Wind-eroded nitrogen balance in an entic haplustoll under different tillage conditions Abascal, Sergio Alberto; Buschiazzo, Daniel Eduardo; Asensio, Carlos Little information is available on the combined effect of weather conditions and tillage systems on nitrogen lost from wind erosion.A field study was carried out on an Entic Haplustoll to analyze N content in the eroded material. Field measurements were madeduring the winter fallow (WF) and summer fallow (SF) periods in conventional (CT) and a no-till (NT) fields. Winters are morehumid and less windy than summers. Results showed that there were N losses and gains by the wind with both tillage systems andin both seasons. Highest N gains in the crop cycle were 17.1 kg ha-1and maximum losses 7.5 kg ha-1. N gains were detected underhigh mass flow (the amount of wind-transported material entering the plots from external sources), vegetation cover and soil surfaceroughness conditions. When these variables were low, N was lost (or gains were low). Tillage system affected N transport morethan season, through its effect on the soil surface cover (mainly with NT) or soil surface roughness (mainly with CT). Only whenthe mean wind speed was 2.3 times higher than the threshold wind speed was the effect of tillage on N transport by wind negligibleunder both NT and CT.

First nearly complete skull of Gallotia auaritae (lower-middle Pleistocene, Squamata, Gallotiinae) and a morphological phylogenetic analysis of the genus Gallotia Cruzado Caballero, Penélope; Castillo Ruiz, Carolina; Bolet, Arnau; Colmenero, Juan Ramón; De la Nuez, Julio; Casillas, Ramón; Llacer, Sergio; Bernardini, Federico; Fortuny, Josep The Canary Islands are an Atlantic archipelago known for its high number of endemic species. Among the most known endemic vertebrate species are the giant lizards of the genus Gallotia. We describe the cranial osteology of the first almost complete and articulated fossil skull of the taxon Gallotia auaritae, recovered from the lower-middle Pleistocene of the La Palma island. In this work, X-ray computed microtomography images were used to perform an exhaustive phylogenetic analysis where most of the extant and fossil species of the genus Gallotia were included for first time. This analysis recovered a monophyletic Gallotia clade with similar topology to that of molecular analyses. The newly described specimen shares some characters with the group formed by G. bravoana, G. intermedia and G. simonyi, G. auaritae, and its position is compatible with a referral to the latter. Our study adds new important data to the poorly known cranial morphology of G. auaritae, and the phylogenetic analysis reveals an unexpected power of resolution to obtain a morphology-based phylogeny for the genus Gallotia, for inferring the phylogenetic position of extinct species and for helping in the identification of fossil specimens.

Escenas de una vida bohemia en la noche setentista: Memorias de María Moreno Viu Adagio, Julieta El libro de memorias Black out (2016) de María Moreno recrea momentos particulares del campo cultural y artístico argentino que muestran otra cara de los años setenta: se trata de una bohemia que se involucra en una política de los textos antes que en una política en los textos. Con esa escritura propia de la autora, alejada de cualquier simplismo y no exenta de ironía, Moreno repasa noches compartidas con colegas de redacción, historias de excesos y alcohol, poniendo en juego preceptos familiares y morales. Desde una perspectiva biopolítica, en este artículo, señalamos la desnaturalización de ordenamientos y jerarquías establecidos al cuestionar de lleno mandatos sociales instituidos sobre los cuerpos individuales y colectivos.; Black out (2016) by María Moreno is a memoir that recreates particular moments of the Argentine cultural and artistic field that shows another face of the seventies: a bohemian that gets involved in a politics of the texts rather than a policy in the texts. With that writing away from any simplicity, not without irony, Moreno reviews shared nights with colleagues, stories of excess and alcohol, putting into play family and moral precepts. From a biopolitical perspective, in this article we point out the denaturalization of established orders and hierarchies by fully questioning the social mandates instituted on individual and collective bodies.

