Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical studies of cobalt-carbon bond formation. A kinetic investigation of the reaction between (tetraphenylporphinato)cobalt(I) and alkyl halidesG. B. Maiya, B. C. Han, and Karl M. KadishCite this: Langmuir 1989, 5, 3, 645–650Publication Date (Print):May 1, 1989Pub…
Two neighbouring grains of the same phase with a lattice of hexagonal Bravais type are considered which have a three-dimensional lattice of symmetry translations in common, called the coincidence site lattice or CSL. The volume ratio of unit cells for the CSL and the original lattice is called the multiplicity Σ. The…
The photostabilization of nifedipine by using film coating has been investigated in model systems in which a drug sample, dispersed on a glass plate, was covered with a free film and exposed to intensive light of mercury vapour lamp. The light transmission properties of films containing titanium dioxide or tartrazine…
Abstract Poly(vinyl chloride), PVC, is shown to be miscible with an α‐methyl styrene/acrylonitrile copolymer, αMSAN, containing 30 percent AN by weight using differential scanning calorimetry for blends prepared by several methods. Melt blending gave single T g mixtures; whereas, solution techniques gave results that…
The ability of zero-stress simulations, using Gordon-Kim pair potentials, to describe the structures and transformations of known fluoride-based perovskites is demonstrated for the case of ${\mathrm{KCaF}}_{3}$. When ${\mathrm{K}}^{+}$ is replaced by ${\mathrm{Na}}^{+}$ a new ferroelectric crystal isomorphous with ${\…
Summary A model heat-exchange apparatus was used to investigate the factors affecting deposit formation from milk on a stainless steel surface at 100 °C. The structure and composition of the deposits were determined by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and chemical analysis after solu…
We have studied the surface chemistry of iron pentacarbonyl by using thermal programmed desorption and x-ray photoelectron spectroscopy (XPS). Thermal desorption is mostly molecular and takes place in two stages. At low coverages a peak at 195 K was detected. For exposures above 4 L a second peak due to multilayer gro…
The stability of beta alumina in fully developed Zebra Na / FeCl 2 cells under long‐term cycling has been proven. In the early stages of development of the Na / FeCl 2 cell, some problems in the form of increased resistances were encountered under certain extreme conditions of temperature and voltage. While these diff…
Alkyl-substituted azobenzene-4-carboxylic acids are potent differentiation inducers of human promyelocytic leukemia cell line HL-60 to mature granulocytes. Their structure-activity relationships are very similar to those of other retinoidal benzoic acids which are generally represented by 4 and named retinobenzoic aci…
We present a new real-space renormalization-group (RSRG) scheme for finding exactly the local Green's functions (LGF) for electrons in a quasiperiodic Fibonacci chain. It has been possible to construct the RSRG transformation, which, apart from renormalizing the Fibonacci chain globally, also preserves the local envir…
New structural and calorimetric data for samples of NiAl 2 O 4 quenched from 600° to 1560°C are presented The spinel remains stoichiometric for all heat treatments. Based on the refinement of X‐ray powder patterns, it is shown that the degree of disorder, defined as the mole fraction of tetrahedral sites occupied by A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-temperature investigation of the ferrimagnetic chains MnM' (EDTA).cntdot.6H2O [M' = cobalt, nickel, and copper(II)]: thermal and magnetic propertiesE. Coronado, M. Drillon, P. R. Nugteren, L. J. De Jongh, D. Beltran, and R. GeorgesCite this: J. Am. Chem. Soc. 1989, 111,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSequence distribution in poly(dimethylsiloxane-co-methylvinylsiloxanes)Maris J. Ziemelis and John C. SaamCite this: Macromolecules 1989, 22, 5, 2111–2116Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs…
Abstract The effect of physical aging on viscoelastic properties was studied for several cross‐linked epoxies in the glassy state. Tensile creep and tensile stress relaxation were measured during isothermal physical aging, following rapid quenching of samples annealed above the glass‐transition temperature ( T g ). Th…
Abstract In cast film extrusion, the polymer melt is extruded through a slit die, slightly stretched in air and then cooled on a chill-roll. An important part of the present work was devoted to the development and application of a thermomechanical model of stretching in air and of a purely thermal model of cooling on…
Abstract α,ω‐Dihydroxy‐terminated‐PMMA was synthesized by the bulk polymerization of methyl methacrylate in the presence of a functional “iniferter,” viz., N , N ′‐diethyl‐ N , N ′‐bis(2‐hydroxyethyl)thiuram disulfide (DHTD). The kinetics of the polymerization were studied by determining the polymerization rate as a f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDonor-acceptor properties of ambient-temperature chloroaluminate meltsThomas A. Zawodzinski Jr. and Robert A. OsteryoungCite this: Inorg. Chem. 1989, 28, 9, 1710–1715Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 198…
The purpose of this study was to relate changes in collagen composition with the mechanical properties of aortas of spontaneously hypertensive rats (SHRs). SHRs and normal Wistar-Kyoto (WKY) rats were killed at ages 6 and 20 weeks, and their aortas were removed. A portion of each aorta was used for determination of pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterobimetallic gold-palladium phosphine cluster complexes. X-ray crystal and molecular structure of [Au8Pd(PPh3)8](NO3)2Larry N. Ito, Brian J. Johnson, Ann M. Mueting, and Louis H. PignoletCite this: Inorg. Chem. 1989, 28, 11, 2026–2028Publication Date (Print):May 1, 1989P…
Aluminum anodization has been studied in the basic ambient temperature molten salt . The anodization process was studied as a function of chloride anion concentration. Two different anodization processes are observed with onset potentials of approximately −1.1 and 0 V. The more cathodic anodization involves formation…