The Oxidation of UC and UN Powder in Air
(1968). The Oxidation of UC and UN Powder in Air. Journal of Nuclear Science and Technology: Vol. 5, No. 11, pp. 600-602.
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39—THE DETERMINATION OF THE LATERAL-COMPRESSION MODULUS OF FIBRES
An account is given of the measurement of the transverse deformation of fibres under various loads acting normal to the fibre longitudinal axis by a technique in which fibres are interleaved between glass plates in a vertical stack. Graphs of transverse load against compression are plotted for nylon, acrylic, and visc…
Thickness Estimation of Carbon Films by Electron Microscopy of Transverse Sections and Optical Density Measurements
A rapid and convenient method is described for the accurate determination of the thickness of carbon films from their optical density. A linear relationship was found between optical density and film thickness. The optical-density-thickness curve was calibrated by direct measurement of the thickness of transverse sect…
Structure and properties of cellulose graft copolymers. II. Cellulose–styrene graft copolymers synthesized by the ceric ion method
Abstract Styrene was graft‐copolymerized onto wood cellulose by the ceric ion method of Mino and Kaizerman. The grafting reaction was found to depend strongly on the concentration of ceric ion in the grafting system and maximum grafting occurred in a narrow range of concentration of initiator, 1.0 × 10 −3 ‐1.8 × 10 −3…
Studies in Germanium Oxide Systems: IV, Phase Equilibria in the System K,O‐GeO,
Phase relations in the binary system K 2 O‐GeO 2 were determined by conventional quenching techniques. Three compounds, K 2 O.2GeO 2 , 3K 2 O.11GeO 2 , and K 2 O.7GeO 2 , exist in the composition range 65 to 100% GeOn. The compound 3K 2 O.1lGeO 2 melts congruently at 1055°C, whereas K 2 O.2GeO 2 and K 2 O.7GeO 2 melt…
The Mechanical Properties of Woven Fabrics
Deformation mechanism of the elastic region which follows the nonlinear frictional region in shearing of plain-weave fabrics is analyzed, and the elastic shear modulus is determined in terms of the mechanical properties of the yarn and the geometrical parameters of the fabric. The mechanical behavior of the three-dime…
The Luminosity Curve of the Protanomalous Fovea
Threshold spectral sensitivities (in the dark, or against bright colored backgrounds) are identical in the red-green range for both protanopes (dichromats) and protanomalous trichromatic color defectives. The latter, however, must have an additional photolabile cone pigment in the red-green range, and its presence is…
Three-Dimensional Orientation Distribution Function of Crystals in Cold-Rolled Copper
The three-dimensional orientation distribution function of crystallites in cold-rolled copper sheets has been calculated from 512 individual selected area electron-diffraction orientation determinations as well as from (111), (200), and (220) pole figures which were determined by x-ray diffraction. In both cases tube-…
Ionic Clusters in High-Strength Carboxylic Rubbers
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…
Darstellung und Kristallstruktur der Phasen „Sn4P3” und „Sn4As3”
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).
Crystallization kinetics of isotactic polystyrene. II. Influence of thermal history on number of nuclei
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…
Electron diffraction of U4O9
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…
THIN FILMS IN OPTICS
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…
Structural and Electrical Properties of Vanadium Dioxide Thin Films
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 of Some Low-Expansion Glasses
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…
Iron‐Rich Montmorillonite Formation in Soils Derived from Serpentinite
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…
Röntgenographische, NMR‐ und massenspektrometrische Untersuchungen der tert.‐Butylate des Kaliums, Rubidiums und Cäsiums
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…
X-Ray K Emission Spectra of Chromium in Various Chromium Compounds
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…
Spectrophotometric studies of ultra low loss optical glasses I: single beam method
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…
Development of Two‐Phase Structure in Glasses, with Special Reference to the System BaO‐SiO 2
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…