Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-Source Precursors of Lead Titanate: Synthesis, Molecular Structure and Reactivity of Pb2Ti2(.mu.4-O)(.mu.3-O-i-Pr)2(.mu.-O-i-Pr)4(O-i-Pr)4Stephane Daniele, Renee Papiernik, Liliane G. Hubert-Pfalzgraf, Susan Jagner, and Mikael HakanssonCite this: Inorg. Chem. 1995, 34…
A review of the performance of diamond single crystals as a high heat load optical component for synchrotron x rays is given. It has been proven experimentally that the bandpass and the angular divergence of the monochromatic beam provided by a relatively thin diamond crystal used in an undulator beam are not degraded…
To study surface property-dependent human monocyte adhesion and cytokine (IL-1 beta, IL-6, TNF-alpha) production, poly(tetrafluoroethylene/hexafluoropropylene) (FEP) polymer was modified to exhibit neutral, anionic, or cationic properties by incorporating amide (CONH2) and/or carboxyl (COOH) or aminoethyl amide [CONH(…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-Domain Electron Paramagnetic Resonance as a Probe of Electron-Electron Spin-Spin Interaction in Spin-Labeled Low-Spin Iron PorphyrinsMargaret H. Rakowsky, Kundalika M. More, Alexander V. Kulikov, Gareth R. Eaton, and Sandra S. EatonCite this: J. Am. Chem. Soc. 1995, 117…
The structure of an adsorbed polymer layer in equilibrium with a dilute good solvent is considered theoretically. It is shown that under saturation conditions the tails of the polymer chains give an important contribution to the monomer density profile in the outer layer away from the wall: the tail contribution domin…
Surface composition of a series of segmented poly(siloxane urea urethane)'s have been determined by angle- and energy-dependent ESCA. The polymers are based on aminopropyl end-capped dimethylsiloxane oligomers, isophorone diisocyanate and 1,4-benzene dimethanol. Effects of segmental length and annealing on the surface…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTScalar Relativistic Effects on 17O NMR Chemical Shifts in Transition-Metal Oxo Complexes. An ab Initio ECP/DFT StudyMartin Kaupp, Vladimir G. Malkin, Olga L. Malkina, and Dennis R. SalahubCite this: J. Am. Chem. Soc. 1995, 117, 6, 1851–1852Publication Date (Print):February 1…
Artificial dielectric superlattices of SrTiO 3 /BaTiO 3 (STO/BTO) have been formed by a pulsed laser ablation technique with in situ monitoring of reflection high-energy electron diffraction (RHEED) oscillation. The superlattices with a stacking periodicity of a few unit cells show higher dielectric constant than that…
The plastic deformation of icosahedral Al-Pd-Mn single quasicrystals has been studied by in situ straining experiments in a high-voltage electron microscope at elevated temperatures. The results provide the first direct evidence for dislocation motion in quasicrystals. The dislocation velocity, for an applied stress o…
The Cu L2,3-edge x-ray absorption fine structures (XAFS) of a series of Cu samples have been recorded at the BL1A beamline of UVSOR using both electron yield and x-ray fluorescence yield techniques. XAFS measurements were simultaneously recorded in three modes: total electron yield (TEY) with specimen current, total e…
Abstract Phenolphthalein poly(ether ketone) (PEK‐C) was tested using an instrumented impact tester to determine the temperature effect on the fracture toughness K c and critical strain energy release rate G c . Two different mechanisms, namely the relaxation processes and thermal blunting of the crack tip were used to…
Abstract 1,2 : 5,6-Bis(ethylenedithio)pyracylene (2) was synthesized as an example of molecular design for a polyaromatic condensed-type donor with two ethylenedithio groups at the periphery. The redox potential of 2 indicates that this heterocycle is a reversible two-stage redox system with low oxidation potentials,…
Abstract A review of work which has been performed on high temperature polymer blends is presented. The discussion is divided into miscible and immiscible blends. It is pointed out that one problem with miscible polymer blends is that of processing in the miscible state. In the case of immiscible blends, particularly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal Structure of [Aib-COCO-Aib]Cu2: A Unique Example of Modular Self-AssemblyDarshan Ranganathan, Narendra K. Vaish, G. V. R. Chandramouli, Babu Varghese, Rajendra Bose Muthukumaran, and Periakaruppan T. ManoharanCite this: J. Am. Chem. Soc. 1995, 117, 5, 1643–1644Public…
The first evidence for a calmodulin-like protein in an archaeon, Halobacterium salinarium, is reported here. The calmodulin-like protein, with a molecular mass of 24 kDa and an estimated pI of 4.8, stimulated cyclic nucleotide phosphodiesterase in a calcium-dependent manner. This stimulation could be suppressed by cal…
The cubic–tetragonal (c–t) phase transition in ZrO2−CeO2 is studied using samples prepared by both arc melting and sintering methods. The c–t transition proceeds during isothermal annealing at temperatures between 200 and 400°C in sintered samples, whereas the transition is induced after high temperature annealing at…
Seven computer codes developed by five groups are applied to the benchmark problem 13 of the TEAM Workshop which consists of steel plates around a coil (a nonlinear magnetostatic problem). The solutions are compared with each other and with experimental results.
The effects of sintering temperature above 1000°C and of cooling rate on the microstructual development of pure and Zn‐substituted spinel lithium ferrites are discussed. The strong dependence of microstructural features on cooling rate can be explained on the basis of the precipitation of α‐Fe 2 O 3 or the formation o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Modulus and High Tg Thermally Stable Polymers from p-Ethynyl-Terminated Monomers. 3Anastasios P. Melissaris, James K. Sutter, Morton H. Litt, Daniel P. Scheiman, and Marla A. SchuermanCite this: Macromolecules 1995, 28, 4, 860–865Publication Date (Print):February 1, 199…
Abstract The temperature dependence of the I K-edge extended X-ray absorption fine-structure (EXAFS) spectra of a highly oriented iodine-containing polyvinyl alcohol (I-PVA) film was investigated in order to reveal any local structures around I. It was firstly demonstrated that an analysis of the EXAFS amplitude, whic…