Materials Literature
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Abstract An optimized set of thermodynamic functions to describe the Al – V system has been obtained by a computer-operated least squares method applied to the experimental phase diagram and thermodynamic data available from the literature. Special attention is paid to the modeling of the intermediate phase Al8V5. Bas…
We have performed a first characterization of the diffraction efficiency of gratings written in liquid-crystalline composite materials by the interference pattern of two curing beams. The grating fringes consist of polymer slices separated by films of continuous nematic phase. The dependence of the diffraction efficie…
Regulations regarding automotive diesel engine emissions become more severe every year, and it is difficult to meet the requirements with only combustion improvement techniques. More effective post-processing technology is desired especially for particulate matter (PM), such as carbon soots. Although the use of a cera…
The authors present a novel route for the preparation of monolithic carbons with a meso/macroporous structure by templating mesostructured silica monoliths prepared by using macroporous polystyrene foams as structure scaffolds. The carbon skeletal of these materials shows a well‐developed and well‐structured porosity…
In this study, the effect of polymer materials with different polarity, namely low density polyethylene (LDPE) and ethylene vinyl acetate (EVA), on the migration behaviour of alpha-tocopherol from active packaging was investigated. The antioxidant was also adsorbed onto silica materials, namely SBA-15 (Santa Barbara-1…
Cr concentrations of ∼2at.% were incorporated into AlN during growth by molecular beam epitaxy. Under optimized conditions, single-phase, insulating AlCrN is produced whose band gap shows a small (0.1–0.2eV) decrease from the value for undoped AlN (6.2eV), a decrease in a-plane lattice constant and the introduction of…
The ultraviolet (UV) stabilities of liquid crystal compounds containing cyano (CN) and isothiocyanato (NCS) terminal groups are compared. UV exposure is found to degrade the clearing temperature, birefringence, dielectric constants and visco-elastic coefficient of the liquid crystal compounds. The measured data show t…
Cross-linking reagents based on an azobenzene core can be used to reversibly photoregulate secondary structure when introduced as intramolecular bridges in peptides and proteins. Photoisomerization of the azobenzene core in the trans to cis direction is triggered by photon absorption but isomerization from cis to tran…
Catalysts containing 2-10 wt% MnO 2 supported on TiO 2 were examined for H 2 O 2 decomposition. Catalysts were prepared by impregnation of a high TiO 2 surface area. X-ray defraction patterns, scanning electron micrographs, and surface area measurements gave evidence of a uniform distribution of the active phase on th…
Three decades since the introduction of cisplatin into clinical cancer treatment, this drug and its second generation analogues, carboplatin and oxaliplatin, form an integral part of recent evolving achievements in the treatment of solid tumors. For example, landmark studies have established a role for cisplatin after…
Abstract The miscibility of chitosan and poly(vinyl pyrrolidone) −PVP‐ has been studied by viscosity measurements, differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). For chitosan/PVP blends in solid state (thin films) interaction were found by FTIR and DSC methods. After blendi…
With surface-relief structures, optical functions that are required for radiation power management such as antireflection, light trapping, or light distribution and redirection can be obtained for new applications in solar energy systems and in displays. There, structures with submicrometer features must be distribute…
This study examines the liquid moisture transfer properties of a selected group of heat-resistant workwear fabrics using a demand wettability test. The Gravimetric Absorbent Testing System procedure is modified and developed to assess the effects of wicking finish treatment and hygroscopic fibers on workwear fabrics.…
Of the laboratory devices available for examining the effects of single-phase fluid flow on corrosion, the rotating cylinder electrode is probably one of the simplest devices to construct and operate under defined hydrodynamics in the turbulent flow regime. This review examines several areas important to the use of th…
A synthesized hyperbranched polymer, which is chemically analogous to PAMAM dendrimers, was used to prepare water “soluble” gold nanoparticles. The open structure of the hyperbranched polymer compared to the dendrimer architecture facilitates the interactions of metal ions (e.g., AuCl4-) with the internal chemical fun…
Abstract The anisotropy in the optical absorption and photoconductivity of thin layers of mesomorphic derivatives of hexa‐ peri ‐hexabenzocoronene (HBC) have been investigated for aligned films prepared via three different methods: deposition on friction‐deposited polytetrafluoroethylene (PTFE), zone‐casting (ZC), and…
Transmission and reflection measurements on polyamide nanocomposite films were performed in the THz frequency region, and the dielectric function was calculated using the Debye model to interpret the data. The relaxation time from the signal of orientation polarization due to the permanent dipole moments exhibits inte…
Feldspar nucleation rate data obtained by laboratory decompression of hydrous silicate melt are interpreted in view of the classical theory of nucleation (CNT) and a non-classical variation, the diffuse- interface theory (DIT). The nucleation rate data can be modeled by the CNT formalism only if the interfacial free e…
This paper gives a finite element model to simulate the entire process of multilayered fabric target perforated by conically cylindrical steel projectile on the basis of the description of the actual structure of fabric considering crimps of warp and weft yarns. Commercially available finite element code Ls-Dyna is in…
The electronic properties of ${\mathrm{FeCl}}_{3}$ intercalated single-wall carbon nanotubes were investigated using high-resolution electron energy-loss spectroscopy in transmission and optical spectroscopy. The lowering of the nanotube Fermi level is directly measured via electronic excitations from C $1s$ to empty…