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Electrochemical methods for speciation of trace elements in marine waters. Dyna...
Mota, A. M.; Pinheiro, J. P.; Simões Gonçalves, M. L.The contribution of electrochemical methods to the knowledge of dynamic speciation of toxic trace elements in marine waters is critically reviewed. Due to the importance of dynamic considerations in the interpretation of the electrochemical signal, the principles and recent developments of kinetic features in the interconversion of metal complex species will be presented. As dynamic electrochemical methods, onl...
Analysis of the activation mechanism of Pseudomonas stutzeri cytochrome c perox...
Sousa, P. M. Paes de; Rodrigues, D.; Timóteo, C. G.; Gonçalves, M. L. Simões; Pettigrew, G. W.; Moura, Isabel; Moura, José J. G.J Biol Inorg Chem (2011) 16:881–888 DOI 10.1007/s00775-011-0785-8
Improvement in soil and sorghum health following the application of polyacrylat...
Varennes, Amarilis de; Mourato, M.P.; Martins, L.L.; Cardoso, A.I.; Mota, A.M.; Pinto, A.P.; Gonçalves, M.L.; Guiwei, QuResearch Article ; Contamination of soils with cadmium (Cd) is a serious global issue due to its high mobility and toxicity. We investigated the application of insoluble polyacrylate polymers to improve soil and plant health. Sorghum was grown in a Cd-contaminated sandy soil. Polyacrylate polymers at 0.2% (w/w) were added to half of the soil. Control soil without plants was also included in the experiment. Gro...
Benefits of membrane electrodes in the electrochemistry of metalloproteins: med...
Sousa, P. M. Paes de; Pauleta, Sofia R.; Rodrigues, D.; Gonçalves, M. L. Simões; Pettigrew, G. W.; Moura, Isabel; Moura, José J. G.J Biol Inorg Chem. 2008 Jun;13(5):779-87. doi: 10.1007/s00775-008-0365-8 ; A comparative study of direct and mediated electrochemistry of metalloproteins in bulk and membrane-entrapped solutions is presented. This work reports the first electrochemical study of the electron transfer between a bacterial cytochrome c peroxidase and horse heart cytochrome c. The mediated catalysis of the peroxidase was analysed b...
Phytoremediation potential of tobacco and Brassica juncea exposed to Cd stress
Alves, S; Pinto, AP; De Varennes, A; Martins, LL; Mourato, M; Mota, A; Gonçalves, M.L.Cd is the fifth most toxic metal to vertebrates and the fourth most toxic metal to vascular plants. A plant suitable for phytoremediation should especially possess the following characteristics: 1) ability to accumulate metals preferably in the aboveground parts, 2) tolerance to metal accumulated, 3) fast growth and high biomass and 4) easy harvestability. Plants usually experience oxidative stress when they ar...
Mediated catalysis of Paracoccus pantotrophus cytochrome c peroxidase by P. pan...
Sousa, P. M. Paes de; Pauleta, Sofia R.; Gonçalves, M. L. Simões; Pettigrew, Graham W.; Moura, Isabel; Moura, José J. G.J Biol Inorg Chem (2007) 12:691–698 DOI 10.1007/s00775-007-0219-9 ; This work reports the direct electrochemistry of Paracoccus pantotrophus pseudoazurin and the mediated catalysis of cytochrome c peroxidase from the same organism. The voltammetric behaviour was examined at a gold membrane electrode, and the studies were performed in the presence of calcium to enable the peroxidase activation. A formal reducti...
Electrochemical studies on small electron transfer proteins using membrane elec...
Moura, José J. G.; Santos, M.M. Correia dos; Sousa, P.M. Paes de; Gonçalves, M.L. Simões; Krippahl, L.; Lojou, É.; Bianco, P.Journal of Electroanalytical Chemistry 541 (2003) 153-162 ; Membrane electrodes (ME) were constructed using gold, glassy carbon and pyrolytic graphite supports and a dialysis membrane, and used to study the electrochemical behavior of small size electron transfer proteins: monohemic cytochrome c522 from Pseudomonas nautica and cytochrome c533 as well as rubredoxin from Desulfovibrio vulgaris . Different electr...
Effect of a new pyrimidine derivative, 2-(4´-aminobenzenamine)-pyrimidine, isol...
Dias, Catarina; Paulo, M. A.; Gonçalves, M. L.Comunicação oral sob forma de Painel ; Autonoë madeirensis (Menezes) Speta is a Hyacinthaceae endemic from the Madeira Archipelago (Portugal). From its bulbs we isolated a new compound: 2-(4-aminobenzenamine)-pyrimidine [1]. As pyrimidines have important effects in smooth muscle contraction we investigated the effect of the ethanolic extract and the effect of compound [1] in the rat vas deferens contractility....
Prognostic factors in intraparenchymatous cerebral hemorrhages. An analysis of ...
Nunes, B; Serviço de Neurologia e Medicina Interna, Hospital S. Pedro, Vila Real.; Silva, M C; Gonçalves, M L; Guimarães, FWe studied 76 patients, with the diagnosis of spontaneous intracerebral haematoma confirmed by CT scan, admitted to the Internal Medicine Department of S. Pedro Hospital, Vila Real, from 1991 to 93. Neurologic examination, radiological characteristics, previous diseases, clinical evolution and treatment were analysed to select prognostic factors in relation to length of stay, functional status and mortality. Le...
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