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Esculetin-based Organic Chromophores for Dye Sensitized Solar Cells

The development of efficient solar energy harvesting systems is one of the greatest scientific challenges today. Recently attention has been driven to alternative solar collecting devices based on an optical absorbing chromophore anchored to the semiconductor surface. Our previous work on coumarins demonstrated that this molecules can be easily tune to incorporate substituents that allow to increase the conjuga...

Biocompatibility of poly(lactic acid) with incorporated graphene-based materials

The incorporation of graphene-based materials has been shown to improve mechanical properties of poly(lactic acid) (PLA). In this work, PLA films and composite PLA films incorporating two graphene-based materials – graphene oxide (GO) and graphene nanoplatelets (GNP) – were prepared and characterized regarding not only biocompatibility, but also surface topography, chemistry and wettability. The presence of bot...

Distinct behavior between multi-antibiotic resistant escherichia coli strains t...

Adsorção com modulação da pressão : aplicação à separação do oxigénio do ar

Dissertação apresentada para obtenção do grau de Doutor, na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor Carlos Costa

Preliminary feasibility study for the use of an adsorption/bio-regeneration sys...

This work studies the feasibility of the use of a combined physical-biological remediation procedure for treatment of effluents contaminated with molinate, where the herbicide is removed through adsorption and biodegraded in a subsequent stage, with the regeneration of the adsorbent. In order to select the most adequate absorbent for molinate, different materials were tested, namely pine bark, activated carbon ...

An overview of portuguese chemical engineering undergraduate laboratories

The UNESCO’s World Declaration on Higher Education for the Twenty-First Century, Vision and Action (1998) states in its paragraph “Innovative educational approaches: critical thinking and creativity”: “[…] New pedagogical and didactical approaches should be accessible and promoted in order to facilitate the acquisition of skills, competencies and abilities for communication, creative and critical analysis, inde...