Materials Literature
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Results of studies are presented examining the effect of rotor speed, rotor diameter and tandem carding on properties of open-end (OE) yams. Most of the yam properties excepting strength show a significant deterioration with increase of rotor speed, in case of strength, no consistent trend was observed. Yarn elongatio…
The reversed-flow techniquc, uscd previously to measure gas diffusion cocfficicnts. hctcrogcncous catalysis of simple first-order reactions, and othcr processes, is now cxtcndcd to thc study of the kinetics of a morc conlplicatcd rcaction, nan~cly, the oxidation of carbon monoxide over solid catalysts containing Co304…
This report is concerned with the spinodal decomposition and magnetic properties of Fe–21∼30 Cr–12Co ternary alloys (by weight) as studied by transmission electron microscopy and magnetic measurements. Wavelength growth of the isothermally aged spinodal structure is found to be proportional to time1/3 for the later st…
In order to study the gelling mechanism of gelatin, the phase diagram for a diluted gelatin solution was investigated. Phase boundary curves were obtained by measuring the fluorescent depolarization, optical rotation, reduced viscosity, and light scattering of the gelatin solution. The phase diagram obtained exhibited…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectra of matrix-isolated metal complexes of octaethylporphineJames R. Kincaid, Marek W. Urban, Takeshi Watanabe, and Kazuo NakamotoCite this: J. Phys. Chem. 1983, 87, 16, 3096–3101Publication Date (Print):August 1, 1983Publication History Published online1 May 200…
Abstract not Available.
Abstract Two‐dimensional spherulite growth leads to the encirclement of regions of molten polymer in a polymer film. On further crystallization localized volume defects arise, resulting in thin spots in the film. Since this effect lowers the mechanical strength of films, we call these volume defects “weak spots.” A co…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Abstract A study was made of the ceric‐ammonium‐nitrate‐initiated graft polymerization of methyl methacrylate (MMA) onto a lineal fraction of starch (amylose). Grafting yields were determined by extraction with appropriate solvents: 1,2‐dichloroethane for homo‐PMM, and 0.5 N NaOH for ungrafted amylose. Percent graftin…
The refractive indices of LiF and MgF2 have been measured with an accuracy better than ±0.003 from 200 nm down to their respective cutoff wavelengths for various temperatures ranging from 80 to 300 K. For LiF, the temperature coefficient changes sign at 160 nm. The data were fitted to a two-term dispersion equation. T…
The nucleation of diopside and anorthite is always delayed under supercooled conditions. The delay in nucleation decreases with increasing degree of supercooling or increasing cooling rate. With further increase in the degree of supercooling or the cooling rate, the delay in anorthite nucleation increases. For a given…
The polypeptide chain of the allosteric L-lactate dehydrogenase (EC 1.1.1.27) of Lactobacillus casei consists of 325 amino acid residues. Despite the strikingly different enzymatic characteristics of the allosteric L-lactate dehydrogenase of L. casei and of the non-allosteric vertebrate enzymes, the sequence of the al…
Abstract As in the two‐dimensional case, the density change due to crystallization leads to a buildup of internal strain in some regions of a polymer melt occluded by growing spherulites. The occluded parts of the sample are called “weak spots.” Computer simulation of spherulite growth in bulk samples shows that the l…
Negatively stained sarcoplasmic reticulum from the scallop Placopecten magellanicus presented a variety of crystalline forms, the most common being tubular structures. These were characterized by paired rows of morphological units, spaced at approximately 120 A, running diagonally across the tubules. The orthogonal un…
The crystal structure of the title compound, [CO(C15H11N3)2](ClO4)2.c. 1.3H2O has been determined by single crystal X-ray diffraction methods at 295 K. The structure is described in terms of atetragonal P 42/ n sub-lattice structure similar to that of [Co(terpy)2]I2.2H2O, with a 8.86(1), c 20.19(2) Å. Perchlorate orie…
Abstract The condensation polymerizations of bis(4‐flurophenyl) sulfone with the bistrimethylsilyl derivates of bisphenol‐A, 4,4′‐dihydroxydiphenyl sulfone, 1,5′‐dihydroxynaphthalene, 3‐hydroxybenzoic acid, and 4‐hydroxybenzoic acid were investigated. These polycondensations were only successful when potassium or cesi…
Density measurements of aqueous solutions of ethanol, t-butanol, and hydrazine in the temperature range from 50 °C down to nucleation are presented. From these data, solute partial molar volumes and temperatures of maximum density are determined. The partial molar volumes of the alcohol solutions at low concentration…
Abstract FT‐IR spectroscopic studies have been performed in an attempt to elucidate the nature of the specific interactions occurring in miscible poly(ϵ‐caprolactone) (PCL)‐poly (vinyl chloride) (PVC) blends. Studies of low molecular weight analogues, polymer/solvent mixtures and blends of PCL and α‐deuterated PVC are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFire- and heat-resistant laminating resins based on maleimido-substituted aromatic cyclotriphosphazenesDevendra Kumar, George M. Fohlen, and John A. ParkerCite this: Macromolecules 1983, 16, 8, 1250–1257Publication Date (Print):August 1, 1983Publication History Published onl…
The aim of this work is the study of the order-disorder distribution of the Fe3+ cations in a dioctahedral smectite: the Garfield nontronite. The structural characteristics have been determined by selected-area electron diffraction, oblique texture electron diffraction and X-ray diffraction. These methods lead to the…