Essential and toxic elements in juvenile migratory commercial fish species in the Paraná River alluvial valley (South America): an approach for aquatic environmental monitoring Llamazares Vegh, Sabina; Biolé, Fernanda Gabriela; Volpedo, Alejandra The Paraná River is the sixth largest in the world, and the lower section of the river is one of the largest and most productive floodplain wetlands in South America. The alluvial plain is an important habitat for nursery and feeding areas for commercial fish; however, it has been heavily anthropized due to industries, agricultural activities, and the growth and expansion of metropolitan areas. The aim of this study was to determine element accumulation (As, Cd, Cr, Cu, Fe, Mn, Pb, and Zn) in young-of-the-year fish muscle from a floodplain lagoon of the lower Paraná River (Argentina) during summer and winter seasons, in relation with abiotic matrices (water and sediment). Four commercial fish species were assessed: sábalo (Prochilodus lineatus), boga (Megaleporinus obtusidens), dorado (Salminus brasiliensis), and pirapitá (Brycon orbignyanus). The concentrations of eight elements were detected by quadrupole inductively coupled plasma mass spectrometry. In water samples, Cd, Cr, Mn, Fe, and Zn levels were under the permissible limits for aquatic biota protection in both seasons, except for Pb (> 1 μg L−1) and Cu (> 2 μg L−1). In sediment, the average concentrations of all elements were under the limits set by national and international regulatory authorities. Differences in elemental concentrations between species and seasons were found. In general, the levels of elements in water were higher in summer than in winter, while in sediment, the lowest concentrations of elements were detected during the summer. The order of element concentration in fish muscle was Cd (0.01–0.04 μg g−1) < As (0.02–0.16 μg g−1) < Pb (0.03–0.23 μg g−1) < Mn (0.77–4.32 μg g−1) < Cu (1.01–4.07 μg g−1) < Cr (1.09–4.30 μg g−1) < Zn (15.8–31.7 μg g −1) < Fe (12.6–49.7 μg g−1). The accumulation assessment showed that the four fish species significantly accumulate Cr, Cu and Zn, and As and Zn from water and sediment, respectively. The correlation analysis showed a relationship between fish size and As, Cr, Cu, Fe, Mn, and Zn concentrations. Similarly, the highest values of element concentrations in muscle were detected during the summer when the fishes are early juveniles. The level of As, Cd, and Pb detected in B. orbignyanus, M. obtusidens, and P. lineatus juveniles suggested that these species had the potential to be used as biomarkers for assessing accumulation of toxic elements in the environment. Also, this study reveals that the accumulation patterns differ between size and fish species, which should be a considered insight at the moment of selecting a bioindicator to monitor pollution in the ecosystem.

Dimorfismo sexual de las aletas pélvicas en Potamotrygon motoro (Batoidea: Potamotrigonidae); Sexual dimorphism of the pelvic fins in Potamotrygon motoro (Batoid: Potamotrigonidae) Pérez, Dante; Olea, Gabriela Beatriz; Blanco Cohene, Tania Katherina; Rodriguez, Florencia Evelyn; Flores Quintana, Carolina Isabel Los claspers en los condrictios son alargamientos especializados en el lado posterior de las aletas pélvicas de los machos que se utilizan para la transferencia de esperma durante la cópula. El objetivo del presente estudio fue la descripción y caracterización de la morfología externa y los componentes esqueléticos en aletas pélvicas del clasper de Potamotrygon motoro (Batoidea: Potamotrygonidae). Se trabajó con tres ejemplares juveniles (2 machos y 1 hembra) y dos ejemplares adultos (1 macho y 1 hembra) provenientes del Rio Paraná, Corrientes Capital. Las muestras se fijaron en formol al 10%, y procesadas mediante la técnica de diafanización. El material fue conservado en glicerol para su observación. Macroscópicamente, el dimorfismo sexual se hace evidente en machos, mediante una estructura en la región posterior denominada clasper, de forma cónica ligeramente ahusada, visible dorsal y ventralmente. En muestras diafanizadas se puede distinguir los elementos cartilaginosos posteriores, diferenciándose un propterigioy un basipterigio, que unidos a este se localizan los segmentos basales y los cartílagosradiales de las aletas pélvicas; sin embargo, solo los machos desarrollan un clasper omixopterigio. En las hembras, las únicas estructuras esqueléticas posteriores al basipterigioson pequeños elementos nodulares (cartílagos terminales). Se evidenció que estos ejemplares en sus primeros días de vida ya presentan el dimorfismo sexual asociado a lapresencia de clasper en machos y su ausencia en hembras; sin embargo, los machosjuveniles no presentan el desarrollo total del mixopterigio que forma el clasper.; Claspers in chondrichthyans are specialized elongations on the posterior side of the pelvic fins of males that are used for sperm transfer during copulation. The aim of this study was the description and characterization of the external morphology and skeletal components of the pelvic fin clasper of Potamotrygon motoro (Batoidea: Potamotrygonidae). The study included three juvenile specimens (2 males and 1 female) and two adult specimens (1 male and 1 female) from the Paraná River, Corrientes Capital. The samples were fixed in 10% formalin and processed using the diaphanization technique. The material was preserved in glycerol for observation. Macroscopically, sexual dimorphism is evident in males, through a structure in the posterior region called a clasper, with a slightly tapered conical shape, visible dorsally and ventrally. In diaphanous samples, the posterior cartilaginous elements can be distinguished, differentiating a propterygium and a basipterygium, which together with it are located the basal segments and the radial cartilages of the pelvic fins; however, only males develop a clasper or mixopterygian. In females, the only skeletal structures posterior to the basipterygium are small nodular elements (terminal cartilages). It was evidenced that these specimens in their first days of life already present the sexual dimorphism associated with the presence of clasper in males and its absence in females; however, juvenile males do not present the full development of the mixopterygian that forms the clasper.

