Characterization of the seasonal variation of soil moisture in Argentina Fernández Long, María Elena; Peretti, Mercedes; Carnelos, Danilo Alejandro; Della Chiesa, Tomás; Spescha, Liliana Beatriz Soil moisture is an essential variable for both the agricultural production and the functioning of natural ecosystems, as well as one of the main variables regulating the climate system. Like precipitation, soil moisture has a marked annual cycle that depends mainly on the behaviour of precipitation and evapotranspiration. In this study, we developed a methodology that allows describing and characterizing the annual cycle of soil moisture in Argentina. For this purpose, we estimated soil moisture at 121 sites of Argentina by means of a simple hydrological balance (the BHOA, an acronym for its name in Spanish: “Balance Hidrológico Operativo para el Agro”) and analysed its intra-annual variability by means of different indices. This methodology allowed recognizing five different annual behaviours, with a consistent geographical pattern throughout Argentina. The characterization was based mainly on the time of occurrence of the annual maximum and minimum values of soil moisture, and secondly by the annual soil moisture content and seasonality. The northwest and part of the centre of Argentina present the minimum soil moisture values in spring and the maximum ones in autumn, while the east and south present the minimum values in summer and the maximum ones in winter. In general, sites with higher soil water content were found to have lower seasonality and vice-versa.

Detección de cambios (2004 - 2018) en la asignatura Sensores Remotos, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata Zucchino, Betina; Derguy, María Rosa; Lamaro, Anabel Alejandra; Morales, Natalia Soledad; Drozd, Andrea Alejandra; Torrusio, Sandra Edith La asignatura Sensores Remotos es una materia de régimen anual, presencial, con unacarga horaria de 120 horas, que incorpora contenidos de Teledetección Espacial ySistemas de Información Geográfica (SIG). Desde 1983 se dicta en la Facultad deCiencias Naturales y Museo (FCNyM) de la Universidad Nacional de La Plata (UNLP),actualmente como materia optativa para las carreras de Biología, Geología yAntropología, y en la última década también como materia de postgrado. En el contextoglobal de los últimos 15 años se han dado fenómenos tales como la masificación deinternet, la disponibilidad y democratización de datos e información geoespacial, eldesarrollo de software libres y propietarios y de herramientas para la distribución dedatos de manera casi ubicua en la actualidad. Este contexto ha contribuido a unatransformación continua en el enfoque con que se dicta la asignatura y en el alumnadoque la cursa. El objetivo del presente trabajo es describir los cambios en la composiciónde cursantes, uso de datos, de herramientas de software y recursos didácticos a lo largodel período analizado. Para esto se utilizó como información de base los listados decursantes, que contenían los datos de carrera y modalidad de cursada (grado oposgrado); y el relevamiento de la evolución de herramientas de análisis aplicadas.Entre los cambios orientados por la cátedra durante el período de análisis se destaca laimplementación de software libre. La diversificación de alumnos de las distintascarreras y la complejización de las herramientas de análisis aplicadas refleja lamasificación de estas tecnologías.; The subject Remote Sensing is an annual course, face-to-face, with a load of 120 hours, which incorporates contents of Remote Sensing and Geographic Information Systems (GIS). It is taught at the School of Natural Sciences and Museum (FCNyM) since the '80s, currently as an optional subject for careers in Biology, Geology and Anthropology, and in the last decade as a postgraduate subject at the National University of La Plata. In the last 15 years the internet widespread, the availability and democratization of geospatial data and information, the development of free and proprietary software, and tools for the distribution of data has occurred in an almost ubiquitous manner nowadays. This context has contributed to a continuous transformation in the approach with which the subject is taught and in the students who study it. Our goal is to describe the changes in the composition of students, use of data, software tools and teaching resources throughout the period analyzed. Among the changes driven by the subject during the analysis period, highlights the implementation of free software. The diversification of students from the different careers and the complexity of the applied analysis tools reflect the widespread of these technologies.

Enfoques para la enseñanza de la Biología: una mirada para los contenidos; Approaches to teaching Biology: a look at the contents Bermudez, Gonzalo Miguel Angel; Occelli, Maricel En el marco de un diseño didáctico multirreferencial y contextualizado a necesidades específicas, tomar decisiones sobre los contenidos exige poner en juego conocimientos específicos de la didáctica de las ciencias. Tras relevar el uso del término enfoque en la bibliografía de didáctica de las ciencias experimentales y formación del profesorado, reconocemos como enfoques establecidos a CTSA, la interdisciplinariedad y la historia de las ciencias. Sin embargo, al conceptualizar nuestra postura acerca del concepto de enfoque, asociado a las decisiones que tomamos las y los docentes sobre los contenidos, realizamos un análisis epistemológico y didáctico de la Biología y de propuestas de enseñanza de esta disciplina. Con base en ello proponemos y describimos ocho enfoques más para la enseñanza de contenidos biológicos, que diversifican los tres enfoques anteriores: morfo-funcional, taxonómico-clasificatorio, evolutivo, sistémico y ecológico, educación ambiental y educación para el desarrollo sostenible, diversidad cultural, educación en salud y educación sexual integral.; Within the framework of a multi-referential didactic design and contextualized to specific needs, making decisions about the contents requires putting into play specific knowledge of science teaching. After reviewing the use of the term approach in the literature of didactics of experimental sciences and teacher training, we recognized as established approaches STSE, interdisciplinarity and the history of science. However, when conceptualizing our position on the concept of approach, associated with the decisions that teachers make about contents, we carried out an epistemological and didactic analysis of Biology and of teaching proposals of this discipline. Based on that, we propose and describe eight approaches more to teach biological contents, which diversify the three previous ones: morpho-functional, taxonomic-classificatory, evolutionary, systemic and ecological, environmental education and education for sustainable development, cultural diversity, health education, and comprehensive sexual education.

Vino, actores y tramas: espacios de concertación de políticas en la vitivinicultura argentina; Wine, Stakeholders and Frameworks: Negotiation Forums in Argentinean Viticulture and Winemaking Hernández, Juan Jesús; Moscheni Bustos, Margarita del Carmen El objetivo general de este artículo es caracterizar la trama institucional de la vitivinicultura argentina, a partir de la descripción de las organizaciones intervinientes (su representatividad y sus relaciones de poder) y del análisis de los espacios de concertación existentes, en cuanto a los actores participantes y excluidos, los temas tratados y los conflictos y consensos principales en cada uno de ellos. La metodología es cualitativa. Las fuentes utilizadas son la bibliografía especializada y 20 entrevistas a líderes de las organizaciones del sector vitivinícola y a funcionarios.Se pretende contribuir a la bibliografía sobre la institucionalidad de la vitivinicultura argentina mediante una descripción de los espacios de concertación actuales liderados por el Estado o por actores del sector privado. Este análisis da cuenta de la reproducción de las asimetrías y conflictos en el mercado vitivinícola en el orden institucional y político.

Processing of Zn-Substituted calcium silicate layers on Y-Tzp bioceramics by dip coating Bruni, Yesica Lorena; Puleston, Thomas P.; Albano, Maria Patricia Ceramic layers based on calcium silicate non-substituted and substituted by Zn with different thickness, were developed by immersing porous Y-TZP disks into SiO2–CaO–ZnO–P2O5 glass suspensions with ZnO contents in the range of 0–20 mol%. The effect of the disk surface porosity and the slip solid loading on the formation of the dip coated layer was investigated. Special emphasis was given to the ZnO content of the dip coating slurries and its influence on the thickness and composition of the sintered layer. The greater chemical stability of the 20 mol % ZnO-substituted glass powder during aqueous colloidal processing resulted in slips with low viscosity values; whereas the high dissolution rate of the glass having 10 mol% ZnO significantly increased the slip viscosity. The liquid entrainment mechanism at the initial stage was accelerated either by using 10 mol% ZnO-substituted glass slips or by increasing the slip solid loading. The casting rate for longer immersion times markedly increased by increasing the surface porosity of Y-TZP disks. Sintered layers with thickness ~30–70% lower were produced using the glass dip coating slip with 20 mol% ZnO in comparison to 10 mol% ZnO. The main crystalline phase of the coated sintered layers was Ca3Si3O9, Ca2ZnSi2O7 and ZnSiO4 for the glasses with 0, 10 and 20 mol% ZnO, respectively.

