Comparative study of the dissolution of LCO in HCl medium with and without H2O2 Drajlin Gordón, Diego Sebastián; Suarez, Daniela Silvana; Toro, Norman; Gálvez, Edelmira D.; Pinna, Eliana Guadalupe; Rodriguez, Mario Humberto The dissolution of LiCoO2 (LCO) from spent lithium-ion batteries (LIBs) has been widely studied with organic and inorganic acids. Among these acids, HCl is the one that showed the best results when used at concentrations higher than 4 M. However, its higher cost compared with other acids is disadvantageous. Taking this into account, this work aims to perform a comparative study of the effect of different operational variables such as temperature, reaction time, leaching agent concentration (HCl) and reducing agent concentration (H2O2) on the dissolution efficiency of LCO for the systems HCl and HCl-H2O2 to determine the optimal parameters to achieve a maximum dissolution in minimum time at low temperatures and reagent concentrations. Increasing temperature, time and concentration of the reagents had a positive effect on the dissolution of LCO. When working with HCl 1.8 M, the highest dissolution for LCO, 91.0% was obtained at 348 K for 60 min. Furthermore, a slightly higher oxide dissolution (93.0%) was obtained in a reducing medium at the same temperature in half the time and with a concentration of HCl more than ten times lower. This will allow us to propose an alternative process to the existing ones with economic and ecological advantages.

Lectura colaborativa de tablas de frecuencias: Análisis secuencial del proceso sociocognitivo; Collaborative Reading of Frequency Tables: Sequential Analysis of the Socio-Cognitive Process Castellaro, Mariano Andrés; Roselli, Nestor Daniel El trabajo se inscribe en un programa general de investigación cuyo propósito es trasladar el estudio de la interacción entre pares al ámbito de la apropiación de diferentes sistemas externos de representación. En el presente artículo de investigación científica y tecnológica se analiza el proceso sociocognitivo involucrado en la comprensión colaborativa de una tabla cruzada de frecuencias (en díadas), desde una perspectiva secuencial. Se diferenciaron tres fases: posicionamiento inicial frente a la consigna, elaboración y toma de decisión final. Participaron 120 díadas (240 estudiantes) de 6° y 7° grado, de la ciudad de Rosario y cercanías (Argentina). Las diferenciaciones principales refirieron al momento de elaboración. En general, predominó el acuerdo sobre el conflicto, sin fundamentación; cuando se registraron modalidades fundamentadas, predominaron las unilaterales; en los casos de conflicto, prevaleció su resolución relacional. Estas tendencias se acentuaron o debilitaron según menor o mayor dificultad del ítem. La composición sociocognitiva también registró diferenciaciones significativas, en las fases de elaboración y resolución, oponiendo díadas simétricas avanzadas, respecto a las simétricas básicas y asimétricas. Los resultados condicen con los postulados de la teoría del conflicto sociocognitivo y se corroboran los niveles de comprensión reportados por la literatura.; The work is part of a general research program whose purpose is to transfer the study of interaction between peers to the field of appropriation of different external systems. of representation. Thus, in this scientific and technological research article, the socio-cognitive process involved in the collaborative understanding of a cross table of frequencies (in dyads) is analyzed from a sequential perspective. Three phases were differentiated: initial positioning against the slogan, elaboration and final decision making. 120 dyads (240 students) from 6th and 7th grade, from the city of Rosario and surroundings (Argentina) participated. The main differences referred to the time of preparation. In general, the agreement prevailed over the conflict, without justification; when substantiated modalities were recorded, unilateral ones predominated; in cases of conflict, its relational resolution prevailed. These tendencies were accentuated or weakened according to lesser or greater difficulty of the item. The socio-cognitive composition also registered significant differences in the elaboration and resolution phases, opposing advanced symmetrical dyads, with respect to the basic symmetrical and asymmetrical ones. The results agree with the postulates of the socio-cognitive conflict theory and the levels of comprehension reported by the literature are corroborated.

Marine deposits of the Chuy Formation (Late Pleistocene) and isostatic readjustments in the area of Laguna de Rocha (Uruguay); Depósitos marinos de la Formación Chuy (pleistoceno tardío) y reajustes isostáticos en el área de la Laguna de Rocha (Uruguay); Depósitos marinhos da Formação Chuy (Pleistoceno tardio) e reajustes isostáticos na área da Laguna de Rocha (Uruguai) Castiglioni, Eduardo; Gaucher, Claudio; Perillo, Gerardo Miguel E.; Sial, Alcides The Chuy Formation is characterized by up to 135 m of an alternation of green pelites and fine to coarse sandstones with sparse invertebrate fossils. The marine deposits are interbedded with continental, loessic deposits of the Libertad For-mation and overlain by the Dolores Formation, made up of mudstones with calcareous concretions.The results of the radiocarbon dating showed calibrated ages of 13.9±0.2, 41.5±1.9 and 50±3 ka BP on bioclasts of marine fossils at an elevation (above sea level, asl) of -2.8, -6.13 and -8 m respectively. Such ages and elevations are in disa-greement with the sea-level evolution inferred for the Late Pleistocene. Two possible explanations are: (a) the ages rep-resent minimum ages and deposition took place during the last interglacial at 115-130 ka (Marine Isotope Stage MIS 5e), or (b) they represent depositional ages but the area experimented large isostatic readjustments during and after the last glaciation. Several lines of evidence suggest a Late Pleistocene age for the upper Chuy Formation, including the 18O curve obtained from invertebrate shells, which shows large secular variations consistent with MIS 1 to 7.The proposed scenario envisages significant subsidence between 50-20 ka due to the far-field effects of glacial load in the Andes/Patagonia. At 20 ka the eustatic regression outpaced subsidence, leading to continentalization of the Laguna de Rocha area. Marine conditions returned at 15 ka and into the Holocene, except for continental deposits (Dolores For-mation) at ca. 11-10 ka (Younger Dryas). An uplift of 115 m took place between 15 and 9 ka in the area, which is interpreted as post-glacial rebound. In the Holocene, moderate subsidence was further recorded. A regional trend is observed, with uplift of marine deposits increasing towards the W-SW, which is consistent with an explanation as post-glacial isostatic rebound.; La Formación Chuy se caracteriza por hasta 135 m de una alternancia de pelitas verdes y areniscas finas a gruesas con fósiles de invertebrados marinos. Los depósitos marinos están intercalados con depósitos loéssicos continentales de la Formación Libertad y sobreyacidos por la Formación Dolores, con lodolitas con concreciones calcáreas. Los resultados de dataciones radiocarbónicas mostraron edades calibradas de 13900±200, 41500±1900 y 50000±3000 años AP, para bioclastos de fósiles marinos a una cota sobre el nivel medio del mar (NMM) de -2,8, -6,13 y -8 m, respec-tivamente. Estas edades y cotas están en desacuerdo con la evolución del nivel medio del mar aceptada para el Pleisto-ceno tardío. Dos posibles explicaciones son: (a) las edades representan edades mínimas y la depositación tuvo lugar durante el último interglacial (115-130 ka; MIS 5e), o (b) representan edades de depositación, pero el área experimentó grandes reajustes isostáticos durante y después de la última glaciación. Varias líneas de evidencia favorecen una edad Pleistoceno tardío para la Formación Chuy superior, incluyendo la curva de 18O obtenida para conchillas de invertebra-dos, que muestra grandes variaciones seculares consistentes con los estadios MIS 1 a MIS 7. El escenario propuesto prevé un hundimiento significativo entre 50-20 ka debido a los efectos lejanos de la carga glacial en los Andes/Patagonia. A los 20 ka, la regresión eustática superó al hundimiento, lo que llevó a la continentalización en el área de Laguna de Rocha. Las condiciones marinas regresaron a los 15 ka y durante el Holoceno, excepto por depósitos continentales (Formación Dolores) en 11-10 ka (Younger Dryas). Se produjo un levantamiento de unos 115 m entre 15 y 9 ka en la zona, lo que se interpreta como un rebote post-glacial. En el Holoceno, se registra nuevamente un hundimiento moderado. Se observa una tendencia regional, con un aumento de los depósitos marinos hacia el W-SW, lo que es consistente con un rebote isostático post-glacial.; A Formação Chuy é caracterizada por uma alternância de até 135 m de folhelhos verdes e arenitos finos a grossos com fósseis de invertebrados marinhos. Depósitos marinhos estão intercalados com depósitos loessicos continentais da For-mação Libertad é recobertos pela Formação Dolores, com lamitos com concreções calcárias Os resultados da datação por radiocarbono mostraram idades calibradas de 13.900±200, 41.500±1.900 e 50.000±3.000 anos AP, para bioclastos de fósseis marinhos em uma elevação acima do nível médio do mar de -2,8, -6,13 e -8 m, respectivamente. Essas idades e alturas estão em desacordo com a evolução do nível do mar aceita para o final do Pleistoceno. Duas explicações possíveis são: (a) as idades representam as idades mínimas e a depositação ocorreu durante o último período interglacial (115-130 ka; MIS 5e), ou (b) representam as idades de depositação, mas a área experimentou grandes reajustes isostáticos durante e após a última glaciação. Várias linhas de evidência favorecem uma idade do Pleistoceno tardio para a Formação Chuy superior, incluindo a curva do 18O obtida para conchas de inverte-brados, que mostra grandes variações seculares consistentes com estágios MIS 1 a MIS 7. O cenário proposto prevê uma subsidência significativa entre 50-20 ka devido aos efeitos distantes da carga glacial nos Andes/Patagônia. Aos 20 ka, a regressão eustática superou a subsidência, levando à continentalização na área da La-guna de Rocha. As condições marinhas retornaram em 15 ka e no Holoceno, exceto para depósitos continentais (Forma-ção Dolores) em 11-10 ka (Younger Dryas). Uma subida de 115 m foi inferida entre 14 e 9 ka na área, o que é interpretado como um elevação pós-glacial. No Holoceno, uma subsidência moderada foi registrada novamente. Observa-se uma tendência regional, com um aumento dos depósitos marinhos em direção ao W-SW, o que é consistente com uma expli-cação como um rebote isostático pós-glacial.

De relatos y memorias: un análisis antropológico situado de las identidades de mujeres indígenas en una ciudad intermedia; Of stories and memories: a situated anthropological analysis of the identities of indigenous women in an intermediate city; De histórias e memórias: uma análise antropológica situada das identidades de mulheres indígenas em uma cidade intermediária Lencina, Rocio; Mariano, Mercedes El presente trabajo se ha constituido en un esfuerzo por comprender ciertos aspectos relativos a la producción social de discursos identitarios contemporáneos de mujeres que se adscriben étnicamente como indígenas e inscribirlos en el marco de un proceso social más amplio. La especificidad del tema propuesto se inscribe en la heterogeneidad de sentidos que dichas mujeres reconocen al definirse como indígenas, lo que permite comenzar a delinear un campo de investigación en un área donde este tema solo fue vinculado con el pasado a través de estudios históricos y arqueológicos. En este sentido, si bien existen estudios a nivel nacional, en el partido de Olavarría no se han llevado a cabo investigaciones de manera sistemática ni desde la perspectiva de sus protagonistas. Por ello, se propone construir conocimiento nuevo y actualizado a partir de un enfoque etnográfico que permita analizar y comprender los diversos procesos de construcción identitaria en una ciudad de tipo intermedia.; The present work has been constituted in an effort to understand certain aspects related to the social production of contemporary identity discourses of women who are ethnically ascribed as indigenous and to inscribe them within the framework of a broader social process. The specificity of the proposed theme is inscribed in the heterogeneity of meanings that these women recognize when defining themselves as indigenous, which allows beginning to outline a field of research in an area where this theme was only linked to the past through historical and archaeological studies. In this sense, although there are studies at the national level, in the city of Olavarría they have not been carried out systematically or from the perspective of their protagonists. For this reason, it is proposed to build new and updated knowledge through an ethnographic approach that allows analyzing and understanding the various processes of identity construction in an intermediate-type city.; O presente trabalho constituiu-se em um esforço para compreender alguns aspectos relacionados à produção social dos discursos identitários contemporâneos de mulheres etnicamente classificadas como indígenas e inscrevê-los no quadro de um processo social mais amplo. A especificidade do tema proposto se inscreve na heterogeneidade de significados que essas mulheres reconhecem ao se definirem como indígenas, o que permite começar a delinear um campo de pesquisa em uma área onde esse tema só estava ligado ao passado por meio de estudos históricos e arqueológicos. Nesse sentido, embora existam estudos em nível nacional, no partido de Olavarría eles não foram realizados de forma sistemática ou na perspectiva de seus protagonistas. Por esta razão, propõe-se construir novos e atualizados conhecimentos através de uma abordagem etnográfica que permita analisar e compreender os vários processos de construção identitária numa cidade de tipo intermédio.

