Factores que afectan la participación social de adultos con traumatismo craneoencefálico: Una revisión sistemática; Factors affecting social participation in adults with traumatic brain injury: A systematic review Leiva, Samanta Daniela; Bacigalupe, Lucía; Caamaño, Maria Paula Objetivo. La participación social es el acto de involucrarse en actividades que proporcionaninteracciones con otras personas, y puede verse afectada en personas que han sufrido un traumatismo craneoencefálico (TCE). Este trabajo propone identificar qué factores influyen en dicha afectación. Método. Se realizó una revisión sistemática de artículos disponibles en PubMed, EBSCO y SCOPUS, publicados desde 2010 hasta 2020. Resultados. Los artículos revisados concuerdan que la participación social de los pacientes adultos con TCE se ve afectada por las siguientes variables: síntomas depresivos, edad, nivel educativo, alteraciones cognitivas y calidad de vida. Finalmente, se observó que la evaluación de la participación social está focalizada en la frecuencia con que los pacientes realizan actividades sociales y no indagan en la satisfacción personal con el nivel de participación.; Objective. Social participation is the act of getting involved in activities that provide interactions with other people and can be impaired in individuals who suffered a traumatic brain injury (TBI). This study aims to identify which factors influence social participation after TBI. Method. A systematic review of articles available in PubMed, EBSCO, and SCOPUS, published from 2010 to 2020 was conducted. Results. Revised articles conclude that social participation in adult patients with TBI is affected by the following variables: depressive symptoms, age, educational level, cognitive impairment, and quality of life. Finally, the focus of the assessment of social participation was the frequency with patients carrying out social activities and not the personal satisfaction with their level of participation.

Inocencia, pureza y abnegación. la construcción de la imagen de María Eugenia Vidal en las elecciones de la provincia de Buenos Aires, Argentina (2015) Rosso, Germán Este trabajo se propone estudiar la construcción de la imagen de María Eugenia Vidal en las elecciones provinciales de 2015. Se recuperan los aportes de los estudios iconográficos inspirados en Warburg y de la estética disposicionalista esbozada por Bourdieu para reflexionar acerca de las condiciones sociales e históricas que explican su efectividad en términos de producción de adhesiones políticas. De este modo se establece que la apariencia de Vidal remite a elementos simbólicos y visuales ligados, por un lado, a los imaginarios de la pureza y el desinterés en la iconografía mariana y, por otro, a las rutinas femeninas disponibles en la esfera política argentina. Es así como la imagen de Vidal pudo encarnar sensiblemente las ideas de “cercanía”, “transparencia” y “honestidad” pregonadas en la campaña de Cambiemos, así como también profundizar la polarización con su principal contrincante, acusado mediáticamente de vincularse con la corrupción y el narcotráfico. Finalmente, se articulan las conclusiones del presente trabajo con distintos estudios sociológicos sobre las formas de reclutamiento y trabajo territorial de PRO-Cambiemos, para destacar el modo en que cierta concepción desinteresada de la política, proveniente de las prácticas religiosas de caridad, constituye una de las vías de adhesión a esta fuerza.; This paper aims to study the construction of the image of Maria Eugenia Vidal in the 2015 provincial elections. The contributions of the iconographic studies inspired by Warburg and the dispositionalist aesthetic outlined by Bourdieu are recovered to reflect on the social and historical conditions that explain their effectiveness in terms of production of political supports. We establish that Vidal’s appearance refers to symbolic and visual elements linked, on the one hand, to the imaginaries of purity and disinterest in Marian iconography and, on the other hand, to the feminine routines available in the Argentine political sphere. This is how Vidal's image was able to embody the ideas of "closeness", "transparency" and "honesty" proclaimed in the Cambiemos campaign, as well as deepening the polarization with his main opponent, accused by the media of being involved in corruption and drug trafficking. Finally, the conclusions of the present work are articulated with sociological studies on the forms of recruitment and territorial work of PRO-Cambiemos, in order to highlight the way in which a certain disinterested conception of politics, coming from religious practices of charity, constitutes one of the forms of affinity with this force.

H-theorems for systems of coupled nonlinear Fokker-Planck equations Plastino, Ángel Ricardo; Wedemann, R. S.; Nobre, F. D. Nonlinear diffusion and Fokker-Planck equations constitute valuable tools in the study of diverse phenomena in complex systems. Processes described by these equations are closely related to thermostatistical formalisms based on generalized entropic functionals. Inspired by these relations, we explore the behavior of systems of coupled, nonlinear Fokker-Planck equations. In particular, we establish an H-theorem for a wide family of this type of systems. This H-theorem is formulated in terms of an appropriate free-energy-like functional. The nonlinear evolution equations discussed here include, as particular instances, those governing the dynamics of interacting multi-species, many-body systems in the overdamped-motion regime.

