Cuerpos en disputa: constructivismo queer y diferencia sexual; Disputing bodies: queer constructivism and sexual difference Sicerone, Daniel Alberto El presente trabajo se inscribe en el debate contemporáneo sobre la corporalidad, entre la perspectiva del constructivismo queer, y por otro a los estudios de la diferencia sexual. Estas dos ópticas teóricas apuestan a una corporalidad claramente antagónica, ya que desde el constructivismo queer se piensa al cuerpo como el topos donde se produce la subjetividad metaforizándolo como un campo de batalla donde intervienen múltiples fuerzas que terminan siendo equivalentes a la subjetividad. En cambio, desde los estudios de la diferencia sexual, en especial la Escuela de Liubliana, el cuerpo es siempre un cuerpo sexuado, límite de toda pretensión omnipotente y fisura que provoca la imposibilidad de un lenguaje total. Se abordarán las principales aristas teóricas de ambas concepciones, así como también las consecuencias de la disputa de la corporalidad.; This work is part of the contemporary debate on corporality, from the perspective of queer constructivism, and on the other, to the studies of sexual difference. These two theoretical optics bet on a clearly antagonistic corporality, since from queer constructivism the body is thought of as the moles where subjectivity occurs metaphorizing it as a battlefield where multiple forces intervene that end up being equivalent to subjectivity. On the other hand, from the studies of sexual difference, especially the Ljubljana School, the body is always a sexed body, the limit of all omnipotent pretense and fissure that causes the impossibility of a total language. The main theoretical edges of both conceptions will be addressed, as well as the consequences of the corporality dispute.

Republicanismo em questão: quatro distâncias conceituais entre as teorias democráticas de Philip Pettit e Jacques Rancière; El republicanismo en cuestión: cuatro distancias conceptuales entre las teorías democráticas de Philip Pettit y Jacques Rancière Olivares, Nicolàs Emanuel Neste artigo analisaremos comparativamente duas influentes propostas teóricas democráticas contemporâneas. Em primeiro lugar, reconstruiremos os principais pressupostos normativos da teoria republicana representativa de P. Pettit. Em segundo lugar, apresentaremos as bases filosóficas da teoria democrática radical de J. Rancière. Terceiro, explicaremos quatro distâncias conceituais específicas existentes entre as duas teorias políticas, que enfatizam suas definições dos seguintes termos políticos: republicanismo, participação cidadã, não dominação e liberalismo. Em quarto lugar, apresentaremos razões em defesa de uma hipótese exploratória específica, segundo a qual o contraste de ambas teorias nos permite identificar objeções bem fundamentadas ao modelo dual democrático defendido por P. Pettit e à definição de republicanismo utilizada por J. Rancière, fornecendo, assim, argumentos em defesa de uma perspectiva republicana participativa.; En este artículo analizaremos comparativamente dos influyentes propuestas teóricas democráticas contemporáneas. Primero, reconstruiremos los principales supuestos normativos de la teoría republicana representativa de P. Pettit. En segundo lugar, presentaremos las bases filosóficas de la teoría democrática radical de J. Rancière. En tercer lugar, explicaremos cuatro distancias conceptuales específicas entre dichas dos teorías, las cuales enfatizan en sus definiciones de los siguientes términos políticos: republicanismo, participación ciudadana, no dominación y liberalismo. En cuarto lugar, presentaremos razones en defensa de una hipótesis exploratoria concreta, según la cual el contraste de ambas teorías permite identificar objeciones fundadas al modelo democrático dual defendido por P. Pettit y a la definición de republicanismo utilizada por J. Rancière, proporcionando, así, argumentos en defensa de una perspectiva republicana participativa.

