Materials Literature
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In a recent work (Buscarino et al 2009 Phys. Rev. B 80 094202), by studying the properties of the (29)Si hyperfine structure of the E'(γ) point defect, we have proposed a model able to describe quantitatively the densification process taking place upon electron irradiation in amorphous SiO(2) (a-SiO(2)). In particular…
Poly ( l -lactic acid) (PLLA) is a biobased polymer, and poly(trimethylene terephthalate) (PTT) is a semibiobased polymer. However, PLLA is biodegradable, and PTT is not. In this paper, their copolymers (PTHT−PLLA) are synthesized via chain-extension reaction of hydroxyl terminated poly(trimethylene- co -hexamethylene…
A novel egg-shell Pd/PHSNs nano-catalyst was prepared by a wet impregnation method using self-synthesized porous hollow silica nanoparticles (PHSNs) as support and applied in selective hydrogenation of acetylene to remove acetylene from the ethylene feed. By controlling the preparing conditions and calcining temperatu…
Ultrathin BiOCl nanoflakes, nanoplate arrays, and curved nanoplates have been successfully synthesized via an ionothermal synthetic route by using an ionic liquid 1-hexadecyl-3-methylimidazolium chloride ([C<sub>16</sub>Mim]Cl) as “all-in-one” solvent, simply adjusting reaction temperature. The samples are…
Kinetics mechanisms with two independent sites are proposed for the adsorption steps of CH 4 and O 2 in the CH 4 −O 2 reaction on an oxidized metal, assuming noncompetitive adsorption of the reactants in agreement with the experimental observations. This condition cannot be incorporated in the previous models with a s…
Major repair or regular inspection of the large capacity thin‐walled tankages is very expensive. Steel cylindrical tanks are an individual case of the thin‐walled tankages. The common calculation of the tanks by analytical and numerical methods is not difficult. Strengthening the places, where a perfect calculated for…
In this article, we have synthesized two new heteropolytungstate-based compounds [EMIM]4[SiW12O40] (1) and [EMIM]6[P2W18O62] · 4H2O (2) using the ionic liquid (IL) [EMIM]Br (EMIM = 1-ethyl-3-methylimidazolium) as a solvent and characterized them by infrared (IR) and ultraviolet (UV) spectra, thermogravimetric (TG) and…
Hydrogen isotope effects on geometries, total energies, nuclear and electronic wave functions of the [HO3SO–H–OSO3H]− and [KO3SO–H–OSO3K]− complexes are investigated with the NEO/HF method. This method determines both electronic and nuclear wave function simultaneously. A discussion of the isotope effects is provided…
We have examined steady-state and time-resolved luminescence properties of CdS:Te quantum dots (QDs). The transient emission spectra have a red shift along the emission process. Using singular value decomposition and multiexponential decay analysis, the luminescence is found to originate from two distinct and parallel…
The unmodified clay has been fully exfoliated in epoxy resin with the aid of a novel ultrafine full-vulcanized powdered rubber. Epoxy/rubber/clay nanocomposites with exfoliated morphology have been successfully prepared. The microstructures of the nanocomposites were characterized by means of X-ray diffraction and tra…
The immobilization of albumin and lysozyme by spontaneous adsorption on ZnO films, deposited by metal-organic chemical vapour deposition (MOCVD), has been investigated. Quartz crystal microbalance with dissipation monitoring and X-ray photoelectron spectroscopy analyses show that, at physiological pH, the two proteins…
Variable-pressure deuterium nuclear magnetic resonance ((2)H NMR) has been used to study the pressure-temperature phase diagram of bicellar mixtures containing 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC). Spectra were obtained for DMPC-d(54)/DHPC (3:1), DMPC…
Abstract The rare earth compound, scandium trifluoromethanesulfonate [Sc(OTf) 3 ], has been used as a water‐tolerant catalyst for the synthesis of star‐shaped poly(ε‐caprolactone)s (SPCLs) with trimethylol propane as trifunctional initiator in solvent at 40°C. Triarm SPCLs have been successfully prepared. The molar ma…
The influence of local magnetic moment formation around three kinds of vacancies on the electron conduction through metallic single-wall carbon nanotubes is studied by use of the Landauer formalism within the coherent regime. The method is based on the single-band tight-binding Hamiltonian, a surface Green function ca…
Yeast Saccharomyces (Lachancea) kluyveri urc4 mutants, unable to grow on uracil, biotransformed (14)C(2)-uracil into two labeled compounds, as detected by high performance liquid chromatography (HPLC). These two compounds could also be obtained following organic synthesis of ribosylurea. This finding demonstrates that…
We have performed static magnetic susceptibility and ESR measurements on the X-ray-irradiated organic Mott insulator κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Cl. The Néel temperature and the spin-flop transition field decrease with increasing irradiation dose. In the ESR signal at 4 K, a paramagnetic component (∼15%) from itinerant…
ONIOM calculations have been carried out to determine geometries, adsorption energies, and vibrational frequencies of CO on a model for Au-exchanged mordenite catalysts, Au/MOR. The CO-calculated vibrational frequencies (upsilon(CO)) are in good agreement with the reported experimental values. We proposed to interpret…
Abstract Natural rubber with low heat generation was prepared by the inclusion of boron carbide (B 4 C). Tensile testing, scanning electron microscopy (SEM), dynamic mechanical analysis, and thermal constant analysis were performed. The results show that a slight deterioration of tensile strength only occurred at a hi…
Abstract A terpolymer resin was synthesized by the condensation of 2,2′‐dihydroxybiphenyl with guanidine and formaldehyde in the presence of 2 M HCl as a catalyst. The resin obtained was characterized on the basis of elemental analysis, infrared spectroscopy, NMR spectroscopy, ultraviolet–visible spectroscopy, and the…
An efficient energy management of a building requires optimum use of the light energy, which is strongly dependent on optical properties of used materials. In the lighting sector, aluminium is generally employed as substrate for the reflectors. Nowadays, new steel substrates combining good corrosion resistance and fle…