Tempo de retorno energético de isolantes térmicos na climatização de edificações : estudo de caso da lã de rocha na zona bioclimática 1 do Brasil

Orientador : Prof. Dr. Aloísio L. SchmidDissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Construção Civil. Defesa: Curitiba, 08/04/2014Inclui referênciasArea de concentração : Ambiente construído e gestãoResumo: A preocupação com o incremento da necessidade de energia no Brasil e no mundo tem sido uma constante. Parte dessa energia é de fontes não renováveis, agravando o problema a médio e longo prazo. A Europa já utiliza corriqueiramente isolantes térmicos no envelope das edificações visando reduzir o consumo de energia de aquecimento que representa cerca de 60% do consumo de energia durante o ciclo de vida construção. O trabalho teve como objetivo estudar o tempo de retorno energético da lã de rocha através da verificação do desempenho energético da residência padrão R1-N da ABNT (2006) que recebeu o nome de modelo (A). Foi feita a comparação com os modelos (B), (C) e (D). O modelo (B) teve acréscimo de revestimento de lã de rocha nas paredes do envelope, revestidas com gesso cartonado com pintura PVA. O modelo (C) recebeu acréscimo do mesmo revestimento, no teto do modelo (B). Já o modelo (D) teve as esquadrias padrão do modelo (C) substituídas por esquadrias de alumínio com vidro duplo preenchido com argônio Os dados permitem inferir que a aplicação da lã de rocha no envelope da edificação padrão R1-N mostrou-se viável em termos de tempo de retorno da energia adicional incorporada. Palavras-chave: lã de rocha, energia Incorporada, energia operacional, economia de energia, payback.Abstract: The concern with the increasing need for energy in Brazil and the world has been a constant. Some of that energy is not renewable, exacerbating the problem in the medium and long term. Europe already routinely used in thermal insulation of the building envelope to reduce energy consumption of heating which represents about 60% of energy consumption during the life cycle of construction. The work aimed to study the energy payback time of rockwool by verifying the energy performance of the standard residence R1-N ABNT (2006), which received the name of model (A). It was made a comparison with the models (B), (C) and (D). The model (B) had an increase of rock wool lining the walls of the envelope coated with plasterboard painted with PVA. The model (C) received the same extra coating on the roof of the model (B). The model (D) had windows of the standard model (C) replaced by aluminum frames with double glazing filled with argon The data allow us to conclude that the application of rock wool in the building envelope of the standard R1-N was feasible in terms of time to return the built-in additional energy. Keywords: Rockwool, embodied energy, operational energy, energy saving, payback

Used engine oil as alternate binder for buildings – a comparative study

At present, global warming and climate change are the major challenges of foremost significance that substantially influence the earth's environment. The construction sector, especially buildings, is one of the largest sources of greenhouse gas emissions. Conventional building materials such as clay bricks and cement are considered as environmentally unfriendly due to enormous emissions during their production. This paper investigates the utilisation of used engine oil (UEO) as an alternative to the usual cementitious binders. Prototypes were produced from UEO to optimise the compositions and conditions of the process and tested for compressive and flexural strength, permeability and water absorption, respectively, following the ASTM standards. Furthermore, environmental and weathering aspects were also demonstrated to ensure the feasibility of the product. Samples constituting 5% by weight UEO have shown significant results for flexural stress, compressive strength and water absorption and also passed the permeability test. Moreover, 5% of UEO samples have negligible effect in strength for accelerated weathering conditions as demonstrated by the ultraviolet test. Conclusively, UEO can be used as a replacement to conventional binding materials such as a clay bricks and cement. Sustainable development and waste management are the hallmarks of this research. </jats:p

Mashups: A Journey from Concepts and Models to the Quality of Applications

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Revalorization of wild: Asparagus stipularis Forssk. as a traditional vegetable with nutritional and functional properties

The nutritional values and phytochemical composition of young shoots of wild Asparagus stipularis Forssk. from Tunisia were determined in this study. The antioxidant (tested by four different in vitro assays) and antiproliferative properties (against human tumour cell lines) of aqueous and hydroalcoholic extracts of the young shoots were also investigated. The obtained results indicated that the young shoots are a potential source of valuable nutrients and dietary fiber, and their hydroalcoholic extract showed marked antioxidant and antiproliferative activities in all tested assays. The major phenolic compound, characterized by using a high-performance liquid chromatograph coupled with diode-array and mass spectrometer detectors, in both extracts was diferuloyl glycerol. Our results reinforce the interest in recovering the traditional culinary uses of this wild plant, with potential functional properties, which can be included in the modern diet as an alternative to the variety of vegetables normally used.Thanks are due to the ALIMNOVA research group (project UCM-252/2017), the Foundation for Science and Technology (FCT, Portugal) and the FEDER Program PT2020 for financial support to CIMO (UID/AGR/00690/2013) and R. Calhelha, and to A. Fernandes (SFRH/BPD/114753/2016), as well as to the Spanish MINECO for financial support to GIP-USAL (Project AGL2015-64522-C2-2-R).info:eu-repo/semantics/publishedVersio

Use of ticagrelor alongside fibrinolytic therapy in patients with ST-segment elevation myocardial infarction: Practical perspectives based on data from the TREAT study

