Classificação de redes pedonais para pessoas com mobilidade reduzida

O presente trabalho analisa alguns dos factores que condicionam a mobilidade pedonal de uma parte da população, as pessoas com mobilidade reduzida. No âmbito da realidade portuguesa, o objectivo foi determinar se as características físicas de um determinado espaço urbano respeitam as exigências do Decreto-Lei 163/2006. Neste enquadramento, um modelo de avaliação do grau de conformidade dos espaços com as normas vigentes foi idealizado com o intuito de gerar uma classificação dos locais estudados. Este modelo estabelece a normalização dos valores levantados para os itens considerados e a sua agregação para a obtenção de um índice que exprime o grau de conformidade do espaço avaliado. O modelo foi integrado num SIG para permitir a representação dos resultados alcançados em mapas de classificação e aplicada a um caso de estudo na cidade de Braga, Portugal

Utilização do método LCA no projeto de edifícios sustentáveis

As emissões excessivas de poluentes e a elevada utilização de recursos naturais e de energia, associados ao sector da construção, são cada vez mais preocupantes. Por conseguinte, os impactes ambientais associados a este sector são elevados, mas apresentam elevado potencial em serem minorados. É o Projetista que, na fase de execução do projeto, determina quais os materiais a aplicar numa determinada obra. Dada a necessidade atual em se minimizar os impactes ambientais, o projetista terá de demonstrar, sob um ponto de vista da construção sustentável, alguma sensibilidade na escolha dos materiais a colocar em obra. Atualmente existem no mercado ferramentas que permitem comparar os materiais e as tecnologias construtivas existentes, classificando-as como soluções “melhores” ou “piores” para cada projeto. No entanto, a complexidade e morosidade do processo restringe o seu uso a especialistas. Este estudo pretende simplificar o processo de avaliação do ciclo de vida de uma construção, permitindo, aos projetistas a aplicação, mais rápida e simples, da metodologia LCA normalizada, de forma a suportar as decisões na hora de escolher a “melhor” solução a adotar numa construção. Para o efeito foi estudado o impacte ambiental de todas as soluções construtivas que constam no manual ITE 50 "Coeficientes de transmissão térmica de elementos da envolvente dos edifícios". Este manual apresenta os processos construtivos mais correntes em Portugal. Desta forma os projetista passarão a poder cruzar o desempenho térmico das soluções construtivas com os seus potenciais impactes ambientais, permitindo optar por soluções equivalentes do ponto de vista funcional, mas que apresentam melhor desempenho ambiental

Environmental LCA database for conventional portuguese building technologies

Nowadays there is an increasing concern with the high emissions of polluting gases, the high use of natural resources and energy related to construction sector. There are several environmental impacts in this sector that can be moderated. This paper presents a study that allows the designers to quickly and easily apply the Life-Cycle Assessment (LCA) method to projects and therefore to understand which solutions are the best in what regards to sustainable construction. To fulfill the abovementioned goals this work studies the environmental per-formance of building technologies covered by the ITE50 manual coefficients of heat transfer of the building envelope elements . This manual covers the majority of building technologies used in Portugal

Stimulate® na micropropagação da mandioca (Manihot esculenta Crantz).

A cultura de ápices caulinares, que consiste na utilização do meristema apical como explante de partida para a micropropagação de plantas livres de doenças, é a técnica de cultivo in vitro mais utilizada em mandioca. O processo de micropropagação pode ser influenciado por fatores externos, como temperatura, umidade relativa, fotoperíodo, intensidade luminosa, e fatores intrínsecos ao crescimento e desenvolvimento vegetativo, dependentes de fatores como genótipo, tipos e tamanhos de explantes, além das condições nutricionais do meio de cultivo e da aplicação de fitorreguladores

Diagnóstico da hepatite por vírus C em doadores de sangue brasileiros, usando a reação de transcrição reversa e a reação em cadeia da polimerase "nested": comparação com os ensaios imunoenzimáticos e imunoblot recombinante

