Browsing by Issue Date, starting with "2013-08"
Now showing 1 - 10 of 12
Results Per Page
Sort Options
- Late-stage gold (Electrum) in the Lousal Mine, Iberian Pyrite Belt, PortugalPublication . de Oliveira, Daniel Pipa Soares; Rosa, Carlos J. P.; Guimarães, Fernanda; Matos, João Xavier; Rosa, Diogo; Pereira, Zélia; Frias, Vasco C. S.
- Soil geochemical survey in Panasqueira mine surroundings (Central Portugal) : mining, metal(loid)s and related environmental impactPublication . Candeias, Carla; Salgueiro, Ana Rita; Silva, Eduardo Ferreira da; Ávila, Paula Freire; Melo, Rita
- Testing the use of FDEM EM34 for disseminated chromite prospecting in Trás-os-Montes, PortugalPublication . Ramalho, Elsa; de Oliveira, Daniel Pipa Soares; Santana, Helena
- Elemental characterization of the airborne pollen surface using Electron Probe Microanalysis (EPMA)Publication . Duque, Laura; Guimarães, Fernanda; Ribeiro, Helena; Sousa, Raquel; Abreu, IldaRecent worldwide increase in pollinoses has been attributed to the synergy between pollen and pollutants. We used EPMA for the elemental characterization of the airborne pollen surface in order to find out what occurs to the wall of pollen grains when they are together with other atmospheric pollutants. Analyses were performed both to airborne pollen and to pollen that was collected from Acer spp., Platanus spp. and Pinus spp. trees. Airborne samples were assembled using a Hirst-type volumetric spore sampler set in the coastal city of Porto, Portugal. Airborne pollen samples showed major elemental differences when compared to the control pollen sample of the same species, namely in the amounts of Cl, Na and Mg, which very significantly increased on airborne samples, revealing an important influence of the ocean. Mineral dust also contributed to modify the pollen surface, by increasing Si contents on Acer spp. and Platanus spp. airborne pollen. Our results revealed consistent positive effects of the relative humidity and the precipitation in the increase of Cl, Na and Mg relative amounts on the pollen surface. This study shows that pollen grains have the ability to adsorb and/or absorb other materials, which may contribute to enhance pollen's harmful effects on people's health.
- Availability of trace elements in the abandoned Freixeda gold mine area, NE PortugalPublication . Costa, Maria do Rosário; Ávila, Paula Freire; Ferreira, Adelaide; Silva, Eduardo Ferreira da
- Earthquake mitigation in the Lisbon and Lower Tagus Valley area, PortugalPublication . Carvalho, João; Dias, Ruben Pereira; Pinto, Carlos C.; Cunha, Taigo A.; Leote, Jaime; Vilanova, Susana; Narciso, João; Borges, José Fernando; Ghose, Ranajit
- Earthquake mitigation in the Lisbon and Lower Tagus Valley area, PortugalPublication . Carvalho, João; Dias, Ruben Pereira; Pinto, Carlos C.; Cunha, Tiago A.; Leote, Jaime; Vilanova, Susana; Narciso, João; Borges, José Fernando; Ghose, Ranajit
- P-T evolution of Neoproterozoic and Ordovician metamorphic rocks in the Iberian Massif, Central PortugalPublication . Henriques, S.B.A.; Ribeiro, Maria Luísa; Neiva, A.M.R.; Dunning, G. R.; Tajcmanová, L.
- Occurrence of gold (electrum) in the Lousal mine, Iberian pyrite belt, PortugalPublication . de Oliveira, Daniel Pipa Soares; Rosa, Carlos J. P.; Guimarães, Fernanda; Matos, João Xavier; Pereira, Zélia; Frias, Vasco C. S.; Rosa, Diogo; Castelo-Branco, José Mário
- The gastropod statolith elemental composition by EPMAPublication . Oliveira, S. Galante; Marçal, R.; Guimarães, Fernanda; Machado, J.; Barroso, C. M.