Industrial Electrochemical Processes
Abstract not Available.
Materials Literature
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Magnetic Properties of Oxidized (Cation-Deficient) Titanomagnetites (Fe, Ti, _??_)43O4
A comprehensive study of the magnetic properties of nonstoichiometric (cation-deficient) titanomagnetites is described. Measurement of the saturation magnetization of synthetic samples provides information about the mechanism by which increasingly nonstoichiometric states evolve. It is concluded that in the spinel str…
Molecular field treatment of nematic liquid crystals
The Maier-Saupe theory of the nematic mesophase is extended to rod-like molecules interacting with a perfectly general anisotropic potential. The resulting series expansion for the pseudo-potential accounts quantitatively for the observed temperature dependence of the orientational order, even when the expansion is re…
Collagen and Gelatin in the Solid State
Current physicochemical knowledge on the structure of collagen is based almost exclusively on dilute solution measurements or on results from x-ray diffraction studies and electron microscopy of native and reconstituted collagen fibers and fibrils. A comprehensive treatise of this subject has recently appeared [1]; th…
On the Mechanism of Localized Corrosion of Iron and Stainless Steel
During pitting of iron and stainless steels the potential drop across the interface of the dissolving surface within the pit is in the region of active metal dissolution, even when the potential of the specimen surface is controlled at potentials as high at +1.4 (SHE), as well as during natural corrosion. This conclus…
High Temperature Oxides
Abstract not Available.
Makrocyclische Polyäther und ihre Komplexe
Abstract Die wichtigste und nahezu einzigartige Eigenschaft der makrocyclischen Polyäther („Kronenverbindungen”︁) ist ihre Tendenz zur Komplexbildung mit Alkalimetallsalzen und Salzen mit ähnlichen Kationen. Derartige Komplexe werden durch nichtgerichtete Coulomb‐Kräfte zwischen dem Kation und den negativen Enden der…
Polymer Compatibility
Polymer compatibility, as reviewed in this paper, will refer to the miscibility of homopolymers with each other and with random copolymers in the amorphous, noncrystalline state, with no distinction made between rubbers and glasses. This paper will not deal with mixed crystal formation in mixtures of crystalline polym…
Agarose Gel Electrophoresis
A simple technique for agarose gel electrophoresis allowing the simultaneous separation of 15 samples in less than one hour is described. The method is very suitable for clinical routine analyses of proteins in plasma and other body fluids since a good resolution is obtained with patterns which are easy to interpret.…
Entwickelung einer Theorie der Krystallstruktur
Book digitized by Google from the library of Oxford University and uploaded to the Internet Archive by user tpb.
Hot Workability
Hot workability relates to the ability of a metal or alloy to be deformed under conditions of high temperature (> O.6Tm, where Tm is the melting temperature in degrees Kelvin) and relatively high strain rates (10 -1 to 10 3 S -1 ). The two characteristics that govern hot workability are strength and ductility. In a…
Mechanical Properties of Polymers: The Influence of Molecular Weight and Molecular Weight Distribution
The molecular weight and molecular weight distribution of a polymer can markedly affect its mechanical properties. While this has been recognized for a long time, quantitative studies have been relatively difficult to perform for a number of reasons. A major problem has been the characterization of the complete molecu…
The mechanical properties of bivalve (Mollusca) shell structures
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Mechanism of epoxidation of olefins by covalent peroxides of molybdenum(VI)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of epoxidation of olefins by covalent peroxides of molybdenum(VI)K. B. Sharpless, J. M. Townsend, and D. R. WilliamsCite this: J. Am. Chem. Soc. 1972, 94, 1, 295–296Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inis…
Stability of aqueous films on hydrophobic methylated silica
Experiments in which a small gas bubble was slowly advanced towards a polished silica plate under dilute aqueous solutions have shown that “thick” equilibrium films are formed not only on clean, hydrophilic, silica, but also on methylated, hydrophobic, silica. The latter films are metastable, collapsing when disturbed…
Dynamics of pH in Controlled Stirred Tank Reactor
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of pH in Controlled Stirred Tank ReactorT. J. McAvoy, E. Hsu, and S. LowenthalCite this: Ind. Eng. Chem. Process Des. Dev. 1972, 11, 1, 68–70Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissue 1 January 1972https:/…
Electrical conductivity by the bis(1,3-dithiole)-bis(1,3-dithiolium) system
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical conductivity by the bis(1,3-dithiole)-bis(1,3-dithiolium) systemFred Wudl, Darold Wobschall, and Earl J. HufnagelCite this: J. Am. Chem. Soc. 1972, 94, 2, 670–672Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissu…
Grain Growth and Stress Relief in Thin Films
The effect of grain growth on stresses in films is discussed. Grain growth generally leads to stress relaxation when the film is under a compressive stress. When the initial grain size is below a critical value, grain growth can occur by normal boundary migration and generates a tensile stress in the plane of the film…
Multiple scattering theory in condensed materials
Second-order elliptic differential equations (such as the time-independent single particle Schrödinger equation) may be solved in a finite closed disjoint region of space independently of the rest of space. The solution in all space may then be determined by solving the equations in the exterior region together with b…
Non-singular disclinations of strength S = + 1 in nematics
It is shown that the energy of a screw disclination of strength + 1 [1] (2 π rotation of the director around the line) is reduced if the molecules are allowed to relax out of the plane perpendicular to the line. This solution has no singularity on the axis, r = 0. The calculation is done in the case of the anisotropic…