Screening blood donations for anti-HCV antibodies and alanine aminotransferase (ALT) serum levels generally prevents the transmission of hepatitis C virus (HCV) by transfusion. The aim of the present study was to evaluate the efficiency of the enzyme immunoassay (EIA) screening policy in identifying potentially infectious blood donors capable to transmit hepatitis C through blood transfusion. We have used a reverse transcriptase (RT)-nested polymerase chain reaction (PCR) to investigate the presence of HCV-RNA in blood donors. The prevalence of HCV-RNA positive individuals was compared with the recombinant immunoblot assay (RIBA-2) results in order to assess the usefulness of both tests as confirmatory assays. Both tests results were also compared with the EIA-2 OD/C ratio (optical densities of the samples divided by the cut off value). ALT results were expressed as the ALT quotient (qALT), calculated dividing the ALT value of the samples by the maximum normal value (53UI/l) for the method. Donors (n=178) were divided into five groups according to their EIA anti-HCV status and qALT: group A (EIA >; or = 3, ALT; or = 3, ALT>;1), group C (1Na prevenção da transmissão de Hepatite por Vírus C (HCV) em transfusões de hemocomponentes, utiliza-se rotineiramente, como testes de triagem de doadores de sangue, ensaios que detectam anticorpos anti-HCV e dosagens da enzima alanina-aminotransferase (ALT). O presente estudo tem como objetivo principal avaliar a eficiência do ensaio imunoenzimático de segunda geração (EIA-2) como teste de triagem, na identificação de doadores de sangue potencialmente infectados, e portanto, capazes de transmitir hepatite C pelos hemocomponentes. Nós utilizamos o ensaio de transcrição reversa (RT) e a reação em cadeia da polimerase "nested" («nested PCR») para investigar a presença do RNA do vírus da hepatite C (HCV) em doadores de sangue. A prevalência do RNA-HCV em indivíduos positivos foi comparada com os resultados do ensaio complementar imunoblot recombinante de segunda geração (RIBA-2) com o intuito de avaliar a utilidade de ambos como testes confirmatórios. Estes dois testes também foram comparados com a razão DO/C (valores de densidade óptica das amostras dividida pelo valor de corte da reação) no EIA-2. Os resultados das dosagens da ALT foram expressos como uma razão unitária denominada qALT, que representa o cálculo do valor do ALT da amostra dividido pelo valor máximo considerado normal para o teste (53UI/L). Os doadores de sangue foram divididos em cinco grupos de acordo com os resultados do EIA-2 e o qALT: grupo A (EIA >; ou = 3, ALT; ou = 3, ALT>;1), grupo C (

Cadomian magmatism and metamorphism at the Ossa Morena/Central Iberian zone boundary, Iberian Massif, Central Portugal: Geochemistry and P–T constraints of the Sardoal Complex

ABSTRACT: A well preserved Cadomian basement is exposed in the Iberian Massif, Central Portugal, at the Ossa Morena/Central Iberian zone boundary, which allows the determination of reliable geochemical data. A sequence of Cadomian and Variscan magmatic and tectonometamorphic events has been already described for this area and are documented in other areas of the Avalonian-Cadomian orogen. However, the geochemical information concerning the Cadomian basement for this area is still limited. We present whole rock geochemical and oxygen isotopic information to characterize the igneous protoliths of the Sardoal Complex, located within the Tomar-Badajoz-Cordoba Shear Zone, and identify their tectonic setting. We use detailed petrography, mineral chemistry and P-T data to characterize the final Cadomian tectonometamorphic event. The Sardoal Complex contains orthogneiss and amphibolite units. The protoliths of the orthogneiss are calc-alkaline magmas of acid composition and peraluminous character that were generated in an active continental margin in three different stages (ca. 692 Ma, ca. 569 Ma and ca. 548 Ma). The most significant processes in their petrogenesis are the partial melting of old metasedimentary and meta-igneous crust at different crustal levels and the crystal fractionation of plagioclase, alkali feldspars, apatite, zircon and Fe-Ti oxides. The protoliths of the amphibolite, older than ca. 540 Ma, are tholeiitic and calc-alkaline magmas of basic composition that display N-,T- and E-MORB affinities. They were generated in an active continental margin. Crustal contamination and fractional crystallization of hornblende and diopside were involved in their petrogenesis. However, the fractional crystallization was not significant. The magmatic activity recorded in the Sardoal Complex indicates the existence of a long-lived continental arc (ca. 692-540 Ma) with coeval felsic and mafic magmatism. The final stage of the Cadomian metamorphism is usually represented in other areas of the Cadomian basement as a LP-HT metamorphic event. However, the P-T data obtained by thermodynamic modelling indicates medium pressure/high temperature conditions at ca. 540 Ma. These data suggest that the Sardoal Complex represents a deeper level of the exhumed Cadomian basement where the final stage of the Cadomian metamorphism was recorded.info:eu-repo/semantics/publishedVersio

Life-cycle assessment of lightweight textile membrane partition walls

This paper analyze the environmental, functional and economical performances of some conceptual lightweights textiles membranes partitions walls and to compare one of them with two technologies present in Portuguese market: i) the heavyweight conventional hollow brick partition wall; and ii) the lightweight reference plasterboard partition wall. Advantages of use textile/ fibrous/ membrane based materials in partition walls are focused and they may contribute for the development of new partition wall technologies. The comparative evaluation of these solutions is based on a standard Life-cycle Assessment method