Geographic distribution notes: Tachymenis trigonata Avila, Luciano Javier; Udrizar Sauthier, Daniel Edgardo; Nuñez, Matias; Sugliano, Pablo Se realiza la cita más austral para la especie de serpientes Tachymenis trigonata.

Aproximación a la percepción de seguridad lingüística objetiva entre estudiantes, docentes y graduados universitarios; Approach to the perception of linguistic safety among students, teachers and university graduates De- Matteis, Lorena Marta Amalia La noción laboviana de inseguridad lingüística (1966) ha sido extensamente discutida como experiencia subjetiva (Francard et al., 1993; Bretegnier y Ledegen, 2002; Meyerhoff, 2006; Preston, 2013; Hennecke y Varga, 2020, entre otros), pero es también posible considerar una categoría objetiva para caracterizar contextos profesionales desde una perspectiva lingüístico-comunicativa (Mitchell, 2016; de- Matteis, 2020).
Este trabajo sistematiza las percepciones de estudiantes, graduados y docentes  universitarios en torno a la importancia de sus interacciones para la seguridad de tareas profesionales a partir de un cuestionario implementado en línea en el ámbito de la Universidad Nacional del Sur. El análisis cuali-cuantitativo de las respuestas sugiere que los mayores niveles de concienciación lingüística (Garrett, 2010) y comunicativa sobre la relación entre comunicación y seguridad se registran en carreras cuyos egresados podrán desempeñarse en ambientes socio-técnicos o en las que la comunicación constituye parte esencial del desempeño profesional.; The Labovian notion of linguistic insecurity (1966) has been extensively discussed as a subjective experience (Francard et al., 1993; Bretegnier y Ledegen, 2002; Meyerhoff, 2006; Preston, 2013; Hennecke and Varga, 2020, etc.), but it is also possible to consider an objective category to characterize professional contexts from a linguistic-communicative perspective (Mitchell, 2016; de- Matteis, 2020). is work systematizes the perceptions of students, graduates and university professors about the importance of their interactions for the safety of professional tasks as presented in the answers to a questionnaire implemented within the community of Universidad Nacional del Sur. e quali-quantitative analysis of the responses suggests that the highest levels of linguistic (Garrett, 2010) and communicative awareness about the relationship between communication and safety are registered in careers whose graduates will be able to work in socio-technical environments or in which communication is an essential part of professional performance.