A systematic review about the contribution of the genus Tessaria (Asteraceae) to cancer study and treatment; Revisión sistemática sobre la contribución del género Tessaria (Asteraceae) al estudio y tratamiento del cáncer; Revisão sistemática sobre a contribuição do gênero Vernonia condensada Baker (Asteraceae) para o estudo e tratamento do câncer Sosa Lochedino, Arianna Lourdes; Hapon, María Belén; Gamarra Luques, Carlos Diego Belonging to the Asteraceae family, Tessaria (Ruiz & Pavon, 1753) is a genus of shrubs or small trees distributedin various habitats located from Argentina to the southwestern United States of America. The taxa arecomposed of five confirmed species, which have been previously reported for their ethnopharmacologicaluses as hypocholesterolemiant, hypoglycemic, antitussive, anti-inflammatory, anticancer, and abortifacientagent; it also has been used in hepatic, renal, pulmonary, and rheumatic diseases. Up to the present, T.absinthioides, T. ambigua, T. dodoneifolia, T. fastigiata and T. integrifolia have been chemically analyzed.While decoctions, infusions, methanolic, and hydromethanolic extracts are the most studied botanicalcompounds, its most recognized phytochemical constituents are caffeoylquinic acid, eupatorin, naringenin,protocatechuic, and quercetin. Scientifically, several biomedical properties such as virucidal, antibacterial,leishmanicidal, insecticidal, gastroprotective, antiasthmatic, hypoglycemic, and antiatherogenic wereattributed to the genus. Concerning oncologic research, the chemicals produced by Tessaria have antitumoractivities interfering with carcinogenesis, cell proliferation, metastasis, and angiogenesis. In addition, thenatural extracts obtained from Tessaria species have biological activities closely related to cancer, actingas antioxidants and anti-inflammatories. In particular, it has been reported that T. absinthioides resultedcytotoxic against several cancer cell lines and acts as an antitumoral compound in murine models. Due tothe aforementioned antecedents, the Tessaria species are considered undervalued within the oncologicalfield; the goal of the current systematic review is to summarize the information available on the genus,relevant for cancer research and treatment.; Perteneciente a la familia Asteraceae, Tessaria (Ruiz & Pavon, 1753) es un género de arbustos o árboles pequeños distribuidos en diversos hábitats ubicados desde Argentina hasta el suroeste de los Estados Unidos de América. El taxón está compuesto por cinco especies confirmadas, las cuales han sido previamente reportadas por sus usos etnofarmacológicos como hipocolesterolemiante, hipoglucemiante, antitusivo, antiinflamatorio, anticanceroso y abortivo; así como en enfermedades hepáticas, renales, pulmonares y reumáticas. Hasta el momento, se han analizado químicamente T. absinthioides, T. ambigua, T. dodoneifolia, T. fastigiata y T. integrifolia. Mientras que las decocciones, infusiones, extractos metanólicos e hidrometanólicos son los compuestos botánicos más estudiados; sus constituyentes fitoquímicos más reconocidos son el ácido cafeolquínico, eupatorina, naringenina, protocatechuic y quercetina. Científicamente, se atribuyeron al género varias propiedades biomédicas como virucida, antibacteriano, leishmanicida, insecticida, gastroprotector, antiasmático, hipoglucemiante y antiaterogénico. En relación con la investigación oncológica, las sustancias químicas producidas por Tessaria, tienen actividades antitumorales que interfieren con la carcinogénesis, la proliferación celular, la metástasis y la angiogénesis. Además, los extractos naturales obtenidos de estas especies tienen actividades biológicas estrechamente relacionadas con el cáncer y actúan como antioxidantes y antiinflamatorios. En particular, se ha informado que T. absinthioides resulta citotóxico contra varias líneas de células cancerosas y actúa como compuesto antitumoral en modelos murinos. Debido a los antecedentes mencionados, se considera la especie Tessaria como infravalorada dentro del campo oncológico. El objetivo de la presente revisión sistemática es resumir la información disponible del género, relevante para la investigación y el tratamiento del cáncer.; Pertencente à família Asteraceae, a Vernonia (Ruiz & Pavon, 1753) é um gênero de arbustos ou pequenas árvores distribuídas em vários habitats localizados da Argentina ao sudoeste dos Estados Unidos da América. O táxon é composto por cinco espécies confirmadas, que foram previamente relatadas para seus usos etnofarmacológicos como hipocolesterolemiante, hipoglicêmico, antitussivo, anti-inflamatório, anticâncer e abortivo; assim como em doenças hepáticas, renais, pulmonares e reumáticas. Até agora, foram analisados quimicamente T. absinthioides, T. ambigua, T. dodoneifolia, T. fastigiata e T. integrifolia. Por outro lado, as decocções, infusões, extratos metanólicos e hidrometanólicos são os compostos botânicos mais estudados; seus constituintes fitoquímicos mais reconhecidos são: ácido cafeoilquínico, eupatorina, naringenina, protocatecuico e quercetina. Cientificamente, várias propriedades biomédicas foram atribuídas ao gênero como viricida, antibacteriana, leishmanicida, inseticida, gastroprotetor, antiasmática, hipoglicêmica e antiaterógena. Com relação à pesquisa sobre câncer, os produtos químicos produzidos pela Venonia têm atividades antitumorais que interferem na carcinogênese, proliferação celular, metástase e angiogênese. Além disso, extratos naturais obtidos dessas espécies têm atividades biológicas intimamente relacionadas com o câncer e atuam como antioxidantes e anti-inflamatórios. Em particular, t. absinthioides tem sido relatado como citotóxico contra várias linhas de células cancerosas e age como um composto antitumoral em modelos murinos. Devido ao passado supracitado, a espécie Vernonia é considerada desvalorizada dentro do campo oncológico. O objetivo desta revisão sistemática é resumir as informações do gênero disponíveis relevantes para a pesquisa e o tratamento do câncer.

Aproximación cuantitativa a la discriminación contra gays y lesbianas; Quantitative approach to discrimination against gays and lesbians Ortega, Julian En este artículo se exponen parte de los hallazgos de la investigación doctoral del autor, cuyo objetivo principal consistió en describir y analizar los procesos de discriminación, violencia y desigualdad contra trabajadores y trabajadoras gays y lesbianas en el sector de la salud del Área Metropolitana de Buenos Aires. La investigación adoptó un enfoque metodológico mixto. Se desarrollan parte de los hallazgos cuantitativos, más específicamente los resultados de la Escala de Discriminación Percibida y Escala de Victimización Percibida, para someterlos a discusión con otras investigaciones previas en las cuales fueron administradas. Se concluye que los hechos de discriminación y desigualdad hacia gays y lesbianas aún persisten en los espacios de trabajo de la salud, mientras que las manifestaciones más explicitas de violencia se habrían desplazado hacia la población travesti/trans.; This article derives from the author´s doctoral research, which analysed situations of discrimination, violence and inequality against gay and lesbian workers due to their sexual orientation, gender or gender expression in healthcare institutions located in the Metropolitan Area of Buenos Aires. The study was carried out using a mixed approach. Part of the analysis from quantitave methods is described, with emphasis on the results of the Perceived Discrimination Scale and the Perceived Victimization Scale in order to relate these data to previous findings from different research. It is possible to conclude that acts of discrimination and inequality toward gays and lesbians are still common within healthcare workplaces, but more explicit manifestations of violence might have displaced to the transgender community.

