Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIonic Clusters in High-Strength Carboxylic RubbersA. V. Tobolsky, P. F. Lyons, and N. HataCite this: Macromolecules 1968, 1, 6, 515–519Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.org…
Abstract Die Darstellung, Analyse und einige physikalische Eigenschaften der Phasen “Sn 4 As 3 ” und “Sn 4 P 3 ” werden beschrieben. Die bereits bekannte Kristallstruktur wird bestätigt und verfeinert (s. Tab. 1).
Abstract The influence of various thermal pretreatments on the nucleation of isotactic polystyrene has been studied quantitatively by dilatometry. A distinction can be made between nuclei still present above the melting point (“resistant” nuclei) and nuclei created by severe supercooling (“induced” nuclei). The number…
Thin foils of U4O9 prepared from bulk single crystals of UO2 were investigated at 20 °C and between 300 °C and 1000 °C in the electron microscope. At 20 °C the complete reciprocal lattice of U4O9 has been established. Between about 550° and 700°C an order-partial disorder transformation has been found in most of the s…
Optometry and Vision Science is the most authoritative source for current developments in optometry, physiological optics, and vision science. This frequently cited monthly scientific journal has served primary eye care practitioners for more than 75 years, promoting vital interdisciplinary exchange among optometrists…
Reactively sputtered vanadium dioxide films have been analyzed to determine the relation between their electrical and structural properties. The structure of the thin films was determined by x-ray diffraction, reflection electron diffraction, and electron microscopy of carbon replicas of the film surfaces. The various…
Raman spectra, with polarizations, are presented for CER–VIT, fused silica, ULE glass, and a Corning heat-absorbing glass. The spectra of the three amorphous glasses are quite similar. The spectra of these glasses indicate a small scattering unit of low symmetry, perhaps a distorted SiO4 tetrahedron. The spectrum of C…
Abstract Montmorillonite, identified by X‐ray diffraction, is the predominant clay mineral in the B horizons of four widely separated California soils (Henneke, Dubakella, and Fancher series and one from the New Idria area) derived from serpentinite. The < 0.2µ fractions contain respectively, 81, 68, 71, and 33% mo…
Abstract Die tert.‐Butylate (CH 3 ) 3 COM (M K, Rb, Cs) kristallisieren nach röntgenographischen Untersuchungen der Kristallpulver kubisch‐primitiv mit den Gitterkonstanten a = 8.47 5 Å (K), 8.61 0 Å (Rb) und 8.90 2 Å (Cs) und vier Formeleinheiten je Elementarzelle. Sie bilden tetramere Struktureinheiten dadurch, da…
According to Tsutsumi the X-ray non-diagram line K β' and the asymmetry of the K α line are derived from the exchange interaction between the electrons of the incomplete 3 d shell and those of the incomplete inner shell owing to the emission of the X-rays. Then the variations with valences are expected in the energy d…
A single beam spectrophotometer has been developed for the measurement of spectral attenuation coefficients of very low loss optical glasses in the wavelength range 400-1000 nm. The instrument has an accuracy to ±0·00005 cm −1 when sample thicknesses of 20 cm are used. The basic stability of the instrument and the sou…
Vapor deposition was used to obtain homogeneous glass films of several BaO‐SiO 2 compositions in the region of the metastable miscibility gap. The films were electron‐beam heated in the electron microscope, and the phase separation process was observed. At low BaO contents, separation was characterized by the appearan…
The martensite transformation which occurs either thermally or by plastic deformation in the equi-atomic Ni-Ti alloy has been studied in detail by transmission electron microscopy. The transformation occurs by alternate simple shears on {112} planes and in ⟨111⟩ directions of the parent B2 structure. These shears conv…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrin studies. XXXVII. The interpretation of porphyrin and metalloporphyrin spectraAlsoph H. Corwin, Arthur B. Chivvis, Robert W. Poor, David G. Whitten, and Earl Wayne BakerCite this: J. Am. Chem. Soc. 1968, 90, 24, 6577–6583Publication Date (Print):November 1, 1968Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal chemistry of the rare earth sesquisulfidesArthur W. Sleight and Charles T. PrewittCite this: Inorg. Chem. 1968, 7, 11, 2282–2288Publication Date (Print):November 1, 1968Publication History Published online1 May 2002Published inissue 1 November 1968https://pubs.acs.or…
Oliver E Nelson; THE WAXY LOCUS IN MAIZE. II. THE LOCATION OF THE CONTROLLING ELEMENT ALLELES, Genetics, Volume 60, Issue 3, 1 November 1968, Pages 507–524, htt
Abstract A leucine-binding protein isolated from Escherichia coli K12 has been purified by DEAE-cellulose and hydroxylapatite cellulose chromatography and its chemical and physical properties were determined. The purified protein was crystallized by adding 2-methyl-2,4-pentanediol. The crystalline protein was homogene…
Mixtures of PbO and silicic acid were fired at 710°, 820°, and 910°C for periods up to 1000 hr in air. At each temperature cristobalite and tridymite crystallized rapidly, with the greatest development in samples with compositions of 1 mole PbO to 50 and 60 moles SO 2 . At 820° and 91O°C tridymite continued to crystal…
Abstract The problem of preventing calcium sulfate scale deposition has become increasingly important in the last few years due to the increasing use of waterflood as a means of secondary recovery. Many methods have been proposed for removing or preventing scale deposition. A few chemicals and treatment methods have b…
Electron diffraction contrast experiments have been performed to crystallographically characterize the dislocation loops which form during 1100°C annealing of neutron-irradiated tungsten. These experiments show that the loops are essentially pure edge in orientation, lying on or near {111} habit planes and having a/2⟨…