Gene flow risk assessment in centres of crop origin and diversity

Poster presented at Plant Biology & Botany Join Congress. Chicago (USA), 7-11 Jul 200

Convergent discrete numerical solutions of strongly coupled mixed parabolic systems

This work has been partially supported by the Spanish D.G.I.C.Y.T. grant BMF 2000-0206-C04-04Jódar Sánchez, LA.; Casabán, M. (2003). Convergent discrete numerical solutions of strongly coupled mixed parabolic systems. UTILITAS MATHEMATICA. 63:151-172. http://hdl.handle.net/10251/161860S1511726

Empleo de la composición química de minerales ferromagnesianos como indicadores de variables termodinámicas y químicas en la cristalización de rocas igneas: aplicación a los casos particulares de biotitas y granitoides del centro oeste de España

Se establecen en biotitas las relaciones entre: Rb y K/Rb y la naturaleza del granito, funciones de los contenidos en Al, Fe y Mg y la alcalinidad y temperatura en la cristalización, y finalmente, paragénesis de minerales alumínicos, grado de influencia en los diversos elementos en las esferasde coordinación tetraédrica y octaédrica, y variaciones de contenidos en elementos trazas con la alcalinidad. Las conclusiones se vinculan a la génesis de yacimientos típicamente asociados a granitos

Factor de riego para nectarino

Ministerio de Economía y Competitividad AGL2013-49047-C02-2

Determination of the Three Main Components of the Grapevine Moth Pest Pheromone in Grape-Related Samples by Headspace-Gas Chromatography- Mass Spectrometry

The grapevine moth (Lobesia botrana) is the most significant pest of viticulture. This article reports the development of an analytical method that allows the instrumental determination of the three main pheromone components of the pest ((E,Z)-7,9-dodecadien-1-yl acetate, (E,Z)-7,9-dodecadien-1-ol and (Z)-9-dodecen-1-yl acetate) in grape-related samples (must, table grape and wine grape). The combination of headspace, gas chromatography and mass spectrometry provides limits of detection in the range of 60–420 ng/Kg and precision, expressed as a relative standard deviation, better than 8.5%. This analytical approach is rapid and simple and opens a door to the study of the pest incidence on the final products

Incidencia de las características personales e inherentes al empleo sobre la satisfacción de los trabajadores en España

Con este trabajo se pretende determinar qué características afectan en mayor medida a la satisfacción de los trabajadores. El ámbito de aplicación es el mercado de trabajo español actual, aquejado de una fuerte recesión e inestabilidad. Se trata de averiguar si son las características personales de los trabajadores o si, por el contrario, son las características referidas a la organización las que influyen en mayor grado en la satisfacción laboral. Los datos provienen de la Encuesta de Calidad de Vida en el Trabajo, del Ministerio de Trabajo e Inmigración del año 2010. Mediante modelos lineales (ANOVA) se concluye que las variables inherentes al trabajo arrojan mejores resultados para explicar la satisfacción del trabajador, además, todos los coeficientes son positivos. Por último, se propone un modelo de regresión múltiple stepwise que permita jerarquizar la aportación de las distintas variables referidas al empleo sobre la satisfacción de los trabajadores; de todas ellas, la que tiene mayor incidencia es la motivación. This paper tries to determine the main features of the labour satisfaction. We applied the mentioned analysis to the current Spanish labour market, which is affected by a deep recession and instability. We want to get differences between personal and job-related features in order to find which better explain the labour satisfaction. Data come from the Quality of Labour Life Survey corresponding to the year 2010 by Ministry of Labour and Immigration of Spain. By means of linear models (ANOVA) we find that job-related variables explain better labour satisfaction, also, all the coefficients are positive. Finally, we propose a stepwise multiple regression which let us to put in order the effect of job-related variables on labour satisfaction. The variable with higher influence on labour satisfaction is motivation

Resonant x-ray scattering study of charge superstructures in layered L a2-x C axCo O4±d (0.4=x=0.7) and L a1.5 S r0.5Co O4 compounds

We propose a model for the Co charge disproportionation in La2-xCaxCoO4±d (0.4=x=0.7) and La1.5Sr0.5CoO4 layered cobaltites based on the photon energy, azimuthal angle, and polarization dependence of the scattered intensity of selected reflections in a resonant x-ray scattering experiment. Tetragonal superlattice (h/2, h/2, l)-type reflections were detected at room temperature for all the samples independently from the Ca (or Sr) doping rate in agreement with a checkerboard ordering of two different Co sites. The corresponding average charge disproportion is accounted for by a semiempirical model from which the imaginary part of the resonant atomic scattering factors of each of the two Co atoms is obtained resulting in about 0.5±0.1 electron. Moreover, no forbidden (h/4, h/4, l)-type reflections were observed at room temperature indicating the lack of any local anisotropy ordering in contrast with the behavior found in the related layered manganites. Finally, we found the pattern of small distortions (~0.05Å) around the two Co sites compatible with the resonant x-ray scattering results. The symmetry of this displacement pattern is consistent with the A2mm (or Ammm) orthorhombic structure of the ordered phase and the structural transition is accounted for by the condensation of two soft modes - X1+(B2u) and X1+(A1) - acting on the oxygen atoms

Resonant x-ray scattering in La1-xSr1+xMn0 4 (x 0.5): Incommensurate-lattice modulation vs. Charge-stripe models

Using resonant x-ray scattering at the Mn K-edge, we have investigated the nature of the charge and lattice modulation in the La1-xSr1+xMnO4 (x=0.5 and 0.6) manganites. Resonant reflections (h±e, h±e, 0) and (h±2e, h±2e, 0) of the tetragonal I4/mmm structure with a modulation vector of 2e=l-x were found in the insulating phases of both manganites but the intensity of these reflections is much weaker for La0.4Sr1.6MnO4. Resonant x-ray scattering data for the two samples are well explained by the presence of two types of sinusoidal modulations of the oxygen displacements, transverse and longitudinal to the tetragonal [110] direction. The amplitude of the oxygen displacements for any of the modulations decreases with the hole doping, in agreement with the change from a commensurate (x=0.5) to an incommensurate (x=0.6) ordered phase. The different polarization and azimuthal behaviour of the two sets of resonant reflections rule out any kind of stripe model composed by Mn3+-like and Mn4+-like charge-ordering. The maximum charge disproportionation among the different Mn atoms in the unit cell is about 0.15 e- and 0.04 e- for the x=0.5 and x=0.6 samples, respectively. These results thus confirm the existence of a charge-density-wave ordering in both the commensurate-phase of the half-doped La0.5Sr1.5MnO4 and the incommensurate-phase of the over-doped La0.4Sr1.6MnO4 manganites