Materials Literature
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The thermal conductivities of five samples of commercial glasses and glass ceramics were measured at liquid helium temperatures. It was found that the conductivity data could be accounted for by an intrinsic structure scattering of phonons as proposed by Klemens combined with an internal boundary scattering. The intri…
Transient and steady-state measurements of space-charge-limited hole photocurrents in iodine generated at one electrode are presented. The hole drift mobility perpendicular to the $\mathrm{ac}$ crystallographic plane is 0.7 ${\mathrm{cm}}^{2}$/v sec and varies with temperature approximately at ${T}^{\ensuremath{-}1.2}…
The present work is concerned with the emission of optical radiation from foils irradiated with charged particles. A generalization of the Ginsburg-Frank treatment is presented in which the wave properties of normally incident charged particles are accounted for in the Born approximation. The foil is assumed to be of…
The proton resonance signal of water in partially dried tendon shows three peaks for samples equilibrated in an atmosphere of 30%—80% relative humidity (R.H.). The outer-peak splitting (between 0.5 and 1 gauss) has the character of a proton-pair splitting with effective interactions in, or close to, the fiber directio…
The problem of transient space-charge-limited currents in insulating and conducting crystals is treated mathematically. With a number of simplifying assumptions, solutions are derived for the time-dependent current and space-charge distribution following the onset of injection, the latter taking place via an ohmic con…
Minoru Kinoshita, Hideo Akamatu; The Electron Spin Resonance Absorption of the Complexes of Aromatic Sulfur Compounds with Lewis Acids, Bulletin of the Che
Data on the effect of calcination temperature on surface area, apparent crystallite size, compactibility, sintered density, and volume shrinkage are presented for thoria prepared from the oxy‐carbonate, chloride, nitrate, and oxalate. Surface area and volume shrinkage decreased with rising calcination temperature. Tho…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Substituted Glycolurils and Their N-Chlorinated DerivativesFrank B. Slezak, Henry Bluestone, Thomas A. Magee, and John H. WotizCite this: J. Org. Chem. 1962, 27, 6, 2181–2183Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Pub…
The atomic scattering factors of manganese and oxygen atoms in manganous oxide (MnO) were determined by measuring the integrated x-ray intensities of reflections from powder sample at room temperature. The intensities measured on a relative scale for five differently colored samples within an experimental error of ±0.…
Equipment on which six fiber specimens can be simultaneously fatigued in cyclic tension, at one common strain amplitude, has been developed and constructed. Fre quencies are continuously variable from zero to 18 cycles/sec, and the total stroke is adjustable from zero to 1 in. Provisions are made for the automatic tak…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Dipole Moment and Structure of ThiolactamsCalvin M. Lee and W. D. KumlerCite this: J. Org. Chem. 1962, 27, 6, 2052–2054Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/jo01053…
Thermokraft, elektrische Leitfähigkeit und HALL-Effekt unterschiedlich dotierter n- und p-leiten-der LaCoO 3 -Proben wurden über einen größeren Temperaturbereich gemessen. Die Meßergebnisse konnten mit dem Modell des „kleinen Polaron“ gedeutet werden, nach dem die Transporteigenschaften durch thermisch aktivierte Plat…
It is generally agreed that the rate of grain growth in metallic systems may be expressed by an equation that describes the square of the average diameter as being proportional to the time of annealing at constant temperature. The proportionality constant is exponentially dependent on temperature as normally expected…
Domain walls in ferromagnetic films may be imaged by out-of-focus electron microscopy. The wall images are light or dark depending on the relative sense of the magnetization either side of the wall, the incident electron beam being diverged or converged about the wall position. A relationship is obtained between the i…
Electron irradiation below 1-Mev and subsequent recovery in copper have been investigated. The minimum threshold displacement energy is found to be less than 22 ev. The details of the recovery in stage I, as a function of electron energy, are found to be more complex than anticipated. Specifically, ${\mathrm{I}}_{a}$…
Self-diffusion in liquid tin has been measured by the capillary-reservoir technique covering a temperature range of over 700°C. Considerable deviation of the data from linearity on a log D versus 1/T plot was found which is of the general type predicted on the basis of a fluctuation theory proposed by one of the autho…
Crystallinity and crystallite size determinations have been carried out on a number of samples of swollen, hydrolyzed, and swollen and hydrolyzed cotton fibers, employing x-ray diffraction techniques and a Geiger counter recording spectrometer. A new hi variate analysis technique has been developed in order to determi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE SOLUBILITY BEHAVIOR OF HYDROXYLAPATITEVictor K. La MerCite this: J. Phys. Chem. 1962, 66, 6, 973–978Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/j100812a003https://doi.org…
The mechanism of crystal nucleation in a titania-magnesia-alumina-silica glass has been studied by light scattering. Predominantly isotropic scattering centers become anisotropic during the initial crystallization process. This is interpreted as crystal nucleation within glassy concentrations fluctuation of titania. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Tricyclo[5.3.0.02,6]decane System. The Photodimers of CyclopentenonePhilip E. EatonCite this: J. Am. Chem. Soc. 1962, 84, 12, 2344–2348Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi…