Reading comprehension in undergraduates during the COVID-19 pandemic: Associations with executive function difficulties, reading habits and screen times Tabullo, Angel Javier; Chiofalo, María Florencia; Wainselboim, Alejandro Javier The COVID-19 pandemic and its concomitant restriction measures drastically altered the routines and learning formats of students from all levels. In addition, it has been shown that pandemic-related stress negatively impacted their mental health and cognitive functioning. Undergraduates have been signaled out as one of the populations most vulnerable to pandemic-related stressors. The following work examined the link between executive functions, perceived stress and reading comprehension among Argentinean university students during lockdown measures. In addition, potential effects of reading habits and screen exposure were considered. An executive function behavioral rating scale (ADEXI), a reading comprehension test and the PSS-10 stress questionnaire were administered to two-hundred social science students through an online survey. Executive difficulties increased with perceived stress, while lower inhibition was associated with longer TV times and being male. Stress and executive function associations can be interpreted as a detrimental effect, reverse or bidirectional causation. In turn, working memory issues led to worse comprehension (mediating the impact of perceived stress) while distal factors such as print exposure and mother education were positive predictors of reading outcomes (as expected). This finding suggests that undergraduates’ difficulties to manipulate online information interfered with expository text processing, resulting in poorer comprehension performance.

Enseñanza de matemáticas y ajustes razonables: Relato de una experiencia universitaria; Teaching Mathematics and reasonable accommodation: An account of a university experience Andrini, Leandro Ruben En este trabajo se relatará una experiencia particularllevada a cabo por un equipo de docentes de las dos primeras materias de la Lic. en Matemática, dictada en el Departamento de Matemática de la Facultad de Ciencias Exactas de la Universidad Nacional de La Plata. Esta experiencia fue coordinada desde la Dirección de Inclusión, Discapacidad y Derechos Humanos y la Secretaría de Asuntos Académicos de la Facultad, con amplia asistencia de la Dirección de Inclusión, Discapacidad y Derechos Humanos de la universidad, la que estuvo fundamentada atendiendo a las políticas de “ajustes razonables” consagradas en la Convención sobre los Derechos de las Personas con Discapacidad.; In this work a particular experience will be reported that was carried out by a team of teachers of the first two academic subjects of theDegree in Mathematics, dictated in the Department of Mathematics of the Faculty of Exact Sciences of the National University of La Plata. This experience was coordinated from the Directorate of Inclusion, Disability and Human Rights and theAcademicSecretariat of the Faculty, with extensive assistance of the Directorate of Inclusion, Disability and Human Rights of the University, based on the policies of“reasonable accommodation”enshrined in the Convention on the Rights of Persons with Disabilities.

Agendas mediática y pública en campaña electoral: Argentina, Ecuador y España; Media and public agendas in electoral campaigns: Argentina, Ecuador and Spain Rodríguez Díaz, Raquel; Chavero, Palmira; Aruguete, Natalia Las campañas electorales, afirma Maxwell McCombs (2004), son “laboratorios naturales” para analizar cuán cerca o cuán lejos se encuentran las propuestas programáticas de los partidos políticos, los asuntos tematizados mediáticamente y las preocupaciones que los públicos expresan en el ágora. Este artículo aporta un análisis comparativo en dos sentidos. Por un lado, sistematizamos las similitudes y diferencias existentes en las coberturas mediáticas de tres campañas de elecciones generales (Ecuador 2021, España 2019 y Argentina 2019), en base a indicadores relativos a la “agenda de temas” y la “agenda de atributos” (1° y 2° nivel de agenda setting). Por otro lado, exploramos las asociaciones existentes entre los temas destacados en las agendas mediáticas y públicas, en el marco de estas tres campañas electorales.Entre los resultados a los que arribamos, se destaca, en primer lugar, la disociación entre las principales preocupaciones expresadas por la opinión pública y los temas más destacados en los medios de referencia de los tres países, de tal manera que los medios (agenda mediática) ofrecen más visibilidad a los temas de conflicto político que a los temas de preocupación ciudadana (agenda pública). En segundo lugar, las agendas de los medios analizados a través de un análisis de contenido de los diarios El Comercio de Ecuador, El País de España y Clarín de Argentina se asemejan respecto de los temas menos experienciales [unobstrusive] (Zucker, 1978), tales como la corrupción o la actividad política, y se distinguen claramente en aquellos asuntos que encarnan los conflictos políticos y sociales propios de estos países.; Maxwell McCombs (2004) defines electoral campaigns as "natural laboratories" for analyzing how near or far the proposals of the programs of political parties, the issues as set out by the media and the concerns expressed by the general public are from each other. This article contributes a comparative analysis in two ways. On the one hand, it systematizes the existing similarities and differences in the media coverage of three general election campaigns (Ecuador 2021, Spain 2019 and Argentina 2019), based on the indicators concerning "issue agendas" and "attribute agendas" (1st and 2nd level of agenda setting). On the other hand, it explores the existing associations between the most significant issues of the media and public agendas in the framework of the three aforementioned electoral campaigns. Among the results obtained, it is worth pointing out, firstly, the dissociation of the main concerns expressed by public opinion and the most prominent issues in the main media of the three countries. In other words, the media (media agenda) give greater visibility to issues of political conflict than to issues of concerns of the citizens themselves (public agenda). Secondly, the agenda of the media studied using a content analysis of the following daily newspapers: El Comercio (Ecuador), El País (Spain) and Clarín (Argentina), is like the most unobtrusive issues (Zucker, 1978), such as corruption or political activity. They are clearly different from those issues which feature in the political and social conflicts of those countries.

