Materials Literature
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Abstract 10-Methylacridinium ion (AcrH+) is reduced efficiently by fatty acids (RCOOH) in the presence of a base in acetonitrile to yield 9-alkyl-10-methylacridan selectively under irradiation with visible light via photoinduced electron transfer from RCOO− to the singlet excited state of AcrH+.
Abstract Polyesterifications of adipic acid with ethylene glycol, 1,4‐butanediol, and 1,6‐hexanediol in the absence and presence of the foreign acid ( p ‐toluene sulfonic acid) as catalyst were carried out under constant reaction temperatures of 140–180°C (rather than at constant oil‐bath temperatures) and at ratios o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and crystal structure of bis[undecafluorodixenon(1+)] hexafluoronickelate(2-)Adolf Jesih, Karel Lutar, Ivan Leban, and Boris ZemvaCite this: Inorg. Chem. 1989, 28, 15, 2911–2914Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Publi…
A method to determine the magnetizing characteristic of three-phase transformers is described. In the analysis, the measured currents and voltages generated during transformer switching are used. The magnetizing characteristic is calculated from the primary currents, rather than the current through the delta winding.&…
Cable-fed five-legged core grounded-wye-to-grounded-wye transformers can cause excessively high voltages in a power system. A typical per-phase equivalent does not adequately represent a five-legged core transformer for the steady-state or transient analyses required in investigating overvoltages. A three-phase equiva…
Absorption, emission, and excitation spectra of Ce-doped Gd2 SiO5 have been measured. The emission spectrum is decomposed into two Gaussian bands corresponding to the transitions from Ce3+ 5d 2 T2 to two 4f levels of 2 F7/2 and 2 F5/2 . It is found that the energy difference between ground 2 F5/2 and 2 F7/2 levels var…
The effect of adding molybdate ions to a chloride-containing solution has been studied at different stages of pit growth under potentiostatic control. There is a critical size below which already existing pits are passivated after molybdate addition. Molybdate thus appears to be more effective in reducing pit growth w…
Previous work on Ba2TiGe2O8 crystals has shown an unusual low-temperature (∼ 223 K on cooling, ∼ 273 K on heating) phase transition. Precession x-ray photographs on Ba2TiGe2O8 single crystals show an incommensurate modulation along b*, and, for the first time, also along a*. Single crystal intensity data confirm the a…
The defect structure model in the wustite phase is considered involving the 4:l cluster as a basic defect structure unit. Interactions between defects are considered in terms of the Debye‐Hückel theory for strong electrolytes. It has been shown that the available data on wustite nonstoichiometry fit well the 4:l clust…
TeGeSnAu thin films were studied for phase change type rewritable optical disk material. Addition of Au to TeGeSn thin film shortened crystallization time. The crystallization time of Te 60 Ge 4 Sn 11 Au 25 thin film was about 0.3 µs and was less than one 100th of that of Te 80 Ge 5 Sn 15 thin film. Formation of a sim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductor olefin adducts. Photoluminescent properties of cadmium sulfide and cadmium selenide in the presence of butenesGerald J. Meyer, Larry K. Leung, Jim C. Yu, George C. Lisensky, and Arthur B. EllisCite this: J. Am. Chem. Soc. 1989, 111, 14, 5146–5148Publication Dat…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text H. Angus Macleod, "THIN FILM OPTICAL COATINGS," Optics News 15(7), 9-10 (1989) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save…
This paper is intended to reflect the development of liquid crystal research, rather than to present a detailed historical survey. The author has been involved in this field for some 30 years as a member of the Halle Liquid Crystal Group. There has been a remarkable continuity in liquid-crystal research at the Univers…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of the electronic structures of chromate, halochromates, and chromyl halides by the X.alpha. methodR. M. Miller, D. S. Tinti, and D. A. CaseCite this: Inorg. Chem. 1989, 28, 14, 2738–2743Publication Date (Print):July 1, 1989Publication History Published online1 Ma…
The effect of N 2 ‐gas pressure on the liquid filling of large pores (20 to 120 μm in diameter) is studied in sintered β′‐sialon ( z = 1). The initially sintered sialon with large pores is sintered again and infitrated by a liquid (41A1 2 O 3 ‐41Y 2 O 3 ‐14Si 3 Y 4 ‐4AIN (wt%)) at 17800°C for various times under 0.1‐,…
Abstracts This paper examines the synthesis of a toughened elastomer from Vernonia galamensis seed oil by reacting vernonia oil with vernonia oil‐derived suberic acid (octanedioic acid), and cross‐linking the pre‐polymer in the immediate presence of cross‐linked polystyrene prepared in situ. The paper also demonstrate…
Cross-sectional views of iron ion-implanted gallium arsenide to doses of 4×1014 cm−2 and 1×1015 cm−2 were observed by transmission electron microscopy before and after annealing at 673 K. Microtwins were formed below the surface by implantation of 4×1014 ions cm−2. In the sample implanted to the dose of 1×1015 cm−2 ,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOne-electron oxidation of 6-substituted benzo[a]pyrenes by manganic acetate. A model for metabolic activationPaolo Cremonesi, Ercole L. Cavalieri, and Eleanor G. RoganCite this: J. Org. Chem. 1989, 54, 15, 3561–3570Publication Date (Print):July 1, 1989Publication History Pub…
The upper and lower limits of the electrostrictive constants, dielectric permittivities, spontaneous polarizations, and piezoelectric coefficients were calculated for ceramic PbTiO(3) from theoretical single-crystal constants. Experimental ceramic data fall between these upper and lower limits. The large piezoelectric…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of particulate opaque silica gels from highly acidic solutions of tetramethoxysilaneHiromitsu Kozuka and Sumio SakkaCite this: Chem. Mater. 1989, 1, 4, 398–404Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue 1 Jul…