Materials Literature
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The non-enzymatic deamidation at residues Asn-12 and Asn-38 of Escherichia coli phosphocarrier protein, HPr, and the repair of the resulting L-isoaspartyl (or beta-aspartyl) derivatives, HPr-1 and HPr-2, by recombinant human S-adenosylmethionine-dependent L-isoaspartate-(D-aspartate) O-methyltransferase (EC 2.1.1.77)…
Recently, the transition to ferromagnetic order has been found in crystals of organic compounds not containing metallic elements. The progress of the research is reviewed starting from the initial stage of study to obtain the design strategies to induce ferromagnetic interaction in organic crystals to the discovery of…
Several cyanovinyl aromatics and related compounds were newly designed and synthesized for the enhancement of second-order nonlinear optical susceptibility (β) without narrowing the optical transparency. The values of net dipole moment and second-order nonlinear optical susceptibility were tuned by control of vector d…
Iodine separation technology using an inorganic adsorption material has been investigated in order to apply the technology to the off-gas treatment systems of nuclear facilities. Iodine removal efficiencies were checked by laboratory experiments using simulated off-gas streams of various conditions and the developed a…
Abstract The effect of cross‐link density on the morphology and properties of two flexible molded foam samples was studied. Film samples based on the same foam formulations were also fabricated to study the feasibility of using them for the characterization of complex foam products. Fourier transform infrared spectros…
Aging can modify polymer structure at the molecular, macromolecular, and/or the morphological level and thus induce changes in the mechanical properties. Stiffness is generally not modified for nonrubbery materials, except for mass transfer (solvent plasticization or plasticizer loss) in amorphous polymers or phase tr…
Variation of component ratios in a class of ternary microemulsions is shown to give model media of prescribed microstructure. Observed structural changes are analyzed in the context of a percolative phenomenon. The effective medium approximation predicts measured transport properties. Near percolation, transport prope…
Edible films of methyl cellulose, stearic acid and polyethylene glycol, made by the emulsion method, were constructed with varying volume fractions of stearic acid. These films were evaluated for water vapor permeability. There was a significant decrease in the water vapor permeability through these films with increas…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal Structure and Sodium Environments in Sodium Tetratellurite, Na2Te4O9, and Sodium Tellurite, Na2TeO3, by X-ray Crystallography and Sodium-23 NMRS. L. Tagg, J. C. Huffman, and J. W. ZwanzigerCite this: Chem. Mater. 1994, 6, 10, 1884–1889Publication Date (Print):October…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray Photoelectron Spectroscopy Study of Argon Plasma-Treated FluoropolymersMorton A. Golub, Eugene S. Lopata, and Lorie S. FinneyCite this: Langmuir 1994, 10, 10, 3629–3634Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published iniss…
Magnetization as a function of temperature has been measured for amorphous (a-) (${\mathrm{Fe}}_{\mathit{p}}$${\mathrm{Ni}}_{1\mathrm{\ensuremath{-}}\mathit{p}}$${)}_{80}$${\mathrm{B}}_{19}$${\mathrm{Si}}_{1}$ (0.0625\ensuremath{\le}p\ensuremath{\le}0.2), (${\mathrm{Fe}}_{\mathit{p}}$${\mathrm{Ni}}_{1\mathrm{\ensurema…
A process is introduced for producing continuously graded materials by slip casting with a continuous flow of slip of changing composition. The approach has been tested using alumina and zirconia slips to produce alumina/zirconia composites with a graded composition. Observation of the microstructure has shown that th…
Abstract The inhibition of steel corrosion in 0.5 M sulfuric acid by adenine at different temperatures was shown to follow the Langmuir adsorption isotherm over a wide concentration range (10−5 to 10−3 M). The corrosion potential, corrosion current, corrosion rate, polarization resistance, as well as activation energy…
Abstract X‐ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) were used to study the influence of fluorine contamination on aluminium microchip bond pads. Sputter depth profiles indicated that the oxide layer thickness on those band pads, which showed poor gold wire adhesion, was higher than th…
X-ray photoelectron spectroscopy (XPS) spectra of palladium chloride (PdCl2) are presented. Ground PdCl2 powder was pressed into Al foil and analyzed with a Surface Science Instruments SSX-101 M-Probe ESCA instrument using monochromatized Al Kα x rays. Spectra include a survey scan, the Pd 3d, 3p, 3s, 4s, 4p regions,…
Poly(ethylene terephthalate) is used in numerous industrial applications. Successful medical applications are in the area of cardiovascular surgery. Its chemical functionality makes it propitious to grafting biochemical compounds; surface modification by plasma treatment may also be used to improve biocompatibility an…
Control of nucleation may be needed to obtain a reliable supply of large protein crystals, when standard techniques give many small or twinned crystals. Heterogeneous nucleation may be controlled by the use of fine filters, with the elimination of airborne contaminants by working under paraffin oil. The area of contac…
Abstract A review containing 83 references on the chemistry aspects (mechanism and structure–property relationships) for IPN synthesis is presented.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPossible Hard Materials Based on Interpenetrating Diamond-like NetworksDavide M. Proserpio, Roald Hoffmann, and Paul PreussCite this: J. Am. Chem. Soc. 1994, 116, 21, 9634–9637Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published ini…
The effective transverse thermal conductivity of Si3N4 thin films is determined as a function of film thickness. Results indicate that the effective thermal conductivity behavior of Si3N4 thin films is similar to that exhibited by amorphous SiO2 films; that is, there is no significant difference between the thermal co…