Materials Literature
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A square-lattice model of amphiphile-oil–water systems is developed in which oil and water molecules occupy single sites and amphiphiles occupy chains of sites. Energies and free energies estimated by Monte Carlo sampling of configuration space show that when the head, or water-loving portion, of the amphiphile has no…
The transformation, microstructural development, and densification of an α‐alumina‐seeded boehmite sol‐gel was studied. α‐Alumina particles are shown to act as nuclei for the trans‐ formation of θ‐ to α‐alumina and to result in an increase in the transformation kinetics and lowering of the transformation temperature b…
This work explains with comprehensive terms for non specialists what the Organic Metals are ("coductive plastics"). Those new materials will be in the near future a true revolution on several technology fields.
To sit in judgement values of the technic level reached in a cement plant, it is surprisingly objetive to analyse work, planning and control development about Refractories subject. Considering and recognizing the validity of this pragmatic axiom it will offer unexpected improvement perspectives of the productivity rat…
In this work an account is given of the results obtained when the differential pulse polarography (differential pulse anodic stripping voltametry) is applied to the determination of the contents of the compounds by molybdenum (VI), nickel (II) and vanadium (V) in a common portland cement which are in quantities of the…
TGL 11357 Norm specifies the express use of the cement: — Portland with a content between 0% and 5% of C3A, or — Supersulphathed iron foundry (with conditions), or — Aluminates (with conditions) when the agressiveness of the water and/or of an agressive sulphatic ground (among others) will be touching the concrete wor…
In this article there are explained the necessary steps to make up a quantitative analysis of alpha-quartz applying the technique of rays X diffraction, in artificial mixtures of anhydrous portland cement and synthetic calcite, which contents are known.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurther insight into magnetostructural correlations in binuclear copper(II) species related to methemocyanin: x-ray crystal structure of 1,2-.mu.-nitrito complexVickie McKee, Maruta Zvagulis, and Christopher A. ReedCite this: Inorg. Chem. 1985, 24, 19, 2914–2919Publication D…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and spectroscopic and magnetic properties of lutetium(III) phthalocyanine derivatives: LuPc2.CH2Cl2 and [LuPc(OAc)(H2O)2].H2O.2CH3OHAndre De Cian, Mehdi Moussavi, Jean Fischer, and Raymond WeissCite this: Inorg. Chem. 1985, 24, 20, 3162–3167Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFree radical and free atom reactions in the sonolysis of aqueous iodide and formate solutionsEdwin J. Hart and Arnim HengleinCite this: J. Phys. Chem. 1985, 89, 20, 4342–4347Publication Date (Print):September 1, 1985Publication History Published online1 May 2002Published ini…
The least-squares refinement of non-centrosymmetric crystal structures as inversion twins is presented. It is shown that the absolute-structure (twin) parameter x may be used to define the chirality or polarity of untwinned crystals. The method has been applied to 20 compounds. The least-squares refinement of the abso…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen bonding in polymers: infrared temperature studies of an amorphous polyamideDaniel J. Skrovanek, Stephen E. Howe, Paul C. Painter, and Michael M. ColemanCite this: Macromolecules 1985, 18, 9, 1676–1683Publication Date (Print):September 1, 1985Publication History Publ…
ABSTRACT The variability of marine diatom Si:C and Si:N composition ratios was examined to assess their utility as ecological conversion factors. Twenty‐seven diatom species grown under an 18:6 h LD cycle and sampled at the end of the light period gave mean ratios, by atoms, of 0.13 ± 0.04 and 1.12 ± 0.33 for Si:C and…
High-resolution neutron diffraction studies have been carried out on KH2PO4 at 1K, 10K and 20K below Tc (123K), and on 95% deuterated K(DxH1-x)2PO4 at 2K, 6K and 10K below Tc (224K). The results show that in both cases the structural ordering is homogeneous: the temperature dependence of the proton (deuteron) ordering…
X-ray induced luminescence, photoluminescence and thermoluminescence of nominally pure Bi 4 Ge 3 O 12 crystals are studied within the 12K-295K temperature range. The broad emission band reported by other workers for radio- and photoluminescence is observed to present some structure. thermoluminescence spectra exhibit…
The effect of electron-electron interactions on the thermoelectric power for hopping transport in two and three dimensions is calculated in the low-temperature limit. While the conductivity requires a very precise measurement to extract a temperature exponent with enough precision to determine the role of the interact…
I report on the first complete experimental characterization of elastic and inelastic two-electron scattering processes in a ferromagnet. By explicit measurement of the spin polarization of primary and scattered electrons the contributions of all four partial scattering rates are determined. The Stoner continuum in Fe…