31 documents found, page 1 of 4

Protein profiling as early detection biomarkers for TiO2 nanoparticle toxicity ...

ABSTRACT: The mode of action for nanoparticle (NP) toxicity in aquatic organisms is not yet fully understood. In this work, a strategy other than toxicity testing was applied to Daphnia magna exposed to TiO2-NPs: the use of nuclear microscopy and the assessment of protein profile. D. magna is a keystone species broadly used as a model system in ecotoxicology. Titanium (Ti) was found in the D. magna digestive tr...

A multi-integrated approach on toxicity effects of engineered TiO2 nanoparticles

The new properties of engineered nanoparticles drive the need for new knowledge on the safety, fate, behavior and biologic effects of these particles on organisms and ecosystems. Titanium dioxide nanoparticles have been used extensively for a wide range of applications, e.g, self-cleaning surface coatings, solar cells, water treatment agents, topical sunscreens. Within this scenario increased environmental expo...

Incidência e Factores de Risco de Cicatriz Renal Após Primeiro Episódio de Piel...

Resumo Objectivo: Avaliar a incidência e os factores de risco de lesão renal após um primeiro episódio de pielonefrite aguda (PNA). Métodos: Foram analisados os processos clínicos de crianças seguidas na Consulta de Nefrologia Pediátrica de um Hospital de Nível III, após internamento por PNA entre Janeiro de 2000 e Dezembro de 2002. Foram excluídas as crianças com antecedentes de infecção urinária, uropatía pre...

Ecotoxicological evaluation of wastewater in a municipal WWTP in Lisbon area (P...

Wastewater management has a central role in sustainable development, and, in this context, an integrated management of wastewater treatment plants (WWTP) can be important. WWTP discharge complex effluents and for a new strategy in environmental protection ecotoxicological evaluation should complement the usual chemical evaluation. The EU project WW4Environment was set up for a WWTP located in Lisbon area and di...

Comparação dos efeitos de exposição a nanopartículas de TiO2 em duas espécies d...

Nuclear microscopy as a tool in TiO2 nanoparticles bioaccumulation studies in a...

Engineered Titanium nanoparticles are used for a wide range of applications from coatings, sunscreen cosmetic additives to solar cells or water treatment agents. Inevitably environmental exposure can be expected and data on the ecotoxicological evaluation of nanoparticles are still scarce.The potential effects of nanoparticles of titanium dioxide (TiO2) on two model organisms, the water flea, Daphnia magna and ...

Ecotoxicological evaluation of wastewater in a municipal WWTP in Lisbon area (P...

Wastewater management has a central role in sustainable development, and, in this context, an integrated management of wastewater treatment plants (WWTP) can be important. WWTP discharge complex effluents and for a new strategy in environmental protection ecotoxicological evaluation should complement the usual chemical evaluation. The EU project WW4Environment was set up for a WWTP located in Lisbon area and di...

NanoTiO2 e nanodiamante: aspectos relativos à caracterização e determinação da ...

Membrane-based treatment for tanning wastewaters 

Tanning wastewater was subjected to different unit operations to select the best treatment sequences. Textile membrane filtration (TMF), microfiltration (MF), and ultrafiltration (UF) were complemented by screening, flocculation or flotation operations. The general chemical characterization determined that the wastewater had a high organic load. The ecotoxicological study classified the wastewater as highly eco...

Alterações na actividade enzimática (GST e CAT) e histopatologia em Danio rerio...