Materials Literature
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The syntheses of nitrogenous aluminosilicates of montmorillonite, mica, and zeolite groups first made in 1961 have been extended. Aluminosilicate and gallosilicate montmorillonites have been prepared above 200° in the presence of larger organic ions than previously, such as tetraethyl-, tetrapropyl-, and tetrabutyl-am…
Les propriétés de symétrie des opérateurs à trois particules à l'intérieur des configurations (d + s)N ont été étudiées dans les opérations des groupes de rotation R5 et R 6. La symétrie symplectique (Sp12) et l'espace de quasi-spin ont été également examinés. L'ensemble de ces résultats a permis de montrer que l'inte…
The review has been confined, in the main, to methods applicable to metallic coatings on metals, irrespective of the means employed to apply the coating, but where techniques used for organic, or more rarely ceramic, coatings appear to be applicable to metals on metals these have been included. The literature up to 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnthalpy, heat capacity, and heat of fusion of magnesium from 404.degree. to 1300.degree.KRichard Addison McDonaldCite this: J. Chem. Eng. Data 1967, 12, 1, 131–132Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 Janua…
Whole casein, αs-casein and k-casein were dephosphorylated with a phosphoprotein phosphatase prepared from beef spleen and their calcium-binding capacities were compared with those of respective native caseins by a ultracentrifugal method. The bindings of the calcium to 94% dephosphorylated whole casein and to 97 % de…
The inhomogeneous mechanism for the crystallographic transformation of brucite (Mg(OH)2) to MgO postulated by Ball and Taylor 1 is re-examined. This postulate was based upon the observation of X-ray reflections attributable to a spinel structure in decomposed brucite crystals. In the present work a relatively pure Mg(…
Abstract This paper treats some theoretical premises determining peculiarities of acetylene polymerization and properties of polyene systems containing carboxy groups. Some kinetic mechanisms of the radiation polymerization of propiolic acid in the liquid phase were experimentally studied. It is shown that solid‐state…
Systematic studies were carried out all the formatioll of recl)'stallizatioll. texture of 3 0 oSi-Fe single crystals with /Jre-selected orientation which were cold rolled to a range from 6 to 95%, Change rif the annealing texture was successively examined by using the X-ray pole figure method in relation to the metall…
Abstract Stacking faults are observed by transmission electron microscopy in face centred cubic TaC 0.75 . These stacking faults have the same contrast as intrinsic faults in face centred cubic metals; they do not exist in nearly stoichiometric carbides. No metallic plane relaxation is detected in the neighbourhood of…
The current-time relationship is derived for the following reaction scheme for electrocrystallization: A discussion of the limiting cases for potentiostatic experiments is presented. The corresponding results for the relaxation techniques (particularly the faradaic impedance) are also obtained.
The elastic properties and thermal expansion coefficients of two‐phase ceramic bodies were determined in order to study the effect of the difference in thermal expansions of the two phases. Room‐temperature elasticity was determined by a dynamic method. These values were extrapolated to theoretical density to obtain v…
The fruitful application of refined analytic techniques for treating mass transfer problems in electrochemical systems, whether these systems be expe:rirlental tools or industrial pr:::-ces.ses,requi:"e
The electrical conductivity of calcium titanate crystals grown by flame-fusion and fluxed-melt methods has been studied. The conductivity of both types of crystals has been found to be time dependent and initial values between 10 -11 and 10 -13 ω -1 cm -1 are reported, depending upon the electrodes used. Ohmic behavio…
This paper presents the results of measurements of the properties of GeSeTe, a new chalcogenide glass. When purified, the glass exhibits good transmission in the infrared between 2 and 18 μ. Electrically the glass behaves as a semiconductor with an energy band gap of 1.72 eV. Several other properties of GeSeTe and clo…
Some properties of Cu-Zr-Cr alloys containing more than about 0.5% zirconium and various amounts of chromium have been studied. The isothermal sections of copper corner of Cu-Zr-Cr equilibrium diagram mainly at 950° and 900°C have also been studied. The results obtained were as follows.(1) The properties of the alloys…
valency angle' for sodium pyrophosphate is 127 . Of the three bond lengths in the -PO 3 group, P-O(3) = 1.512/~ is slightly the shortest. This seems to correlate with the involvement of 0(3) in the smallest O-P-O(1) angle, since a similar effect occurs in the above three sulphates.
Between the years 1927 and 1938 the French engineer E. Roth developed a powerful method for the solution of boundary-value problems in electrical engineering. He applied the method to problems in heat conduction and magnetic-field problems in electrical machines and transformers, although the application of the method…
Abstract The excellent high temperature properties of aromatic polyimides, well known in films and enamels, have also been demonstrated in fibers. Current investigations show that experimental aromatic polyimide fibers have a very high level of thermal and dimensional stability and property retention at high temperatu…
Abstract The kinetics of poly(vinylene carbonate) (PVC) and ethylene carbonate (EC) aminolysis with n ‐butylamine (BA) in DMF solution was investigated. The EC aminolysis is catalyzed by final product and by BA itself but the reaction kinetics follows satisfactorily the equation – d [BA]/ dr = k [BA][EC]; k 2 increase…
A. Sacco and M. Rossi, Chem. Commun. (London), 1967, 316 DOI: 10.1039/C19670000316