Thermodynamics of elasticity of natural rubber
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Polyoxymethylene from trioxane by solid state polymerization: A case of twinning in a synthetic polymer
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…
Metal Complexation of the Tetracycline Hydrochlorides
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…
Far Infrared Dielectric Dispersion in KTaO3
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…
264. 2,2′-Bipyridyl and o-phenanthroline complexes of titanium( IV ) and vanadium( IV )
R. J. H. Clark, J. Chem. Soc., 1963, 1377 DOI: 10.1039/JR9630001377
Radiation effects on organic materials
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…
Thermal stability indices for polymeric materials based on energy considerations
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…
Crystalline organization in useful plastics
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…
Schwingungsfrequenzen von Titanaten
Abstract Zwei der drei ultrarotaktiven Eigenfrequenzen von Titanaten können angenähert beschrieben werden als verursacht durch eine antisymmetrische Schwingung einer OTiO‐Kette und durch eine Schwingung des Erdalkaliatoms gegen acht seiner zwölf nächsten O‐Nachbarn. Aus den beobachteten Spektren werden folgende Kraf…
Investigation of the Incorporation Process of the Manganese Activator in CaS and SrS Phosphors
Abstract An investigation is made of the process by which the activator Mn is incorporated in CaS and SrS, by studying its dependence on activator concentration, flux addition and firing atmosphere. The dependence of the amount of Mn incorporated during the firing on that present before firing was investigated using a…
Properties of Radiation Shielding Concrete
First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Please select a country... Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua And Barbuda Argentina Armenia Aruba Australia Austria Azerbai…
Polymerization of acrylonitrile by electron transfer catalysts
Abstract The heterogeneous polymerization of acrylonitrile in tetrahydrofuran by chain transfer catalysts: monosodium anthracene, disodium anthracene, sodium naphthalene, monolithium anthracene, and lithium naphthalene was investigated. The free radical formed in the initiation was found to participate in the polymeri…
1069. Thermal decomposition of potassium metaperiodate
B. R. Phillips and D. Taylor, J. Chem. Soc., 1963, 5583 DOI: 10.1039/JR9630005583
A mathematical treatment of the dynamic behaviour of a power-transformer winding under axial short-circuit forces
The paper gives the mathematical formulation, and indicates the mathematical solution, of the problem of the dynamic behaviour of a transformer winding under axial short-circuit forces, certain basic physical assumptions being made initially. Various practical tapping arrangements are considered so that there may be e…
Studies of the Glass-formation Range of Silicate Systems
Following a previous report “Studies of the Glass-formation Range of Borate Systems” (This Journal, 69, 282 (1961)), we studied the glass-formation range of silicate systems. Although silicate glasses have long been used, sufficient systematic studies of the glassformation ranges of silicate systems have not yet been…
495. Steric effects in di- and tri-arylmethanes. Part VIII. Electronic absorption spectra of planar derivatives of Michler's Hydrol Blue
C. Aaron and C. C. Barker, J. Chem. Soc., 1963, 2655 DOI: 10.1039/JR9630002655
Reactions (p, 2pxn) sur le thorium 232 de 30 à 120 MeV
On a mesuré les sections efficaces de formation des isotopes 224, 225, 226, 227, 228 de l'actinium dans le thorium 232 bombardé par des protons de 30 à 120 MeV. Dans le domaine de basses énergies (30 à 80 MeV) la formation des Ac est attribuable aux processus (p, αxn) .
Coloration of Yttrium‐Doped CaF2 and SrF2 Crystals by X‐Ray Irradiation
Abstract CaF 2 and SrF 2 crystals are doped with trivalent yttrium ions, and X‐irradiated, which results in similar coloration spectra for both substances. The bands seem to satisfy MOLLWO 's relation v a 2 = const, since the SrF 2 bands are shifted to longer wavelengths compared with the corresponding CaF 2 bands. Th…
Anodic Film Growth by Anion Deposition in Aluminate, Tungstate, and Phosphate Solutions
Films were obtained by anodic treatment of Al, Mg, Ni, Fe, Zn, Bi, Cd, Co, and Cu in and Al, Bi, Cd, Cu, and Zn in . A formation voltage of 30v was applied for 10 min in all cases except Al in where the maximum formation voltage was 100v. The anodic films were studied by electron diffraction and chemical analyses. Fil…
Zur Deutung der Tieftemperatur‐Elektronenbestrahlung von Metallen
Abstract Bei Elektronenbestrahlung von Metallen interessiert der totale Wirkungsquerschnitt σ d ( E ) ( E Elektronenenergie) für Stöße, die zu einer bleibenden Verlagerung der von Elektronen getroffenen Atome (Primäratome) führen. σ d ( E ) wird experimentell aus Widerstandsmessungen bestimmt und kann theoretisch bere…