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School psychology in Portugal : practitioners??? characteristics and practices

Little empirical evidence is available on the professional characteristics and practices of school psychologists in Portugal. This study surveyed a total of 477 Portuguese school psychologists employed in public (80%) and private schools (20%). Portuguese school psychologists are described with regard to demographic, professional, and educational backgrounds, school settings, roles performed, and main target po...

Atribuições causais e nível educativo familiar na compreensão do desempenho esc...

Este artigo analisa o contributo específico do nível educativo familiar e das atribuições causais para o bom e fraco rendimento escolar dos alunos na explicação do seu desempenho nas disciplinas de Língua Portuguesa e de Matemática numa amostra de 2.082 alunos do ensino público de 11 escolas de Portugal, incluindo as Regiões Autónomas dos Açores e da Madeira. As atribuições causais foram avaliadas por meio do Q...

Sulfadiazine-potentiometric sensors for flow and batch determinations of sulfad...

New PVC membrane electrodes for the determination of sulfadiazine (SDZ) are presented. The electrodes are fabricated with conventional and tubular configurations with a graphite-based electrical contact, and no internal reference solution. The selective membranes consist of bis(triphenylphosphoranilidene)ammonium·SDZ (electrode A), tetraoctylammonium bromide (electrode B), or iron(II)-phthalocyanine (FePC) (ele...

Adesão ao tratamento da diabetes em adolescentes: ambiente terapêutico e factor...

Flow amperometric determination of carbofuran and fenobucarb

A simple, rapid, and precise amperometric method for quantification of N-methylcarbamate pesticides in water samples and phytopharmaceuticals is presented. Carbofuran and fenobucarb are the target analytes. The method is developed in flow conditions providing the anodic oxidation of phenolic-based compounds formed after alkaline hydrolysis. Optimization of instrumental and chemical variables is presented. Under...

Spectrophotometric flow system using vanadomolybdophosphate detection chemistry...

reactive phosphorus in water samples is described. The system includes a liquid waveguide long pathlength cell connected to a charge coupled device (CCD) spectrophotometer. Calibration was linear up to 500 µgPL−1, with a detection limit of 17 µgPL−1 and a quantification limit of 56 µgPL−1. An injection throughput of 60 determinations h−1 and repeatability (R.S.D.) of 2.2% were achieved. Potential interference f...

Biodegradation of p-chlorophenol by a microalgae consortium

An aquatic communitywas recovered from a waste discharge container fed with several aromatic pollutants. After 3 months of selective enrichment with p-chlorophenol and p-nitrophenol, two microalgae species, Chlorella vulgaris and Coenochloris pyrenoidosa, were recovered from the microbial consortium. As an axenic culture, this microalgae consortium was able to remove p-chlorophenol under different photo-regimes...

Biodegradation of p-nitrophenol by microalgae

A study was made on the use of a mixed microalgal consortium to degrade p-nitrophenol. The consortium was obtained from a microbial community in a waste container fed with the remains and by-products of medium culture containing substituted aromatic pollutants (nitrophenols, chlorophenols, fluorobenzene). After selective enrichment with p-nitrophenol (p-NP), followed by an antibiotic treatment, an axenic microa...

Obrigações e a estrutura por prazos da taxa de juro

O objectivo do presente trabalho consiste na análise dos aspectos essenciais relacionados com as obrigações e a estrutura por prazos da taxa de juros, dando ênfase ao seu estudo através de equações diferenciais. No ponto 1 serão abordados diversos conceitos relacionados com as obrigações e com a «Yeld curve». O ponto 2 é dedicado ao estudo do problema de valorização de uma obrigação no caso da taxa de juro ser ...

Tumores do Peritoneu: a propósito de dois casos de pseudomixoma peritoneal