El mestizaje en América Latina durante la primera mitad del siglo XX; A mestiçagem na América Latina na primeira metade do século XX Mailhe, Alejandra Marta ¿Por qué alquimia se mezclan las culturas? ¿Qué noción de sujeto subyace al mestizaje como proceso? ¿Es posible pensar el mestizaje por fuera de la dialéctica hegeliana? ¿Y qué connotaciones políticas anidan bajo cada modelo teórico? Me propongo indagar en torno a estas preguntas considerando algunos ensayos latinoamericanos de las primeras décadas del siglo XX, en los cuales el problema teórico del mestizaje resulta central para definir la identidad nacional y continental. Para ello, atenderé a algunos textos que elogian el mestizaje indohispánico en Argentina, México y Perú, de Ricardo Rojas, Manuel Gamio, José Vasconcelos y José Uriel García.; Por meio de que alquimia se misturam as culturas? Que noção de sujeito subjaz à mestiçagem como processo? É possível pensar a mestiçagem por fora da dialética hegeliana? E que conotações políticas aninham sob cada modelo teórico? Eu me proponho indagar em torno dessas perguntas considerando alguns ensaios latino-americanos das primeiras décadas do século XX, nos quais o problema teórico da mestiçagem resulta central para definir a identidade nacional e continental. Para isso, atenderei a alguns textos que elogiam a mestiçagem indohispânica em Argentina, México e Perú, de Ricardo Rojas, Manuel Gamio, José Vasconcelos e José Uriel García.

Translational research in pituitary tumours Stalla, Günter K; Dimopoulou, Christina; Jung Sievers, Caroline; Arzt, Eduardo Simon; Paez Pereda, Marcelo; Theodoropoulou, Marily; Ciato, Denis; Renner, Ulrich Although effective treatment regimens (surgical resection, drug treatment with dopamine agonists or somatostatin analogues, radiotherapy) have been established for the therapy of most pituitary tumours, a considerable proportion of affected patients cannot completely cured due to incomplete resection or drug resistance. Moreover, even if hormone levels have been normalized, patients with hormone-secreting tumours still show persistent pathophysiological alterations in metabolic, cardiovascular or neuropsychiatric parameters and have an impaired quality of life. In this review reasons for the discrepancy between biochemical cure and incomplete recovery from tumour-associated comorbidities are discussed and the clinical management is delineated exemplarily for patients with acromegaly and Cushing's disease. In view of the development of additional treatment concepts for the treatment of pituitary adenomas we speculate about the relevance of RSUME as a potential target for the development of an anti-angiogenic therapy. Moreover, the role of BMP-4 which stimulates prolactinoma development through the Smad signalling cascade is described and its role as putative drug target for the treatment of prolactinomas is discussed. Regarding the well-known resistance of a part of somatotropinomas to somatostatin analogue treatment, recently identified mechanisms responsible for the drug resistance are summarized and ways to overcome them in future treatment concepts are presented. Concerning novel therapeutic options for patients with Cushing's disease the impact of retinoic acid, which is currently tested in clinical studies, is shown, and the action and putative therapeutic impact of silibinin to resolve glucocorticoid resistance in these patients is critically discussed.

Hernán Ronsino, por una literatura humana. Notas sobre un escritor necesario Linares, Maximiliano "Vuelvo a elegir un relato de Ronsino con la esperanza de aclarar algunos motivos, expresa Beatriz Sarlo en el comienzo del ensayo número 15, 'Crimen pasional'", de los 33 que componen Ficciones argentinas (Mardulce, 2012). La producción del narrador bonaerense Hernán Ronsino (Chivilcoy, 1975) restituye la incomodidad pertinente a un canon pedagógico que no acostumbra prestar atención sino a aquello que se emplaza de modo acompasado a sus dictados o a aquello otro que lo interpela desde la diferencia o disidencia explícita. Sarlo, un poco más adelante, explicita: "Ronsino se ubica de modo deliberado, estéticamente consciente, en línea de diálogo con Juan José Saer, con Haroldo Conti, escritores a los que no se les escatima el reconocimiento pero de quienes la mayor parte de la ´literatura [argentina] actual´ permanece alejada, como si fueran un continente exhausto y todas las riquezas estuvieran en los dominios cuyo primer mapa trazó Manuel Puig". Las novelas de Ronsino La descomposición (2007), Glaxo (2009) y Lumbre (2013) parecerían no cumplimentar ninguna de las tres coordenadas dispuestas por las acertadas prerrogativas de la marginalidad en el campo literario (Jitrik, 1970): 1. El estilo de Ronsino conoce por completo los principios estéticos del discurso canónico; 2. No registramos un gesto deliberado ni no deliberado antihegemónico, los principios productivos se adecúan sin problema al movimiento del mercado; y 3. No visualizamos tampoco un posicionamiento y su consecuente neutralización provocados por disputas o rencillas literarias. Sin embargo, Ronsino no goza de la aceptación o popularidad de otros narradores contemporáneos (Cucurto, Incardona, Cabezón Cámara, Almada, entre otros [la mención de estos autores simplemente para contrastar el desconocimiento de Ronsino no por el hecho de que las poéticas de cada uno sean plausibles de comparación]) y, para expresarlo posicionados desde el eje seleccionado: tensiona internamente movimientos de inclusión o exclusión, por ejemplo cuando incomoda a su manera a un canon pedagógico que no resuelve cómo incorporarlo, cómo enseñarlo. Estos aspectos centrales para la lectura de la trilogía pampeana de Ronsino y, además, la combinación que produce la aparición de su último libro Cameron (2018) -en primera instancia fuera de ese territorio ficcional pampeano- nos habilitan a pensar y escandir nuestras notas sobre Hernán Ronsino como un escritor necesario.

