O Complexo Migmatítico de Mindelo aflora na orla litoral a norte do Porto sendo composto por um conjunto de litologias diversas incluindo rochas metassedimentares, migmatíticas, graníticas e veios pegmatíticos. As relações de campo, petrografia, geoquímica e assinatura isotópica das diversas litologias permitem deduzir a sequência de processos anatéticos que resultaram na heterogeneidade litológica presente. A ...
Na orla litoral do norte de Portugal aflora uma faixa referida cartograficamente como “Complexo Granito-Migmatítico” inserida na formação Complexo Xisto-Grauváquico (CXG) [1]. Nesta faixa afloram litologias diversas, nomeadamente: i) rochas metassedimentares; ii) rochas migmatíticas; e, iii) rochas graníticas. O paleossoma metassedimentar apresenta foliação e bandado composicional marcado por bandas ricas em b...
Gamma irradiator facilities can be used in a wide range of applications such as biological and chemical researches, sterilization of medical devices and products. Dose mapping must be performed in these equipments in order to establish plant operational parameters, as dose uniformity, source utilization efficiency and maximum and minimum dose positions. The isodoses curves are measured using dosimeters or compu...
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...
A 42-year-old male complaining of thoracic spine pain was admitted to the hospital for evaluation. An X-ray and computer tomography of the thoracic spine showed spondylodiscitis of the L3 lumbar and L2-L3 intervertebral disk. The tuberculin skin test (PPD) was strongly positive. A radioscopy-guided fine needle aspirate of the affected area was cultured but did not reveal the cause of the disease. Two biopsy att...
Neste trabalho estudamos o espalhamento quântico de uma partícula por um potencial generalizado que engloba em si todas as formas de potenciais retangulares unidimensionais. Neste contexto nós calculamos as probabilidades de reflexão e transmissão de uma partícula incidente sobre este potencial generalizado e avaliamos os efeitos de sua assimetria na transmissão dessa partícula através dele para energias abaixo...
Extensive systematizations of theoretical and experimental nuclear densities and of optical potential strengths extracted from heavy-ion elastic scattering data analyses at low and intermediate energies are presented. The energy-dependence of the nuclear potential is accounted for within a model based on the nonlocal nature of the interaction. The systematics indicates that the heavy-ion nuclear potential can b...
A class of bound-state problems which represent the interaction between a system of N two-level atoms and an electromagnetic radiation via an m-photon process is studied, with m = 1; 2; 3;.... We also evaluate some nonlinear effects usually related with the polarisability of the medium and with the dependence on the intensity of the radiation field on the matter-radiation interaction. We obtain exact values for...
C-reactive protein (CRP) was measured by ELISA in the sera of 165 healthy blood donors and 125 normal children 1 to 14 years old. The serum levels of blood donors ranged from 0.05 to 57.6 mg/l with median and mean values of 1.8 mg/l and 4.86 mg/l, respectively. CRP levels ranged from 0.02 to 14.4 mg/l in the children's sera, the median being 0.45 mg/l and the mean 1.65 mg/l. No individual lacking CRP was detect...
Financiadores do RCAAP | |||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |