Experimental Data and Thermodynamic Modeling of Solid–Liquid and Liquid–Vapor Equilibria in the CO2 + Ethanol + Acetaminophen System Mattos, J. V.; Molina, Matías José; Rodriguez Reartes, Sabrina Belen; Ferreira Pinto Miñon, Claudio Leonardo; Zabaloy, Marcelo Santiago; Arce, P. F.; Cardozo Filho, L. In this study, experimental carry out of liquid-vapor and solid-liquid phase transitions were conducted for the ternary system {CO2 (1) + ethanol (2) + acetaminophen (3)} at different concentrations of paracetamol in ethanol for temperatures from 313 to 333 K and pressures up to 12 MPa. Experimental high pressure phase transition data were obtained using the static method in a variable volume view cell. Experimental data were compared with the literature for systems containing acetaminophen in a saturated solution. The presence of paracetamol in the binary system {CO2 (1) + ethanol (2)} significantly alters the behavior of the phase under the conditions of temperature and concentration studied. It was observed that in the ternary system {CO2 (1) + ethanol (2) + acetaminophen (3)} with a saturated solution at the lowest temperature, 313 K, CO2 acts as a cosolvent for mole fractions lower than 0.6. Thermodynamic simulations employing the Perturbed Chain Statistical Associating Fluid Theory (PC-SAFT) Equations of State (EoS) aligned the experimental results adequately. The observed minimal deviations in pressure and temperature validate the efficacy of the thermodynamic models applied in this study.

Registros de Poospiza nigrorufa y Poospiza whitii en Argentina Conjunto de registros del Sietevestidos Pampeano (Poospiza nigrorufa) y del Sietevestidos Serrano (Poospiza whitii), que incluye fecha, localidad, coordenadas geográficas y fuente de información. Estos datos fueron usados para generar los modelos de distribución potencial en el marco de un estudio de los limites de especie de estos dos taxones.

Cuestionario de evaluacion del estado emocional inducido mediante música La música tiene la capacidad de inducir diferentes estados emocionales en las personas (Juslin & Västfjäll, 2008). Esto ha promovido la implementación de intervenciones basadas en música en investigaciones acerca de los procesos emocionales y de su impacto sobre otros dominios cognitivos como la memoria (Diaz Abrahan et al., 2021; López et al., 2021; López, Yunes et al., 2024), el estrés académico (Gelerstein et al., 2024), la percepción del dolor (Asku, 2023), la calidad del sueño (Jespersen et al., 2023), entre otros. Para evaluar los estados emocionales inducidos por música se utilizan diferentes herramientas que cuantifican en qué medida la persona experimentó emociones predeterminadas durante la escucha (Zetner et al., 2008). Con el objetivo de considerar diferentes aspectos involucrados en las intervenciones basadas en música, se confeccionó un cuestionario que incluye herramientas validadas, así como también preguntas ad hoc que surgen de la práctica en investigación. El cuestionario evalúa estados emocionales subjetivos inducidos mediante intervenciones basadas en música, considerando diferentes aspectos que componen las experiencias emocionales subjetivas (López, Picco et al., 2024; López, Yunes et al., 2024). Se utiliza una escala basada en el esquema pictórico Self-Assessment Manikin (Bradley & Lang, 1994) para evaluar dos dimensiones emocionales provocado por la música: valencia (gradiente que se extiende entre la máxima tristeza y la máxima felicidad) y el arousal/nivel de activación (gradiente que abarca desde la máxima relajación a la máxima excitación). Teniendo en cuenta que la música es un fenómeno dinámico que se desarrolla en el tiempo, se evalúa la frecuencia con la que se experimentaron tales estados durante la experiencia de escucha. Además, se incluyen preguntas ad hoc de respuestas cerradas y abiertas orientadas a medir el gusto por la pieza musical, la familiaridad de la persona con la música, la inducción de otras emociones, la autopercepción de movimiento, la percepción del paso del tiempo, el estado de comodidad y la evocación de recuerdos autobiográficos durante la escucha.