Estudiar y trabajar en Argentina: Un análisis de la situación laboral de jóvenes estudiantes de Nivel Superior universitario en el período 2008-2017; Study and work in Argentina: An analysis of the employment status of young student higher education in 2008-2017; Estudar e trabalhar na Argentina: Uma análise da situação de trabalho de jovens estudantes do nível superior-universitário no período 2008-2017 Busso, Mariana Este artículo se propone aportar a la comprensión de la realidad socioocupacional de los y las jóvenes que acceden a estudios superiores en la Argentina. Para ello se analizará la heterogeneidad de sus situaciones laborales a partir de un análisis diacrónico (2008 y 2017) y cuantitativo (procesamiento estadístico de microdatos, EPH- INDEC). Estas serán abordadas desde el análisis de la condición de actividad, y de la “calidad” de las ocupaciones a las que acceden. Aunque la mayoría de quienes asisten a una institución de educación superior se encuentra en la inactividad, alrededor de un tercio logra trabajar y estudiar simultáneamente, y la mayoría lo hace bajo relación asalariada no registrada, presentando marcadas diferencias según género y estrato socioeconómico. En el período 2008-2017 observamos la generación de escenarios laborales cada vez más distantes entre jóvenes estudiantes provenientes de diferentes estratos sociales.; This article aims to contribute to the understanding of the socio-occupational reality of young people who access higher education in Argentina. In order to do is, we will analyze the heterogeneity of their employment situations based on a diachronic (2008 and 2017) and quantitative analysis (statistical processing of microdata bases, EPH-INDEC). They will be addressed from the analysis of the labour force participation, and the “quality” of occupations.Although the majority of higher-level students are inactive, around a third manage to work and study simultaneously, and the majority do so under an unregistered employment, with marked differences to gender and socioeconomic status. In the 2008-2017 period, we observed the generation of increasingly different job scenarios among young students from different social classes; Este artigo tem como objetivo contribuir para a compreensão da realidade sócio-ocupacional de jovens que ingressam no ensino superior na Argentina. Para isso, a heterogeneidade das situações de trabalho será investigada com base em análises diacrônicas (2008 e 2017) e quantitativas (processamento estatístico de bases de microdados, EPH-INDEC). Elas serão atingidas a partir da análise da condição da atividade e da “qualidade” das ocupações a que acessam.Embora a maioria dos estudantes de ensino superior esteja economicamente inativa, quase um terço consegue trabalhar e estudar simultaneamente, e a maioria tem com uma relação salarial não registrada, mostrando diferenças marcantes de acordo com o gênero e o estrato socioeconômico. No período 2008-2017, observamos a geração de cenários de trabalho cada vez mais diferenciais entre jovens estudantes de diferentes estratos sociais.

Neoliberalismo, democracia y subjetividad: El pueblo como fundamento, estrategia y proyecto; Neoliberalism, democracy and subjectivity: The people as fundament, strategy and project; Neoliberalismo, democracia e subjetividade: O povo como fundamento, estratégia e projeto Stoessel, Soledad; Retamozo, Martin Este artículo se desarrolla a partir de dos interrogantes. El primero es cómo pensar el orden de dominación vigente que llamamos neoliberalismo y el segundo, cómo enfrentarlo en los tiempos contemporáneos en que aquel parece persistir a través de diversos dispositivos y técnicas. El neoliberalismo ha operado como un modo de regulación, una racionalidad y una subjetividad a lo largo del tiempo. Las formas de enfrentarlo, pues, deben contemplar esa triple dimensión. Mediante el voto universal es posible solventar la primera. Para erradicarlo en las otras dimensiones se requiere, en cambio, -y esta es la hipótesis de este texto- construir un sujeto “pueblo” que pueda asumirse como fundamento, estrategia y proyecto, con el horizonte de restituir el vínculo entre soberanía popular y justicia social, en el marco de instituciones democráticas.; The aim of this paper is to answer two questions. The first one is how to think about the contemporary neoliberal order, and the second, how to challenge it when it seems to persist through different devices and techniques. The neoliberalism has operated as a mode of regulation, a rationality and a subjectivity throughout time. The ways of tackling it, then, must contemplate these three dimensions. By means of elections it is possible to solve the first one. In order to face the other dimensions, it is necessary, instead - and this is the hypothesis of this paper- to build the "people" as a subject that works as foundation, strategy and project in the perspective of restoring the link between popular sovereignty and social justice, within the framework of democratic institutions; Este artigo analiza dois questões. A primeira é como pensar sobre a ordem atual de dominação que chamamos neoliberalismo e a segunda, como enfrentá-la nos tempos contemporâneos, quando parece persistir através de vários dispositivos e técnicas. O neoliberalismo tem funcionado como um modo de regulação, uma racionalidade e uma subjetividade ao longo do tempo. As formas de enfrentá-la, então, devem contemplar essa tríplice dimensão. Por meio do voto universal é possível resolver o primeiro. Para erradicá-lo nas outras dimensões, é preciso, ao invés - e esta é a hipótese deste texto -, construir um sujeito "povo" que possa tomar a forma de fundamento, estratégia e projeto, com o horizonte de restabelecer o vínculo entre soberania popular e justiça social, dentro do marco das instituições democráticas.

