Materials Literature
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A dual‐porosity, agglomerate‐type model for the porous anode and cathode of the molten carbonate fuel cell is developed and used to predict electrode performance in a small, differential‐conversion, cell. The model is based on a phenomenological treatment of mass transport, electrode kinetics, and ionic conduction, co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature of iron(I) and iron(0) tetraphenylporphyrin complexes. Synthesis and molecular structure of (dibenzo-18-crown-6)bis(tetrahydrofuran)sodium (meso-tetraphenylporphinato)ferrate and bis[tris(tetrahydrofuran)sodium] (meso-tetraphenylporphinato)ferrateToshio Mashiko, Chris…
Abstract Fifty-three samples from the Oxford, Kimmeridge and Speeton Clays of the Yorkshire area have been analysed petrographically and geochemically, by X-ray diffraction, X-ray fluorescence, atomic absorption and combustion (TOC). Major elements and the following trace elements have been determined: Rb, Sr, Ba, Cr,…
The crystallization mechanism in a modified Li 2 O‐Al 2 O 3 ‐SiO 2 glass containing P 2 O 5 nucleating agent was investigated by transmission electron microscopy, X‐ray diffraction, and differential thermal analysis. During an initial 1000°C treatment P 2 0 5 and Li 2 O react to precipitate Li 3 PO 4 crystallites. At…
Alumina powders containing controlled amounts of hard aggregates exhibit isothermal shrinkage rates which decrease markedly with increasing aggregate content. Sintered densities achieved after 1‐ and 24‐h anneals decreased linearly with aggregate content. The microstructures of regions near aggregates and within aggre…
Enthalpies of solution of framework aluminosilicate glasses x M l/ n n + AlO 2 ‐(1‐ x )SiO 2 (M = Cs, Rb, K, Na, Li, Ba, Pb, Sr, Ca, Mg) in molten 2PbO.B 2 O 3 near 973 K were measured. The sequence above represents increasing ability of the nonframework cation M to bond to the bridging oxygen. In that sequence, the e…
The iron loss improvement which produces the highest grade of non-oriented Si steel is described on the basis of studies which clarify the effects of Si content, grain diameter, impurities and crystalline texture on the iron loss. Impurities were found to increase iron loss directly through magnetic domains and indire…
Optical-absorption and emission spectra are presented for ${\mathrm{Ho}}^{3+}$ ions in fluorozirconate (ZBLA) glass [the nominal composition of ZBLA glass (in mol%) is 57, ${\mathrm{ZrF}}_{4}$; 34, ${\mathrm{BaF}}_{2}$; 5, ${\mathrm{LaF}}_{3}$; and 4, ${\mathrm{AlF}}_{3}$]. The measured oscillator strengths and radiat…
Abstract Double-cation hydroxy compounds, generally with the pyroaurite-type structure, were synthesized by a reaction involving the hydrolysis of a cation in solution by a fully hydrolysed and precipitated hydroxide of a second metallic cation. Synthesis of this type of compound is not limited to reactions between di…
Bovine pericardial tissue and tissue-derived bioprosthesis fixed in glutaraldehyde and stored in either glutaraldehyde or formaldehyde can induce cytotoxic reactions even after prolonged washing due to the slow leaching of the chemicals used for crosslinking and sterilizing. Sequential rinsing for up to 60 min was sti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFine-branching structure in high-pressure, low-density polyethylenes by 50.10-MHz carbon-13 NMR analysisTakao Usami and Shigeru TakayamaCite this: Macromolecules 1984, 17, 9, 1756–1761Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the role of intermolecular hydrogen bonding in miscible polymer blendsE. J. Moskala, S. E. Howe, Paul C. Painter, and Michael M. ColemanCite this: Macromolecules 1984, 17, 9, 1671–1678Publication Date (Print):September 1, 1984Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal ion encapsulation: cobalt cages derived from polyamines, formaldehyde, and nitromethaneR. J. Geue, T. W. Hambley, J. M. Harrowfield, A. M. Sargeson, and M. R. SnowCite this: J. Am. Chem. Soc. 1984, 106, 19, 5478–5488Publication Date (Print):September 1, 1984Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrap-controlled hopping transportD. M. Pai, J. F. Yanus, and M. StolkaCite this: J. Phys. Chem. 1984, 88, 20, 4714–4717Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/j…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituent effects in the electropolymerization of aromatic heterocyclic compoundsRobert J. Waltman, A. F. Diaz, and Joachim BargonCite this: J. Phys. Chem. 1984, 88, 19, 4343–4346Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Publis…
Changes in bacterial surface hydrophobicity, charge, and degree of irreversible binding to glass surfaces of seven marine isolates were followed during starvation. The degree of hydrophobicity was measured by hydrophobic interaction chromatography and by two-phase separation in a hexadecane-water system, whereas chang…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrodynamic thickness of adsorbed polymer layersM. A. Cohen Stuart, F. H. W. H. Waajen, T. Cosgrove, B. Vincent, and T. L. CrowleyCite this: Macromolecules 1984, 17, 9, 1825–1830Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHole transport in solid solutions of a diamine in polycarbonateM. Stolka, J. F. Yanus, and D. M. PaiCite this: J. Phys. Chem. 1984, 88, 20, 4707–4714Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984http…
This article comments on the increasing importance of the use of admixtures for concrete, mortars and grouts as well as the specific effects they produce, thus requiring a suitable Spanish Normative, whose performance was taken in charge by a Working Group of the Technical Commission n.° 83 from the IRANOR, created fo…
In previous work on galvanized reinforcements in contact with Ca-containing highly alkaline media, the authors have reported the existence of a threshold pH below with such a medium is passivated, but at pH values above this it corrodes continuously until it totally disappears. In this paper, after a brief literature…