Planificación de los cuidados en el final de la vida: Perspectivas de profesionales de oncología y cuidados paliativos; End-of-life care planning: Oncologist and palliative care professionals perspectives; Planejamento dos cuidados em fim de vida: Perspectivas de oncologistas e profissionais de cuidados paliativos Macchi, Marina J.; Pérez, Marisa del Valle; Alonso, Juan Pedro El artículo aborda la perspectiva de profesionales de oncología y cuidados paliativos de Argentina sobre la planificación anticipada de los cuidados en el final de la vida de pacientes con enfermedades oncológicas avanzadas. A partir de un diseño de investigación cualitativa, basado en entrevistas semi-estructuradas con profesionales de diferentes disciplinas, se analizaron las dificultades para la participación de los y las pacientes en el proceso de toma de decisiones y en los procesos de consentimiento informado en torno a los cuidados en el final de la vida. Pese a valorar la planificación anticipada del cuidado e instrumentos como las directivas anticipadas, se identifican barreras para la implementación de estas prácticas. La falta de herramientas comunicacionales para abordar este tipo de conversaciones con los pacientes, el ocultamiento de la información sobre el diagnóstico y/o el pronóstico de la enfermedad, la falta de articulación entre equipos que realizan el seguimiento de pacientes con enfermedad avanzada, y la resistencia de familiares y pacientes, limitan los márgenes de decisión y consentimiento por parte de los pacientes.; The article addresses the perspective of oncologist and palliative care professionals of Argentina on the advance end of life care planning for patients with advanced cancer. Based on semi-structured interviews with professionals from different disciplines, the paper explores barriers for the patient participation in the decision-making process in end of life care. Despite the acceptance of advance care planning and instruments such as advance directives, barriers to the implementation of these practices are identified. The lack of communication skills to deal with this type of conversation with patients, the concealment of information on the diagnosis and prognosis of the disease, the lack of coordination between teams that keep track of patients with advanced disease, and the resistance from relatives and patients, limit the margins of decision and consent by patients.; O artigo aborda a perspectiva dos profissionais de oncologia e cuidados paliativos na Argentina sobre o planejamento antecipado dos cuidados de fim de vida para pacientes com doenças oncológicas avançadas. Partindo de um desenho de pesquisa qualitativa, com base em entrevistas semiestruturadas com profissionais de diferentes disciplinas, o artigo analisa as dificuldades para a participação dos pacientes no processo de tomada de decisão e nos processos de consentimento informado em torno aos cuidados de fim de vida. Apesar de valorizar o planejamento do cuidado antecipado e instrumentos como as diretrizes antecipadas, identificam-se barreiras para a implantação dessas práticas. A falta de instrumentos de comunicação para atender esse tipo de conversa com os pacientes, o encobrimento do diagnóstico e / ou prognóstico da doença, a falta de articulação entre as equipes que acompanham os pacientes com doença avançada e a resistência dos familiares e pacientes, limitam as margens de decisão e consentimento por parte dos pacientes.

Role of galectin-glycan circuits in reproduction: from healthy pregnancy to preterm birth (PTB) Blois, Sandra M.; Verlohren, Stefan; Wu, Gang; Clark, Gary; Dell, Anne; Haslam, Stuart M.; Barrientos, Gabriela Laura Growing evidence suggests that galectins, an evolutionarily conserved family of glycan-binding proteins, fulfill key roles in pregnancy including blastocyst implantation, maternal-fetal immune tolerance, placental development, and maternal vascular expansion, thereby establishing a healthy environment for the growing fetus. In this review, we comprehensively present the function of galectins in shaping cellular circuits that characterize a healthy pregnancy. We describe the current understanding of galectins in term and preterm labor and discuss how the galectin-glycan circuits contribute to key immunological pathways sustaining maternal tolerance and preventing microbial infections. A deeper understanding of the glycoimmune pathways regulating early events in preterm birth could offer the broader translational potential for the treatment of this devastating syndrome.

Cambios en la Televisión Pública argentina; Changes in argentine Public Television Heram, Yamila Este trabajo parte del interés por reflexionar en torno a la Televisión Pública argentina, entendiendo que es el medio que puede, debe y tiene los recursos necesarios para proponer otro tipo de programación que sepa reunir aspectos vinculados a lo local y lo regional, que ofrezca nuevas propuestas de ficción, que incluya una mayor diversidad de representaciones, que se preocupe por obtener una audiencia más amplia, que promueva debates y una pluralidad informativa. En objetivo es realizar un análisis comparativo de la grilla de programación durante la gestión del macrismo para observar tendencias, cambios y continuidades en la propuesta de la emisora en dos períodos: marzo y abril de 2016 (al inicio de la gestión) y un segundo período que es marzo y abril de 2019. A los fines del análisis se recurre a una amplia literatura proveniente de la economía política de la comunicación que permite contextualizar y comprender el estado actual de la emisora. Se toma una muestra acotada que funciona como “caso testigo” y permite comparar y analizar la programación. Se establecen diversos ejes de análisis: promedio semanal de tiempo de emisión por contenidos referenciales, ficcionales e híbridos; géneros que predominan en cada uno de ellos; programación del prime time, y país de origen del producto transmitido. La información obtenida es abordada desde un análisis cualitativo para identificar invariantes, constantes que solo son posible en un análisis cultural de la oferta televisiva. Entre las principales conclusiones nos interesa destacar una palabra –tensión– que sintetiza el estado de situación de la emisora, hacemos referencia a: géneros referenciales diversos en el horario del prime time y un nivel de audiencia de los más bajos; mayor audiencia durante la gestión anterior y una pluralidad informativa cuestionada; mayor emisión de productos locales y disminución de inversión en los medios públicos.; This work starts from the interest in reflecting on argentine Public Television, understanding that it is the medium that can, should and has the necessary resources to propose another type of programming that knows how to bring together aspects related to the local and the regional, that offers new fictional proposals that include a greater diversity of representations, that are concerned with obtaining a wider audience, that promote debates and a plurality of information. The objective is to carry out a comparative analysis of the programming grid during the management of the macrismo to observe trends, changes and continuities in the station's proposal in two periods: March and April 2016 (at the beginning of the management) and a second period which is March and April 2019. For the purposes of the analysis, a broad literature from the political economy of communication is used, which allows contextualizing and understanding the current state of the station. A bounded sample is taken that functions as a "control case" and allows the programming to be compared and analyzed. Various analysis axes are established: weekly average of broadcasting time by referential, functional and hybrid content; genres that predominate in each of them; prime time programming, and country of origin of the transmitted product. The information obtained is approached from a qualitative analysis to identify invariants, constants that are only possible in a cultural analysis of the television offer. Among the main conclusions we are interested in highlighting a word -voltage- that synthesizes the state of the station, we refer to: different referential genres in prime time and a low audience level; greater audience during the previous administration and a questioned plurality of information; higher emission of local products and decreased investment in public media.

Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe Biancari, Lucio; Aguiar, Martin Roberto; Cipriotti, Pablo Ariel Bare soil is an idiosyncratic and important feature of arid ecosystems that can be affected by human land use such as domestic grazing intensification. Here we focused on the study of individual bare soil areas (BSA) and their long-term dynamics using DINVEG (spatially-explicit simulation model). In Patagonian rangelands we photographed BSA in grazed and ungrazed stands (n = 50). Compared with exclosure, grazing increased the size of the BSAs (17%, p < 0.05) and produced less irregular forms (13%, p < 0.05). The number of plants that delimit BSAs were not different (~9), but under grazing the sum of spaces among plants (BSA opening) was 15% higher than in exclosure (p < 0.05). The difference in wind speed (center-edge of the BSA) increased 70% under grazing. Wind difference was poorly correlated with the BSAs structure variables. Simulations (200 years) with DINVEG indicated that grazing decreased the likelihood of BSAs being colonized by grasses and increased the proportion of bare soil cells. Our study suggests that in these Patagonian steppes domestic grazing promotes structural changes in individual BSA and in the transition to grass covered patches. Changes in wind speed may result from grazing effect at the whole vegetation mosaic since BSA features are not enough to explain differences.

El concepto de estrategia y la Nueva Etnohistoria; The concept of strategy and the Nueva Etnohistoria Ramos, María Alejandra; Chiappe, Carlos María En este artículo realizamos una revisión del uso del concepto de estrategia en las ciencias sociales, en particular en el campo de la etnohistoria andina. Nos centramos en la fase denominada Nueva Etnohistoria (1980 en adelante), momento de consolidación transcontinental de este campo interdisciplinar. Las fuentes de información empleadas consisten en publicaciones colectivas de relevancia y documentos inéditos relativos a la organización del Primer Congreso Internacional de Etnohistoria. Con base en ellas identificamos los sentidos asociados al concepto de estrategia y reconstruimos los debates que su aplicación suscitó, los cuales están ligados a problemáticas científicas vigentes. A partir de este recorrido fundamentamos la necesidad de reactualizar la revisión crítica del concepto bajo análisis.; In this article we review the use of the concept of strategy in the social sciences in particular in the field of Andean Ethnohistory. We focus on the phase called Nueva Etnohistoria (1980 and later), a moment of transcontinental consolidation of this interdisciplinary field. The sources of information used in this study consist of relevant collective publications and unpublished documents related to the organization of the I International Congress of Ethnohistory. With respect to these, we identify the meanings associated with the concept of strategy and reconstruct the debates that arise in its application, which are linked to current problems in the social sciences. Based on the foregoing, we propose the need to update the critical review of the concept of strategy.

WRKY22 and WRKY25 transcription factors are positive regulators of defense responses in Nicotiana benthamiana Ramos, Romina Nahir; Martin, Gregory B.; Pombo, Marina Alejandra; Rosli, Hernan Guillermo Plants defend themselves against pathogens using a two-layered immune system. Pattern-triggered immunity (PTI) can be activated upon recognition of epitopes from fagellin including fg22. Pseudomonas syringae pv. tomato (Pst) delivers efector proteins into the plant cell to promote host susceptibility. However, some plants express resistance (R) proteins that recognize specifc efectors leading to the activation of efector-triggered immunity (ETI). Resistant tomato lines such as Rio Grande-PtoR (RG-PtoR) recognize two Pst efectors, AvrPto and AvrPtoB, and activate ETI through the Pto/Prf protein complex. Using RNA-seq, we identifed two tomato WRKY transcription factor genes, SlWRKY22 and SlWRKY25, whose expression is increased during Pst-induced ETI. Silencing of the WRKY25/22 orthologous genes in Nicotiana benthamiana led to a delay in programmed cell death normally associated with AvrPto recognition or several non-bacterial efector/R protein pairs. An increase in disease symptoms was observed in silenced plants infltrated with Pseudomonas syringae pv. tabaci expressing AvrPto or HopQ1-1. Expression of both tomato WRKY genes is also induced upon treatment with fg22 and callose deposition and cell death suppression assays in WRKY25/22-silenced N. benthamiana plants supported their involvement in PTI. Our results reveal an important role for two WRKYs as positive regulators of plant immunity against bacterial and potentially non-bacterial pathogens.