Co-integrate Col3m bla NDM-1 -harboring plasmids in clinical Providencia rettgeri isolates from Argentina de Belder, Denise Gisele; Martino, Florencia; Tijet, Nathalie; Melano, Roberto G.; Faccone, Diego Francisco; de Mendieta, Juan Manuel; Rapoport, Melina; Albornoz, Ezequiel Pablo; Petroni, Alejandro; Tuduri, Ezequiel; Derdoy, Laura; Cogut, Sandra; Errecalde, Laura; Pasteran, Fernando; Corso, Alejandra; Gómez, Sonia Alejandra The first cases of blaNDM in Argentina were detected in three Providencia rettgeri (Pre) recovered from two hospitals in Buenos Aires city in 2013. The isolates were genetically related, but the plasmid profile was different. Here, we characterized the blaNDM-1-harboring plasmids of the first three cases detected in Argentina. Hybrid assembly obtained from short- and long-read sequencing rendered blaNDM-1 in Col3M plasmids of ca. 320 kb (p15268A_320) in isolate PreM15268, 210 kb (p15758B_210) in PreM15758, and 225 kb (p15973A_225) in PreM15973. In addition, PreM15758 harbored a 98-kb circular plasmid (p15758C_98) flanked by a putative recombination site (hin-TnAs2), with 100% nucleotide ID and coverage with p15628A_320. Analysis of PFGE/S1-nuclease gel, Southern hybridization with blaNDM-1 probe, hybrid assembly of short and long reads suggests that pM15758C_98 can integrate by homologous recombination. The three blaNDM-1-plasmids were non-conjugative in vitro. Moreover, tra genes were incomplete, and oriT was not found in the three blaNDM-1-plasmids. In two isolates, blaNDM-1 was embedded in a partially conserved structure flanked by two ISKox2. In addition, all plasmids harbored aph(3')-Ia, aph(3')-VI, and qnrD1 genes and aac(6´)Ib-cr, blaOXA-1, catB3, and arr3 as part of a class 1 integron. Also, p15268A_320 and p15973A_225 harbored blaPER-2. To the best of our knowledge, this is the first report of clinical P. rettgeri harboring blaNDM-1 in an atypical genetic environment and located in unusual chimeric Col3M plasmids. The study and continuous surveillance of these pathogens are crucial to tracking the evolution of these resistant plasmids and finding solutions to tackle their dissemination.