Temperaturas corporales y ambientales para Telmatobius rubigo Se presentan tres conjuntos de datos: 1) Datos de temperaturas del agua y del aire del habitat de Telmatobius rubigo colectados durante los meses mas cálidos del año utilizando registradores automáticos de temperatura ambiental. 2) Datos de temperaturas corporales de Telmatobius rubigo colectados en sucesivos muestreos en la Puna jujeña. 3) Valores de temperatura crítica máxima para la especie. Estos datos se utilizaron para estimar la vulnerabilidad al calentamiento global de Telmatobius rubigo.

Effect of grasses on native tree seedling establishment along a water stress gradient: results of forest and greenhouse experiments Trinco, Fabio Daniel; Rusch, Verónica Elena; Cardozo, Andrea Gabriela; Garibaldi, Lucas Alejandro; Tittonell, Pablo Adrián Because of anthropogenic uses, such as cattle raising or forest clearings, some native forests show 17 an early successional grass stratum that can reduce or nullify native tree regeneration. We 18 hypothesize that increasing grass coverage lowers or nullifies native seedling establishment by 19 reducing or preventing water intake by the seed or seedling. The aim of this work is to assess the 20 effect of grasses over tree seedlings under varying soil water stress levels. We performed a field 21 experiment consisted of 36 experimental exclosures in two northwest Patagonian valleys, covering 22the regional gradient of altitude, rainfall, and tree canopy openness. We also conducted a 23 greenhouse experiment, consisted of 36 experimental pots with four levels of grass coverages, 24 under three levels of water stress. Correspondence has been observed between both experiments. 25 In the field experiment we found that the probability of finding an alive tree seedling is about 2.78 26 times higher in ungrassed sites compared to grassed ones. In the greenhouse experiment we found 27 that the presence of grasses reduced on average 43% the final number of established seedlings 28 over all irrigation levels, suggesting that a water competition process is occurring. Management 29 practices that induce the invasion of grass layer would negatively impact on tree regeneration in 30 forests that have not co-evolved with large herbivores. This situation can be exacerbated in regions 31 that show a water limitation in the growing season or where climate change can intensify water 32 stress conditions.

The evolution of low-mass central galaxies in the vicinity of massive structures and its impact on the two-halo conformity Palma, Daniela; Lacerna, Ivan; Artale, M. Celeste; Montero Dorta, Antonio D.; Ruiz, Andrés Nicolás; Cora, Sofia Alejandra; Rodriguez, Facundo; Pallero, Diego; O'Mill, Ana Laura; Choque Challapa, Nelvy We investigated the population of low-mass central galaxies with M⋆ = 109.5 − 1010 h−1 M⊙, inhabiting regions near massive groups and clusters of galaxies using the IllustrisTNG300 and MDPL2-SAG simulations. We set out to study their evolutionary histories, aiming to find hints about the large-scale conformity signal they produce. We also used a control sample of central galaxies with the same stellar mass range located far away from massive structures. For both samples, we find a subpopulation of galaxies accreted by another halo in the past, but now considered central galaxies; we refer to these objects as former satellites. The number of former satellites is higher for quenched central galaxies near massive systems, with fractions of 45% and 17% in IllustrisTNG300 and MDPL2-SAG, respectively. The differences in the numerical resolution of each simulation lead to the different fractions of former satellites. Our results in TNG300 show that former satellites “pollute” the sample of central galaxies because they suffered environmental processes when they were satellites hosted typically by massive dark matter halos (M200 ≥ 1013 h−1 M⊙) since z ≲ 0.5. After removing former satellites, the evolutionary trends for quenched central galaxies near massive structures are fairly similar to those of the quenched control galaxies, showing small differences at low redshift. For MDPL2-SAG instead, former satellites were hosted by less massive halos, with a mean halo mass around 1011.4 h−1 M⊙, and the evolutionary trends remain equal before and after removing former satellite galaxies. We also measured the two-halo conformity, that is, the correlation in the specific star formation rate between low-mass central galaxies and their neighbors at megaparsec scales, and how former satellites contribute to the signal at three different redshifts: z = 0, 0.3, and 1. The time evolution of the conformity signal in the simulations presents apparent contradictory results: it decreases from z = 0 to z = 1 in MDPL2-SAG, while it increases in TNG300. However, after removing former satellites in the latter, the signal is strongly reduced, but practically does not change at z ≤ 0.3, and it disappears at z = 1. We compare our findings with recent literature data and discuss the conformity measurements, as different approaches can lead to varying results.

Reliable replicative lifespan determination of yeast with a single-channel microfluidic chip Salzman, Valentina; Bustamante Torres, Moises Rene; Correa Tedesco, Francisco Gustavo; Tarkovski, Nahuel; Godás Willems, María José; Bravo, Joaquin Nahuel; Mercuri, Magali; Mercado, Dante G.; Berlin, Guido Matias; Bellino, Martin Gonzalo; Aguilar, Pablo Sebastián; Estrada, Laura Cecilia Saccharomyces cerevisiae is a powerful model for aging research due to its short lifespan and genetic malleability. Microfluidic devices offer an attractive approach enabling rapid monitoring of hundreds of cells during their entire replicative lifespan (RLS). Yet, key operational issues such as contaminations, cell loss, and cell-aggregates-dependent flow obstruction can hinder RLS experiments. We report the development of a microfluidic device configuration that effectively prevents flow blockage. We conducted comprehensive performance characterization, evaluating trapping efficiency, cell retention, budding orientation, and cell aggregate formation. The optimized device successfully supported long-term culturing and reliable RLS measurements of budding yeast strains. For accurate lifespan determination, a detailed workflow is provided that includes device fabrication, live microscopy setup, and characterization of cell age distribution. This work describes an accessible and reliable microfluidic device for yeast RLS studies, promoting further exploration in aging research.

Revisiting McGee’s Counterexample to Modus Ponens Rubin, Mariela; Lo Guercio, Nicolás Francisco In this paper, we provide a novel explanation of McGee’s (1985) alleged counterexample to Modus Ponens for indicative conditionals. Our strategy is to show that pragmatic phenomena interfere with intuitions concerning the acceptability of the inference. More specifically, we argue that two confounding factors at play affect our intuitions concerning the acceptability of the inference, neither of which is related to validity. First, the indefinite determiner phrase “a Republican” is ambiguous, to wit, it may receive either a specific or a non-specific reading (and as we shall see, substituting a disjunction or a definite description for the indefinite is of no help). Second, the conclusion triggers an ignorance inference concerning its antecedent. In light of this, we shall argue, McGee’s diagnosis must be rejected.

The Role of Deadwood in the Carbon Cycle: Implications for Models, Forest Management, and Future Climates Wijas, Baptiste J.; Allison, Steven D.; Austin, Amy Theresa; Cornwell, William K.; Cornelissen, J. Hans C.; Eggleton, Paul; Fraver, Shawn; Ooi, Mark K.J.; Powell, Jeff R.; Woodall, Christopher W.; Zanne, Amy E. Deadwood represents a significant carbon pool and unique biodiversity reservoir in forests and savannas but has been largely overlooked until recently. Storage and release of carbon from deadwood is controlled by interacting decomposition drivers including biotic consumers (animals and microbes) and abiotic factors (water, fire, sunlight, and freeze–thaw). Although previous research has focused mainly on forests, we synthesize deadwood studies across diverse ecosystems with woody vegetation. As changing climates and land-use practices alter the landscape, we expect accelerating but variable rates of inputs and outputs from deadwood pools. Currently, Earth system models implicitly represent only microbial consumers as drivers of wood decomposition; we show that many other factors influence deadwood pools. Forest management practices increasingly recognize deadwood as an important contributor to forest dynamics, biodiversity, and carbon budgets. Together, emerging knowledge from modeling and management suggests a growing need for additional research on deadwood contributions to carbon storage and greenhouse gas emissions.

Desafíos y transformación en la era digital: el programa de formación en alfabetización informacional de la Biblioteca Central UNSAM; Challenges and transformation in the digital era: the information literacy training program of the UNSAM Central Library Provenzano, Florencia Noemí; More, Sabrina Fernanda; Messina, Lara Amalia En este artículo las autoras reflexionan sobre la transformación de los serviciosbibliotecarios en apoyo a las nuevas necesidades y expectativas de la comunidaduniversitaria, con especial mención al servicio de referencia y el rol educativo de lasbibliotecas. Se destaca la contribución de la biblioteca para el desarrollo de lasactividades sustantivas de la institución y se presenta el caso de la Biblioteca Central dela Universidad Nacional de San Martín, que desde su creación y puesta en marcha en2010 diseñó e implementó un programa de formación en Alfabetización Informacional(ALFIN) que continúa en crecimiento. Se expone la evolución del programa ALFIN, susinicios y adaptaciones a los contextos vividos, manteniendo siempre la premisa demejorar en pos de las necesidades de los usuarios. Se concluye enfatizando laimportancia del trabajo colaborativo con las distintas áreas de la universidad para lograrun servicio transversal e integrador.; In this article the authors reflect on the transformation of library services in support of the new needs and expectations of the university community, with special mention to the reference service and the educational role of libraries. The contribution of the library to the development of the substantive activities of the institution is highlighted and the case of the Central Library of the National University of San Martín is presented, which since its creation and launch in 2010 designed and implemented a training in Information Literacy (ALFIN) that continues to grow. The evolution of the ALFIN program is explained, its beginnings and adaptations to the contexts experienced, always maintaining the premise of improving in pursuit of the needs of the users. It concludes by emphasizing the importance of collaborative work with the different areas of the university to achieve a transversal and integrative service.

Readings and Uses of Arendt in Latin America: Milestones of her Reception in Argentina, Mexico and Colombia Di Pego, Anabella Der Beitrag untersucht die Arendt-Rezeption in Lateinamerika unter besonderer Berücksichtigungder wichtigen Stationen in Mexiko, Kolumbien und Argentinien. Ich befasse mich mit frühen Veröffentlichungen und Übersetzungen von Arendts Texten sowie mit ihrer Lektüre in Mexiko und Kolumbien durch progressive liberale Kräfte in den 1970er-Jahren. In Argentinien fand Arendt Anklang im linken (akademischen und militanten) Sektor. Ab den 1980er-Jahren gab es eine breite Rezeption von Arendts Denken, die ersten Bücher über Arendt wurden veröffentlicht. Ihr Denken wurde im Zusammenhang mit den Verbrechen der Militärdiktaturen und im Transitionsprozess zur Demokratie genutzt und neu angeeignet.

Robust Controller Design for a Grid-Connected VSI via an LCL Filter in the Presence of Unknown Grid Impedance Gonzalez, Juan Manuel; Busada, Claudio; Solsona, Jorge Alberto Inverters connected to the grid can become unstable under specific grid impedance conditions. In order to find a solution to this problem, it is possible to ensure system stability and their robustness to R-L type grid impedances by satisfying two conditions. The first condition is to ensure that the closed-loop poles of the system are in stable positions to variations in the grid impedance. The second condition is reliant on the admittance model of the equivalent circuit. Specifically, the product of this admittance and the grid impedance must adhere to the Nyquist stability criterion. In this work, the stability of the converter connected to the grid through an LCL filter is analysed. For this purpose, the output admittance is modelled in the Laplace domain taking into account the behaviour of the discrete controller. In addition, to ensure that the closed-loop poles are in stable positions, the system open-loop response is analysed. These two conditions are examined across scenarios where system states are partially or completely fed back, for different system parameter values. Consequently, a robust controller is designed for variations of the R-L type grid impedance.

Seasonal seminal quality variations and vitrification prospects in black flounder Paralichthys orbignyanus Zalazar, Lucia; Nicolli, Anabella Rita; López, A. V.; Radonic, J. M.; Cesari, Andreina Long-term preservation of gametes has been identified as a tool to improve broodstock management and increase the number of juveniles produced by artificial fertilization. Paralichthys orbignyanus is an important commercial and recreational species distributed in marine and estuarine waters from Rio de Janeiro (Brazil) to the San Matías Gulf (Argentina). This work focused on studying the seminal quality of tank-reared P. orbignyanus, demonstrating that males are fluent year-round, with the highest yields at the early reproductive season. Fresh sperm exhibited good forward swimming, and samples could be refrigerated up to 48 h while retaining their motility after activation. The optimal conditions for P. orbignyanus sperm motility activation were established as 950 mOsmol/Kg and pH values between 7 and 7.9. Additionally, a well-defined protocol for semen vitrification was developed to assess the cryotolerance of this species´ sperm. We successfully produced high-quality sperm samples, using two vitrification formulations containing trehalose and both z-1000 and x-1000 polymers, that can be used in a near-future in vitro embryo production program.

From Beer to Cheese: Characterization of Caseinolytic and Milk-Clotting Activities of Proteases Derived from Brewer’s Spent Grain (BSG) Villegas, Maximiliano Matías; Silva, Johana Nair; Tito, Florencia Rocio; Tonón, Claudia Virginia; Muñoz, Fernando Felipe; Pepe, Alfonso; Guevara, Maria Gabriela This study explores the extraction and characterization of proteolytic enzymes from brewer’s spent grain (BSG) and their potential as sustainable coagulants in the dairy industry. BSG samples from various beer types (Blonde Ale, IPA, Kölsch, Honey, and Porter) were obtained from two artisanal breweries in Mar del Plata, Argentina. Optimization of caseinolytic activity (CA) and protein extraction was conducted using a Plackett–Burman design, followed by a Box–Behnken design. Optimal protein concentration was achieved at intermediate pH and high temperature, while CApeaked at pH8.0. The specific caseinolytic activity (SCA) varied among the extracts, with BSG3 showing the highest activity (99.6 U mg−1) and BSG1 the lowest (60.4 U mg−1). Protease inhibitor assays suggested the presence of aspartic, serine, metallo, and cysteine proteases. BSG3 and BSG4 showed the highest hydrolysis rates for α-casein (70% and 78%). For κ-casein, BSG1, BSG2, and BSG3 demonstrated moderate activity (56.5%, 49%, and 55.8), while BSG4 and BSG5 exhibited the lowest activity. Additionally, the milk-clotting activity (MCA) of BSG extracts was comparable to plant-based coagulants like Cynara cardunculus and Ficus carica. These findings highlight the potential of BSG-derived proteases as alternative coagulants for cheese production, offering a sustainable link between the brewing and dairy industries.