Near-Field Enhancement Contribution to the Photoactivity in Magnetite-Gold Hybrid Nanostructures Guzman, Federico Valentin; Mercadal, Pablo Agustin; Coronado, Eduardo A.; Encina, Ezequiel Roberto Hybrid nanostructures composed of magnetic iron oxides and plasmonic metals can convert light energy into chemical energy, and they can be easily manipulated through magnetic fields. As a consequence of these multifunctional features, they can be employed as magnetically recyclable heterogeneous photocatalysts. Herein, we report a two-step method for the preparation of magnetite (Fe3O4)-gold (Au) hybrid nanostructures in aqueous media. The obtained material resembles a core-satellite morphology of 60 nm Fe3O4 nanoparticles surrounded by nearly 20 nm spherical Au nanoparticles attached to their surface. The synthesized hybrid material exhibits enhanced capabilities for methylene blue photodegradation compared with bare Fe3O4 nanoparticles. Detailed electrodynamics simulations were performed to achieve further insight into the improved photoactive properties of the Fe3O4-Au hybrid nanostructures. The theoretical results show that the excitation of localized surface plasmon resonances in the Au component leads to greater light absorption in the Fe3O4 component, which ultimately impacts the improved photocatalytic properties of the hybrid nanostructure. Overall, this work provides a complementary approach toward a complete understanding of the enhanced photoactive properties of hybrid nanostructures and highlights the importance of considering their actual morphology into simulations.

Flora Urbana: del Centro-Oeste de Argentina. Myrtaceae Martinez Carretero, Eduardo Enrique Se dan a conocer las especies de los géneros melaleuca, Callistemom y Psidium integrantes de la flora urbana de Mendoza y San Juan.

Salud del vellón: Avances en el conocimiento de la "Lana Sisal" Abdala, Alejandra Mariana; Robles, Carlos Alejandro La Lana Sisal es una dermatitis infecciosa caracterizada por la presencia de manchones oscuros en el vellón, que afecta a ovinos Merino de la Patagonia y cuya etiología permanecía incierta hasta el momento. Dado que produce un deterioro del vellón, genera pérdidas económicas al momento de la venta de la lana.

Free Womb Law, Legal asynchronies and Migrations: suing for an enslaved woman´s child in nineteenth century Rio de la Plata Candioti, Magdalena This article analyzes in depth the history of Petrona, an enslaved woman sold in Santa Fe (Argentina), sent to Buenos Aires and later possibly to Montevideo (Uruguay). By reconstructing her case, the article demonstrates how the legal status of enslaved persons was affected by the redefinitions of jurisdictions and by the forced or voluntary crossings between political units. This study also shows the circulation and uses of the Free Womb law in Argentina and Uruguay and traces legal experts' debates over its meaning. At the same time, it reflects on the knowledge enslaved people had of those abolitionist norms and how they used them to resist forced relocations, attempt favorable migrations, or achieve full freedom. The article crosses analytical dimensions and historiographies-legal, social, and political- and articulates them by reflecting more broadly on these factors: the impact of the revolution of independence on enslaved persons' lives, the scarce circulation of abolitionist public discourse in Río de la Plata, the gendered bias of the process, and the central yet untold uses of antislavery rhetoric in the national narratives.