Formative Research to Design SMS Messages to Increase Breast Cancer Screening Uptake in Argentina Sánchez Antelo, Victoria Inés María; Paolino, Melisa Delia; Frejdkes, Paula; Correa, Silvina; Furia, Anabel; Lopez de Degani, Graciela; Arrossi, Silvina There is a need for interventions to promote breast cancer screening among high-risk population. This formative research is part of a pragmatic randomized trial being conducted in Santa Fe, Argentina, in which we are evaluating whether SMS messages sent to women aged 50-69 increases breast cancer screening uptake. Here, we describe the formative results used to design the content of the SMS messages to be tested in the trial. We conducted four on-line focus groups with women aged 50+ (n = 14). Participatory techniques were used to debate the advantages and disadvantages of different options for the five structural elements -i.e., greeting, recipient, sender, message’s topic, and closing line-of the SMS message. We openly coded the discussions for agreements and preferences regarding the SMS message content. SMS messages as reminders to increase breast cancer screening were highly accepted. Women argued that the greeting line should provide clear information about the topic of the SMS message (eg, Health information). SMS messages should also include the woman’s name, because this inclusion would be an indicator that it was a personal SMS message. Most women considered that the sender of the SMS messages should be a health institution as this would legitimize the content. Regarding the topic of the message, women preferred an imperative tone and they mentioned that the SMS message should include information about how to get a mammogram (eg, “Women aged 50-69 should have a mammogram done every two years. Do you have an appointment? WhatsApp to …”). The closing line should encourage women to get a mammogram (eg, “Ask for your appointment now! It is important!”). Our findings have some implications for the design of mHealth interventions targeted at improving breast cancer screening. A personalized SMS could be a good way of inviting women, although its content must be carefully designed to provide clear information about how to get a mammogram.

Presencias de lo digital en la narrativa chilena reciente: Matías Celedón, Cynthia Rimsky, Mike Wilson; Presences of the digital in the recent Chilean narrative: Matías Celedón, Cynthia Rimsky, Mike Wilson Walker Sanchez, Carlos El objetivo de este artículo es analizar cómo las herramientas digitales inciden en los procedimientos de escritura utilizados por tres novelas chilenas recientes: La filial (2012) de Matías Celedón, Leñador o ruinas continentales (2013) de Mike Wilson, La revolución a dedo (2020) de Cynthia Rimsky. Se trata de examinar cómo la puesta en primer plano del procedimiento determina una marcada orientación de estas escrituras hacia, por un lado, ciertas modalidades tradicionales de recuperación de estrategias de las vanguardias históricas, y por otro lado, cómo esa misma exhibición del procedimiento implica una fuerte marca de los problemas que enfrenta la escritura en la actualidad, en particular, en lo referido a una presión ejercida por lo digital. En este marco, se presentan reflexiones sobre los modos contemporáneos de narrar y los verosímiles literarios que se hacen posible en esta coyuntura.; The aim of this article is to analyze how digital tools impact the writing procedures used by three recent Chilean novels: La filial (2012) by Matías Celedón, Leñador o ruinas continentales (2013) by Mike Wilson, La revolución a dedo (2020) by Cynthia Rimsky. It is a question of examining how the foregrounding of the procedure determines a marked orientation of these writings towards, on the one hand, certain traditional modalities of recovering some strategies of the historical avant-gardes, and on the other hand, how that same exhibition of the procedure implies a strong mark of the problems that writing faces today, in particular, with regard to a pressure exerted by the digital world. Within this framework, we will proposes reflections on contemporary modes of narration and the literary verisimilitudes that are made possible at this context.

El arte rupestre de Cueva Huenul 1 (Neuquén, Argentina): un lugar persistente del noroeste de Patagonia; Rock art of Cueva Huenul 1 site (Neuquén, Argentina): a persistent place in northwestern Patagonia Romero Villanueva Badin, Guadalupe Se presentan los primeros resultados del análisis arqueológico del arte rupestre de Cueva Huenul 1 (CH1) (Neuquén, Patagonia, Argentina). El sitio posee una robusta secuencia cronoestratigráfic a que enmarca sus ocupaciones humanas entre los 12.000 y 300 años calibrados AP. Sus motivos se caracterizan a partir de diversas variables y se retoma información arqueométrica disponible sobre estas imágenes, destacando el novedoso aporte del fechado absoluto por AMS de algunas de ellas. Además, se postula una secuencia de producción de los motivos que es articulada con diversos indicadores para asignar una cronología a los momentos de ejecución definidos. Estos resultados son evaluados junto con otras evidencias registradas en el sitio que proveen información independiente pero complementaria sobre su historia de uso. Esta integración indica que la comunicación visual de información, materializada en el arte rupestre, desempeñó un rol fundamental ,aunque versátil, en la historia ocupacional del sitio y la región.Si bien CH1 fue ocupado en forma poco intensa y discontinua durante el Holoceno, su arte rupestre constituyó un factor marcatorio clave en la construcción humana del sitio y su entorno como ´lugar persistente´ dentro de la geografía social de los grupos del noroeste de Patagonia en el pasado.; This paper presents the initial results of the archaeological analysis of rock art from Huenul Cave 1 (CH1) (Neuquén, Patagonia, Argentina). The site’s robust chronostratigraphic sequence frames human occupations between 12,000-300 calibrated years BP. The paper classifies rock art motifs on the basis of several variables and the available archaeometric data, including recently obtained radiocarbon dating by AMS of some images. It also proposes a production sequence for the motifs by connecting temporal data from other proxies to assign a chronology to the different moments of rock art production. These results are assessed in conjunction with other evidence found at CH1, which provides independent but complementary data regarding the history of its use. This integration indicates that visual communication of information, which took the form of rock art, played a fundamental –yet versatile– role in the occupational history of the site and the region. While the occupation of CH1 was neither intense nor continuous during the Holocene, rock art was a key placemaking device that shaped CH1 as a “persistent place” in the social geography of human groups in northern Patagonia.

