Materials Literature
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Fibroin, the core of the silk filament protein, has been proposed as a biomaterial for different biomedical applications since it can be engineered as a thread, fabric or film. Infrared spectroscopy suggests that the dissolution of the fibroin filaments and subsequent casting of the fibroin solution into films followe…
Anodic formation of oxide films on titanium surfaces, in various concentrations of aqueous KOH solutions, have been studied using ellipsometry and micro-Raman spectroscopy. By in situ ellipsometric measurements the coefficient of film thickness growth and indexes of refraction of anodic oxide films have been determine…
Arylnitroso dienophiles exist in equilibrium with their dimeric counterparts, which in turn form stable bidentate complexes with scandium(III) triflate and react with cyclohexadiene to give the corresponding Diels-Alder adduct at the same rate as the normal thermal process.
Analytical models of the penetration process focus on estimating depth of penetration based on target density, target strength (sometimes associated with the unconfined compressive strength of the target for geological targets), the areal density of the penetrator (W/A), and the impact velocity. In this paper, an expr…
This study investigates the internal fibrillation of chemical pulps, with a focus on how the pores in once dried chemical pulps are reopened in beating. A novel thermoporosimetry technique was used to measure the change in pore size distribution (PSD) and pore volume during drying and beating. This technique is based…
Nanocomposite Al-based alloys can be obtained with a combination of amorphous, crystalline and quasicrystalline phases. In order to understand the correlation between the nanostructure and the mechanical behaviour, four nanocomposite alloys with different characteristics were studied: two alloys from the Al–Fe–Cr–Ti s…
Conducting polymer bilayer films containing polypyrrole/dexamethasone sodium phosphate as an inner film and poly(N-methylpyrrole)/polystyrenesulfonate or self-doped polyanilinesulfonate as an outer film were prepared by electrochemical and chemical methods. The controlled release of dexamethasone sodium phosphate (DMP…
The mechanism and energetics for the formaldehyde to formic acid and the formic acid to carbon dioxide conversions are investigated using the FeO + complex as an oxidant from theoretical calculations at the B3LYP DFT level. In the oxidation processes, there are a lot of reaction branches which are comparable in energy…
The antisolvent crystallization of sodium chloride was carried out in batches to observe crystallization phenomena using ethanol as an antisolvent. To decrease high local supersaturation generated by the addition of antisolvent, the authors have proposed a new idea by choosing high ethanol concentration operational co…
A theoretical model is presented for of magnetoelectric effect in bilayer and multilayer composites. A novel approach to take into account the actual boundary conditions in multilayer composites is proposed. An averaging method is used for deriving effective material parameters in composites. The effect of dielectric…
The resonance stabilized dithiazolo-dithiazolyl radical 1b adopts a slipped π-stack structure exhibiting weak 1-D ferromagnetic coupling; variable temperature conductivity measurements indicate σRT = 2 × 10−6 S cm−1.
MCM-41 was found to be an active heterogeneous catalyst for the synthesis of nopol by the Prins condensation of beta-pinene and paraformaldehyde, but Sn-MCM-41 in which Sn has been grafted on MCM-41 by chemical vapor deposition is far more active and combines high efficiency and recyclability.
The metal-insulator (M-I) transition in conducting polymers is particularly interesting; critical behavior has been observed over a relatively wide temperature range in a number of systems, including polyacetylene, polypyrrole, poly (phenylene vinylene) and polyaniline. In each case, metallic, critical and insulating…
The degradation of novel biodegradable segmented polyurethanes was investigated with a view to determining the cleavage points within the polymer backbones targeted by the enzyme chymotrypsin. While the materials were developed with specific enzyme cleavage sites designed into the polymer chains, the nature of their d…
The interaction between low dielectric constant (low- k ) hybrid organic siloxane polymer (HOSP) and O 2 plasma ashing has been investigated. O 2 plasma ashing is commonly performed to remove the photoresist (PR) during integrated circuit fabrication. However, dielectric loss usually occurs in the HOSP films during th…
Passivation on polycrystalline Zr (hcp) and Ta (bcc) depends on the crystallographic orientation of the individual grains, determined by electron back scattering diffraction (EBSD). Microelectrochemical experiments yield characteristic data, such as oxide formation potentials, formation factors, capacities, and thickn…
The purpose of this research was to evaluate the performance of a modified rolled homogeneous armor (MRHA) steel during ballistic impact tests. AerMet 100, AISI 1045 and 4130 steels were also tested for comparison with the MRHA results. The “white"‐etched portion of adiabatic shear bands was found on the front surface…
Tryptophan 128 of hydroxynitrile lyase of Manihot esculenta (MeHNL) covers a significant part of a hydrophobic channel that gives access to the active site of the enzyme. This residue was therefore substituted in the mutant MeHNL-W128A by alanine to study its importance for the substrate specificity of the enzyme. Wil…
Si 3 N 4 materials with distinct microstructures were prepared by hot‐pressing, varying the holding time at the maximum temperature, and using different types and amounts of sintering additives. Materials with thermal conductivities of 15–82 W·(m·K) −1 were obtained by changing the processing variables. The highest co…
The extensive information available in the literature for liquid film thickness measurement in multiphase systems has been critically reviewed. The review is structured by classification of the identified measurement techniques into groups of comparable measurement resolution. Each technique is reviewed in terms of de…