Materials Literature
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In order to assess the functional properties of the extreme amino-terminal peptide of rat testis fructose-6-phosphate,2-kinase: fructose-2,6-bisphosphatase, 24 and 30 amino acids from the NH2 terminus were deleted using oligonucleotide-directed mutagenesis. The expressed wild-type (WT) and the mutant (Del 24 and Del 3…
Bioresorbable vascular grafts constructed for polyglactin 910 (PG910) and polydioxanone (PDS) and nonresorbable Dacron were interposed into the infrarenal abdominal aortas of New Zealand White rabbits. The prosthesis/tissue complexes were harvested after 2, 3, 4, 12, and 52 weeks. Seventeen, 9, and 1 h prior to sacrif…
In this paper, we describe a new, entirely computer-controlled apparatus designed for degradation studies of photochromic compounds. Photodegradation can be performed in three different ways using, in addition to the usual flash mode, the cyclic and continuous modes which more closely simulate daylight exposure condit…
The effect of SiO 2 on the thermal conductivity of aluminum nitride pressureless sintered with 3 wt% Y 2 O 3 as a sintering aid was investigated. SiO 2 additions greatly decreased the thermal conductivity of the sintered parts from values of around 160 W/m·K on undoped samples to about 25 W/m·K with 5 wt% SiO 2 added…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT.pi.-Conjugated soluble poly(6-hexylpyridine-2,5-diyl) and poly(6,6'-dihexyl-2,2'-bipyridine-5,5'-diyl) with high molecular weights and n-type conducting properties. Synthesis, electrical and optical properties, and chemical reactivities of the polymersTsukasa Maruyama, Kenj…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZirconium-assisted homologation of pyrrole to pyridine in the conversion of meso-octaethylporphyrinogen into a meso-octaethyltrispyrrolemonopyridine macrocycle with carbon monoxide and the structure of the first zirconyl complexDenis Jacoby, Carlo Floriani, Angiola Chiesi-Vi…
The effect of CaO on the thermal conductivity of aluminum nitride pressureless sintered with 3 wt% Y 2 O 3 as a sintering aid was investigated. Over the composition range of 0 to 2.0 wt% additions, CaO decreased the thermal conductivity of the sintered parts by 10%. CaO doping rendered the secondary oxide phases more…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLead(II)/platinum(II) complexes with and without Pb-Pt interactionsAlan L. Balch, Ella Y. Fung, Jeffrey K. Nagle, Marilyn M. Olmstead, and Stephen P. RowleyCite this: Inorg. Chem. 1993, 32, 15, 3295–3299Publication Date (Print):July 1, 1993Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodegradation of .alpha.-olefin/carbon monoxide alternating copolymerFrank Y. Xu and James C. W. ChienCite this: Macromolecules 1993, 26, 14, 3485–3489Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1 July 1993https://p…
The texture of a cold-rolled and heat-treated 50.8 Ti 49.2 Ni (at.%) sheet has been determined and designated as [l brace]110[r brace] left angle 1 anti 10 rightangle [sub p]. According to the crystallography of the martensitic transformation in TiNi this texture would result in a maximum planar anisotropy of the tens…
Carbon grains less than 1 μm in diameter have been formed in low pressure rare-gas discharges using graphite electrodes and audio frequency excitation. The grains have been examined in situ with Mie etching scattering to determine growth rates and ex situ using scanning and transmission electron microscopies to quanti…
Cross-sectional transmission electron microscopy has been used to investigate the implanted layer in glassy carbon irradiated with 50 keV C ions to a dose of 5×1016 ions/cm2. It was found that in addition to the formation of an amorphous surface layer approximately 100 nm deep, the ion-beam modified layer was compacte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced intramolecular electron transfer in bisviologen-linked porphyrin in acetonitrileJunji Hirota and Ichiro OkuraCite this: J. Phys. Chem. 1993, 97, 26, 6867–6870Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1 J…
Abstract The title heteroarene (TBD) isoelectronic with perylene was synthesized by way of a dimerization of thieno[2,3-b]thiophene. In addition, 1,4,5,8-tetramethyl, tetraethyl, tetrakis (methylthio), and tetrakis (ethylthio) derivatives were readily obtained from TBD. An X-ray crystallographic analysis of TBD demons…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of copper(II) ethylenediamine complexes in aqueous and neat ethylenediamine solutions and solvent-exchange kinetics of the copper(II) ion in ethylenediamine as studied by EXAFS and NMR methodsYasuhiro Inada, Kazuhiko Ozutsumi, Shigenobu Funahashi, Sayo Soyama, Taku…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure of imidazolate-bridged binuclear zinc complex and its single-crystal ESR spectra doped with bridged copper-zinc complexZ. W. Mao, K. B. Yu, D. Chen, S. Y. Han, Y. X. Sui, and W. X. TangCite this: Inorg. Chem. 1993, 32, 14, 3104–3108Publication Date (Print…
We use the so-called Evans heat flow algorithm and the color conductivity algorithm to calculate the thermal conductivity, λ, and self-diffusion, D, tensors of a model liquid crystal forming fluid, the Gay–Berne fluid. We compared the conductivities of the isotropic phase, the nematic liquid crystal phase, and the sme…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcessible poly(arylene ether ketones) that can be crosslinked to high-performance networksKenneth A. Walker, Larry J. Markoski, and Jeffrey S. MooreCite this: Macromolecules 1993, 26, 14, 3713–3716Publication Date (Print):July 1, 1993Publication History Published online1 M…
The domain structure of ferroelectric or ferroelastic materials, arising as a result of the cubic-tetragonal transition inside an epitaxial layer, are considered. A thermodynamic theory of the size and arrangement of the domains has been developed. The dependence of the equilibrium domain structure on the epitaxial la…
The real nature of the mechanism of bipolaron conduction in conducting polymers and the discussion as to whether the charging–discharging currents in these materials are of a capacitive or a redox nature are central questions in conducting polymer research. Here, a number of methyl endcapped thiophene oligomers are st…