The Effect of the Addition of Re and Ge on the Properties of Pt/Al2O3

The effect of Re and Ge addition to Pt/Al2O3 was studied. Mono-, bi- and a trimetallic catalysts were prepared and characterized by TPR, XPS, TPO and by the n-pentane, cyclohexane (CH) and n-octane reactions. It was found that the trimetallic was the most active and stable catalyst and showed selectivities to aromatics and isomers very similar to the bimetallic germanium-based catalyst.Fil: Souza Santos, M.C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Grau, Javier Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Pieck, Carlos Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Parera, Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Fierro, J.L.G.. Instituto de Catálisis y Petroleoquímica; EspañaFil: Figoli, Nora Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Rangel, Maria do Carmo. Universidade Federal da Bahia; Brasi

Towards a reusable architecture for message exchange in pervasive healthcare

The main objective of this paper is to present a reusable architecture for message exchange in pervasive healthcare environments meant to be generally applicable to different applications in the healthcare domain. This architecture has been designed by integrating different concepts and technologies of ubiquitous computing, software agents, and openEHR archetypes, in order to provide interoperability between healthcare systems. The architecture was demonstrated and evaluated in controlled experiments that we conducted at three cardiology clinics, an analysis laboratory, and the cardiology sector of a hospital located in Marília (São Paulo, Brazil). Three applications were developed to evaluate this architecture, and the results showed that the architecture is suitable to facilitate the development of healthcare systems by offering generic and powerful message exchange capabilities. The reusable architecture speeds up the development of new applications, reducing the number of mistakes and the development time. The proposed architecture facilitates message exchanging between caregivers, contributing in this way to the development of pervasive healthcare systems that allow healthcare to be available anywhere, anytime, and to anyone

Efeitos da compactação em algumas propriedades físicas do solo e seu reflexo no desenvolvimento das raízes de plantas de soja Effects of soil compaction on some physical properties and on root growth of soybean

Estudou-se o efeito de vários níveis de compactação na densidade do solo, porosidade total e resistência à penetração, objetivando determinar o nível que impede o desenvolvimento das raízes de plantas de soja. O trabalho foi realizado em casa de vegetação, com amostras deformadas do horizonte superficial de uma terra roxa estruturada e de um latossolo roxo, controlando os níveis de compactação e o teor de água. A influência da compactação no desenvolvimento das raízes foi avaliada um mês após a germinação. Os valores de densidade do solo, para um mesmo nível de compactação, foram maiores para a terra roxa estruturada. O teor de água ótimo para a compactação foi de 21,0% para a terra roxa estruturada e de 29,8 para o latossolo roxo. A compactação artificial do solo acarretou aumento da resistência à penetração e diminuição da porosidade total. A elevação da sua densidade de 0,90 para 1,30 kg/m³ para a terra roxa estruturada, e de 0,90 para 1,23 kg/m³ para o latossolo roxo, promoveu, respectivamente, diminuição de 39 e de 41% na massa seca das raízes. O desenvolvimento das raízes das plantas ficou impedido quando a densidade do solo atingiu valores de 1,30 e 1,23 kg/m³, respectivamente, para a terra roxa estruturada e o latossolo roxo.<br>The effects of an artificial soil compaction on soil density, total porosity and soil resistance to penetration were studied with the aim to determine the level that obstructs root development of soybean. The work was carried out in greenhouse, with disturbed samples of surface horizon of an Ultisol ("Terra Roxa Estruturada") and an Oxisol ("Latossolo Roxo"), and controlling the level of compaction and the soil water content. The influence of soil compaction on root growth of soybean was evaluated one month after germination. The Ultisol showed higher soil density values than the Oxisol for the same compaction level. The optimum soil water content value for compaction was 21.0% in the Ultisol and 29.8% in the Oxisol. The increase on compaction level resulted (on the both soils) in an increase of mechanical impedance of penetration and decrease of total porosity. The increase in soil density of 0.90 to 1.30 kg/m³ in the Ultisol, and 0.90 to 1.23 kg/m³ in the Oxisol reduced the development of soybean roots, respectively, in 39 and 41%. The development of the soybean roots was severely reduced for soil density values of 1.30 and 1.23 kg/m³, respectively, in the Ultisol and in the Oxisol