Arranque en negro : Auditoría técnica para la habilitación de instalaciones

Dentro del marco regulatorio eléctrico de Argentina, se han establecido mecanismos de formación de Islas Eléctricas, como último recurso para evitar el colapso del sistema Argentino de Interconexión (SADI) y/o del Sistema Eléctrico Patagónico Interconectado (SEPI). Asimismo, producido el colapso eléctrico de una región o de todo el sistema, la recomposición del sistema colapsado requiere contar con generadores que posean la característica de "Arranque en Negro". En este artículo se presentan los resultados de los trabajos de Auditoria Técnica realizados por el IITREE-LAT y requeridos por CAMMESA, contemplando inspecciones y pruebas para la habilitación de instalaciones de arranque en negro de una unidad turbogas TG02 de la Central Térmica Pluspetrol Norte, propiedad de Pluspetrol S.A., ubicada en la localidad de El Bracho , provincia de Tucumán.Instituto de Investigaciones Tecnológicas para Redes y Equipos Eléctricos (IITREE

Arranque en negro : Auditoría técnica para la habilitación de instalaciones

Dentro del marco regulatorio eléctrico de Argentina, se han establecido mecanismos de formación de Islas Eléctricas, como último recurso para evitar el colapso del sistema Argentino de Interconexión (SADI) y/o del Sistema Eléctrico Patagónico Interconectado (SEPI). Asimismo, producido el colapso eléctrico de una región o de todo el sistema, la recomposición del sistema colapsado requiere contar con generadores que posean la característica de "Arranque en Negro". En este artículo se presentan los resultados de los trabajos de Auditoria Técnica realizados por el IITREE-LAT y requeridos por CAMMESA, contemplando inspecciones y pruebas para la habilitación de instalaciones de arranque en negro de una unidad turbogas TG02 de la Central Térmica Pluspetrol Norte, propiedad de Pluspetrol S.A., ubicada en la localidad de El Bracho , provincia de Tucumán.Instituto de Investigaciones Tecnológicas para Redes y Equipos Eléctricos (IITREE

Time-intensity profile and relationship with consumer acceptability of processed cheese spread.

Abstract: Creamy “requeijão” is the commercially most prominent processed cheese spread in Brazil. The time intensity analysis is important to provide how the flavor behavior is for the consumers during the food ingestion and is used in order to obtain the temporal profile of an attribute in a certain product. In the present study, three different commercial brands, leaders in the market, in their traditional and light versions, were subjected to sensory and instrumental evaluations. Time-intensity analyses and acceptance tests were carried out. After the statistical evaluation, applying ANOVA, the Tukey test (p. 0.05), Partial Least Square (PLS), it was concluded that the consumers preferred products with a more intense cheese flavor and higher adhesiveness, besides expressing a greater acceptance and purchase intention for the product in its traditional version

What traits are carried on mobile genetic elements, and why?

Although similar to any other organism, prokaryotes can transfer genes vertically from mother cell to daughter cell, they can also exchange certain genes horizontally. Genes can move within and between genomes at fast rates because of mobile genetic elements (MGEs). Although mobile elements are fundamentally self-interested entities, and thus replicate for their own gain, they frequently carry genes beneficial for their hosts and/or the neighbours of their hosts. Many genes that are carried by mobile elements code for traits that are expressed outside of the cell. Such traits are involved in bacterial sociality, such as the production of public goods, which benefit a cell's neighbours, or the production of bacteriocins, which harm a cell's neighbours. In this study we review the patterns that are emerging in the types of genes carried by mobile elements, and discuss the evolutionary and ecological conditions under which mobile elements evolve to carry their peculiar mix of parasitic, beneficial and cooperative genes

Autosomal dominant polycystic kidney disease with diffuse proliferative glomerulonephritis - an unusual association: a case report and review of the literature