El punitivismo: Sus dimensiones desde una perspectiva psicológica y su incidencia en Argentina; El punitivisme: Les seves dimensions des d'una perspectiva psicològica i la seva incidència a l'Argentina; Punitivism: Its dimensions from a psychological perspective and its impact in Argentina Roca, Marcelo Agustin; Espósito Santamaría, Ariana; Casella, Florencia; Duhalde, Nahuel Hugo Ezequiel El punitivismo en sus comienzos fue abordado desde una perspectiva político penal. En la misma se observa esta demanda punitiva por parte de los ciudadanos ante la tendencia de políticas más severas. En los últimos años, el punitivismo se ha enfocado en otras áreas de interés como los medios de comunicación, la sociología y la psicología. A pesar de tener una extensa literatura académica, este constructo presenta escasas investigaciones en el ámbito psicológico. Es por ello que el objetivo de este trabajo fue indagar la relación que posee la tendencia punitiva con las motivaciones al castigo desde una perspectiva psicológica. Para ello, el presente trabajo consta de una revisión literaria, para la cual se utilizó información de diferentes repertorios, buscando una mirada global del punitivismo; y luego una puntualización en el contexto argentino. En conclusión, se ha encontrado extensa literatura sobre el punitivismo especializado sobre sus orígenes, metodologías y la relación de factores sociodemográficos en la tendencia punitiva. Sin embargo, con respecto a la relación existente entre el punitivismo y variables psicológicas; experiencias de victimización, los medios de comunicación y la necesidad de cierre cognitivo, las investigaciones al respecto tienden a ser escasas. Futuras investigaciones podrían relacionar el fenómeno del punitivismo relacionado con los aspectos psicológicos, como emocional y cognitivo, generando un conocimiento novedoso al territorio argentino.; El punitivisme en els seus començaments va ser abordat des d'una perspectiva polític penal. En la mateixa s'observa aquesta demanda punitiva per part dels ciutadans davant la tendència de polítiques més severes. En els últims anys, el punitivisme s'ha enfocat en altres àrees d'interès com els mitjans de comunicació, la sociologia i la psicologia. Malgrat tenir una extensa literatura acadèmica, aquest constructe presenta escasses recerques en l'àmbit psicològic. És per això que l'objectiu d'aquest treball va ser indagar la relació que posseeix la tendència punitiva amb les motivacions al càstig des d'una perspectiva psicològica. Per a això, el present treball consta d'una revisió literària, per a la qual es va utilitzar informació de diferents repertoris, buscant una mirada global del punitivisme; i després una puntualització en el context argentí. En conclusió, s'ha trobat extensa literatura sobre el punitivisme especialitzat sobre els seus orígens, metodologies i la relació de factors sociodemogràfics en la tendència punitiva. No obstant això, respecte a la relació existent entre el punitivisme i variables psicològiques; experiències de victimització, els mitjans de comunicació i la necessitat de tancament cognitiu, les recerques sobre aquest tema tendeixen a ser escasses. Futures recerques podrien relacionar el fenomen del punitivisme amb els aspectes psicològics, com a emocional i cognitiu, generant un coneixement nou al territori argentí.; In its beginning, punitivism was approached from a political-criminal perspective. In this context, a punitive demand from citizens is observed in response to the trend of more severe policies. In recent years, punitivism has focused on other areas of interest such as the media, sociology, and psychology. Despite having extensive academic literature, this construct presents scarce research in the psychological field. Therefore, the objective of this work was to investigate the relationship between punitive tendencies and motivations for punishment from a psychological perspective. To this end, the present work consists of a literature review, for which information from different repertoires was used, seeking a global view of punitivism; and then a focus on the Argentine context. In conclusion, extensive literature has been found on punitivism specialized in its origins, methodologies, and the relationship of sociodemographic factors in punitive tendencies. However, regarding the relationship between punitivism and psychological variables; victimization experiences, the media, and the need for cognitive closure, research on this topic tends to be scarce. Future research could relate the phenomenon of punitivism to psychological aspects, such as emotional and cognitive, generating novel knowledge for the Argentine territory.

Novelties on field crickets (Orthoptera: Gryllidae) from Argentine Patagonia: First record of Gryllus (Gryllus) argentinus Saussure, 1874 and a new species of Miogryllus Saussure, 1877 Castelli, Lucas Emanuel; Cadena Castañeda, Oscar J.; Mariottini, Yanina; Cheli, German Horacio Orthoptera are insects that have been widely studied in Argentina and worldwide. However, some groups such as the suborder Ensifera, have received less attention, and their knowledge is scarce. This work reports the presence of the genus Miogryllus (Saussure) in the Chubut Province for the first time (this being the southernmost distribution of the genus), describes a new species for science, and expands the distribution of Gryllus (Gryllus) argentinus (Saussure) to this province. Although about a third of the material studied came from the biogeographic province of Patagonia, it is interesting that both Miogryllus patagonicus sp. nov. like G. (G.) argentinus were exclusively found in sites belonging to the Monte desert, to the east of Chubut Province. Furthermore, all sites where M. patagonicus sp. nov. was collected were characterized by the absence of sheep activity for at least 10 years or by the implementation of environmental remediation strategies. This work represents a valuable contribution to understanding the distribution pattern of the Gryllidae family in Argentine Patagonia and has the potential to enhance current conservation strategies for these fragile ecosystems, as these insects could be good indicators of environmental changes.

