Materials Literature
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Crystallographic models are built by interpretation of an experimental image, the electron density map. This map is generally calculated from amplitudes measured experimentally and phases obtained with the multiple isomorphous replacement method. This method has poor precision, generating errors in the phases and ther…
In the past, the principal techniques of choice for analyzing tissue for various inorganic atomic species have been colometric and via atomic absorption spectrophotometry ( 1 ). Although both methods can be accurate and precise when performed in the same laboratory, there are disadvantages, which include interlaborato…
In an attempt to improve the field emission (FE) characteristics of carbon nanotubes (CNTs), we have performed a first-principles study on MgO-coated CNTs. A MgO slab covering a CNT tip under a strong electric field shows dielectric screening behaviours with applied electric fields up to 0.3 V Å −1 and the effective d…
LaInO(3), a promising ion conductor for a holistic solid oxide fuel cell, was synthesized by a solid-state reaction method. The structure was refined by the Rietveld method using X-ray powder diffraction data. The structure of LaInO(3) is distorted by the in-phase and antiphase tilting of oxygen octahedra in the a(+)b…
Epitaxial Prussian blue (PB) films are deposited electrochemically onto a Au(110) substrate. High-resolution X-ray diffraction shows that the PB films have a [111] out-of-plane orientation. The very large lattice mismatch of 148% is reduced to about 1% by the formation of (1 x 2)PB(111)[onemacr;10]//(6 x 5)Au(110)[one…
${\mathrm{E}\mathrm{r}}_{5}{\mathrm{S}\mathrm{i}}_{4}$ is a member of the ${R}_{5}({\mathrm{S}\mathrm{i}}_{4\ensuremath{-}x}{\mathrm{G}\mathrm{e}}_{x})$ family of alloys, where $R=\mathrm{r}\mathrm{a}\mathrm{r}\mathrm{e}$ earth metal. Many of these compounds display a strong coupling between the magnetic and crystal l…
We have used a kinetic model to investigate the influence of changing the pressure (0.1–0.8 Torr) and power (100–300 W) on the non-equilibrium plasma chemistry of RF (13.56 MHz) produced C 2 H 2 (1%)/H 2 /Ar plasmas of interest for the synthesis of nanodiamond thin films. We found that the concentrations of the specie…
Using ab initio calculations, we have studied the influence of optical activation on functionalization reactions of silicon quantum dots with unsaturated hydrocarbons. We find that the energy barrier for the replacement of silicon-hydrogen with silicon-carbon bonds is dramatically reduced if the silicon dot is optical…
Heteronuclear NMR relaxation measurements and hydrogen exchange data have been used to characterize protein dynamics in the presence or absence of stabilizing solutes from hyperthermophiles. Rubredoxin from Desulfovibrio gigas was selected as a model protein and the effect of diglycerol phosphate on its dynamic behavi…
Corn gluten meal (CGM)/wood fiber composites, plasticized by glycerol, water and ethanol, were extruded into pellets, and then the pellets were compression-molded into sheets for evaluation of water resistance, thermal stability and morphology. Pellets were also injection-molded to prepare plant pots for developing lo…
Several experiments were performed to compare the in vitro adhesion of human macrophage and granulocyte inflammatory cells to polyethylene terephthalate substrate and the same coated with a phosphorylcholine (PC)-based polymer. The inclusion of various types of serum at different stages in the assay indicated that pro…
The stability of the native structure of globular proteins is known to be affected strongly by a variety of substances that act at high concentration (usually ≥1 M ). We will refer to these as co-solvents, whether they are liquids or solids. Some of these substances are known to stabilize protein structure, others to…
High- T g yet mechanically robust polymers are desirable but difficult to realize. To explore whether the insertion of a motionally active molecular entity in the backbone could produce polymers with both high T g and yet are not brittle, three series of high- T g glassy polycarbonates/polyesters/poly(ester carbonate)…
The transformation of the micro-domain structure of polyimide films during thermally induced chemical conversion from the polyamic acid prepared from 3,3‘,4,4‘-diphenyl tetracarboxylic dianhydride and p -phenylene diamine, also in the presence of triphenyl phosphate, is studied with a transmission electron microscope.…
The dilation of polycarbonate (PC), poly(vinyl acetate) (PVAc), and poly(ether urethane) (PEUT), induced by acetonitrile sorption at 40 °C, was studied using FTIR-ATR spectroscopy. Results compared well to those obtained through direct observation of volumetric changes using a CCD camera. Polymer dilation and penetran…
Exfoliated graphite (EG) is prepared by the thermal exfoliation of graphite intercalation compounds at different temperatures. Surface and bulk physicochemical properties of EG are followed by spectroscopic and analytical methods and are observed to be a function of exfoliation temperature. EG particles can be recompr…
A graphene sheet is well known to be highly stable against chemisorption of a single hydrogen atom, since a puckered ${\mathrm{sp}}^{3}$ hybridized site heavily distorts the surrounding ${\mathrm{sp}}^{2}$ framework. However, successive adjacent chemisorbed hydrogen atoms can engage in a collective stabilization media…
We report on the adsorption from solution of a family of triblock copolymers, copoly(ethylene oxide−propylene oxide−ethylene oxide) (PEO−PPO−PEO), on a gold surface modified by a methyl-terminated, self-assembled monolayer (SAM) of a long-chain alkanethiol (CH 3 (CH 2 ) 10 SH). We employed a surface plasmon resonance…
Organ transplantation has been successful since the early 1960s as a result of the success in immunologic suppression in the clinical setting ( 1 ), and has saved, and is continuing to save, countless lives, but is far from a perfect solution to tissue losses or organ failures. By far the most serious problem facing t…
Gas-solid heterogeneous photocatalytic oxidation of aromatic compounds in air was carried out at room temperature with a fixed bed flow reactor. The deposition of Rh on TiO2 catalyst improved the catalyst durability in benzene photooxidation. The Rh deposition reduced the amounts of carbonaceous materials on the catal…