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Abstract Late Cretaceous to Quaternary terrestrial sediments derived from fault scarps and actively growing folds in schist and greywacke basement are locally preserved in Otago and South Canterbury, New Zealand. Sediments are immature, sparsely carbonaceous, and generally poorly sorted and have undergone little oxida…
Redox chemistries of cobalt(II) and iron(II) phthalocyanines, as well as interactions of the reduced phthalocyanines with oxygen, have been studied using spectroelectrochemical and other transient electrochemical techniques in nonaqueous solutions including pyridine, dimethylsulfoxide, and dichloromethane. Results ind…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyelectrolyte Monolayers at the Mica/Air Interface: Mechanically Induced Rearrangements and Monolayer AnnealingK. Lowack and C. A. HelmCite this: Macromolecules 1995, 28, 8, 2912–2921Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Publis…
The microstructure of the shell of the abalone Haliotis fulgens consists of alternate layers of aragonite and prismatic calcium with darker organic matrix (conchiolin) that are visible as rings when the shell is ground down at the spire. This abalone deposits about four prismatic layers in the first year and three lay…
Abstract Cocrystallization and phase segregation phenomena of polyethylene (PE) blends between fully deuterated high‐density PE (DHDPE) and hydrogeneous PE with various degrees of ethyl branching have been investigated on the basis of DSC, FTIR, synchrotron X‐ray scattering, and neutron scattering measurements. When t…
A series of thermoplastic polyurethanes was synthesized with varying hard segment composition or content and the effect of the hard segments on morphology and properties was studied by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermal mechanical analysis (TMA), Fourier transform infra…
For the first time an attempt has been made to determine the lattice parameter, density, and molar mass of an isotopically highly enriched silicon-28 crystal. The goal was to achieve an independent value of Avogadro's constant of accuracy equal or superior to current best values obtained from similar measurements of v…
The octahedron is the growth form expected for a face-centered cubic crystal, and indeed, some diamonds are octahedra; however, most natural diamonds have morphologies that are intermediate between octahedra {111}, dodecahedra {110}, and, more rarely, cubes {100} or twins and aggregates on which elements of these form…
Interactions between poly(styrenesu1fonate) (PSS) and poly(acry1ic acid) (PA) in aqueous solution have been studied, with and without added salt, and at various degrees of neutralization (a) of PA. Equilibrium phase diagrams have been determined, and the viscosities of monophasic mixtures have been measured. Both type…
The effect of carbon content on the resistance to localized corrosion of ASTM-F75, as-cast cobalt-based alloys, was studied using potentiostatic polarization tests in Ringer's solution. Critical pitting potentials were estimated from the potentiostatic polarization curves and were found to increase with decreasing car…
We discuss a number of practical implications from recent studies on HVDC design concepts for vacuum components. These studies dealt with microwave tube technology. The conclusions, however, are valid for a wide range of components. The goal of this work is to provide a scientific basis for the design of HVDC vacuum c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Diagram of Hydration Shells in Ionic SolutionsI. Danielewicz-FerchminCite this: J. Phys. Chem. 1995, 99, 15, 5658–5665Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/j100…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Functional Modeling Study of the CO Oxidation Site of Nickel CO DehydrogenaseZheng Lu and Robert H. CrabtreeCite this: J. Am. Chem. Soc. 1995, 117, 14, 3994–3998Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 19…
For lack of alternatives, echelle-grating diffraction behavior has in the past been modeled on scalar theory, despite observations that indicate significant deviations. To resolve this difficulty a detailed experimental, theoretical, and numerical study is performed for several echelles that work at low (18-13), mediu…
Molecular dynamics simulation results are used to demonstrate the existence of a growing length in supercooled, fragile glass-forming liquids. This length is the longest wavelength, propagating shear wave the fluid can support. Explicit results are reported for an equimolar soft-sphere mixture. A possible connection b…
A homologous series of liquid crystalline cis, cis-(3,5-dihydroxycyclohexyl) 3,4-bis(alkoxy)-benzoates ('two chain' diols) is described. The formation of different mesophase structures by these compounds is influenced by the length of the alkoxy side chains; changes from smectic via cubic to hexagonal columnar mesopha…
Abstract Microcellular polycarbonate is a novel cellular material with cells on the order of 10 μm in diameter and a cell density on the order of 10 9 cells per cm 3 . In this study the room temperature creep response of microcellular polycarbonate is experimentally determined and compared with the creep behavior of p…
In the re-investigation by neutron powder diffraction of 3 mol% yttria–tetragonal zirconia polycrystal (Y-TZP), it was realized that the sample, initially taken to be single-phase tetragonal zirconia, was in fact a two-phase mixture of the tetragonal (80%) and cubic (20%) polymorphs. Two-phase refinement gave for the…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Victor Arrizón and E. López-Olazagasti, "Binary phase grating for array generation at 1/16 of Talbot length," J. Opt. Soc. Am. A 12, 801-804 (1995) Exp…
Abstract The pyrolytic processes of polycarbosilane (PCS) to silicon carbide and of polycarbosilazane (PCSZ) to silicon carbonitride were studied by gas analysis, electron spin resonance (ESR), and X-ray diffraction. On the progress of conversion from organic polymers to ceramics above 800 K, decomposition gases like…