Origen y evolución de lagunas costeras de la región pampeana: Mar Chiquita, Las Brusquitas y Reta (provincia de Buenos Aires, Argentina); Origin And Evolution Of Coastal Lagoonsfrom. The Pampean Region: Mar Chiquita,Las Brusquitas, Reta (Buenos Aires province, Argentina) Isla, Federico Ignacio; Bedmar, José Manuel; Vélez Agudelo, Camilo Andrés; Cortizo, Luis Camilo Low-lying coasts are specially conditioned for the origin and development of coastal lagoons. The Pampean region (Buenos Aires, Argentina) contains the surplus of a sea level fluctuation that occurred d during the last 6000 years. This report shows results from the study of three coastal lagoons at different stages of their evolution: Mar Chiquita coastal lagoon, Las Brusquitas estuarine lagoon, and the small coastal lagoon of Balneario Reta. The long-term evolution is considered in the case of Mar Chiquita and Las Brusquitas, while modern trends are also described for the Mar Chiquita silting problems and the urbanisation of the Reta village surrounding the lagoon. The study is based on radiocarbon datings, salinity analyses, and sedimentological records on outcrops and piston cores. At Mar Chiquita coastal lagoon, a shallow open bay has been restricting since the Middle Holocene, causing the development of marshes and tidal flats between cheniers and regressive spits. Its evolution is therefore conditioned to high-energy events that reworked bioclastic sands (cheniers and regressive spits) and the silting of fine sediments. The sequence cropping out at the outlet of the Las Brusquitas creek extended temporally between 6190 and 2380 14 C years BP; the estuarine lagoon was located at the outlet of two creeks. New outcrops exhumed and radiocarbon datings indicated this new interpretation of the site as an estuarine lagoon silted in the last 2000 years. The small estuarine lagoon (“microalbufera”) of Balneario Reta is another wetland flooded by the increase in water discharge due to artificial channels. The connection to the sea depends on the effects of high tides and winds blowing from the south. The contents in diatom assemblages were interpreted as indicators of changes in salinity balances during the Late Holocene. Oligohaline specimens dominated at the three coastal lagoons; polihaline and mesohaline assemblages characterise some intervals at the Mar Chiquita and Las Brusquitas sedimentary sequences. In order to preserve these coastal lagoons and the natural reserves related, it is necessary to preserve their dynamics according to forecasted sea level rise, and the water balances between salt and fresh waters.; Las costas bajas están especialmente condicionadas por el origen y desarrollo de lagunas costeras. La región pampeana (Buenos Aires, Argentina) contiene además el registro de la fluctuación del nivel del mar que ocurrió en los últimos 6000 años. Este informe muestra los resultados de tres lagunas costeras en diferentes estadíos de sus evoluciones: Mar Chiquita, arroyo Las Brusquitas y la pequeña laguna costera del Balneario Reta. La evolución a largo plazo es considerada en Mar Chiquita y Las Brusquitas mientras que tendencias modernas son descriptas tanto para los problemas de sedimentación en Mar Chiquita como la urbanización de la villa de Reta que rodea la laguna costera. El estudio está basado en dataciones radiocarbónicas, análisis de salinidad y registros sedimentológicos de afloramientos y de testigos obtenidos por piston cores. En la laguna costera Mar Chiquita, una amplia bahía poco profunda se fue restringiendo desde el Holoceno Medio, originando el desarrollo de marismas y planicies mareales entre cheniers y espigas regresivas. Su evolución está de este modo condicionada a eventos de alta energía que retrabajaron arenas bioclásticas (cheniers y espigas regresivas) y la sedimentación con material fino. La secuencia que aflora en la desembocadura del Arroyo Las Brusquitas se extendió temporalmente entre 6190 y 2380 años radiocarbónicos AP; la laguna estuarina se desarrolló en la desembocadura de dos arroyos. Nuevos afloramientos exhumados y dataciones radiocarbónicas indicaron nuevas interpretaciones como una laguna estuarina que se colmató en los últimos 2000 años. La pequeña laguna estuarina (“microalbufera”) del Balneario Reta es otro humedal inundado por el aumento del drenaje inducido por canales artificiales. La conexión con el mar depende de los efectos de mareas altas y los vientos soplando desde el sur. Los contenidos en asociaciones de diatomeas fueron interpretadas en cambios en los balances salinos durante el Holoceno tardío. Especies oligohalinas dominan en las tres lagunas costeras; asociaciones polihalinas y mesohalinas caracterizan algunos intervalos en las secuencias sedimentarias de Mar Chiquita y Las Brusquitas. Con el objeto de preservar estas lagunas costeras y las reservas naturales asociadas, es necesario preservar sus dinámicas de acuerdo al aumento previsto del nivel del mar, y los balances entre aguas dulces y saladas.

El Zorzalito Boreal (Catharus ustulatus): una nueva especie para la avifauna de la provincia de Corrientes, Argentina.; The swainson’s thrush (catharus ustulatus): a new species for the avifauna of Corrientes Province, Argentina Fariña, Nestor; Villalba, Olga; Di Sallo, Facundo Gabriel El Zorzalito Boreal (Catharus ustulatus) nidifica en Norteamérica y luego visita el oeste de Sudamérica, alcanzando el noroeste y centro-oeste de Argentina. Reportamos los primeros registros de Zorzalito Boreal en la Provincia de Corrientes, Argentina. Los registros documentados por medio de una captura con red de niebla y grabaciones de voces se produjeron en la Reserva Natural Rincón de Santa María, departamento Ituzaingó. Adicionalmente aportamos datos biométricos del ejemplar capturado. Estas observaciones constituyen un nuevo registro fuera de su área de invernada habitual.; The Swainson’s Thrush (Catharus ustulatus) breeds in North America and then visits western South America, reaching northwest and west-central Argentina. We report the first records of Swainson’s Thrush in Corrientes Province, Argentina. We captured the birds using mist nets and recorded their vocalizations in the Rincón de Santa María Nature Reserve, Ituzaingó department. Additionally, we provide biometric data of the captured specimen. The present record of Swainson’s Thrush in Corrientes is a new record outside its usual wintering area.

