Evolution of the electronic structure during the epitaxial growth of Au on Pt(100) Bengió, Silvina; Walczak, Łukasz; Vobornik, Ivana; Segovia, Pilar; Michel, Enrique G. We report an angle-resolved photoemission study of the electronic structure of Au layers grown epitaxially on Pt(100) in the coverage range 1-10 monolayers (ML). Our results include an analysis of the electronic band structure and the Fermi surface, combined with structural information from low-energy electron diffraction. The Au films grow epitaxially with a (1 × 1) pattern up to 4-5 ML. We monitor the electronic band structure near the surface X¯-point vs. Au coverage. In the 1-3 ML range we observe interface electronic states related to the formation of a Au-Pt alloy in this coverage range. Starting at 2-3 ML coverage, we identify quantum well states from the incipient Au sp band, which converge into a bulk like Au sp band near 6 ML. After 5-6 ML, a (1 × 7) pattern is observed, due to the formation of a surface reconstruction in the epitaxial Au film with a topmost hexagonal layer, as in the reconstruction of bulk Au(100). We identify specific electronic states of quasi-one-dimensional character coming from the corrugated hexagonal layer. We obtain a complete picture and understanding of the electronic structure of Au/Pt(100), including sp Au band formation, hybridization and electronic confinement, and with implications in the understanding of the distinct electronic behavior of Au layers and particles in the nm size range.

Algunas relaciones entre el holismo de la confirmación y el holismo semántico:Estudio de caso; Some Relations between the Confirmation Holism and Semantic Holism: A Case Study Ginnobili, Santiago La tesis del holismo de la confirmación aparece por primera vez presentada de manera explícita y extensa en los escritos de Duhem. Años después, es defendida por Quine, pero no en base a la discusión de teorías científicas particulares, sino en relación con su posición semántica. Desde entonces las relaciones entre el holismo semántico y el holismo de la contrastación han sido discutidas, aunque generalmente de un modo algo despegado del análisis de teorías específicas y sus relaciones. Pretendo mostrar a partir del análisis de un caso, el de las relaciones entre la genética de poblaciones y la teoría de la selección natural, un sentido en el que el holismo de la confirmación puede ser derivado del holismo semántico.; The thesis of the confirmation holism appears for the first time explicitly and extensively in the writings of Duhem. Years later, it is defended by Quine, but not based on the discussion of particular scientific theories, but in relation to its semantic position. Since then, the relations between semantic holism and confirmation holism have been discussed, although generally somewhat detached from the analysis of specific theories and their relations. I intend to show from the analysis of a case, that of the relations between population genetics and the theory of natural selection, a sense in which the holism of confirmation can be derived from semantic holism.

Ca(II) and Ce(III) homogeneous alginate hydrogels from parent alginic acid precursor: a structural study Sonego, Juan Manuel; Santagapita, Patricio Roman; Perullini, Ana Mercedes; Jobbágy, Matías Alginate hydrogels are suitable for the encapsulation of biomolecules and microorganisms for the building of bioactive materials. Several alternatives to the conventional alginate formulation are being studied for a broad range of biotechnological applications; among them the crosslinking of alginate by lanthanide cations, Ln(III), envisages expanded biomedical applications. The performance of these functional materials is highly related to the microstructure of the alginate matrix, which in turn is affected by the conditions of synthesis. In particular, when a diffusing gradient of the crosslinking cation is involved, microstructure inhomogeneities are expected at the macroscopic level. Here we discuss the subtle differences in the microstructure, as assessed by SAXS (Small Angle X-ray Scattering), established in the direction of the gradient of diffusion of Ca(II) or Ce(III).