El viaje del argentino César Vásquez a los Estados Unidos del Brasil (1941): Entre internacionalizar y hacer una Educación Física nacional; The Journey of the Argentinian César Vásquez to the United States of Brazil (1941): Balancing Internationalism and National Physical Education Galak, Eduardo; Pereyra, Martín Alejandro; Kopelovich, Pablo La Dirección General de Educación Física fue una dependencia del Ministerio de Justicia e Instrucción Pública de la Nación que funcionó entre 1938 y 1947, una institución que pretendió marcar un antes y después en la disciplina en Argentina. Tuvo como único director a César Vásquez, una figura relevante de la historia de la Educación Física argentina. Se propone analizar el viaje que Vásquez realizó a Brasil en el año 1941, enmarcado en un panamericanismo que convivía con discursos nacionalistas. Se trató de un viaje que inauguró una serie de intercambios entre autoridades de la Educación Física de ambos países, lo cual permite ver la imagen que se propusieron proyectar a la Nación vecina. Se utilizan como fuentes los artículos periodísticos que siguieron minuciosamente el viaje y los boletines del mencionado Ministerio que enmarcan esos intercambios. Se concluye que la institucionalización de la Educación Física argentina mostró una fuerte vinculación con organismos nacionales e internacionales y que el viaje significó una apertura transnacional para conformar la disciplina en contraste con lo realizado en otros países, en el marco de un panamericanismo que permite cuestionar la exclusiva dominación europea. Además, se observa que lo que se “mostró” a Brasil, pese a que se presentó como lo acontecido en toda Argentina, daba cuenta de forma exclusiva de lo realizado en Capital Federal y sus alrededores, lo que exhibe que el discurso federalizador de la Dirección General estaba centrado en las grandes ciudades.; The General Directorate of Physical Education (“Dirección General de Educación Física”), a branch of the Ministry of Justice and Public Instruction of Argentina, operated from 1938 to 1947, marking a significant era in the discipline within the country. Its sole director, César Vásquez, stands as a prominent figure in the history of Argentine Physical Education. This article aims to analyze Vásquez's 1941 trip to Brazil, which was positioned within a Pan- American context that coexisted with nationalist narratives. This journey initiated a series of exchanges between the Physical Education authorities of both countries, revealing the image they intended to project to their neighbor. The sources utilized include detailed newspaper articles covering the trip and bulletins from the aforementioned Ministry, which contextualize these exchanges. The analysis concludes that the institutionalization of Argentine Physical Education exhibited a strong connection with both national and international organizations. Vásquez's trip marked a transnational opening, shaping the discipline in contrast to practices in other countries and challenging the exclusive European dominance within the framework of Pan-Americanism. Additionally, it is noted that the aspects showcased to Brazil, although presented as representative of all Argentina, predominantly highlighted developments in the Federal Capital and its surroundings. This underscores that the federalizing discourse of the General Directorate was primarily centered on the major cities.