SES Dashboard: A linked data platform to manage data on Southern Elephant Sea Zárate, Marcos Daniel; Eder, Elena Beatriz; Delrieux, Claudio Augusto; Lewis, Mirtha Noemi; Nuñez, Gustavo Marcelo; Ceballos, Luis Dario In this paper we present SES Dashboard, a linked data platform developed to manage information ofSouthern Elephant Seals (Mirounga leonina Linnaeus, 1758) from Península Valdés colony (Patagonia,Argentina), collected over more than two decades of research. Southern elephant seals spend most oftheir time foraging at sea, alternating with two short and highly synchronized haul-outs ashore forbreeding and molting. On land, the distribution of the colony extends along ≈350 km, while at seaindividuals travel thousands of kilometers The information recorded is mainly based on georeferenceddata from censuses, bioregisters (trajectories at sea and hydrographic pro¦les), and bibliographybased on the above data.

Paleontological record of a Gondwana cretaceous paleolakes as proxi for paleoclimate reconstruction; Registro Paleontológico de un Paleolago Cretácico de Gondwana como Proxy para reconstrucciones paleoclimáticas Benavente, Cecilia Andrea; Balaguer Gasull, Juan Ignacio; Giordano, Paula Guillermina; Mancuso, Adriana Cecilia; Arcucci, Andrea Beatriz The La Cantera Formation (Aptian) represents an underfilled lake system developed in an extensional basin during the Cretaceoushothouse and it bears an abundant and diverse fossil record. Our goal was to investigate paleoclimate conditions of the unit from a multiproxyapproach. We analyzed two proxies: a) the stable isotope (carbon and oxygen) composition of basal Actinopterygii and Neopterygii fish remainsand from indeterminate plant remains; and b) the clay mineral assemblage composition; providing two independent lines of evidence toreconstruct paleoclimate conditions including paleotemperature calculations for lake waters. The values obtained for fish remains for δ13Crange between -8.4 and -1.3 ‰(δ13C = χ -5.57‰; σ ± 2.25); and δ18O values that vary between -5.7 and -3.6‰(δ18O = χ -4.33‰; σ ± 0.84); inthe case of plant remains δ13C values range between -25.8 and -22.8‰(δ13C = χ -25‰-4.33). Paleotemperatures obtained from δ18O for thewater column ranged between 23.33 to 35.80 ºC. Plant δ13C signature allowed obtaining a δ13CCO2 composition of -5 ‰. This agrees with theinterpretation of the La Cantera originating from sediment deposition in an underfilled lake basin and with the global climate context of theCretaceous. The clay mineral assemblage is dominated by illite-smectite indicating enhanced hydrolysis and seasonal rainfall supportingtemporal warmup of the lake. Our data supports aridity conditions during the La Cantera paleolake existence. These findings suggest thatgeochemical proxies of paleontological datasets are accurate for paleoclimate reconstructions for the deep time records of the La Canteralacustrine system.; La Formación La Cantera representa un sistema lacustre underfilled desarrollado en una cuenca extensional durante la casa cálida del Cretácico y posee un registro fósil abundante y diverso. Investigamos las condiciones paleoclimáticas para la unidad desde un enfoque multiproxy. Analizamos dos proxies: a) la composición isotópica del carbono y del oxígeno de peces Actinopterygii basales y Neopterygii y de restos de plantas; y b) la composición de los ensambles de arcillas; aportando líneas de evidencia independientes a la reconstrucción paleoclimática. Los valores obtenidos para peces de δ13C varían entre -8.4 y -1.3‰ (δ13C = χ -5.57‰; σ ± 2.25); y para δ18O varían entre -5.7 y -3.6‰ (δ18O = χ -4.33‰; σ ± 0.84); en el caso de las plantas varían entre -25.8 y -22.8‰ (δ13C = χ -25‰; σ ± 4.33). Las paleotemperaturas obtenidas a partir del δ18O para la columna de agua fueron de 23.33 a 35.80 °C. La firma isotópica del δ13C de las plantas permitió obtener la composición de δ13CCO2 de -5 ‰. Esto concuerda con la interpretación de que La Formación Cantera pudo haberse originado a partir de la depositación de sedimentos en un paleolago underfilled y con el contexto paleoclimático global del Cretácico. Los ensambles de arcillas están dominados por illita-esmectita indicando un índice de hidrólisis elevado y estacionalidad en las precipitaciones lo que apoya el calentamiento temporal del cuerpo de agua. Estos datos indican condiciones de aridez durante la existencia del paleolago La Cantera y sugieren que los proxies geoquímicos de las bases de datos paleontológicas son precisos para la reconstrucción del paleoclima local en tiempo profundo de la Formación La Cantera.

Extending the analysis on the best solar activity proxy for long-term ionospheric investigations Zossi, Bruno Santiago; Medina, Franco Dario; Tan Jun Rios, María Gloria; Lastovicka, Jan; Durán, Trinidad; Fagre, Mariano; de Haro Barbás, Blas Federico; Elias, Ana Georgina Based on a previous study to select the best solar activity proxy for foF2 modelling, we expand the analysis to include 24 h time span, increase the spatial coverage by considering additional ionospheric stations, and update the analysis to 2021. Annual means of foF2 are analysed for 12 selected stations from Europe, Asia and Oceania, with high-quality data covering the period 1978–2021 in most of the cases, including two of the three European stations of the previous study. The same four solar proxies were used: F10.7, F30, MgII and HeII, which, based on the high linear correlation between each of them and foF2, serve to model this ionospheric parameter through a linear regression. The results of our comparative analysis, extended to more stations, all the hours and updated time series, agree with previous works, with MgII and F30 being the best solar proxies for foF2 modelling, while HeII is found to be the least effective for this purpose. The importance of the solar proxy selection to model foF2 for filtering purposes to later estimate long-term trends is highlighted considering that different solar proxies applied might result in somewhat different foF2 long-term trend values.

Sobre la referencialidad en L’Eve future y fotografías de la Salpêtrière; The Referentiality in L’Eve future and Photographs of the Salpêtrière Zori, Paula En L’Eve future (1886), las apariencias de Hadaly, creación tecnológica, y Alicia, mujer biológica, son idénticas. Sin embargo, una de ellas representa el ideal corrompido mientras que la otra adviene al mundo para erigirse en la nueva perfección futura. De esta manera, la copia, la imagen, desacredita a su referente. La implementación de la fotografía en la psicología experimental presenta una dinámica similar. Así, las imágenes tomadas a pacientes diagnosticadas con histeria en el hospital de la Salpêtrière se consolidan no sólo como medio de registro y archivo sino que, además, funcionan como fuentes de conocimiento que permiten evidenciar y diagnosticar algunos fenómenos: permiten ver más y mejor. En estos dos casos se puede apreciar cómo todas las partes del cuerpo —tanto las internas como las externas— se fragmentan y, luego, se decodifican en dos sentidos: uno que las hiperespecifica en segmentos discretos y otro que las generaliza en categorías de clasificación. En ambos se produce un efecto de aislamiento de la parte que lo aleja de la persona individual a la que pertenecía originalmente. La interferencia en la relación con el referente, que delatan ambos materiales, y la intención de estudiar y conocer los cuerpos femeninos, que devino en la posibilidad de controlarlos —para imitarlo y suplantarlo en L’Eve future, y para diagnosticarlos en las fotografías de la Salpêtrière—, son los interrogantes principales del presente estudio.; In L’Eve future (1886), the appearances of Hadaly, a technological creation, and Alicia, a biological woman, are identical. However, one of them represents the corrupted ideal while the other comes into the world to become the new perfection. In this way, the copy, the image, discredits its referent. The implementation of hotography in the study of psychology presents a similar dynamics. Thus, the hotographic images of patients diagnosed with hysteria in the hospital of Salpêtrière are consolidated not only as a recording and filing means but also serve as sources of knowledge that enable us to see and diagnose determined phenomena: they allow a clearer and more detailed vision. These two cases evince how all body parts—internal and external—are fragmented and then decoded in two ways: one that xtremely specifies them into discrete segments and another that generalizes them into classification categories. In both cases, an effect of isolation of the part takes place, and it distances it from the individual person to which it originally belonged. The interference in the relationship with the referent, which both materials reveal, and the intention to study and learn about female bodies, which allowed to control them—to imitate and supplant them in L’Eve future, and to diagnose them in the hotographs from the Salpêtrière—are the central concerns in this study.

Calibration of time transfer systems in time and frequency laboratories de la Pina, Carla Ligia; Pasquaré, Alfredo Oscar; Luna, D. A.; Arias, Elisa Felicitas; Brunini, Claudio Antonio; Galván, Romina de Los Angeles El siguiente trabajo aborda la calibración de dos institutos argentinos que participan del calculo del Tiempo Universal Coordinado (UTC) en el Bureau International des Poids et Mesures (BIPM). Las medidas de tiempo y frecuencia son parámetros indispensables para la astronomía y la geodesia y como tales requieren de una completa caracterizacion de la incertidumbre.

