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Magnetic and transport properties of diluted granular multilayers

The magnetic and transport properties of Co80Fe20t /Al2O34 nm multilayers with low nominal thicknesses t=0.7 and 0.9 nm of Co80Fe20 granular layers are studied. Magnetic studies find a superparamagnetic state above the blocking temperature Tb of field-cooled/zero-field-cooled splitting that grows with t and decreases with H. The low-voltage Ohmic tunnel transport passes to non-Ohmic IV3/2 law for applied fields...

Fronteira Pliocénico-Plistocénico: estudo de caso nas formações detríticas do A...

Na região do Algarve, a sedimentação pós Miocénico foi quase exclusivamente detrítica e a escassez de horizontes cronológicos torna muito difícil posicionar a fronteira Neogénico-Quaternário (FNQ). Com base na magnetostratigrafia e na interpretação das fácies sedimentares, propõe-se no presente trabalho que seja considerada como FNQ a inversão de polaridade Gauss-Matuyama, uma vez que ocorre no seio de um siste...

Estudos sedimentares em dois estuários da costa oeste algarvia: relação cor-ferro

Os sedimentos estuarinos constituem valiosos registos das condições climáticas e ambientais regionais.

Total costs and benefits of biomass in selected regions of the European Union

The paper describes results of the BioCosts project in which a comprehensive analysis of the economic and environmental performance of the energy use of biomass was carried out for selected existing facilities throughout the European Union. It is demonstrated that the appropriately organized use of biofuels has significant environmental advantages compared to the use of fossil fuels. Mitigation of global warmin...

Parasite Genome Projects and the Trypanosoma cruzi Genome Initiative

Since the start of the human genome project, a great number of genome projects on other "model" organism have been initiated, some of them already completed. Several initiatives have also been started on parasite genomes, mainly through support from WHO/TDR, involving North-South and South-South collaborations, and great hopes are vested in that these initiatives will lead to new tools for disease control and p...

The Trypanosoma cruzi Genome Project: Nuclear Karyotype and Gene Mapping of Clo...

By using improved pulsed field gel electrophoresis conditions, the molecular karyotype of the reference clone CL Brener selected for Trypanosoma cruzi genome project was established. A total of 20 uniform chromosomal bands ranging in size from 0.45 to 3.5 Megabase pairs (Mbp) were resolved in a single run. The weighted sum of the chromosomal bands was approximately 87 Mbp. Chromoblots were hybridized with 39 di...