937 resultados para VENTILACIÓN MECÁNICA - UTILIZACIÓN


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The economic viability of the electrical power generation using biogas from swine wastes, was determined. The analyzed biodigester is a continuous tubular model with brick concrete duct and plastic covering with a gasometer, in which the waste of 2.300 fattening pigs are deposited daily. The initial investment estimate for the installation was R$ 51.537, the system annual costs were R$ 5.700, for maintenance, R$ 4.400 for depreciation and R$ 1.370 for interests. It was found that an average consumption of 28 kW-hour-1 is the minimum that the system must reach to be economically feasible.

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El Manual describe el uso y alcance de la Tarjeta de Registro Bibliografico (TRB), utilizada en DOCPAL para consignar los elementos que describen un determinado documento.

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El Manual recoge la experiencia de DOCPAL/CELADE en la indizacion de los documentos ingresados a la base de datos y se orienta a servir de guia a las unidades de informacion que han adoptado tecnicas manuales o semi-mecanizadas para el tratamiento de la misma en la region. Previa la presentacion de las definiciones basicas, se discute el marco de referencia y las caracteristicas del proceso de indizacion. La descripcion de los instrumentos y pautas pone enfasis en la utilizacion del Tesauro Multilingue sobre Poblacion para el analisis de la informacion y en las Tarjetas Unitermino, para el registro del proceso.

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The propagation of 'juçara' and 'açaí' is done by seeds, but there is a great desuniformity in the germination process. In this way, the objective of this study was to verify the effect of temperature, mechanical scarification and substrate on seed germination of both species. Two experiments were conducted in a completely randomized design, with four replications each consisting of 25 seeds. The first was conducted with 14 treatments in factorial scheme 7 x 2, seven temperatures (20, 25, 30, 35, 20-30 and 25-35 °C and natural condition), with and without mechanical scarification. The second was constituted of eight treatments in factorial scheme 4 x 2, four substrates (sand, vermiculite, coconut fiber and soil + manure), with and without mechanical scarification. Seeds of 'juçara' palm present the highest mean percentage and germination speed index in alternating temperatures of 20-30 and 25-35 °C and natural condition and in substrates sand, vermiculite and coconut fiber. Temperatures of 30, 35, 20-30 and 25-35 °C and natural condition in all substrates tested were the most favorable condition for 'açai' seeds. The scarification of the seeds was favorable to the germination process of 'juçara' whereas the seeds of açaí does not need to be scarified.