This research aims to study and conduct assessment of !he speed up of corrosion of aluminum alloys used far domestic as well as !he influence of corrosive agents present to make use of these domestic articles in means of different pHs. To study three means were chosen: Acid mean (solution of Acetic ac id pH = 4.8), Basic mean (solution of sodium hydroxide pH = 9 .5) and Saline mean (solution of sodium chloride pH = 7.8) and tour types of aluminum alloys far use common: FAM or 1100 alloy as standardized pattern sample, R-1, R-2 and R-3 as samples of recycled aluminum. The tests showed that FAM is the most resistant material to the three aggressive means and it is the material with a lower content of impurities , R-3 is !he most attacked and is the material with the highest percentage of impurities. The most aggressive mean corresponds to the Saline mean and it is precisely !he most used m...

La presente investigación tiene como objetivo realizar estudio y evaluación de la velocidad de corrosión de las aleaciones de aluminio para uso doméstico, así como la influencia de agentes corrosivos presentes al hacer uso de estos artículos domésticos en medios de diferentes pHs. Para los efectos de estudio se eligieron tres medios agresivos : medio ácido (solución de ácido acético pH = 4,8), medio básico (solución de hidróxido de sodio pH = 9,5) y medio salino (solución de cloruro de sodio pH = 7,8); y cuatro tipos de aleaciones de aluminio para uso común: FAM o aleación 1100 como muestra patrón estandarizada , R-1, R-2 y R-3 como muestras de aleaciones de aluminio reciclado . Los ensayos demostraron que FAM es el material más resistente a los tres medios agresivos y es pre­ cisamente el material con menor contenido de impurezas, R-3 es el más atacado y de mayor po...

The Brazil Nut Tree, Bertholettia excelsa, while providing a fruit rich in all kinds of nutrients for human health, contributes to environmental conservation. The temperature and humidity of the environment in which they grow and are harvested, coupled with inadequate management of fruits, at harvest, post harvest, processing and storage; favor fungal infection and the production of derivatives difuranocumarinas, known as the aflatoxins (AFs) B1, B2, G1 and G2 whose identification is derived by the blue and green color emitted from the fluorescence when exposed to UV light. In this paper, it has been evaluated the use of a UV excitation source as part of a system to recognize the fluorescence emitted by the Brazil Nut Tree; making the separation easier and faster from those which are contaminated by FAs. The selection by detecting fluorescent emission depends on the type of detectors and...

The Brazil Nut Tree, Bertholettia excelsa, while providing a fruit rich in all kinds of nutrients for human health, contributes to environmental conservation. The temperature and humidity of the environment in which they grow and are harvested, coupled with inadequate management of fruits, at harvest, post harvest, processing and storage; favor fungal infection and the production of derivatives difuranocumarinas, known as the aflatoxins (AFs) B1, B2, G1 and G2 whose identification is derived by the blue and green color emitted from the fluorescence when exposed to UV light. In this paper, it has been evaluated the use of a UV excitation source as part of a system to recognize the fluorescence emitted by the Brazil Nut Tree; making the separation easier and faster from those which are contaminated by FAs. The selection by detecting fluorescent emission depends on the type of detectors and...