Materials Literature
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An elasticity solution is utilized to analyze an orthotropic fiber in an isotropic matrix under uniform thermal load. The analysis reveals that stress distributions in the fiber are singular in the radial coordinate when the radial fiber stiffness (Crr) is greater than the hoop stiffness (Cθθ). Conversely, if Crr <…
The effect of the nature of the oil phase of w/o/w emulsions stabilized by interfacial complexation between span 80 (sorbitan mono-oleate) and albumin has been studied. The long-term stability of the systems has been assessed by photomicrography and by measuring the quantity of an internal marker (NaCl) remaining entr…
High-resolution heat-capacity, tilt-angle, and polarization measurements have been carried out in the vicinity of the smectic-A (SmA) --chiral-smectic-C (Sm${C}^{\mathrm{*}}$) phase transition of p-(n-decyloxybenzylidene)-p-amino-(2-methylbutyl)cinnamate (DOBAMBC). Heat-capacity studies were done on two different samp…
A mechanical model for the lateral compression of woven fabrics is derived from Van Wyk's compression law for fiber assemblies. The pressure ( P) and thickness (v) relationship is P = a/( v - v')3. The parameter v' refers to the core of the fabric, which is incompressible over the pressure range 2-5000 gf/cm 2 . The p…
The energy and atomic structure of {1121}, {1122) and {1012} twin boundaries in the hexagonal-close-packed (h.c.p.) metals have been investigated using computer simulation. Three distinctly different interatomic potential functions have been used in either equilibrium or non-equilibrium form. It is predicted that only…
Albumin-(gadolinium-diethylenetriaminepentaacetic acid), albumin-(Gd-DTPA), a macromolecular MR contrast agent designed for intravascular distribution, was compared with gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA), an extracellular fluid agent, for imaging characteristics in normal rats at 2.0 T. Albumin-(…
"An Introduction to Nuclear Reactor Theory." Nuclear Technology, 75(3), p. 378
A computer-aided measurement system has enabled novel interpretation of partial discharge (PD) signals. We take into consideration voltage phase-angle at which each PD pulse takes place, and consequently need simultaneous measurement of the pulse height q and the phase angle ϕ. According to the analysis of PD pulse si…
A combination of two-atom and three-atom interactions has been selected to represent the structural chemistry of sulfur. This model potential exhibits divalency (bond saturation) and leads to the known preference for Sn molecules to form puckered ring structures. Using this representation of the interactions, molecula…
The problem of deriving an optimal set of thermodynamic properties of minerals from a diverse experimental data base is reviewed and a preferred methodology proposed. Mathematical pro-gramming(MAP) methods extend the linear programming (LIP) approach first presented by Gordon (1973), and make it possible to account fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical procedure for preparing surface-enhanced Raman scattering active silver filmsFan. Ni and Therese M. CottonCite this: Anal. Chem. 1986, 58, 14, 3159–3163Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 Decembe…
Abstract In the presence of oxygen and visible light, various synthetic water‐soluble porphyrins cleave pBR 322 plasmid supercoiled DNA (form I) producing relaxed (form II) and linear (form III) DNA corresponding to single‐strand and double‐strand breaks respectively. Large variations are observed in the efficiency of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganoiron electron-reservoir complexesDidier AstrucCite this: Acc. Chem. Res. 1986, 19, 12, 377–383Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://pubs.acs.org/doi/10.1021/ar00132a001https://doi…
Abstract Electron diffraction patterns of highly oriented poly( p ‐phenylene vinylene) films obtained by the soluble polymeric precursor route are interpreted on the basis of a monoclinic unit cell containing two monomer units: c (chain axis) = 0.658 nm, a = 0.790 nm, b = 0.605 nm, α ≃ 123°. The molecules are nearly p…
Using grazing incidence geometry and fluorescence detection, surface EXAFS of a monolayer of underpotentially deposited copper on epitaxially deposited gold (111) on mica was observed. Both Cu–Au and Cu–O scattering are observed. The results are interpreted in terms of models in which the Cu–O distance is 2.08±0.03 Å…
The relationship between material softening and structural softening is investigated through the use of a model problem in one dimension. If the size of the softening zone is large the structural softening response is stable under displacement-prescribed loading. For a small size, the softening response is unstable an…
Various diagnostic methods of GIS have been studied and some of them were applied in the field. In this paper the principles of methods such as mechanical, chemical, electrical detection, and others are described. As mechanical methods, a highly sensitive piezo-electric acceleration sensor and an ultrasonic-wave senso…
Abstract Pyrex-filtered photoirradiation with a high-pressure Hg lamp was performed for a thermally inert hydridocobalt(I) CoH[PPh(OEt)2]4 in the presence of some allylic compounds. Allyl benzoate and allyl phenyl ether showed the cleavage of allylic-O bonds to give propene in a stoichiometric quantity to the complex…
Abstract The NH 2 (X̃ 2 B 1 ) radical reactions with saturated hydrocarbons, toluene and acetaldehyde were investigated in an isothermal discharge flow system over the given temperature ranges. The pressure was varied between 2.6 and 7.8 mbar. Helium was used as the main carrier gas. The temperature dependences of the…
The average structure (CI) of a volcanic plagioclase megacryst with composition Ano, from the Hogarth Ranges, Australia, has been determined using three-dimensional, singlecrystal neutron and X-ray diffraction data. Least squaresr efinements, incorporating anisotropic thermal motion of all atoms and an extinction corr…