Encontrados 19 documentos, a visualizar página 1 de 2

Traumatic Brain Injury in Portugal: Trends in Hospital Admissions from 2000 to ...

Introduction: Traumatic brain injury has a considerable socio-economic impact, being a major cause of morbi-mortality, often with permanent disability. We sought to characterize health resource utilization of adult traumatic brain injury patients in Portugal between 2000 and 2010.Material and Methods: Retrospective study of medical records of adult patients with ICD9 diagnostic code of traumatic brain injury in...

Changes in zooplankton communities along a mercury contamination gradient in a ...

The main objective of this paper was to evaluate the impact of mercury on the zooplankton communities’ structure and functioning and their bioaccumulation patterns along a contamination gradient in a temperate coastal lagoon. Our results demonstrated that total abundance was not negatively affected by Hg contamination, since the most contaminated areas presented the highest values, being the copepod Acartia ton...

Uma visão prática sobre a obrigação de segurança e saúde no trabalho : da prote...

Dissertação de mestrado em Direito dos Contratos e da Empresa ; O estudo aqui apresentado tem por finalidade promover a análise e reflexão acerca do tema a segurança e saúde no trabalho, e dar a conhecer a evolução que se fez sentir desde a revolução industrial até aos nossos dias bem como os problemas que surgem em torno desta temática. Esta evolução deve-se, em grande parte, à intervenção do Estado, no proce...

Monomethylmercury behaviour in sediments collected from a mercury-contaminated ...

Surface sediments and sediment cores were collected in a mercury (Hg)- contaminated lagoon, namely Largo do Laranjo – Ria de Aveiro, Portugal and analysed in order to establish the monomethylmercury (MeHg) behaviour in this kind of environment. In surface sediments, this compound was only detected in one place (13.2 ng g-1 (dry weight)). In this site, it was determined one of the lowest redox potentials (22 mV)...

Alunos maiores de 23 anos : motivações para o ingresso no ensino Superior na UP

Uptake of Hg2+ from aqueous solutions by microporous titano- and zircono-silicates

Being mercury one of the most toxic heavy metals present in the environment, it is of major concern to develop cleanup technologies to remove it from wastewater and recover mercury polluted ecosystems. In this context, we study the potential of some microporous titanosilicates and zirconosilicates for taking up Hg2+ from aqueous solutions. These materials have unique chemical and physical properties, and here w...

The Influence of Diet on Mercury Intake by Little Tern Chicks

We assessed mercury levels in the feathers of little tern (Sternula albifrons) chicks from hatching to fledging and in their prey captured by adults in three main foraging habitats: lagoon, salinas, and adjacent sea. These data were used to model mercury concentration in chick feathers through food ingestion, in order to explore the effects that changes in diet would have on the mercury burden of chicks as they...

Mercury behaviour in the water column of an impacted coastal lagoon: Ria de Ave...

As mercury presents high toxicity and is of great concern when dealing with protection of human health, mercury pollution related issues are the main subject of this work. At first, two general themes are discussed, namely: I) Mercury: highlights of physicochemical and biogeochemical properties of interest and of the main natural and anthropogenic metal sources; and II) Biogeochemical cycling of mercury in the ...

Mercury cycling between the water column and surface sediments in a contaminate...

Mercury cycling in the water column and upper sediments of a contaminated area, the Largo do Laranjo, Aveiro (Portugal), was evaluated after determination of reactive and non-reactive mercury concentrations in the water column and pore waters of sediments, collected in several places of this bay. In the water column, reactive mercury concentrations varied between 10 and 37 pmol dm−3, the highest values being ob...

Accumulation versus remobilization of mercury in sediments of a contaminated la...

http://apps.isiknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=12&SID=V12mKh9k9n8jHN@CK7o&page=1&doc=2&colname=WOS ; This work discusses the extent of sediment mercury retention in the most contaminated sites in the lagoon, and its exportation to the water column as well as transfer to biogenic suspended particles and to sea bass (Dicentrarchus labrax). Therefore,the main question, with i...