La otra cara de la transformación vitivinícola: los pequeños productores mendocinos; The other side of wine processing: small producers in Mendoza Cerdá, Juan Manuel El sector vitivinícola de la provincia de Mendoza estuvo asociado históricamente al trabajo de los inmigrantes europeos que llegaron a la región a finales del siglo XIX y comienzos del XX y que accedieron a pequeñas parcelas de tierra donde comenzaron a cultivar la vid. Esta asociación de la pequeña propiedad con el cultivo de la vid se ha visto reforzada aún más en comparación a las grandes extensiones de tierras de la pampa húmeda, lo que ha dado un sentido de identidad particular. Sin embargo, en las últimas décadas, esto a comenzado a cambiar a partir del proceso de reconversión vitivinícola, que tuvo como una de sus características la concentración de la tierra y la pérdida de los pequeños productores. Sin embargo, este segmento sigue siendo una parte central de la vitivinicultura mendocina. Este artículo analiza en detalle este proceso, los impactos sobre la configuración del espacio y las políticas públicas que han contribuido al sostenimiento de los pequeños viñateros en un contexto de fuertes transformaciones en el sector.; The wine sector of the province of Mendoza was historically associated with the work of European immigrants who arrived in the region in the late nineteenth and early twentieth centuries and who accessed small plots of land where they began to cultivate the vine. This association of small property with vine cultivation has been further forced compared to the large tracts of land in the humid pampas, which has given a particular sense of identity. However, in recent decades, this has begun to change from the process of wine conversion that had a sone of its characteristics the concentration of land and the loss of small producers. However, this segment remains a central part ofMendoza viticulture. This article analyzes in detail this process, the impacts on the configuration of space and the public policies that have contributed to the sustenance of small winemakers in a context of strong transformations in the sector.

Geografías transfeministas en espacios educativos: diálogos sobre la problemática de la explotación sexual Garcia, Leticia; Moreno, Magdalena En este escrito presentamos un diálogo acerca de la explotación sexual, abordada como problemática geográfica y como contenido de las currículas en espacios educativos. En un comienzo planteamos nuestra postura política con respecto a los debates que se desarrollan dentro del campo del feminismo y reconocemos la diversidad de nuestros recorridos…

Low-dose prestorage 24-epibrassinolide spray enhances postharvest chilling tolerance in zucchini squash (Cucurbita pepo L.) by eliciting peroxidase and phenolic antioxidants Massolo, Juan Facundo; Sánchez, Ramiro Julián; Zaro, Maria Jose; Concellón, Analía; Vicente, Ariel Roberto Brassinosteroids are polyhydroxy steroid hormones, tested to induce cold acclimation in whole plants and some harvested fruits. So far, no works have determined whether such strategy may improve the chilling tolerance of immaturely harvested Cucurbits, which are, among the most sensitive vegetables. Herein, we evaluated the efficacy of 24-epibrassinolide to reduce chilling injury in zucchini squash (Cucurbita pepo L.). Prestorage sprays at a dose 10–100 times lower than reported for postharvest use in other fruits (0.1 μM), markedly reduced chilling injury incidence (ca. 70%) and severity (30%–40%), decreased weight loss, and delayed yellowing. After long-term storage, epibrassinolide-sprayed zucchini maintained lower electrolyte leakage and lipid peroxidation. The treatment also increased fruit antioxidant defenses by inducing peroxidase and increasing antioxidant capacity, phenolic compounds, and peroxidase activity. This is the first report showing that low-dose prestorage 24-epibrassinolide priming enhances the cold tolerance of immaturely harvested Cucurbits, preventing postharvest chilling injury. Novelty impact statement: This is the first study showing that brassinosteroid prestorage single spray at very low dose (0.1 μM) is sufficient to enhance the chilling tolerance of immaturely harvested Cucurbit vegetables. Epibrassinolide priming may be a feasible strategy to reduce chilling damage in highly sensitive zucchini squash.