Las formas de la vitalidad en la recepción de una obra teatral; Forms of vitality in the reception of a theater work Nudler, Alicia Clara; Jacquier, María de la Paz; Español, Silvia Ana En el artículo se describe un estudio empírico realizado con espectadores de una obra deteatro-danza, cuyo objetivo fue explorar la captación de formas de la vitalidad (Stern, 1985 y2010). El estudio se caracteriza por un diseño complejo que implicó (a) la puesta en escenade una obra teatral, (b) la conformación de un estímulo novedoso a partir de la obra, y (c)la creación de tareas a ser realizadas por los espectadores al finalizar la función. La obra a laque asistieron los espectadores/participantes fue Dibaxu del director Hugo Aristimuño. Elestímulo creado fue la proyección de dos fragmentos de la obra filmados en vivo en una delas funciones. Las tareas fueron cuatro: dos tareas no-verbales, originales y novedosas, y dosverbales. Se describen los rasgos particulares de la obra, el proceso de creación del estímulo ylas tareas creadas. Se presentan los resultados de la tarea verbal que consistió en la selecciónde palabras descriptoras de formas de la vitalidad para caracterizar los fragmentos seleccionados de la obra presenciada. Se comentan luego los desafíos metodológicos del estudiode la recepción de espectáculos en vivo, se realizan comparaciones con otros trabajos delcampo, y se resalta la virtud del diseño que permitió crear un estímulo breve que conserva,sin embargo, las cualidades de la obra completa. Finalmente, se discute la contribución de lainvestigación realizada tanto al estudio de las formas de la vitalidad como a los estudios depúblicos de teatro y danza de orientación cognitiva.; This article describes an empirical study conducted with spectators of a theater-dance piece with the goal of exploring the reception of forms of vitality (Stern, 1985 and 2010). The study entails a complex design including a) the production of a live performance; b) the creation of an original stimulus based on the play; c) the design of tasks to be carried by spectators after the show. The performance attended by the spectators/participants was Dibaxu by theater director Hugo Aristimuño. The stimulus was the projection of two excerpts of the play recorded during one of the live performances. The tasks were four: two non-verbal tasks, original and innovative, and two verbal ones. The specific traits of the performance, the process of creation of the stimulus and the tasks carried by participants are described. The results are presented of the verbal task consisting in the selection by participants of forms of vitality words to describe the excerpts. The article also discusses the challenges of studying the reception of live performances, establishes comparisons with other studies in the field, and points to the advantage of designing a short stimulus which nevertheless retains some of the qualities of the whole performance. Finally, it discusses the contribution of the study to the knowledge of forms of vitality and to cognitively oriented research on dance and theater audiences.

Presencia de Aspergillus flavus en lotes de maíz de Santiago del Estero, norte de Córdoba y este de Tucumán Barontini, Javier Miguel; Druetta, Marcelo Alberto; Luna, Ivana Natasha; Torrico Ramallo, Ada Karina; Chulze, Sofia Noemi; Giménez, María de la Paz Argentina se encuentra entre los líderes mundiales en producción de maíz, ocupando el sexto lugar como productor y oscila entre el tercero y cuarto como exportador. En la campaña 2018/19, el país produjo alrededor de 57 millones de toneladas. La región conformada por la provincia de Santiago del Estero, este de Tucumán y norte de Córdoba es responsable de entre 10 y 20 % de la producción nacional, dependiendo de los factores climáticos propios de cada ciclo agrícola.