Análisis de la movilidad eléctrica en el contexto del transporte sostenible en Argentina; Analysis of electric mobility in the context of sustainable transport in Argentina Chemes, Jorge; Molinari, Luis; Mansur, Sergio Luis La transición energética en América Latina está instalada en diversos ámbitos, y atender la movilidad resulta crucial ya que en la región es el sector que más energía demanda. Este trabajo tiene como objetivo analizar el rumbo de la planificación de la transición energética en el sector transporte en Argentina, teniendo en cuenta el Plan Nacional de Transporte Sostenible, los datos del mercado y fundamentalmente los lineamientos de acciones que determinarán el futuro del transporte de personas en nuestro territorio. Todo lo anterior enmarcado en la velocidad de respuesta que debe darse para encausar la baja de las emisiones de manera tal de cumplir con los objetivos comprometidos, pero también para brindar las herramientas necesarias a los actores de la economía de Argentina en términos de acceso a mercados internacionales exigentes con la reducción de emisiones en origen. Los resultados acusan que en un plazo de 10 a 15 años no estarían dadas las condiciones técnicas y económicas para sincronizar las agendas de la movilidad eléctrica y la descarbonización en Argentina con un desarrollo local.; Energy transition in Latin America is being discussed in several sectors. Addressing mobility is critical, being the largest energy consumer in the region. This paper examines the trajectory of energy transition planning in Argentina`s transportation sector, taking into account the National Plan for Sustainable Transportation, market data, and strategic guidelines that Will shape the future of passenger transportation in the country. This analysis considers the urgency of reducing emissions to meet established targets and to equip Argentina`s economic actors with the tools to access international markets that require emissions reductions. The findings suggest that over the next 10 to 15 years, Argentina may face challenges aligning its electric mobility and decarbonization efforts with local development due to insufficient technical and economic conditions.

Thermodynamics of irreversible processes approach applied to explain the functional responsiveness of lipid membranes Cejas, Jimena del Pilar; Rosa, Antonio Sebastián; González Paz, Agustín Nicolás; Frías, María de los Ángeles; Disalvo, Edgardo Anibal The lipid membrane interphase is treated as a binary solution composed of polar head groups, with their hydration shells sunk in water, different from the bulk. This type of water is exchangeable with adjacent media according to the lateral surface pressure and water activity. Thus, the water influxes and effluxes at constant temperature and in the absence of an electric field, driven by the changes in surface pressure (surface tension) and the osmotic gradient (water activity), are coupled through phenomenological coefficients reflecting water-lipid and lipid-water frictions that relate to the diffusion of water in lipids and diffusion of lipids in water as described by the thermodynamics of irreversible processes (TIP) approach. Thus, the experimental surface pressure/area per molecule isotherms for monolayers can be fitted satisfactorily in contrast to the classical gas model. Hydrogen bond arrangements between water and membrane components determine a unique surface tension of water (surface free energy profile). Each surface pressure/water activity pair defines a particular steady state of the interphase, which explains its responsive behavior when chased by physical and chemical perturbations.

Drones en arqueología: relevamiento fotogramétrico del Pucará de Tacuil en el valle Calchaquí medio, Salta, Argentina; Drones in archeology: phogrammetric survey of the Pucará de Tacuil in the medio Calchaquí valley, Salta, Argentina Lanzelotti, Sonia Laura; Peña Reinoso, Rafael; Williams, Veronica Isabel En este trabajo se presentan los resultados del relevamiento fotogramétrico completo efectuado sobre un sitio del Periodo de Desarrollos Regionales (ca. 1000- 1430 d. C), el Pucará de Tacuil, en la provincia de Salta, Argentina. La restitución fotogramétrica se realizó a partir de fotografías aéreas capturadas con dos drones, que cubrieron los tres sectores que conforman este sitio arqueológico. Los productos cartográficos obtenidos fueron un Modelo Digital de Elevación (MDE) y una ortofoto de alta resolución del área a partir de los cuales se detectaron, caracterizaron, registraron y midieron las estructuras arqueológicas del sitio. Se expone la problemática arqueológica que rodea al lugar con sus características de poblado pucará y se realiza un análisis sobre la organización socioespacial inferida a partir de las evidencias arqueológicas detectadas.; The the results of a complete photogrammetric survey carried out on a site from the Regional Development Period (ca. 1000-1430 AD), the Pucará de Tacuil, in the province of Salta, Argentina, are shown. The photogrammetric restitution was carried out from aerial photographs captured with two drones, which covered the three sectors that make up this archaeological site. The cartographic products obtained were a Digital Elevation Model and a high-resolution ortophoto of the area from which the archaeological structures of the site were detected, characterized, recorded and measured. The archaeological problems surrounding the site with its characteristics of a pucará settlement are presented and an analysis is made of the socio-spatial organization inferred from the archaeological evidence detected.