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Ethoprophos fate on soil–water interface and effects on non-target terrestrial ...

The present study aimed to assess the environmental fate of the insecticide and nematicide ethoprophos in the soil–water interface following the pesticide application in simulated maize and potato crops under Mediterranean agricultural conditions, particularly of irrigation. Focus was given to the soil–water transfer pathways (leaching and runoff), to the pesticide transport in soil between pesticide applicatio...

Avaliação das Características da População de uma Unidade de Cuidados Intensivo...

A preocupação da sociedade com o direito de utilização e acesso a cuidados de saúde com qualidade torna a avaliação da «qualidade» num aspecto com crescente importância nos sistemas de saúde.O presente estudo pretendeu avaliar as características da população assistida na Unidade de Cuidados Intensivos Pediátricos do H. S. João (UCIP) durante um período de seis anos (1995-2000), bem como as taxas de mortalidade ...

Adolescentes e Preservativos

Objectivo: Averiguar os factores associados ao protelamento da vida sexual activa e ao uso de preservativos.Material e métodos: Questionário preenchido anonimamente por 332 alunos do Lycée Français Charles Lepierre.Para além de perguntas sobre dados sócio-demográficos, o questionário continha perguntas sobre eventuais factores associados ao proletamento da vida sexual activa e ao uso de preservativos.Os dados f...

Images in clinical medicine. Congenital duodenal obstruction and double-bubble ...

Sr and Nd isotope data for arc-related (meta) volcanics (SW Iberia)

In the southern sector of the Ossa-Morena Zone (Iberian Variscan Chain), along its boundaries with the Beja-Acebuches Ophiolite and the South-Portuguese Zone, Upper Palaeozoic igneous mafic and intermediate rocks, both intrusive and extrusive, are widely represented. The so-called Odivelas Unit (Andrade,1983), include (meta-) basalts and (meta-) andesites, which, according with previous studies, display low-K ...

Thyroid carcinoma in children and young adults: retrospective review of 19 cases

Introduction: Thyroid carcinoma is rare in children and young adults. Most of management guidelines are based in data from adult population. Several controversies remain regarding the aggressiveness of clinical presentation and therapeutic approach. Objective: To evaluate all differentiated thyroid carcinoma patients with less than 20 years-old at presentation reflecting the experience of our unit in relation t...

PHB-PEO electrospun fiber membranes containing chlorhexidine for drug delivery ...

Fiber meshes of poly(hydroxybutyrate) (PHB) and poly(hydroxybutyrate)/ poly(ethylene oxide) (PHB/PEO) with different concentrations of chlorhexidine (CHX) were prepared by electrospinning, for assessment as a polymer based drug delivery system. The electrospun fibers were characterized at morphological, molecular and mechanical levels. The bactericidal potential of PHB and PHB/PEO electrospun fibers with and wi...

Factors affecting the metal recovery yield during induction melting of aluminiu...

Machining operations of cast parts usually generate considerable amounts of waste in the form of chips (usually 3–5% of the casting weight). Traditionally, swarf is sold to scrapers and remelters, but this option is quite expensive because the selling price is roughly 30% of the acquisition price of the commercial 2nd melt raw material. For most aluminium foundries that incorporate machining operations in their...

Aluminium evaporation during ceramic crucible induction melting of titanium alu...

Melting TiAl based alloys in ceramic crucibles often leads to chemical contamination, alloy heterogeneity and non-metallic inclusions. The severity of such phenomena usually depends on the nature of crucible materials, the melting stock composition and the melting parameters, namely superheating time and temperature and melting pressure. Among the referred drawbacks, Al loss during melting is a critical aspect,...

Evaluation of functionally graded ceramic crucible for induction melting of TiA...

During the last years a very significant effort to develop a melting crucible for induction melting of Ti based alloys at competitive cost has been carried out by many researchers, where the authors are included. Results obtained so far have shown that no material accomplishes the melting crucibles two main demands: inertness facing titanium alloys and suitable/enough thermal-shock resistance. Until now, yttriu...