Geochemistry of the Rio Espinharas hybrid complex, northeastern Brazil

The Rio Espinharas pluton, northeastern Brazil, belongs to the shoshonitic series and consists mainly of syenogranite, quartz-monzonite and porphyritic quartz-monzonite, but diorite, quartz-monzodiorite, quartz-syenite and microsyenogranite also occur containing microgranular enclaves, except for the diorite. Most variation diagrams of rocks, amphiboles, biotites and allanites show linear trends, but K, Zr, Sr and Ba of rocks display curved scattered trends. The rocks ranging from diorite to syenogranite define a pseudo-errorchron and have similar REE patterns. Syenogranite and microsyenogranite are derived from two distinct pulses of granite magma with initial 87Sr/86Sr ratio of 0.7083±0.0003 and 0.7104±0.0007, respectively. Modelling of major and trace elements shows that the syenogranite evolved by fractional crystallization of plagioclase, microcline, edenite, biotite and titanite, whereas quartz-monzonite, porphyritic quartz-monzonite, quartz-monzodiorite and quartz-syenite resulted from simple mixing between an upper mantle-derived dioritic magma and the upper crust-derived syenogranite magma. Dioritic enclaves are globules of a mafic magma from the upper mantle.http://www.sciencedirect.com/science/article/B6V6J-46X86NR-5/1/0e5ce1dcc0c8fe91ebd680e6f2ac523

Three-Port Laparoscopic Cholecystectomy in a Brazilian Amazon Woman with Situs Inversus Totalis: Surgical Approach

Situs inversus totalis (SIT) is an uncommon anomaly characterized by transposition of organs to the opposite side of the body in a mirror image of normal. We report on an adult woman, born and resident in Brazilian Amazonia, presenting acute pain located at the left hypochondrium and epigastrium. During clinical and radiological evaluation, the patient was found to have SIT and multiple stones cholelithiasis. Laparoscopic cholecystectomy was safely performed with the three-port technique in a reverse fashion. In conclusion, this case confirms that three-port laparoscopic cholecystectomy is a safe and feasible surgical approach to treat cholelithiasis even in rare and challenging conditions like SIT

Geochemistry and metamorphism of the Mouriscas Complex, Ossa-Morena/Central Iberian zone boundary, Iberian Massif, Central Portugal: Implications for the Cadomian and Variscan orogenies

ABSTRACT: The Mouriscas Complex is a deformed and metamorphosed predominantly mafic igneous complex of Ediacaran and Ordovician age and crops out at the Ossa-Morena/Central Iberian zone boundary in the Iberian Massif, Central Portugal. It comprises amphibolite with Neoproterozoic protoliths (ca. 544 Ma), protomylonitic felsic dykes derived from younger trondhjemitic protoliths (ca. 483 Ma) and garnet amphibolite derived of even younger dioritic protoliths (ca. 477 Ma). The protoliths of the Neoproterozoic amphibolites are calc-alkaline magmas of basic to intermediate compositions with intraplate and active continental margin affinities and are considered to represent the final phase of the Cadomian arc magmatism. They are interpreted to have originated as coarse-grained intrusions, likely gabbro or diorite and generated from the, partial melting of meta-igneous lower crust and mantle. Their emplacement occurred near the Cadomian metamorphic event dated at ca. 540 Ma (P = 7-8 kbar and T = 640-660 degrees C) which is interpreted to represent a continental collision. During the Late Cambrian-Early Ordovician an extensional episode occurred in the central-southern Iberian Massif and was also observed in other areas of the Variscan Orogen. It led to mantle upwelling and to the development of an aborted intracratonic rift located at the Ossa-Morena/Central Iberian zone boundary and to the opening of the Rheic Ocean to the south of the area studied in present coordinates (i.e., between the Ossa-Morena and South Portuguese Zones). This event has been dated at ca. 477 Ma and was responsible for the melting of deep ancient mafic crust and mantle with formation of bimodal magmatism in an intra-plate setting, as indicated by the protoliths of the protomylonitic felsic dykes with trondhjemitic composition and of the garnet amphibolite. Subsequent Variscan metamorphism took place under amphibolite facies conditions (P = 4-5.5 kbar; T = 600-625 degrees C) at lower P-T conditions than the Cadomian metamorphic event. It was followed by greenschist retrogression as suggested by the appearance of actinolite rims and formation of chlorite and epidote.info:eu-repo/semantics/publishedVersio