Synthesis and Properties of ZnGeN[sub 2]
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Materials Literature
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THE EFFECT OF SURFACE CONDITIONS ON BOILING CHARACTERISTICS
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. Ph.D.
Biochemical and Morphological Studies on Collagens of Horny Sponges. Ircinia Filaments Compared to Spongines
Three kinds of fibers with a widely different morphology were isolated from several species of horny sponges: (a) intercellular collagen fibrils (spongin A of Gross3); (b) spongin fibers (spongin B3); and (c) a distinct filament present only in Ircinia. In the last two fibers elementary fibrils can be distinguished un…
Desorption of soil phosphate by anion‐exchange resin
Kinetics of phosphate desorption from twenty soils by anion‐exchange resin were not satisfactorily explained by either film diffusion (or ion exchange mechanism) mechanism or particle diffusion mechanism. Eut the phosphate desorption process was adequately explained by a two‐constant rate equation. The two constants,…
Macronet isoporous gels through crosslinking of dissolved polystyrene
Abstract Macronet isoporous polystyrene gels, obtained by cross‐linking of linear polystyrene in solution with p ‐xylylenedichloride or 4, 4′‐bis‐chloromethylbiphenyl, differ from conventional styrene‐divinylbenzene (DVB) copolymers by high solvent‐uptake capacity, high inner surface area, and the ability to increase…
X-Ray investigations of the crystal structure and phase transitions of YMnO3
Lattice constants and atomic parameters of YMnO3 were investigated from room temperature up to 1010°C. Lattice constant c decreases slowly with temperature, contrary to earlier publication. With rising temperature small changes of the crystal structure were observed. The paraelectric phase is probably disordered and t…
X-ray photoelectron spectroscopic study of the reaction of evaporated metal films with chlorine gas
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic study of the reaction of evaporated metal films with chlorine gasKosaku Kishi and Shigero IkedaCite this: J. Phys. Chem. 1974, 78, 2, 107–112Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inis…
A Kinetic Model for the Prediction of Hydrocracker Yields
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Kinetic Model for the Prediction of Hydrocracker YieldsBruce E. StangelandCite this: Ind. Eng. Chem. Process Des. Dev. 1974, 13, 1, 71–76Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://doi.org/10…
New aspects of the chemistry of transition metal phthalocyanines
Conference International Conference on Coordination Chemistry, International Conference on Coordination Chemistry, ICCC, Coordination Chemistry, Fifteenth, Moscow, USSR, 1973-06-25–1973-06-30 Published Online: 2009-01-01 Published in Print: 1974-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Experimental Test of Least-Squares Strain Gage Calculation Using Twinned Calcite
The least-squares strain is computed from calcite twin lamellae in cylinders of Indiana limestone experimentally shortened from 0 to 8.5 percent at 1.0-kb confining pressure, room temperature, and a constant strain rate of 10 −4 /sec. The best fit to the experimental results is obtained by using the inner width of the…
The Growth of Hydrous Oxide Films on Aluminum
The weight gains of Al specimens immersed for short times in water at 50°–70°C were measured. An analysis of these data and published results at other temperatures indicated that the kinetics of pseudoboehmite film growth in the temperature range 50°–100°C is determined initially by the nucleation and growth of hydrol…
Starch gelatinization
The dependence of the melting temperature of starch on its concentration in a polymerdiluent mixture was determined. The resultant data were analysed by application of the thermodynamic equations appropriate to a first-order phase transition. It is suggested that this analysis may be used to explain certain features o…
Effect of grain size on void formation during high-energy electron irradiation of austenitic stainless steel
Thin foils of an ‘ experimental ’ austenitic stainless steel, with and without dispersions of aluminium oxide particles, are irradiated with 1 MeV electrons in a High Voltage Electron Microscope at 600°C. Evidence of grain size dependent void nucleation, void concentration, and void volume swelling are presented for g…
X-Ray photoelectron spectroscopy of some uranium oxide phases
X-Ray photoelectron spectra of a variety of uranium oxides have been studied and compared with the spectrum obtained from the pure metal. The oxide phases studied were UO2·0, UO2·1, UO2·2, U4O9, U3O7, U3O8, and γ-UO3 where the formal oxidation number of uranium alters from IV to VI. Significant chemical shifts observe…
Use of the Langmuir method for kinetic studies of decomposition reactions: calcite (CaCO3)
The Langmuir method for measurement of vapour pressures has been tested for use in studies of decomposition reactions. The isothermal weight loss in vacuum from cleavage (10text-decoration:overline11) planes of calcite (CaCO3) single crystals was measured continuously at temperatures from 934 to 1013 K. The rate was c…
Accurate determination of a classic structure in the metal carbonyl field: nonacarbonyldi-iron
An equidimensional single crystal of Fe2(CO)9 has been used to reinvestigate the molecular structure. The results confirm all the main qualitative features originally reported by Powell and Ewens, and provide the level of accuracy needed for comparison with other structures and for molecular orbital calculations. The…
Assignment of the charge-transfer bands in some metal phthalocyanines. Evidence for the S= 1 state of iron (II) phthalocyanine in solution
Magnetic circular dichroism spectroscopy has been used to investigate the assignment of the charge transfer bands in a number of metal phthalocyanines containing first row transition metals. It has been shown that the band in cobalt(III) phthalocyanine dicyanide at 22.5 kK is not a charge transfer band but must be a t…
Thin-film adhesion
Adhesion is of vital interest in thin-film science because the fragile film relies on the underlying substrate, and the adhesion between the two for durability. In addition, the formation and structure of the film depend on the adhesive interaction between the depositing material and the substrate. Despite its general…
Quantum efficiency of diffusion limited energy transfer in La1−x−yCexTbyPO4
In this paper, we present a detailed study of the concentration and temperature dependences of the quantum efficiency of energy transfer between Ce3+ and Tb3+ in La1−x−yCexTbyPO4. The determination of the transfer quantum efficiency in terms of the donor luminescence lifetimes is critically compared with that in terms…
Improper ferroelectrics
Ferroelectrics in which the phase transition parameter is not the polarization are discussed from a phenomenological point of view. The concept of improper, pseudo proper and triggered ferroelectric phase transitions is introduced and compared with Aizu's concept of full, partial and faint ferroelectrics. Dielectric,…