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Preparación automática de muestra para e análisis por rayos X espectrométrico de cementos
Consideraciones y puntos de vista generales sobre automatización de fábricas de cemento
Alocución de bienvenida a los V Coloquios de Directores y Técnicos de Fábricas de Cemento, por el Exmo. Sr. D. José María Aguirre Gonzalo, Presidente del Consejo Técnico-Administrativo del Instituto Eduardo Torroja de la Construcción y del Cemento
Análisis rápido de un cemento por absorción Atómico
Discurso de introducción a los V Coloquios de Directores y Técnicos de Fábricas de Cemento; por el Ilmo. Sr. D. Jaime Nadal Aixalá, Director del IETcc
Discurso de despedida y de clausura de los V Coloquios de Directores y Técnicos de Fábricas de Cemento, por el Exmo. Sr. D. José María Aguirre Gonzalo, Presidente del Consejo Técnico-Administrativo del Instituto Eduardo Torroja de la Construcción y del Cemento
Conducción dinámico con ordenador de la preparación del crudo
Espectrómetro multicanal de rayos X, MRS-2, para la automatización de procesos
Estudio y corrección de los anomalías en el análisis por fluorescencia de rayos X
Visita a la fábrica de cementos de Portland Valderrivas, S A. Palabras de recepción del limo. Sr. D. Felipe Ynzenga Caramanzana, Consejero-Delegado de Portland Valderrivas, S A
The formation of micro shear bands in polystyrene and polymethylmethacrylate
The conditions under which amorphous polystyrene and polymethylmethacrylate deform inhomogeneously by the formation of fine shear bands have been investigated. The thermal history of the sample and the temperature and strain rate at which the deformation is carried out have been found to be critical. Stress-strain dat…
Infrared Studies of Segmented Polyurethan Elastomers. I. Hydrogen Bonding
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Studies of Segmented Polyurethan Elastomers. I. Hydrogen BondingR. W. Seymour, G. M. Estes, and S. L. CooperCite this: Macromolecules 1970, 3, 5, 579–583Publication Date (Print):September 1, 1970Publication History Published online1 May 2002Published inissue 1 Septe…
Electrical phenomena in amorphous oxide films
Thin layers of insulators, from 100 Å to 20 000 Å thick, have a number of interesting electrical properties. These properties include forming, which is a profound and essentially permanent change produced by an electrical field, and, after forming, differential negative resistance together with switching and memory ph…
Relativistic Calculation of Anomalous Scattering Factors for X Rays
Anomalous scattering factors Δf′ and Δf″ have been calculated relativistically for Cr, Fe, Cu, Mo, and Ag Kα radiations for the atoms Li through Cf. An interpolation scheme for other wavelengths is included in a separate report. Relativistic calculations of the photoelectric cross section have been made and the integr…
Bragg Reflection of Light from Single-Domain Cholesteric Liquid-Crystal Films
Reflection measurements have been made for the first time on single-domain cholesteric liquid-crystal films. We observed spectral structure and polarization character with obliquely incident light never seen with the previously studied disordered films. We also obtained numerical solutions to Maxwell's equations for o…
Sintered Diamond: A Synthetic Carbonado
Diamond powder is rapidly sintered into molded shapes at a pressure of about 65 kilobars and a temperature of 2500 degrees Kelvin. Other conditions of pressure and temperature are also suitable. The product compares favorably with natural carbonado in its properties.
Palladium: Preparation and Catalytic Properties of Particles of Uniform Size
A method has been developed for the preparation of uniform palladium particles of diameter from 55 to 450 angstroms. Uniform particles of gold layered on palladium were also synthesized. Hydrothermal treatment of aluminum hydroxide sol was used to prepare rods of alumina with uniform cross section from 100 to 500 angs…
Antiferromagnetism inV2O3
The existence of antiferromagnetic order in the monoclinic phase of ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$ has been confirmed by a neutron polarization analysis experiment. Conventional neutron-diffraction experiments on powders and single crystals have been performed to determine the magnetic structure. The observation…
Isotropic-Nematic Phase Transition in Liquid Crystals
The molecular-field description of the isotropic-nematic phase transition in liquid crystals is investigated. It is found that the effects of fluctuations may be observable, and the first corrections due to fluctuations to the light scattering and magnetic birefringence in the isotropic phase are determined. The effec…