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Differential responses of the antioxidant defence system and ultrastructure in ...

Queirós, Filipa; Rodrigues, José A.; Almeida, José M.; Almeida, Domingos P. F.; Fidalgo, Fernanda

Changes in lipid peroxidation and ion content and the possible involvement of the antioxidant system in salt tolerance at the cellular level was studied in a potato (Solanum tuberosum L.) callus line grown on 150 mM NaCl (salt-adapted) and in a non-adapted line exposed to 150 mM NaCl (salt-stressed). Salinity reduced the growth rate and increased lipid peroxidation in salt-stressed line, which remained unaltere...


Antioxidant properties and fruit quality during long-term storage of “rocha” pe...

Silva, Filipe J. P.; Gomes, Maria Helena; Fidalgo, Fernanda; Rodrigues, José A.; Almeida, Domingos P. F.

Free radical scavenging activity and the content of ascorbic acid and glutathione were investigated during long-term storage of the pear (Pyrus communis L. ‘Rocha’) fruit harvested at different maturity stages, stored in air or under controlled atmosphere and subjected to postharvest treatments with diphenylamine (DPA) and 1-methylcyclopropene (1-MCP). Harvest maturity had a significant effect on storage disord...


Effect of mixing mode on the behavior of an ASBBR with immobilized biomass in t...

Damasceno,L. H. S.; Rodrigues,José A. D.; Ratusznei,S. M.; Zaiat,M.; Foresti,E.

A hydrodynamic study of a mechanically stirred anaerobic sequencing batch biofilm reactor (ASBBR) containing immobilized biomass on polyurethane foam was performed with the aim to determine homogeneity of the reactor based on total mixing time. Turbine or helix propellers were used for stirring at rotor speeds of 100, 200, 300 and 500 rpm. Experimental values obtained were fitted to a Boltzmann sigmoid. Homogen...

Data: 2008   |   Origem: OASIS br

Square-wave adsorptive-stripping voltammetric detection in the quality control ...

Nouws, Henri P. A.; Delerue-Matos, Cristina; Barros, Aquiles A.; Rodrigues, José A.; Santos-Silva, Alice; Borges, Fernanda

Electroanalytical methods based on square-wave adsorptive-stripping voltammetry (SWAdSV) and flow-injection analysis with square-wave adsorptive-stripping voltammetric detection (FIA-SWAdSV) were developed for the determination of fluoxetine (FXT). The methods were based on the reduction of FXT at a mercury drop electrode at -1.2 V versus Ag/AgCl, in a phosphate buffer of pH 12.0, and on the possibility of accu...


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Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia