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Mantle dynamics and characteristics of the Azores plateau
Adam, Claudia; Madureira, Pedro; Miranda, Jorge Miguel; Lourenço, Nuno; Yoshida, M.; Fitzenz, DelphineSituated in the middle of the Atlantic Ocean, the Azores plateau is a region of elevated topography encompassing the triple junction between the Eurasian, Nubian and North American plates. The plateau is crossed by the Mid-Atlantic Ridge, and the Terceira Rift is generally thought of as its northern boundary. The origin of the plateau and of the Terceira Rift is still under debate. This region is associated wit...
Mantle dynamics and volcanism emplacement in the Azores
Adam, Claudia; Lourenço, Nuno; Madureira, Pedro; Miranda, Miguel; Yoshida, M.The Azores plateau is a triangular shaped topographic feature encompassing the boundary zone where three major tectonic plates (EU, NU and NA) meet. The eastern side of the plateau is delimited by two major tectonic discontinuities: the Mid Atlantic Ridge, and the Terceira Rift, a recently formed ultra-slow-spreading ridge. The origin of the plateau is still under debate. One hypothesis argues that the plateau ...
STM probing of local oscillations of the Fano-Kondo effect: a Doniach-Sunjic ap...
Seridonio,A. C.; Oliveira,L.N.; Yoshida,M.The use of the scanning tunneling microscope (STM) for the investigation of Kondo adatoms on normal metallic surfaces reveals a Fano-Kondo behavior of the conductance as a function of the tip bias. In this work, the Doniach-Sunjic expression is used to describe the Kondo peak and we analyze the effect of a complex Fano phase, arising from an external magnetic field, on the conductance pattern. It is demonstrate...
Morphological and thermal analyses of flexible polyurethane foams containing co...
Sant'Anna,S. S.; Souza,D. A.; Carvalho,C. F.; Yoshida,M. I.One filler often utilized in flexible polyurethane foams is calcium carbonate (CaCO3) because it is non-abrasiveness, non-toxicity and facilitated pigmentation. However, it is observed that the excess of commercial CaCO3 utilized in industry possibly causing permanent deformations and damaging the quality of the final product. The effect of different concentrations of commercial CaCO3, in flexible foams, was st...
An investigation of structural and magnetic properties of the Nd16Co72-xRu xC11...
Paduani,C.; Valcanover,J. A.; Ardisson,J. D.; Yoshida,M. I.Nd16Co72-xRu xC11B boro-carbides have been prepared by arc melting and studied by X-ray diffraction and magnetization measurements. X-ray diffraction results confirm that all the prepared alloys possess the tetragonal 2:14:1 (P4(2)/mmm) hard magnetic phase. The observed decrease of the magnetization and Curie temperature indicate the development of antiferromagnetic spin correlations with the increase of the Ru...
Characterization of the structural and magnetic properties of Nd16Co76-xRu xC7B...
Paduani,C.; Valcanover,J. A.; Ardisson,J. D.; Samudio Pérez,C. A.; Yoshida,M. I.The Nd16Co76-xRu xC7B system has been investigated to assess the effect of boron-carbon combined addition on the ferromagnetic behavior of these intermetallic compounds. The results indicate that the addition of 1 at.% B favors the formation of the tetragonal magnetic phase 2:14:1 in these alloys. With the increase of the Ru concentration is observed an expansion of the lattice in the basal plane as well as a c...
Structural and magnetic properties of the half-ferromagnetic Co2+x+yMn1-xAl1-y ...
Paduani,C.; Migliavacca,A.; Krause,J.C.; Ardisson,J.D.; Yoshida,M.I.Co2+x+yMn1-xAl1-y intermetallic compounds have been prepared by arc melting and studied with X-ray diffraction and magnetization measurements to ascertain the effect of deviations of composition from the stoichiometry on the ferromagnetism of this system. Hysteresis loops registered at room temperature show a soft ferromagnetic behavior in excess Co. In off-stoichiometric alloys the saturation magnetization is ...
Electrochemical evaluation of lipophilic antioxidants from Iryanthera juruensis...
Silva,D. H. S.; Pereira,F. C.; Yoshida,M.; Zanoni,M. V. B.TLC autographic assays revealed in the hexane extract of Iryanthera juruensis (Myristicaceae) the presence of two compounds, with antioxidant properties towards beta-carotene. They were isolated and identified as 3-methyl-sargachromenol (1) and sargachromenol (2). Further investigation of the hexane extract led to isolations of 3-methyl-sargaquinoic acid (3) and sargaquinoic acid (4). The electrochemical behavi...
MODEL OF A PROCESS FOR DRYING Eucalyptus spp AT HIGH TEMPERATURES
PINHEIRO,P. C. C.; RAAD,T. J.; YOSHIDA,M. I.A mathematical model of a process for drying of Eucalyptus spp is presented. This model was based on fundamental heat and mass transfer equations and it was numerically solved using a segregated finite volume method. Software in the FORTRAN language was developed to solve the mathematical model. The kinetic parameters of drying for Eucalyptus spp were experimentally obtained by isothermal thermogravimetry (TG)....
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