Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPerchlorinated phthalocyanines: spectroscopic properties and surface electrochemistryM. Neal Golovin, Penny Seymour, Karupiah Jayaraj, Yan Song Fu, and A. B. P. LeverCite this: Inorg. Chem. 1990, 29, 9, 1719–1727Publication Date (Print):May 1, 1990Publication History Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and magnetic and spectroscopic properties of a nickelIIcopperIInickelII trinuclear speciesJuan Ribas, Carmen Diaz, Ramon Costa, Yves Journaux, Corine Mathoniere, Olivier Kahn, and Alain GleizesCite this: Inorg. Chem. 1990, 29, 11, 2042–2047Publication Date (Print):…
Abstract A constitutive theory, which consists of the constitutive equation and the transformation kinetics, is proposed to describe the thermomechanical behaviors of the shape memory alloys. Simulation in Ti-Ni alloy proves a good applicability of the theory when the overall characteristics of the stress-strain-tempe…
Models of athermal self-avoiding fluid and polymerized vesicles have been investigated by Monte Carlo simulations. There is no evidence for crumpling of polymerized vesicles, and the squared radius of gyration is proportional to the number of monomers on the surface, ${\mathit{R}}^{2}$\ensuremath{\sim}N. Fluid vesicle…
Adsorption of the corrosion inhibitor benzotriazole (BTA) from solution has been studied on well-characterized electrochemically prepared Cu surfaces. In situ ellipsometry and ex situ x-ray photoelectron spectroscopy (XPS) have been used to probe both the nature of the Cu surfaces prior to BTA adsorption and to determ…
An x-ray crystallographic refinement method, referred to as the normal mode refinement, is proposed. The Debye-Waller factor is expanded in terms of the effective normal modes whose amplitudes and eigenvectors are experimentally determined by the crystallographic refinement. In contrast to the conventional method, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe coordination geometry of gaseous hexamethyltungsten is not octahedralArne Haaland, Andreas Hammel, Kristin Rypdal, and Hans V. VoldenCite this: J. Am. Chem. Soc. 1990, 112, 11, 4547–4549Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Pub…
A vacancy-relaxation model is proposed. It predicts the DC lifetime, pulse DC (arbitrary unidirectional waveform) lifetime, pure AC lifetime, and AC-plus-DC-bias lifetime for all waveforms and all frequencies above 1 kHz. The predictions are verified by experiments and significantly raise the projected lifetimes beyon…
The major developments in our understanding of polymer crystals and the kinetics of their formation have been many. It is now established that adjacent re-entry folding of the molecule occurs on crystallisation from solution, but when crystallised from the melt the molecular trajectory approximates a random coil when…
Tissue reactions toward biodegradable poly(L-lactic acid) implants were monitored by studying the activity pattern of seven enzymes as a function of time: alkaline phosphatase, acid phosphatase, alpha-naphthylacetyl esterase, beta-glucuronidase, ATP-ase, NADH-reductase, and lactate dehydrogenase. Cell types were ident…
Abstract The pH value of an adsorption edge (i.e., the pH value where a change occurs in the amount of aqueous ions adsorbed by a solid phase) is dependent on the surface‐metal bonding strength and, consequently, on the type of adsorption site involved. The metal‐adsorption sites of natural (untreated) kaolinite, mont…
Macromolecules
Dextran covalently linked to moieties of gadolinium diethylenetriamine pentaacetic acid (DTPA), for use as a macromolecular, intravascular blood pool marker for contrast material-enhanced magnetic resonance (MR) imaging was characterized by means of physicochemical and relaxivity measurements and MR imaging in healthy…
Boron-doped homo-epitaxial films were deposited by microwave plasma CVD on synthesized single-crystal diamonds. Boron concentration in the films was determined by the boron concentration in the reactant gases. The crystallinity of boron- doped films was found to be affected by the boron concentration in the reactant g…
Fasciclin I is a membrane-associated glycoprotein that is regionally expressed on a subset of fasciculating axons during neuronal development in insects; it is expressed on apposing cell surfaces, suggesting a role in specific cell adhesion. In this paper we show that Drosophila fasciclin I is a novel homophilic cell…
Auger electron spectroscopy (AES) was used to characterize laboratory produced bronze plated steel sheets and AES and x-ray photoelectron spectroscopy (XPS) were used to investigate the interphase layer between these sheets and rubber. These sheets were produced to simulate bronze coated steel wire used in tire beads.…
Magnetic and mechanical properties have been studied and compared for rotary forged aluminum compacts containing MQI and MQIII (isotropic and anisotropic melt-spun Nd-Fe-B, respectively) in the as-forged condition, and after subsequent heat treatment both above and below the Curie point. A maximum coercivity of 1165 k…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcimer formation in sterically hindered poly(9-vinylcarbazole) and its dimer model compoundsShinzaburo Ito, Kazukiyo Takami, Yoshinobu Tsujii, and Masahide YamamotoCite this: Macromolecules 1990, 23, 10, 2666–2673Publication Date (Print):May 1, 1990Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of carbon atom bridged heterocyclic polymers of specified conjugation length. 1. Novel polyterthiophenesSamson A. JenekheCite this: Macromolecules 1990, 23, 11, 2848–2854Publication Date (Print):May 1, 1990Publication History Published online1…
Abstract Potassium‐Ca and NH 4 ‐Ca exchange reactions in soils are often investigated in laboratory‐type studies. In these studies, it is assumed that the results from the binary exchange systems can be extrapolated to ternary (three ion) exchange systems using appropriate models. This, however, is rarely evaluated. T…