El cuerpo como objeto de políticas educativas

En este trabajo se presentan algunas ideas, aún en desarrollo, que intentan dar continuidad a indagaciones teórico-metodológicas a propósito de la relación cuerpo-políticas educativas, suponiendo que en esta relación hay elementos constitutivos del orden del saber, del conocimiento y de la educación mirada en su despliegue en términos de política. Si bien el objeto del trabajo no está centrado en el análisis de un documento, gran parte de las ideas desarrolladas han surgido de la exploración sobre el lugar que ocupa el cuerpo en las políticas educativas del Uruguay, especialmente de la lectura del Programa de Educación Primaria para las escuelas urbanas (revisión 1986).

Estrategias de reproducción social en grupos poblacionales que transitan de una economía formal a una economía solidaria : El caso de la Línea Sur de Río Negro en el Mercado de la Estepa 'Quimey Piuké'

Fil: Gallo, Josefina Mahuén. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

El cuerpo poseído como una forma de cuerpo sin órganos

El principal objetivo de este trabajo consiste en relacionar el concepto deleuziano de "cuerpo sin órganos" con el análisis que realiza Foucault, en Los anormales, del cuerpo poseído. Concretamente se intentará mostrar cómo es posible concebir al cuerpo poseído de Foucault como un cuerpo sin órganos deleuziano. El trabajo girará alrededor de tres grandes ejes: el organismo y el campo de intervención; la significancia y el dominio discursivo; la subjetivación y el saber. Finalmente se mencionará a la idea deleuziana de prudencia, entendida como arte común a los tres ejes.

Geochemistry and minerals at DSDP Leg 81 Holes

Three phases of volcanism have been recognized in the lower Paleogene sequence of the southwest Rockall Plateau which are related to the onset of seafloor spreading in the NE Atlantic. The earliest, Phase 1, is marked by a sequence of tholeiitic basalts and hyaloclastites which form the dipping reflector sequence in Edoras Basin. Phase 2 is characterized by tuffs and lapilli tuffs of air-fall origin, ranging in composition from basic to intermediate. They were generated by highly explosive igneous activity due to magma-water interaction, and terminate at the level of a major transgression. Subsequently, volcanism reverted to tholeiitic basalt type, producing the thin tuffs and minor basalt flows of Phase 3. Alteration of the volcanic glass and diagenesis of the tuffs and lapilli tuffs has been considerable in many cases, with a large number of diagenetic mineral phases observed, including smectite, celadonite, analcime, phillipsite, clinoptilolite, mordenite, and calcite. Although calcite is the latest observed diagenetic cement, it nevertheless occurred relatively early, in one case totally preserving basaltic glass from alteration.

El cuerpo como objeto de políticas educativas

En este trabajo se presentan algunas ideas, aún en desarrollo, que intentan dar continuidad a indagaciones teórico-metodológicas a propósito de la relación cuerpo-políticas educativas, suponiendo que en esta relación hay elementos constitutivos del orden del saber, del conocimiento y de la educación mirada en su despliegue en términos de política. Si bien el objeto del trabajo no está centrado en el análisis de un documento, gran parte de las ideas desarrolladas han surgido de la exploración sobre el lugar que ocupa el cuerpo en las políticas educativas del Uruguay, especialmente de la lectura del Programa de Educación Primaria para las escuelas urbanas (revisión 1986).

Spatial compartmentalization of free radical formation and mitochondrial heterogeneity in bivalve gills revealed by live-imaging techniques, supplementary material

Live-imaging techniques (LIT) utilize target-specific fluorescent dyes to visualize biochemical processes using confocal and multiphoton scanning microscopy, which are increasingly employed as non-invasive approach to physiological in-vivo and ex-vivo studies. Here we report application of LIT to bivalve gills for ex-vivo analysis of gill physiology and mapping of reactive oxygen (ROS) and nitrogen (RNS) species formation in the living tissue. Our results indicate that H2O2, HOO. and ONOO- radicals (assessed through C-H2DFFDA staining) are mainly formed within the blood sinus of the filaments and are likely to be produced by hemocytes as defense against invading pathogens. The oxidative damage in these areas is controlled by enhanced CAT (catalase) activities recorded within the filaments. The outermost areas of the ciliated epithelial cells composing the filaments, concentrated the highest mitochondrial densities (MTK Deep Red 633 staining) and the most acidic pH values (as observed with ageladine-a). These mitochondria have low (depolarized) membrane potentials (D psi m) (JC-1 staining), suggesting that the high amounts of ATP required for ciliary beating may be in part produced by non-mitochondrial mechanisms, such as the enzymatic activity of an ATP-regenerating kinase. Nitric oxide (NO, DAF-2DA staining) produced in the region of the peripheral mitochondria may have an effect on mitochondrial electron transport and possibly cause the low membrane potential. High DAF-2DA staining was moreover observed in the muscle cells composing the wall of the blood vessels where NO may be involved in regulating blood vessel diameter. On the ventral bend of the gills, subepithelial mucus glands (SMG) contain large mucous vacuoles showing higher fluorescence intensities for O2.- (DHE staining) than the rest of the tissue. Given the antimicrobial properties of superoxide, release of O2.- into the mucus may help to avoid the development of microbial biofilms on the gill surface. However, cells of the ventral bends are paying a price for this antimicrobial protection, since they show significantly higher oxidative damage, according to the antioxidant enzyme activities and the carbonyl levels, than the rest of the gill tissue. This study provides the first evidence that one single epithelial cell may contain mitochondria with significantly different membrane potentials. Furthermore, we provide new insight into ROS and RNS formation in ex-vivo gill tissues which opens new perspectives for unraveling the different ecophysiological roles of ROS and RNS in multifunctional organs such as gills.