Browsing by Title Facultad de Ciencias
Now showing items 4778-4797 of 8173
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(2002)A unique diterpene 1, was isolated from the altiplane Andean plant Azorella madreporica Clos (Apiaceae). The structure and stereochemistry were established by spectral methods and molecular mechanics calculations. The ...
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(Cambridge University Press, 2005)
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(1994)Magellanin, a new triterpene dimer was isolated from Maytenus magellanica. Its structure was elucidated by spectroscopy based on a novel unit combination. © 1994 Harwood Academic Publishers GmbH.
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(Blackwell Publishing Ltd, 2015)©2015. American Geophysical Union. All Rights Reserved. Remote and in situ observations in the solar wind show that ion and electron velocity distributions persistently present deviations from thermal equilibrium. Ion ...
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(2009)The (Mn1−xCdx)Cr2S4 phases (0≤x≤0.6) have been synthesized from the corresponding elements at 1123 K. These sampleswere characterized by powder X-ray diffraction (XRD) and magnetic susceptibility. The(Mn1−xCdx)Cr2S4 ...
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(MDPI, 2020)This article describes the use of beta-cyclodextrin-based carbonate nanosponges (NSs) decorated with superparamagnetic Fe3O4 nanoparticles to study and investigate the potential removal of dinotefuran (DTF) from wastewater. ...
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(2009)Nucleation and propagation of a domain wall along a modulated wire as a function of its geometry has been investigated. In all the cases, nucleation began at the thicker section and propagated toward the thinner section, ...
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(Oxford University Press, 2017)As another step towards understanding the long-term evolution of the magnetic field in neutron stars, we provide the first simulations of ambipolar diffusion in a spherical star. Restricting ourselves to axial symmetry, ...
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(Elsevier, 2016)The observations in the solar wind, which are usually organized in a beta-anisotropy diagram, seem to be constrained by linear instability thresholds. Unexpectedly, under these quasi-stable conditions, there is a finite ...
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(1989)The magnetization of thin ferromagnetic metal slabs deposited on a paramagnetic metal substrate is investigated by means of a model calculation. The magnetic behavior of the system is described by a single-site Hubbard ...
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(ELSEVIER, 2006-10-01)Magnetic properties of sulfide spinels derived from the lutetium manganese thiospinel MnLu2S4 are reported. In this first approach, we have partially substituted lutetium by other lanthanides or by some transition metal ...
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(Springer, 2017-05-25)The magnetic phases of cobalt nanocylinders at the molecular scale have been studied by means of density functional theory together with micromagnetism. Diameters of the objects are under 1 nm. The magnetic phases resulting ...
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(Wiley, 2014)New solid solutions Cu2MnxFe1 xSnS4 were prepared by direct combination of the corresponding elements at 850 8C. The crystal structure of Cu2Mn0.4Fe0.6SnS4 was determined by single-crystal X-ray diffraction. This phase ...
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(Wiley-VCH Verlag, 2014)New solid solutions Cu2MnxFe1-xSnS4 were prepared by direct combination of the corresponding elements at 850°C. The crystal structure of Cu2Mn0.4Fe0.6SnS4 was determined by single-crystal X-ray diffraction. This phase is ...
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(TAYLOR & FRANCIS LTD, 2010)Arrays of Co nanowires with different lengths and diameters have been prepared by electrodeposition into nanopores of alumina and polycarbonate membranes. The dependence of the coercivity and remanence of the arrays as ...
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(Royal Society Chemistry, 2017)Asymmetric macrocyclic complexes of the type [M2LCl2]center dot xH(2)O have been obtained and intercalated using the potassium precursor phase K0.4Mn0.8PS3 center dot H2O (M: Zn-II or Cu-II; LH2: macrocyclic ligand derived ...
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(The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics, 2007-07)We report a comparative study of the magnetic properties of free-standing PdN clusters (2 ≤ N ≤ 21) obtained through two different theoretical approaches that are extensively employed in electronic structure calculations: ...
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(KYOTO UNIV, RESEARCH INST MATHEMATICAL SCIENCES, 2009-04-24)In previous articles, a magnetic pseudodifferential calculus and a family of C-algebras associated with twisted dynamical systems were introduced and the connections between them have been established. We extend this ...
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(2008)In this work we report results from continuous-wave (CW) and pulsed electron paramagnetic resonance (EPR) and proton nuclear magnetic resonance (NMR) studies of the vanadium pentoxide xerogel V2O 5:nH2O (n ≈ 1.6). The low ...
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(TAYLOR & FRANCIS LTD, 2006)This work describes an Electron Paramagnetic Resonance (EPR) and Nuclear Magnetic Resonance (NMR) study of the vanadium pentoxide xerogel V2O5:nH(2)O with n approximate to 1.8 Experiments were performed in the temperature ...