Impresión 3D en tecnología farmacéutica: MESO PP® un proceso simplificado de obtención de formas farmacéuticas sólidas Barberis, Maria Eugenia; Real, Juan Pablo; Palma, Santiago Daniel La manufactura aditiva, más comúnmente conocida como impresión 3D (I3D) es a todas luces una herramienta que está impactando en muchos campos de la producción (1). La I3D es un proceso que permite crear objetos sólidos a partir de modelos digitales prediseñados, añadiendo el material capa por capa hasta lograr la forma alojada en un archivo digital. Con sólo modificar el diseño y adaptando el archivo de base, es posible crear estructuras geométricas diferenciadas en tamaño y forma, usando exactamente la misma impresora (2, 3).La tecnología de I3D ha sido incorporada hace más de 30 años. Su inventor, Charles Hull, fue quien solicitó la patente del primer aparato destinado a manufactura aditiva en el año 1984.Hull diseñó su primera impresora 3D basada en esterolitografía la cual estuvo comercialmente disponible en el 1988 (4, 5). Desde entonces hasta la actualidad, han aparecido distintos procesos de I3D que utilizan procesos diferentes, velocidades de impresión y resoluciones diferenciales, como así también, diversos materiales. La tecnología farmacéutica ha puesto foco y atención en este tipo de procesos.

Reversals of Reforestation Across Latin America Limit Climate Mitigation Potential of Tropical Forests Schwartz, Naomi B.; Aide, T. Mitchell; Graesser, Jordan; Grau, Hector Ricardo; Uriarte, María Carbon sequestration through tropical reforestation and natural regeneration could make an important contribution to climate change mitigation, given that forest cover in many tropical regions increased during the early part of the 21st century. The size of this carbon sink will depend on the degree to which second-growth forests are permanent and protected from re-clearing. Yet few studies have assessed permanence of reforestation, especially not at a large spatial scale. Here, we analyzed a 14-year time series (2001–2014) of remotely sensed land-cover data, covering all tropical Latin America and the Caribbean, to quantify the extent of second-growth forest permanence. Our results show that in many cases, reforestation in Latin America and the Caribbean during the early 21st century reversed by 2014, limiting carbon sequestration. In fact, reversals of reforestation, in which some or all gains in forest cover in the early 2000s were subsequently lost, were ten times more common than sustained increases in forest cover. Had reversals of reforestation been avoided, forests could have sequestered 0.58 Pg C, over four times more carbon than we estimate was sequestered after accounting for impermanence (0.14 Pg), representing a loss of 75% of carbon sequestration potential. Differences in the prevalence of reforestation reversals across countries suggest an important role for socio-economic, political, and ecological context, with political transitions and instability increasing the likelihood of reversals. These findings suggest that national commitments to reforestation may fall short of their carbon sequestration goals without provisions to ensure long-term permanence of new forests.

Difusión de proyectos de investigación en institutos de formación docente: el caso de un simposio en el sur mendocino Di Marco, María Elisa; Pérez, María de Los Ángeles; García, Gastón César El presente estudio de caso refiere la realización de un Simposio de Investigación Educativa elaborado en el sur de Mendoza para difundir a la comunidad educativa los diferentes proyectos que fueron realizando los docentes de los Institutos de Formación Docente de la jurisdicción mencionada. En este sentido, el trabajo se estructura de la siguiente manera: primero, se ilustra la situación de la investigación educativa en el Nivel Superior enfatizando su importancia en Argentina, especialmente en el sur de Mendoza, junto con algunas consideraciones generales sobre cómo se comunican los resultados de los proyectos dentro de la misma institución; y segundo, una descripción del simposio junto con los resultados extraídos de encuestas realizadas a los docentes participantes, tanto en la inscripción como en la evaluación del evento. A modo de conclusión se realizan algunas reflexiones sobre la necesidad de generar este tipo de espacios para responder a las necesidades de difusión y comunicación de los proyectos de investigación docente en comunidades educativas.; This case study is about the execution of a symposium about education investigation made in southern Mendoza to dissemination the different projects that were carried out by teachers in the teacher training colleges in the jurisdiction before mentioned among the education community. In this sense this study is structured as follows: first, the situation of the education investigation in the southern Mendoza is illustrated emphasizing its importance in Argentina, especially in the south of Mendoza, together with some general considerations about how project results are communicated within the same institution; second, a description of the symposium along with the results taken form surveys made to participating teachers, not only in their registration but also in the event examination. Conclusions will be drawn about some reflections about the need to create this kind of space to reach to the need of spread and communication of the teacher investigation projects in education communities.

