14 documents found, page 1 of 2
Biological effects and bioaccumulation of gold in gilthead seabream (Sparus aur...
Barreto, A.; Dias, A. A.; Duarte, B.; Pinto, Edgar; Almeida, A.; Trindade, T.; Soares, A. M. V. M.; Hylland, K.; Loureiro, S.; Oliveira, M.The question of whether gold (Au) is more toxic as nanoparticles or in its ionic form remains unclear and controversial. The present work aimed to clarify the effects of 96 h exposure to 4, 80 and 1600 μg·L−1 of 7 nm gold nanoparticles (AuNPs) – (citrate coated (cAuNPs) or polyvinylpyrrolidone coated (PVP-AuNPs)) – and ionic Au (iAu) on gilthead seabream (Sparus aurata). Effects at different levels of biologica...
Effects of gold nanoparticles in gilthead seabream—A proteomic approach
Barreto, A.; Carvalho, A.; Campos, A.; Osório, H.; Pinto, Edgar; Almeida, A.; Trindade, T.; Soares, A. M. V. M.; Hylland, H.; Loureiro, S.; Oliveira, M.Despite the widespread use of nanoparticles (NPs), there are still major gaps of knowledge regarding the impact of nanomaterials in the environment and aquatic animals. The present work aimed to study the effects of 7 and 40 nm gold nanoparticles (AuNPs) – citrate and polyvinylpyrrolidone (PVP) coated – on the liver proteome of the estuarine/marine fish gilthead seabream (Sparus aurata). After 96 h, exposure to...
Effects of single and combined exposures of gold (nano versus ionic form) and g...
Barreto, A.; Carvalho, A.; Silva, D.; Pinto, E.; Almeida, A.; Paíga, P.; Correia-Sá, L.; Delerue-Matos, C.; Trindade, T.; Soares, A.M.V.M.; Hylland, K.In vitro methods have gained rising importance in ecotoxicology due to ethical concerns. The aim of this study was to assess the single and combined in vitro effects of gold, as nanoparticle (AuNPs) and ionic (Au+) form, and the pharmaceutical gemfibrozil (GEM). Sparus aurata liver organ culture was exposed to gold (4 to 7200 μg·L−1), GEM (1.5 to 15,000 μg·L−1) and combination 80 μg·L−1 gold +150 μg·L−1 GEM for...
Educação e cooperação: desafios de uma agenda global
Barreto, A.; Carvalho, C.; Santos, F.Este número temático da revista Cadernos de Estudos Africanos incide sobre Educação e Cooperação e pretende dar continuidade aos Congressos Cooperação e Educação que, de forma regular, desde 2010 têm sido organizados pelo Centro de Estudos Internacionais do ISCTE-IUL e o Instituto Politécnico de Leiria. O quarto congresso, que decorreu no ISCTE-IUL entre dias 8 e 9 de novembro de 2018, teve o apoio do Camões I....
Genotoxicity of gold nanoparticles in the gilthead seabream (Sparus aurata) aft...
Barreto, A.; Luis, L.G.; Pinto, E.; Almeida, A.; Paíga, Paula; H.M.L.M. Santos, Lúcia; Delerue-Matos, Cristina; Trindade, T.; Soares, A.M.V.M.Due to their diverse applications, gold nanoparticles (AuNPs) are expected to increase of in the environment, although few studies are available on their mode of action in aquatic organisms. The genotoxicity of AuNPs, alone or combined with the human pharmaceutical gemfibrozil (GEM), an environmental contaminant frequently detected in aquatic systems, including in marine ecosystems, was examined using gilthead ...
Effects and bioaccumulation of gold nanoparticles in the gilthead seabream (Spa...
Barreto, A.; Luis, L.G.; Pinto, E.; Almeida, A.; Paíga, Paula; Santos, Lúcia H.M.L.M.; Delerue-Matos, Cristina; Trindade, T.; Soares, A.M.V.M.Gold nanoparticles (AuNPs) are found in a wide range of applications and therefore expected to present increasing levels in the environment. There is however limited knowledge concerning the potential toxicity of AuNPs as well as their combined effects with other pollutants. Hence, the present study aimed to investigate the effects of AuNPs alone and combined with the pharmaceutical gemfibrozil (GEM) on differe...
What is the main processing factor influencing Staphylococcus species diversity...
Fraqueza, M.J.; Rocha, J.M.; Laranjo, M.; Potes, M.E.; Fialho, A.R.; Fernandes, M.J.; Fernandes, M.H.; Barreto, A.; Semedo-Lemsaddek, T.; Elias, M.The microbiota of traditional dry-cured sausages and industrial environment was assessed to characterize the diversity of coagulase-negative staphylococci (CNS), and establish potential relationships with hygiene level or technological characteristics. Eight processing units from South Portugal were audited according to a checklist of requirements. Environmental and products’ samples at different production sta...
Relations between theory of mind and academic school readiness: the moderating ...
Martins, C.; Barreto, A.; Baptista, J.; Osório, A.; Martins, E.; Verissimo, M.This study investigated the prospective relationship between preschoolers’ theory of mind (ToM) skills and academic school readiness, while exploring the possible moderator role played by child gender. The participants were 75 children who were assessed at two time points: when enrolled in the second preschool year (T1) and again 4 months before school entry (T2). The results showed an association between child...
A multibiomarker approach highlights effects induced by the human pharmaceutica...
Barreto, A.; Luis, L.G.; Paíga, Paula; Santos, L.H.M.L.M.; Delerue-Matos, Cristina; Soares, A.M.V.M.; Hylland, K.; Loureiro, S.; Oliveira, M.Lipid regulators are among the most prescribed human pharmaceuticals worldwide. Gemfibrozil, which belongs to this class of pharmaceuticals, is one of the most frequently encountered in the aquatic environment. However, there is limited information concerning the mechanisms involved in gemfibrozil effects to aquatic organisms, particularly to marine organisms. Based on this knowledge gap, the current study aime...
A multibiomarker approach highlights effects induced by the human pharmaceutica...
Barreto, A.; Luis, L. G.; Paíga, P.; Santos, L. H. M. L. M.; Delerue-Matos, C.; Soares, A. M. V. M.; Hylland, K; Loureiro, S.; Oliveira, MLipid regulators are among the most prescribed human pharmaceuticals worldwide. Gemfibrozil, which belongs to this class of pharmaceuticals, is one of the most frequently encountered in the aquatic environment. However, there is limited information concerning the mechanisms involved in gemfibrozil effects to aquatic organisms, particularly to marine organisms. Based on this knowledge gap, the current study aime...