Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular dynamics simulations of a supercooled monatomic liquid and glassJeffrey R. Fox and Hans C. AndersenCite this: J. Phys. Chem. 1984, 88, 18, 4019–4027Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984h…
Recently some mono-alkylated derivatives of β-D-glucopyranoside and thio-α-D-mannopyranoside were shown to exhibit liquid crystal properties. The structure of the phase produced by these materials was described as being of a layered smectic type. However, a full classification of the phase was not given. The present i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of block copolymers at a demixed homopolymer interfaceJaan Noolandi and Kin Ming HongCite this: Macromolecules 1984, 17, 8, 1531–1537Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs.or…
Kaolinite crystallites, which are pseudohexagonal platelets, generally are found not singly but as intergrowths or aggregates of several platelets. Until recently only coarser intergrowths (Figs. 1-2) could be imaged with SEM in sufficient detail for intersectional relationships to be unambiguously interpreted. With n…
Ferrous sulphate BP, FeSO4,7H2O, dehydrates to form FeSO4,4H2O when the relative humidity (RH) is less than 65%, or on heating at 40 degrees C. The tetrahydrate was also prepared by recrystallization at 60 degrees C from aqeuous solutions of the sulphate. Commercial dried ferrous sulphate BP is FeSO4,H2O but the metho…
Abstract The intercalation of formamide, potassium acetate, and hydrazine by halloysite and/or ka-olinite-rich samples, with and without subsequent displacement of the interlayer species by water or glycerol/water, has been investigated. Halloysite, as such, or in mixtures with kaolinite is completely expanded by all…
The main processes of metallic corrosion in primary circuits of advanced high-temperature gas-cooled reactors (HTGRs) at temperatures above 800 °C are oxidation, carburization, and decarburization. These are caused by helium impurity traces of H2O (causing oxidation and decarburization), CO (causing oxidation and carb…
Abstract The activities of TiO2-supported bimetallic catalysts of Fe–Co, Co–Ni and Ni–Fe for CO conversion were greater than those of pure metal catalysts. The selectivities of alloy catalysts relative to pure metal catalysts were shifted to higher molecular hydrocarbons.
Abstract. Calcium is the soluble cation that occurs in largest amount in most soils. It does not take part directly in the proton transfer reactions involved in pH‐buffering, but it provides the cation charge balance for these reactions. It is also the complementary cation in formulations of chemical potential for man…
Abstract Adsorption of Cu 2+ and Co 2+ by synthetic imogolite, synthetic allophanes with a range of SiO 2 / Al 2 O 3 ratios, and allophanic clay fractions from volcanic ash soils was measured in an ionic medium of 0.05 M Ca(NO 3 ) 2 . The effect of pH (and metal concentration) on adsorption was qualitatively similar f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of thermal degradation of polyurethanes. Effect of ammonium polyphosphateGiorgio Montaudo, Concetto Puglisi, Emilio Scamporrino, and Daniele VitaliniCite this: Macromolecules 1984, 17, 8, 1605–1614Publication Date (Print):August 1, 1984Publication History Published…
Molecular orbital calculations, using the Xa scattered wave method, were done for the clusters MnOl,0-, MnO?-, and MnOB- corresponding to Mn2*, Mn3*, and Mna* in octahedral coordination with O2-. Bond lengths representative of those observed in manganese oxides were chosen and 05 symmetry was used for each cluster. Th…
The bandstructures were calculated by the local-spin-density (LSD) method for the alloys Cu 2 MnAl, Ni 2 MnSn, Pd 2 MnSn, Pd 2 MnSb, Co 2 MnSn, Co 2 TiSn, Co 2 TiAl and Mn 2 VAl. We calculated the magnetic moments and the hyperfine fields for these alloys on the basis of the bandstructures. The peak near the Fermi lev…
Abstract An X-ray diffraction study of aqueous emulsions of a Na-montmorillonite shows that: (1) At low water content, the d-spacings of the montmorillonite increased stepwise with increasing water content; (2) At high water content, sharp (001) peaks due to regular stacking of montmorillonite layers were not detectab…
Abstract The negative surface charge of synthetic allophanes with a range of Si/Al ratios decreased and positive charge increased with increasing alumina content at a given pH. The phosphate adsorption capacity also increased with increasing Al content. That this relationship between composition and chemical reactivit…
This paper reviews the present status and art of liquid crystal displays. It discusses the fabrication and operational principles of dynamic scattering, twisted nematic, guest-host, dye phase change, tunable birefingence, thermally addressed smectic A mode, etc, displays. The potentialities of applications of these di…
We used first-order, Elovich, parabolic diffusion, and zero-order equations to describe the kinetics of K-Ca exchange in kaolinite, montmorillonite, vermiculite and soils of the Atlantic Coastal Plain Region. The first-order equation was the best of the various kinetic equations studied to describe the reaction rate o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid crystal phase transitions in a solution of rodlike and disklike particlesA. Stroobants and H. N. W. LekkerkerkerCite this: J. Phys. Chem. 1984, 88, 16, 3669–3674Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 Au…
A single-stage computer procedure to calculate an electron density map suitable to detect errors in a tentative macromolecular model has been developed. In this procedure, an atom of the tentative model does not contribute to the phases used to calculate electron density values at or near its current position, that is…
"Transmission Electron Microscopy. Physics of Image Formation and Microanalysis." Optica Acta: International Journal of Optics, 31(8), p. 848