16 research outputs found
A comparative study of intense surface cyclones off the coasts of southeastern Brazil and Mozambique
Exposure to pyrethroids induces behavioral impairments, neurofibrillary tangles and tau pathology in Alzheimerâs type neurodegeneration in adult Wistar rats
A spatially explicit and temporally highly resolved analysis of variations in fog occurrence over Europe
Rainfall types over southern West Africa: Objective identification, climatology and synoptic environment
Southern West Africa (SWA) is characterised by a wide range of rainfall types, the relative importance of which have never been quantified on a regional level. Here, we use 16 years of threeâdimensional reflectivity data from the Tropical Rainfall Measuring MissionâPrecipitation Radar (TRMMâPR) to objectively distinguish between seven different rainfall types in three subregions of SWA.
Highly organized Mesoscale Convective System (MCS) events are the dominating rainâbearing systems in SWA. They tend to occur in highly sheared environments as a result of midâlevel northeasterlies ahead of a cyclonic vortex. Their contribution to annual rainfall decreases from 71% in the Soudanian to 56% in the coastal zone. MCSs in SWA also propagate slower than their Sahelian counterparts and occur predominantly at the start of the first coastal rainy season. However, in terms of numbers, about 90% of rainfall systems are weakly organized classes, particularly smallâsized, highly reflective and moderately deep (40 dBZ at altitude 9 h, whereas less intense rainfall types tend to be shortâlived, diurnal phenomena.
This novel approach stresses the relevance of midâlevel (wave) disturbances on the type and lifetime of convective systems and thereby their regionally, seasonally and diurnally varying contribution to rainfall amount. The present study suggests further investigations into the character of the disturbances as well as possible implications for operational forecasting and the understanding of rainfall variability in SWA
Percutaneous Isolated Liver Perfusion for Treatment of Hepatic Malignancy: Preliminary Report
Acidentes quĂmicos ampliados: um desafio para a saĂșde pĂșblica The increase in chemical accidents: a challenge for public health
Os acidentes envolvendo substĂąncias perigosas nas atividades de transporte, armazenamento e produção industrial de produtos quĂmicos constituem um sĂ©rio risco Ă saĂșde e ao meio ambiente. Objetiva-se discutir, no Ăąmbito da saĂșde pĂșblica, alguns dos desafios que esses tipos de acidentes colocam, principalmente para os paĂses de economia perifĂ©rica. AtravĂ©s da combinação de informaçÔes quantitativas e qualitativas, foram definidos e caracterizados esses tipos de acidentes e seus diversos riscos. Esses acidentes tĂȘm se apresentado com a maior gravidade nos paĂses de economia perifĂ©rica, embora a maioria deles venha ocorrendo sem o adequado registro de informaçÔes bĂĄsicas para a avaliação e vigilĂąncia, como Ă© demonstrado no caso do Rio de Janeiro (Brasil). AlĂ©m da tarefa de se avaliar as conseqĂŒĂȘncias de eventos, por vezes extremamente complexos, coloca-se tambĂ©m, a de formular estratĂ©gias de controle e prevenção em realidades sociais que configuram um terreno fĂ©rtil para a ocorrĂȘncia e agravamento dos mesmos.<br>Chemical accidents involving explosions, large fires and leakages of hazardous substances occuring during transport, storage and industrial production of chemicals constitute a real challeng to health, environmental and industrial safety professionals. The aim of this article is to discuss the main questions that this kind of accident provokes, in terms of public helth, particularly in developing countries such as Brazil. The paper defines and characterises these accidents and the various health risk they involve excluding the leakages of hazardous substances during "normal" production in industry - through the combination of quantitative and qualitative information drawn from the international literature on the subject. From some examples of chemical accidents such as occurred in Bophal (Ăndia), Vila SocĂł (Brazil), SĂŁo Paulo (MĂ©xico) and data of the World Health Organization (WHO), the authors seek to show that these events present a worsening, in terms of immediate deaths and injuries, in developing countries. The statistics of chemical accidents which occurred during the last ten years (1984 to 1993) in the State of Rio de Janeiro are used taken as a frame reference for the purpose of bringing to light the great number of occurrences made with no registration of basic information regarding assessment or surveillance. The complexity of causes and consequences, together with the structural problems of developing countries, present public health professionals and institutions, with some important tasks especially those os health risk assessment and the formulation of strategies to prevent and control future major chemical accidents