<p>Abstract</p> <p>Introduction</p> <p>Autosomal dominant polycystic kidney disease is an inherited disorder that is characterized by the development and growth of cysts in the kidneys and other organs. Urinary protein excretion is usually less than 1 g/24 hours in autosomal dominant polycystic kidney disease, and an association of nephrotic syndrome with this condition is considered rare. There are only anecdotal case reports of autosomal dominant polycystic kidney disease associated with nephrotic syndrome, with focal segmental glomerulosclerosis being the most commonly reported histopathological diagnosis. Nephrotic-range proteinuria in the presence of autosomal dominant polycystic kidney disease, with or without an accompanying decline in renal function, should be investigated by open renal biopsy to exclude coexisting glomerular disease. To the best of our knowledge, this is the first case of autosomal dominant polycystic kidney disease with histologically proven diffuse proliferative glomerulonephritis presenting with nephrotic-range proteinuria. No other reports of this could be found in a global electronic search of the literature.</p> <p>Case presentation</p> <p>We report the case of a 35-year-old Indo-Aryan man with autosomal dominant polycystic kidney disease associated with nephrotic syndrome and a concomitant decline in his glomerular filtration rate. Open renal biopsy revealed diffuse proliferative glomerulonephritis. An accurate diagnosis enabled us to manage him conservatively with a successful outcome, without the use of corticosteroid which is the standard treatment and the drug most commonly used to treat nephrotic syndrome empirically.</p> <p>Conclusion</p> <p>Despite the reluctance of physicians to carry out a renal biopsy on patients with autosomal dominant polycystic kidney disease, our case supports the idea that renal biopsy is needed in patients with polycystic kidney disease with nephrotic-range proteinuria to make an accurate diagnosis. It also illustrates the importance of open renal biopsy in planning appropriate treatment for patients with autosomal dominant polycystic kidney disease with nephrotic-range proteinuria. The treatment for various histological subtypes leading to nephrotic syndrome is different, and in this modern era we should practice evidence-based medicine and should avoid empirical therapy with its associated adverse effects.</p

Qualidade do óleo obtido a partir de diferentes classificações de amêndoa de castanha-de-caju.

O óleo de amêndoa da castanha-de-caju (OACC) é um produto de grande interesse industrial, pois apresenta qualidade sensorial diferenciada e alto valor nutricional. Entretanto, para auxiliar na viabilização desse produto, é importante o uso de matéria-prima de menor valor comercial. Assim, é descrita neste trabalho a qualidade de óleos obtidos a partir de diferentes classificações de ACC, sendo elas: LW3 (inteira, tamanho 210); S3 (banda); B3 (batoque); P3 (pedaço grande); SSP3 (pedaço super pequeno); e X3 (xerém), sendo todas de terceira qualidade. As amêndoas foram caracterizadas com relação à composição centesimal (proteínas, lipídios, umidade, cinzas, carboidratos e fibras) e seguiram para o processamento por prensagem, para extração de seus óleos. Os produtos obtidos foram avaliados com relação ao índice de acidez, teor de peróxido e à coloração. De acordo com os resultados, foi possível obter OACC de qualidade adequada à legislação brasileira utilizando-se matéria-prima de menor valor comercial

Multi-host environments select for host-generalist conjugative plasmids

BACKGROUND: Conjugative plasmids play an important role in bacterial evolution by transferring ecologically important genes within and between species. A key limit on interspecific horizontal gene transfer is plasmid host range. Here, we experimentally test the effect of single and multi-host environments on the host-range evolution of a large conjugative mercury resistance plasmid, pQBR57. Specifically, pQBR57 was conjugated between strains of a single host species, either P. fluorescens or P. putida, or alternating between P. fluorescens and P. putida. Crucially, the bacterial hosts were not permitted to evolve allowing us to observe plasmid evolutionary responses in isolation. RESULTS: In all treatments plasmids evolved higher conjugation rates over time. Plasmids evolved in single-host environments adapted to their host bacterial species becoming less costly, but in the case of P. fluorescens-adapted plasmids, became costlier in P. putida, suggesting an evolutionary trade-off. When evolved in the multi-host environment plasmids adapted to P. fluorescens without a higher cost in P. putida. CONCLUSION: Whereas evolution in a single-host environment selected for host-specialist plasmids due to a fitness trade-off, this trade-off could be circumvented in the multi-host environment, leading to the evolution of host-generalist plasmids