Materials Literature
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Abstract The frequencies of the wurtzite‐like modes due to Li–O and Ga–O bond vibrations in LiGaO 2 and of the rocksalt‐like mode due to Li–O bond vibrations in LiInO 2 are determined from the infrared reflectivity spectra of the compounds. The force constants for the Li–O and Ga–O bonds in LiGaO 2 follow the same tre…
AbstractThe development of microstructure and crystallographic texture in an AA 3004 alloy during fiat rolling at elevated temperature has been investigated. A significant feature of the microstructure was the presence of banding associated with inhomogeneous deformation. The planes defining this banding were often in…
Abstract Six deferrated clay (<2 µm) samples from the major B horizons of pedons derived from basaltic pyroclasts (Western Cameroon) were selected. These soil clays, which differ mainly in their contents of halloysite and kaolinite, represent the types of secondary constituents characteristic of different weatherin…
Abstract The dynamic bulk modulus of elasticity has been measured for 14 different rubbery elastomers: three natural rubbers, five neoprenes, three polyurethanes, and one each of butyl, nitrile, and butadiene types. The measurements ranged in temperature from −10 to +40°C, at frequencies from 5 to 3000 Hz, but mostly…
Abstract The crystalline structures of “microlayer” and “nanolayer” polyethylene have been examined in coextruded films comprised of alternating layers of high‐density polyethylene and polystyrene. Transmission electron microscopy (TEM), small‐angle x‐ray scattering (SAXS), and wide‐angle x‐ray scattering (WAXS) revea…
In the Y 2 O 3 –Al 2 O 3 –B 2 O 3 system, homogeneous glasses were obtained from compositions containing from 50 to 65 mol% B 2 O 3 . The density, refractive index, and thermal expansion increase as Y 2 O 3 replaces either B 2 O 3 or Al 2 O 3 . These glasses have a dilatometric softening temperature above 665°, and be…
Abstract Polymer blends have received particular interest in the past several decades in both industrial and academic research. An initial survey of miscible polymer pairs (1) (1968) revealed 12 combinations. A later survey (2) (1979) noted approximately 180 miscible pairs. Today possibly over 500 miscible combination…
Abstract Acrylic monomers with a cyclic carbonate function, their synthesis having been described previously, are used to synthesize copolymers with pendent cyclic carbonate side groups. Their chemical modification by ring opening addition reactions provides a convenient method for preparing functional polymers. The s…
(1990). STRUCTURE/PROPERTY RELATIONSHIPS IN TEXTILE FIBRES. Textile Progress: Vol. 20, No. 4, pp. 1-43.
Feather meal contains three sulfur amino acids: cystine, lanthionine, and methionine. Procedures were investigated to determine the best conditions for quantitating the sulfur amino acids in feather meal. To separate the sulfur amino acids by ion exchange chromatography, an elution system using 100 mM citrate buffer a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBase binding to zinc picket fence porphyrins. Attractive intramolecular interactions in organic solventsHiroyasu Imai and Eishin KyunoCite this: Inorg. Chem. 1990, 29, 13, 2416–2422Publication Date (Print):June 1, 1990Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExtraction of polymer properties from oligomer calculationsC. X. Cui, Miklos. Kertesz, and Y. JiangCite this: J. Phys. Chem. 1990, 94, 12, 5172–5179Publication Date (Print):June 1, 1990Publication History Published online1 May 2002Published inissue 1 June 1990https://pubs.ac…
The tris (methylammonium) nonaiododiantimonate (III) crystals were grown. The preliminary X-ray diffraction studies showed that at room temperature they are isomorphous with Cs3Sb2I9. The crystals are hexagonal, space group P63/mmc with the unit cell parameters; a = 8.543 (1), c = 21.520 (7) å, Z = 2, V = 1360 Å3. The…
ABSTRACT Pterosperma cristatum Schiller, a member of the Pra‐sinophyceae, was examined with light and electron microscopy with special attention on the absolute configuration of flagellar apparatus components and associated structures. This alga is characterized by asymmetrically arranged basal bodies, connecting fibe…
Abstract A new type of multicomponent thermoplastic elastomers is prepared by attaching 4‐(3,5‐dioxo‐1,2,4‐triazolin‐4‐yl)benzoic acid to polybutadiene chains. The groups are difunctional with respect to a potential chain‐molecule formation via reversible association. Thus, a covalent polymer is combined with an assoc…
Gadolinium-DTPA (Gd-DTPA) liposomes have been studied previously as liver contrast agents and have been shown to improve the detection of hepatic metastases in rats. We synthesized 100-nm and 50-nm liposomes that encapsulated Gd-DTPA and did biodistribution and clearance studies in rats. Parallel magnetic resonance im…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and spectroscopic properties of five-coordinate (2-methylimidazolato)- and six-coordinate (imidazole)(imidazolato)iron(II) "picket-fence" porphyrinsD. Mandon, F. Ott-Woelfel, J. Fischer, R. Weiss, E. Bill, and A. X. TrautweinCite this: Inorg. Chem. 1990, 29, 13, 24…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSwitching between solid-state electroactivity, coupled with ionic conductivity, and semiconducting or dielectric properties in dry mixed-metal hexacyanoferrate powdersPawel J. KuleszaCite this: Inorg. Chem. 1990, 29, 13, 2395–2397Publication Date (Print):June 1, 1990Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of dielectric and viscoelastic relaxation spectra of polyisopreneKeiichiro Adachi, Hirotsugu Yoshida, Fumiaki Fukui, and Tadao KotakaCite this: Macromolecules 1990, 23, 12, 3138–3144Publication Date (Print):June 1, 1990Publication History Published online1 May 200…
The optical transmission of transparent polycrystaliine La 2 O 3 strengthened Y 2 O 3 was measured in both the near‐ultraviolet and infrared regions at temperatures between 20° and 1400°C. The absorption remains low until about 900°C, but rises almost exponentially thereafter. The magnitude of this increase is a funct…