Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCross-coupling versus homocoupling in the reactions of dimethyl(N,N,N',N'-tetramethylethanediamine)palladium with organic halidesWim De Graaf, Jaap Boersma, and Gerard Van KotenCite this: Organometallics 1990, 9, 5, 1479–1484Publication Date (Print):May 1, 1990Publication Hi…
The plasma–material interaction and high heat flux properties of beryllium are reviewed to determine its suitability as a plasma‐facing component in magnetic fusion energy reactors. Consideration is given to beryllium’s outgassing, erosion, and hydrogen retention characteristics. Its responses to normal and off‐normal…
Abstract Polyacetal (POM) toughening with thermoplastic polyurethane (TPU) elastomer was investigated in terms of Theological, mechanical, and morphological properties. Polyacetal can be effectively toughened by the blending with TPU elastomer and the improvement on toughness is found most significant with TPU content…
Abstract The crystallization behavior of two ethylene/octene copolymers, which differ in hexyl branch concentration, and their fractions were assessed. Fractionation of the crystalline linear low density polyethylenes (LLDPEs) was achieved by temperature rising elution fractionation. As the column temperature was rais…
The transepithelial absorption of food-type proteins has been shown to proceed by endocytosis along two functional pathways: a minor direct pathway allowing transport of intact protein and a major lysosomal degradative pathway. The human colon carcinoma cell line CaCo-2 grown on Millipore filters was used here further…
A compound of formula CuCI2(NITpPy),, where NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethylimidazolinyIl--o xy1 3-oxide, was synthesized. It crystallizes in the triclinic Pi space group with a = 7.301 ( I ) A, b = 12.693 (2) A, c = 14.984 (2) A, a! = 79.79 (I)', 0 = 86.67 (I)', y = 83.92 (I)', and Z = 2. The structure cons…
Tritium handling equipment and methods at the Savannah River Site Tritium Facilities have been continually improved since tritium processing operations began in 1955. Several new technologies were introduced into the Tritium Facilities in the 1980’s. One of these is the use of fluidless, mechanical pumps (Normetex and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and redox chemistry of aquaferrotungstosilicate, H2OFeIIISiW11O395- in the presence of hydrogen peroxide and hydroxylJames E. Toth, Jon D. Melton, Diane Cabelli, Benon H. J. Bielski, and Fred C. AnsonCite this: Inorg. Chem. 1990, 29, 10, 1952–1957Publication…
In a recent paper McGreevy and Pusztai [1] have described an interesting simulation technique for determining the structure of disordered systems (liquids and glasses) that uses as input the experimentally measured radial distribution function g E(r 12), or equivalently, the structure factor a E(k). The essence of the…
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…