Encontrados 4 documentos, a visualizar página 1 de 1
Dosimetric effect by shallow air cavities in high energy electron beams
Zarza-Moreno, M.; Carreira, P.; Madureira, L.; Miras del Rio, H.; Salguero, F. J.; Leal, A.; Teixeira, Nuno; Jesus, A. P.; Mora, G.This study evaluates the dosimetric impact caused by an air cavity located at 2 mm depth from the top surface in a PMMA phantom irradiated by electron beams produced by a Siemens Primus linear accelerator. A systematic evaluation of the effect related to the cavity area and thickness as well as to the electron beam energy was performed by using Monte Carlo simulations (EGSnrc code), Pencil Beam algorithm and Ga...
Contaminação de água subterrânea por substâncias de limpeza da neve em estradas...
Carvalho, A.; Espinha Marques, J.; Marques, J.M.; Carreira, P.M.; Moura, R.; Guerner Dias, A.; Chaminé, H.I.; Rocha, F.; Saraiva, R.; Tavares, M.Num momento em que a gestão sustentável dos recursos hídricos se assume como uma das maiores preocupações à escala mundial, as regiões de montanha têm vindo a ser reconhecidas como Reservatórios de Água (PROGRAMA UNESCO IHP-VI). O facto de muitas destas áreas se localizarem a altitudes elevadas e serem recortadas por rodovias obriga a frequentes operações de limpeza de neve, especialmente no inverno. A aplicaçã...
Assessing the impacts of agriculture on groundwater quality using nitrogen isot...
Paralta, Eduardo; Fernandes, Rosa M.; Carreira, P.; Ribeiro, Luís F.This paper intends to present preliminary results of nitrogen isotope assessment and source identification and characterization of nitrate non-point pollution in the context of official publication of ''Gabbros of Beja'' Vulnerable Region (Portaria 1100/2004, 3 of September). Research is based on funding project ''Assessing the impacts of agriculture on groundwater quality using nitrogen isotopes'' in progress ...
Leishmania (Viannia) panamensis - induced cutaneous leishmaniasis in susceptibl...
Goto,H.; Rojas,J. I.; Sporrong,L.; Carreira,P. de; Sánchez,C.; Örn,A.We studied the susceptibility to Leishmania (Viannia) panamensis in strains of mice. The C57BL/6 strain was resistant and showed self-controlled lesion at the injected foot pad. The BALB/c and DBA/2J strains were susceptible and showed a foot swelling that started day 20 post-infection and progressed to a tumour-like lesion in later period of observation. The CBA/HJ strain was found to be of intermediary resist...
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