Thermal Gelation of Proteins from Cajanus cajan Influenced by pH and Ionic Strength Fernández Sosa, Eliana Isabel; Chaves, María Guadalupe; Peyrano, Felicitas; Quiroga, Alejandra Viviana; Avanza, María Victoria Cajanus cajan [pigeon pea (PP)] is an important legume crop for subsistence agriculture and its seeds are an alternative plant-based protein source. PP protein isolates (PPI) are able to form heat-induced gels that could be used for food applications. The aim of this work was to study the infuence of pH (2.1, 3.9, 6.3, and 8.3) and ionic strength (μ) (0.10 and 0.54) on thermal stability and thermal gelation of PPI obtained by alkaline extraction (pH 8.0) and isoelectric precipitation. Thermal stability of PPI changed with pH variation at low ionic strength (μ=0.10), decreasing this dependence with the increase of ionic strength (μ=0.54). At μ=0.10, gelation capacity of PPI was lower at pH 2.1 and pH 3.9. These gels presented a coarse network, which entails low WHC. At pH 6.3 and pH 8.3, gels showed a solid-like character with a compact and homogeneous matrix, with better WHC. At μ=0.54, gel formation was favoured at pH 2.1 and pH 3.9. G′ 20/G′ 95 ratio values and diferential solubility results suggest that hydrogen bonds and electrostatic interactions could play an important role in gel formation at pH 6.3 and pH 8.3.

Transversalización del género y desarrollo agropecuario: Aportes para el abordaje sistémico desde un enfoque psicosocial; Gender mainstream and agricultural development: Contributions towards a systemic approach from a psychosocial perspective Conti, Santiago; Sánchez Iudicello, Suzette Melisa La agenda de género viene siendo incorporada a las políticas en las ruralidades latinoamericanas. Sin embargo, se identifica en ellas un sesgo en relación con comprender el género como un problema del otro: de la población rural. El artículo procura contribuir a las políticas del desarrollo agropecuario sosteniendo que la transversalización del género debe atender a las dinámicas institucionales y de las prácticas de intervención territorial. Se propone un modelo analítico psicosocial desde un abordaje sistémico para identificar desigualdades de género en dinámicas institucionales y territoriales. Con metodologías cualitativas de observación participante, registros de campo y una encuesta abierta, se generaron datos y analizaron resultados para comprender los obstáculos en términos de género en el Instituto Nacional de Tecnología Agropecuaria (INTA). Posteriormente, se discuten los resultados y características del modelo propuesto; finalmente, se concluye destacando aportes, limitaciones y desafíos para la transversalización de género en el ámbito agropecuario.; The gender agenda is being incorporated into rural policies in Latin American. However, a bias is identified in them in relation to understanding gender as one problem of the other: of the rural population. This paper aims to contribute to agricultural development policies, based on the argument that gender mainstreaming must address both institutional dynamics and territorial intervention practices. For this purpose, we propose a psychosocial analytical model from a systemic approach to identify gender inequalities in institutional and territorial dynamics. From a qualitative perspective, data were generated through participant observation, field records and a survey. Results were analyzed to understand the obstacles associated to gender gaps at the National Institute of Agriculture Technology (INTA). Subsequently, the main results and characteristics of the proposed model are discussed; Finally, we conclude by highlighting the proposed model’s contributions and limitations, and addressing challenges for the gender mainstreaming agenda in agricultural development.

The Critical Role of Ligand Flexibility on the Activity of Free and Immobilized Mn Superoxide Dismutase Mimics Richezzi, Micaela; Signorella, Sharon; Palopoli, Claudia Marcela; Pellegri, Nora Susana; Hureau, Christelle; Signorella, Sandra Rosanna In low-molecular-weight Mn superoxide dismutase (SOD) mimics, the ligand plays a key role in tuning the reactivity of the metal center with O2•−. We used three ligands differing in their donor sites, flexibility and/or charge, to compare the redox properties and SOD activity of the resulting Mn complexes: 1,3-bis[(pyridin-2-ylmethyl)(propargyl)amino]propane (pypapn), 1,3-bis(pyridin-2-ylmethyleneamino)propane (py2pn) and 1,4-bis(salicylidenamino)butane (H2salbn). These ligands afford Mn complexes that, in aqueous solution, exist as mononuclear species [Mn(II)(pypapn)(H2O)2]2+, [Mn(II)(py2pn)(H2O)2]2+ and [Mn(III)(salbn)(H2O)2]+. The relative reactivity of these compounds with O2•− at pH 7.8, [Mn(pypapn)(H2O)2]2+ > [Mn(salbn)(H2O)2]+ > [Mn(py2pn)(H2O)2]2+, is independent of the redox potential but strongly depends on the ligand flexibility which becomes a critical feature when the reaction occurs through an inner-sphere electron-transfer mechanism. Immobilization was used to isolate and protect the catalyst from dissociation or dimerization during catalysis. [Mn(pypapn)(H2O)2]2+, with the alkyne group, was covalently grafted to azide functionalized mesoporous silica through click chemistry, while [Mn(py2pn)(solv)2]2+ and [Mn(salbn)(solv)2]+ were encapsulated in SBA-15 mesoporous silica through ionic exchange. The retention or enhancement of the SOD activity and the improved stability of the covalently attached catalyst and the doubly charged complex encapsulated in the silica pores, make them suitable for use in aqueous media.

