Materials Literature
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Abstract— Carotenoid pigments were extracted and purified from wild‐type and mutants 7 and 93a of Sarcina lutea , and tested for their ability to quench 1 O 2 . The wild‐type pigment (P‐438, 9 conjugated double bonds) is as active in quenching 1 O 2 as is β‐carotene. On the other hand, the pigment P‐422 (8 conjugated…
Abstract By X‐ray diffraction and by density measurements as well as by differential scanning calorimetry, the crystallization phenomena of 6‐polyamide(nylon‐6) samples, obtained under different conditions were investigated. Particularly we have analyzed a method for the quantitative determination of the α, γ, and δ (…
Because of the resistance of iron-chromium stainless steels to chloride stress corrosion, this alloy system was used as a base for developing superior resistance to various forms of corrosion by means of alloying with molybdenum, nickel, and the six metals of the platinum group. The effects of these alloying elements…
A method to study the diffraction of an electromagnetic plane wave by a grating,in the case where it has a finite conductivity, is described for both classical cases of polarization. The results relative to the visible and ultra-violet regions are compared to those recently obtained using an integral formalism [1],[2]…
Measurements of the miscibility gaps in the Li 2 O‐ and Na 2 O‐SiO 2 binaries are reported and compared to data of other workers. Heat treatments by brief immersion in liquid Sn were used for measuring the properties of glasses with a strong devitrification tendency. The miscibility‐gap boundaries of both systems are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of dithiolene complexes with amines. I. Adducts of iron and cobalt complexesIan G. Dance and Thomas R. MillerCite this: Inorg. Chem. 1974, 13, 3, 525–535Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 19…
The crystal structure of the title compound, obtained as a coating from a lime kiln, has been shown to be isostructural with that of the mineral silicocarnotite and refined by full-matrix least-squares methods (570 independent diffractometer reflections). The lattice parameters of the latter compound were used to init…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of the 10.pi. electron cyclooctatetraene dianion in potassium diglyme 1,3,5,7-tetramethylcyclooctatetraene dianion, [K((CH3OCH2CH2)2O)]2[C8H4(CH3)4]Stephen Z. Goldberg, Kenneth N. Raymond, C. A. Harmon, and David H. TempletonCite this: J. Am. Chem. Soc. 1974, 96, 5…
An experimental study was carried out to investigate the viscoelastic behavior of calcium carbonate-filled polypropylene melts, using the Han slit rheometer. In the analysis of the experimental data, the pressure gradient was used to determine the wall shear stress, and the exit pressure to determine the elasticity of…
Samples of low-density polyethylene, free from additives, were heated at temperatures between 284° and 355°C under high-purity nitrogen. Changes in molecular weight distribution (MWD), molecular weight averages, and degree of long-chain branching (LCB) were followed by gel chromatography (GPC) and viscosity measuremen…
The extinction-correction formalisms derived in a previous article have been applied to two sets of diffraction data on spherical crystals. Application to the neutron data on SrF2, collected by Cooper & Rouse at three different wavelengths, shows that the theory gives a slightly better fit than a special empirical for…
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Preface 1. Interfacial free energy and the y-ploy 2. The experimental determination of the solid-liquid interfacial free energy ySL 3. The structure of the solid-liquid interface 4. Non-structural views of the solid-liquid interface 5. Morphological stability 6. Dendritic growth 7. Eutectic growth 8. Mechanisms and ki…