Materials Literature
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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…
Reactions between Te, TeO2, TeCl4, TeO3 or H6TeO6 and 30–95 wt% H2SO4 were studied at temperatures up to the boiling point of the acid. Depending on the tellurium-containing reactant, H2SO4 concentration and synthesis temperature, Te2O3(SO4), TeO3 or TeO3·xH2O (x = 1.37–1.58) is obtained as the final product (alone or…
Abstract A versatile process employing anionic surfactants has been developed for the preparation of processible nanocomposite films with electrical conductivity and magnetic susceptibility. Maghemite ( γ Fe 2 O 3 ) nanoclusters (~10 nm in size) are coated with 4-dodecyl-benzenesulfonic acid, and polyaniline (PAn) cha…
The effects of differences in food matrices on the absorption of four flavour compounds (limonene, decanal, linalool and ethyl 2-methyl butyrate) into linear low-density polyethylene (LLDPE) were studied using a large volume injection GC ‘in vial’ extraction method. Food components investigated included β-lactoglobuli…
Zirconia samples have been prepared from xerogels and aerogels obtained using zirconium n-propoxide as precursor. Structure and texture have been investigated by X-ray diffraction, thermal analysis, transmission electron microscopy, nitrogen adsorption/desorption. Surface acidity and basicity have been assessed by ads…
A combined experimental and molecular simulation study of the oxidation of thioethers with hydrogen peroxide using Ti-containing zeolites as catalysts is described and discussed. Two aspects of reaction selectivity were explored. First, regioselectivity was studied for the oxidation of allyl methyl thioether with TS-1…
Abstract Cast film extrusions were carried out on polyethylene terephthalate (PET), on a laboratory line. The thermal and the geometrical behavior of the film, in the region from die to chill roll, was studied in different working conditions. The experimental evaluations were performed with an Infrared Thermography (I…
Deuterium induced isotopic shifts in the 13C NMR spectra of spiropyrans and equilibrium mixtures of their TTT and TTC merocyanine form isomers give insights into rovibrational and geometric changes that occur upon isotopic substitution which also result in changes in nuclear shielding. Isotopic shifts in the 13C NMR s…
An up-date is given on the use of ferroelectric (FE) thin films in memory devices, both as passive capacitors in dynamic random access memories (DRAMs) and as the memory itself in nonvolatile switching devices (both destructive-read-out NV-FRAMs and nondestructive-read-out ferroelectric-gated FETs – field effect trans…
Novel biodegradable polyphosphazenes containing glycine ethyl ester and benzyl ester of amino acethydroxamic acid as cosubstituents (PGBP) were synthesized by further modifying poly[bis(glycine ethyl ester)phosphazene] (PGP). The polymers were characterized by IR, 1H-NMR, DSC, and elemental analysis. Degradation exper…