78 research outputs found

    SOFC Sustainability Aspects

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    Respuesta de borraja ( Borago officinalis L.) a la fertilización con N, P, K, y S en el Centro Sur de Chile

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    Borage ( Borago officinalis L.) is an oilseed with a high gamma-linolenic acid (GLA) content in its seed. The objective of this study was to determine the response of borage seed yield, oil content, and fatty acid composition to N, P, K, and S fertilizer treatments. Three experiments were conducted in Osorno (40 o 22′S, 73 o 04′W; 72 m.a.s.l.), Chile. The first experiment was conducted during the 2005-2006 growing season, with four N rates (0, 100, 200, and 300 kg N ha -1 ), three P rates (0, 60, and 120 kg P 2 0 5 ha -1 ) and two K rates (0 and 150 kg K 2 0 ha -1 ). The second experiment was conducted in 2006-2007 and evaluated only the effect of four N rates (0, 50, 100 and 150 kg N ha -1 ) was evaluated because there was no response to P and K in the first experiment. The third experiment was conducted in the 2005-2006 and 2006-2007 and evaluated only two rates of S, 0 and 40 kg S ha -1 were evaluated. Seed yield was not affected by N, P, K, or their interactions in any of the experiments. As N rates increased GLA content increased. Mean seed yield increased to 98 kg ha -1 when appliying of 40 kg S ha -1 . Results indicate that borage has a higher response to S applications than N. Further research is needed to determine the interactions between N and S applications, given that the experiments were conducted on soils with high levels of P and K levels.La borraja ( Borago officinalis L.) es una oleaginosa con alto contenido de ácido gamma-linolénico (GLA) en su semilla. El objetivo de este estudio fue determinar la respuesta en rendimiento de semillas, contenido y composición del aceite de borraja, a la fertilización con N, P, K y S. Tres experimentos fueron conducidos en Osorno (40º22’ S, 73º04’ O; 72 m.s.n.m.), Chile. El primer experimento fue conducido en la temporada 2005-2006, con cuatro dosis de N (0, 100, 200 y 300 kg N ha-1 ), tres dosis de P (0, 60 y 120 kg P2O5 ha-1 ) y dos dosis de K (0 y 150 kg K2O ha-1 ). El segundo experimento fue conducido en el 2006-2007, cuando sólo se evaluaron cuatro dosis de N (0, 50, 100, y 150 kg N ha-1 ) ya que en la primera temporada no se observó respuesta a P y K. El tercer experimento se realizó en 2005-2006 y 2006-2007 y se evaluaron dos dosis de S, 0 y 40 kg S ha-1. El rendimiento de semillas no fue afectado por la dosis de N, P, K o la interacción entre ellos en ninguno de los experimentos. A medida que aumentó la dosis de N se observó un aumento en el contenido de GLA. La fertilización con 40 kg S ha-1 aumentó en promedio el rendimiento de semillas en 98 kg ha-1 . Los resultados indican que la borraja tiene una mejor respuesta a S que a N en las condiciones evaluadas de suelos con alto nivel de P y K; sin embargo, se requiere de un estudio en mayor profundidad para determinar el efecto de las interacciones entre N y S

    Solid Oxide Fuel Cell Development at Forschungszentrum Juelich

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    Solid oxide fuel cell (SOFC) development work at Forschungszentrum Juelich (FZJ) is extensive, ranging from fundamental materials' design through to near-commercial prototype CHP systems. Considerable advances have been demonstrated in the past years concerning the improvement of device performance by identifying performance degradation mechanisms and reducing or eliminating those problems, and in designing, developing and manufacturing core SOFC components. At the time of this writing, the first, fully integrated SOFC combined heat and power generation prototype system is awaiting completion. FZJ is involved m significant national and international programs and coordinates major international projects
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