Respiratory allergy control by probiotic fermented milk intake: A mouse model from weaning to maturity Velez, Eva Maria del Mar; Weil, R.; Perdigon, Gabriela del Valle; Maldonado Galdeano, María Carolina This study is based on our previous research showing that commercial probiotic fermented milk (PFM) intake mitigates respiratory allergy development to ovalbumin (OVA) in adult mice (6-weeks old) increasing specific immunoglobulin (Ig)G2a and interferon (IFN)-γ rather than IgE. The aim was to determine if PFM exerts a protective effect when an allergy model is induced 5 days after weaning and whether the mechanisms involved are similar to those previously reported. Before inducing allergy, a group of 21-day old BALB/c mice received PFM for 10 days to analyse the impact on intestinal epithelial cells (IECs) activation. Two more groups received PFM for 5 days and were sensitised with OVA; only one group continued taking PFM until the end of the experiment. Sensitisation scheme: 3 OVA injections 1% in phosphate buffered saline (PBS) plus 7 days OVA aerosol exposure and re-stimulus 15 days later. The contents of specificIgE, IgG, total-secretory-IgA and Th1/Th2 balance in serum, bronchoalveolar lavage (BAL) and gut were measured at 7 and 15 days post-sensitisation (dPS) and 2 days post-re-stimulus (2dPR). Treg cells in lungs were also quantified. Results were compared with normal and sensitised controls. PFM induced mild activation of IECs increasing monocyte chemoattractant protein-1 (MCP-1 or CCL2) and interleukin (IL)-6 production. In sensitised mice, PFM controlled the response inducing IgG rather than IgE at 7 and 15-dPS and 2dPR (60 days old). Th1-balance (IFN-γ) was favoured by PFM in lungs at 7 dPS with low levels of IL-10 released to regulate the response. Total-S-IgA increased in lungs and gut; however, PFM intake did not affect Treg cells in lungs. PFM maintains controlled stimulation of the immune cells involved in Th1 response, favouring IgG at the respiratory mucosal site. Although the effect was not as strong as that reported previously, PFM promoted maturation and activation of gut immune cells preserving intestinal homeostasis and lung immune response.

MicroPIXE analysis of removal of aqueous U(VI) by S. intermedia and P. stratiotes in the presence of Th(IV) de la Fourniere, Emanuel María; Vega, Nahuel Agustín; Müller, Nahuel Agustín; Debray, Mario Ernesto In this work, Spirodela intermedia and Pistia stratiotes, autochthonous floating macrophytes, were used to remove aqueous UO22+ (1 and 10 mg.L−1) under laboratory conditions. The influence of Th4+(1 mg.L−1) was studied for the highest concentration of U(VI). All the parameters of the bioremediation process, bioconcentration factors (BCFs) in roots and leaves and translocation factors (TFs), were achieved by microPIXE quantification. This analysis was carried out using a 50-MeV 16O5+ beam with the aid of the heavy-ion microprobe at the TANDAR Laboratory in Buenos Aires. High resolution 2D maps of the in vivo elemental distribution in macrophytes for different conditions were obtained. Both plants have the ability to accumulate a large amount of U(VI) yielding BCFs > 500. Only S. intermedia can additionally uptake Th(IV) reaching a high BCF (>300 at 96 h) but the plant does not survive; Th was detected within the chlorenchyma ([Th] ≅ 30 µg.g−1).

Global changes in crop diversity: Trade rather than production enriches supply Aguiar, Sebastián; Texeira González, Marcos Alexis; Garibaldi, Lucas Alejandro; Jobbagy Gampel, Esteban Gabriel Over the past decades, the choices of farmers and societies regarding what to grow and eat are being reshaped drastically, as suggested by the diversification of crop supply within countries and its simultaneous homogenization across them. Such a trend could be supported by parallel shifts in production (i.e. diversification within countries, homogenization across countries) or by the growing redistribution introduced by international trade which can even mask reductions in production diversity (i.e. specialization) within countries. Here we assessed the spatial and temporal trends in crop production, exports, imports, and supply diversity based on data from the Food and Agriculture Organization (FAO) for 152 countries and 49 crops from 1961 to 2013. Within countries, the diversity of crop supply increased at a faster rate than the diversity of production, which grew only slightly. Both were surpassed by the diversification of trade, which, within countries, involved a much faster diversity growth of imports compared to exports. Across countries, crop production homogenized at slower rates than crop supply, indicating that crop trade was important for explaining this decoupling. Mirroring country-based analyses, a crop-perspective indicates that crops are becoming more geographically ubiquitous for all the components of the food balance. However, this pattern had important exceptions, like oil palm which has increased its production concentrating in a few specialized countries. We evaluate our results in the context of the multiple social-ecological trade-offs related to international trade and the resilience of the global food system.

Challenging population dynamics models with new data: how accurate were our inferences?; Desa ando los modelos de dinámica de poblaciones con nuevos datos: ¿Qué tan precisas fueron nuestras inferencias? Andreo, Verónica Carolina; Lima, Mauricio; Polop, Jaime Jose; Provensal, María Cecilia Dada la falta de datos adicionales, muchos estudios de dinámica de poblaciones y de ecología en general no muestran el poder predictivo de los modelos que proponen. Mientras tanto, esto es básico para el desarrollo de la ciencia en tanto que permite dar o no soporte a nuestras hipótesis. En este trabajo, utilizamos 7 años de datos nuevos para evaluar las predicciones de distintos modelos de dinámica poblacional de dos especies de roedores simpátricos en los agro-ecosistemas del centro de Argentina. Esto nos ha permitido dar mayor soporte a la hipótesis de competencia intra-especí ca como único mecanismo regulador de las abundancias de Akodon azarae y desa ar nuestras inferencias previas sobre la dinámica de Calomys venustus. Nuestro ejercicio de predicción destaca la relevancia de confrontar resultados anteriores con nuevos datos para aumentar o disminuir el apoyo a las inferencias previas y mejorar nuestra comprensión de la dinámica de las poblaciones que estudiamos.; Given the lack of further data, many studies in population dynamics and in ecology in general fail to demonstrate the forecasting or predictive power of the models they propose. Meanwhile, this is basic to scienti c research growth in that it allows to verify/refute our working hypotheses. In this work, we used 7 years of new data to test population dynamics models’ predictions for two sympatric rodent species in agro-ecosystems of central Argentina. This has allowed us to give further support to the hypothesis of intra-speci c competition as the only regulatory mechanism of Akodon azarae’s abundances and challenge our previous inferences regarding Calomys venustus’ dynamics. Our forecasting exercise highlights the relevance of confronting former results with new data to increase or decrease support for previous inferences and improve our understanding of population dynamics.

Application of high pressure-assisted infusion treatment to mango pieces: Effect on quality properties Perdomo Lamilla, Carolina; Vaudagna, Sergio Ramon; Cap, Mariana; Rodriguez, Anabel The aim of this study was to evaluate the effect of the high pressure-assisted infusion treatment on the quality properties of mango cubes. Factors studied were: sorbitol concentration (20°Brix, 40°Brix, 60°Brix), calcium lactate concentration (0%w/w, 1%w/w, 2% w/w) and pressure level (0.1 MPa, 300 MPa, 600 MPa). Results showed that process factors not only improved the mass transfer during the infusion process but also the solid gain was restricted by the incorporation of the calcium salt. The synergetic effect of pressure level and the addition of calcium salt preserved the mechanical properties. The tonality and chromaticity parameters of mango cubes were preserved by the antagonistic effect of the pressure level and sorbitol concentration. All microbiological counts were below the detection level. The most effective process was 600 MPa-60°Brix-2% w/w since it produced an 81.9% of inactivation of the polyphenol oxidase enzyme, which will allow preserving the final product. Industrial relevance: The sensory and nutritional properties of fruit-based products are the main factor, determining the acceptance by consumers. During processing, these properties can be affected by different process factors, so there is a great interest in developing new processing methods that would enable the preservation of the quality properties of the fresh fruit. The present study showed that the application of the high pressure-assisted infusion process could be a promising alternative to preserve the quality of mango cubes. Therefore, based on the results, criteria for commercial production of high-quality mango cubes conserved in a sorbitol solution with adequate safety requirements could be established.