Fractional and integer stages of lithium ion-graphite systems: The role of electrostatic and elastic contributions Gavilán Arriazu, Edgardo Maximiliano; Hümöller, Juan Martin; Pinto, Oscar Alejandro; De Mishima, B. A. López; Leiva, Ezequiel Pedro M.; Oviedo, Oscar Alejandro In the present work, we analyze the hot topic of integer and fractional stages of lithium-ion batteries by using Monte Carlo simulations. While fractional stages have been demonstrated through several experimental, simulation and theoretical measurements, in other experimental techniques, such as electrochemical ones, there is no evidence for them. In previous work, we have analyzed the thermodynamics and kinetics of lithium-ion intercalation using a potential based on empirical parameterization, where multiple stages (integer and fractional) were found and analyzed. The present simulations suggest that if we consider repulsive elastic interactions in addition to electrostatic ones, the Hamiltonian symmetry is broken and there is no evidence for fractional stages. The physical origin of these repulsive interactions is assigned to the increasing graphite layer separation during lithium-ion intercalation. In the light of these simulations, selected experimental data are revisited, validating the presented novel parameterization. The parametrization used here can be used for other kinds of intercalation compounds, such as those involving Na or K.

Análisis preliminar de diatomeas holocénicas del sitio arqueológico para Yacu 1, Santiago del Estero- Argentina; Análisis preliminar de diatomeas holocenicas del sitio arqueológico para Yacu 1, Santiago del Estero- Argentina Perez Pincheira, Egly Veronica; Leon, Diego Catriel En el presente trabajo se presentan los resultados preliminares del análisis de diatomeas recuperadas en dos cuadrículas en el sitio arqueológico Para Yacu 1, Santiago del Estero-Argentina. La temporalidad relativa de estas biomineralizaciones, correspondiente al holoceno, se estableció a partir de su asociación a restos de cerámica prehispánica. Estos estudios permitieron inferir dos situaciones microambientales: 1) condiciones de humedad coincidentes con un cuerpo de agua y 2) momentos de desecación. Este último estado habría permitido el asentamiento humano recurrente en este espacio.; This paper presents the preliminary results of the analysis of diatoms recovered in two grids at the archaeological site Para Yacu 1, Santiago del Estero-Argentina. The relative temporality of these biomineralizations, corresponding to the Holocene, refers from their association to pre-Hispanic potery remains. These studies allowed two microenvironmental situations to be inferred: 1) moisture conditions coincident with a body of water and 2) moments of drying. The latter state would have allowed recurrent human settlement in this space.

Glaciomarine sequence stratigraphy in the Mississippian Río Blanco Basin, Argentina, southwestern Gondwana: Basin analysis and palaeoclimatic implications for the Late Paleozoic Ice Age during the Tournaisian Ezpeleta, Miguel; Rustán, Juan José; Balseiro, Diego; Davila, Federico Miguel; Dahlquist, Juan Andrés; Vaccari, Norberto Emilio; Sterren, Andrea Fabiana; Prestianni, Cyrille; Cisterna, Gabriela Adriana; Basei, Miguel The Late Paleozoic Ice Age (LPIA) has been well recorded in the uppermost Mississippian?Pennsylvanian of Gondwana. Nevertheless, little is known about the temporal and geographic dynamics, particularly during the early Mississippian. We report on exceptional Tournaisian glaciomarine stratigraphic sections from central Argentina (Río Blanco Basin). Encompassing c. 1400 m, these successions contain conspicuous glacigenic strata with age constraints provided bypalaeontological data and U/Pb detrital zircon age spectra. A variety of marine, glaciomarine and fan-deltaic environments indicate relative sea-level variations mainly associated with tectonism and repetitive cycles of glacial activity. Provenance analysis indicates a source from the Sierras Pampeanas basement located to the east. Fifteen sequences were grouped into threedepositional models: (1) Transgressive Systems Tracts (TST) to Highstand Systems Tracts (HST) sequences unaffected by glacial ice; (2) Lowstand Systems Tracts (LST) to TST and then to HST with glacial influence; and (3) non-glacial Falling-Stage Systems Tracts (FSST) to TST and HST. The glacial evidence indicates that the oldest Mississippian glacial stage of the LPIA in southwestern Gondwana is constrained to the middle Tournaisian. In contrast with previous descriptions of Gondwanan coeval glacial records, our sequence analysis confirms complex hierarchical climate variability, rather than a single episode of ice advance and retreat.

