36 documents found, page 1 of 4
Sources and distribution of organic matter and polycyclic aromatic hydrocarbons...
Mil-Homens, Mário; Gonçalves, Sofia; Cortés, Alejandro; van Drooge, Barend L.; Stigter, Henko de; Grimalt, Joan O.; Cordeiro, Lívia; Santos, Miguel M.Total organic carbon (Corg), total nitrogen (Ntot), Corg/Ntot, δ13Corg, δ15N, calcium carbonate (CaCO3), and grain size were analyzed in 70 surface samples and 19 short cores from the southwestern Portuguese shelf. Perylene and USEPA-16 PAHs were quantified in a subset of these samples. The findings suggest that organic matter derives from a mix of terrestrial and marine sources, outlined by Corg, Ntot, and iso...
Strategic design: application of RFID in dog waste bag dispensers for urban areas
Esteves, Mónica; Caetano, Miguel; Gomes, Carla; Almeida, Bruno de; Lima, Cláudia; Mendonça, RuiThis paper discusses a project that aims to contribute to the management of dog waste in urban areas, focussing on the development of an electronic bag dispenser for dog waste. The project was the result of a partnership between Vila Nova de Gaia City Council and the Master's in Industrial and Product Design at the University of Porto. The methodology included field research, analysing the state of the art, str...
Spatial distribution and temporal trends of butyltin compounds (TBT, DBT & MBT)...
Mil-Homens, Mário; Almeida, C. Marisa R.; Dias, Sofia; Soares, Warley; van Gaever, Piet; de Stigter, Henko; Santos, Miguel M.; Santana, AndréSpatial patterns and temporal trends of the butyltin compounds tributyltin (TBT), dibutyltin (DBT), and mon-obutyltin (MBT) were investigated in a set of sediment samples collected along the SW Portuguese continental shelf. This region did not reach the Good Environmental Status (GES) in accordance with the Marine Strategy Framework Directive (MSFD) during a first evaluation carried out in 2012. Overall, MBT an...
Cerium uptake, translocation and toxicity in the salt marsh halophyte Halimione...
Brito, Pedro; Martins-Dias, Susete; Azevedo, Olga M.; Caetano, Miguel; Caçador, Isabel; Ferreira, RenataHalimione portulacoides plants were exposed to dissolved cerium (Ce) in a hydroponic medium for five days. Ce accumulation in plants followed the metal's increase in the medium although with a very low translocation factor (TF < 0.01) between roots and shoots. Ce median concentrations in roots were 586, 988 and 1103 μg/g (dry wt.), while in shoots the median values reached 1.9, 3.5 and 10.0 μg/g (dry wt.), for ...
An artificial reef at the edge of the deep: An interdisciplinary case study
Ramos, Jorge; Tuaty-Guerra, Miriam; Almeida, Mariana; Raposo, Ana C.; Gaudêncio, Maria J.; Silva, Alexandra D.; Rodrigues, Nuno; Leandro, Sérgio M.Just nearby the largest submarine canyon in Europe – off the western coast of Portugal – is located the Nazaré artificial reef (NAR) deployed in 2010 and the first of its kind in this coast. NAR aimed to improve social and economic resilience of the local communities, mainly by creating a safer and closer area for fishing and to enhance commercially exploitable marine resources. The innovative part of this rese...
Differential tissue accumulation in the invasive Manila clam, Ruditapes philipp...
Figueiredo, Cátia; Grilo, Tiago F.; Lopes, Ana Rita; Lopes, Clara; Brito, Pedro; Caetano, Miguel; Raimundo, JoanaAmong the environmental emerging concern rare earth elements, lanthanum (La) is one of the most common and reactive. Lanthanum is widely used in numerous modern technologies and applications, and its intense usage results in increasing discharges into the environment, with potentially deleterious consequences to earthlings. Therefore, we exposed the important food resource and powerful monitoring tool Manila cl...
An artificial reef at the edge of the deep: An interdisciplinary case study
Ramos, Jorge; Tuaty-Guerra, Miriam; Almeida, Mariana; Raposo, Ana C.; Gaudêncio, Maria J.; Silva, Alexandra D.; Rodrigues, Nuno; Leandro, Sérgio M.Just nearby the largest submarine canyon in Europe - off the western coast of Portugal - is located the Nazare acute accent artificial reef (NAR) deployed in 2010 and the first of its kind in this coast. NAR aimed to improve social and economic resilience of the local communities, mainly by creating a safer and closer area for fishing and to enhance commercially exploitable marine resources. The innovative part...
Microplastics in wild fish from North East Atlantic Ocean and its potential for...
Barboza, Luís Gabriel A.; Lopes, Clara; Oliveira, Patrícia; Bessa, Filipa; Otero, Vanessa; Henriques, Bruno; Raimundo, Joana; Caetano, MiguelMicroplastics (MP) pollution has received increased attention over the last few years. However, while the number of studies documentating the ingestion of microplastics by fish has increased, fewer studies have addressed the toxicological effects derived from the ingestion of these small items in wild conditions. Here, MP contamination and effect biomarkers were investigated in three commercially important fish...
Estuários
Neto, João; Caçador, Isabel; Caetano, Miguel; Chaínho, Paula; Costa, Lino; Gonçalves, Ana; Pereira, Leonel; Pinto, Lígia; Ramos, Jaime; Seixas, SóniaOs estuários são corpos de água costeiros que se encontram na zona de confluência do rio com o mar, onde a salinidade se dilui gradualmente mas onde as oscilações ambientais diárias podem variar de forma bastante drástica. São áreas muito produtivas mas onde, por serem de transição entre aqueles ambientes aquáticos, apenas um número restrito de espécies bem adaptadas se consegue apresentar de forma numerosa. Sã...
Age-Dependent Impairment of Neurovascular and Neurometabolic Coupling in the Hi...
Lourenço, Cátia F.; Ledo, Ana; Caetano, Miguel; Barbosa, Rui M.; Laranjinha, JoãoNeurovascular and neurometabolic coupling are critical and complex processes underlying brain function. Perturbations in the regulation of these processes are, likely, early dysfunctional alterations in pathological brain aging and age-related neurodegeneration. Evidences support the role of nitric oxide (•NO) as a key messenger both in neurovascular coupling, by signaling from neurons to blood vessels, and in ...