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Influence of seismic activity on the atmospheric electric field in Lisbon (Port...
Silva, H.G.; Oliveira, M.M.; Serrano, C.; Bezzeghoud, M.; Reis, A.H.; Rosa, R.N.; Biagi, F.In the present study, we considered the influence of seismic activity on the atmospheric electric field recorded at Portela meteorological station (Lisbon, Portugal) for the period from 1955 to 1991. To this end, an exploratory method was developed, which involved the selection of events for which the distance from the atmospheric electrical field sensor to the earthquake epicenter is smaller than the preparati...
Physics of Seismo-electromagnetic Phenomena
Silva, Hugo Gonçalves; Bezzeghoud, Mourad; Borges, J.F.; Bento, C.; Moita, P.; Serrano, C.; Reis, A.H.; Rosa, R.N.; Tlemçani, M.; Biagi, P.F.The seismo-electromagnetic phenomena (SEMG) are integrated in a relatively recent research field that studies diverse phenomena such as: unusual seismo-electrical signals [1], abnormal ultra-low-frequency (ULF) seismo-electromagnetic emissions [2], very-low-frequency (VLF) and low-frequency (LF) radiobroadcast anomalies associated with ionosphere perturbations [3], variation of total electron content of the ion...
Electric transport in different granitic rocks
Silva, Hugo Gonçalves; Graça, M.P.F.; Monteiro, J.S.; Bezzeghoud, Mourad; Rosa, R.N.; Mendiratta, S.K.; Tlemçani, M.; Moita, P.Many studies are being done to understand acoustic to electromagnetic conversion in rocks, [1], mainly because of the so-called seismo-electromagnetic phenomena (SEMG). Nevertheless, to our knowledge, most of them disregard a preliminary analysis of the electrical transport occurring in these rocks. These are, in fact, crucial to understand any electromagnetic process occurring in the materials since they clari...
Atmospheric electrical field suppression in the time of the M =4.1 Sousel earth...
Silva, Hugo Gonçalves; Serrano, C.; Reis, A.H.; Bezzeghoud, Mourad; Rosa, R.N.; Borges, J.F.; Caldeira, B.; Tlemçani, M.In recent years different phenomena associated with seismic events have been referred in the literature. These include: unusual ultra-low-frequency electromagnetic emissions [1]; anomalies in very-low and low-frequencies radio transmissions [2]; variation of the ionosphere total electron content [3]; and anomalous levels of different geochemical elements (in particular radon) in the earthquake preparation zone ...
Electromagnetic and acoustic coupling during mechanical action in porous media ...
Silva, Hugo Gonçalves; Graça, M.P.F.; Monteiro, J.H.; Bezzeghoud, Mourad; Rosa, R.N.; Mendiratta, S.K.; Tlemçani, MouhaydineElectromagnetic and acoustic coupling (EAC) during mechanical action, was theoretically predicted to occur in porous media [1] and was recently validated experimentally [2]. In fact, the exchange of acoustic waves to electromagnetic emissions is commonly referred in the literature as seismo-electromagnetic phenomena and is engaging a large number of geophysical groups on its study [3]. The reason for this inte...
The IV International Conference on Oil and Gas Depletion
Araújo, A.; Bezzeghoud, M.; Collares-Pereira, M.; Reis, A.H.; Rosa, R.N.; Silva, A.M.The IV International Workshop on Oil and Gas Depletion, that is held at Gulbenkian Foundation in Lisbon on the 19th and 20th May, 2005, is the fourth annual meeting promoted by ASPO, the Association for the Study of Peak Oil and Gas, with the organizing support of Geophysics Centre of Évora. Previous meetings were held at the University of Uppsala in 2002, Institut Français du Pétrole, Paris in 2003, and Bundes...
Produção de micélio de Crinipellis perniciosa em quatro meios de cultura, visan...
Faleiro,Fábio G.; Niella,Givaldo R.; Cerqueira,Ana Rosa R.N.; Damaceno,Virgínia O.; Gomes,Luana M.C.; Faleiro,Alessandra S.G.A produção de massa micelial é o primeiro passo para obter amostras de DNA de qualidade e quantidade suficiente para análises moleculares. Neste trabalho, objetivou-se analisar a quantidade e a qualidade do DNA de Crinipellis perniciosa extraído a partir de massa micelial obtida em quatro meios de cultura. Foi avaliado o peso de micélio liofilizado produzido nos seguintes meios de cultura: 1. extrato de levedur...
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