Materials Literature
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The set of optical constants of germanium reported by Marton and Toots, from 8 to 25 eV, have been assessed and found to be internally consistent to within ±5%. An extension of the n and k values up to photon energy of 100 eV using Hunter's k values also has been studied. The analysis consisted of an internal consiste…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of bivalent sulfur compounds-copper(II) complexesTeruaki Mukaiyama, Koichi Narasaka, and Hisao HokonokiCite this: J. Am. Chem. Soc. 1969, 91, 15, 4315–4317Publication Date (Print):July 1, 1969Publication History Published online1 May 2002Published inissue 1 July 19…
Abstract Physical characteristics of rubber network structures usually enumerated and discussed are network chain density, crosslink functionality, average chain length between crosslinks, entanglements which act somewhat like crosslinks, and free chain ends which are network defects. Chemical factors include structur…
Ac and dc conductivity, tunneling, and optical transmission and reflectance studies have been made on amorphous and crystalline (rhombohedral and NaCl) GeTe films (80 Å to 10 μ thick) prepared by evaporation and by sputtering. The crystalline films behave like a p-type degenerate semiconductor with Fermi level ∼0.3–0.…
Abstract Neu dargestellt wurde Na 3 CuO 3 durch Erhitzen von Na 2 O 2 /CuO‐Mischungen auf 630°C unter O 2 . Nach Einkristalluntersuchungen kristallisiert Na 3 CuO 3 triklin: a = 18,25 5 ; b = 16,78 5 ; c = 11,12 9 Å; α = 136,2; β = 106,9; γ = 90,6°; Z = 36.
Abstract The effect of sulfur, MBT, zinc oxide and stearic acid, either singly or in mixtures, on the DCP vulcanization of NR has been studied. In all cases DCP decomposes by a first order law, but the rate constant is higher in presence of MBT. Sulfur and MBT, separately or together reduce the crosslink density, each…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. P. Chauvineau, P. Croce, G. Devant, M. F. Verhaeghe; Recrystallization of Thin Gold Films: Inf…
Abstract The kinetics of the phase transformation of anatase to rutile was studied by means of X-ray diffraction. Samples of anatase were prepared by sulfate and chloride processes. The kinetic data could well be expressed by the equation α=1−e−btn, where α is the fraction of anatase transformed in time t, and b and n…
In electron microscopy, and particularly in small-angle electron diffraction, the electric charging of thin insulating films, which are frequently used to support specimens, has been regarded as a nuisance and techniques have been developed to minimize it. One particular phenomenon, however, has been of scientific int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConductance, viscosity, density, proton magnetic resonance spectra, and glass transition temperatures of calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate melts. An ideal fused salt systemCornelius T. Moynihan, C. R. Smalley, C. A. Angell, and E. J. SareCite this: J.…
The electrochemical and corrosion characteristics of Types 383, 304, and 316 stainless steel in 1N¯ H2SO4 were determined using precision potentiostatic polarization and conventional coupon exposure/weight change techniques. Factors increasing the magnitude of the critical anodic current density, Ic, are shown to have…
The thermal coefficients of refractive index have been determined for 23 commercial glasses. The interferometric procedure consisted of determining both the change of optical path of each glass with a change of temperature at a given wavelength and set coefficient of linear thermal expansion of the glass for the same…
The thermal behavior of pyrite in air was studied. A one‐step mechanism for the oxidation of pyrite to hematite exists and accounts for previously reported weight‐loss, DTA, and gas train data which implied a two‐step mechanism. Proper control of the oxidation temperature is very important in completing the pyrite oxi…
Abstract Two protein fractions, designated E1 and E3, which are required for the TPNH-dependent reduction of cytidine diphosphate 4-keto-6-deoxy-d-glucose to an intermediate (presumed to be CDP-4-keto-3,6-dideoxy-d-glucose) have been partially purified from extracts of Pasteurella pseudotuberculosis 25 VO and Salmonel…
In a brief introductory section the derivation of the Shubnikov groups and their importance in the description of the symmetries of magnetic crystals is described. The derivation of the black and white Bravais lattices and of the Shubnikov point groups and space groups is described and there is a brief discussion of s…
The arrangement of the sulfur helices in the pressure-induced fibrous form of sulfur has been determined from three-dimensional x-ray diffractometer data. The crystals show orthorhombic diffraction symmetry, but analysis of their structure has shown that the most probable space group is P2 and that the orthorhombic sy…
A stereographic technique has been developed for the accurate determination of the dimensions of features on scanning electron micrographs. More general methods than those used previously are shown to be necessary largely because of the wide range of operating angles available in the scanning electron microscope. An e…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Goro Honjo, Katsumichi Yagi; Studies of Epitaxial Growth of Metallic and Nonmetallic Films by Mea…
The ampullate silk gland of the spider, Araneus sericatus, produces the silk fiber for the scaffolding of the web. The fine structure of the various parts of the gland is described. The distal portion of the duct consist of a tube of epithelial cells which appear to secrete a substance which forms the tunica intima of…
The fibrous aluminosilicate imogolite has been studied by electronoptical and infrared absorption methods. Electron diffraction patterns are interpreted in terms of repeat units of 8·4 Å parallel and 23 Å perpendicular to the fibre axis. These spacings can not be reconciled with a continuous silicate chain structure a…