Materials Literature
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Abstract Polyurethanes are one kind of relic protection materials commonly used. During artificial photo‐ageing, three polyurethanes, HDI‐based polyurethane, MDI‐based polyurethane and TDI‐based polyurethane, have been considered to undergo UV radiation. Photochemical degradation of the polyurethanes has been monitore…
No studies have been conducted to evaluate the potassium (K) quantity‐intensity (Q/I) relationships that exist in eastern South Dakota soils and how that may affect K fertility interpretations. The objectives of this study were to i) evaluate the K status of smectite‐dominant soils through quantity‐intensity relations…
The transition frequencies of multibubble systems in a sound field are reexamined to confirm their existence and further clarify their physical properties. We have recently suggested that a gas bubble interacting with a neighboring bubble in a sound field has up to three transition frequencies which invert the pulsati…
The structural and dielectric properties of Bi 2 Ti 2 O 7 –Zn 2 Nb 2 O 7 solid-solution thin films were investigated using (Bi 2- x Zn x )(Nb x Ti 2- x )O 7 (BZNT, 0.05≤ x ≤1.0) pyrochlore thin films prepared on platinized Si substrates by metalorganic decomposition (MOD) process. Thermal analysis and X-ray diffractio…
The synthesis and physical properties of bent‐shaped molecules with ester linkages and methoxy substitution on a non‐central ring are presented. Terminal chains of most mesogens contain a group with double bond, which promotes polymerization. In all the compounds studied a B2 phase just below the isotropic phase has b…
Boronic-acid-based dyes have been widely studied in the past decade as potential sensors for sugars and carbohydrates, owing to the strong interaction of boronic acid and diols. In this work, two boronic-acid-appended metalloporphyrins were synthesized by new routes and tested as potential sugar and carbohydrate senso…
Abstract Three extant species of the genus Paralia (Bacillariophyceae) occur along the coast of Japan, two of them are new species. Observations of living populations suggested that significant characters for separating Paralia species are (1) structure of the mantle of the separation valve; (2) shape of the linking s…
Polycrystalline and mosaic bicrystalline titanium films were subjected to steep heating/cooling rate of 1011∕108Ks−1 by laser pulsing. The induced phase transformations were followed by imaging and diffraction with a dynamic transmission electron microscope on the time scale of nanoseconds. On heating the film up to n…
Abstract Both in situ microscopy experiments at embedded inlaid copper interconnect structures and numerical simulations based on a physical model provide information about electromigration-induced degradation mechanisms in on-chip interconnects. It is shown that the modification of the bonding strength of the weakest…
A mechanism for γ-ray-induced changes in the optical properties of ternary Ge–As sulphide glasses is analysed at the microstructural level. It is shown, using IR FFT spectroscopy, that these changes are associated with chemical bond switching accompanied by coordination topological defect formation.
We have succeeded in fabricating (001)-oriented diamond p – n junctions with good diode characteristics and realized UV light emission by current-injection at room temperature. As p – n junctions, a phosphorus-doped n -type layer was formed on (001)-oriented boron-doped p -type one by applying an optimized homoepitaxi…
The calculations of the high spin (HS) and low spin (LS) states of the [Fe(II)(DPPA)(NCS)(2)] complex have been performed at three experimentally observed geometries corresponding to three synthesized polymorphs with different spin-transition behavior. The structure optimization leads to a single molecular structure,…
Doping Cu with some elements has been proved to be a promising method to improve the reliability of Cu interconnects. In this paper, Ag was chosen as the alloying element because of its low bulk resistivity and low solubility in Cu. Cu–Ag alloy film was prepared by layered evaporation and postdeposition annealing in v…
No presente trabalho foram desenvolvidos comprimidos de captopril revestidos com hidroxipropilmetilcelulose (HPMC), Opadry®, polivinilpirrolidona (PVP), Eudragit® E e goma laca. Foi realizado estudo termoanalítico do fármaco e das formulações através de termogravimetria (TG) e calorimetria exploratória diferencial (DS…
[reaction: see text] Directional intramolecular interactions play a critical role in the self-assembly of donor-sigma-acceptor molecules in solution. Amide functions on the periphery of the tricyclic core stabilize a C3-symmetric monomer conformation by intramolecular hydrogen bonding and dipole-dipole interactions. T…
Combinatorial ion implantation techniques with mask and digital scanning systems were applied to optimize conditions of the optimal Eu dose for the orange luminescence originating from Eu phosphor in ZnO thin films. Eu ions accelerated to 150 keV were implanted continuously in the range of 1×10 16 to 2×10 17 ions/cm 2…
Abstract Thin layers of tungsten trioxide have been prepared from an aqueous solution of peroxotungstic acid (PTA) using the sol-gel method. Compositional, structural and optical characteristics of WO3 coated on indium tin oxide (ITO) conductive glass substrates were studied using X-ray diffractometery (XRD), cyclic v…
Abstract In this paper, the degree of breakage of glass filament yarns during the weft knitting process is studied. A quantitative method used for assessing the degree of glass filament breakage is proposed, and the effects of different factors such as cam setting, knitted structures and yarn parameters are analysed.…
Abstract— The modification of the properties of existing LCs by doping them with ferroelectric micro‐ and nano‐particles will be reported. This approach, in contrast to the conventional time‐consuming and expensive chemical synthetic methods, enriches and enhances the electro‐optical performance of many liquid‐crystal…
A novel redox system, potassium ditelluratocuprate(III) (DTC)–chitosan, was employed to initiate the graft copolymerization of methyl methacrylate (MMA) onto chitosan in alkali medium. The effects of reaction variables, such as the initiator concentration, ratio of monomer to chitosan, the pH value, as well as reactio…