6 documents found, page 1 of 1
Nanoparticle exposure and hazard in the ceramic industry: an overview of potent...
Bessa, M.J.; Brandão, Fátima; Viana, Mar; Gomes, João; Monfort, Eliseo; Cassee, Flemming R.; Fraga, Sónia; Teixeira, JoaoThe ceramic industry is an industrial sector of great impact in the global economy that has been benefiting from advances in materials and processing technologies. Ceramic manufacturing has a strong potential for airborne particle formation and emission, namely of ultrafine particles (UFP) and nanoparticles (NP), meaning that workers of those industries are at risk of potential exposure to these particles. At p...
Insights into the role of the physicochemical properties in the toxicity of SiO...
Brandão, M.F.P.; Bessa, M.J.; Costa, C.; Fraga, S.; Haase, A.; Teixeira, J.P.Silica nanoparticles (SiO2 NPs) are easily produced in different sizes and surface modifications enabling their use in several industrial and biomedical applications, which increases the risk of human exposure to these nanoparticles. Because the toxicological profile of nanoparticles is dependent upon their physicochemical properties, the aim of this study was to investigate the influence of the physicochemical...
Cytotoxic effects of hydro-ethanolic extracts from Coleostephus myconis (L.) rc...
Bessada, Silvia; Barreira, J.C.M.; Costa, C.; Bessa, M.J.; Teixeira, J.P.; Oliveira, M.B.P.P.The species Coleostephus myconis (L.) Rchb.f. is considered as being a harmful and persistent weed, with constant presence in abandoned farmland. Prevailing in the Portuguese flora, C. myconis belongs to the Asteraceae family, which is recognized for its global medicinal value and high antioxidant power, as described in different research works. Nevertheless, before considering incorporating this species in foo...
Cytotoxicity and antibacterial activity of polar extracts obtained from saffron...
Barreira, João; Costa, C.; Branquinho, R.; Rebelo, J.M.; Bessa, M.J.; Peixe, L.; Teixeira, J.P.; Oliveira, M.B.P.P.Saffron (Crocus sativus L.) flower comprises six purple tepals, three yellow stamens and a white filiform style ending in a stigma with three threads, which represents less than 10% (w/w) of the flower weight. However, the stigma is the dominant reason to farm/harvest saffron, since it represents the most valued spice (after being dried). Interesting large amounts of floral bio-residues are produced and wasted ...
In vitro toxicity of TiO2 nanoparticles immobilized on clay to human hepatic cells
Bessa, M.J.; Reinosa, J.J; Fernández, J.F.; Bañares, M.; Teixeira, J.P.; Costa, CObjective: Evaluate in vitro toxicity of TiO2 nanoparticles immobilized on clay (C-TiO2) in a hepatocellular carcinoma human cell line (HepG2) as well as of its single elements.
In vitro toxicity screening of silica-coated superparamagnetic iron oxide nanop...
Costa, Carla; Brandão, F.; Bessa, M.J.; Costa, S.; Valdiglesias, V.; Kiliç, G.; Fernández-Bertólez, N.; Pásaro, E.; Laffon, B.; Teixeira, João PauloNanotechnology industry is progressing with prospects of substantial benefits to economics and science. Superparamagnetic iron oxide nanoparticles (ION) have been showing excellent magnetic properties, biocompatibility and biodegradability, broadening their potential applications and importance in the biomedical field