Cementos que contienen 20 y 30 por ciento de cenizas volantes de Puentes de García Rodríguez y de Ponferrada
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Materials Literature
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Consideraciones sobre el ensayo de ANSTETT y el comportamiento de los cementos frente a sulfatos
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Aplicaciones prácticas de la espectroscopía de absorción infrarroja en el estudio de los crudos, del clínker y del cemento portland anhidro
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La serie de tamices de la DIN 1045 y la determinación del módulo de finura de Abrams
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Publicaciones del I.E.T.c.c. de MATERIALES de CONSTRUCCIÓN
Bibliografía
The System MgO‐MgCl 2 ‐H 2 O at 23°C
Solubilities of MgO in aqueous HC1 solutions at 23°±3°C were measured and combined with analyses of neat magnesium oxychloride cements, cured in sealed containers, to construct an equilibrium phase diagram for the system MgO‐MgCl 2 ‐H 2 O. Specific gravities and acidities of solutions saturated with MgO and relative h…
Raman Scattering and Infrared Reflectance in 2H-MoSe2
Raman scattering and infrared reflectance have been measured in 2H-MoSe 2 . We observed all Raman-active modes, A 1g , E 1g , E 2g 1 and E 2g 2 , and two infrared-active modes, E 1u 2 and A 2u 2 . Intralayer force constants are estimated from the central force model. The bond between metal (Mo) and chalcogen (Se) pred…
Dynamic recrystallization of olivine single crystals during high‐temperature creep
High‐temperature creep experiments were made on olivine single crystals under compressional stress to large strains. At strains larger than about 40 to 60%, dynamic recrystllization occurs and cellular wall dislocation structure is formed. Recrystallized grain size dg(µm) and cell wall spacing ds(µm) are dependent upo…
Selection rules for lanthanide optical activity
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelection rules for lanthanide optical activityFrederick S. RichardsonCite this: Inorg. Chem. 1980, 19, 9, 2806–2812Publication Date (Print):September 1, 1980Publication History Published online1 May 2002Published inissue 1 September 1980https://pubs.acs.org/doi/10.1021/ic50…
Interaction of metal particles with adsorbed dye molecules: absorption and luminescence
Absorption, luminescence, and excitation luminescence studies of dye molecules adsorbed onto ultrathin, variable-thickness silver films show strong coupling of the particle plasma resonances to the molecules. Luminescence from the dye is increased by excitation transfer from the silver particles for certain film thick…
Domain configuration and equilibrium size of domains in BaTiO3 ceramics
The domain structures in BaTiO3 ceramics differ from those of single crystals. The spatial configuration of the domains in the ceramics has been derived from etch patterns. All observed etch patterns can be described by two types of domain configurations. Thin layered domains separated by 90 ° walls are piled up to fo…
Hydrocarbon oxidations with oxometalloporphinates. Isolation and reactions of a (porphinato)manganese(V) complex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrocarbon oxidations with oxometalloporphinates. Isolation and reactions of a (porphinato)manganese(V) complexJohn T. Groves, William J. Kruper Jr., and Robert C. HaushalterCite this: J. Am. Chem. Soc. 1980, 102, 20, 6375–6377Publication Date (Print):September 1, 1980Publi…
Domain-Boundary Structure of Styrene-Isoprene Block Copolymer Films Cast from Solution. 4. Molecular-Weight Dependence of Lamellar Microdomains
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDomain-Boundary Structure of Styrene-Isoprene Block Copolymer Films Cast from Solution. 4. Molecular-Weight Dependence of Lamellar MicrodomainsTakeji Hashimoto, Mitsuhiro Shibayama, and Hiromichi KawaiCite this: Macromolecules 1980, 13, 5, 1237–1247Publication Date (Print):S…
STARCH GELATINIZATION PHENOMENA STUDIED BY DIFFERENTIAL SCANNING CALORIMETRY
ABSTRACT Differential Scanning Calorimetry (DSC) was used to study gelatinization phenomena of corn, potato, acid‐modified corn and smooth pea, and various legume starches. Two endothermic transitions were observed for starches heated in the presence of limited amounts of water (starch/water = 46–48% w/w). The effect…
Neutron diffusion studies of lattice vibrations in sodium nitrate
Inelastic neutron scattering measurements on a single crystal of NaNO 3 have yielded the temperature behaviour of the lattice vibrations propagating along the threefold axis. Frequency, shifts and anomalous linewidths are observed near the order-disorder transition temperature (T c =276C). In general, the observed beh…
Pyrolysis Process for Scrap Tires
The number of scrap tires in Japan in 1977 was estimated to be approximately 47 million with a total weight of 550 thousand tons. Although some of them are reused as reclaimed rubber, recapped tires, etc., it is difficult to recycle all of the scrap tires by the usual methods, therefore, there is a demand for new recy…
The Synthesis of a New Class of Polyphthalocyanine Resins
The principal driving force behind composite development is the requirement for lighter weight structural materials. New design concepts using easily fabricated, fiber-reinforced composites that combine superior stiffness with a high strength-to-weight ratio are needed to replace metal structure. Presently, epoxies an…
Structure and Properties of the Cholesteric Blue Phases
A study of Bragg reflections in both blue phases (BPI, BPII) of two mixtures of chiral and nonchiral biphenyls indicates both phases probably have the same translational symmetry and are either body-centered or simple cubic. The temperature dependence of several Bragg reflections indicates that the BPI-BPII transition…
The lanthanide crystal field in cubic Cs2NaLnCl6elpasolites
The octahedral lanthanide crystal field is calculated for trivalent lanthanide ions (Ln3+) in the cubic Cs2NaLnCl6 elpasolite structure. These calculations are based on a model which includes two types of Ln3+-ligand interactions: multipole(Ln3+)-point charge(ligand) and charge(Ln3+)-induced dipole(ligand). The latter…