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Primary treatment optimization of a fish canning wastewater from a Portuguese p...

A sequence with three stages was optimized as a primary treatment for wastewaters from a fish canning industry of northern Portugal. Sedimentation tests were assessed at different times. The removal of a high fraction (75%) of oil and grease (O&G) and of some (48%) total suspended solids (TSS) occurred after a settling time of 1.5h. Coagulant dosage and pH value were optimized in the coagulation/flocculation tr...

Anterior Biopercular Syndrome Caused by Unilateral Infarction

The anterior biopercular syndrome is characterized by facio-pharyngo-glosso-masticatory diplegia, with automatic dissociation of movements. It generally translates bilateral opercular lesion, often of vascular etiology. There are very few cases described with unilateral lesions. We present the case of a patient with a bilateral anterior opercular syndrome caused by unilateral infarction. ; A síndrome biopercul...

Metodologia multi-critério para análise da qualidade acústica em igrejas

Tese de mestrado integrado. Engenharia Civil (especialização em Construções). Faculdade de Engenharia. Universidade do Porto. 2008

Desenvolvimento de modelos de previsão a longo prazo de preços de mercado de el...

Tese de mestrado integrado. Engenharia Electrotécnica e de Computadores - Major Energia. Faculdade de Engenharia. Universidade do Porto. 2008

A acção do director de escola em contexto de avaliação externa : funções e deci...

Trabalho de Projecto de mestrado, Ciências da Educação (Administração Educacional), Universidade de Lisboa, Instituto de Educação, 2011 ; O presente “trabalho de projecto” abordou o modo como o director de um agrupamento de escolas do distrito de Lisboa, desenvolveu o seu trabalho tendo em conta os eixos de análise relativos aos papéis e funções, (e o modo como exerce a liderança) e a tomada de decisão. Import...

Decylacetate synthesis by enzyme catalysis in SC-CO2

The main purpose of this work was the study of long chain esters production, using decyl acetate as model compound, by enzymatic catalysis in supercritical media, with the aim of developing a sustainable, clean and efficient process as an alternative to the traditional chemical processes. The combination of a sustainable and clean technology, as biocatalysis, with a green/natural solvent, as supercritical CO2, ...

Decyl acetate synthesis by enzyme catalysis in sc-CO2

The synthesis of decyl acetate, from the transesterification of vinyl acetate with decanol, was studied in a high-pressure experimental set-up, equipped with a variable volume batch reactor, operating isothermally at 35 ºC and 100 bar, using CO2 in supercritical conditions as solvent, and Candida antarctica lipase B (CALB), immobilized on the macroporous resin Lewatit B (Novozym 435®), as catalyst. The enzymati...

Glass-Fibre Wood: The Composite Materials Used on The Reduction of Wood in the ...

Production of esters by biocatalysed transesterification in supercritical CO2 a...

The development of sustainable processes that use renewable raw materials and minimize chemical and energetic waste has attracted considerable attention and represents a great challenge to both academic researchers and industrial experts. The use of enzymes to catalyse chemical transformations can constitute a more sustainable alternative to some traditional chemical processes and more than 100 biotransformatio...

Effectiveness factor for immobilized biocatalysts: two substratestwo products r...

Immobilized enzymes are being increasingly used as biocatalysts in numerous processes to obtain high-value products for the pharmaceutical, flavour and fragrance industries (Gandhi et al., 2000). The major advantages of immobilization include the increase in enzyme stability, the possibility of enzyme reutilization and the easy separation of the biocatalysts from the reaction mixture. However, it is necessary t...