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Conductivity and Dielectric Breakdown of Heterogeneous Materials. Application of the Renormalization Group Approach

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Influence of a Small Additive of Oligomers on the Mechanical Properties of Carbon Fiber Composites

The Effect of Loading Parameters on Fatigue Behaviour of Injection Moulded Composite

A Property Degradation Model for Fibre Microbuckling Failure in Composite Laminates

Applicability of Different Laws of Mixture for Polystyrene- Alumina Composites as Heterogeneous Dielectrics

Waterproofing of porous carbonate rocks: Efficiency-controlling its properties

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…

Modelling of Non-Isothermal Crystallization of Polypropylene/Glass Fiber Composites

Carbonation of mortars of aluminous cement under various alkaline conditions

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…

Reinforcement of Polymer Alloys. Model Representation

Optimization of Composites Based on PET Fiber-Reinforced Thermoplastics

Concrete Durability. Influence of chloride ions concentrations in mixing water and dissolution

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…

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Low bandgap ladder polymers

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 spectra and ground state of the new low bandgap polymer poly(thienopyrazine)

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 CC stretching mode region. By changing the exciting laser line these modes exhibit a dispe…

Heterobifunctional Poly(ethylene oxide): Synthesis of .alpha.-Methoxy-.omega.-amino and .alpha.-Hydroxy-.omega.-amino PEOs with the Same Molecular Weights

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…

Molecular Cloning and Characterization of a cDNA for the α Subunit of a G Protein from Rice

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…

Carbon 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 Surface

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…

Effect of Stacking Faults on the X‐ray Diffraction Profiles of β‐SiC Powders

X‐ray diffraction patterns of β‐SiC (3C or the cubic polytype of SiC) powders often exhibit an additional peak at d = 0.266 nm, high background intensity around the (111) peak, and relative intensities for peaks which differ from those predicted from the crystal structure. Computer simulations were used to show that a…