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...
Monte Carlo (MC) dose calculation algorithms have been widely used to verify the accuracy of intensity-modulated radiotherapy (IMRT) dose distributions computed by conventional algorithms due to the ability to precisely account for the effects of tissue inhomogeneities and multileaf collimator characteristics. Both algorithms present, however, a particular difference in terms of dose calculation and report. Whe...
2010
We analyzed the SLC4A1 gene in three Mexican patients with Hereditary Spherocytosis (HS). The promoter and all 20 exons were investigated through heteroduplex analysis and DNA sequencing. No DNA changes were detected in one of the three patients. Two well-known polymorphisms, Memphis I and the Diego-a blood group, were detected in another one. In the third, the HS phenotype could be explained by the novel 1885_...
Abstract At SW Iberia, the boundary between Iberian and South-Portuguese Terranes is traced by a suture recording the closure of Rheic and related oceans through N-NE subduction. The western segment of the suture comprises imbrications of Iberian Terrane Relative Autochthon (Neoproterozoic - Lower Palaeozoic) and Allochthonous Complexes. The Iberian Terrane Relative Autochthon is topped by Lower-Middle Devonian...
During the last three years geoscientists of various institutions have developed a project aiming the setup of a geoconservation strategy in Portugal (Brilha, 2009). One of the main goals of the project was the establishment of an inventory of the most important Portuguese geosites, under the scientific point of view. In a near future, national authorities will consider this inventory as a technical support for...
A existência de um inventário nacional de património geológico é fundamental para se poderem implementar estratégias de geoconservação. Este trabalho apresenta a metodologia usada no desenvolvimento do mais completo inventário de geossítios. realizado até ao momento em Portugal, assim como os principais resultados obtidos. O inventário vai integrar o Sistema de Informação do Património Natural e o Cadastro N...
Publicação institucional sobre curso de FreeBSD, cujo objetivo foi capacitar pessoal de TI para configurar os principais serviços de um servidor FreeBSD, atualizar manter, resolver problemas e recuperar o sistema em caso de desastre. ; 2009 ; Folder.
Amiodarone-induced thyroid dysfunction (AITD) is a common complication of amiodarone therapy and its prevalence varies according to iodine intake, subclinical thyroid disorders and the definition of AITD. There is no consensus about the frequency of screening for this condition. We evaluated 121 patients on chronic regular intake of amiodarone (mean intake = 248.5 ± 89 mg; duration of treatment = 5.3 ± 3.9 year...
O pavilhão Multiusos de Baião foi construído em 2004. O edifício é formado essen-cialmente por dois corpos. A cobertura do corpo de maior dimensão é de uma água, cuja estru-tura principal, em madeira lamelada colada, é constituída por vigas treliçadas do tipo barriga de peixe, madres de cobertura e elementos de contraventamento. Com a ocorrência de ventos fortes observaram-se levantamentos do revestimento da co...
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