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。
Abstract Depending on the size of the pores and on the temperature and pressure of the fluid, flow in microporous materials can be through gas diffusion, surface diffusion, and viscous liquid flow driven by capillary forces or by hydraulic pressure. We have studied these flow regimes with toluene in untreated Vycor gl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer-precursor routes to metal borides: synthesis of titanium boride (TiB2) and zirconium boride (ZrB2)Kai Su and Larry G. SneddonCite this: Chem. Mater. 1991, 3, 1, 10–12Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published iniss…
The chemistry of the surface of activated carbon has been analysed. Five activated carbons obtained by a modification of raw carbon were investigated. The following techniques were employed: elemental analysis, acid—base reactions, thermal decomposition, IR spectroscopy, calorimetric heat determination, wetting with w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-phase model for continuous final stage melt polycondensation of poly(ethylene terephthalate). 1. Steady-state analysisClaude Laubriet, Brice LeCorre, and Kyu Yong ChoiCite this: Ind. Eng. Chem. Res. 1991, 30, 1, 2–12Publication Date (Print):January 1, 1991Publication His…
An extract of the seed of Sandoricum koetjape has yielded two new limonoids, sandoricin [1] and 6-hydroxysandoricin [2]. Both compounds are effective antifeedants when incorporated into artificial diets and fed to fall armyworm (Spodoptera frugiperda) or European corn borer (Ostrina nubilalis) larvae. Reduced growth r…
As described in a previous paper (Wright and Adams, 1990), with the advent of new techniques it has become practical to consider using single orientation measurements for texture investigations. Advantages of using single orientations measurements over the traditional bulk measurement using pole figures are: direct ac…
Theoretical models for rail internal self-inductance and resistance are proposed which include material saturation and hysteresis. Model data are obtained using experimentally derived ferromagnetic material B-H loops. Analytical methods for deriving the impedance variations with current and frequency for large-signal…
Alpha-zirconium is a very poor solvent for most alloying metals. Moreover, it has a high affinity for these metals. Consequently, intermetallics are easily formed and highly visible in zirconium and its alloys. Many researchers believe that the corrosion resistance of zirconium and its alloys depends strongly on the d…
We show that the classical variants of the integral method for single-and multiple-coated gratings are not optimal with respect to their computational cost. More economical variants are presented here. Further we describe an integral method for gratings with partial overcoated surfaces.
Abstract Cost effective loss prevention requires an optimizing strategy to prevent, moderate (relieve) and contain runaway reactions. Ensuring that an emergency relief system design will either avoid or accommodate two‐phase vapor‐liquid flow is of particular importance. Use of adiabatic runaway reaction test informat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnergy- and electron-transfer shuttling by a soluble, bifunctional redox polymerJanet N. Younathan, Wayne E. Jones Jr., and Thomas J. MeyerCite this: J. Phys. Chem. 1991, 95, 1, 488–492Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Publ…
Une nouvelle méthode non destructive, pour la mesure des densités de charges d'espace dans les isolants solides, est décrite. Cette méthode, dite de “ l'onde thermique ” est basée sur la diffusion d'un front de chaleur appliqué à une des faces de l'éprouvette et sur la dilatation non uniforme qui en résulte. A partir…
The nature of the species that gives rise to living carbocationic polymerization (LP+Pzn) of isobutylene (IB) coinitiated by Friedel-Crafts acids (FCA) in the presence of electron pair donors (ED) has been investigated. It is proposed that the key species responsible for mediating LC+Pzn of IB are FCA·ED complexes, fo…
A new model for fabric hand assessment is developed that uses fuzzy comprehensive evaluation to predict hand. One of the main aspects of this research is the establishment of a fuzzy relation matrix R for objective evaluation of fabric hand. This was achieved by investigating a large number ( n = 100) of light weight…
Electrochemical preparation of β-MnO2-incorporated polypyrrole films resulted in high energy capacity cathode-active materials for rechargeable lithium batteries.
The crystallization kinetics of chalcogenide films, to which small concentrations of foreign elements such as Cu, Co, Pb, Ag and Sb are added, were investigated theoretically. It is found that the critical cooling rate can be taken as the criterion for evaluating the roles of various elements on the erasure speed. Sin…
The recently reported paramagnetic compounds (dbdab)2M (dbdab = 1,4-di-tert-butyl-1,4-diazabutadiene, M = Ga, Al), both contain trivalent metal bound to one singly and one doubly reduced dbdab ligand; the larger metal hyperfine coupling in the EPR spectrum of the gallium complex is not due to a gallium(II) oxidation s…
The reaction of (But)3Ga with an excess of H2S in pentane at ambient temperature results in the formation of the hydrosulphido bridged dimer [(But)2Ga(µ-SH)]2, 1, which upon mild thermolysis is converted to the cubic tetramer [(But)GaS]42. Compounds 1 and 2 have been characterized by IR, NMR and mass spectroscopy and…
Picosecond time resolved luminescence was employed for monitoring the decay of electronic excited reactants on the surface of oxide semiconductors. Decay of cresyl violet monomers was determined on TiO2 and on α-Al2O3 by measuring decay curves over a wide range of very low coverages. The decay curves showed a characte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin and spinless conductivity in polypyrrole. Evidence for mixed-valence conductionG. Zotti and G. SchiavonCite this: Chem. Mater. 1991, 3, 1, 62–65Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https://…