Materials Literature
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Abstract The enzyme‐mediator‐conducting polymer model provides a convenient charge transporting immobilization matrix for redox enzymes in potential biosensor constructions. This study considers the charge transport mechanism in the benzoquinone (Q)‐polyaniline (Pani) system. An enhanced current can be obtained on Pan…
A high-pressure single crystal XRD study of KAlSi 3 O 8 with the tetragonal hollandite structure has been completed to 4.47 GPa. The a axis is approximately twice as compressible as c, so c/a increases with pressure. This anisotropy is similar to that of the structurally related mineral stishovite, though hollandite i…
A version of subtilisin BPN' lacking the high affinity calcium site (site A) has been produced through genetic engineering methods, and its crystal structure refined at 1.8 A resolution. This protein and the corresponding version containing the calcium A site are described and compared. The deletion of residues 75-83…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProbing miscibility and intermolecular interactions in solid polymer blends using the nuclear Overhauser effectJeffery L. White and Peter MirauCite this: Macromolecules 1993, 26, 12, 3049–3054Publication Date (Print):June 1, 1993Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticlePreparation and properties of new .pi.-conjugated poly(quinoxaline-5,8-diyl) and poly(2,3-diethylquinoxaline-5,8-diyl). Enhancement of electron-accepting properties of poly(arylenes) by introduction of imine nitrogenTakaki Kanbara and Takakazu YamamotoCite this: Macromolecules 1…
These papers discuss topics including: nonlinear optics in periodic diffractive structures; viscoelastic finite difference modelling; waveform inversion through MBTT reformulation; electromagnetic wave scattering; and elastodynamic inverse obstacle scattering.
We have investigated the excited-state absorption spectra of four ${\mathrm{Eu}}^{2+}$-doped materials: ${\mathrm{CaF}}_{2}$, ${\mathrm{SrF}}_{2}$, ${\mathrm{SrCl}}_{2}$, and ${\mathrm{LiCaAlF}}_{6}$. The excited-state absorption in the emission region of each material is similar in nature to that previously observed…
Semi-insulating polycrystalline silicon (SIPOS) are thin SiOx films (0≤x≤2), deposited by means of low pressure chemical vapor deposition on suitable substrates (silicon or sapphire). Although SIPOS has important applications in the semiconductor and solar cell technology, its physical properties which depend strongly…
In-situ x-ray flourescence detected surface EXAFS spectroscopy has been employed to elucidate the in-plane structure of copper underpotentially deposited on a clean and well ordered platinum (111) single crystal electrode. XANES and EXAFS analyses were made as function of applied potential (+0.2V, +0.1V, and 0.0V) cor…
Effects of fluid flow on the corrosion resistance of oil well materials in environments containing CO2 were studied using two experimental techniques. One method utilized weight loss measurements and a large flow loop that could attain a maximum liquid flow rate of 20 m/s. The other utilized electrochemical measuremen…
Structural properties of random propylene ethylene copolymers with low ethylene contents between 0 % and 11 mol % were investigated using mainly X-ray techniques. One of the essential issues of this paper is that a cocrystallization of the comonomer units does not take place. This is based on the following observation…
After a brief review of existing models of microsegregation in the dendritic arm spaces of binary alloys, a numerical microsegregation model based on conservative variables (to account for the solidification phase change) and a coordinate transformation (to account for coarsening) is outlined. In the context of this m…
This study characterizes the time course of change in single soleus muscle fiber size and function elicited by hindlimb unweighting (HU) and analyzes the extent to which varying durations of HU altered maximal velocity of shortening (Vo), myofibrillar adenosinetriphosphatase (ATPase), and relative content of slow and…
The thermodynamics of symmetric polymer blends is investigated using the polymer reference interaction site model integral equation theory with the new molecular closures presented in the previous paper. In contrast to the atomic mean spherical approximation reported earlier by Schweizer and Curro [J. Chem. Phys. 91,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways for photoinduced electron transfer within a mixed-metal bisporphyrinAnthony Harriman, Valerie Heitz, and Jean Pierre SauvageCite this: J. Phys. Chem. 1993, 97, 22, 5940–5946Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"Super" phanesRolf Gleiter and Detlef KratzCite this: Acc. Chem. Res. 1993, 26, 6, 311–318Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published inissue 1 June 1993https://pubs.acs.org/doi/10.1021/ar00030a003https://doi.org/10.1021/ar000…
Gadopentetate dimeglumine as an alternative contrast material for use in angiography.Y Kinno, K Odagiri, K Andoh, Y Itoh and K TaraoAudio Available | Share
OH…︁ON and H2CH…︁ON hydrogen bonds determine the arrangement of the stable radical 1 in the solid state. This leads to a system with intermolecular ferromagnetic interactions still rare in solids composed of exclusively organic compounds. The experimental findings are consistent with properties for solid 1 predict…
Abstract Pulsed laser photolysis (PLP) has been employed to determine propagation rate constants k p for styrene polymerization in benzene over a wider temperature range (20−80°C) than previously converd. It is proposed that a small chain length dependence of k p (overall) may, in part, be a consequence of a marked ch…
We have fabricated highly oriented, chemically prepared thin films of Pb(Zr 0.04 Tio. 0.60 )O 3 (PZT 40/60) on both insulating and conducting substrates. While (100) MgO single crystals were used as the insulating substrates, the conducting substrates. were fabricated by RF magnetron sputter deposition of 100‐nm‐thick…