Materials Literature
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A detailed study has been carried out to explain the influence of Pp^ in silicate phases and in industrial raw meals upon their mineralogical compositions. Some compositions in the lime rich portion of the CaO-SiO2-P2O5 system are studied using laboratory reactants. The results showed that the compositions lying in th…
The aim of this study is to establish which physical properties may be used, in a routine way, in order to know the efficacy rate of a treatment applied on a specific rocky substrate. Whit this purpose, two types of carbonated rocks, the limestone of Hontoria (Burgos) and the dolomite of Laspra (Asturias) have been ch…
The aim was to reproduce, in an accelerated way in the laboratory, the transformations of what is known as alkaline hydrolysis and observe the results on the properties of the system. To do this, mortars of aluminous cement were made up, a part of which underwent thermic treatment. They were then carbonated under vari…
The most aggressive situation which is responsible for most of the cases of steel reinforcement corrosion in concrete, takes place when chlorides are present in the environment. These chlorides destroy the passivating film of steel and promote the denominated pitting corrosion. In order to study the demonstrated corro…
Unique new ladder polymers consisting of condensed succession of six and five membered conjugated carbon rings have been made recently by Scherf and Müllen. Seven topological isomers of these polyindenoindenes are considered theoretically. The results are analyzed in terms of topological bandgaps and geometry relaxati…
Raman modes of the new processable polymer poly(2,3-alkyl-thieno[3,4-b]-pyrazine) with a bandgap of about 0.9 eV were measured and calculated. Raman spectroscopy revealed two strong lines at about 1520 cm−1 and 1560 cm−1 in the CC stretching mode region. By changing the exciting laser line these modes exhibit a dispe…
Well-defined alpha-methoxy-omega-amino and a alpha-hydroxy-omega-amino poly(ethylene oxide)s (PEOs) were obtained after chemical modifications of alpha-hydroxy-omega-allyl PEO which was synthesized by anionic polymerization of ethylene oxide (EO) with allyl alcoholate as initiator; molecular weights of the prepolymer…
We report the isolation of a cDNA for the alpha subunit of a G protein from rice (Oryza sativa L. cv. Nipponbare). The cDNA contained an open reading frame that encoded a protein of 380 amino acid residues with a mol wt of 44,204. We designated this polypeptide RGA1 (rice G protein alpha subunit 1). The amino acid seq…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon Monoxide Hydrogenation on the Ru(001) Surface at Low Temperature Using Gas-Phase Atomic Hydrogen: Spectroscopic Evidence for the Carbonyl Insertion Mechanism on a Transition Metal SurfaceWilliam J. Mitchell, Jun Xie, Thomas A. Jachimowski, and W. Henry WeinbergCite th…