Materials Literature
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If J ( t )- iK ( t ) is the mean value of FF * for cells separated a distance t in the hkl direction, the mean-square broadening due to mistakes is W 2θ = - [λΔ(2θ) / 2π 2 cos θ] × [ J '(0) / J (0)] - [λ 2 / 4π 2 cos 2 θ] [ J ''(0) / J (0) + { K '(0) / J (0)} 2 ] where Δ(2θ) is the range of 2θ used in evaluating W 2θ…
Abstract Durch Grenzflächenpolykondensation wurde aus Hexamethylendiamin‐1,1,6,6,N,N′‐D 8 bzw. Adipinsäuredichlorid‐2,2,5,5‐D 4 Nylon 6,6 hergestellt, das in α‐Stellung zur Amidgruppe spezifisch auf der Amin‐ oder Säureseite (N‐vicinal und CO‐vicinal) deuteriert ist. Mit Hilfe der Infrarotspektren der aus diesen Probe…
M. J. M. Leask, L. E. J. Roberts, A. J. Walter and W. P. Wolf, J. Chem. Soc., 1963, 4788 DOI: 10.1039/JR9630004788
Stable phases in the rare earth oxide systems are tabulated and discussed. New data on the structure of sesquioxides quenched from the melt are reported. The structural interrelations between the A, B, and C type sesquioxides and the fluorite dioxides are pointed out. The sequences of several intermediate oxides in th…
Indium‐doped, copper‐doped, and undoped cadmium oxide films were prepared by reactive sputtering. The oxygen vacancy concentration in these films was changed by varying the oxygen pressure in the sputtering chamber. Electrical properties, spectral transmittance, and Hall effect were measured on doped and undoped speci…
Thin rectangular specimens of tantalum were oxidized on one side at 500°C and 1 atm oxygen pressure. From curvature measurements, the bending stresses arising as a consequence of the oxidation process were determined and correlated with known oxidation rate behavior and oxide morphology. The simplest stress model, tha…
Careful comparisons of cross sections for formation of 19 products of copper spallation by 3- and 30-GeV protons indicate only a small energy dependence in this energy range. As the energy is increased from 3 to 30 GeV, products of $A>40$ decrease in yield by 15% or less, except for some highly neutron-deficient sp…
When an electric field is applied to a metal, in addition to the transport of electrons, a relatively small transport of the metal ions also occurs. This process of mass transport of metal ions is sometimes referred to as electromigration or electrodiffusion, and will be referred to in this review as electrotransport.…
The Fabry-Perot modulator, consisting of Fabry-Perot etalon plates separated by an electrooptic material such as KDP, is analyzed in detail. Time-dependent perturbation theory is used to describe the coupling of the axial modes by spatial and time varying perturbations in the dielectric constant. The perturbations are…
A theory of the electrode potential of nonstoichiometric electron conductive metal oxides on a foreign metal is presented. When the oxygen ions of the oxide are in equilibrium with the electrolyte the oxide electrode potential is p H with the free enthalpy for the reaction as a function of the degree of oxidation n. T…
The electrical resistivity of Na x WO 3, Li x WO 3, and K x WO 3 has been measured at 300° K. The range of x values was 0.25 < x < 0.9. All resistivities were characteristic of a metal and lie on a single curve. Extrapolation of the conductivity curve to zero conductivity indicated that the tungsten bronzes should be…
G. I. Harris, J. Chem. Soc., 1963, 5978 DOI: 10.1039/JR9630005978
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Abstract The products obtained by sublimation or radiation of trioxane byhigh energy radiations have been examined by X‐ray diffraction analysis. It have been possible to demonstrate that they consist of twinned crystals of hexagonal polyoxymethylene. By using rotating and WEISSENBERG photographs, the geometric correl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal Complexation of the Tetracycline HydrochloridesJames T. Doluisio and Alfred N. MartinCite this: J. Med. Chem. 1963, 6, 1, 16–20Publication Date (Print):January 1, 1963Publication History Published online1 May 2002Published inissue 1 January 1963https://pubs.acs.org/doi…
The room-temperature reflectivity of single-crystal KTa${\mathrm{O}}_{3}$ has been measured from 5000 to 77 ${\mathrm{cm}}^{\ensuremath{-}1}$. These data have been analyzed by a Kramers-Kronig relation and by classical dispersion theory. The three infrared-active fundamental vibrations allowed by the lattice symmetry…
R. J. H. Clark, J. Chem. Soc., 1963, 1377 DOI: 10.1039/JR9630001377
Crosslinking, or polymerization, and cleavage are the chief radiation effects on organic compounds. In a study of lubricants, the stability of the base oil was the most important as pect of radiation resistance. Polyphenyl ethers and alkyl aromatics were the chief lubricants studied. The success of the organic cooland…
Abstract Analysis of thermogravimetric weight loss data from the literature indicated correlations between the overall energietics of decomposition and characteristics of the thermogravimetric curves for measurements made under nitrogen. Such correlations provide a means for comparing relative thermal stabilities of p…
Abstract The size of the crystallites in nylon 66, polytetrafluoroethylene, and polyethylene correlates with the degree of crystallinity. This supports the suggestion that the amorphous content of partially crystallized polymers can be attributed to chain folds and other regions directly related to the crystalline str…