On the relation between the IR continuum and the active galactic nucleus in Seyfert galaxies

A sample of the brightest known Seyfert galaxies from the CfA sample is analyzed on the basis of ISO photometric and spectroscopic data. Regardless of the Seyfert type, the mid-IR continuum emission from these galaxies is found to be correlated with the coronal line emission arising in the nuclear active region. Conversely, the correlation degrades progressively when moving from the mid- to the far-IR emission, where it ends to vanish. It is concluded that the mid-IR emission is largely dominated by dust heated by processes associated with the active nucleus whereas the far-IR is a different component most probably unrelated with the active region. We suggest that the far-IR component is due to dust heated by the stellar population in the disks of these galaxies.Comment: 6 pages, 3 figures To be published in Astronomy and Astrophysic

Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma

We study the sensitivity for testing the anomalous triple gauge couplings $ZZ\gamma$ and $Z\gamma\gamma$ via the process $e^+e^-\to \nu \bar\nu \gamma$ at high energy linear colliders. For integrated luminosities of 500 $fb^{-1}$ and center of mass energies between 0.5 and 1.5 $TeV$, we find that this process can provide tests of the triple neutral gauge boson couplings of order $10^{-4}$, one order of magnitude lower than the standard model prediction.Comment: 12 pages, 6 figure

Exotismos y redefinición de personajes femeninos: tres novelas populares de mujeres de la Segunda Guerra Mundial

My article focuses on the analysis of three popular romances by British women authors, with historical settings that range from the 1920s to the 1960s and the present time: Leah Fleming’s The War Widows (2008) and Mothers and Daughters (2009), and Katherine Webb’s The English Girl (2016). These novels revisit the historical context of World War 2 and its aftermath, a backward glance relished by millions of readers worldwide, who travel in time as participants of an addictive sort of historical exoticism. The appeal however does not end here, for these novels also exploit attractive or mysterious settings, and in traditional romance fashion, employ seductive male figures against whose intentions the heroines redefine their identities. As I shall argue throughout this article, the three novels by Fleming and Webb employ a threefold application of the “exotic” trope —historical, geographic, and emotional—as background for the presentation of heroines who, after a period of trials, find their renewed identities and life goals.Este artículo analiza tres romances populares de autoras británicas, que se desarrollan en el periodo histórico desde la década de los 1920 hasta la de los 1960 y el momento actual: The War Widows (2008) y Mothers and Daughters (2009) de Leah Fleming, y The English Girl (2016) de Katherine Webb. Estas novelas regresan al contexto histórico de la Segunda Guerra Mundial y su etapa posterior, lo que supone una mirada al pasado apreciada por millones de lectores en todo el mundo, que viajan en el tiempo como participantes de un exotismo histórico que resulta adictivo. El atractivo de esta fórmula sin embargo conlleva también la descripción de localizaciones atractivas o misteriosas; además, siguiendo la tradición de la ficción popular de mujeres, estas novelas incluyen seductores personajes masculinos que contribuyen a que las protagonistas redefinan sus identidades. En mi artículo argumento que las tres novelas de Fleming y Webb emplean una doble aplicación del exotismo —histórico y geográfico— como contexto para la presentación de las heroínas que, tras periodos de dificultades, se definen por medio de nuevas identidades y objetivos vitales

Purification of Starch Granules from Arabidopsis Leaves and Determination of Granule-Bound Starch Synthase Activity

Starch constitutes the most important carbon reserve in plants and is composed of branched amylopectin and linear amylose. The latter is synthesized exclusively by the Granule-Bound Starch Synthase (GBSS, EC 2.4.1.21). Here we report a readily reproducible, specific and highly sensitive protocol, which includes the isolation of intact starch granules from Arabidopsis thaliana leaves and the subsequent determination of GBSS activity. We have applied this method to study GBSS activity in diurnal cycles in vegetative growth and during the photoperiodic transition to flowering in Arabidopsis (Tenorio et al., 2003; Ortiz-Marchena et al., 2014).España,MINECO CSD2007-00057, BIO2008-02292, and BIO2011-28847-C02-00España, Junta de Andalucía P06-CVI-01450 and P08-AGR-0358