Origin and Evolution of Two Independently Duplicated Genes Encoding UDP- Glucose: Glycoprotein Glucosyltransferases in Caenorhabditis and Vertebrates Caraballo, Diego Alfredo; Buzzi, Lucila Inés; Acosta Montalvo, Ana Gabriela; Modenutti, Carlos Pablo; Castro, Olga Alejandra; Rossi, Maria Susana UDP- glucose: glycoprotein glucosyltransferase (UGGT) is a protein that operates as the gatekeeper for the endoplasmic reticulum (ER) quality control mechanism of glycoprotein folding. It is known that vertebrates and Caenorhabditis genomes harbor two uggt gene copies that exhibit differences in their properties.Bayesian phylogenetic inference based on 195 UGGT and UGGT-like protein sequences of an ample spectrum of eukaryotic species showed that uggt genes went through independent duplications in Caenorhabditis and vertebrates. In both lineages, the catalytic domain of the duplicated genes was subjected to a strong purifying selective pressure, while the recognition domain was subjected to episodic positive diversifying selection. Selective relaxation in the recognition domain was more pronounced in Caenorhabditis uggt-b than in vertebrates uggt-2. Structural bioinformatics analysis revealed that Caenorhabditis UGGT-b protein lacks essential sequences proposed to be involved in the recognition of unfolded proteins. When we assayed glucosyltrasferase activity of a chimeric protein composed by Caenorhabditis uggt-b recognition domain fused to S. pombe catalytic domain expressed in yeast, no activity was detected.The present results support the conservation of the UGGT activity in the catalytic domain and a putative divergent function of the recognition domain for the UGGT2 protein in vertebrates, which would have gone through a specialization process. In Caenorhabditis, uggt-b evolved under different constraints compared to uggt-a which, by means of a putative neofunctionalization process, resulted in a non-redundant paralog. The non-canonical function of uggt-b in the worm lineage highlights the need to take precautions before generalizing gene functions in model organisms.

Reconfiguración del oligopolio mundial y cambio tecnológico frente a la agricultura 4.0: implicancias para la trayectoria de la maquinaria agrícola en Argentina; Reconfiguration of the world oligopoly and technological change vis-à-vis the agriculture 4.0: implications for the trajectory of agricultural machinery in Argentina Lavarello, Pablo Jose; Bil, Damián Andrés; Vidosa, Regina; Langard, Federico Este trabajo analiza la denominada agricultura 4.0 como el proceso actual de convergencia entre la industria de maquinaria agrícola y las nuevas tecnologías digitales, y plantea que este es expresión de la creciente rivalidad al interior de los oligopolios mundiales. En este marco, este trabajo discute cómo las relaciones estables entre los miembros del oligopolio son puestas en tensión en el plano de la competencia tecnológica por el control de las plataformas y los estándares en la transferencia de datos. Se analiza cómo la trayectoria histórica de esta industria en Argentina y su evolución reciente se ven afectadas por la difusión de la agricultura de precisión, planteando los desafíos que implica para esta industria.; This work analyzes the agriculture 4.0 as the contemporary convergence process between the agriculture machinery industry and the new digital technologies, which refletcts an increasing rivalry in global oligopolies. From this framework, it discusses how stable relationships among oligopoly members are jeopardized as soon as different oligopolies fight for the control of global platforms and data standards. This work analyzes how the historic trajectory of Argentine’s agriculture machinery has been affected by recent diffusion of precision agriculture, and the challenges for this industry.

Un análisis histórico y geográfico de la articulación de actores sociales en la apertura de escuelas de alternancia; A historical and geographic analysis of the ways in which social actors articulate their practice in order to establish pedagogy of alternation schools Miano, María Amalia; Heras Monner Sans, Ana Ines Realizamos una reconstrucción histórica y geográfica del surgimiento y desarrollo de la pedagogía de la alternancia tal como se fue generando en diferentes continentes, centrándonos en las experiencias de Francia, Brasil y Canadá. Interpretamos la forma en que diversos actores sociales se han auto organizado en distintos países para abrir y sostener en el tiempo escuelas rurales de alternancia. Nos hemos preguntado: ¿en qué momentos y lugares se configuran procesos de auto organización comunitaria para abrir escuelas que permitan a los jóvenes de ámbitos rurales continuar con sus estudios luego de la educación primaria? ¿Qué actores sociales participan en cada caso y a qué tipos de demandas responden? Nuestros resultados muestran que la expansión de la pedagogía de la alternancia en el mundo se fue realizando a partir de contactos entre grupos que comparten una orientación similar en diferentes lugares geográficos (respeto por las formas culturales de la ruralidad, interés en construir instituciones educativas que permitan la participación de diferentes actores sociales, generación de herramientas pedagógicas distintivas). Así, esta pedagogía puede considerarse, tal como algunos de sus antecedentes lo indican, como un movimiento (inclusive de carácter internacional) conservando sin embargo el carácter singular de cada experiencia en cada historia y geografía particular.; We present an analysis of the pedagogy of alternation based on a historical and geographical reconstruction of its origins and development. We also specifically discuss how this type of schooling process took place in France, Brazil and Canada. We focus on the ways in which different social actors self-organized in order to create and sustain rural schools over time. Our guiding questions were: Where and when do community processes of self organization take place so that these kinds of schools are opened and students can continue their secondary education in rural areas? What are the specific social actors that participate and to what specific community needs do they respond? Our findings show that the pedagogy of alternation established itself worldwide in as much as a network of different social actors developed because they identified themselves with core orientation, regardless of their geographical location, as follows: respect for rural cultural ways of living; interest in creating schools that allow for diverse social actors’ participation; construction of specific pedagogical tools. Therefore, this pedagogy may be considered as a movement worldwide yet simultaneously situated in each specific social, historical and geographical context.

La representación de la cultura popular y letrada en Martín Fierro y en las traducciones al italiano de Giovanni Meo Zilio, Folco Testena y Crocitto Cuonzo; The representation of popular and elite culture in Martín Fierro and in Giovanni Meo Zilio, Folco Testena and Crocitto Cuonzo's Italian translations Iriarte, Sara Jaquelina El presente artículo examina la representación del saber popular y letrado enlas traducciones italianas del Martín Fierro de José Hernández centrándose en el análisis de los cantos I y XVI de La vuelta de Martín Fierro, donde se pone de manifiesto la relación conflictiva entre la cultura del gaucho y los saberes ilustrados. El estudio propuesto consiste, primero, en develar los recursos poéticos y narrativos empleados por Hernández para dar cuenta de la fractura entre ambos saberes y el divorcio entre sus lugares de enunciación. En segundo lugar, se abordan desde un punto de vista descriptivo las estrategias desarrolladas por Giovanni Meo Zilio, Folco Testena y los hermanos Crocitto Cuonzo para recrear en la lengua italiana dichos recursos hernandianos, con especial énfasis en aquellos que inciden en la forma poética a nivel lexical y cuyas resonancias semánticas representan un gran desafío para el traductor.; This article examines the representation of popular and elite culture in the Italian translations of José Hernández's Martín Fierro, with a focus on the analysis of parts I and XVI of The Return of Martín Fierro, where the conflicting relationship between gaucho's and elite culture is brought to light. The study proposed consists in, firstly, revealing the poetic and narrative resources used by Hernández to account for the gap between both types of knowledges and the severance between their places of enunciation; and secondly, addressing descriptively the strategies used by Giovanni Meo Zilio, Folco Testena and Crocitto Cuonzo brothers and to recreate Hernández's resources in the Italian language, with a special emphasis on those which have an impact on the poetic form at a lexical level and whose semantic resonances pose a considerable challenge for the translator.

Pruebas de inhibición de Bacillus subtilis sobre hongos transportados por hormigas invasoras de colmenas apícolas; Bacillus subtilis inhibition tests on fungus transported by invasive ants from honey bee hives Ruiz, Gisela Beatriz; Retamoso, Rosa Milagro; Benitez Ahrendts, Marcelo Rafael Las hormigas son visitantes comunes de las colmenas de abejas, suelen tenermicroorganismos adheridos a sus cutículas. La humedad y la estabilidad de la temperatura,las predisponen a infecciones, pudiendo diseminar los agentes patógenos en la colmena.El objetivo de este trabajo fue evaluar el efecto antagónico de la bacteria Bacillus subtilis frente a los hongos Aspergillus sección nigri y Penicillium serie crhysogenum aislados de las cutículas de hormigas establecidas en colmenas de Apis mellifera L. Para ello se recolectaron hormigas del interior de colmenas de un apiario de la localidad de Rio Blanco, las cuales fueron suspendidas en solución de peptona al 10%. Se sembraron alícuotas de la solución sobre agar Malta e incubaron a 27ºC durante 7 días, siendo luego enfrentadas con la bacteria. Se tomó la medición del diámetro de crecimiento de las colonias de los hongos en presencia del antagonista a los 5, 10 y 15 días de incubación. Se calculó el porcentaje de inhibición obteniendo para Aspergillus sección nigri menos del 50% y para Penicillium seriechrysogenum promedios mayores al 70%. Destacando que a partir del día 15 de incubación se observaron mayores porcentajes de inhibición de los hongos. El análisis estadístico evidenció diferencias significativas entre las muestras testigos y la de los hongos enfrentados con la bacteria Bacillus subtilis presenta actividad antifúngica frente a los hongos en estudio, controlando efectos negativos en la producción de las abejas como en las propias hormigas.; Ants are common visitors to bee hives, often having microorganisms attached to their cuticles. Humidity and temperature stability predispose them to infections, being able to spread pathogens in the hive. The objective of this study was to evaluate the antagonistic effect of Bacillus subtilis bacteria against fungi Aspergillus section nigri and Penicillium series chrysogenum isolated from ants cuticles established in Apis mellifera L.hives. For this, ants species inside hives were collected from an apiary in Rio Blanco town, which were suspended in 10% peptone solution. Aliquots of the solution were sown in Malta agar and incubated at 27°C for 7 days, and then confronted with the bacteria. The measurement of the growth diameter of fungal colonies was taken in the presence of the antagonist at 5, 10 and 15 days of incubation. The inhibition percentage was calculated obtaining for Aspergillus section nigri less than 50% and for Penicillium series chrysogenum averages higher than 70%. Highlighting as of the 15th day of incubation, greater percentages of fungal inhibition were observed. Statistical analysis showed significant differences between the witnesses samples witnesses and fungi faced with the Bacillus subtilis bacteria has antifungal activity in the presence of fungi under study, controlling negative effects on bees production as well as on ants themselves.

Evaluación de la actividad antimicrobiana in vitro de extractos de hojas de diferentes cultivares de Fragaria ananassa Duch. para la formulación de bioinsumos fitosanitarios; Evaluation of the in vitro antimicrobial activity of leaves extracts of different cultivars of Fragaria ananassa Duch. for phytosanitary bioproducts formulation Cerviño Dowling, Ana María; Grellet Bournonville, Carlos Froilan; Di Peto, Pía de Los Ángeles; Rodríguez, L. C.; Castagnaro, Atilio Pedro; Filippone, María Paula; Mamani, Alicia Ines de Fatima En este trabajo se caracterizaron extractos metanólicos y acuosos de hojas de Fragaria ananassa Duch. de los genotipos “Camarosa”, “Camino Real”, “Merced”, “Benicia” y “San Andreas” (este último de dos procedencias: Tafí del Valle, Tucumán, y Patagonia), en base al contenido de compuestos fenólicos totales y a la capacidad para inhibir el crecimiento de bacterias y hongos fitopatógenos. No se observaron diferencias significativas en el contenido de fenólicos a excepción del extracto metanólico (EM) del genotipo “Merced” que presentó el mayor valor y los extractos acuosos (EA) de los genotipos “San Andreas” de Tafí del Valle y “Camarosa”, que fueron los de menor contenido. Las bacterias mostraron mayor sensibilidad que los hongos a los EM, mientras que en el caso de los EA ambos tipos de microorganismos mostraron una sensibilidad similar. No se observó una relación directa entre el contenido de compuestos fenólicos totales y la actividad antimicrobiana. Aunque algunos genotipos de frutilla mostraron actividad antimicrobiana específica, en general todos los genotipos evaluados presentaron un comportamiento similar. Se destacan los extractos acuosos para el desarrollo de un bioinsumo de bajo costo de producción, aprovechando los residuos de cosecha del cultivo de frutilla.; In this work, methanolic and aqueous extracts from leaves of five genotypes of Fragaria ananassa Duch. were characterized based on their total phenolic compounds content and the ability to inhibit the growth of bacterial and fungal phytopathogens. Genotypes studied were: “Camarosa”, “Camino Real”, “Merced”, “Benicia” and “San Andreas” (this last one from two origins: Tafí del Valle, Tucumán and Patagonia). No significant differences were observed in the phenolic content except for the methanolic extract (ME) of the “Merced” genotype that presented the highest value and the aqueous extracts (AE) of the “San Andreas” genotypes from Tafí del Valle and “Camarosa”, which exhibited the lowest value. Bacteria showed greater sensitivity than fungi to ME, whereas in the case of AE both types of microorganisms showed a similar sensitivity. No direct correlation was observed between the content of total phenolic compounds and the antimicrobial activity. Although some strawberry genotypes showed specific antimicrobial activity, in general all evaluated genotypes showed a similar behavior and would be equally valid for the development of bioproducts. The aqueous extracts stand out for the development of bioproducts of low production cost, taking advantage of the crop residues of the strawberry crop.

Liability of middleness revisited: The advantages for mid-sized competitors in renewable natural resource industries Cruz, Alfonso; Reyes, Tomas; Vassolo, Roberto Santiago Size is an important antecedent of firm survival, and several studies theoretically sustain and empirically support a 'liability of middleness'. Indeed, it is widely believed that companies should act strategically to either become large or remain small and occupy a niche position, because mid-sized firms face the strongest market selection pressures. This study challenges that logic in renewable natural resource industries. Measuring size as product-line scale and firm-level portfolio breadth, we argue that in industries characterized by cost competition, the lack of product differentiation, large capital investments, and sharp price oscillation, scale and breadth have a curvilinear effect on survival that favors mid-sized firms rather than penalizing them. An empirical analysis of the US pulp and paper (P&P) industry over the period 1970-2000 strongly supports our arguments. This study is particularly relevant for emerging economies, in which natural resource industries represent an important portion of the total economic activity.

Artificial pancreas: the Argentine experience Colmegna, Patricio Hernán; Garelli, Fabricio; Fushimi, Emilia; Moscoso Vásquez, Hilda Marcela; Rosales, Nicolás; García Violini, Diego Demián; de Battista, Hernán; Sanchez Peña, Ricardo Salvador The objective of this work is to present a brief review on the international Artificial Pancreas project. In addition, the local project that led to the first Latin American clinical trials with an Artificial Pancreas will be described. These trials were performed in Buenos Aires during 2016 and 2017. The last trial used an algorithm developed in Argentina and defined as the ARG (Automatic Regulation of Glucose). This procedure and its in silico and clinical results will also be presented in this paper.

Cruces posibles y necesarios entre Geografía y la Educación Sexual Integral Moreno, Magdalena En el presente trabajo se proponen reflexiones acerca de la enseñanza de la Geografía desde una perspectiva de género. En un comienzo se presenta una breve introducción a la Ley de Educación Sexual Integral (ESI) y al rol que cumple la escuela en relación a ella. Luego, se realiza un recorrido histórico sobre los principales desarrollos de la Geografía feminista y, para continuar, se muestra el estado actual de la implementación de la ESI en la enseñanza de la Geografía…

Deslizamientos asociados a la degradación del permafrost: evidencias geomorfológicas en el pasado y presente en los Andes Centrales (31º-34ºS); Landslides associated with permafrost degradation: past and present geomorphological evidences in the Central Andes (31º-34ºs) Moreiras, Stella Maris; Jeanneret, Pilar; Lauro, Carolina; Vergara Dal Pont, Iván Pablo; Correas Gonzalez, Mariana; Junquera Torrado, Sebastian Este trabajo presenta evidencias de la incidencia del ascenso de la temperatura en la degradación o fusión del permafrost y su asociación con descargas de flujos de detritos en la región andina (30º-32ºS). Este resultado permite enfatizar la relación entre los colapsos de laderas y la temperatura permitiendo vincular la inestabilidad de las laderas en los Andes Centrales a condiciones ambientales en el pasado. Numerosos deslizamientos han sido vinculados a periodos interglaciares con escasos registros paleoclimáticos locales. Estos resultados además ponen en evidencia la necesidad de abordar este tipo de estudios a fin de reducir la vulnerabilidad de las comunidades andinas y atender medidas preventivas que disminuyan el evidente riesgo asociado en el contexto del calentamiento global.; This paper reveals evidences of permafrost degradation or fusion due to the temperature increase and its association with discharges of violent debris flow in the Central Andes region (30º-32ºS). This result emphasizes the relationship between slope collapses and temperature allowing to link the slopes instability in the Central Andes to paleo-environmental conditions. Several landslides have been linked to interglacial periods with few local paleoclimatic records. These results also highlight the need to undertake this type of studies in order to reduce the vulnerability of the Andean communities and implement preventive measures to reduce the evident associated risk in the context of global warming.