Materials Literature
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Using a crossed-beam method, we have measured electron-energy-loss spectra for the excitation of the Schumann-Runge continuum of molecular oxygen. The scattering angle and electron-impact energy ranges covered were 12\ifmmode^\circ\else\textdegree\fi{}--156\ifmmode^\circ\else\textdegree\fi{} and 15--50 eV, respectivel…
Abstract NiCr2O4, ZnCr2O4, CuCr2O4, CuAl2O4, and CuFe2O4 were prepared and characterized by XRD, DRS, and IR and by measurements of surface area, acidity, and electrical conductivity. XRD analysis indicates, that chromites, aluminate, and ferrite have normal, partially inversed, and inversed spinel structure, respecti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVerdoheme-like Oxaporphyrin Formation by Oxygenation of a Co(II) Porphyrinyl Naphthoic Acid. A New Model of Heme DegradationC. K. Chang, Gladys Aviles, and Nilkamal BagCite this: J. Am. Chem. Soc. 1994, 116, 26, 12127–12128Publication Date (Print):December 1, 1994Publication…
Abstract A one‐pot synthesis of polytitanosiloxanes (PTS) and its transformation to SiO 2 –TiO 2 ceramic fibers were investigated. PTS was prepared by the hydrolysis of tetraethoxysilane followed by the reaction with bis(2,4‐pentanedionato)titanium diisopropoxide in methanol in 33–95 SiO 2 mol %. PTS was considered to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Orientation and Surface Morphology in Methyl Iodide Films Grown on MgO(100) Probed by PhotodissociationD. Howard Fairbrother, K. A. Briggman, P. C. Stair, and Eric WeitzCite this: J. Phys. Chem. 1994, 98, 49, 13042–13049Publication Date (Print):December 1, 1994Publ…
Abstract The electrical conductivity of solution‐grown ethyl cellulose (EC) films, 5–30 μm thick, has been studied in the sandwich configuration (metal–EC–metal) as a function of iodine concentration from 0.5 to 5.0 wt% ratio. The studies were conducted in the temperature range 333–383 K, while the field was varied ov…
The intersystem crossing rates from the high-spin (5T2) to the low-spin (1A1) state in the spin–crossover systems [M:Fe(pic)3]Cl2⋅Sol, M=Zn or Mn, Sol=MeOH or EtOH have been measured in the temperature range between 5 and 170 K. Within the series of investigated compounds, the low-temperature rates are strongly correl…
The new compound, KCr 3 (SO 4 ) 2 (OH) 6 , was prepared by low-hydrothermal synthesis. The structure was refined by the Rietveld technique in space group ( Z = 3), a =7.2416(3) Å, c = 17.0788(9) Å, V = 775.63 Å 3 , R p = 7.7, R wp =10.1, R B = 6.8. The compound is isotypic with alunite, KAl 3 (SO 4 ) 2 (OH) 6 . The te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Surface-Functionalized 1,2-Polybutadiene Bearing Hydroxyl or Carboxylic Acid GroupsDeborah H. Carey and Gregory S. FergusonCite this: Macromolecules 1994, 27, 25, 7254–7266Publication Date (Print):December 1, 1994Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Structure, and Electrochemistry of Palladium Complexes with Camphor-Derived Chiral LigandsM. Fernanda N. N. Carvalho, Luciana M. G. Costa, Armando J. L. Pombeiro, Annette Schier, Wolfgang Scherer, Siamak Khalili Harbi, Uwe Verfuerth, and Rudolf HerrmannCite this:…
A new method using laser Doppler anemometry (LDA) was employed to measure the force history of (0° 2 /90° 2 ). E-glass/epoxy laminates struck by hemispherically tipped projectiles. The striking velocity of the 35.5 g projectiles ranged from 18 m/s to 80 m/s. The ballistic limit for these 2.8 mm thick laminates was at…
Article Kinetic Studies of Unirradiated UO2 Dissolution under Oxidizing Conditions in Batch and Flow Experiments was published on December 1, 1994 in the journal Radiochimica Acta (volume 66-67, issue Supplement).
We present an explanation for the observation of Ajayan and Iijima in 1993 that liquid lead inside carbon nanotubes of small diameters remains disordered, whereas inside tubes of larger diameters it crystallizes. We show that there exists a critical radius for the nanotubes such that in the tubes of smaller radius the…
Eleven species of Achnanthes from Signy Island, South Orkney Islands are described including one new species. Benthic algal material from a range of shallow lakes of varying trophic status was examined by light microscopy and scanning electron microscopy. Detail of morphology is provided with an overview of the taxono…
Ruthenium dioxide (RuO 2 ) films are studied for use as a bottom electrode of the (Ba, Sr)TiO 3 thin-film capacitor. RuO 2 films have been deposited by reactive DC magnetron sputtering of ruthenium at a relatively low sputtering power. Stoichiometric RuO 2 films are obtained at oxygen partial pressures as low as 0.6 m…
The oxidation behaviors of IG-110 and PGX graphites were experimentally investigated in the temperature range from 500 to 1,500°C for the oxygen concentration of 10 and 30 wt% (1.37 and 5.09 mol%) and the reacting gas velocities of 6.63 and 19.9 m/s (estimated at 900°C). The graphite specimens were prepared to simulat…
Abstract Poly(phenylene sulfide) (PPS) is a semicrystalline engineering resin with exceptional solvent resistance and thermal performance. Properties such as these are directly related to the high crystallinity of PPS. In order to exploit its crystalline nature, PPS should be molded at a high tool temperature (hot oil…
We show that IgG molecules isolated from the serum of rabbits injected with crystals of monosodium urate monohydrate, magnesium urate octahydrate and allopurinol, can each catalyze the nucleation of the same type of crystal to which they were exposed. These results generalize previous findings related to monosodium ur…
Abstract “Surface‐photografting” with UV‐irradiation of polypropylene (PP) fiber and film and high‐strength polyethylene (HSPE) yarn has been made with acrylic acid (AA) and acrylamide (AM) as monomers and benzophenone (BP), 4‐chlorobenzophenone (4‐BCP) and hydroxylcyclohexylacetophenone (HHA) as photoinitiators using…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInclusion Polymerization within a Tris(2,3-naphthylenedioxy)cyclotriphosphazene ClathrateHarry R. Allcock, Eric N. Silverberg, Gary K. Dudley, and Shawn R. PucherCite this: Macromolecules 1994, 27, 26, 7550–7555Publication Date (Print):December 1, 1994Publication History Pub…