Suchergebnisse

This text highlights the importance of managing the passions, affections and emotions in neoliberal Fear politics. Thanks to the thinking of Sara Ahmed who analyses how today the workings of emotions are economic, talking about "affective economies." The production model of the emotions of Ahmed puts forward a critique of the privatisation and the psychologising of emotions, given that emotions are performative in their circulation. Returning to the idea of affect of shame as a transformational performance of Eve Kosofky Sedgwick, the text also explores the performative potential that can be deployed in a process of collectivisation of shame against the neoliberal politics of fear and hate whether that be in the context of activism, contemporary art or the production of images.

This paper aims to determine the urban wage premium in Ecuador. It estimates two wage equations with the nominal and real wage, using instrumental variables to control endogeneity. Four indicators are applied to measure up the urban premium: area, classification by size of a city, cantonal population, and number of firms per capita. The latter is used for the first time and proves to be a better measure to reflect the urban premium. The results show that workers located in metropolis and big cities earn wages 14% and 4% higher than those workers located in small towns, respectively. The wage elasticity is 0.03% with respect to cantonal population, and 0.06% with respect to the number of firms.

17 páginas, 3 tablas, 12 figuras, 4 figuras complementarias ; Seed shape in species of the Cactaceae is described by comparison with geometric models. Three new groups of models are presented, two for symmetric seeds, and a third group for asymmetric seeds. The first two groups correspond, respectively, to superellipses and the combined equations of two semi-ellipses. The third group contains models derived from the representation of polar equations of Archimedean spirals that define the shape of asymmetric seeds in genera of different subfamilies. Some of the new models are geometric curves, while others are composed with a part resulting from the average silhouettes of seeds. The application of models to seed shape quantification permits the analysis of variation in seed populations, as well as the comparison of shape between species. The embryos of the Cactaceae are of the peripheral type, strongly curved and in contact with the inner surface of the seed coat. A relationship is found between seed elongation and the models, in which the genera with elongated seeds are represented by models with longer trajectories of the spiral. The analysis of seed shape opens new opportunities for taxonomy and allows quantification of seed shape in species of the Cactaceae ; Project "CLU-2019-05-IRNASA/CSIC Unit of Excellence", funded by the Junta de Castilla y León and co-financed by the European Union (ERDF "Europe drives our growth"). ; Peer reviewed

17 páginas, 10 figuras, 3 tablas ; The Vitaceae Juss., in the basal lineages of Rosids, contains sixteen genera and 950 species, mainly of tropical lianas. The family has been divided in five tribes: Ampelopsideae, Cisseae, Cayratieae, Parthenocisseae and Viteae. Seed shape is variable in this family. Based on new models derived from equations representing heart and water drop curves, we describe seed shape in species of the Vitaceae. According to their similarity to geometric models, the seeds of the Vitaceae have been classified in ten groups. Three of them correspond to models before described and shared with the Arecaceae (lenses, superellipses and elongated water drops), while in the seven groups remaining, four correspond to general models (waterdrops, heart curves, elongated heart curves and other elongated models) and three adjust to the silhouettes of seeds in particular genera (heart curves of Cayratia and Pseudocayratia, heart curves of the Squared Heart Curve (SqHC) type of Ampelocissus and Ampelopsis and Elongated Superellipse-Heart Curves (ESHCs), frequent in Tetrastigma species and observed also in Cissus species and Rhoicissus rhomboidea). The utilities of the application of geometric models for seed description and shape quantification in this family are discussed. ; Project "CLU-2019-05-IRNASA/CSIC Unit of Excellence", funded by the Junta de Castilla y León and co-financed by the European Union (ERDF "Europe drives our growth"). ; Peer reviewed

44 Pags., 7 Tabls., 1 Suppl. Tabl., 6 Figs. First published online: October 25, 2013. The definitive version is available at: http://treephys.oxfordjournals.org/ ; An understanding of the mechanisms that determine plant response to reduced water availability is essential to improve water-use efficiency (WUE) of stone fruit crops. The physiological, biochemical and molecular drought responses of four Prunus rootstocks (GF 677, Cadaman, ROOTPAC 20 and ROOTPAC® R) budded with 'Catherina' peach cultivar were studied. Trees were grown in 15-l containers and subjected to a progressive water stress for 26 days, monitoring soil moisture content by time domain reflectometry. Photosynthetic and gas exchange parameters were determined. Root and leaf soluble sugars and proline content were also measured. At the end of the experiment, stressed plants showed lower net photosynthesis rate, stomatal conductance and transpiration rate, and higher intrinsic leaf WUE (AN/gs). Soluble sugars and proline concentration changes were observed, in both root and leaf tissues, especially in an advanced state of stress. The accumulation of proline in roots and leaves with drought stress was related to the decrease in osmotic potential and increase in WUE, whereas the accumulation of sorbitol in leaves, raffinose in roots and proline in both tissues was related only to the increase in the WUE. Owing to the putative role of raffinose and proline as antioxidants and their low concentration, they could be ameliorating deleterious effects of drought-induced oxidative stress by protecting membranes and enzymes rather than acting as active osmolytes. Higher expression of P5SC gene in roots was also consistent with proline accumulation in the tolerant genotype GF 677. These results indicate that accumulation of sorbitol, raffinose and proline in different tissues and/or the increase in P5SC expression could be used as markers of drought tolerance in peach cultivars grafted on Prunus rootstocks. ; This research was partly funded by the Spanish MICINN (Ministry of Science and Innovation) AGL2008-00283 and AGL2011-24576 (co-financed with FEDER), the Aragon Government A44 and the "Obra Social La Caixa" - Aragon Government GALC- 0007/2010 grants. S. Jiménez was supported by a JAE-Doc fellowship from CSIC/ESF (Spanish Council for Scientific Research/European Social Fund) and J. Dridi by a fellowship from the CIHEAM-IAMZ. ; Peer reviewed