Role of distal cerebral vasculature in vessel constriction after aneurysm treatment with flow diverter stents Narata, Ana Paula; Moura, Fernando; Larrabide, Ignacio; Chapot, René; Cognard, Christophe; Januel, Anne-Christine; Velasco, Stéphane; Bouakaz, Ayache; Patat, Frederic; Marzo, Alberto Background Treatment of intracranial aneurysms with flow diverter stent (FDS) procedures can lead to caliber changes of jailed vessels. The reason some branches remain unchanged and others are affected by narrowing remains unknown. Objective To investigate the influence of resistance to flow from distal vasculature on stent-induced hemodynamic modifications affecting bifurcating vessels. Materials and methods Radiological images and demographic data were acquired for 142 aneurysms treated with a FDS. Vascular resistance was estimated from patient-specific anatomic data. Correlation analysis was used to identify correspondence between anatomic data and clinical outcome. Computational Fluid Dynamics was performed on a typical patient-specific model to evaluate the influence of FDS on flow. Relevant hemodynamic variables along the bifurcating vessels were quantitatively analyzed and validated with in vitro data obtained using power Doppler ultrasound. Results Statistical analysis showed a correlation between clinical outcome and FDS resistance to flow considering overall jailed vessel vascular resistance (r=0.5, P<0.001). Computational predictions of blood flow showed that hemodynamics is minimally affected by FDS treatment in the ophthalmic artery. Conclusions Jailed vessels are affected by narrowing when resistance to flow from the FDS constitutes a larger proportion of the overall vessel resistance to flow. This knowledge may contribute to better understanding of intracranial hemodynamics after a FDS procedure and reinforce indications for flow diversion in the treatment of intracranial aneurysms.

Vulnerables y empoderadas a la hora de parir: Análisis multidimensional de la vulnerabilidad en la atención obstétrica; Vulnerable and empowered in childbirth: Multidimensional analysis of vulnerability in obstetric care Castrillo, Belén OBJETIVO. Tomando en cuenta los dos sentidos clásicos de la vulnerabilidad en ciencias sociales —el antropológico y el social—, el propósito de este artículo es introducir la conceptualización butleriana de la vulnerabilidad —entendida como acto de poder y resistencia— como herramienta teóricometodológica clave para entender y analizar las experiencias perinatales de las mujeres. MATERIAL Y MÉTODO. La tesis de referencia analizó diversas instancias de la atención médica del proceso perinatal en la ciudad de La Plata, con técnicas metodológicas complementarias: observaciones con distintos grados de participación en cursos de preparto y salas de espera; entrevistas en profundidad a mujeresmadres, varones-padres y profesionales de la salud; y un extenso corpus de charlas informales y presencias en el campo, entre 2013 y 2019. RESULTADOS. En el trabajo de reinterpretación del corpus de datos, se advirtieron tres sentidos principales en que emergió la vulnerabilidad de las mujeres asociadas a la atención obstétrica de sus procesos reproductivos: a) Vulnerabilidad frente a la decisión médica (pérdida de autonomía); b) Vulnerabilidad potenciada por otras vulnerabilidades asociadas; c) Vulnerabilidad y resistencia, empoderamiento. CONCLUSIONES. A partir del cruce entre una lente conceptual novedosa para entender la vulnerabilidad, analicé experiencias de partos de mujeres platenses. Advertí que en estas experiencias y teniendo en cuenta sus propias evaluaciones de atención en distintos ámbitos —público, privado o domicilio— es posible rastrear tres tipos de vulnerabilidad: a) a la decisión médica —pérdida de autonomía—; b) potenciada por otras vulnerabilidades; y, c) como catalizadora del empoderamiento.; OBJECTIVE. Taking into account the two classic senses of vulnerability in the social sciences—the anthropological and the social—the purpose of this article is to introduce the Butlerian conceptualization of vulnerability—understood as an act of power and resistance—as a key theoretical-methodological tool for understanding and analyzing women’s perinatal experiences. MATERIAL AND METHOD. The reference thesis analyzed various instances of medical care of the perinatal process in the city of La Plata, with complementary methodological techniques: observations with different degrees of participation in prepartum courses and waiting rooms; in-depth interviews with women-mothers, men-fathers, and health professionals; and an extensive corpus of informal talks and presences in the field, between 2013 and 2019. RESULTS. In the reinterpretation of the data corpus, three main senses were noted in which the vulnerability of women associated with obstetric care of their reproductive processes emerged: a) Vulnerability to medical decision (loss of autonomy); b) Vulnerability enhanced by other associated vulnerabilities; c) Vulnerability and resistance, empowerment. CONCLUSIONS. Starting from the cross between a new conceptual lens to understand vulnerability, I analyzed birth experiences of women from La Plata. I warned that in these experiences and taking into account their own evaluations of care in different areas -public, private or home-it is possible to trace three types of vulnerability: a) to the medical decision—loss of autonomy—; b) powered by other vulnerabilities; and, c) as a catalyst for empowerment.