Increased expression of autophagy protein LC3 in two patients with progressing chronic lymphocytic leukemia Arroyo, Daniela Soledad; Rodríguez, Cecilia Inés; Bussi, Claudio; Manzone Rodriguez, Clarisa; Sastre, Darío; Heller, Viviana; Stanganelli, Carmen Graciela; Slavutsky, Irma Rosa; Iribarren, Pablo Chronic lymphocytic leukemia (CLL) is the most common type of adult leukemia in the western hemisphere. It is characterized by a clonal proliferation of a population of CD5+ B lymphocytes that accumulate in the secondary lymphoid tissues, bone marrow, and blood. Some CLL patients remain free of symptoms for decades, whereas others rapidly become symptomatic or develop high-risk disease. Studying autophagy, which may modulate key protein expression and cell survival, may be important to the search for novel prognostic factors and molecules. Here, we applied flow cytometry technology to simultaneously detect autophagy protein LC3B with classical phenotypical markers used for the identification of tumoral CLL B cell clones. We found that two patients with progressing CLL showed increased expression of the autophagy protein LC3B, in addition to positive expression of CD38 and ZAP70 and unmutated status of IGHV. Our data suggest that activation of autophagy flux may correlate with CLL progression even before Ibrutinib treatment.

Early eocene spore and pollen assemblages from the laguna del hunco fossil lake beds, patagonia, argentina Barreda, Viviana Dora; Zamaloa, María del Carmen; Gandolfo, María A.; Jaramillo, Carlos; Wilf, Peter Premise of research. The early Eocene Laguna del Hunco (LH) fossil site, northwestern Chubut Province, Argentina, holds one of the best-preserved and most diverse paleofloras worldwide. The paleoflora comprises ferns, gymnosperms, and flowering plants. Despite the rapidly growing knowledge of its macrofossil record, little is known about the site’s palynological content. Herein, we present the first dispersed spore-pollen assemblages recovered from LH. Methodology. Palynological samples were collected from seven stratigraphic levels of the Tufolitas de LH (Huitrera Formation), of which six yielded palynomorphs. We determine the botanical affinities of fossil morphotypes and provide systematic descriptions of some taxa. In addition, we establish similarities between LH and other Patagonian Eocene localities, and we compare palynological and prior megafloral records from LH. Pivotal results. We identify 56 spore and pollen species and 28 plant families, of which eight (Cyatheaceae, Schizaeaceae, Polypodiaceae, Asteraceae, Chloranthaceae, Nothofagaceae, Rubiaceae, and Ulmaceae) are reliably reported from the site for the first time. Among other Eocene Patagonian palynofloras, the LH assemblage is similar to Pampa de Jones/Nahuel Huapi Este and Confluencia. Conclusions. The LH spore-pollen assemblages augment the plant fossil record for this significant Eocene locality by incorporating new taxa (e.g., Asteraceae, with one morphotype that represents the oldest record of the family in Patagonia). The new data also reinforce the presence of plant families previously reported from macrofossils, such as Juglandaceae, with pollen grains similar to those of the Engelhardia-Alfaroa group, and Fagaceae (Castaneoideae), complementing the macrofossil record of leaves and reproductive structures.

