Materials Literature
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The effect of noisy listening conditions on the performance of simultaneous interpreters was studied by asking subjects to shadow and simultaneously interpret French prose into English at 3 signal-noise ratios. It was found that while noise had a significant effect on the proportions of texts correctly shadowed and in…
Abstract The pH‐dependent charge properties of the A and B horizons of two representative oxisols from the Cerrado Region, Brazil, were studied by a comparison of the potentiometric titration method of net charge measurement and direct measurement of anion and cation exchange capacity from K + and Cl ‐ adsorption. Mos…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic studies of carbon fiber surfaces. Part 10. Valence-band studies interpreted by X-.alpha. calculations and the differences between PAN- and pitch-based fibersYaoming Xie and Peter M. A. SherwoodCite this: Chem. Mater. 1989, 1, 4, 427–432Publi…
Crack stability and strength distribution are examined for ceramics that exhibit R‐curve behavior. An empirical power‐law description for the R curve leads to simple analytical formulations for the Weibull modulus and the scale parameter; however, the power law is inconsistent with the stability of surface cracks rece…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(carbophosphazenes): a new class of inorganic-organic macromoleculesIan Manners, Harry R. Allcock, Gerhard Renner, and Oskar NuykenCite this: J. Am. Chem. Soc. 1989, 111, 14, 5478–5480Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Publ…
Abstract The kinetics of Al precipitation/dissolution reactions in Spodosol Bs horizons from sites at Hubbard Brook, NH and Bear Brook, ME were examined. A mechanical vacuum extractor was employed to draw solutions through soil columns at solution/soil residence times between 0.3 and 100 h. Equilibrium was approached…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of a new one-dimensional sodium molybdenum phosphate polymer: structure of [(H3O)2NaMo6P4O24(OH)7]2-Robert C. Haushalter and Frank W. LaiCite this: Inorg. Chem. 1989, 28, 15, 2904–2905Publication Date (Print):July 1, 1989Publication History Published online1 May 20…
A transmission electron microscopy study of two B-site order perovskites Pb(${\mathrm{Co}}_{1/2}$${\mathrm{W}}_{1/2}$)${\mathrm{O}}_{3}$ and Pb(${\mathrm{Sc}}_{1/2}$${\mathrm{Ta}}_{1/2}$)${\mathrm{O}}_{3}$ has revealed evidence for an incommensurate phase within the antiferroelectric and ferroelectric phase, respectiv…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSulfur and selenium iodine compounds: from non-existence to significanceT. Klapoetke and J. PassmoreCite this: Acc. Chem. Res. 1989, 22, 7, 234–240Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue 1 July 1989https://pubs.acs…
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…