Multi-method sensory approach to describe the effect of microwave-assisted extraction and addition of stems on the mouthfeel sensations of Bonarda wines from Mendoza (Argentina) Alvarez Gaona, Izmari Jasel; Fanzone, Martín Leandro; Sari, Santiago Eduardo; Catania, Anibal Alejandro; Coronado, Ignacio León; Jofré, Viviana; Zamora, María Clara; Galmarini, Mara Virginia The Bonarda variety has been used as a base for common red wines due to its contribution to color and low level of astringency as a consequence of its relative low tannin concentration. The use of MicrowaveAssisted Extraction (MWE) accelerates the maceration process, improving the diffusion of grape compounds into the must, while the stems addition during maceration/fermentation constitutes a sustainable technological alternative for increasing tannins at no additional cost. The present experimental design consisted of ten treatments (in triplicate), obtained combining both technologies. Two maceration strategies were applied: Control must (C) which was not treated, and must treated with microwavedassisted extraction after grape crushing. These were combined with five Stem-contact conditions (ST): C without ST, 50% ST addition, addition of 50% ST previously treated with MWE, 100% ST addition, and addition of 100% ST previously treated with MWE. The effect of the winemaking technologies on wine mouthfeel sensations was evaluated by different (static and dynamic) sensory methods: Sorting Task; Check-All-That-Applies (CATA) with different textiles as trans-modal references; and Temporal Dominance of Sensations (TDS). CATA evaluation revealed that threof the wine samples differed in their description. These were then dynamically described showing subtle differences in their TDS curves. The sequentiality of dominant sensations showed that the MWE treatment of the grapes and the combination ST with MWE did not modify dramatically mouthfeel sensations in Bonarda wines.

La defensa como herramienta de acople: El caso de Argentina frente a Estados Unidos (2015-2019); Defense as a Bandwagoning Tool: The Case of Argentina Against the United States (2015-2019) Magnani, Ezequiel Los estudios sobre la defensa nacional en Argentina hasta el momento no han incluido en su agenda los aportes de la “escuela de la autonomía”. Considerando que dicha tradición plantea distintas formas que tienen los Estados de vincularse con Estados Unidos (acople/resistencia) y que la defensa es un ámbito gubernamental que incide en dicha vinculación, el presente artículo tiene un doble objetivo: dar cuenta teóricamente de la forma en la que la política de defensa puede contribuir a una estrategia de acople hacia Estados Unidos, e ilustrar empíricamente dicha relación teórica, a partir del análisis de la política de defensa argentina. Se utiliza una metodología cualitativa, tomando como estudio de caso la política de defensa que llevó adelante Argentina durante el período 2015-2019. Se toma como referencia empírica a tres áreas propias de la defensa nacional: la definición de amenazas, la defensa como herramienta de posicionamiento internacional y la forma en que se realiza la adquisición de capacidades militares. Se concluye que el estudio de la política de defensa argentina (2015-2019) permite afirmar que la defensa nacional puede ser utilizada como una herramienta de acople hacia los Estados Unidos.; Studies on national defense in Argentina have not addressed the contributions of the “escuela de la autonomía”. Considering that this theoretical tradition proposes different ways in which States can enable links with the United States (bandwagon/resistance) and that defense policy is a governmental area that affects that relationship, the article has a double objective: to inquire theoretically about the way in which defense policy can contribute to a bandwagon strategy towards the Unites States and to illustrate empirically this theoretical relationship from the analysis of the Argentine defense policy. A qualitative methodology is used, taking as a case study the defense policy carried out by Argentina during the period 2015-2019 and taking three areas of national defense as an empirical reference: the definition of threats, defense as an international positioning tool, and the way in which military capabilities are acquired. It is concluded that the study of the Argentine defense policy (2015-2019) indicates that national defense can be used as a bandwagoning tool towards the United States.

Sobre el mimo en Bizancio: Pródromos y su Amaranto (H 146); About the Byzantine mime: Prodromus and his Amarantus (H 146) Cavallero, Pablo Adrian Se presenta la versión española con notas y estudio del texto 146 Hörandner de Pródromos(s. xii) sobre la edición de Migliorini (2010), con algunas pequeñas modificaciones, y se postula que se trata de un mimo literario, representado efectivamente en una tertulia, un θέατρον bizantino.; It is presented here a Spanish version of the Prodromus' text 146 Hörandner (xiith century), with footnotes and a study, on the basis of the Migliorini's edition (2010) with some little modifications. It is postulated that this text is a literary mime, which performance was made in a social gathering, a Byzantine θέατρον.

