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Impact of an external electron acceptor on phosphorus mobility between water an...

The present work assessed the impact of an external electron acceptor on phosphorus fluxes between water-sediment interface. Microcosm experiments simulating a sediment microbial fuel cell (SMFC) were carried out and phosphorus was extracted by an optimized combination of three methods. Despite the low voltage recorded, ∼96 mV (SMFC with carbon paper anode) and ∼146 mV (SMFC with stainless steel scourer anode),...

Doença Hemolítica Perinatal — Caso Clínico

A doença hemolítica perinatal resulta da passagem placentária de anticorpos do tipo IgG contra antigénios eritrocitários fetais, dando origem a hemólise. A incompatibilidade Rh(D) é a responsável por cerca de 94% casos. As incompatibilidades por antigénios atípicos (anti-c, anti-Kell) apesar de raras, dão origem a quadros graves.Os autores apresentam um caso clínico de isoimunização anti-c num prematuro, I° fil...

Water resources management in southern Europe : clues for a research and innova...

European countries are facing increasing pressures on their water resources despite stringent regulations and systematic efforts on environmental protection. In this context, research and innovation play a strategic role reinforcing the efficiency of water policies. The present study provides a multilevel assessment of research and innovation practices in the field of water resource management in southern Europ...

Effect of low concentrations of synthetic surfactants on polycyclic aromatic hy...

The present study is focused on the effect of synthetic surfactants, at low concentration, on the kinetics of polycyclic aromatic hydrocarbons (PAH) biodegradation by Pseudomonas putida ATCC 17514 and addresses the specific issue of the effect of the surfactant on bacterial adhesion to PAH, which is believed to be an important mechanism for the uptake of hydrophobic compounds. For that purpose, three surfactant...

Células de combustível microbianas : um processo inovador para produção de ener...

A produção de energia constitui uma base essencial para o desenvolvimento humano. Neste quadro, a capacidade de determinados microrganismos oxidarem matéria orgânica e transferirem eletrões para um ânodo e, por essa via, permitirem a produção direta de eletricidade representa uma efetiva oportunidade tecnológica. Este novo processo, designado por célula de combustível microbiana, constitui uma abordagem de prod...

Poly (ɛ-caprolactone) as biofilm support and carbon source for groundwater deni...

Diagnóstico Pré-natal de Síndrome de Wolf-Hirschhorn: a propósito de um caso

Introdução: O Síndrome de Wolf-Hirschhorn é uma patologia originada por uma deleção da região terminal do braço curto do cromossoma 4. O tamanho da deleção pode ser variável levando a um espectro alargado de manifestações clínicas. Em diagnóstico pré-natal (DPN), as alterações fetais mais frequentes incluem atraso do crescimento intra-uterino, lábio leporino e/ou fenda do palato e anomalias cardíacas. A prevalê...

Influence of carrier concentration on the control of Galactomyces geotrichum bu...

The present work aims to evaluate a strategy to solve Galactomyces geotrichum bulking based on the incorporation of a biofilm carrier in activated sludge systems. For this study, four sequencing batch reactors (SBR) were operated without (SBR1) and with a carrier for biofilm growth (5% [SBR2], 10% [SBR3], and 20% [SBR4] of the reactor volume). As expected, G. geotrichum bulking was observed in the SBR operating...

Coagulant properties of Moringa oleifera protein preparations : application to ...

This work aimed to characterize the coagulant properties of protein preparations from Moringa oleifera seeds to remove humic acids from water. Three distinct preparations were assayed, namely extract (seeds homogenized with 0.15 M NaCl), fraction (extract precipitated with 60 % w/v ammonium sulphate) and cMoL (protein purified with guar gel column chromatography). The extract showed the highest coagulant activi...

Phosphorus removal from eutrophic waters with an aluminium hybrid nanocomposite

An excess of phosphorus (P) is the most common cause of eutrophication of freshwater bodies. Thus, it is imperative to reduce the concentration of P to prevent harmful algal blooms. Moreover, recovery of P has been gaining importance because its natural source will be exhausted in the near future. Therefore, the present work investigated the removal and recovery of phosphate from water using a newly developed h...