896 resultados para Unidad de libros 1 al 4


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Hor., en Carm., 1, 2 y 4, 15 recoge una serie de referencias a dioses importantes para la familia adoptiva de Octaviano y para el propio gobernante, que han sido tradicionalmente analizadas e interpretadas desde un punto de vista interno: su presencia se explicaría en función de su relación con la gens Iulia. El punto de vista que quiero ofrecer en mi trabajo es complementario a éste: a partir de un análisis externo de las referencias a estos dioses, creo que su presencia se puede explicar en función de los templos en los que "habitaban" en Roma, del lugar donde estos templos se encontraban y de las representaciones icónicas que servían a su culto. Al mismo tiempo, la nueva relación que establezco entre 1,2 y 4, 15 aporta evidencias para una comprensión distinta de la segunda edición de la poesía lírica de Horacio, la que se presentó con el libro 4

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Hor., en Carm., 1, 2 y 4, 15 recoge una serie de referencias a dioses importantes para la familia adoptiva de Octaviano y para el propio gobernante, que han sido tradicionalmente analizadas e interpretadas desde un punto de vista interno: su presencia se explicaría en función de su relación con la gens Iulia. El punto de vista que quiero ofrecer en mi trabajo es complementario a éste: a partir de un análisis externo de las referencias a estos dioses, creo que su presencia se puede explicar en función de los templos en los que "habitaban" en Roma, del lugar donde estos templos se encontraban y de las representaciones icónicas que servían a su culto. Al mismo tiempo, la nueva relación que establezco entre 1,2 y 4, 15 aporta evidencias para una comprensión distinta de la segunda edición de la poesía lírica de Horacio, la que se presentó con el libro 4

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Hor., en Carm., 1, 2 y 4, 15 recoge una serie de referencias a dioses importantes para la familia adoptiva de Octaviano y para el propio gobernante, que han sido tradicionalmente analizadas e interpretadas desde un punto de vista interno: su presencia se explicaría en función de su relación con la gens Iulia. El punto de vista que quiero ofrecer en mi trabajo es complementario a éste: a partir de un análisis externo de las referencias a estos dioses, creo que su presencia se puede explicar en función de los templos en los que "habitaban" en Roma, del lugar donde estos templos se encontraban y de las representaciones icónicas que servían a su culto. Al mismo tiempo, la nueva relación que establezco entre 1,2 y 4, 15 aporta evidencias para una comprensión distinta de la segunda edición de la poesía lírica de Horacio, la que se presentó con el libro 4

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Desarrollo empresarial y creación de empresa

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Intenta detectar las áreas de mayor distribución de los langostinos, asimismo busca encontrar poblaciones de crustáceos de interés económico potencial, como el camaroncillo rojo, langostino rosado, langostino cáscara dura y la gamba roja.

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This paper describes the structural evolution of Y(0.9)Er(0.1)Al(3)(BO(3))(4) nanopowders using two soft chemistry routes, the sol-gel and the polymeric precursor methods. Differential scanning calorimetry, differential thermal analyses, thermogravimetric analyses, X-ray diffraction, Fourier-transform infrared, and Raman spectroscopy techniques have been used to study the chemical reactions between 700 and 1200 degrees C temperature range. From both methods the Y(0.9)Er(0.1)Al(3)(BO(3))(4) (Er:YAB) solid solution was obtained almost pure when the powdered samples were heat treated at 1150 degrees C. Based on the results, a schematic phase formation diagram of Er:YAB crystalline solid solution was proposed for powders from each method. The Er:YAB solid solution could be optimized by adding a small amount of boron oxide in excess to the Er:YAB nominal composition. The nanoparticles are obtained around 210 nm. Photoluminescence emission spectrum of the Er:YAB nanocrystalline powders was measured on the infrared region and the Stark components of the (4)I(13/2) and (4)I(15/2) levels were determined. Finally, for the first time the Raman spectrum of Y(0.9)Er(0.1)Al(3)(BO(3))(4) crystalline phase is also presented. (C) 2008 Elsevier Masson SAS. All rights reserved.

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The two minerals borickyite and delvauxite CaFe3+4(PO4,SO4)2(OH)8•4-6H2O have the same formula. Are the minerals identical or different? The minerals borickyite and delvauxite have been characterised by Raman spectroscopy. The minerals are related to the minerals diadochite and destinezite. Both minerals are amorphous. Delvauxite appears to vary in crystallinity from amorphous to semi-crystalline. The minerals are often X-ray non-diffracting. The minerals are found in soils and may be described as ‘colloidal’ minerals. Vibrational spectroscopy enables an assessment of the molecular structure of borickyite and delvauxite. Bands are assigned to phosphate and sulphate stretching and bending modes. Multiple water bending and stretching modes imply that non-equivalent water molecules in the structure exist with different hydrogen bond strengths. The two minerals show differing spectra and must be considered as different minerals.

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The influence of 0.03 and 0.08 at. % Ag additions on the clustering of Zn atoms in an Al-4.4 at. % Zn alloy has been studied by resistometry. The effect of quenching and ageing temperatures shows that the ageing-ratio method of calculating the vacancy-solute atom binding energy is not applicable to these alloys. Zone-formation in Al-Zn is unaffected by Ag additions, but the zone-reversion process seems to be influenced. Apparent vacancy-formation energies in the binary and ternary alloys have been used to evaluate the v-Ag atom binding energy as 0.21 eV. It is proposed that, Ag and Zn being similar in size, the relative vacancy binding results from valency effects, and that in Al-Zn-Ag alloys clusters of Zn and Ag may form simultaneously, unaffected by the presence of each other. © 1970 Chapman and Hall Ltd.

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Isochronal and isothermal ageing experiments have been carried out to determine the influence of 0.01 at. % addition of a second solute on the clustering rate in the quenched Al-4,4 a/o Zn alloy. The influence of quenching and ageing temperatures has been interpreted to obtain the apparent vacancy formation and vacancy migration energies in the various ternary alloys. Using a vacancy-aided clustering model the following values of binding free energy have been evaluated: Ce-0.18; Dy-0.24; Fe-0.18; Li-0.25; Mn-0.27; Nb-0.18; Pt-0.23; Sb-0.21; Si-0.30; Y-0.25; and Yb-0.23 (± 0.02 eV). These binding energy values refer to that between a solute atom and a single vacancy. The values of vacancy migration energy (c. 0.4 eV) and the experimental activation energy for solute diffusion (c. 1.1 eV) are unaffected by the presence of the ternary atoms in the Al-Zn alloy.

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Phosphatidylcholine (PC) and six other PC-similar lipids are coated on interdigital electrodes, IEs, as sensitive membranes. Eight alcohols (C-1-C-4) are tested in a flow system at room temperature. It is found that all responses are log(response)-log(concentration) linear relations. These results agree with Steven's law in psychophysics. Moreover, the thresholds of the sensors are coincident with human olfactory thresholds. The authors have analysed the data of the lipid hypothesis suggested by Kurihara et al. We have found that this hypothesis is also in agreement with Steven's law. Lipid microresistors are real mimicking olfactory sensors. A definition of an olfactory sensor is suggested.