Materials Literature
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An apparatus for deep-ultraviolet interferometric lithography is described, in which the interfering beams illuminate the substrate through a fused silica prism and a layer of index-matching liquid. The liquid-immersion technique was found to be compatible with a commercially available, chemically amplified photoresis…
Soil properties in central and northeastern British Columbia are strongly influenced by parent materials because of geologically young till, glaciolacustrine, and glaciofluvial deposits. We examined pedogenesis on various parent materials to support studies of long-term forest productivity. We sampled nine pedons deve…
OBJECTIVE: To characterize the proton-magnetic relaxation properties and complexation equilibria of gadobenate dimeglumine and to develop a pharmaceutical formulation for injection. METHODS: Proton-magnetic relaxivities were determined at 20 MHz and 39 degrees C. Metal complexation was studied potentiometrically. Degr…
Thin films of (001)-oriented Sr2FeMoO6 have been epitaxially deposited on LaAlO3 and SrTiO3 (001) substrates. Comparison of their transport and magnetic properties with those of polycrystalline ceramic samples shows a metallic versus semiconductor temperature dependence and a saturation magnetization Ms at 10 K of 3.2…
Dense Si/SiC composites were fabricated via a conventional reaction‐bonding process, using oak charcoal that exhibited a honeycomb structure. The silicon melt was infiltrated into the porous oak charcoal (density of ~0.6 g/cm 3 ) while the sample was heated to 1700°C under vacuum (10 ‐3 torr (~0.133 Pa)), which result…
The high-luminance blue emitting electroluminescent (EL) devices which have been satisfied with the requirement for full color displays were obtained. BaAl 2 S 4 :Eu thin-film EL devices as the new blue emitting EL phosphor was prepared by the two targets pulse-electron-beam evaporation. The maximum luminance level wa…
The alpha-helical coiled coil motif is among the first characterized and widely found architecture of protein structures. We report here a fast and reliable approach of simulated annealing molecular dynamics (SA/MD) for predicting the three-dimensional structures of various alpha-helical coiled coils of heptad repeat.…
When a new textbook on transmission electron microscopy is published and all of one's colleagues, established research scientists and graduate students alike, immediately go out and buy a copy–some even using their own money–then that is probably the best recommendation a book can ever get!
The metal atom disorder in the crystalline clusters Fe 2 Ru(CO) 12 ( 1 ) and FeRu 2 (CO) 12 ( 2 ) has been shown to be dynamic in origin. At and below 313 K, 1 crystallizes in the noncentrosymmetric space group Pn with two independent molecules in the asymmetric unit, both molecules having approximate C 2 v symmetry w…
Pulsed laser deposition is a well established deposition technique for oxide thin films and heterostructures. The knowledge and control of the growth processes of oxide materials are important for the fabrication of high-quality epitaxial and heteroepitaxial thin-film structures. Because of the high oxygen pressure du…
The experimental techniques and theoretical background as well as some examples of material strength measurements at submicrosecond load durations are discussed. The presented experimental data for engineering metals and alloys and for metal single crystals demonstrate the effects of material grain structure and tempe…
The reduction behavior of sputtered thin Cu 2 O films with hydrogen plasma generated by a dielectric-barrier glow discharge was investigated by means of surface characterization and hydrogen plasma diagnosis using the vacuum ultraviolet (VUV) line absorption technique. The reduction model was derived by assuming that…
The correlation between electron field-emission properties of diamond films prepared by the chemical vapor deposition (CVD) process and the defect structure induced by boron doping was examined. Secondary ion mass spectroscopic analysis indicates that the solubility limit of boron in diamond is (B3+)2=5×1021 cm−3, whe…
Hemicelluloses, extracted from the delignified poplar chips with 8.0% NaOH-1.0% Na2B4O7-10H2O, were esterified with various acyl chlorides in the homogeneous N,N-dimethylformamide/lithium chloride system. Comparative reactions were performed with different molar ratios of acyl chloride/anhydroxylose, different concent…
For a series of side-chain liquid crystalline (LC) diblock copolymers we have investigated the overlap of liquid crystalline and morphological phase behaviors. LC thermal transitions were identified using polarized optical microscopy combined with calorimetry. Order−disorder and order−order transitions (ODT's and OOT'…
OBJECTIVE: Evaluation of the pharmacokinetic behavior of gadobenate dimeglumine, a new multipurpose parenteral contrast agent for magnetic resonance imaging. METHODS: The pharmacokinetics were evaluated in rats, rabbits, dogs and monkeys after intravenous injections of non-labelled gadobenate dimeglumine and, for biod…
Moving light-emitting diodes are envisioned as a possible application of the work presented here. Microfabricated bilayer hinges of polypyrrole (PPy) and gold are used to rotate and position silicon plates. This is achieved by electrochemically altering the oxidation state of PPy, thus causing a significant volume cha…
In this report, a comparative study of physical properties of the multilayered ZnO:Al films prepared by a combination of RF and DC magnetron sputtering is presented. It has been found that a RF/DC/DC trilayered system consisting of a thin RF-sputtered ZnO:Al bottom layer with two identical DC-sputtered ZnO:Al layers d…
Abstract Gum and black-filled vulcanizates of styrene-butadiene rubber (SBR) and natural rubber (NR) were prepared. Strengths in uniaxial tension were determined for specimens with and without edge-cuts. Normal tensile strengths (no cut) of the gum NR, filled NR and filled SBR were similar; whereas, with pre-cuts, eve…
Molecular dynamics simulations for a thin film of water confined to a slit nanopore are performed in order to investigate the dynamic process of crystallization of the system. The system upon freezing creates a bilayer ice crystal composed of two layers of hexagonal rings. We perform one simulation at T=257 K during w…