Materials Literature
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The present work is concerned with the mathematical formulation of the boundary value problem of dislocation dynamics. The boundary conditions for the elastic and dislocation fields are derived for two cases which are currently treated by dislocation dynamics simulation models. In the first case, the crystal space und…
The novel oxonitridoaluminosilicates (sialons) Sr3Ln10Si18Al12O18N36 (Ln = Ce, Pr, Nd) were obtained by the reaction of the respective lanthanide metals with Si(NH)2, SrCO3, and AlN using a radiofrequency furnace at temperatures between 1550–1650 °C. The crystal structures of the isotypic sialons were determined by si…
The adsorption of CO(g) on a Co/γ-Al2O3 catalyst has been studied by diffuse reflectance infrared spectroscopy. The effects of pressure, temperature and the addition of O2(g) and H2(g) have been investigated. Vibrational bands can be assigned to specific carbonyl species on the reduced Co catalyst, at low surface conc…
Nowadays, waste tires are a significant problem with the increasing in the number of automobiles. Therefore, much research has been performed in this field. From environmental and economical perspectives, recycling is one of the popular methods for the treatment of waste tire. However, it is not easy to melt down and…
The details of a new all-atom force field designed to reproduce the phases of the native I-α and I-β forms found in crystalline cellulose I are reported in this article. The energy differences, densities, unit cell parameters, and moduli are in close agreement with experimental evidence. Analyses of the modular dynami…
Gas solubilities and polymer swelling in propylene and semicrystalline polypropylene system at temperatures of 323.2 and 348.2 K and pressures up to propylene's vapor pressure were measured. Pressure, specific volume, and temperature (PVT) measurements of polypropylene were carried out at temperatures from 313 to 573…
Extended X-ray absorption fine structure (EXAFS) measurements have been performed on Er31 in silicate, borate, and phosphate glasses in order to investigate the local structure surrounding the Er31.Er31 ions coordinate to non-bridging oxygen ion sites, where alkali or alkaline earth ions terminate the network structur…
Experiments have shown that Ge3N4 is a promising material for application in photodiodes, amplifiers, optic fibers, protective coatings, etc., and several experimental studies have been carried out on this material, however, only one theoretical study has been reported in the literature about β-Ge3N4. In this work we…
Complex formation of nimesulide (N) and beta-cyclodextrin (beta CD) in aqueous solution and in solid state and the possibility of improving the solubility and dissolution rate of nimesulide via complexation with beta CD were investigated. Phase solubility studies indicated the formation of a 1:1 complex in solution. T…
The crystallization of a series of low-density polyethylene (LDPE)- and linear low-density polyethylene (LLDPE)-rich blends was examined using differential scanning calorimetry (DSC). DSC analysis after continuous slow cooling showed a broadening of the LLDPE melt peak and subsequent increase in the area of a second l…
Catalyzed Ring-Opening Polymerization (ROP) of lactones, such as ε-caprolactone and δ-valerolactone, has been investigated for preparing aliphatic polyester-grafted corn starch compositions. The polymerization has been carried out either in bulk (without solvent) or in 10 wt% granular starch in toluene suspension, aft…
The neutral V center in MgO bulk and at its (001) surface has been characterized theoretically using a periodic supercell model and an embedded-cluster approach, both based on the Hartree–Fock approximation. The two methods give essentially the same description of the electronic structure and energetics of the defect.…
Dense ceramics were prepared using the spark‐plasma sintering (SPS) method. The starting powder (0.2 μm) was densified to ca. 97% of the theoretical X‐ray density with much shorter sintering period (5 min) while preserving a grain size similar to that of the starting powder. The sintering temperature in the SPS proces…
Attenuated total reflection (ATR), also known as internal reflection spectroscopy (IRS), is a forensically accepted method for infrared (IR) analysis of pressure sensitive adhesive tapes. Advancements of ATR accessories in the last decade have provided the forensic examiner several ATR methods to choose from. These ac…
This paper describes a new approach for transformer differential protection that ensures security for external faults, inrush, and overexcitation conditions and provides dependability for internal faults. This approach combines harmonic restraint and blocking methods with a wave shape recognition technique. First, we…
The magnetic material's deformation caused by magnetostriction is represented by an equivalent set of mechanical forces, giving the same deformation to the material as magnetostriction does. This is done in a way similar to how thermal stresses are usually incorporated. The resulting magnetostriction force distributio…
We have synthesized a number of new achiral and chiral triphenylene derivatives bearing laterally substituted phenylene units in the side chains. Their polymorphism includes the first reported discotic blue phase of a pure compound and a ferroelectrically switchable columnar mesophase.
Osteocalcin is one of the most abundant noncollagenous proteins in bone. It is strongly associated with the mineral phase of bone, and has long been associated as a marker of bone turnover. However, its relationship to bone composition, strength, and structure is unclear. Carp rib bone is an excellent model for the st…
Pheophorbide a (Pheo) is a well-known hydrophobic photosensitizer used for photodynamic treatment of various diseases. The influence of the surroundings on the electronic properties of photosensitizers mainly accumulating in membrane structures is of relevance for their photoactivity. In this paper the current knowled…
A new synthetic route is reported for the synthesis and covalent bonding of electrically conductive polypyrrole to a poly(ethylene terephthalate) fabric. It involves a three-step process including surface phosphorylation and graft polymerization from the gaseous phase. In the first step, the fibre surfaces are activat…