Formation of volatile compounds, peptidolysis and carbohydrate fermentation by mesophilic lactobacilli and streptoccocci cultures in a cheese extract Peralta, Guillermo Hugo; Wolf, Irma Veronica; Perotti, Maria Cristina; Bergamini, Carina Viviana; Hynes, Erica Rut Many studies about influence of Lactococcus lactis on cheese flavour have been reported, while the impact of mesophilic lactobacilli and Streptococcus thermophilus, either as single or mixed cultures, have been less studied. The ability of Lactobacillus paracasei 90, Lb. casei 72 (INLAIN collection) and Streptococcus thermophilus 2 (commercial strain) to produce flavour-related biochemical changes, as single or mixed (lactobacilli + streptococci) cultures, was assessed in a cheese model. These three strains, with different activities of glutamate dehydrogenase (GDH) and aminotransferases (AT), were incubated (14d/37 ºC) alone or in mixed cultures in a cheese model consisting of a sterile extract of a fresh cheese. Mesophilic lactobacilli showed fermentation of carbohydrates, an increase of peptidolysis and production of volatile compounds that were correlated with their AT activities. In addition, thesestrains also produced completely different profiles of the amino acceptor compounds: pyruvate and α-ketoglutarate. S. thermophilus 2 increased the level of α ketoglutarate due to its high GDH activity, but its ontribution to flavour compound production was negligible; Virtually no small additional hanges existed when S. thermophilus 2 was mixed with the lactobacilli. Biochemical changes leading to flavour formation were mainly due to the activity of lactobacilli. Our results suggest hat the AT profile and the peptidolytic activity of each strain influenced the volatilome of the extracts during incubation. So, both lactobacilli strains could be used as adjunct cultures in cheeses to increase/diversify the flavour, but more studies are needed to deepen the knowledge about the potential of S. thermophilus 2 for the production of flavour compounds.

A new algorithm for epilepsy seizure onset detection and spread estimation from EEG signals Antonio Quintero, Rincón; Pereyra, Marcelo Fabián; D'Giano, Carlos; Batatia, Hadj; Risk, Marcelo Appropriate diagnosis and treatment of epilepsy is a main public health issue. Patients suffering from this disease often exhibit different physical characterizations, which result from the synchronous and excessive discharge of a group of neurons in the cerebral cortex. Extracting this information using EEG signals is an important problem in biomedical signal processing. In this work we propose a new algorithm for seizure onset detection and spread estimation in epilepsy patients. The algorithm is based on a multilevel 1-D wavelet decomposition that captures the physiological brain frequency signals coupled with a generalized gaussian model. Preliminary experiments with signals from 30 epilepsy crisis and 11 subjects, suggest that the proposed methodology is a powerful tool for detecting the onset of epilepsy seizures with his spread across the brain.

El Sudeste de Asia como emergente en el horizonte sudamericano Rubiolo, María Florencia Los vínculos del Sudeste de Asía con América del Sur se dinamizaron a partir deprincipios de los noventa, de la mano del fin de la Guerra Fría, del boom delcrecimiento económico de las principales economías del Sudeste de Asia ?omilagros económicos, como fueron denominadas por el informe del Banco Mundialde 1993-, y de la aplicación en los países de América del Sur de medidaseconómicas de apertura y liberalización comercial que favoreció la búsqueda denuevos espacios de inserción para la exportación de materias primas y derivados.Fue entre la década de mediados de los ochenta a mediados de los noventa que seprodujo el mayor crecimiento económico de los países como Singapur, Tailandia yMalasia. Mientras el primerotuvo un crecimiento promedio de 8.5 entre 1986 y1997, en el mismo periodo el PBI de Tailandia creció 8.3% anual, y el de Malasia8.25% anual (World Bank,2010). Este ritmo de crecimiento despertó el interés deestadistasalrededor del globo, tanto como potenciales socios comerciales comomodelos de desarrollo económico a emular.

Un mundo rural en transición. Población, actividades y migraciones en la campaña de Buenos Aires según el Primer Censo Nacional de Población de la República Argentina (1869); A Rural World in Transition. The Countryside of Buenos Aires according to the First National Population Census of the Argentinian Republic (1869) Conente, Claudia; Barcos, Maria Fernanda La campaña de Buenos Aires había recibido desde fines del siglo XVIII importantes corrientes migratorias interprovinciales que fueron progresivamente desplazadas por las provenientes de Europa. Si bien existen trabajos basados en los resultados generales, se ha abordado muy poco el estudio de la población a partir de las cédulas censales en sí mismas. Nos proponemos aquí observar la estructura de la población de la campaña bonaerense durante estos primeros tiempos de la inmigración masiva. Aplicando una perspectiva comparada entre tres pueblos (San Antonio de Areco en la zona norte, Mercedes en el centro y San Vicente en el sur) prestaremos particular atención a la composición de la población, su origen, las actividades productivas y el proceso de urbanización. Se analizan igualmente las pautas de destino y localización geográfica de los extranjeros en los pueblos rurales, las ocupaciones preferidas y la eventual diversificación de actividades en función de las nacionalidades.; Since the late 18th century, the countryside of Buenos Aires had received considerable waves of migrants from other provinces though they were progressively superseded by those that originated in Europe. Even if there exist studies based on the general results of the first national census, rarely have the handwritten records been used to examine a given population. We therefore propose to analyze in this article the population that inhabited the countryside of Buenos Aires during the first phase of massive immigration to the area. By making use of a perspective that compares three villages: San Antonio de Areco in the northern zone, Mercedes in the center, and San Vicente in the south. We will pay particular attention to the composition of the population, its origins, the productive activities that its inhabitants carried out and the process of urbanization. The geographical location of the foreigners in the rural villages will also be analyzed, as well as the occupations they preferred to do and how their professional activities were eventually diversified based on respective nationalities.

Os movimentos socioterritoriais: entre as classes e os movimentos populares; The socioterritorial movements: between classes and popular movements; Los movimientos socioterritoriales: entre las clases y los movimientos populares Vasquez Cardona, David; Sobreiro Filho, José Realizamos uma reflexão sobre os movimentos socioterritoriais com a finalidade de resgatar e destacar a importância da leitura sobre as classes sociais, os movimentos populares e o território, tanto para compreendê-los com maior profundidade quanto para discutir e propor ações estratégicas emancipatórias na atualidade. Mediante a dinâmica de conflitos engendrados pelos imperativos da sociedade do capital, consideramos a leitura gramsciana sobre a categorização das classes subalternas um ponto de partida imprescindível para realizar a análise sobre os movimentos populares, em sua luta pela hegemonia do Estado na atualidade. Somada às concepções dos movimentos populares, apresentamos uma abordagem socioterritorial, a partir do conceito de território da geografia para enriquecer a leitura sobre o potencial das ações emancipatórias dos movimentos diante da voraz disputa territorial gerada pela lógica capitalista e potencializada pela globalização.; We conducted a reflection on the socio-territorial movements with the purpose of rescue and emphasize the importance of reading about the social classes, the popular movements and the territory, both in order to understand them in greater depth as to discuss and propose actions and strategies in the emancipatory struggles taking place currently. Through the dynamics of conflicts engendered by the imperatives of the society of capital, we believe the reading gramscian on categorization of the subaltern classes an indispensable starting point to perform the analysis on the popular movements, in their struggle for the hegemony of the State at the present time. In addition to notions of popular movements, we present an approach socioterritorial, based on the concept of territory of geography to enrich the reading on the potential of the emancipatory actions of the movements before the voracious territorial dispute generated by the capitalist logic and potentiated by globalization.; Realizamos una reflexión sobre los movimientos socioterritoriales con la finalidad de rescatar y destacar la importancia de la lectura sobre las clases sociales, los movimientos populares y el territorio, tanto para comprenderlos con mayor profundidad como para discutir y proponer acciones y estrategias emancipatorias en la actualidad. Mediante la dinámica de conflictos engendrados por los imperativos de la sociedad del capital, consideramos la lectura gramsciana sobre la categorización de las clases subalternas un punto de partida imprescindible para realizar el análisis sobre los movimientos populares, en su lucha por la hegemonía del Estado en la actualidad. Sumado a las concepciones de los movimientos populares, presentamos un abordaje socioterritorial, a partir del concepto de territorio de la geografía para enriquecer la lectura sobre el potencial de las acciones emancipatorias de los movimientos ante la voraz disputa territorial generada por la lógica capitalista y potencializada por la globalización.

Ordenanzas municipales, autoridad policial y trabajo femenino: la prostitución clandestina en Buenos Aires, 1870-1880; Municipal Ordinances, Police Authority, and Women’s Work: The Case of Clandestine Prostitution in Buenos Aires, 1870-1880; Ordonnances municipales, autorité policière et travail féminin: la prostitution clandestine à Buenos Aires, 1870-1880 Schettini Pereira, Cristiana Este artículo aborda los años posteriores a la aprobación de la ordenanza de 1875, que reglamentó las casas de prostitución, para examinar su impacto en los sentidos morales atribuidos a ciertos lugares de ocio y sociabilidad masculina que dependían del trabajo femenino. Se trata de un periodo marcado por la aprobación de inéditos reglamentos sobre viviendas y lugares de sociabilidad en el marco de la construcción del poder municipal. En especial, argumenta que la noción de ?prostitución clandestina? permite examinar la construcción cotidiana de la autoridad, los ámbitos municipales como escenarios de disputa entre derechos y los arreglos laborales entablados en estos lugares.; This article examines the years following the 1875 municipal ordinance that established regulations for houses of prostitution. It analyses the impact of this ordinance on the moral meanings of these establishments devoted to leisure and male sociability, which depended on women’s labour. This period of Buenos Aires’ history was shaped by the enactment of novel sanitary and municipal measures, in a context characterized by the construction of municipal authority. The article argues that the notion of “clandestine prostitution” can be used as a clue to examine the daily construction of local authority, the dispute of rights in the municipal setting, and labour relations in such establishments.; Cet article examine l’impact de l’ordonnance de 1875 sur la réglementation des maisons closes, durant les années qui suivent son approbation, sur les sens moraux attribués à certains lieux de plaisir et de sociabilité masculine qui dépendaient du travail féminin. Il s’agit d’une période marquée par l’approbation de règlements inédits en matière d’habitat et de lieux de sociabilité dans le cadre de la construction du pouvoir municipal. En particulier, l’article avance que la notion de “prostitution clandestine” permet d’examiner la construction quotidienne de l’autorité, les cadres municipaux comme lieux de disputes entre droits et les arrangements en matière de travail conclus dans ces lieux. Mots clé: Buenos Aires, 1870-1880, municipalité,

Layered vanadyl(IV) nitroprusside: Magnetic interaction through a network of hydrogen bonds Gil, Diego Mauricio; Osiry, Hernádez; Pomirio, Fernando; Varetti, Eduardo Lelio; Carbonio, Raul Ernesto; Alejandro, R. R.; Ben Altabef, Aída; Reguera, Edilso The hydrogen bond and π-π stacking are two non-covalent interactions able to support cooperative magnetic ordering between paramagnetic centers. This contribution reports the crystal structure and related magnetic properties for VO[Fe(CN)5NO]·2H2O, which has a layered structure. This solid crystallizes with an orthorhombic unit cell, in the Pna21 space group, with cell parameters a=14.1804(2), b=10.4935(1), c=7.1722(8) Å and four molecules per unit cell (Z=4). Its crystal structure was solved and refined from powder X-ray diffraction data. Neighboring layers remain linked through a network of hydrogen bonds involving a water molecule coordinated to the axial position for the V atom and the unbridged axial NO and CN ligands. An uncoordinated water molecule is found forming a triple bridge between these last two ligands and the coordinated water molecule. The magnetic measurements, recorded down to 2 K, shows a ferromagnetic interaction between V atoms located at neighboring layers, with a Curie-Weiss constant of 3.14 K. Such ferromagnetic behavior was interpreted as resulting from a superexchange interaction through the network of strong OH····OH2O, OH····NCN, and OH····ONO hydrogen bonds that connects neighboring layers. The interaction within the layer must be of antiferromagnetic nature and it was detected close to 2 K.

Algunos problemas en torno a la noción de sánscrito clásico Müller, Gabriela Fernanda; Orqueda, Verónica En este trabajo reflexionamos sobre algunos problemas en torno a la noción de sánscrito en general y de sánscrito clásico en particular. Partiendo de una serie de distinciones, discutimos cuatro caracterizaciones diferentes, pero relacionadas entre sí, del término “sánscrito”: (a) en cuanto lengua clásica; (b) en cuanto variedad lingüística natural; (c) en cuanto lengua en la que está compuesto el canon literario de la India antigua; y (d) en tanto lengua arti+cial. Estas caracterizaciones, junto con los problemas asociados a ellas, llevan directamente a considerar los desafíos que entraña la enseñanza de esta lengua, así como las posibles líneas de investigación que deben ser profundizadas.; This paper addresses some problems related to the question about what is Sanskrit in general, and what is Classical Sanskrit in particular. After o

A nonlinear aggregation type classifier Cholaquidis, Alejandro; Fraiman, Jacob Ricardo; Kalemkerian, Juan; Llop Orzan, Pamela Nerina We introduce a nonlinear aggregation type classifier for functional data defined on a separable and complete metric space. The new rule is built up from a collection of M arbitrary training classifiers. If the classifiers are consistent, then so is the aggregation rule. Moreover, asymptotically the aggregation rule behaves as well as the best of the M classifiers. The results of a small simulation are reported both, for high dimensional and functional data, and a real data example is analyzed.

Soil physical quality and soybean yield as affected by chiseling and subsoiling of a no-till soil Lozano, Luis Alberto; Soracco, Carlos Germán; Villarreal, Rafael; Ressia, Juan Manuel; Sarli, Guillermo Oliverio; Filgueira, Roberto Raul The concept of soil physical quality (SPQ) is currently under discussion, and an agreement about which soil physical properties should be included in the SPQ characterization has not been reached. The objectives of this study were to evaluate the ability of SPQ indicators based on static and dynamic soil properties to assess the effects of two loosening treatments (chisel plowing to 0.20 m [ChT] and subsoiling to 0.35 m [DL]) on a soil under NT and to compare the performance of static- and dynamic-based SPQ indicators to define soil proper soil conditions for soybean yield. Soil sampling and field determinations were carried out after crop harvest. Soil water retention curve was determined using a tension table, and field infiltration was measured using a tension disc infiltrometer. Most dynamic SPQ indicators (field saturated hydraulic conductivity, K0, effective macroporosity, εma, total connectivity and macroporosity indexes [CwTP and Cwmac]) were affected by the studied treatments, and were greater for DL compared to NT and ChT (K0 values were 2.17, 2.55, and 4.37 cm h-1 for NT, ChT, and DL, respectively). However, static SPQ indicators (calculated from the water retention curve) were not capable of distinguishing effects among treatments. Crop yield was significantly lower for the DL treatment (NT: 2,400 kg ha-1; ChT: 2,358 kg ha-1; and DL: 2,105 kg ha1), in agreement with significantly higher values of the dynamic SPQ indicators, K0, εma, CwTP, and Cwmac, in this treatment. The results support the idea that SPQ indicators based on static properties are not capable of distinguishing tillage effects and predicting crop yield, whereas dynamic SPQ indicators are useful for distinguishing tillage effects and can explain differences in crop yield when used together with information on weather conditions. However, future studies, monitoring years with different weather conditions, would be useful for increasing knowledge on this topic.

Development of a mechanism and an accurate and simple mathematical model for the description of drug release: Application to a relevant example of acetazolamide-controlled release from a bio-inspired elastin-based hydrogel Fernández Colino, A.; Bermudez, Jose Maria; Arias, F. J.; Quinteros, Daniela Alejandra; Gonzo, Elio Emilio Transversality between mathematical modeling, pharmacology, and materials science is essential in order to achieve controlled-release systems with advanced properties. In this regard, the area of biomaterials provides a platform for the development of depots that are able to achieve controlled release of a drug, whereas pharmacology strives to find new therapeutic molecules and mathematical models have a connecting function, providing a rational understanding by modeling the parameters that influence the release observed. Herein we present a mechanism which, based on reasonable assumptions, explains the experimental data obtained very well. In addition, we have developed a simple and accurate "lumped" kinetics model to correctly fit the experimentally observed drug-release behavior. This lumped model allows us to have simple analytic solutions for the mass and rate of drug release as a function of time without limitations of time or mass of drug released, which represents an important step-forward in the area of in vitro drug delivery when compared to the current state of the art in mathematical modeling. As an example, we applied the mechanism and model to the release data for acetazolamide from a recombinant polymer. Both materials were selected because of a need to develop a suitable ophthalmic formulation for the treatment of glaucoma. The in vitro release model proposed herein provides a valuable predictive tool for ensuring product performance and batch-to-batch reproducibility, thus paving the way for the development of further pharmaceutical devices.

Reproductive biology of the southern thorny skate Amblyraja doellojuradoi (Chondrichthyes, Rajidae) Delpiani, Gabriela Elina The total lengths (LT) of 193 males (209-556mm) and 130 females (275-515mm) of Amblyraja doellojuradoi, a commercial by-catch species on the Argentinean continental shelf, which are increasingly retained, were analysed. No sexual dimorphism was observed in the LT at which 50% of individuals were sexually mature; males matured at 448mm and females at 411mm, c. 80 and 82% of maximum LT. The hepato-somatic index was similar among sexes, but significantly different between maturity stages, being lower in mature than immature specimens. Males had no seasonal difference in the hepato-somatic index and females had the lowest index in autumn. The gonado-somatic index was lower in males than in females and significantly higher in mature than immature specimens of both sexes. Males had the highest index in autumn and females had no seasonal difference. Collectively, these results would indicate that A. doellojuradoi breeds in autumn.

Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments; Unterschiede in der Brutpflege beim Brillentyrann steht in Verbindung mit einer erhöhten Nest-Prädationsrate in fragmentiertem Grasland Pretelli, Matías Guillermo; Isacch, Juan Pablo; Cardoni, Daniel Augusto Predation risk on birds is often an important source of natural selection that shapes parental care and may promote behavioral changes. Parents can often estimate certain risks and adjust their behavior to reduce the likelihood of nest predation. The fragmentation of habitats is one of the main consequences of loss of habitats, and in general, for birds breeding in smaller patches, their daily nest-survival rate is lower due to increased nest predation. Since nest survival is an estimate of predation risk in the environment, we evaluated the daily survival rate (DSR) for nests of spectacled tyrants (Hymenops perspicillatus) and parental care behavior on fragmented and unfragmented grasslands. We conducted nest searching and monitoring during the 2012-2013 breeding season in small patches and in a continuous patch of grassland. In addition, parental activity was recorded using video monitoring. We found a lower DSR for the spectacled tyrant in fragmented grasslands, associated with increased nest predation risk; females showed a variation in parental care. This variation was evidenced by larger incubation bouts and lower visitation rate during the incubation period, and by a lower food delivery rate to nestlings, compensated by larger prey sizes. The results show that fragmentation not only reduces the fitness of individuals and impacts adversely on population, but individuals are also subjected to a strong selection pressure, and their reproductive success may depend to some extent on the ability of parents to estimate at least certain predation risk and adjust their behavior in this regard.

Photochemical study of Eosin-Y with PAMAM dendrimers in aqueous solution Arbeloa, Ernesto Maximiliano; Previtali, Carlos Mario; Bertolotti, Sonia Graciela A steady-state and time-resolved study of the xanthene dye Eosin-Y (Eos) in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers in alkaline aqueous solution is presented. