Réflexions sur l'appauvrissement des syntaxons aux limites chorologiques des unités phytosociologiques supérieurs et quelques-unes de leurs consequences

Con la ayuda de algunos ejemplos, se estudia el comportamiento de los sintáxones en los límites corológicos de las unidades fitosociológicas superiores; se muestra que, a medida que nos alejamos de su centro de gravedad, esas unidades pierden poco a poco sus especies y que, en sus límites corológicos, no quedan más especies características de unidades superiores para definir las comunidades. Se evocan entonces algunas consecuencias de esas observaciones: noción de combinación específica original, interpretación fitosociológica de los sintáxones, nomenclatura fitosociológica.

Bupleurum salicifolium R. Brown in Buch de l'archipel Macaronésien: Taxonomie et Evolution

Se ha realizado un estudio anatómico (frutos y hojas) en 24 poblaciones de Bupleurum salicifolium R. Brown in Buch recogidas en las lslas Canarias Occidentales y Madeira, lo que nos ha permitido evidenciar una estructura uniforme de los frutos. Por el contrario, en las hojas se han observado tres tipos de estructuras, así como la existencia de un canal oleoso, cuya presencia o ausencia coincide con la distribución geográfica de la especie en las diferentes islas. Estas observaciones nos han inducido a hacer una nueva propuesta sistemática: B. salicifolium subsp. salicifolium con dos variedades, var. salicifolium (Madeira y Gomera) y var. robustum comb. nova (Gomera), y subsp. aciphyllum (La Palma, Hierro, Tenerife y Gran Canaria).La importancia de cada uno de los tipos de hojas en las diferentes islas nos ha pemitido asimismo proponer un esquema de dispersión de la especie. La existencia de estructuras consideradas como más primitivas, así como la desaparición de las poblaciones diploides, permiten suponer que B. salicifolium es una especie antigua que conserva su número base de origen x = 8 (En francés).

La aplicación estratégica por escenarios en el medio natural. El caso del Nature Outlook 2050 del PBL.

La prospectiva es parte de la planificación estratégica. Es una herramienta habitual en la gestión y dirección de empresas. Algunos países europeos la incluyen dentro de sus trabajos de diseño de las políticas ambientales. La generación de escenarios es una técnica cualitativa de prospectiva apta para los entornos con alta variabilidad y complejidad. El artículo explica el modo de aplicar esta técnica poniendo en paralelo los pasos dados en el proyecto Nature Outlook 2050 que ha desarrollado la agencia de evaluación y prospectiva ambiental de los Países Bajos (PBL).

Una revisión de la Cadena Datos-Información-Conocimiento desde el Pragmatismo de Peirce

La Cadena Datos-Información-Conocimiento (DIC), denominada “Jerarquía de la Información” o “Pirámide del Conocimiento”, es uno de los modelos más importantes en la Gestión de la Información y la Gestión del Conocimiento. Por lo general, la estructuración de la cadena se ha ido definiendo como una arquitectura en la que cada elemento se levanta sobre el elemento inmediatamente inferior; sin embargo no existe un consenso en la definición de los elementos, ni acerca de los procesos que transforman un elemento de un nivel a uno del siguiente nivel. En este artículo se realiza una revisión de la Cadena Datos-Información-Conocimiento examinando las definiciones más relevantes sobre sus elementos y sobre su articulación en la literatura, para sintetizar las acepciones más comunes. Se analizan los elementos de la Cadena DIC desde la semiótica de Peirce; enfoque que nos permite aclarar los significados e identificar las diferencias, las relaciones y los roles que desempeñan en la cadena desde el punto de vista del pragmatismo. Finalmente se propone una definición de la Cadena DIC apoyada en las categorías triádicas de signos y la semiosis ilimitada de Peirce, los niveles de sistemas de signos de Stamper y las metáforas de Zeleny.

Temps et Oralité dans le Conte Oral

This article addresses the question of narrative tense usage in a particular variety of performed oral narration in modern French, i.e. oral storytelling. We examine the narrative tense systems used in both traditional and new storytelling, comparing these with well-attested oral and written patterns and with theoretical models such as Benveniste's, Weinrich's and Revaz's. We examine briefly some of the key functions of the tense alternations attested, again comparing these to patterns in other types of discourse, and conclude by considering the nature of the « orality » in question.

L'Europe et les partis politiques nationaux: Les lecons d'un

European integration remains a 'non-cleavage' in relation to the Lipset-Rokkan model, as it has not produced significant restructurings of national party systems. Yet, while not effecting the terms of interparty competition, Europe has nevertheless come to occupy an increasingly large place in national political debates. Since the early 1990s, Euroscepticisms have taken root, to varying degrees, across the entire continent. This article analyses the rise of these Eurosceptic tendencies, examining the phenomenon in terms of both the Europeanisation of national political life and the wider emergence of forms of protest politics. The analysis demonstrates how European questions have been absorbed into established party structures, while at the same time pointing towards a renewed research agenda which pays greater attention both to the discursive dimension of political life and to the roles played by national parties as European actors.

