Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of isopolymetalate-pillared hydrotalcite via organic-anion-pillared precursorsMark A. DrezdzonCite this: Inorg. Chem. 1988, 27, 25, 4628–4632Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published inissue 1 December 1988http…
Gypsum is a relatively low-cost building material much abounding in our country. When it is put in contact with steel, it may produce high corrosion rates due to its pH value (close to 7). This work reports the results obtained in studying the corrosion rates of bare and galvanized steel in contact with gypsum and pla…
This part II A presents and discusses only the experimental results obtained employing 21,0 % SO3 in the selenitouse conglomerant-mixture cement P-1 (14,11 % C3A) or P-31 (7,62 % C3A) or PUZ-8 which more gypsum, respectively. These experimental results obtained thus with the parameters Δ L (%), [Δ L (%)/g cement] and…
The advances in laser technology have permitted the development of numerous applications, in particular diffraction spectrometry by laser beams for the determination of the distribution curve of the particle sizes of different materials; this permits one to obtain the distribution of particle size in both wet and dry…
The increase of active mineral admixtures consumption in contemporaneous cementiceous materials has stablished revision of some test methods. In the evaluation of blended cement durability, many accelerated tests of large application in portland cements become unvalid, because they don't allow to value the improvement…
Abstract Macromolecules intimately associated with the mineral phase of two species of scleractinian coral skeletons are extracted in different ways and partially characterized in some detail for the first time. They are shown to contain an assemblage of glycoproteins in which the protein moiety is rich in acidic amin…
A statistical model, based upon earlier models of Brown [J. Appl. Phys. 33, 3022 (1962)] and McIntyre [J. Phys. D 3, 1430 (1970)] has been developed to examine the magnetization reversal of domain-wall nucleation controlled permanent magnets such as sintered Fe-Nd-B and SmCo5. Using a Poisson distribution of the defec…
The hydrodynamic transport properties of hard-sphere dispersions are calculated for volume fractions (φ) spanning the dilute limit up to the fluid–solid transition at φ=0.49. Particle distributions are generated by a Monte Carlo technique and the hydrodynamic interactions are calculated by Stokesian dynamics simulatio…
We developed engineering models for forces on rigid, long rods with spherical, ogival, and conical noses that penetrated rate independent, elastic-perfectly plastic targets. The spherical and cylindrical, cavity-expansion approximations simplified the target analyses, so we obtained closed-form penetration equations.…
This review article presents a short description of the historical development of the chemistry of thermotropic liquid crystals and the modern molecular-statistical interpretation of the liquid crystalline state. A short survey on the present state of the liquid crystal chemistry, divided in conventional (rod-like) an…
Results of experiments to study the effect of grain size and grain-size distribution on the intrinsic coercivity and the hysteresis loop of sintered Fe-Nd-B magnets are presented. It is shown that the intrinsic coercivity decreases as the average grain size of the magnet is increased. It is also shown that the intrins…
The rarefaction shock wave produced by an extracorporeal shockwave lithotripter can result in liquid failure at numerous discrete sites near the second focus. When the liquid fails, vapor-filled cavities can grow to relatively large sizes and subsequently collapse with enormous violence. This phenomenon, called acoust…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermally irreversible photochromic systems. A theoretical studyShinichiro Nakamura and Masahiro IrieCite this: J. Org. Chem. 1988, 53, 26, 6136–6138Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published inissue 1 December 1988https:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonooxygenase-like oxidation of hydrocarbons by hydrogen peroxide catalyzed by manganese porphyrins and imidazole: selection of the best catalytic system and nature of the active oxygen speciesP. Battioni, J. P. Renaud, J. F. Bartoli, M. Reina-Artiles, M. Fort, and Daniel. M…