Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and bonding of mononuclear aryloxide derivatives of niobium in oxidation states +5, +3, +2, and +1Timothy W. Coffindaffer, Bryan D. Steffy, Ian P. Rothwell, Kirsten Folting, John C. Huffman, and William E. StreibCite this: J. Am. Chem. Soc. 1989, 111, 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreresonance Raman studies of metal-to-ligand charge transfer in (NH3)4Ru(2,2'-bipyridine)2+. In situ bond length changes, force constants, and reorganization energiesStephen K. Doorn and Joseph T. HuppCite this: J. Am. Chem. Soc. 1989, 111, 13, 4704–4712Publication Date (Pr…
The discovery of ferroelectric liquid crystals (1974) together with the subsequent discovery of the surface-stabilized liquid crystals (1980) have enriched the family of ferroelectrics with a new, different and powerful member. At the same time it has considerably raised the performance level of liquid crystals as gen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation in polymer-ion solutions. 2. Polyelectrolyte effectsE. Pezron, Ludwik Leibler, and F. LafumaCite this: Macromolecules 1989, 22, 6, 2656–2662Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https…
SUMMARY The immiscible liquid displacement method was used to displace soil solutions from a variety of Oxfordshire soils. These included grassland, arable, and woodland soils. The results of detailed chemical analyses demonstrated that for most solutes there were significant seasonal differences as well as difference…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTActive site model of urease: synthesis, structure, and magnetic properties of a binuclear nickel(II) complex containing a polyimidazole ligandRobert M. Buchanan, Mark S. Mashuta, Kenneth J. Oberhausen, John F. Richardson, Qiaoying Li, and David N. HendricksonCite this: J. Am…
Transformation zone shape, size, and crack‐growth‐resistance ( R ‐curve) behavior were studied in precracked and annealed single‐edge notch bend specimens of commercial‐grade ceriapartially‐stabilized zirconia polycrystals as a function of applied load. Well‐defined transformation zones with a characteristic elongated…
Many studies of calcium phosphate precipitation have been made using relaxation techniques in which the concentrations of the lattice ions are allowed to decrease as equilibrium is approached. Since the nature of the phases that form depend markedly on the solution composition, this decrease can lead to concomitant ph…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDioxygen insertion into iron(III)-carbon bonds. NMR studies of the formation and reactivity of alkylperoxo complexes of iron(III) porphyrinsRamesh D. Arasasingham, Alan L. Balch, Charles R. Cornman, and Lechoslaw Latos-GrazynskiCite this: J. Am. Chem. Soc. 1989, 111, 12, 435…
Abstract The important connection between particulate deposit properties and deposition mechanism remains poorly understood and only scarcely studied. Accordingly, in this research, we develop a discrete stochastic model to simulate particulate deposition processes resulting from realistic combinations of deposition m…
Quantitative study of the capillary density of normal dermis of 113 biopsy specimens taken from 20 body sites from 6 cadavers was carried out. Histologic quantification of dermal capillaries using the alkaline phosphatase method to delineate vascular endothelium and automated image analysis demonstrates statistically…
The crystal structures of vanadinite tpb5(VO)3Cll and pyromorphite [Pbs@Od3Cl] have been refined to R : 0.022,0.021, respectively, using three-dimensional X-ray data. The atomic arrangement of pyromorphite is con_ firmed as an apatite isostructure. In the structures the pb polyhedra show little response to the tetrahe…
Abstract The validity of the saddle/001 method for estimating the percentage of smectite layers in randomly interstratified illite/smectite (I/S) minerals as a routine laboratory technique has been examined with respect to the effects of the crystallite size distribution (N = number of layers) of I/S and the degree of…
Abstract Measurements are described of characteristic stress‐strain properties in tension for several representative partially crystalline polymers prepared by cooling from the melt. Striking differences were found in the natural draw ratio, ranging from 2x to 11x. They are interpreted in terms of a simple molecular m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of monomers containing functional silyl groups. 7. Porous membranes with controlled microstructuresJae Suk Lee, Akira Hirao, and Seiichi NakahamaCite this: Macromolecules 1989, 22, 6, 2602–2606Publication Date (Print):June 1, 1989Publication History Published…
We tried to control immunolabeling conditions so that information about antigen concentration could be achieved by quantifying labeling patterns. Working with immunogold labeling procedures in ultrathin cryosections, we observed that differential penetration of immunoreagents causes considerable differences in labelin…
The electrochemical behavior of copper in 0.5 M deaerated sulfuric acid in the absence and presence of benzotriazole (BTAH) and ferric ions has been investigated with rotating disk electrodes. The BTAH inhibitive effect initiates at concentrations as low as 10−7 M. The mechanism of Cu/Cu(II) reaction is the same in th…
Static fatigue of dental ceramics results from the interaction of residual tensile stress and an aqueous environment. This phenomenon is a potential cause of delayed crack formation and propagation in ceramic or metal-ceramic restorations. For dental ceramics, the influence of microstructural defects such as porosity…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe use of very crowded silylamide ligands -N(SiMenPh3-n)2(n = 0, 1, or 2) to synthesize crystalline, two-coordinate, derivatives to manganese(II), iron(II), and cobalt(II) and the free ion [Ph3SiNSiPh3]-Hong Chen, Ruth A. Bartlett, H. V. Rasika Dias, Marilyn M. Olmstead, an…
Possible modulated structures of icosahedral quasicrystals are investigated. The modulated phases are regarded as lower symmetric phases where the global icosahedral symmetry of quasicrystals is broken due to mode locking of phason degrees of freedom. With the help of group theory, nonvanishing phason fields are calcu…