Introdução: Perdas de peso melhoram o controlo da tensão arterial em indivíduos hipertensos. As intervenções comportamentais para a perda de peso parecem ser menos eficazes nos imigrantes de origem africana (IOA). Os principais objetivos foram avaliar os efeitos no peso de uma intervenção alimentar em hipertensos nativos de origem portugueses (NOP) e IOA; identificar fatores de sucesso na perda de peso; avaliar...
© Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Portugal License. ; Introduction: Blood pressure is significantly improved with weight loss. Behavioral interventions for weight loss seem to be less successful in African immigrants. Our main aims were to assess the effect of a dietary and lifestyle intervention on weight among hypertensive Portuguese natives and immigrants and to identify success fact...
A ocorrência de ondas de calor, que se verifica com alguma frequência em Portugal Continental, tem um grande impacto em termos de mortalidade, sendo reconhecida como um problema de saúde pública. Desde 1999 que Portugal possui um sistema de vigilância de ondas de calor sistema de vigilância ícaro em funcionamento de Maio a Setembro. Este sistema mostrou toda a sua potencialidade com a ocorrência da onda de ...
As lesões não intencionais em ambiente doméstico/familiar em crianças constituem uma das principais causas de morte em vários países de todo o mundo, incluindo Portugal, evidenciando a necessidade de intervenção. O presente artigo visa conhecer os fatores de risco de lesão não intencional em ambiente doméstico/familiar em crianças até aos 4 anos, que se encontram descritos na literatura. A pesquisa foi realizad...
A new optical system with wavelengthencoding/time-spreading Optical Code Division Multiple Access (O-CDMA) is proposed. Using orthogonal polarizations we can have a simple encoding and decoding of two independent channels and achieve differential detection.The resulting system has a constant null decision threshold and therefore a superior performance when compared with a system with di...
All-optical wavelength conversion is one of the major research topics in the optical networks area..Problems due to electrical conversion can be easily eliminated, such as thermic noise; its transparency to the shape of the signal and to the bit rate, makes this type of conversion an attractive solution.The ‘Four Wave Mixing’(FWM) process is one of these allopticaltechniques. The...
The knowledge of the frequency and relative weight of mutation and recombination events in evolution is essential for understanding how microorganisms reach fitted phenotypes. Traditionally, these evolutionary parameters have been inferred by using data from multilocus sequence typing (MLST), which is known to have yielded conflicting results. In the near future, these estimations will certainly be performed by...
The prevalence of cytomegalovirus (CMV) infections ranges between 50% and 85% in adults in the United States, and its epidemiology varies in different regions of the world and between socioeconomic and age groups. In Portugal, no study has been carried out to date to determine the prevalence of CMV in the general population. Under the second National Serological Survey conducted in continental Portugal in 2001–...
Objectives - The objective of the study was to analyse the association between the presence of air conditioning in hospital wards and the intrahospital mortality during the 2003 heatwave, in mainland Portugal. Methods Historical cohort study design including all patients aged 45 or more who were hospitalised in the 7 days before the heatwave. The outcome was survival during the 18 days the heatwave lasted and...
Versão impressa: Hum Reprod. 2010 Oct;25(10):2647-54 ; Background: Successful gametogenesis requires the establishment of an appropriate epigenetic state in developing germ cells. Nevertheless, an association between abnormal spermatogenesis and epigenetic disturbances in germline-specific genes remains to be demonstrated. Methods: In this study, the DNA methylation pattern of the promoter CpG island (CGI) of ...
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