A model-based supersaturation estimator (inferential or soft-sensor) for industrial sugar crystallization process Morales Gonzalez, Humberto; Di Sciascio, Fernando Agustín; Aguirre Zapata, Estefanía; Amicarelli, Adriana Natacha The degree of supersaturation of the mother liquor is a key factor in improving the monitoring and control of the final stage of industrial sugar crystallization. However, the difficulty of obtaining online supersaturation measurements is one of the challenges associated with monitoring and controlling sugar crystallization. There is no direct method or single instrument for measuring supersaturation. It can only be calculated or inferred from other measurements. In the literature, estimators of mother liquor supersaturation are reported, typically focused on the first stage of crystallization. The SeedMaster series transmitters are the sole industrial instruments that provide online supersaturation information by calculating it from external measurements. The purpose of this study is to design a first-principles model-based soft-sensor as a practical alternative to obtain real-time information about supersaturation in the last stage of sugar crystallization. The proposed estimator relies on two models: a supersaturation model and a second simplified model of the last stage of crystallization. The parameters of both models were estimated based on real industrial data. The estimation is performed in three steps: 1. An Unscented Kalman Filter estimates the states of the crystallization model and their variance. 2. The estimated supersaturation value is obtained by substituting the estimated states into the supersaturation model. 3. The estimator's bias, and variance are calculated to establish error bounds. The main characteristics of the obtained estimator are: practical unbiasedness, nearly minimum variance and robustness. The performance and behavior of the supersaturation estimator are contrasted using real data from an industrial crystallization plant (Urbano Noris factory, Holguín, Cuba). Regardless of its initial conditions, the estimator converges to the three standard deviation error band in less than three minutes. The exact time may vary depending on how much the estimator's initial conditions deviate from those of the process. After this time (Reach Time), the estimates remain within the calculated error limits of three standard deviations. The maximum absolute errors obtained were less than 0.019 units, corresponding to a maximum relative error of less than 1.5%. These values are favorable since they are well below critical values (0.125 units of absolute error). Moreover, the error bands are much smaller than the operating zone width (approximately 0.25 units), which is a necessary condition for any supersaturation estimator to be useful. Finally, it should be noted that the errors have been reduced compared to the values reported in previous research focused on the sugar industry using other techniques.

Comprensión de oraciones con cláusulas relativas en niños de 6 a 11 años hablantes del español rioplatense; Relative clause sentence comprehension by rioplatense spanish-speaking children aged 6-11 years; Compreensão de frases com cláusulas relativas em crianças de 6 a 11 anos falantes do espanhol rioplatense Zamora, Dolores Jazmín; Barreyro, Juan Pablo; Sánchez, María Victoria; Martínez Cuitiño Carricaburo, María Macarena La comprensión de oraciones relativas ha sido el objeto de numerosas investigaciones en población infantil, pero pocas logran establecer la etapa en la que aquellas se adquieren y los estudios en español son escasos. El objetivo de esta investigación es comparar el desempeño de niños hablantes de español rioplatense en la comprensión de oraciones relativas. Se evaluaron 105 niños de tres grupos etarios—6-7, 8-9 y 10-11 años—en una tarea de comprensión oral de oraciones relativas de sujeto y de objeto. Los resultados muestran diferencias significativas en el rendimiento de los grupos. Los niños de todas las edades tienen dificultades para comprender relativas de objeto, mientras que el desempeño en relativas de sujeto varía según la posición en la que se encuentra incrustada la cláusula subordinada.; Relative clause comprehension has been the object of numerous investigations in children, but few have been able to establish the stage in which it is acquired, and research in Spanish is scarce. The aim of this study is to compare the performance of Rioplatense Spanish-speaking children in the comprehension of relative clauses. For that purpose, a total of 105 children from three age groups: 6-7, 8-9, and 10-11 years old, respectively, were assessed with an oral comprehension task of subject and object relative clauses. Results show significant differences in the performance of each group. Children of all ages have difficulty understanding object relative clauses, while performance in subject relative clauses depends on the position of the subordinate clause.; A compreensão de orações relativas tem sido objeto de inúmeras investigações em crianças, mas poucas conseguiram estabelecer o estágio em que ela é adquirida, e os estudos em espanhol são escassos. O objetivo deste estudo é comparar o desempenho de crianças falantes de espanhol rioplatenses na compreensão de orações relativas. Para isso, 105 crianças de três faixas etárias: 6-7, 8-9 e 10-11 anos, respectivamente, foram avaliadas com uma tarefa de compreensão oral de orações relativas de sujeito e objeto. Os resultados mostram diferenças significativas no desempenho dos grupos. Crianças de todas as idades têm dificuldade em compreender orações relativas ao objeto, enquanto o desempenho nas orações relativas ao sujeito depende da posição da oração subordinada.

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.