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Tartaric stabilization of a Reserve Ruby Port Wine by cold and electrodialysis ...

Cold stabilization is the most common wine operation for wine tartaric stabilization. This operation consists in cooling the wine at temperatures near the wine freezing point [1, 2], to induce potassium bitartrate crystals precipitation. However, this is a slow and costly operation. Electrodialysis is a process that allows the separation of anions and cations according to their electrical charge through a selec...

Metodologia de planeamento da expansão e tarifação do uso de redes de transport...

Dissertação apresentada para obtenção do grau de Doutor em Engenharia Electrotécnica e de Computadores, na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Professor Doutor João Paulo Tomé Saraiva

Desenvolvimento de um modelo linear de optimização para coordenar relés direcci...

Dissertação apresentada para obtenção do grau de Mestre em Engenharia Electrotécnica e de Computadores na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor João Paulo Tomé Saraiva

IL1 gene polymorphims and dental implant unsucess.[Poster]

IL1 gene polymorphims and dental implant unsucess.

Pharmacology and toxicology of diphenyl diselenide in several biological models

The pharmacology of synthetic organoselenium compounds indicates that they can be used as antioxidants, enzyme inhibitors, neuroprotectors, anti-tumor and anti-infectious agents, and immunomodulators. In this review, we focus on the effects of diphenyl diselenide (DPDS) in various biological model organisms. DPDS possesses antioxidant activity, confirmed in several in vitro and in vivo systems, and thus has a p...

Editorial: III Brazilian meeting on the selenium and tellurium chemistry

Genetic toxicity of three symmetrical diselenides in yeast

Diphenyl diselenide (DPDS) is an electrophilic reagent used in the synthesis of a variety of pharmacologically active organoselenium (OS) compounds. The aim of the present study was to investigate the mutagenic effects of three symmetrical derivatives from the prototype DPDS (p-chloride-phenyl-diselenide, p-methyl-phenyl-diselenide and p-methoxy-phenyl-diselenide) in yeast. In summary, the cellular effects of t...

Catalytic application of selenium and tellurium compounds as glutathione peroxi...

This review covers the past decade of intensive research on the design, synthesis and screening of organoselenides and tellurides as catalyst able to mimic the activity of the selenoenzyme glutathione peroxidase (GPx). This important enzyme forms part of the detoxification system in humans which deals with harmful peroxides and their byproducts formed during oxygen metabolism. Several strategies to enhance the ...

Transition metal oxide nanopowder and ionic liquid: an efficient system for the...

We have developed an efficient method for the synthesis of diorganyl selenides and β-seleno amines using Zn, catalytic amounts of ZnO nanopowder, as a catalyst and ionic liquid as a recyclable solvent. This ZnO/ionic liquid system shows high efficiency in catalyzing these transformations with the formation of the desired products in high yields.