Sistemas de Información Geográfica en América Latina (1987-2021): Análisis de su evolución académica basado en las CONFIBSIG Buzai, Gustavo Daniel; Robinson, David J. El presente trabajo es la actualización del artículo de Buzai y Robinson (2010). Centrando el análisis en el contenido de las Conferencias Iberoamericana de Sistemas de Información Geográfica (CONFIBSIG) se realiza un análisis de la evolución temática en la región. Para ello contempla el inicio en 1987 en la Universidad Nacional (Costa Rica) y recorre los 17 eventos realizados, con los cuales se llega a los 35 años de desarrollo. Se realiza un análisis por décadas con síntesis en un gráfico de modelización temporal a partir del cual, la diferencia en la pendiente encontrada entre los países centrales y los países de América Latina produce una impronta particular respecto de la adopción de la tecnología tanto en actividades de docencia como de investigación aplicada. Esta actualización surge como nueva base para avanzar en perspectivas futuras.; This paper is an update of the article by Buzai and Robinson (2010). Focusing the analysis on the content of the Ibero-American Conferences on Geographic Information Systems (CONFIBSIG), an analysis is made of the thematic evolution in the region. For this purpose, it considers the beginning in 1987 at the National University (Costa Rica) and goes through the 17 events held, with which 35 years of development have been reached. An analysis is made by decades with a synthesis in a time modeling graph from which the difference in the slope found between the central countries and the countries of Latin America produces a particular imprint regarding the adoption of technology in both teaching and applied research activities. This update emerges as a new basis for advancing in future perspectives.

Copy Number Variation (CNV): A New Genomic Insight in Horses Nora Laseca; Antonio Molina; Mercedes Valera; Alicia Antonini; Demyda Peyrás, Sebastián This study aimed to contribute to our knowledge of CNVs, a type of genomic marker in equines, by producing, for the first time, a fine-scale characterization of the CNV regions (CNVRs) in the Pura Raza Española horse breed. We found not only the existence of a unique pattern of genomic regions enriched in CNVs in the PRE in comparison with the data available from other breeds but also the incidence of CNVs across the entire genome. Since these regions could affect the structure and dose of the genes involved, we also performed a gene ontology analysis which revealed that most of the genes overlapping in CNVRs were related to the olfactory pathways and immune response.

El sujeto-objeto de la filosofìa es inherentemente sexuado Binetti, María José En lo que sigue intentaremos mostrar por qué para nosotras el sujeto y objeto de la filosofía ha sido y es inherentemente sexuado. Esto supone varias ideas, tantas cuantas expresiones sexuales contenga la existencia. Entre ellas, supone la sexualidad como impulso creador del pensamiento, fuerza de diferenciación y unidad, de concepción y nacimiento de lo real. Quizás debamos mencionar al respecto que el propio nombre filo-sofía supone la síntesis originaria del pensamiento con cierta energía vital inmanente, esa misma que los antiguos llamaron Eros y entendieron como algo divino. Apoyaremos la idea del sujeto-objeto sexuado de la filosofía en el pensamiento feminista y, en concreto, en el feminismo de la diferencia sexual, el cual ha dado un giro decisivo en la concepción de la ontología.

La democratización como eje de la Intervención profesional del trabajo social; Democratization as the Main Concept of the Professional Intervention of Social Work Berná Vaccarino, Federico Antonio El trabajo que aquí se presenta, es una investigación cualitativa realizada en el marco de una tesis de grado en el año 2014. A través de entrevistas y grupo focal, se indagó sobre la relación entre trabajo social y democracia. De esta forma, se arribó a la conclusión de que es posible que nuestra disciplina haga sus aportes a la construcción de sociedades más democráticas, si al momento de la intervención profesional aplica pequeños procesos democratizadores en los distintos espacios y relaciones sociales. Poder, conflicto, construcción y deconstrucción, participación, derechos y ciudadanía, son algunos de los muchos conceptos que entran en discusión a lo largo de cuatro capítulos: intervención, instituciones, democracia y perspectiva democratizadora para el ejercicio disciplinar.; The following paper is qualitative research carried out within the framework of a graduate thesis in 2014. The relationship between social work and democracy was researched through interviews and a focus group. In this way, the conclusion reached was that it is possible that our discipline contributes to building more democratic societies if, at the time of professional intervention, small democratizing processes in the different spaces and social relations are applied. Power, conflict, construction and deconstruction, participation, rights and citizenship, are some of the many concepts that come into discussion throughout four chapters: intervention, institutions, democracy and a democratizing perspective for disciplinary exercise.

Rousseau’s General Will as a Bound for Strategic Self-Interested Voting; La voluntad general de Rousseau como un límite al voto estratégico autointeresado Bodanza, Gustavo Adrian; Linares, Sebastián Condorcet’s voting method, as its extension known as the Kemeny-Young rule, is often seen as the incarnation of Rousseau’s general will. But the Kemeny-Young rule has problems when cycles in the social ranking arise. In particular, it can lead to choose a “covered” alternative, i.e. one for which there are candidates with better performances in pairwise comparisons. On the other hand, the uncovered set, the set of all the alternatives that are not covered, puts limits to insincere votes of sophisticated voters under certain conditions. Basically, voting insincerelly for a non-preferred alternative in order to favor the actually preferred candidate would lead to the choice of an uncovered alternative. We argue that Rousseau’s general will could be embodied in a different kind of rule than Kemeny-Young’s, with both epistemic credentials and whose outcomes are within the uncovered set altogether. In this work we begin to explore that possibility.