Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The dielectric constant and spontaneous polarization of fine-grained BaTiO(3) prepared from powder produced by metalloorganic decomposition technology were studied. The room-temperature dielectric constant of BaTiO(3) was found to increase sharply with increase in grain size, reach a maximum at about 0.4 mum, and decr…
Microstructural morphology in A1 2 0 3 containing trace amounts (∼0.25 vol%) of a silicate‐based amorphous phase was studied, as a finction of MgO additions, using transmission electron microscopy. Incipient abnormal grains develop during hot‐pressing of undoped Al 2 O 3 powder and are characterized by a large aspect…
Abstract Biodegradable poly(α‐malic acid) ( 7 ) was synthesized by means of ring‐opening homopolymerization of malide dibenzyl ester ( 5 ), which is a cyclic dimer of β‐benzyl malate. In order to obtain a high‐molecular‐weight biodegradable lactic acid type polyester having pendent modifiable groups, ring‐opening copo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGrowth of polypropylene particles in heterogeneous Ziegler-Natta polymerizationMasahiro Kakugo, Hajime Sadatoshi, Jiro Sakai, and Masakazu YokoyamaCite this: Macromolecules 1989, 22, 7, 3172–3177Publication Date (Print):July 1, 1989Publication History Published online1 May 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicellar effects on the aggregation of tetraanionic porphyrins. Spectroscopic characterization of free-base meso-tetrakis(4-sulfonatophenyl)porphyrin, (TPPS)H2, and (TPPS)M (M = zinc(II), copper(II), and vanadyl) in aqueous micellar mediaKarl M. Kadish, G. B. Maiya, C. Araul…
Two forms of storage proteins termed "SP 1" and "SP 2", respectively, accumulate in a stage-dependent fashion in the larval hemolymph of the silkworm Bombyx mori. We have cloned and analyzed the genomic sequence encoding SP 2, an arylphorin-type storage protein. The SP 2 structural gene contains five exons spanning ov…
Two novel compounds formed by nickel(I1) hexafluoroacetylacetonate and nitronyl nitroxide radicals NITR = 2-R-4,4,5,5- tetramethyl-4,5-dihydro-1H-imidazole-l-oxy3l- oxide, with R = methyl, Me, and phenyl, Ph, were synthesized. The compound Ni(hfac)2(NITPh)2 crystallizes in the monoclinic system, space group P2,/c, wit…
Abstract A novel class of starburst molecules for making amorphous glassy organic materials, 4,4′,4″-tris(N,N-diphenylamino)triphenylamine (TDATA) and 4,4′,4″-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (MTDATA), are synthesized and characterized. Their electrochemical and electronic properties as well as uni…
The fully computer-controlled user-dedicated small-angle scattering facility JUSIFA was set up for general use at the DORIS Synchrotron Radiation Source in DESY (Hamburg). This beamline is especially designed for anomalous scattering studies of anisotropic samples in materials science and enables ASAXS studies to be u…
A novel approach to determine whether ferroresonance can occur is developed. It is based on the energy transferred from the system to the voltage transformer during the switching transient. This approach is used to develop a practical test criterion to indicate if ferroresonance can occur at a specific station. The nu…
Number of semicarbazones of 4(4′-n-alkoxybenzoyloxy) benzaldehydes are synthesized. They are cy-clized to respective amino-oxadiazoles. Both the series of compounds exhibit mesomorphism. However, the decomposition is a major problem for semicarbazones. Compounds of both the series are characterized by elemental analys…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal cluster topology. 10. Polyhedral gallium cluster anions in intermetallic phases of gallium and alkali metalsR. B. KingCite this: Inorg. Chem. 1989, 28, 14, 2796–2799Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue 1 J…
A probabilistic approach to quantifying uncertainties in the progression of severe reactor accidents is formulated and applied to the Source Term Code Package. It is shown that quantification of uncertainties at the basic level of input parameters reveals broad time-dependent uncertainties in the core melt progression…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation E. A. Kearsley; Note: Strain Invariants Expressed as Average Stretches. J. Rheol. 1 July 1989; 33…
Thermogravimetric analysis (TGA) and flow-reactor experiments were used to study sulfidation-regeneration of highly porous CuO-Al_2O_3 sorbents. In TGA studies, sulfidation of reduced sorbents produced a high-temperature form of digenite (Cu_(9+x)S_5) as the major crystalline product. When a platinum pan was used in t…
Pure (undoped) piezoelectric lead zirconate titanate (PZT) ceramic samples at compositions across the ferroelectric region of the phase diagram were prepared from sol-gel-derived fine powders. Excess lead oxide was included in the PZT powders to obtain dense (95-96% of theoretical density) ceramics with large grain si…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphoric acid on oxide carriers. 2. Surface acidity and reactivity toward olefinsGianguido Ramis, Pier Francesco Rossi, Guido Busca, Vincenzo Lorenzelli, Aldo La Ginestra, and Pasquale PatronoCite this: Langmuir 1989, 5, 4, 917–923Publication Date (Print):July 1, 1989Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic behavior in linear charge-transfer complexes. Structural and magnetic characterization of octamethylferrocene salts: [Fe(C5Me4H)2].bul.+ [A].bul.- (A = TCNE, TCNQ)Joel S. Miller, Daniel T. Glatzhofer, Dermot M. O'Hare, William M. Reiff, Animesh Chakraborty, and…
A four-spin coupling term is introduced to the pseudospin model Hamiltonian to account for the recently observed first-order phase transition in order-disorder ferroelectrics. The critical behavior is investigated and characteristic temperatures are calculated. We have also expressed the free energy in terms of micros…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of platinum loading on the photocatalytic activity and luminescence of cadmium sulfide powderToshio Uchihara, Michio Matsumura, Atsushi Yamamoto, and Hiroshi TsubomuraCite this: J. Phys. Chem. 1989, 93, 15, 5870–5874Publication Date (Print):July 1, 1989Publication His…