949 resultados para Sistemas eletrônicos de medidas e de controle


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Enfermagem (mestrado profissional) - FMB

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This work was carried out using intercropped cultivation of garlic (Allium sativum) and carrot (Daucus carota) in Jaboticabal, SP - Brazil. Four seeding timings for carrot (0, 15, 30 and 45 days after garlic planting) and three weed management systems (herbicide, frequent manual weed control and no weed control) were tested. The effects of this intercropped system on weed control, efficient land use and productivity were determined. The experimental design was a completely randomized block with split-plots and four replications, with carrot seeding timings being the plots and the weed management systems, the sub-plots. The herbicide oxadiazon at 750 g ha-1 did not cause toxicity in the garlic, nor in the carrot plants. Regandress of the timing for the intercropping establishment the Land Equivalent Ratio (LER) values were greater than one. Garlic-carrot intercropping profitability was greater than that of monocultures of garlic crop, mainly under weed management systems, using the herbicide oxadiazon and frequent manual weeding.

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The thermocouple is used for obtaining the air temperature with sensitivity and optimum precision, beyond great advantage over the mercury or alcohol thermometer, because it generates electrical signals that can be stored in automated systems. However, when it comes to obtaining the relative humidity from thermocouple, it is needed caution due to other factors involved. In this study two sets of thermocouple psychrometers, aspirated and no-aspirated were evaluated, relative to a Vaisala set, from 17 to 31/01/2008 (15 days). From measurements of dry and wet bulb temperatures, the relative humidity value was obtained, and it was possible to compare them with the Vaisala set measurements. The two types of psychrometers showed precision and accuracy in measurements of air temperature, and only precision in measurements of relative humidity, being that the aspirated psychrometer presented more precision. Despite the no-aspirated psychrometer has lesser precision in measurements, it is more robust because it is independent of a 12 VDC micro-fan, making it, a sensor with lesser risk of inadequate measures. Both aspirated and no-aspirated psychrometers do not measure accurately the relative air humidity during night period.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Studies using bio(muco)adhesive drug delivery systems have recently gained great interest, which can promote drug targeting and more specific contact of the drug delivery system with the various absorptive membranes of the body. This technological platform associated with nanotechnology offers potential for controlling drug delivery; therefore, they are excellent strategies to increase the bioavailability of drugs. The objective of this work was to study nanotechnology-based polymeric bio(muco)adhesive platforms for controlling drug delivery, highlighting their properties, how the bio(muco)adhesion can be measured and their potential applications for different routes of administration.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Engenharia Elétrica - FEIS

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Pós-graduação em Engenharia Elétrica - FEIS

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Pós-graduação em Engenharia Elétrica - FEIS

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Pós-graduação em Engenharia Elétrica - FEIS

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)