Materials Literature
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Abstract Sorption of several organic and inorganic cations on illite (Clay Minerals Society Source Clay Imt-2) was determined experimentally and results compared to model calculations. The cations studied were crystal violet (CV + ), benzyltrimethylammonium (BTMA + ), benzyltriethylammonium (BTEA + ), Ca 2+ , Mg 2+ ,…
This paper describes a new micromachining technique for fabrication of semiconducting yttrium barium copper oxide (YBCO) microbolometers using magnesium oxide (MgO) as the sacrificial layer. This type of bolometer can be operated at room temperature, providing a low-cost alternative for more expensive cryogenically co…
A non-symmetric, three-component, charge-transfer molecule is introduced and experimental results on structure formation and optical storage are presented. The storage process takes place via the isomerization of the functional azo group in a transparent film. The Figure shows the molecule, consisting of a disc-like p…
The iron−copper dinuclear active site in heme-copper oxidases (e.g., cyctochrome c oxidase) has spurred the development of the inorganic chemistry of bridged heme-copper complexes, including species possessing (porphyrinate)Fe III −O(H)−Cu II −L moieties. We describe here the synthesis, by two routes, of [(F 8 TPP)Fe…
The mechanical properties of the Al 2 O 3 ‐NiAl system are investigated in the present study. Specimens containing 0 to 100 vol% NiAl in Al 2 O 3 were prepared by hot pressing. Both the strength and toughness of the Al 2 O 3 ‐NiAl composites are higher than the values predicted by the rule of mixtures. The grain growt…
The temperature induced goethite-hematite phase transformation that occurs at about 250 ℃ was studied using in situ synchrotron X-ray powder diffraction with a capillary Debye-Scherrer geometry and a translating image plate system (TIPS). To our knowledge, this is the first time the goethite- hematite transformation h…
The environment around Sr in silicate and aluminosilicate glass has been studied by neutron and anomalous x-ray diffraction and reverse Monte Carlo modeling. The first Sr-O distances are smaller in the silicate glass than in the aluminosilicate glass, which can be related to the different structural role of the elemen…
Novel polymer electrolytes have been prepared with hyperbranched polymers as the host and lithium trifluoromethanesulfonimide, LiN ( CF 3 SO 2 ) 2 , as the ion source. Analysis of the salt concentration dependence of the glass transition temperature indicates that intermolecular interactions occur in the polymer elect…
When an intercalated epithelial cell line was seeded at low density and allowed to reach confluence, it located the anion exchanger band 3 in the apical membrane and an H+-ATPase in the basolateral membrane. The same clonal cells seeded at high density targeted these proteins to the reverse location. Furthermore, high…
Recent studies of charge trapping and charge transport in spolymer films irradiated and charged with monoenergetic electrons of range smaller than the sample thickness and thereafter stored or annealed under various conditions are discussed. An analytical model used to describe the phenomena takes the following parame…
Poly( p -vinylphenol) (PVPh) and poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) formed interpolymer complexes in methanol, ethanol, or methyl ethyl ketone. However, only polymer blends were obtained from tetrahydrofuran or dimethylformamide. Each of the complexes and blends showed one composition-dependent glass…
Graft copolymerization of methyl methacrylate (MMA) onto chemically modified coir fiber was studied using a CuSO4–KIO4 combination as initiator in an aqueous medium in the temperature range of 50–70 °C. Concentrations or [IO4−] = 0.005 mol/l and [Cu2+] = 0.002 mol/l produce optimum grafting. The effects of time, tempe…
Topochemical assembly of a covalent material can be achieved with the complex LiBH4⋅TEA (TEA=triethanolamine; section of structure shown), a dihydrogen-bonded system which has very short H⋅⋅⋅H contacts and high solid-state reactivity due to acidity enhancement in the OH groups by Li+ ion complexation.
This text summarizes only what was new in an invited review, the overal nature of which was to cover device models for ferroelectric thin film memories, including strontium bismuth tantalate (SBT), barium strontium titanate (BST), and lead zirconate titanate (PZT), generally on platinum electrodes. In the written vers…
Interleukin (IL)-5 is a chemotactic factor of eosinophils, and promotes the growth and survival of eosinophils, which plays an important role in the eosinophilia-associated allergic inflammation. In this study, luteolin 4'-O-glucopyranoside was identified as the IL-5 inhibitor from Kummerowia striata Thunb. (Leguminos…
Kontinuierlich kann die Codimerisierung von Styrol und Ethen mit dendritischen Pd-Komplexen wie 1 in einem Nanofiltrations-Membranreaktor durchgeführt werden. Die Selektivität der Reaktion wird unter kontinuierlichen Bedingungen deutlich erhöht. Monomere Modellkomplexe und dendritische Katalysatoren werden im Satzbetr…
A precursor for Y 3 Al 5 O 12 was synthesized as a YAG sol by simply dissolving Y 2 O 3 powder in an alumina sol. Phase‐pure Y 3 Al 5 O 12 powder was obtained by precipitating the YAG sol with an aqueous dilute ammonia solution followed by calcination at 1100°C. TG/DTA analysis showed an exotherm at 938°C attributed t…
The axial catalyst distribution in a monolithic converter that minimises cold-start pollutant emissions is investigated numerically, under the constraint of fixed total catalyst surface area. Various warm-up mechanisms can be present during the transient period. The catalyst distribution affects greatly which mechanis…
Mechanical properties of composites are a direct function of the interface bonding between strengthening fiber and the matrix. This study investigates the influence of surface modification of wood chips and presence of different interface coupling agents on the interface bonding of wood-polyethylene composites. Single…
Abstract Otavite-calcite solid solutions have been synthesized to investigate the factors which control the patterns of compositional zoning. The equilibrium partitioning of otavite between the aqueous and the solid phase can be described by means of a function X CdCO 3 ( X Cd,aq ) eq , which relates the solid mole fr…