Materials Literature
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Abstract The Beaumont (fine, montmorillonitic, thermic Entic Pelludert) and Lake Charles (fine, montmorillonitic, thermic Typic Pelludert) soils along the Texas Gulf Coast produce only about 2 Mg rice ( Oryza sativa L.) ha −1 without N fertilizer, while the Nada soil (fine, montmorillonitic, thermic Typic Albaqualf) f…
Tempering of glass produces a state of compressive stress in surface regions which can enhance the resistance to crack initiation and growth. The objective of this study was to determine the influence of tempering on the sizes of surface cracks induced within the tempered surfaces of opaque porcelain-body porcelain di…
Aluminium trisulfonatophthalocyanine (A1PCS), a dye being widely advocated for use in photodynamic therapy, produces singlet oxygen with a quantum yield of 0.34 in oxygenated water at pH 7. Triplet A1PCS abstracts an electron from a variety of amines and phenols, the rate of electron transfer depending upon the thermo…
Values of the electrostrictive constants for the lead zirconate titanate (PZT) solid‐solution system were required to com plete the development of a thermodynamic phenomenological theory of PZT. The electrostrictive Q̄ 12 constant was meas ured as a function of composition on polycrystalline ceramic PZT samples. These…
Pure twist and symmetric tilt boundary structures applicable to zirconia (ZrO2) have been demonstrated using ionic potentials appropriate to both cubic and tetragonal ZrO2. Defect energies have been calculated for the boundary structures and these were used to determine the ratio of grain-boundary resistivity ρgb to b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of bilayer-intercalated clay films and permeation control responding to temperature, electric field, and ambient pH changesYoshio Okahata and Akiko ShimizuCite this: Langmuir 1989, 5, 4, 954–959Publication Date (Print):July 1, 1989Publication History Published on…
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…