Bøger af Marcelo Barcellos Da Rosa

La recherche scientifique et technologique sur les éléments terrestres rares (ETR) peut être considérée comme une question de stratégie nationale. Ils sont présents dans notre vie quotidienne dans les aimants permanents, les ampoules électriques, les puces informatiques, les moniteurs, les colorants pour verre, les appareils à rayons X, comme agents de contraste dans les examens cliniques, dans les lentilles à haute résolution, entre autres. En outre, on estime qu'un pays qui a la connaissance et/ou la maîtrise scientifique et technologique de ces éléments peut être considéré comme un pays très important sur la scène économique mondiale. Plus précisément, ce livre est issu d'un projet financé par le Conseil national de la recherche - MCT (CNPq 405806/2013-2). Il se caractérise par son caractère interdisciplinaire, car il implique des ressources humaines issues des domaines de l'ingénierie, des sciences naturelles et exactes et de la santé. Ce livre est considéré comme la première partie de ce projet majeur, tandis que la deuxième partie traite d'exemples plus spécifiques dans le domaine de la géologie, de la géophysique et de la géostatistique développés dans la région centrale de l'État du Rio Grande do Sul, au sud du Brésil. D'une manière générale, ce projet vise à aborder l'ETR d'un point de vue géologique, géophysique, chimique et pharmaceutique.

La ricerca scientifica e tecnologica sugli ELEMENTI TERRESTRI RARI (ETR) può essere considerata una questione di strategia nazionale. Sono presenti nella nostra vita quotidiana nei magneti permanenti, nelle lampadine, nei chip dei computer, nei monitor, nei coloranti del vetro, nelle macchine a raggi X, come agenti di contrasto negli esami clinici, nelle lenti ad alta risoluzione, tra gli altri. Inoltre, si ritiene che un Paese che abbia conoscenza e/o padronanza scientifico-tecnologica di questi elementi possa essere considerato un Paese molto importante sulla scena economica mondiale. Nello specifico, questo libro nasce da un progetto finanziato dal Consiglio Nazionale delle Ricerche - MCT (CNPq 405806/2013-2). Si caratterizza come interdisciplinare, in quanto coinvolge risorse umane provenienti dai settori dell'ingegneria, delle scienze naturali ed esatte e della salute. Questo libro è considerato la parte 1 di questo grande progetto, mentre la parte 2 tratta esempi più specifici nel campo della geologia, della geofisica e della geostatistica sviluppati nella regione centrale dello stato di Rio Grande do Sul, nel sud del Brasile. In generale, questo progetto mira ad affrontare l'ETR da una prospettiva geologica, geofisica, chimica e farmaceutica.

Scientific and technological research involving RARE EARTH ELEMENTS (REEs) can be considered a matter of national strategy. They are present in our daily lives in permanent magnets, light bulbs, computer chips, monitors, glass colourants, X-ray machines, as contrasting agents in clinical examinations, in high-resolution lenses, among others. Furthermore, it is believed that a country that has knowledge and/or scientific-technological mastery of these elements can be considered a very important country on the world economic stage. Specifically, this book comes from a project funded by the National Research Council - MCT (CNPq 405806/2013-2). It is characterised as interdisciplinary, as it involves human resources from the fields of engineering, natural and exact sciences and health. This book is considered part 1 of this major project, while part 2 deals with more specific examples in the field of geology, geophysics and geostatistics developed in the central region of the state of Rio Grande do Sul, southern Brazil. Generally speaking, this project aims to approach ETR from a geological, geophysical, chemical and pharmaceutical perspective.

Die wissenschaftliche und technologische Forschung im Bereich der Seltenen Erden (REEs) kann als nationale Strategie betrachtet werden. Sie sind in unserem täglichen Leben in Dauermagneten, Glühbirnen, Computerchips, Monitoren, Glasfarbstoffen, Röntgengeräten, als Kontrastmittel bei klinischen Untersuchungen, in hochauflösenden Linsen und vielem mehr enthalten. Darüber hinaus wird davon ausgegangen, dass ein Land, das diese Elemente kennt und/oder wissenschaftlich-technisch beherrscht, als ein sehr wichtiges Land auf der Weltwirtschaftsbühne angesehen werden kann. Dieses Buch ist das Ergebnis eines vom Nationalen Forschungsrat - MCT (CNPq 405806/2013-2) finanzierten Projekts. Es ist als interdisziplinär zu bezeichnen, da es Humanressourcen aus den Bereichen Ingenieur-, Natur- und exakte Wissenschaften sowie Gesundheit einbezieht. Das vorliegende Buch gilt als Teil 1 dieses Großprojekts, während Teil 2 spezifischere Beispiele aus den Bereichen Geologie, Geophysik und Geostatistik behandelt, die in der zentralen Region des Bundesstaates Rio Grande do Sul im Süden Brasiliens entwickelt wurden. Generell zielt dieses Projekt darauf ab, ETR aus einer geologischen, geophysikalischen, chemischen und pharmazeutischen Perspektive zu betrachten.

Polycyclic aromatics hydrocarbons (PAH) are an important class of pollutants ubiquitous in the environment. They have been spread from its source to different parts of the world, like Amazonia and Antartica, and they have already been related to many health issues, such as cancer, behavior disorders in children and miscarriage. In this study, spectrometric studies were conducted and a system, composed by a glass tube, a 50 mL trap and a succion pump, was developed to monitor the gas-solid mass transfer. Naphthalene, anthracene and chrysene were the compounds used on the studies, being representants of two, three and four-ring compounds, respectively. The mixture of XAD-2/Silica in a proportion of 2:1 gave the best results in terms of mass uptake of PAH and preliminar process kinetics, although it is recommended to use it in a proportion of 1:1, as it gives a better cost/benefit result. In addition, improvements on the system¿s temperature control are necessary for experiments with PAH with more than two rings.