Now showing items 1-10 of 45
Jarosite pseudomorph formation from arsenopyrite oxidation using Acidithiobacillus ferrooxidans
(Elsevier B.V., 2010-09-01)
In this work, the oxidizing action of a native strain type A. ferrooxidans on a sulphide containing a predominance of arsenopyrite and pyrite has been evaluated. Incubation of the A. ferrooxidans strain in flasks containing ...
Design of a LNA and a Gilbert Cell Mixer MMICs with a GaAs PHEMT technology
The design of a Gilbert Cell Mixer and a low noise amplifier (LNA), using GaAs PHEMT technology is presented. The compatibility is shown for co-integration of both block on the same chip, to form a high performance 1.9 GHz ...
Late Holocene hydrology inferred from lacustrine sediments of Laguna Cháltel (southeastern Argentina)
(Elsevier Science, 2014-07)
Hydrological changes that occurred during the last 4700 years have been reconstructed using multi-proxy analyses of sediment cores from the volcanic crater lake of Laguna Cháltel (50°S, 71°W). The chronology is based on ...
Dissociative Adsorption of H2 on PtRu Bimetallic Surfaces
(American Chemical Society, 2016-04)
We present a theoretical study of the dissociative adsorption of molecular hydrogen on PtRu bimetallic surfaces based on density functional theory (DFT) calculations. We focus on the reactivity of a pseudomorphic Pt monolayer ...
Dependence on the growth direction of the strain in AlGaSb alloys
High resolution x-ray diffraction profiles were obtained from AlxGa1-xSb layers grown on (001) and (111) GaSb substrates. The out of plane lattice parameter, was estimated directly from the symmetrical diffractions for ...
Phase separation suppression in InGaN epitaxial layers due to biaxial strain
(American Institute of Physics (AIP), 2002-02-04)
Phase separation suppression due to external biaxial strain is observed in InxGa1-xN alloy layers by Raman scattering spectroscopy. The effect is taking place in thin epitaxial layers pseudomorphically grown by molecular-beam ...