Eduardo Oliveira
University of Porto
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Featured researches published by Eduardo Oliveira.
Clinical Biochemistry | 2008
António Ascensão; António Rebelo; Eduardo Oliveira; Franklim Marques; Laura Pereira; José Magalhães
BACKGROUND Exercise is a prone condition to enhanced oxidative stress and damage and the specific activity pattern of a soccer match may favour additional pro-oxidant redox alterations. To date, no studies have reported the impact of a soccer match on oxidative stress and muscle damage markers. AIM To analyse the effect of a competitive soccer match on plasma levels of oxidative stress and muscle damage markers, and to relate these findings with lower limb functional data. METHODS Blood samples, leg muscle strength, sprint ability and delayed-onset muscle soreness (DOMS) were obtained in 16 soccer players before, at 30 min, 24, 48 and 72 h after a soccer match. Plasma creatine kinase (CK), myoglobin (Mb), malondialdehyde (MDA), sulfhydryl (-SH) groups, total antioxidant status (TAS), uric acid (UA) and blood leukocyte counts were determined. RESULTS A soccer match elevated plasma Mb following 30 min and CK levels throughout the 72 h-recovery period. MDA increased throughout the recovery period and -SH decreased until 48 h post-match. TAS increased at 30 min and UA increased throughout the 72 h recovery. Blood neutrophils increased at 30 min whereas lymphocytes decreased and returned to baseline from 24 to 72 h. DOMS was higher than baseline until 72 h. Lower limb strength and sprint ability were lower than baseline until 72 h recovery. CONCLUSION The present data suggest that a soccer match increases the levels of oxidative stress and muscle damage throughout the 72 h-recovery period. The extent to which the redox alterations are associated with the recovery of muscle function should be further analysed.
international world wide web conferences | 2012
Matko Bošnjak; Eduardo Oliveira; José Martins; Eduarda Mendes Rodrigues; Luís Sarmento
Modern social network analysis relies on vast quantities of data to infer new knowledge about human relations and communication. In this paper we describe TwitterEcho, an open source Twitter crawler for supporting this kind of research, which is characterized by a modular distributed architecture. Our crawler enables researchers to continuously collect data from particular user communities, while respecting Twitters imposed limits. We present the core modules of the crawling server, some of which were specifically designed to focus the crawl on the Portuguese Twittosphere. Additional modules can be easily implemented, thus changing the focus to a different community. Our evaluation of the system shows high crawling performance and coverage.
British Journal of Sports Medicine | 2007
António Ascensão; Rita Ferreira; Franklim Marques; Eduardo Oliveira; Victor Azevedo; José Soares; José Magalhães
Aim: To analyse the effect of an off-road motocross heat on plasma levels of oxidative stress and damage, blood leucocyte counts and urine catecholamine concentration. Methods: Plasma contents of total, reduced and oxidised (GSSG) glutathione, %GSSG, malondialdehyde (MDA), protein carbonyl and sulphydryl groups, total antioxidant status (TAS), uric acid, and blood neutrophil and lymphocyte counts were evaluated in 10 male top-level riders before, immediately after (0 h) and 1 h after a simulated competitive motocross race. 24-h urine adrenaline, noradrenaline and dopamine concentrations were also measured. Results: The motocross heat resulted in an increase in plasma oxidative stress and damage (p<0.05). This was shown by a significant increase in %GSSG, TAS, MDA and carbonyls, and by a decrease in sulphydryl groups after the race. There was a significant increase in both plasma uric acid and urine catecholamine concentration after the race (p<0.05). Blood neutrophil counts increased at 0 and 1 h after exercise (p<0.05). Lymphocyte count increased from baseline to 0 h, although it decreased from baseline and 0 to 1 h after exercise (p<0.05). Conclusion: The data reinforce the marked metabolic and hormonal demands imposed by motocross, resulting in a condition of enhanced plasma oxidative stress and damage.
Separation and Purification Technology | 2008
Eduardo Oliveira; Carlos A. Grande; Alírio E. Rodrigues
European Journal of Applied Physiology | 2010
José Magalhães; António Rebelo; Eduardo Oliveira; João R Silva; Franklim Marques; António Ascensão
Chemical Engineering Science | 2010
Eduardo Oliveira; Carlos A. Grande; Alírio E. Rodrigues
Canadian Journal of Chemical Engineering | 2009
Eduardo Oliveira; Carlos A. Grande; AlÃrio E. Rodrigues
Energy Procedia | 2009
Carlos A. Grande; Rui P.P.L. Ribeiro; Eduardo Oliveira; Alírio E. Rodrigues
Chemical Engineering Science | 2011
Eduardo Oliveira; Carlos A. Grande; Alírio E. Rodrigues
Industrial & Engineering Chemistry Research | 2009
Filipe V. S. Lopes; Carlos A. Grande; Ana M. Ribeiro; Eduardo Oliveira; José M. Loureiro; Alírio E. Rodrigues