Dos caras de la participación ciudadana: Análisis sobre la inclusión - exclusión política en instancias presenciales y mediadas por aplicaciones Sorribas, Patricia Mariel; Gutiérrez, Mariana Carla; Mola, Débora Jeanette; Garay Reyna, Zenaida El análisis de las innovaciones institucionales para canalizar la participación ciudadana permite reconocer que pueden orientarse a la concreción o reforzamientos de proyectos "societales" muy diversos y contrastantes. En el presente trabajo nos proponemos abordar -mediante diversos enfoques teórico-metodológicos- diferentes instancias participativas para aportar evidencia a partir de la cual podamos contribuir a esta discusión. Los casos seleccionados corresponden a innovaciones institucionales implementadas en distintos niveles de gobierno (nacional, provincial y municipal), con variados diseños y que incentiva la participación ciudadana individual o colectiva.Con ese propósito principalmente consideramos qué tan inclusivas son cada una de las instancias analizadas y si tienden más al fortalecimiento del gobierno representativo que a la instalación progresiva de una concepción más participativa de la democracia a nivel municipal, provincial y nacional. La evidencia producida permite reconocer que en el caso de las JPV, el PP Barrial, las JPC-CB y la aplicación móvil del gobierno municipal la centralidad de la gestión encarada por los representantes en el gobierno -local o provincial- es explícita, fortaleciendo una concepción representativa de la democracia en ambos niveles de gobierno. En el caso de las políticas culturales de cultura comunitaria, la centralidad de la gestión nacional y municipal no es explícita, más bien resulta encubierta por la retórica de gestión conjunta. En ellas la participación plural en el marco de estas políticas ha resultado restringida y despotenciada por la debilidad institucional, pero también por efecto de una participación instrumental y corporativa.En términos de diversidad epistémica el conjunto de estas innovaciones no logran garantizar la inclusión de canales variados, abiertos y accesibles para que personas de todo tipo de recorrido de vida, en todas las posiciones sociales, expresen públicamente su disenso.

Mathematical models to assessment the energy performance of textured cladding for facades Alchapar, Noelia Liliana; Correa Cantaloube, Erica Norma The temperature increase of a city in relation to its peripheral areas leads to the formation of an Urban Heat Island. Working on the opto-thermal properties of the building envelope is a viable mitigation strategy to reduce the temperatures of a city. Having quantitative data on energy performance allows the development of precise evaluations and the selection of the most efficient data in relation to energy consumption. The degree of efficiency of a material is calculated with an indicator called Solar Reflectance Index (SRI). Since opto-thermal properties change over time, the standard recommends obtaining the SRI level of both new and three-year-aged material (SRI3). In the present work, 80 facade claddings were evaluated to: (a) determine which qualitative variables significantly influence the SRI3 of the claddings; (b) obtain an equation that calculates the SRI3 without the need to monitor the large number of variables used for its calculation. For this, the following statistical methods were used: Multifactorial ANOVA and linear regression model. In this correlational analysis, color, composition and texture were selected as independent variables. The research showed that color is the variable that significantly influences SRI3 in all the evaluated claddings. By means of the equation obtained with the regression model, the SRI3 index was predicted reaching 95% IC. These results significantly save time and simplify the process of obtaining data since it is not necessary to monitor numerous input variables to calculate the indicator.

Human macrophage polarization shapes B. pertussis intracellular persistence Valdez, Hugo Alberto; Marin Franco, Jose Luis; Gorgojo, Juan Pablo; Alvarez Hayes, Jimena; Balboa, Luciana; Fernandez Lahore, Marcelo; Sasiain, Maria del Carmen; Rodriguez, Maria Eugenia We previously demonstrated that Bordetella pertussis, the etiologic agent of whooping cough, is able to survive inside human macrophages. The aim of this study was to examine the influence of macrophage polarization in the development of B. pertussis intracellular infections. To this end, primary human monocytes were differentiated into M1, M2a, or M2c macrophages and further infected with B. pertussis. Infected M1 macrophages showed a proinflammatory response evidenced by the production of TNF-α, IL-12p70, and IL-6. Conversely, infection of M2a and M2c macrophages did not induce TNF-α, IL-12p70, nor IL-6 at any time postinfection but showed a significant increase of M2 markers, such as CD206, CD163, and CD209. Interestingly, anti-inflammatory cytokines, like IL-10 and TGF-β, were induced after infection in the 3 macrophage phenotypes. B. pertussis phagocytosis by M1 macrophages was lower than by M2 phenotypes, which may be ascribed to differences in the expression level of B. pertussis docking molecules on the surface of the different phenotypes. Intracellular bactericidal activity was found to be significantly higher in M1 than in M2a or M2c cells, but live bacteria were still detected within the 3 phenotypes at the late time points after infection. In summary, this study shows that intracellular B. pertussis is able to survive regardless of the macrophage activation program, but its intracellular survival proved higher in M2 compared with the M1 macrophages, being M2c the best candidate to develop into a niche of persistence for B. pertussis.

