Browsing by Author "Saraiva, Marina"
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- EuroFIR guidelines for assessment of methods of analysis: GAMAPublication . Castanheira, Isabel; Saraiva, Marina; Rego, Andreia; Ollilainen, VelimattiAnalytical methodology is a key factor in food composition databases and specific criteria, at the component level, is needed for comparison of analytical data from different sources. The aim of this work is to describe how EuroFIR guidelines for assessment of methods of analysis are created and made available to users. Comprehensive information for macronutrients, vitamins, minerals and trace elements addressing all aspects of analytical procedures was obtained from international standards, and scientific literature. Documentation was compiled in a confluence wiki format provided for each component: background information, description of reference methods of analysis and critical steps, available reference materials, proficiency testing schemes, other analytical methods and relevant references. The information for each nutrient was collated, edited and presented with hypertext links to additional pages where more detailed information can be accessed using full text searches. The wiki format is a useful tool for preparing information and disseminating to users.
- HERA - Environmental Risk Assessment of a contaminated estuarine environment: a case studyPublication . Martinho, Ana Paula; Rodrigo, Ana; Vicente, Ana; Machado, Ausenda; Dias, Carlos Matias; Guiomar, Carla Sofia; Gonçalves, Cátia; Paixão, Eleonora; Santos, Fernanda; Louro, Henriqueta; Pinhal, Hermínia; Mateus, Inês; Coelho, Inês; Lopes, Inês; Castanheira, Isabel; Antunes, Joana; Sacadura, Joana; Lavinha, João; Toro, Joaquim; Lobo, Jorge; Nunes, Luís; Quintas, Maria do Carmo; Costa, Maria Helena; Silva, Maria João; Saraiva, Marina; Diniz, Mário; Martins, Marta; Pinto, Miguel; Fernandes, Paula Vaz; Costa, Pedro M.; Caeiro, Sandra; Gueifão, Sandra; carreira, Sara; Silva, Susana Pereira; Neuparth, TeresaSado River estuary is located in the west coast of Portugal. Previous environmental studies identified industrial contamination, non-point anthropogenic sources and contamination coming from the river, all promoting accumulation of polluted sediments with known impacts on the ecological system. Surrounding human populations have intense economic fishery activities. Together with agriculture, estuary fishing products are available to local residents. Food usage previously characterized through ethnographic studies suggests exposure to estuarine products, farming products, and water in daily activities, as potential routes of contamination. It is well established that long term exposure to heavy metals are associated with renal and neurological diseases, most heavy metals are classified as carcinogenic and teratogenic.
- Local farming quality and food composition : The case of Carrasqueira Village, PortugalPublication . Castanheira, Isabel; Coelho, Inês; Gueifão, Sandra; Saraiva, Marina; Martinho, Ana Paula; Fernandes, Ana Paula; Caeiro, SandraThe Sado estuary, located in the West Coast of Portugal, is partially classified as a natural reserve, but is threatened by many sources of anthropogenic pressure and runoff from agriculture grounds, originating a moderately contaminated estuary in some hot-spot areas. The small fishermen community of the Carrasqueira Village is located on the south margin of the Sado Estuary where previous epidemiological studies confirmed several human exposure routes to Sado estuary contaminants namely trough occupation, water and food consumption. The aim of this work is to evaluate the contamination and mineral profile from local farming as an important food intake of the Carrasqueira community. Another population VNMF, established near a pristine estuary, (the Mira Estuary) was surveyed as reference. According to a food frequency questionnaire conducted in the exposure population, the most frequent vegetables are tomato, lettuce, cabbage and potatoes. Samples of these vegetables, as well as soil and water were collected from three backyards in each population and analysed by ICP-MS and ICP-OES . Contents in phosphorus, calcium, iron, magnesium, potassium, chromium, manganese, nickel, copper, zinc, arsenic, selenium, cadmium ,lead, were evaluated. The obtained results show that tomatoes and lettuces grown in Carrasqueira farms present the highest content of copper (676±6.45 µg.kg-1 and 255±3.62 µg.kg-1 respectively). Trace amounts of selenium were detected in vegetables from different farms (5-9 µg.kg-1). The highest amount of zinc was found in lettuce grown in Carrasqueira 2 (4604±30.74 µg.kg-1). The lowest content of strontium was found in lettuce grown in VNMF (559±21.38 µg.kg-1). In all analysed samples the observed values for cadmium and lead were below levels set by European legislation. The results show that nutritional quality of local farming vegetables near pollution sources should be accessed taking into account not only nutrients but also contaminants analysis for food safety.