Una nota sobre la descripción de la ira de Melibea y su relación con el De ira de Séneca; A note on the description of Melibea’s ire and its relationship with Seneca’s De ira Fuentes, Juan Héctor Tomando como referencia los estudios de FothergillPayne (1986, 1988, 1993) sobre la presencia de Séneca en La Celestina, se ofrece un análisis detallado de la descripción de la ira de Melibea del Acto VI, escena 2, en relación con la tradición estoica de la infamatio irae y, de modo particular, con los retratos del airado del libro I, 1, 2-4 del De ira según la traducción castellana medieval dedicada a Sancho IV. Dicha traducción tuvo una importante difusión durante el siglo XV y su uso por parte del autor de la interpolación del Acto VI es absolutamente coherente con una intencionalidad docente y moral de La Celestina.; Following Fothergill-Payne's studies (1986, 1988, 1993) on the presence of Seneca in La Celestina, a detailed analysis of the description of the ire of Melibea in Act VI, scene 2, is offered. This analysis relates this description to the Stoic tradition of the infamatio irae and, in particular, to the portraits of the angry man from book I, 1, 2-4 of De ira, according to the medieval Spanish translation dedicated to King Sancho IV. This translation circulated widely during the fifteenth century. Its use by the author of the interpolation of Act VI reinforces the didactic and moralizing intention of the work in general.

Environmental Effects of Sport Horse Production Farms in Argentina Vaccaro, Mariana Marcela; Volpedo, Alejandra; García Liñeiro, José Alberto; Fernandez Cirelli, Alicia Argentina is one of the countries that exports animals for equestrian sports. This paperanalyzes the environmental effects of sport horse production farms in Argentina and proposes actionsto minimize the environmental effects of this type of production. Twenty-six sport horse productionfarms in the province of Buenos Aires were studied. The proximity of the farms to a surface waterbody, the destination of the stall bedding, management practices and whether they receive veterinary advice were the characteristics analyzed in relation to feed, its composition and water consumption according to the performance of the animals. A nominal qualitative analysis on the impact was carried out considering three impact categories: low, medium and high. The association between the four environmental variables analyzed has shown that only two farms have a low environmental impact, while eighteen farms have a medium impact and five farms have a high impact. The results show that the role of the professional veterinarian is key in minimizing environmental impact and that the management of excretions and stall bedding should be reviewed in order to reduce the impact. This paper presents recommendations associated with water use, feed and manure management.

Conocimiento experto y legitimidad en el proceso de creación de derecho; Expert Knowledge and Legitimacy in the Law-making Process Iosa, Juan Francisco Primero reconstruyo el modo en que Canale presenta el problemade la (i)legitimidad de las disposiciones opacas, i. e., textos a los queel legislador otorga rango de ley, pese a no comprender su signi!cado, pordeferencia a una supuesta autoridad teórica. En dicha reconstrucción marcovarios aspectos problemáticos. Luego evalúo su respuesta. La encuentroinsu!ciente en tanto no nos ofrece ninguna solución categórica al problema.Bajo el supuesto, plausible, de que dichas disposiciones son ilegítimas(y de que Canale compartiría esa tesis) propongo un dilema: dado que nopodemos prescindir del conocimiento experto opaco sino pagando altoscostos epistémicos entonces debemos elegir entre legitimidad y conocimiento.Ofrezco, por último, una salida al dilema que implica negar quedichas disposiciones sean necesariamente ilegítimas.; First, I reconstruct the way in which Canale presents the problem of the (il)legitimacy of opaque provisions, i. e., texts to which the legislator grants the rank of law, despite not understanding its meaning, out of deference to a supposed theoretical authority. In this reconstruction, I underwrite several problematic aspects. "en I evaluate his response.I find it insuficient in that it does not offer us any categorical solution to the problemUnder the plausible assumption that these dispositions are illegitimate (and that Canale would share this thesis), I propose a dilemma: since we cannot do without opaque expert knowledge except by paying high epistemic costs, then we must choose between legitimacy and knowledge. Finally, I o$er a way out of the dilemma by denying that such provisions are always illegitimate.