All Clinical Cardiology articles are published under the terms of the Creative Commons Attribution License (CC BY) which allows users to copy, distribute and transmit an article, adapt the article and make commercial use of the article. The CC BY license permits commercial and non-commercial re-use of an open access article, as long as the author is properly attributed. Copyright on any research article published by a Wiley Open Access journal is retained by the author(s).Primary percutaneous coronary intervention (PCI) is the preferred reperfusion method in patients with ST‐segment elevation myocardial infarction (STEMI). In patients with STEMI who cannot undergo timely primary PCI, pharmacoinvasive treatment is recommended, comprising immediate fibrinolytic therapy with subsequent coronary angiography and rescue PCI if needed. Improving clinical outcomes following fibrinolysis remains of great importance for the many patients globally for whom rapid treatment with primary PCI is not possible. For patients with acute coronary syndrome who underwent primary PCI, the PLATO trial demonstrated superior efficacy of ticagrelor relative to clopidogrel. Results in the predefined subgroup of patients with STEMI were consistent with the overall PLATO trial. Patients who received fibrinolytic therapy in the 24 hours before randomization were excluded from PLATO, and there is thus a lack of data on the safety of using ticagrelor in conjunction with fibrinolytic therapy in the first 24 hours after STEMI. The TREAT study addresses this knowledge gap; patients with STEMI who had symptom onset within the previous 24 hours and had received fibrinolytic therapy (of whom 89.4% had also received clopidogrel) were randomized to treatment with ticagrelor or clopidogrel (median time between fibrinolysis and randomization: 11.5 hours). At 30 days, ticagrelor was found to be non‐inferior to clopidogrel for the primary safety outcome of Thrombolysis in Myocardial Infarction (TIMI)‐defined first major bleeding. Considering together the results of the PLATO and TREAT studies, initiating or switching to treatment with ticagrelor within the first 24 hours after STEMI in patients receiving fibrinolysis is reasonable

Síndrome do QT longo congênito: o que sabemos até o momento?

Síndrome do QT longo congênito é uma síndrome arrítmica hereditária caracterizada por prolongamento do intervalo QT no eletrocardiograma de 12 derivaçoes, torsades de pointes e maior chance de morte súbita cardíaca. A síndrome do QT longo congênito possui padrao autossômico dominante (síndrome de Romano-Ward), bem como padrao autossômico recessivo raro (síndrome de Jervell e Lange-Nielsen). Desde 1957, quando Jervell e Lange-Nielsen relataram os primeiros casos de síndrome do QT longo congênito familiar com surdez congênita, a compreensao dos mecanismos genéticos e eletrofisiológicos dessa afecçao melhorou significativamente os métodos diagnósticos e os tratamentos. No entanto, tornou-se evidente que a síndrome do QT longo congênito nem sempre pode ser explicada pela mutaçao de um único gene. Esta revisao teve por objetivo resumir as características da síndrome do QT longo congênito (principalmente LQT1, LQT2 e LQT3) e descrever brevemente os mais recentes avanços no diagnóstico clínico e no tratamento da afecçao

Síndrome de Timothy: relato de caso

Na síndrome de Timothy, caracterizada pela presença de QT longo (intervalo QT entre 480-700 ms) e de sindactilia cutânea e/ou óssea, além de outras manifestaçoes, a causa mais comum de morte é secundária a taquiarritmias. Relata-se o caso de paciente do sexo feminino, com 1 ano e 3 meses de idade, que evoluiu no segundo dia de vida com bradicardia e apneia de resoluçao espontânea. O eletrocardiograma evidenciou bloqueio atrioventricular de 2º grau e bradicardia, sendo submetida a implante de marcapasso epicárdico e posterior troca de cabo-eletrodo, evoluindo durante o procedimento com parada cardiorrespiratória em fibrilaçao ventricular, que foi revertida. Ao ser encaminhada para implante de cardiodesfibrilador em nosso serviço, cerca de 30 dias após o procedimento, apresentava febrícula esporádica, sem comprometimento do estado geral, e bom desenvolvimento pôndero-estatural e neuropsicomotor. Durante a internaçao, apresentou nova parada cardiorrespiratória em fibrilaçao ventricular, falecendo antes do procedimento

Síndrome de Timothy: relato de caso

Na síndrome de Timothy, caracterizada pela presença de QT longo (intervalo QT entre 480-700 ms) e de sindactilia cutânea e/ou óssea, além de outras manifestaçoes, a causa mais comum de morte é secundária a taquiarritmias. Relata-se o caso de paciente do sexo feminino, com 1 ano e 3 meses de idade, que evoluiu no segundo dia de vida com bradicardia e apneia de resoluçao espontânea. O eletrocardiograma evidenciou bloqueio atrioventricular de 2º grau e bradicardia, sendo submetida a implante de marcapasso epicárdico e posterior troca de cabo-eletrodo, evoluindo durante o procedimento com parada cardiorrespiratória em fibrilaçao ventricular, que foi revertida. Ao ser encaminhada para implante de cardiodesfibrilador em nosso serviço, cerca de 30 dias após o procedimento, apresentava febrícula esporádica, sem comprometimento do estado geral, e bom desenvolvimento pôndero-estatural e neuropsicomotor. Durante a internaçao, apresentou nova parada cardiorrespiratória em fibrilaçao ventricular, falecendo antes do procedimento