Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and dynamics of a rod/sphere composite liquidMark A. Tracy and R. PecoraCite this: Macromolecules 1992, 25, 1, 337–349Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pu…
The structure of the solvated lithium cation in acetone solutions has been investigated using Raman spectroscopy. Two bands at 1220 and 1238 cm–1 have been assigned to two types of asymmetric carbon–carbon stretching vibration of acetone: the former is from the bulk solvent and the latter arises from acetone molecules…
A number of substituted aryloxycyclotriphosphazenes were synthesized and studied, with the objective of meeting the lubricant requirements of the Integrated High Performance Turbine Engine Technology (IHPTET) initiative. These compounds were evaluated for pour point, oxidative stability, and lubricity behavior. Furthe…
Abstract
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix isolation ESR and theoretical investigations of 11B14N11B and 10B14N11B: laser vaporization generationLon B. Knight Jr., Devon W. Hill, T. J. Kirk, and C. A. ArringtonCite this: J. Phys. Chem. 1992, 96, 2, 555–561Publication Date (Print):January 1, 1992Publication His…
BaTiO3-Ni mixed powders were sintered at 1300°C in Ar or air, and the sintering behavior and dielectric properties were investigated. The bulk density of sintered bodies was 95-99% of theoretical. BaTiO3-Ni composites were produced in Ar. When coarse Ni powder (4-7μm) and ultrafine BaTiO3 powder (0.02μm) were used, a…
The crystal structure of the ζ2′ Au-49.5 at%Cd martensite, which has been controversial for 50 years, has been determined by using single crystal data collected by four-circle diffractometer with Mo Kα radiation. The space group is P3, trigonal, which has no center of symmetry. This result is in disagreement with that…
Bone and several other vertebrate mineralized tissues are formed by the organized growth of crystals of carbonated apatite within a matrix of type 1 collagen fibers. The development of this process in isolated fibrils of young turkey leg tendons has been studied by transmission electron microscopy. Collagen banding, p…
Several cationic porphyrins are known to bind to DNA by intercalative and outside binding modes. This study identifies the cis and trans isomers of bis(N-methyl-4-phridiniumyl)diphenyl porphyrin as DNA intercalators based on evidence from a DNA topoisomerase I assay. Moreover, both isomers are shown to be potent photo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid crystalline aromatic polyesters derived from 2,5-thiopheneRubing Cai, Jack Preston, and Edward T. SamulskiCite this: Macromolecules 1992, 25, 2, 563–568Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 19…
A new absorbable polymer prepared from polyhydroxybutyrate (PHB) was inserted as a pericardial patch in sheep to serve as a temporary scaffold for regeneration of pericardial tissue. Postoperative adhesions were rare or absent. The present study focuses on characterization of the regenerated surface cells. The luminal…
The effect of the temperature of reduction by H2 of Pd/CeO2 catalysts on the accessibility of the metal to carbon monoxide adsorption has been estimated from a study of the integrated intensity of the ν(CO) absorption bands. No adsorption occurred when the reduction temperature was higher than 673 K; the behaviour of…
Biochemical Aspects of Microbial Oxidation of Inorganic Sulfur Compounds (Susumu Takakuwa). Sulfur Ligand in Metalloproteins and Metalloenzymes (Norikazu Ueyama and Akira Nakamura). Biochemical Reactions Involving Thioesters (Kenji Ogino and Hisashi Fujihara). Biochemistry of Disulfide (Yong Hae Kim). Oxygenation and…
The existence of superconductivity in chiral molecular systems is suggested by studies of the title compound. The work, which is an important extension of studies of recently organic superconductors based on unsymmetrical molecules, shows that a sudden, but incomplete loss of resistivity (by a factor of 500) takes pla…
Ferromagnetism in non-metallic solids is quite a rare property. In solids containing molecular building blocks it is even rarer. One strategy for preparing ionic ferromagnets is to combine a low-dimensional continuous lattice containing transition-metal ions with organic molecular ions. In this article we review the s…
Properties of α-alumina surface, dissociated fraction of polyacrylic acid, and the interaction between alumina surface and polyacrylic acid were investigated in aqueous suspensions in the pH range of 2.2 to 10.5. The isoelectric point of the colloidal α-alumina particles was pH 7.7, and the surface was charged positiv…
For pt.IX see ibid., vol.7, no.6, p.5 et seq. (1991). An overview of engineering practice related to partial discharge (PD) measurements in gas-insulated substations (GISs) is provided. The following questions are addressed: why measure PD in GIS?; in which phases of the life cycle should PD be measured?; what PD meas…
The use of an imaging plate as a two-dimensional (2-D) detector removes many of the difficulties that arise in performing angle-dispersive powder diffraction at high pressures in a diamond-anvil cell. Due to the 2-D nature of the imaging plate, a substantial part of each Debye Scherrer ring is intercepted and recorded…
The introduction of a metal into a mesogenic molecule can result in a complex with interesting electrical and magnetic properties. By reacting the non‐mesogenic cyclic amine shown in the figure with Ni(NO 3 ) 2 · 6H 2 O in absolute THF the first member of a new class of columnar liquid‐crystalline metal complexes with…
The effect of γ\ ightleftarrowsε cyclic transformation on the subsequent γ→ε martensitic transformation has been studied in an Fe-24%Mn-6%Si shape memory alloy in order to obtain fundamental information on the role of Si in the shape memory effect. The γ→ε martensitic transformation is markedly enhanced by the thermal…