Economías sexoafectivas: significados, prácticas y relaciones en tensión en contextos petroleros de la Patagonia Argentina; Sexual-affective economies: meanings, practices, and relationships in tension in oil industry contexts of Argentine Patagonia Cabrapan Duarte, Melisa Gisel En este artículo, se analiza la configuración de las economías sexoafectivas en torno a la prostitución en contextos petroleros de la Patagonia argentina. Además, se estudian las diferentes dinámicas conyugales y familiares entre hombres y mujeres que se vincularon sexoafectivamente a través del mercado sexual o fuera de él, y que desenvuelven y sostienen económicamente sus vidas en contextos dependientes de la actividad hidrocarburífera. El objetivo es, a partir de las experiencias y discursos de diferentes actores, indagar en cómo se construye y significa la cotidianidad de esos relacionamientos, y el modo en que se expresan las tensiones entre la sexualidad, el afecto y la economía.; This article analyses the conformation of the sexual-affective economies around prostitution in oil industry contexts of Argentine Patagonia. Likewise, it studies different conjugal and family dynamics, between men and women that were involved sexual-affectively through the sex-trade context or outside of it, and who developed and sustained their lives in a local economy that is dependent on the oil and gas industry. The purpose is, based on the experiences and discourses of different actors, to analyze hoy everyday life is built in those relationships, what do they mean and how the tensions between sexuality, affection, and the economy are expressed.

Influencia del método de dispersión en el fraccionamiento físico de un suelo de Argentina central; Four dispersion methods, typically applied to soil physical fractionation protocols, were compared in a Mollisol from mountain grasslands from central Argentina. The proportion of coarse and fine soil fractions obtained after dispersion was significantly different. Considering that mineral fractions after dispersion using glass beads did not differ from granulometric analysis, this method achieved better results than sonication or shaking with chemical dispersant for evaluated soils. Pestoni, Sofía; Gallardo, Norma; Pérez Harguindeguy, Natalia; Kowaljow, Esteban Se compararon cuatro métodos de dispersión de suelos, ampliamente utilizados en protocolos de fraccionamiento físico, sobre un Molisol de pastizales montañosos del centro de Argentina. La proporción de las fracciones fina y gruesa del suelo varió significativamente entre métodos. Debido a que las fracciones minerales post dispersión con bolitas de vidrio no difirieron del resultado del análisis granulométrico, este método mostró los mejores resultados, por sobre la sonicación y el agitado con dispersante químico, para los suelos evaluados.

Crustal seismicity in the Andean Precordillera of Argentina using seismic broadband data Venerdini, Agostina Lia; Alvarado, Patricia Monica; Ammirati, Jean Baptiste; Podesta Di Santo, Marcos Gaston; López, Luciana; Fuentes, Facundo; Linkimer, Lepolt; Beck, Susan In this study, we analyze 100 crustal Precordilleran earthquakes recorded in 2008 and 2009 by 52 broadbandseismic stations from the SIEMBRA and ESP, two temporary experiments deployed in the Pampeanflat slabregion, between the Andean Cordillera and the Sierras Pampeanas in the Argentine Andean backarc region.In order to determine more accurate hypocenters, focal mechanisms and regional stress orientations, werelocated 100 earthquakes using the JHD technique and a local velocity model. The focal depths of our relocatedevents vary between 6 and 50 km. We estimated local magnitudes between 0.4≤ML≤5.3 and momentmagnitudes between 1.3≤Mw≤5.3. Focal mechanisms were determined from new hypocenter relocations andfirst motion P-wave polarities. Our solutions exhibit a majority of the earthquakes with reverse faulting me-chanism. Regional stress tensor from the inversion of P- and T-axis orientations, shows a maximum stress axis(σ1) almost horizontal with a strike of 85° and a minimum stress axis (σ3) almost vertical.We correlate this small-to-moderate magnitude seismicity with the presence of large basement structuresbeneath the Iglesia-Calingasta Basin in the west and the Eastern Precordillera in the east. The nucleation of deepearthquakes beneath the Iglesia Basin could be related to the presence of a major ramp accommodating thecrustal shortening between the Frontal Cordillera and the Precordillera. The crustal seismicity beneath thePrecordillera seems to correlate with west-dipping structures rooting deep into the Cuyania basement suggestinga thick-skinned basement deformation system beneath the Precordillera and its shallow thin-skinned fold andthrust belt.