14 documents found, page 1 of 2
Legacy Mercury Re-emission and Subsurface Migration at Contaminated Sites Const...
Zhu, W; Li, ZG; Li, P; Sommar, J; Fu, XW; Feng, XB; Yu, B; Zhang, W; Reis, AT; Pereira, EThe re-emission and subsurface migration of legacy mercury (Hg) are not well understood due to limited knowledge of the driving processes. To investigate these processes at a decommissioned chlor-alkali plant, we used mercury stable isotopes and chemical speciation analysis. The isotopic composition of volatilized Hg(0) was lighter compared to the bulk total Hg (THg) pool in salt-sludge and adjacent surface soi...
Toxicity of zinc oxide nanoparticles: Cellular and behavioural effects
Fernández-Bertólez, N; Alba-González, A; Touzani, A; Ramos-Pan, L; Méndez, J; Reis, AT; Quelle-Regaldie, A; Sánchez, L; Folgueira, M; Laffon, BDue to their extensive use, the release of zinc oxide nanoparticles (ZnO NP) into the environment is increasing and may lead to unintended risk to both human health and ecosystems. Access of ZnO NP to the brain has been demonstrated, so their potential toxicity on the nervous system is a matter of particular concern. Although evaluation of ZnO NP toxicity has been reported in several previous studies, the speci...
Assessing the in vitro toxicity of airborne (nano)particles to the human respir...
Bessa, MJ; Brandão, F; Rosário, F; Moreira, L; Reis, AT; Valdiglesias, V; Laffon, B; Fraga, S; Teixeira, JPSeveral studies have been conducted to address the potential adverse health risks attributed to exposure to nanoscale materials. While in vivo studies are fundamental for identifying the relationship between dose and occurrence of adverse effects, in vitro model systems provide important information regarding the mechanism(s) of action at the molecular level. With a special focus on exposure to inhaled (nano)pa...
Editorial of Special Issue: The Toxicity of Nanomaterials and Legacy Contaminan...
Reis, AT; Costa, C; Fraga, Sn/a
Integrated Use of Bioaccumulation, Genotoxic, and Haematological Endpoints to A...
Mieiro, CL; Coelho, JP; Reis, AT; Castro, D; Figueira, P; Martinho, F; Pardal, MA; Pereira, E; Pacheco, M; Lopes, CBBiosorption successfully remediates saline water contaminated with legacy contaminants, but its effects on the health of marine organisms remain unclear. Therefore, our aim was to address this knowledge gap with data on the accumulation ability, as well as the cytogenetic and biochemical effects in turbot (Scophthalmus maximus). To this end, we exposed turbot for seven days to a mixture of remediated metals (Re...
Effects of Zinc Oxide Nanoparticle Exposure on Human Glial Cells and Zebrafish ...
Valdiglesias, V; Alba-González, A; Fernández-Bertólez, N; Touzani, A; Ramos-Pan, L; Reis, AT; Moreda-Piñeiro, J; Yáñez, J; Laffon, B; Folgueira, MZinc oxide nanoparticles (ZnO NPs) are among the most widely used nanomaterials. They have multiple applications in cosmetics, textiles, paints, electronics and, recently, also in biomedicine. This extensive use of ZnO NPs notably increases the probability that both humans and wildlife are subjected to undesirable effects. Despite being among the most studied NPs from a toxicological point of view, much remains...
In Vitro Hepatotoxic and Neurotoxic Effects of Titanium and Cerium Dioxide Nano...
Rosário, F; Costa, C; Lopes, CB; Estrada, AC; Tavares, DS; Pereira, E; Teixeira, JP; Reis, ATConsidering the increasing emergence of new contaminants, such as nanomaterials, mixing with legacy contaminants, including metal(loid)s, it becomes imperative to understand the toxic profile resulting from these interactions. This work aimed at assessing and comparing the individual and combined hepatotoxic and neurotoxic potential of titanium dioxide nanoparticles (TiO2 NPs 0.75–75 mg/L), cerium oxide nanopar...
Salivary Leucocytes as In Vitro Model to Evaluate Nanoparticle-Induced DNA Damage
Valdiglesias, V; Fernández-Bertólez, N; Lema-Arranz, C; Rodríguez-Fernández, R; Pásaro, E; Reis, AT; Teixeira, JP; Costa, C; Laffon, BMetal oxide nanoparticles (NPs) have a wide variety of applications in many consumer products and biomedical practices. As a result, human exposure to these nanomaterials is highly frequent, becoming an issue of concern to public health. Recently, human salivary leucocytes have been proposed as an adequate non-invasive alternative to peripheral blood leucocytes to evaluate genotoxicity in vitro. The present stu...
Urinary cotinine assessment of maternal smoking and environmental tobacco smoke...
Silva, AI; Camelo, A; Madureira, J; Reis, AT; Machado, AP; Teixeira, JP; Costa, CTobacco consumption and environmental tobacco smoke (ETS) exposure remains an important public health concern. Pregnant women require particular attention as active and passive smoking during pregnancy are associated with multiple adverse perinatal outcomes. This study aimed to biochemically validate self-reported smoking and ETS exposure status among pregnant women, to more precisely ascertain its association ...
A Single Digestion Procedure for Determination of Major, Trace, and Rare Earth ...
Carvalho, L; Reis, AT; Soares, E; Tavares, C; Monteiro, RJR; Figueira, P; Henriques, B; Vale, C; Pereira, EThe simultaneous determination of major, trace, and rare earth elements in sediments requires the development of specific procedures to prevent interferences. A single digestion method adapted from the EPA method 3051A is proposed for the quantification of 42 elements in sediments by inductively coupled plasma techniques associated with optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP-MS). A c...