Brujas, exorcistas y posesas. Terror, policial y complot en Leonardo Oyola y Nicolás Correa; Witches, exorcists and possessed. Horror, police genre and conspiracy in Leonardo Oyola y Nicolás Correa Feuillet, Lucía El artículo aborda las novelas Santería y Sacrificio, de Leonardo Oyola y Súcubo e Íncubo, de Nicolás Correa, desde la perspectiva de la hermenéutica dialéctica propuesta por Fredric Jameson. El análisis se enfoca en algunos rasgos de los géneros policial y de terror para dar cuenta del complot como ideologema que expresa los antagonismos impuestos por el modo de producción social. Las voces transgresoras de una bruja, un exorcista y una posesa permiten acceder a estas historias que superponen lo cognoscible y lo esotérico, y articulan resistencias individuales que proyectan formas conspirativas de subversión.; This article analyzes the novels Santería and Sacrificio, by Leonardo Oyola, and Súcubo and Íncubo, by Nicolás Correa, from the perspective of the dialectical hermeneutics proposed by Fredric Jameson. The study focuses on some features of police genre and horror to account for the plot as an ideologeme that expresses the antagonisms imposed by the social mode of production. The transgressive voices of a witch, an exorcist and a possessed woman allow access to these stories that superimpose the knowable and the esoteric, and articulate conspirational resistances.

2-Nested Matrices: Towards Understanding the Structure of Circle Graphs Durán, Guillermo Enrique; Pardal, Nina; Safe, Martin Dario A (0, 1)-matrix has the consecutive-ones property (C1P) if its columns can be permuted to make the 1’s in each row appear consecutively. This property was characterized in terms of forbidden submatrices by Tucker in 1972. Several graph classes were characterized by means of this property, including interval graphs and strongly chordal digraphs. In this work, we define and characterize 2-nested matrices, which are (0, 1)-matrices with a variant of the C1P and for which there is also a certain assignment of one of two colors to each block of consecutive 1’s in each row. The characterization of 2-nested matrices in the present work is of key importance to characterize split graphs that are also circle by minimal forbidden induced subgraphs.

Resultados experimentales de BAC y PQ adsorbidos en MMT La mayoría de los estudios sobre surfactantes adsorbidos en arcillas se han centrado en mejorar la reactividad superficial de la arcilla para eliminar contaminantes. Sin embargo, este trabajo de investigación se estudió exhaustivamente cómo la presencia de tensioactivos en medios acuosos puede afectar a la adsorción de otras especies en la superficie de la arcilla. En un estudio anterior se observó que la adsorción de contaminantes catiónicos como el herbicida paraquat (PQ) y el metal pesado cadmio sobre la superficie de la arcilla montmorillonita (MMT) se ve afectada por la presencia del surfactante BAC. En el presente conjunto de datos de investigación se analizó el mecanismo del comportamiento competitivo entre PQ y BAC sobre MMT mediante la combinación de estudios experimentales complementados con un modelo teórico. Este modelo es conocido ya que describió el intercambio de cationes simples (por ejemplo, Na+, K+, Mg2+ y Ca2+) sobre minerales arcillosos. Aunque se aplicó satisfactoriamente para aclarar el intercambio entre los iones mencionados, hasta donde sabemos, este modelo no se ha utilizado para estudiar el intercambio entre cationes orgánicos más grandes como PQ y BAC.

One-hour social and reproductive behavioral time series of Japanese quail in diverse social environments We favor the conformation of divergent social environments by using the preselecting animals based on a combination of the 4 behavioral tests described in the project description. Social groups composed of three adult quail, 2 females and 1 male (156-171 days old). We evaluated social and reproductive behavior in these groups. Groups were housed in a white wooden apparatus measuring 80 x 40 x 40 cm (width x length x height, respectively) with wood-shavings on the floor. A feeder and an automatic nipple drinker were positioned in opposite corners of the apparatus. Nylon monofilament line was extended over the top of the boxes with a 1 cm separation in order to prevent the birds from escaping without interfering with their visualization. A video camera was suspended 1.5m above the box. Since only 4 social groups could be tested simultaneously, the setup was repeated 3 consecutive times. For convenience boxes in which each social group were placed were numbered 1-12, where boxes 1-4 were tested simultaneously first, 5-8 second and 9-12 last. We used the ANY-MAZE@ to register the following behaviors as described in Caliva et al. (2017) during a one-hour period between 9 and 10 am inmediatly after placing in box (Day1) after 48h of habituation to the novel setting (Day3): Pecks: when one bird raises its head and vigorously pecks the other bird?s body (usually on the head). Grabs: when a male catches (?grabs?) with their beak the neck or head region of the female. Mounts: while performing a grab, the male approaches a female from behind, and places both feet on the dorsal surface of its torso, stepping over the females? tail. Cloacal contacts: during mounting, the male lifts his tail and tilts his pelvis underneath the other bird and briefly presses its cloaca against the female. Threats: one bird stands with its neck and head raised in front of the other bird that usually has its head at a lower level than the first. Chase: a bird runs after another that is escaping. Foraging: pecking at the ground or actively moving litter with beak. Feeding: peaking at food in the feeding trough. Dust bathing: vertical wing shakes in a lying position . Time series denote with the number one changes towards actively performing the given behavior, while the number zero indicates cessation of that behavior. All time series are stored as text files (.txt). Considering that the 36 animals were evaluated in 12 mixed-sex groups of 3 birds in individual experimental boxes, each subject quail was identified by their experimental group number (Box), ID number of wing band, and sex (femaleA, femaleB or male). In the case of females an indication A or B is used to discriminate between the two. In the file name an indication of the corresponding bird is provided as "BoxNº_IDNº_sex_DayNº" Data descriptor submitted to Sci Data "High resolution behavioral time series of Japanese quail within their their social environment"

Emergent networks in fractional percolation Es el algoritmo que se usó para la siguiente publicación: Valdez, Lucas D., and L. A. Braunstein. "Emergent networks in fractional percolation." Physica A: Statistical Mechanics and its Applications 594 (2022): 127057.

Rearranging Marital Settlement Agreements post-pandemics; Revisión de los acuerdos económicos post divorcio ante la crisis Gonzalez, Eliana Mabel Los efectos de la pandemia pueden medirse no sólo por su impacto directo en la salud de la población, sino también por sus efectos colaterales. Este trabajo examina el posible impacto de la crisis en los acuerdos económicos post divorcio. La pandemia pudo haber provocado que la situación económica de las partes haya cambiado drásticamente, incluso en algunos casos de forma permanente, desencadenando un incumplimiento de estos acuerdos. Incluso pueden haberse modificado las circunstancias que habían sido tenidas en cuenta por las partes o por los jueces para atribuir algunos derechos. Por ello, nos preguntamos si los acuerdos que contemplan previsiones económicas post divorcio podrían ser revisados. Si bien el legislador argentino ha previsto expresamente que el convenio homologado o la decisión judicial puedan ser revisados si la situación se ha modificado sustancialmente (Art.440), la diferente naturaleza jurídica de cada uno de los dispositivos (alimentos, atribución del uso de la vivienda, compensaciones económicas, distribución de bienes, etc.) amerita un tratamiento diferenciado. Entre los recursos que nos ofrece el Derecho Privado Argentino vigente, destacamos la posibilidad de aplicar la Teoría de la imprevisión, cuando la prestación a cargo de al menos una de las partes se ha tornado excesivamente onerosa por una alteración extraordinaria de las circunstancias. Por esta vía podría obtenerse la resolución del convenio o tal vez su reajuste. Son tiempos difíciles, y requieren de la mejor predisposición de todos para pensar soluciones creativas y temporarias, en términos de necesidades y posibilidades, atendiendo a las circunstancias excepcionales que pueden estar atravesando las partes, sobre todo los más vulnerables. En este contexto, es esencial crear un clima colaborativo; pero también que la mala conducta de las partes durante la crisis sea duramente sancionada. Finalmente, un criterio que no puede soslayarse es el impacto desproporcionado de la crisis en sujetos vulnerables (mujeres, niños, adultos mayores, etc.), que siempre deberá inclinar la balanza en favor de su protección.; The effects of the pandemic can be measured not only by its direct impact on the health of the population, but also by its collateral effects. This paper examines the possible impact of the crisis on marital settlement agreements. The pandemic might have caused personal financial situations to change dramatically, some permanently, which could be the trigger of contract breach. Also, the lockdown might have modified the circumstances that have been taken into account by the parties when making those agreements. We therefore wonder if these agreements could be reviewed. The Argentinian legislator has provided that an approved agreement or even a judicial decision can be reviewed if the situation has changed substantially (Article 440 Argentinian Civil and Commercial Code). However, the different legal nature of these financial provisions (alimony, child support, attribution of the use of the marital home, economic compensation, property distribution, etc.) forces us to adopt a differentiated approach. Among the legal tools offered by our Private Law, we highlight the possibility of applying the ‘Theory of Unpredictability’ which takes place when the contractual duties have become excessively onerous due to an extraordinary alteration of the circumstances. As a result, the contract could be renegotiated (which would permit its continuation), or terminated. During these difficult times, it is essential to find creative solutions, taking into account the exceptional circumstances the parties may be going through (especially the most vulnerable) and their needs and possibilities. It is vital to build a collaborative climate; but also, that the misconduct of the parties during the crisis is severely punished. Finally, a criterion that cannot be ignored is the disproportionate impact of the crisis on vulnerable individuals (women, children, elderly, etc.), which must always tip the balance in favor of their protection.