Mirá las fotos!: el aprovisionamiento de alimentos en comedores y merenderos comunitarios Dettano, Andrea; Sordini, María Victoria En el puzzle que se organiza entre las imágenes y las narraciones provenientes de las entrevistasvirtuales, el presente escrito se propone hacer un análisis de las imágenes que aparecen en laspublicaciones de las páginas/perfiles y grupos de Facebook de comedores y merenderos comunitarios de La Matanza y General Pueyrredón durante 2021. Más precisamente, nuestro objetivo es explorar el carácter testimonial de las imágenes de los comedores y merenderos en cuanto a la recepción y entrega de donaciones, lo que involucra diferentes lógicas y momentos del abastecimiento. En este escrito, nos detendremos a pensar en algunas cuestiones vinculadas directamente a la exhibición de productos y prácticas de entrega de los mismos, así como de preparaciones que aparecen en las redes sociales. Personas, lugares, objetos y vivencias son elcontenido de las fotografías y es en el recorrido por estos entornos virtuales que hemos organizado algunos interrogantes: ¿Cómo se organiza este contenido? ¿Qué elementos aparecen en las fotos? ¿hay personas? ¿Qué acciones o actividades realizan? ¿Cuáles son sus poses? ¿Cómo se exhibe el momento del abastecimiento?

Visiones y visualidades en Las tres mitades de Ino Moxo y otros brujos de la Amazonía de César Calvo; Visions and Visualities in Las tres mitades de Ino Moxo y otros brujos by César Calvo Di Benedetto, Matías Nicolás Proponemos una lectura crítica de la obra de César Calvo Las tres mitades de Ino Moxo y otros brujos de la Amazonía a partir de la confluencia entre literatura y visualidades en tanto principio constructivo de una proliferación de soportes y de materiales al interior de la obra, como es el caso de la pintura de César Calvo de Araújo, los grabados de Francisco Mariotti o las fotografías de Augusto Falconi. La práctica aglutinante, tanto de la crítica a la especificidad como vector fundamental de la autonomía estética así como también exposición del archivo amazónico, se trata del estado de trance promovido por la ingesta de ayahuasca. Se obtiene así una forma literaria ligada a la construcción de un régimen de lo visual basado en los desarreglos de la percepción alrededor de la cual orbitan las prácticas visuales incorporadas a la ficción.; In this article, we propose a critical reading of the work of César Calvo Las tres mitades de Ino Moxo y otros brujos de la Amazonía from the confluence between literature and visualities as a constructive principle of a destruction of supports and materials within the work, as This is the case of the painting by César Calvo de Araújo, the engravings by Francisco Mariotti or the photographs by Augusto Falconi. The binding practice, both of the criticism of specificity as a fundamental vector of autonomy as well as exposure of the Amazonian archive, is about the trance state promoted by the ingestion of ayahuasca. In this way, a literary form linked to the construction of a regime of the visual based on the derangements of perception is obtained, around which the visual practices built on fiction orbit.

Nuclear physics midterm plan at Legnaro National Laboratories (LNL) Ballan, M.; Bottoni, S.; Caamaño, M.; Caciolli, A.; Campostrini, M.; Cicerchia, M.; Crespi, F. C. L.; Cristallo, S.; Dell’Aquila, D.; Depalo, R.; Fioretto, E.; Galtarossa, F.; Gasques, L. R.; Gottardo, A.; Gramegna, F.; Gulminelli, F.; Kurtukian Nieto, T.; La Cognata, M.; Lenzi, S. M.; Marchi, T.; Mazurek, K.; Mengoni, D.; Mou, L.; Arazi, Andres; Wheldon, C.; Wieland, O.; Wimmer, K.; Wyss, J.; Zago, L.; Zenoni, A. The next years will see the completion of the radioactive ion beam facility SPES (Selective Production of Exotic Species)and the upgrade of the accelerators complex at Istituto Nazionale di Fisica Nucleare – Legnaro National Laboratories (LNL) openingup new possibilities in the fields of nuclear structure, nuclear dynamics, nuclear astrophysics, and applications. The nuclear physicscommunity has organised a workshop to discuss the new physics opportunities that will be possible in the near future by employingstate-of-the-art detection systems. A detailed discussion of the outcome from the workshop is presented in this report.