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La durabilidad del hormigón y el medio ambiente
Factores que modifican la sulfatodurabilidad apreciada según el método de Koch Steinegger
La durabilidad del hormigón desde el punto de vista del constructor
Ingeniería del terreno (misión del consultor)
El binomio fabricante - usuario aporta próvida y refrendada experiencia en la problemática de la durabilidad
Coloquio: La penetrabilidad del hormigón al agua y a los iones agresivos, como factor determinante de su durabilidad
Participantes en las Primeras Jornadas de durabilidad del hormigón y el medio ambiente
Work function measurements on (100), (110) and (111) surfaces of aluminium
(100), (110) and (111) single crystal aluminium substrates were thoroughly outgassed by heating by electron bombardment in ultra high vacuum. Fresh single crystal surfaces were prepared by autoepitaxy on these substrates and the work functions of the surfaces were determined photoelectrically. The general effect of th…
JOINT COMMITTEE ON POWDER DIFFRACTION STANDARDS
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTJOINT COMMITTEE ON POWDER DIFFRACTION STANDARDSCite this: Anal. Chem. 1973, 45, 11, 944APublication Date (Print):September 1, 1973Publication History Published online24 May 2012Published inissue 1 September 1973https://doi.org/10.1021/ac60333a788RIGHTS & PERMISSIONSArticle V…
Generalized approach to multiphase dielectric mixture theory
A self-consistent solution for finding the complex dielectric constant of a multiphase mixture with confocal ellipsoidal shell inclusions is presented. Implicit in the solution are the first-order effects of neighboring inclusions, and hence, the high inclusion density limit is approached correctly. The solution conta…
Monte Carlo studies of the dielectric properties of water-like models
(1973). Monte Carlo studies of the dielectric properties of water-like models. Molecular Physics: Vol. 26, No. 3, pp. 789-792.
High stereo- and regioselectivities in the transition metal catalyzed epoxidations of olefinic alcohols by tert-butyl hydroperoxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh stereo- and regioselectivities in the transition metal catalyzed epoxidations of olefinic alcohols by tert-butyl hydroperoxideK. B. Sharpless and R. C. MichaelsonCite this: J. Am. Chem. Soc. 1973, 95, 18, 6136–6137Publication Date (Print):September 1, 1973Publication Hi…
Structural Studies of Polyethers, (-(CH2)m-O-)n. X. Crystal Structure of Poly(ethylene oxide)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Studies of Polyethers, (-(CH2)m-O-)n. X. Crystal Structure of Poly(ethylene oxide)Yasuhiro Takahashi and Hiroyuki TadokoroCite this: Macromolecules 1973, 6, 5, 672–675Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Published…
Solubilization of the Cytoplasmic Membrane of Escherichia coli by the Ionic Detergent Sodium-Lauryl Sarcosinate
The sensitivity of the outer and cytoplasmic membranes of Escherichia coli to detergent was examined by isopycnic sucrose density gradient centrifugation. Sodium lauryl sarcosinate (Sarkosyl) was found to disrupt the cytoplasmic membrane selectively under conditions in which Triton X-100 and dodecyl sodium sulfate sol…
Metal-insulator transitions
The valence and conduction bands in semi-conductors normally owe their properties to their crystal structures. Sometimes changes in pressure or composition in mixed crystals can lead to an overlap between these bands, which results in a transition to metallic behaviour. Repulsion between electrons can also lead to the…
Thermoelectric Power of Tetrathiofulvalinium Tetracyanoquinodimethane
Measurements of the thermopower of the organic conductor tetrathiofulvalinium tetracyanoquinodimethane have been made in the region 10-300\ifmmode^\circ\else\textdegree\fi{}K. At high temperatures ($T>140\ifmmode^\circ\else\textdegree\fi{}$K) the samples are metallic showing increased electron correlations as the t…
Distal Conformation of the Thyroid Hormone 3,5,3′-Triiodo-L-Thyronine
In the crystal structure of the thyroid hormone, 3,5,3'-triiodo-L-thyronine, the 3' iodine is observed in the distal position, away from the alaninebearing ring of the thyroid hormone. This result had been anticipated from stereochemical and biological activity studies. However, previous observations of structures in…
Tubular Packing of Spheres in Biological Fine Structure
The symmetrical arrangements of monomers into such cylindrical structures as microfilaments of actin, flagella of bacteria, microtubules of many organisms, and the protein coats of viruses can be specified by citing the index numbers of two or three sets of contact parastichies, or helical ranks of monomers, as has be…
Reversible Switching in Thin Amorphous Chalcogenide Films—Electronic Effects
Experimental results suggest that (1) switching in thin chalcogenide glass films is fundamentally electronic, and (2) the regime of pure electronic initiation has been exposed.Received 30 April 1973DOI:https://doi.org/10.1103/PhysRevLett.31.542©1973 American Physical Society