blends. The chemical resistance of these fibers to acetic acid, nitric acid, hydrochloric acid, sodium hydroxide, ammonium hydroxide, sodium carbonate, benzene, toluene, carbon t…