100 research outputs found

    Relevance, territory and time

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    Si algo define la obra de Barclay&Crousse diríamos que es la pertinencia. Esta afirmación podría ser el resultado de una primera mirada que se topa con la energía y la solidez que transmiten sus proyectos. Una energía firmemente unida al territorio y al clima, y una solidez profundamente anclada en la cultura y la tradición. Tras esa primera mirada, queda el análisis detenido de sus obras, sus dibujos, sus maquetas, para constatar tras él que su arquitectura es de todo menos arbitraria. Como si hubieran sido guiados por fuerzas ocultas nunca muy explícitas trabajan obstinadamente conectados con el contexto peruano; un contexto complejo tanto por sus condiciones geográficas como por sus condiciones socioeconómicas, que asumen y entienden con una actitud no enjuiciadora que les permite operar de forma consciente con las posibilidades reales de las que disponen.[EN] If something defines the work of Barclay&Crousse we would say that it is relevance. This statement could be the result of a first look at the energy and solidity that transmit their projects. Energy firmly linked to the territory and the climate, and solidity deeply anchored in culture and tradition. After that first look, there is the careful analysis of their works, their drawings, and their models, to confirm that behind them is an architecture that is anything but arbitrary. As if they had been guided by hidden forces that were never very explicit they work stubbornly connected with the Peruvian context; a complex context, both because of its geographical conditions and because of its socioeconomic conditions, which they assume and understand with a non-judgmental attitude that allows them to preform consciously with the real possibilities available to them.[ES] Si algo define la obra de Barclay&Crousse diríamos que es la pertinencia. Esta afirmación podría ser el resultado de una primera mirada que se topa con la energía y la solidez que transmiten sus proyectos. Una energía firmemente unida al territorio y al clima, y una solidez profundamente anclada en la cultura y la tradición. Tras esa primera mirada, queda el análisis detenido de sus obras, sus dibujos, sus maquetas, para constatar tras él que su arquitectura es de todo menos arbitraria. Como si hubieran sido guiados por fuerzas ocultas nunca muy explícitas trabajan obstinadamente conectados con el contexto peruano; un contexto complejo tanto por sus condiciones geográficas como por sus condiciones socioeconómicas, que asumen y entienden con una actitud no enjuiciadora que les permite operar de forma consciente con las posibilidades reales de las que disponen.Abalos-Ramos, A.; Llopis Fernández, P. (2019). La pertinencia, el territorio y el tiempo. EN BLANCO. Revista de Arquitectura. 11(26):5-9. https://doi.org/10.4995/eb.2019.11564SWORD591126Kahn, Louis I. "La forma y el diseño", en Louis I. Kahn. Escritos, conferencias y entrevistas, ed. Alessandra Latour (El Escorial: El Croquis editorial, 2003), 125.Vacchini,Livio. "Arquitectura, historia y rito", DPA Documents de projectes d' arquitectura no.23 (2007): 6.Venturi, Robert. "Diversidad, pertinencia y representación en el historicismo o Plus ça change". Arquitecturas bis 3 nº48, (1984): 26

    About… A conversation with Barclay & Crousse

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    [EN] About the difference Twenty years and 10,000 kilometers separate the construction of the museum Mairaux in France and the Paracas Musuem in Peru. As a starting point, this interview will be interesting to know in which context Barclay & Crousse began in France, and if a turning point existed motivating the current focus of their work in the Peruvian context. The reality of our country, that through constant crises, and the aspirations of finding ourselves with our European roots, we had just graduated when we arrived in Europe. Jean Pierre first studied in Milan, and then we both ended up in Paris, I was studying and Jean Pierre was working with Enrique Ciriani. Later, thanks to our partnership with Laurent and Emmanuelle Beaudouin.[ES] Acerca de la diferencia.20 años y 10.000 kilómetros separan la construcción del museo Malraux en Francia y la del museo Paracas en el Perú. Para empezar esta entrevista sería interesante conocer el contexto en el que Barclay & Crousse empezó en Francia, y si existió un punto de inflexión que motivara la focalización actual de vuestro trabajo en el contexto peruano.La realidad de nuestro país, que atraviesa constantes crisis, y la aspiración de encontrarnos con nuestras raíces europeas nos terminó llevando a Europa apenas graduados como arquitectos. Jean Pierre estuvo primero estudiando en Milán, y luego ambos terminamos en París, yo estudiando y Jean Pierre trabajando con Enrique Ciriani. Luego llegaron las oportunidades de hacer proyectos y abrir una oficina, gracias a nuestra asociación con Laurent y Emmanuelle Beaudouin.Abalos-Ramos, A.; Llopis Fernández, P. (2019). Acerca de… Conversación con Barclay & Crousse. EN BLANCO. Revista de Arquitectura. 11(26):10-13. https://doi.org/10.4995/eb.2019.11565SWORD1013112

    Xylan-binding xylanase Xyl30 from Streptomyces avermitilis: cloning, characterization, and overproduction in solid-state fermentation

