Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOXYGEN ADSORPTION RELATED TO THE UNPAIRED d-ELECTRONS IN TRANSITION METALSM. L. B. Rao, A. Damjanovic, and J. O'M. BockrisCite this: J. Phys. Chem. 1963, 67, 11, 2508–2509Publication Date (Print):November 1, 1963Publication History Published online1 May 2002Published inissue…
Abstract The purpose of this article is to review the developments in antioxidants for rubber over the past 25 years since the publication of Davis and Blake's “Chemistry and Technology of Rubber”. The intent is to provide a guide for rational use and further development. Accordingly, the organization of the material…
The anisotropy of nonwoven fabrics of various types has been studied in terms of modulus, strength, breaking extension, and fiber orientation. Polar diagrams for these quantities are given. Another important factor is the degree of curl in the fibers, and results are compared from different types of fabric and differe…
SUMMARY: The experiments described establish the importance of the pentose cycle in carbohydrate breakdown by Staphylococcus aureus. No Entner-Doudoroff pathway was found. Another feature is the extensive glucose effect: growth in glucose enhanced glycolysis suppressed the Krebs cycle, decreased the activity of the pe…
The temperature dependence of the X-ray diffraction intensity was precisely measured in order to clarify the nature of the ferroelectric phase transition in NaNO 2 . At the transition point, 163°C, the integrated intensity of the Bragg reflection decreases quite abruptly and distinct satellite peaks appear which are o…
Abstract Theoretical and experimental work is described which leads to a novel hypothesis for explaining the selectivity in heterogeneous vapor phase hydrocarbon oxidation catalysis. Two essential postulates of the hypothesis are: The oxygen atoms must be distributed on the surface of a selective oxidation catalyst in…
Abstract The primary purpose of this paper is to summarize some of the general relationships between chemical structure and transition temperatures for polymers. In addition to the two primary transitions, the melting point T m , and the glass transition T G , other transitions occurring either below T G or between T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHIGH-TEMPERATURE CHEMISTRY OF THE RUTHENIUM—OXYGEN SYSTEM1Wayne E. Bell and M. TagamiCite this: J. Phys. Chem. 1963, 67, 11, 2432–2436Publication Date (Print):November 1, 1963Publication History Published online1 May 2002Published inissue 1 November 1963https://pubs.acs.org/…
The microstructures of deformed copper-gold, copper-aluminum, copper-zinc and magnesium-aluminum alloys were examined by transmission electron microscopy. These specimens were further examined after exposure to solutions which do and do not cause stress corrosion cracking. Exposure to "cracking" solutions resulted in…
The transformation graphite to diamond is catalyzed by the Group VIII metals, manganese and chromium. The fact that these metals are good solvents for carbon tends to obscure their catalytic role in this transformation. It was found that copper-rich copper—nickel alloys capable of dissolving less than 0.06 at. % carbo…
To test the accuracy of the Hartree-Fock (HF) method and the reliability of x-ray measurements of the atomic scattering factor $f$, we have determined the scattering of Mo $K\ensuremath{\alpha}$ radiation by Ne, Ar, Kr, and Xe gases. Values of $f$ were obtained on an absolute basis with an accuracy of about \textonequ…
Received 6 September 1963DOI:https://doi.org/10.1103/PhysRevLett.11.381©1963 American Physical Society
Abstract A study has been made of the temperature dependence of the nucleation process in poly(ethylene oxide), and also of the related bulk crystallization rate determined from dilatometric experiments. Variations in these quantities were found, both above and below the melting point, and these are discussed in relat…
The thermal conductivity of intrinsic and heavily doped InAs crystals was determined between 300 and 900\ifmmode^\circ\else\textdegree\fi{}K using the diffusivity technique. The electronic contribution was computed using the measured electrical conductivity and the Seebeck coefficient. Adding 3\ifmmode\times\else\text…
Abstract The intrinsic viscosities and the slopes of η sp /C against C were estimated for natural rubber, polystyrene, and polyisobutene in hydrocarbon and high mol.wt. alkyl ester solvents. Whereas no correlation could be established between slopes and c.e.d. (cohesive energy‐densities) balance of the systems, the pl…
Adult oyster shells are composed mainly of calcite, but there are five small areas of aragonite: the resilium, the two pads at which the adductor muscle is inserted, and the two pads at which Quenstedt's muscles are inserted. Quenstedt's muscles are proposed as a name for the small modified, one-time pedal muscles of…
history of a great invention, and of a misconception concerning the inventors, is reviewed. In 1878, Ernst Abbe (1) proved that the resolution of the optical microscope is limited by the wavelength of light. This meant that even when immersion optics and ultraviolet light are used, the smallest detail that can ever be…
The compound K2B40~.4H20 = K~[B4Os(OH)4].2H20 is orthorhombic, space group P212121, with four molecules in a cell of dimensions a = 12"899, b = 11.774, c = 6"859 A. The positions of all atoms (including the hydrogen atoms) have been determined. The final R-index is 0.040, and the bond lengths have been determined to a…
The crystal structure of the (~ phase, Mo-:Ni (49-2 __0.2 at.% Mo) has been determined by singlecrystal X-ray analysis. For the orthogonal cell a=b =9.108 +0.005, c=8.852 +0.005 A, Z(exp)= 55.8 __ 0.2. Earlier unsuccessful trials were based on space group P4~212, although there are significant deviations toward orthor…
The preparation, determination of optical properties, and approximate crystal structure of the ferroelectric manganese (III) trioxides of holmium, erbium, thulium, ytterbium, lutetium, and yttrium are reported. The compounds crystallize in the hexagonal system, probable space group P6acm , and their structure is chara…