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Equipo Editorial1985-12-01Materiales de Construccion
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Estudio de la aptitud de un material como adición activa al cemento
The study of the suitability of a material for its use as an active addition to the cement and, really, the evaluation of its puzzolanic capacity is a problem which is frecuently present. In this work, a line of behaviour to approach this problem is explained in a practical and definite way, pointing methods of possib…
Relaciones entre porosidad, contenido en arcillas y durabilidad de areniscas
The petrographical characterization of three spanish sandstones from Villamayor (Salamanca), Somió and Tazones (Asturias) is presented. The significance of the percentage and type of the clay minerals cementing the grains on the pore system geometry, for the rocks studied, is especially emphasized. Besides, correlatio…
Aditivos para hormigones, morteros y pastas. Normativa: clasificación y definiciones
In this work, classification and definitions of the additives used to produce concretes, mortars and plasters which base is cement, aim and application field of the UNE 83-200-84 norm (edited on December 1984) elaborated by Working Group n.º 2 "Additives" of the IRANOR Technical Commission n.º 83 "Concretes", are stud…
Arenas calizas para la confección de hormigones: influencia de sus finos calizos y arcillosos a nivel de morteros
For the purpose to obtain data for a next revision of the Spanish Concrete Norm about the content of fines in sands fixed to date on 5 % without exceptions, an exhaustive research project has been undertaken. Following, the results of the influence of different contents of calcareous and clayey fines in mortar mechani…
Análisis cuantitativo por difracción de rayos X de cuarzo-alfa en una matriz de cemento portland anhidro con equipos Philips modelo PW-1710 y PW-1700
This article, explains the necessary steps to obtained a quartz-low quantitative analysis in an anhydrous Portland cement matrix, by means of a simple addition of a little quantity of Corydon to the sample and applying a simple mathematical formula which gives directly the crystalline compound percentage which determi…
Polymers in two dimensions: renormalization group study using three-parameter model
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymers in two dimensions: renormalization group study using three-parameter modelJack F. Douglas, Binny J. Cherayil, and Karl F. FreedCite this: Macromolecules 1985, 18, 12, 2455–2463Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Pub…
Computer simulation of the free energy of polymer chains with excluded volume and with finite interactions
We have recently suggested an approximate computer simulation technique, based on the scanning method, which enables one to extract the entropy (and hence the free energy) of polymer chains from a relatively small sample. So far this technique has been discussed in terms of chains with excluded volume (EV); in the pre…
Correlations between chain parameters and failure characteristics of polymers below their glass transition temperature
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelations between chain parameters and failure characteristics of polymers below their glass transition temperatureShaul M. AharoniCite this: Macromolecules 1985, 18, 12, 2624–2630Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Publi…
La alveolización y otras formas de alteración desarrolladas sobre las areniscas del palacio de Revillagigedo de Gijón (Asturias)
The various forms of alteration presented in the monumental sandstones of the “Palacio de Revillagigedo” (Gijón, Spain) are identified, localized and studied. Among them, the alveolation phenomena (honeycomb erosion) stand aut; the morphologically different alveoles are described and their genesis interpreted.
The paramagnetic metal effect on the ligand localized S1 .apprx. .fwdarw. T1 intersystem crossing in the rare-earth-metal complexes with methyl salicylate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe paramagnetic metal effect on the ligand localized S1 .apprx. .fwdarw. T1 intersystem crossing in the rare-earth-metal complexes with methyl salicylateSeiji Tobita, Masayuki Arakawa, and Ikuzo TanakaCite this: J. Phys. Chem. 1985, 89, 26, 5649–5654Publication Date (Print)…
A new crown heteropolyanion K28Li5H7P8W48O184.92H2O: synthesis, structure, and properties
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new crown heteropolyanion K28Li5H7P8W48O184.92H2O: synthesis, structure, and propertiesRoland Contant and Andre TezeCite this: Inorg. Chem. 1985, 24, 26, 4610–4614Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 Dec…
Materials Science Effect of Filler Content and Size on Properties of Composites
Two series of dental composites, along with the unfilled resin matrix, were examined to determine the effects of filler level and size on selected properties. Both series were prepared by incorporating a silanated barium borosilicate filler into a visible-light-activated polyphenylene polymethacrylate resin matrix. On…
Induction of peptide conformation at apolar water interfaces. 1. A study with model peptides of defined hydrophobic periodicity
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInduction of peptide conformation at apolar water interfaces. 1. A study with model peptides of defined hydrophobic periodicityW. F. DeGrado and J. D. LearCite this: J. Am. Chem. Soc. 1985, 107, 25, 7684–7689Publication Date (Print):December 1, 1985Publication History Publis…
Mechanism of the chromium-catalyzed epoxidation of olefins. Role of oxochromium(V) cations
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the chromium-catalyzed epoxidation of olefins. Role of oxochromium(V) cationsE. G. Samsel, K. Srinivasan, and Jay K. KochiCite this: J. Am. Chem. Soc. 1985, 107, 25, 7606–7617Publication Date (Print):December 1, 1985Publication History Published online1 May 2002…
Toward an ab initio derivation of crystal morphology
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward an ab initio derivation of crystal morphologyZiva Berkovitch-YellinCite this: J. Am. Chem. Soc. 1985, 107, 26, 8239–8253Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.org/doi/10.…
Free radical generation by ultrasound in aqueous and nonaqueous solutions.
The physical principles underlying the oscillatory behavior of minute gas bubbles in liquids exposed to ultrasound are reviewed. Results from mathematical analyses suggest that these oscillations sometimes become unstable leading to transient cavitation in which a bubble violently collapses during a single acoustic ha…
Crystal and molecular structure of and magnetic coupling in two complexes containing gadolinium(III) and copper(II) ions
The tetradentate copper(I1) Schiff base complexes CuHAPen and CuSALen react with Gd(C10)4)3 to yield crystalline materials of formula [(CUHAP~~)~G~(H~O)~](C~O,)(I~) .anZdC [U(HCAUPS~A~L ~~)~G~(H,O)~](C~O~)~.~CUSAL~~. 0.5CzH5N02 (II), respectively. Their crystal structures were determined through X-ray diffraction at r…
Rheology of Suspensions in Polymeric Liquids
This paper reviews the flow behavior of concentrated suspensions as may be of interest in the processing of composites and similar polymeric materials. Succinct synopses are arranged at the end of each section. In general, the state of the art is a good one: a small number of experiments on a new formulation frequentl…
Solution studies of cellulose in lithium chloride and N,N-dimethylacetamide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution studies of cellulose in lithium chloride and N,N-dimethylacetamideCharles L. McCormick, Peter A. Callais, and Brewer H. Hutchinson Jr.Cite this: Macromolecules 1985, 18, 12, 2394–2401Publication Date (Print):December 1, 1985Publication History Published online1 May…