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    A DNA fragment from the lignocellulolytic actinomycete Streptomyces avermitilis CECT 3339 was cloned using a DNA probe from the xylanase gene xysA of Streptomyces halstedii. The nucleotide sequence analysis revealed two potential ORFs, xyl30 and hd30, encoding a deduced multimodular F/10 xylanase with a binding domain and a secreted glycoxyl hydrolase, respectively. In Streptomyces lividans carrying the subcloned DNA fragment, two xylanase activity bands with estimated molecular masses of 42.8 and 35 kDa (named Xyl30 forms "h" and "l", respectively), were detected by zymograms and SDS-PAGE. The two xylanases had identical N-terminal sequences, suggesting that Xyl30 "l" derived from Xyl30 "h" by C-terminal processing in the culture supernatant. No transcripts of hd30 were detected by RT-PCR. Characterization of the partially purified Xyl30 "h" confirmed the presence of a modular endoxylanase containing a xylan-binding domain, which after processing in the culture supernatant loses the aforementioned domain and thus its capacity to bind xylan (Xyl30 "l"). Xyl30 "h" achieved maximal activity at pH 7.5 and 60 degrees C, retaining more than 50% of its activity from pH 3 to 9 and more than 40% after a 1-h incubation at 70 masculineC. Moreover, in the recombinant host strain up to 400 U xylanase/g medium (dry weight) was produced in solid-state fermentation (SSF) using cereal bran as substrate. The high production yields of this enzyme and its biochemical features make it a good candidate for use in industrial applications

    Effectiveness of post-fire soil erosion mitigation treatments: a systematic review and meta-analysis

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    Wildfires are known to be one of the main causes of soil erosion and land degradation, and their impacts on ecosystems and society are expected to increase in the future due to changes in climate and land use. It is therefore vital to mitigate the increased hydrological and erosive response after wildfires to maintain the sustainability of ecosystems and protect the values at risk downstream from the fire-affected areas. Soil erosion mitigation treatments have been widely applied after wildfires but assessment of their effectiveness has been limited to local and regional-scale studies, whose conclusions may depend heavily on site-specific conditions. To overcome this limitation, a meta-analysis approach was applied to investigations of post-wildfire soil erosion mitigation treatments published in peer-reviewed journals. A meta-analysis database was compiled that consisted of 53 and 222 pairs of treated/untreated observations on post-fire runoff and erosion, respectively, extracted from 34 publications indexed in Scopus. The overall effectiveness of mitigation treatments, expressed as the quantitative metric ‘effect size’, was determined for both the runoff and erosion observations, and further analyzed for four different types of treatments (cover-based, barriers, seeding, and chemical treatments). The erosion observations involving cover-based treatments were analyzed for differences in effectiveness between 3 different types of mulch materials (straw, wood-based, and hydromulch) as well as between different application rates of straw and wood materials. Finally, the erosion observations were also analyzed for the overall effectiveness of post-fire year, burn severity, rainfall amount and erosivity, and ground cover. The meta-analysis results show that all four types of treatments significantly reduced post-fire soil erosion, but that only the cover and barrier treatments significantly reduced post-fire runoff. From the three different cover treatments, straw and wood mulches were significantly more effective in mitigating erosion than hydromulch. In addition, the effectiveness of both straw and wood mulches depended on their application rates. Straw mulching was less effective at rates below than above 200 g m−2, while mulching with wood materials at high rates (1300 to 1750 g m−2) produced more variable outcomes than lower rates. Results also suggest that the overall effectiveness of the treatments was greatest shortly after fire, in severely burned sites, providing or promoting the development of ground cover over 70%, and that it increased with increasing rainfall erosivity. It can be concluded that, in overall terms, the application of the studied post-fire erosion mitigation treatments represented a better choice than doing nothing, especially in sites where erosion is high. However, the meta-analysis highlights under-representation of studies on this topic outside of the USA, Spain and Portugal. It was also observed that most of the studies were conducted at hillslope scale and tested mulching (namely straw, wood and hydromulch) and/or barriers, while larger scales and other treatments were scarcely addressed. Further efforts need to be made in testing, from field and modeling studies, combinations of existing and/or emerging erosion mitigation treatments to ensure that the most adequate measures are applied after fires.publishe

    Remontagem da arqueologia de Chihimi sei (Valle de Soto, Córdoba): Escavações no sítio Sara Olga 1

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    Se presentan los resultados de la primera excavación realizada en el sitio arqueológico Sara Olga 1, en noviembre de 2019, en la localidad de Soto, Córdoba, en el marco de un proyecto de investigación que apunta a analizar la temporalidad de las prácticas sociales pasadas, desde la escala de lo cotidiano y doméstico a la de los procesos sociales y ambientales de más larga duración. El sito corresponde a una ocupación precolonial de sociedades agroalfareras, donde se recuperaron principalmente materiales cerámicos y líticos, en diferentes unidades estratigráficas, cuyo detalle se presenta aquí.The results of the first excavation at the Sara Olga 1 archaeological site, in the town of Soto, Córdoba, are presented within the framework of a research project that aims to analyze the temporality of past social practices, from the scale of everyday life and domestic to that of longer-lasting social and environmental processes. The site corresponds to a pre-colonial occupation of agro-pottery societies, where mainly ceramic and lithic materials were recovered, in different stratigraphic units, the details of which are presented here.Os resultados da primeira escavação do sítio arqueológico Sara Olga 1, na localidade de Soto, Córdoba, são apresentados no âmbito de um projeto de investigação que visa analisar a temporalidade das práticas sociais passadas, à escala da vida quotidiana e doméstica aos de processos sociais e ambientais mais duradouros. O local corresponde a uma ocupação pré-colonial de sociedades agro-cerâmicas, onde foram recuperados principalmente materiais cerâmicos e líticos, em diferentes unidades estratigráficas, cujos detalhes são aqui apresentados.Fil: Laguens, Andres Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Abalos Luna, Marcos Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Cruz, Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Fernández, Mauro Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Mancini, Cristina Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Ochoa, Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Pesci, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Quintero Bonnin, Maria Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; Argentin
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