La ruptura de una economía moral y las deslegitimación de las deudas hipotecarias

In Spain, during the recent housing bubble, purchasing a home seemed the most advantageous strategy to access housing, and there was a wide social consensus about the unavoidability of mortgage indebtedness. However, such consensus has been challenged by the financial and real-estate crisis. The victims of home repossessions have been affected by the transgression of several principles, such as the fair compensation for effort and sacrifice, the prioritisation of basic needs over financial commitments, the possibility of a second chance for over-indebted people, or the State's responsibility to guarantee its citizens' livelihood. Such principles may be understood as part of a moral economy, and their transgression has resulted in the emergence of a social movement, the Plataforma de Afectados por la Hipoteca (PAH), that is questioning the legitimacy of mortgage debts. The article reflects on the extent to which the perception of over-indebtedness and evictions as unfair situations can have an effect on the reproduction of the political-economic system, insofar the latter is perceived as able or unable to repair injustice.

Use of A192621 to provide evidence for involvement of endothelin ET(B)-receptors in endothelin-1-mediated cardiomyocyte hypertrophy.

Increased plasma levels of endothelin-1 correlate with the severity of left ventricular hypertrophy in vivo. The aim of the study was to determine the relative contribution of stimulation of endothelin ETA and endothelin ETB receptors, and the associated activation of protein kinase C, to the hypertrophic response initiated by endothelin-1 in adult rat ventricular cardiomyocytes maintained in culture (24 h). Endothelin-1 (10-7 M) increased the total mass of protein and the incorporation of [14C] phenylalanine into protein to 26% and 25% greater (P

The “re-socialization” of Gypsy women in the literacy courses aimed to the recipients of the Social Integration Revenue Policy of the Region of Madrid

This article studies the gender values that are promoted both in the literacy courses for gypsy women beneficiaries of the Social Integration Revenue Policy of the Region of Madrid and in the events that are organized for this group by public institutions and NGOs. The process of “socialization” that occurs in the educative groups for Gypsy women is focused on constructing an image of what it is to be a “Gypsy modern woman”. Through multiple mechanisms and discursive techniques a specific conception of gender equality is transmitted in these educative spaces. In addition to this, Gypsy women are continually urged to assume certain values and social practices (of gender identity, of "citizenship", of parenting, etc..), while an archetype of "Gypsy Woman" which condenses powerful stereotypes and prejudices about the "Gypsy culture" and the gender relations characteristics of this group is constructed.

Evidence for two endothelin Et(A) receptor subtypes in rabbit arteriolar smooth muscle.

1. Effects of endothelin-1 (Et-1) were studied on membrane currents in choroidal arteriolar smooth muscle by using perforated patch-clamp recordings. 2. Et-1 (10 nM) activated oscillatory Ca(2+)-activated Cl(-)-currents (I(Cl(Ca))) which could not be reversed by washing out. 3. Currents through L-type Ca(2+) channels were resolved in a divalent free medium (I(Ca(L)Na)). Et-1 reduced I(Ca(L)Na) by 75 +/- 7% within 30 s and this effect faded over 5 min, when the depression remained constant. On washing out Et-1, I(Ca(L)Na) almost completely recovered within 10 s. 4. BQ123 (1 microM), a peptide Et(A) receptor blocker, prevented the activation of I(Cl(Ca)), but failed to inhibit I(Cl(Ca)) transients once they had been initiated. In contrast, BQ123 not only prevented but also reversed the inhibition of I(Ca(L)Na) by Et-1. BQ788 (1 microM), an Et(B) receptor antagonist, did not prevent the activation of I(Cl(Ca)) or the inhibition of I(Ca(L)Na) by Et-1. 5. ABT-627 (10 nM), a non-peptide Et(A) receptor antagonist also blocked the activation of I(Cl(Ca)). However, on I(Ca(L)Na), ABT-627 (10 nM) mimicked the action of Et-1 an effect blocked by BQ123 suggesting that ABT-627 acted as an agonist. 6. The data are consistent with choroidal arteriolar smooth muscle cells having two types of Et(A) receptor, one where BQ123 is an antagonist and ABT-627 an agonist, where ligands dissociate freely and this receptor is coupled to inhibition of L-type Ca(2+) channels. In the other, BQ123 and ABT-627 are both antagonists and with Et-1 the receptor converts to a high affinity state producing the classical irreversible activation I(Cl(Ca)).