Materials Literature
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Detailed examination of the strucures of the title salts, (tpy)LnCl3.xH2O, across the totality of the rare earth series shows a remarkable interplay of structural type and detail. The predominant phase is the previously studied monoclinic Cm array, a ˜ 7.5, b ˜ 16.6, c ˜ 9.8 ?, ß = 90.2°, V ˜ 2200 ?3, Z = 2 formula un…
Abstract The structures of the noncrystalline material of four poly(ethylene terephthalate) fiber samples have been studied by analyzing the X‐ray scattering patterns. The noncrystalline scattering patterns of the three semicrystalline fibers are revealed by removal of the crystalline contribution from the diffraction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleMetal-Catalyzed Direct Hydroxy-Epoxidation of OlefinsWaldemar Adam and Markus J. RichterCite this: Acc. Chem. Res. 1994, 27, 2, 57–62Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs.acs.org/doi/1…
Experimental results and mathematical considerations were used to investigate the physical meaning and the application limits of the breakpoint method to evaluate the reactive area in organic coatings. The physical meaning of the reactive area values of a metal under an organic coating, obtained using the breakpoint m…
Amorphous materials in the form of ribbons, wires and thin films require special care to be taken in measurements of magnetostriction, the field dependence of elastic moduli and the magnetomechanical coupling factor. Problems arise in these measurements because of the sample geometry and, in some cases, because of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntercalation of [MoVIO2(O2CC(S)Ph2)2]2- in a Zn(II)-Al(III) Layered Double Hydroxide Host: A Strategy for the Heterogeneous Catalysis of the Air Oxidation of ThiolsAntonio Cervilla, Avelino Corma, Vicente Fornes, Elisa Llopis, Pedro Palanca, Fernando Rey, and Antonio Ribera…
Cu and Cu 3 Mg‐containing complexes form when the metallacrown 1 is treated with lead or magnesium nitrate, respectively. In the first reaction the sodium ion in the cavity formed by the six copper atoms of the macrocyclic host is replaced by a copper ion, which suggests the destruction of the structure of the macrocy…
ABSTRACT The relatively non‐toxic dye, rhodamine 123 (R123), was incorporated into the frustule of Thalassiosira weissflogii Grun. clone ACTIN in direct proportion to biogenic silica (BSi). R123 was used together with the DNA stain propidium iodide to track and quantify Si deposition during the cell cycle of T. weissf…
Static‐lattice calculations of the energies and structures of {10 1 n} (n = 0, 1, and 4) and {0001} grain boundaries in α‐AI 2 O 3 using three different potentials are reported. It was found that the energies of boundaries perpendicular to the (0001) direction vary between 0.3 and 0.9 J·m −2 . These compare favorably…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of Polystyrene-Poly(ethylene oxide) Block Copolymer Micelle Formation in Organic and Aqueous Solutions by Nonradiative Energy Transfer ExperimentsF. Calderara, Z. Hruska, G. Hurtrez, J. P. Lerch, T. Nugay, and G. RiessCite this: Macromolecules 1994, 27, 5, 1210…
Novel abrasion-resistant coatings prepared by a sol-gel process have been developed and applied on the polymeric substrate Bisphenol A polycarbonate. In general, coatings utilize either 4,4′-diaminodiphenyl sulfone (DDS) or diethylenetriamine (DETA) that are then functionalized at their amine groups with 3-isocyanatop…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusion of Dextran in Aqueous (Hydroxypropyl)celluloseZ. Bu and P. S. RussoCite this: Macromolecules 1994, 27, 5, 1187–1194Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs.acs.org/doi/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Novel Approach to the Study of Dissolution Kinetics Using the Scanning Electrochemical Microscope: Theory and Application to Copper Sulfate Pentahydrate Dissolution in Aqueous Sulfuric Acid SolutionsJulie V. Macpherson and Patrick R. UnwinCite this: J. Phys. Chem. 1994, 98…
ABSTRACT The effects of flow alignment on the relaxation dynamics of a lamellar dihlock copolymer melt and the dynamics of flow alignment itself are investigated using simultaneous measurements of shear stress and birefringence in both the flow plane and the sample plane. The primary advantage of this rhea-optical app…
We present a study of breakdown fields in BaxSr1−xTiO3 ceramics as functions of thickness, temperature, applied voltage ramp rate, electrode material and cross-sectional area. The data show evidence of Zener-like breakdown mechanisms. The d.c. leakage currents at voltages below breakdown are dominated by tunneling inj…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Crystal Structure, and Magnetic Properties of [Ni(N3)2(2,2-Dimethylpropane-1,3-diamine)]n, an Infinite Bidimensional Antiferromagnetic Polymer Presenting Weak 3-D FerromagnetismJoan Ribas, Montserrat Monfort, Xavier Solans, and Marc DrillonCite this: Inorg. Chem.…
Ti−Ni thin films with three different compositions (Ti−48at.%Ni, Ti−50at.%Ni and Ti−51 at.%Ni) were prepared by sputtering. The sputter-deposited films were annealed at 773 K for 1 h to achieve crystallization. The stress-strain curves for the annealed films were measured over a wide temperature range (143–473 K) usin…
Abstract The Raman and infrared wavenumbers of solid HCONH 2 and DCOND 2 were measured at 20 K and high temperatures. More peaks were observed in both the lattice and internal mode regions than were expected from the known structure, so the structure was redetermined. The resulting structure is in agreement with earli…
Five cellulolytic bacterial isolates ( Clostridium and Eubacterium spp.) from a methane‐producing landfill were examined to determine their ability to utilize newspaper as a substrate for growth. Solubilization was poor with even the most actively cellulolytic bacteria. The major factor causing the low activity seemed…
A one‐end‐closed yttria‐stabilized zirconia (YSZ) tube, which is an oxygen ion conductor, was used to remove oxygen from molten copper. A thin layer of porous cermet electrode was deposited on the inner wall of the YSZ tube. The outer surface of the tube was in contact with the melt and the inner surface with a flowin…