Application of a novel rGO-CuFeS2 composite catalyst conjugated to microwave irradiation for ultra-fast real textile wastewater treatment Vieira, Yasmin; Ceretta, Maria Belen; Foletto, Edson Luiz; Wolski, Erika Alejandra; Silvestri, Siara The disposal of wastewater containing large amounts of dyes is a public health and environmental problem, due to its toxicity into the aquatic biota, the reduction in sunlight penetration, which consequently interference in photosynthetic activity. In the present study a new composite, based on the heterojunction of reduced graphene oxide (rGO) and chalcopyrite (CuFeS2), was developed to treat a real textile wastewater (RW). The efficiency of the composite assisted by microwave irradiation was evaluated to catalyze the decolorization and degradation of RW containing a high concentration of the azo Direct Black 22 (DB22). A small amount (0.5 w/w%) of rGO on CuFeS2 was enough to uplift the efficiency of decolorization to 74 % of DB22 and 97 % TOC in the RW, only in the first min of treatment, and 97 % and 99 %, respectively, at 6 min. The improvement in catalytic activity can be attributed to the dipolar polarization effect, hot spots and the generation of hydroxyl radicals. Additionally, a synergistic effect between the composite and microwave irradiation, assisted by hydrogen peroxide, reduced the RW phytotoxicity, improving the radicle length of Lactuca sativa three times (from 0.87 cm to 2.65 cm with the application of a single minute of treatment). The reduction in phytotoxicity led to an increase in the germination percentage from 36 % to 53 %. Finally, the use of MW irradiation coupled to a novel rGO-CuFeS2 composite, in presence of H2O2 under acid medium, provides a feasible and highly rapid method to treat RW, reducing its phytotoxicity. Capsule: A novel rGO-CuFeS2 catalyst was developed and applied together with microwave irradiation for an ultra-fast degradation treatment (6 min) in real textile wastewater.

Los poblados históricos del área de frontera en la naciente del río Mendoza: Un testimonio de la modernidad finisecular (1890-1950); The historical villages of Mendoza river border head area: A testimony of finisecular modernity (1890-1950) Bianchi Palomares, Pablo Federico Ricardo; Villalobos, Ana María Los pueblos de montaña que jalonan el alto valle del río Mendoza, en la provincia homónima del centro oeste de Argentina, son testimonio de la modernidad finisecular desde su aparición en el contexto de implantación del Ferrocarril Trasandino, a fines del siglo XIX. Su presencia en el itinerario cordillerano fue fundamental dado que facilitaron el comercio y el transporte, en el tramo más occidental de la ruta que vincula Buenos Aires con las ciudades de Santiago y Valparaíso del vecino país de Chile. Al estar emplazados en estrecha relación con el río Mendoza, y en un soporte geográfico de características singulares; actuaron como estructurantes del territorio, con una disposición sistémica que definió al territorio fronterizo hasta mediados del siglo XX. El problema que motiva este trabajo se basa en la detección de una vacancia referida a la lectura integral de bienes culturales, ligados al tramo superior del río Mendoza. Los aportes efectuados hasta el momento son fragmentarios, sobre todo en relación con los bienes que consolidaron el territorio de la cordillera mendocina; a nivel turístico, vial y de servicios. Mediante el análisis descriptivo-explicativo de cuatro poblados históricos se pretende llenar el vacío detectado y comprender el rol fundamental que desempeñaron en el proceso de ocupación paulatina del territorio de alta montaña, iniciado en el tiempo de la modernidad.; The mountain towns that mark the high valley of the Mendoza River, in the homonymous province of central west Argentina, are testimony of the Turn of the century modernity, since its appearance in the context of the implantation of the Trasandino Railway, at the end of the 19th century. Their presence in the mountain itinerary was fundamental since they facilitated trade and transport, in the westernmost section of the route that linked Buenos Aires with the cities of Santiago and Valparaíso in the neighboring country of Chile. Being located in close relationship with the Mendoza River, and in a geographical support of unique characteristics; they acted as structuring of the territory, with a systemic disposition that defined the border territory until the middle of the 20th century. The problem that motivates this work is based on the detection of a vacancy referring to the comprehensive reading of cultural assets, linked to the upper section of the Mendoza River. The contributions which were made recently are fragmentary, especially in relation to the assets that consolidated the territory of the Mendoza high mountain area; at Tourism-, Road- and ServiceLevels. With the help of the descriptive-explanatory analysis of four historical towns, the study seeks to fill an inclusive approximation and to help understanding the fundamental role they played in the process of gradual occupation of the high mountain territory, which began in the modernity

An application of a solar-type dynamo model for ϵ Eridani Buccino, Andrea Paola; Sraibman, Laura; Olivar, Pablo Martín; Minotti, Fernando Oscar During the last decade, the relation between activity cycle periods and stellar parameters has received special attention. The construction of reliable registries of activity reveals that solar-type stars exhibit activity cycles with periods from few years to decades and, in some cases, long and short activity cycles coexist suggesting that two dynamos could operate in these stars. In particular, ϵ Eridani is an active young K2V star (0.8 Gyr), which exhibits short and long-term chromospheric cycles of ∼3 and ∼13-yr periods. Additionally, between 1985 and 1992, the star went through a broad activity minimum, similar to the solar Maunder Minimum state. Motivated by these results, we found in ϵ Eridani a great opportunity to test the dynamo theory. Based on the model developed in Sraibman & Minotti, in this work we built a non-linear axisymmetric dynamo for ϵ Eridani. The time series of the simulated magnetic field components near the surface integrated in all the stellar disc exhibits both the long and short activity cycles with periods similar to the ones detected from observations and also time intervals of low activity that could be associated with the broad Minimum. The short activity cycle associated with the magnetic reversal could be explained by the differential rotation, while the long cycle is associated with the meridional mass flows induced by the Lorentz force. In this way, we show that a single non-linear dynamo model derived from first principles with accurate stellar parameters could reproduce coexisting activity cycles.

