Encontrados 55 documentos, a visualizar página 1 de 6

Cartografia geológica e geomorfológica estrutural da área metropolitana do Port...

Hydrogeology of hard-rocks in the Portuguese Iberian Massif : Porto urban area ...

An integrated multidisciplinary approach will be adopted in order to carry out a broad characterisation of the groundwater in the Porto urban area and Serra da Estrela mountain region (Iberian Massif, Northern and Central Portugal). Such an approach will contribute to improve groundwater management and protection, under the sustainability framework. Research will include the following main tasks: a) presentatio...

Geologia, geomorfologia e estratigrafia dos domínios estruturais de Carvoeiro -...

Relevos quartzíticos do domínio estrutural de Caldas de S. Jorge - Carvoeiro - ...

A new light into old gold

Urban geochemistry of lead in gardens, playgrounds and schoolyards of Lisbon, P...

To assess the impact of potentially harmful elements in soil/dust on the health of children that use urban recreational areas to play outdoors, an urban survey of Lisbon, the largest city in Portugal was carried out, collecting soils and dusts from public gardens, parks, playgrounds and schoolyards. An exposure and risk assessment study for the incidental soil/dust ingestion of lead was carried out based on U...

Geochemistry and mineralogy of Pliocene clay deposits from West Portugal : prov...

Continuous-flow precipitation of hydroxyapatite in ultrasonic microsystems

This paper describes the continuous-flow precipitation of hydroxyapatite Ca5(PO4)3OH (HAp) in two ultrasonic microreactors using diluted aqueous solutions of calcium and phosphate at 37 °C. Precipitation of HAp was first carried out in a tubular microreactor immersed in an ultrasonic bath, where single-phase (laminar) flow and segmented gas-liquid flow were both evaluated. The single-phase flow study was then c...

Continuous-flow precipitation of hydroxyapatite at 37 °C in a meso oscillatory ...

Continuous-flow precipitation of hydroxyapatite (HAp) was investigated in a meso oscillatory flow reactor (meso- OFR) and in a scaled-up meso-OFR, obtained by associating in series eight vertical meso-ORFs. Experiments were carried out under near-physiological conditions of temperature and pH, using fixed frequency ( f = 0.83 Hz) and amplitude (x0 = 4.5 mm), and varying the residence time from 0.4 to 6.7 min. I...

Hydrogeological study of A High Mountain Area (Serra da Estrela, Central Portug...

The results of a preliminary hydrogeological study of the river Zêzere catchment upstream of Manteigas (Serra da Estrela Natural Park, Central Portugal) are presented. In this mountain region, different types of groundwater and surface water (used in several economic activities) occur. The methodology adopted in this study emphasizes the way how Geology, Geomorphology, Geophysics, Geochemistry, Soil Science and...