Misiones en el contexto transfronterizo con Paraguay y Brasil. Representaciones identitarias a partir de la memoria construida y difundida. “Pasos” con historia y diversas prácticas sociales cotidianas. 16H317

En relación con la extensión del campo empírico en el que trabajan los investigadores y que a la vez, se corresponde con la residencia en distintos lugares de la frontera, hemos decidido ubicar en forma integrada los ítems 7, 8 y 9 perteneciente a los investigadores, de acuerdo con los avances que fueron realizando. Entendimos que esta modalidad proporcionaba un mejor ordenamiento, en particular para este proyecto. En este sentido dichos ítems se colocan a continuación del punto 9, a diferencia de la directora y co directora que describen los puntos 1 a 5 de la producción del proyecto. A continuación se detallan las actividades realizadas por la directora y co directora en el área Nordeste de la provincia, el trabajo de campo fue realizado en las ciudades de San Antonio y Bernardo de Irigoyen. Entrevistas realizadas en, Septiembre de 2011. San Antonio: Escuela N° 581- Paraje Piñalito Norte, Escuela N° 287 Paraje Giachino, Escuela Agrotécnica San Antonio (EASA) Paraje Forestal,, Estación de POLICIA, Municipalidad: Concejo municipal, Escuela de Frontera N° 612, Escuela N° 844, Gendarmería. Bernardo de Irigoyen: -Escuela de Frontera N° 604, Escuela Bilingüe N° 1, Gendarmería, INTA, Entrevistadas realizadas en Octubre de 2011, Dionisio Cerqueira- Santa Catarin, Área de Control Integrado -ACI-Escuela Dr Theodoureto Carlos de Faría Souto, Barraçao- Paraná, Colegio Estadual, Facultade da Fronteira. San Antonio: Escuela Argentina, Escuela Humberto de Campos, Empresa de molinos Perón-Ferrari S. A. Bernardo de Irigoyen: Escuela de Frontera Nº 604 y Bilingüe Nº 1, Supervisora de la región, Secretario Escolar

Carbon and Sulphur concentrations of sediments from Peru, Oman and Benguela upwelling environments

Abundances of organic carbon, sulfur, and reactive iron in sediments of three upwelling environments (Peru, Oman and Benguela) suggest that organic carbon/reduced sulfur ratios (C/S-ratios) in this category of marine sediments deviate considerably from previously established empirical ratios in normal marine sediments. To clarify the discrepancies, we investigated those components of the diagenetic system that limit the formation of pyrite: sulfate concentrations and reduction rates in pore waters, availability of reactive iron, and the quantity and quality of organic matter. All three limitations are evident in our sample pools. The results suggest that C/S-ratios in recent and fossil marine sediments rich in organic matter may be unsuitable as paleoenvironmental indicators.

Lipids and nitrogen isotopes of deep-water corals

The lipid and organic nitrogen isotopic (delta15N) compositions of two common deep-water corals (Lophelia pertusa and Madrepora oculata) collected from selected locations of the NE Atlantic are compared to the composition of suspended particulate organic matter, in order to determine their principle food source. Initial results suggest that they may feed primarily on zooplankton. This is based on the increased abundances of mono-unsaturated fatty acids and alcohols and the different ratios of the polyunsaturated fatty acids, 22:6/20:5 of the corals when compared to those of the suspended particulate organic matter. There is enrichment in L. pertusa of mono-unsaturated fatty acids and of delta15N relative to M. oculata. It is unclear whether this reflects different feeding strategies or assimilation/storage efficiencies of zooplankton tissue or different metabolism in the two coral species.

Iron (Fe) concentrations and fluxes in TALDICE ice core 0.6 to 314 ky BP

Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and Talos Dome during the deglaciation and early Holocene, attributed to a combination of deglacial activation of dust sources local to Talos Dome and the reorganisation of atmospheric transport pathways with the retreat of the Ross Sea ice shelf. This supports similar findings based on dust particle sizes and fluxes and Rare Earth Element fluxes. We show that Ca and Fe should not be used as quantitative proxies for mineral dust, as they all demonstrate different deglacial trends at Talos Dome and Dome C. Considering that a 20 ppmv decrease in atmospheric CO2 at the coldest part of the last glacial maximum occurs contemporaneously with the period of greatest Fe and dust flux to Antarctica, we confirm that the maximum contribution of aeolian dust deposition to Southern Ocean sequestration of atmospheric CO2 is approximately 20 ppmv.

Silicoflagellates and ebridians from the New Jersey Transect DSDP Leg 93

Well-preserved and diverse silicoflagellate and ebridian populations are found in the lower and middle Eocene sediments of DSDP Site 605 and the upper Miocene sediments of DSDP Site 604. The ebridians outnumber the silicoflagellates in the siliceous interval of Site 605, but are less numerous at Site 604. The abundances of the various taxa are tabulated.

Salud móvil: avenidas innovadoras para mejorar acceso al aborto seguro

Presentación en la 4ta. Conferencia Regional del CLACAI. Reafirmando el legado de Cairo: Aborto legal y seguro. Lima, 21 y 22 de Agosto de 2014

Horizontal profiles of longwave and shortwave radiation components over sea ice near Barrow, Alaska during the 2011 melt

An integrated instrument package for measuring and understanding the surface radiation budget of sea ice is presented, along with results from its first deployment. The setup simultaneously measures broadband fluxes of upwelling and downwelling terrestrial and solar radiation (four components separately), spectral fluxes of incident and reflected solar radiation, and supporting data such as air temperature and humidity, surface temperature, and location (GPS), in addition to photographing the sky and observed surface during each measurement. The instruments are mounted on a small sled, allowing measurements of the radiation budget to be made at many locations in the study area to see the effect of small-scale surface processes on the large-scale radiation budget. Such observations have many applications, from calibration and validation of remote sensing products to improving our understanding of surface processes that affect atmosphere-snow-ice interactions and drive feedbacks, ultimately leading to the potential to improve climate modelling of ice-covered regions of the ocean. The photographs, spectral data, and other observations allow for improved analysis of the broadband data. An example of this is shown by using the observations made during a partly cloudy day, which show erratic variations due to passing clouds, and creating a careful estimate of what the radiation budget along the observed line would have been under uniform sky conditions, clear or overcast. Other data from the setup's first deployment, in June 2011 on fast ice near Point Barrow, Alaska, are also shown; these illustrate the rapid changes of the radiation budget during a cold period that led to refreezing and new snow well into the melt season.