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This article describes a training experience developed within the framework of the national program of teacher training. The primary purpose was to analyze secondary schools in a context of their meanings and orientations. The experience brought together teachers, directors, pedagogical advisers, and preceptors of secondary schools in the city of Villa Mercedes, Argentina. On one hand, we present an analysis of the representations of secondary school constructed by the participating actors, as well as the concerns and problems regarding current school scenarios; and on the other hand, we describe proposals for intervention that the actors delineated to permit educational practices aimed at accompanying the trajectories of students in transformed school cultures. [ABSTRACT FROM AUTHOR]

Abstract: Pseudomonas strains producing antimicrobial secondary metabolites play an important role in the biocontrol of phytopathogenic fungi. In this study, native Pseudomonas spp. isolates were obtained from the rhizosphere, endorhizosphere and bulk soil of maize fields in Córdoba (Argentina) during both the vegetative and reproductive stages of plant growth. However, the diversity based on repetitive-element PCR (rep-PCR) and amplified ribosomal DNA restriction analysis (ARDRA) fingerprinting was not associated with the stage of plant growth. Moreover, the antagonistic activity of the native isolates against phytopathogenic fungi was evaluated in vitro. Several strains inhibited members of the genera Fusarium, Sclerotinia or Sclerotium and this antagonism was related to their ability to produce secondary metabolites. A phylogenetic analysis based on rpoB or 16S rRNA gene sequences confirmed that the isolates DGR22, MGR4 and MGR39 with high biocontrol potential belonged to the genus Pseudomonas. Some native strains of Pseudomonas were also able to synthesise indole acetic acid and to solubilise phosphate, thus possessing potential plant growth-promoting (PGPR) traits, in addition to their antifungal activity. It was possible to establish a relationship between PGPR or biocontrol activity and the phylogeny of the strains. The study allowed the creation of a local collection of indigenous Pseudomonas which could be applied in agriculture to minimise the utilisation of chemical pesticides and fertilisers. [Copyright &y& Elsevier]

Abstract: This paper discusses the ongoing ethnoarchaeological research carried out in Yamana shell middens of Tierra del Fuego. Ethnoarchaeology is used in this research as a tool to improve the archaeological methodology by testing it against anthropological, ethnographical and ethnological sources for achieving more accurate reconstructions of past societies. The ethnographical/ethnological information also is coupled with an experimental approach devised to understand physical and social processes, such as site formation processes and resource use and management. Specifically, this experimental approach was applied to the archaeological sites Túnel VII and Lanashuaia I (Tierra del Fuego, Argentina). [Copyright &y& Elsevier]

This paper deals with the so called public focused policies which arose in Argentina as an answer to the high social cost produced by the application of neoliberal policies. the concept of poverty, as it will be shown, is essential that most public policies justify their existence on trying to solve it. [ABSTRACT FROM AUTHOR]

Human Occupation on the Atlantic Coast of Tierra del Fuego During the Late Holocene We present the results of research undertaken at three archaeological sites, Okon XXI, Teis X and Teis XI, located on the Atlantic coast of Tierra del Fuego (Patagonia, Argentina) and dating to the Late Holocene. Teis X and Teis XI are dome-shape shell middens whereas Okon XXI is a shell lens barely visible from the surface.We hope to identify trends in the use of the landscape based on the analysis of processes of production and consumption as well as their intra-site spatial distributions. The morpho-technical and usewear analyses of lithic assemblages allow us to detect similarities in raw material exploitation and artifact manufacture techniques and differences related to spatial organization and activities distributions. Consequently, a heterogeneous use of the coastal landscape is proposed as well as broad, regional circulation of technological knowledge. [ABSTRACT FROM AUTHOR]

Abstract: Shell middens distributed along the coastal areas of the Beagle Channel (Tierra del Fuego) testify the primary role of marine resources in the successful social dynamic of hunter–gatherer–fisher societies (HGF) in extreme high latitude environmental conditions. Intertidal and subtidal limpet species are frequently identified taxa of these archaeological deposits. We investigated whether shell δ18O of the limpet species Nacella deaurata is a valuable record of local sea surface temperature (SST) and ambient water δ18O (δ18Ow) fluctuations, and in turn can be used to estimate the season of its exploitation by Holocene HGF. Sequential shell δ18O of modern species track seasonal changes of SST and δ18Ow. The comparison of shell δ18O profiles of N. deaurata and Nacella magellanica (a coexisting species) suggests the occurrence of distinct growth rate and physiological adaptations between species. Shell δ18O of zooarchaeological specimens of N. deaurata from Lanashuaia II suggests that animals were exploited predominantly in winter and that experienced similar environmental conditions of present day at ∼1320 years BP. Results also indicate that N. deaurata is a valuable candidate for studying past seasonal changes in SST and δ18Ow in this southernmost part of South America. [Copyright &y& Elsevier]

In this paper we present a current research project that is carried out in the uttermost end of South America. The main aim is to analyze the processes of social aggregation between hunter-gatherers and fisher societies who inhabited the Beagle Channel region (Southern Tierra del Fuego Island, Argentina). For that purpose, we develop an ethnoarchaeological approach in order to generate models and hypothesis to confront against the archaeological record. The methodological framework applied to this case study encompasses several lines of research such us: use-wear analysis, residue analysis and zooarchaeology among others. The final goal is to identify the material correlates of the cooperation activities and to obtain a deeper understanding of social relationships between hunter-gatheres comunities. [ABSTRACT FROM AUTHOR]