Decidualization Process Induces Maternal Monocytes to Tolerogenic IL-10-Producing Dendritic Cells (DC-10) Gori, María Soledad; Soczewski, Elizabeth Victoria; Fernández, Laura del Carmen; Grasso, Esteban Nicolas; Gallino, Lucila; Merech, Fátima Isabel; Colado, Ana; Borge, Mercedes; Perez Leiros, Claudia; Salamone, Gabriela Veronica; Ramhorst, Rosanna Elizabeth Decidualization is a process that involves phenotypic and functional changes of endometrial stromal cells to sustain endometrial receptivity and the participation of immunoregulatory factors to maintain immune homeostasis. In this context, tolerogenic dendritic cells (DCs) can induce regulatory T cells, which are essential to manage the pro- to anti-inflammatory transition during embryo implantation. Recently, Myeloid Regulatory Cells (MRCs) were proposed as immunosuppressants and tolerance-inducer cells, including the DC-10 subset. This novel and distinctive subset has the ability to produce IL-10 and to induce type 1 regulatory T cells (Tr1) through an HLA-G pathway. Here we focus on the impact of the decidualization process in conditioning peripheral monocytes to MRCs and the DC-10 subset, and their ability to induce regulatory T cells. An in vitro model of decidualization with the human endometrial stromal cell line (HESC), decidualized by medroxyprogesterone and dibutyryl-cAMP was used. Monocytes isolated from peripheral blood mononuclear cells from healthy women were cultured with rhGM-CSF + rhIL-4 and then, the effect of conditioned media from decidualized (Dec-CM) and non-decidualized cells (Non-dec-CM) was tested on monocyte cultures. We found that Dec-CM inhibited the differentiation to the CD1a+CD14– immature DC profile in a concentration-dependent manner. Dec-CM also significantly increased the frequency of CD83+CD86low and HLA-DR+ cells in the monocyte-derived culture. These markers, associated with the increased production of IL-10, are consistent with a MRCs tolerogenic profile. Interestingly, Dec-CM treatment displayed a higher expression of the characteristic markers of the tolerogenic DC-10 subset, HLA-G and ILT2/CD85j; while this modulation was not observed in cultures treated with Non-dec-CM. Moreover, when monocyte cultures with Dec-CM were challenged with LPS, they sustained a higher IL-10 production and prevented the increase of CD83, CD86, IL-12p70, and TNF-α expression. Finally, the DC-10 subset was able to induce a CD4+HLA-G+ regulatory T cells subset. These results suggest that the decidualization process might induce different subsets of MRCs, like DC-10, able to induce regulatory T cells as a novel CD4+HLA-G+ subset which might play an immunoregulatory role in embryo implantation.

Analysis of irradiated Argentinean fetal bovine serum for adventitious agents Pecora, Andrea; Pérez López, Jorgelina; Jordán, Maximiliano Jesús; Franco, Lautaro Nahuel; Politzki, Romina; Ruiz, Vanesa; Alvarez, Irene Fetal bovine serum (FBS) used in cell culture may be contaminated with adventitious agents, which can affect the production of biologicals and the results of clinical laboratory tests. We carried out a retrospective study to determine the incidence of adventitious agent contamination of Argentinean irradiated FBS dating from 2015 to 2019. We analyzed FBS batches for mycoplasma and adventitious viruses (bovine pestiviruses, bovine adenovirus, bluetongue virus, bovine parainfluenza virus 3, rabies virus, bovine parvovirus, bovine herpesvirus 1, bovine respiratory syncytial virus, and reovirus). Cell passages followed by direct immunofluorescence were carried out to check viability of the mentioned adventitious agents. Also, molecular detection of mycoplasma and pestiviruses was performed on the FBS samples. The presence of neutralizing antibodies against pestiviruses was determined. Molecular analyses indicated that frequencies of mycoplasma and pestiviruses in FBS were 14% and 84%, respectively. All of the batches were seronegative for pestiviral antibodies. After cell passages, all FBS samples were negative for hemadsorbent agents and by immunofluorescence for all of the viral species analyzed; PCR assays were negative for mycoplasma and pestiviruses. Our results demonstrate that, of all adventitious agents tested, local FBS batches only had traces of mycoplasma and pestiviruses; gamma irradiation was effective in inactivating them.