Izquierda y derecha peronista como categorías de análisis o los 34 días de disputa institucional en torno a la Universidad de Buenos Aires, 1974; Peronist Left and Peronist Right as Analytic Categories or 34 Days of Institutional Disputes around the University of Buenos Aires, 1974 Friedemann, Sergio Martín El artículo contribuye al debate acerca de la pertinencia de las categorías de izquierda y derecha para abordar los conflictos intraperonistas de los 60/70 en Argentina. A través de fuentes orales y escritas, se analizan las disputas en torno a las políticas universitarias entre la Universidad de Buenos Aires y el Poder Ejecutivo Nacional a poco de comenzar el gobierno de Isabel Perón. Asimismo, se observan posiciones moderadas, centristas o con pretensión de equidistancia, concluyendo que izquierda y derecha peronista resultan categorías válidas como polos de un continuum más que como expresiones dicotómicas y excluyentes, aún en un contexto de polarización y competencia centrífuga.; This paper contributes to the debate on the pertinence of the categories of Left and Right to address the conflicts within Peronist factions in Argentina during the seventies. Through oral and written sources, it analyzes the disputes on higher education policies between the University of Buenos Aires and the National Executive Power shortly after the beginning of Isabel Perón’s government. Additionally, moderates, centrists, and so claimed equidistant positions are observed, concluding that Left and Right Peronism are valid categories as poles of a continuum rather than as dichotomous and mutually exclusive expressions, even in a context of polarization and centrifugal competition within the party.

Testing the monophyly of Chaetarthriinae (Coleoptera, Hydrophilidae) and the phylogenetic position of Guyanobius with larval characters Archangelsky, Miguel; Rodriguez, Valeria Georgina; Torres, Patricia Laura Maria The subfamily Chaetarthriinae includes morphologically distinct larvae that are adapted to a diversity of environments. Based on larval characters, cladistic analyses (maximum parsimony (MP) and Bayesian inference (BI) with homoplasy as a partitioning scheme) were performed to test the monophyly of the subfamily and the relationships of the two tribes included in it: Chaetarthriini and Anacaenini. The chaetotaxy of a third instar larva Guyanobius adocetus is described and illustrated in detail, including morphometric characters. This larva is compared to those of the known larvae of the tribe Chaetarthriini belonging to the genus Chaetarthria, and Pseudorygmodus, Crenitis, and Crenitulus from Anacaenini. None of the unconstrained analyses recover Chaetarthriinae as monophyletic. Chaetarthria diverges in an early branch, probably due to a series of unique morphological modifications associated with a riparian lifestyle whereas Guyanobius appears closely related to Anacaenini. Two alternative positions of Guyanobius are revealed: (1) as sister of all Anacaenini (unconstrained MP) or (2) nested within Anacaenini as sister of Crenitis + Crenitulus (constrained MP and unconstrained BI). The genera Paracymus and Tormus (tribe Laccobiini) diverge as two successive branches subordinate to Chaetarthriinae (excluding Chaetarthria) in the unconstrained MP analysis. However, the support is rather weak, and the position of Paracymus and Tormus is an artifact produced by some homoplastic characters. In this regard, homoplasy partitioning resulted a useful technique to solve some artifacts generated by convergent morphologies.

Mathematical models for rescheduling Ecuador's 2020 professional football league season disrupted by COVID-19 Duran, Guillermo Alfredo; Guajardo, Mario; zamorano, gonzalo The year 2020 saw the world turned upside down by the coronavirus pandemic. Countless human activities were suspended or cancelled as the virus spread across the globe. In this paper, we show how the regular season matches of Ecuador's professional football league were rescheduled due to the disruption caused by the pandemic. As with many others, this league had to reschedule its remaining games to fit within in a much shorter period of time than originally planned. To address this problem, we developed two mathematical models that designed new match calendars. The first one, a round assignment model, rescheduled the various rounds in the season still to be played while the second one, a day assignment model, took the solutions of the first model as input to assign the matches within each round to specific days. The implementation of our models secured a well-balanced number of days off before each match across all of the teams. Also, it enabled the league to conclude a full season without cancelling any matches or changing the schedule format, unlike what occurred in many other leagues, and won the approval of all stakeholders including league officials, players, team coaches, the TV broadcaster and fans.

Algunos apuntes acerca de la controversial relación teórica entre comunicación audiovisual y narración; Some Notes about the Controversial Theoretical Relationship between Audiovisual Communication and Narrative Figueredo, Mauro Horacio En este trabajo nos proponemos trazar algunas reflexiones exploratorias en el campo de la comunicación audiovisual. Nos interesa, particularmente, deconstruir la indisoluble relación entre la «matriz narrativa» y los «distintos dispositivos audiovisuales» que performan las gramáticas tecnoperceptivas. En otras palabras, buscamos repensar las continuas discontinuidades, es decir, el «lazo» y la «diferencia» de la comunicación audiovisual con la narración.; This paper attempts to draw some exploratory reflections within the field of audiovisual communication. We are particularly interested in a deconstruction of the indissoluble relationship between the “narrative matrix” and the “different audiovisual devices” that perform techno-perceptive grammars. In other words, we expect to rethink the continuous discontinuities configurating both the nexus and the difference between the audiovisual communication and the narrative.

Core and strongly core orthogonal matrices Ferreyra, David Eduardo; Malik, Saroj B. In this paper we define two new concepts for a pair of complex square matrices of the index at most 1, the core orthogonal pair and strongly core orthogonal pair. The relationship between core orthogonality (resp. strong core orthogonality) and associated projectors of a pair of matrices is established. Using the core commutativity of two matrices of the index at most 1, a characterization of strongly core orthogonal matrices is also provided. We give several sufficient conditions under which a given pair of matrices is core orthogonal (resp. strongly core orthogonal). A canonical form for a pair of core orthogonal (resp. strong core orthogonal) matrices is developed to obtain characterizations of core orthogonality (resp. strongly core orthogonality). The properties of core orthogonality, strong core orthogonality, core additivity, and rank additivity are studied and their possible interrelationships are discussed. Further, connections of each one of these with the core partial order are also investigated.

Peces fósiles de Monte Bolca (Verona, Italia) en el Museo de Ciencias Naturales y Antropológicas “Profesor Antonio Serrano”, Paraná, Provincia de Entre Ríos, Argentina; Fossil fishes from Monte Bolca (Verona, Italy) at the Museum of Natural and Anthropological Sciences “Prof. Antonio Serrano”, Paraná, Entre Ríos Province Bogan, Sergio; Agnolin, Federico; Ibargoyen, Graciela María En esta contribución se busca visibilizar un conjunto de fósiles procedentes de la conocida localidad fosilífera de Monte Bolca, Verona, Italia. El conjunto forma parte del patrimonio paleontológico que resguarda el Museo de Ciencias Naturales y Antropológicas “Prof. Antonio Serrano” de Paraná, Entre Ríos. Los materiales fueron adquiridos del Museo Cívico de Verona por el Dr. Joaquín Frengüelli y fueron donados al Museo durante las primeras décadas del siglo XX, probablemente en la década de 1920, en el lapso en el que Frengüelli dictó clases de Geología y Paleontología en la Facultad de Ciencias de la Educación de la Universidad Nacional del Litoral en la ciudad de Paraná. Esta colección se compone de 19 piezas, 6 de las cuales corresponden a restos de peces y 13 son restos vegetales. Los materiales cuentan con sus etiquetas originales y números establecidos por el Museo Cívico de Verona. En el trabajo buscamos destacar el conjunto de peces. De la revisión de los materiales surge que el conjunto se integra únicamente por teleósteos y todos proceden del Eoceno de Bolca, de igual forma en la colección se conservan varias improntas de vegetales típicos de este sitio. El análisis del conjunto permitió separar algunos fósiles de vegetales que proceden de otra localidad del norte de Italia: Chiavon sitio de Vicenza que data del Oligoceno medio. A lo largo del texto se busca destacar la figura de Frengüelli, especialmente en su etapa inicial de trabajo científico en Paraná y buscamos trasmitir el valor histórico que presentan los materiales, sumando la importancia paleontológica que representan los fósiles de peces de Monte Bolca en un contexto general.; In this contribution, we seek to make visible a set of fossils from the well-known fossiliferous locality of Monte Bolca, Verona, Italy. The set is part of the paleontological heritage that protects the Museum of Natural and Anthropological Sciences “Prof. Antonio Serrano” of Paraná, Entre Ríos. The materials were acquired from the Civic Museum of Verona by Dr. Joaquín Frengüelli and were donated to the Museum during the first decades of the 20th century, probably in the 1920s, during the period in which Frengüelli teach Geology and Paleontology at the Educational Sciences Faculty, Universidad Nacional del Litoral in Paraná city. This collection is made up of 19 pieces, 6 of which correspond to fish remains and 13 are plant remains. The materials had their original labels and numbers established by the Civic Museum of Verona. In this work, we seek to highlight this set of fish. From the review of the materials, it emerges that the group is made up only of teleosts and all of them come from the Eocene of Bolca. Likewise, several plant imprints typical of this site are preserved in the collection. The analysis of the assemblage made it possible to separate some fossil plants that come from another locality in northern Italy: the Chiavon site of Vicenza, dating from the middle Oligocene. Throughout the text, we seek to highlight the figure of Frengüelli, especially in his initial stage of scientific work in Paraná, and we seek to convey the historical value that the materials present, added to the paleontological importance that the fish fossils of Monte Bolca represent in a general context.

Habilidad competitiva de cultivares comerciales de trigo pan de la Argentina Figueruelo, Andrea Mariana; Dillchneider Loza, Alexandra; Porta Siota, Fernando; Funaro, Daniel Oscar La habilidad competitiva es la capacidad de una especie de capturar recursos limitantes cuando crece en mezclas con otras especies y puede variar por las condiciones ambientales. La competitividad de los diferentes cultivares de trigo es una herramienta que contribuye con el manejo de malezas en sistemas de bajos insumos. Mediante el índice de agresividad (IA), durante el año 2020 fueron evaluados, en INTA EEA Anguil, 21 cultivares comerciales de trigo pan (Triticum aestivum L.), tomando como especiecompetidora a Avena sativa L. (cv. Florencia INTA). El diseño utilizado fue en franjas con tres repeticiones en bloques para cada tratamiento: (i) trigo, (ii) trigo + avena, (iii) avena. La siembra fue el 5 de julio del 2020 a una densidad de 220 y 180 pl m-2 para trigo y avena, respectivamente. Se midió la biomasa seca en dos momentos fenológicos, macollaje (Z2.3) y a cosecha (Z9) y se calculó el IA en ambos estados (IAm y IAc respectivamente). El IAm presentó valores entre 0,08 y 0,57 sin diferencias significativas entre los cultivares evaluados. El IAc varió entre -0,45 y 0,68. Cedro y MS INTA 119 fueron los cultivares menos competitivos y presentaron diferencias con el resto de los cultivares, sin presentar diferencias entre sí. Se destacan con mayor habilidad competitiva K. Serpiente, K. Mercurio, K. 100 años, K. Liebre, ACA 365, Buck Bellaco, Lapacho, SY 211, Buck Peregrino, Guayabo y Buck Destello con valores de IAc> 0,3. El IAc explicó el 65% de la variabilidad en el rendimiento relativo en granos.; Competitive ability is the capacity of a spe - cies to capture limiting resources when it grows in mixtures with other species and can vary due to environmental conditions. The competitiveness of the different wheat cultivars is a tool that contributes to the man - agement of weeds in low-input systems. Us - ing the aggressiveness index (AGR), during the year 2020, 21 commercial cultivars of bread wheat (Triticum aestivum L.) were evaluated in INTA EEA Anguil, taking as a competing species Avena sativa L. (cv. Florence INTA). The design used was in strips with three replications in blocks for each treatment: (i) wheat, (ii) wheat + oats, (iii) oats. Planting was on July 5, 2020 at a density of 220 and 180 pl m-2 for wheat and oats, respectively. Dry biomass was measured at two phenological moments, potting (Z2.3) and harvest (Z9) and ai was calculated in both states (AGRm and AGRc respectively). The AGRm presented values between 0.08 and 0.57 without significant differences between the cultivars evaluated. The AGRc ranged from -0.45 to 0.68. Cedro and MS INTA 119 were the least competi - tive cultivars and presented differences with the rest of the cultivars, without presenting differences between them. Stand out with greater competitive hability K. Serpiente, K. Mercurio, K. 100 years, K. Liebre, ACA 365, Buck Bellaco, Lapacho, SY 211, Buck Peregrino, Guayabo and Buck Flash with values of AGRc> 0.3. The AGRc explained 65% of the variability in relative yield in grains.

Efecto del 17α-etinilestradiol (EE2) como perturbador endócrino reproductivo en el pez Aequidens metae; Effect of 17α-ethinylestradiol (EE2) as a reproductive endocrine disruptor in the fish Aequidens metae Pahí Rosero, Ana María; Velasco Santamaría, Yohana María El 17α-etinilestradiol (EE2) es un esteroide sintético que interfiere en el sistema endócrino reproductivo de los peces. En este estudio se evaluó el efecto del EE2 como posible perturbador endócrino en hembras y en machos adultos de Aequidens metae expuestos a 0.5, 5, 50 y 250 ng/L por 21 días. Se incluyó un testigo negativo (C) y un testigo con solvente (etanol) (CE). Finalizada la exposición al EE2, la sangre fue colectada para determinar calcio y fósforo plasmático y en las gónadas e hígado se evaluaron los índices somáticos y las alteraciones histológicas. Los índices gonadosomático y hepatosomático no presentaron diferencias significativas. A nivel histológico, en los ovarios se encontró congestión, fibrosis intersticial, apoptosis, atresia y material vitelogénico. A nivel testicular, se observó acumulación de material de melanomacrófagos, degeneración testicular, fibrosis intersticial, atrofia y engrosamiento de la pared intersticial. Y en hígado, en ambos sexos, se observó mayor picnosis degenerativa, activación de macrófagos, apoptosis, infiltraciones, dilatación y congestión, en comparación con los grupos testigo. Las hembras no presentaron diferencias significativas en calcio y fósforo plasmático. Los machos expuestos a las tres concentraciones más altas tuvieron valores significativamente mayores en el calcio plasmático en comparación con el grupo testigo. Con respecto al fósforo plasmático, en los machos expuestos a 250 ng/L se presentaron diferencias en comparación con el grupo testigo. Estos resultados permiten inferir que esta especie es sensible a los efectos de la perturbación endocrina generados por el EE2, y que la determinación de parámetros bioquímicos como los iones de calcio y fósforo pueden ser usados como biomarcadores adicionales del estado de salud de los peces expuestos a xenobióticos.; The 17α-ethinylestradiol (EE2) is a synthetic steroid that interferes with the reproductive endocrine system of fish. This study evaluated the effect of EE2 as a possible endocrine disruptor in adult Aequidens metae females and males exposed to 0.5, 5, 50, and 250 ng/L for 21 days. Negative control and solvent control (ethanol) were included. After exposure, blood was collected to determine plasma calcium and phosphorus, and somatic indices and histology changes were evaluated in the gonads and liver. The gonadosomatic and hepatosomatic indices did not present significant differences. At histological level, congestion, interstitial fibrosis, apoptosis, atresia, and vitellogenic material were found in the ovary. At the testicular level, accumulation of melanomacrophage material, testicular degeneration, interstitial fibrosis, atrophy and thickening of the interstitial wall were observed. In the liver, in both sexes, was observed greater degenerative pyknosis, activation of macrophages, apoptosis, infiltrations, dilatation and congestion compared with the control groups. Females did not show significant differences in plasma calcium and phosphorus between treatments. The males exposed to the three highest EE2 concentrations had significantly higher values in plasma calcium compared to control group. Regarding plasma phosphorus, in males exposed to 250 ng/L there were differences compared to control groups. The results allow inferring that this species is sensitive to endocrine disruption effects generated by EE2 and that the determination of biochemical parameters such as plasma calcium and phosphorus ions can be used as additional biomarkers of the health status of fish exposed to xenobiotics.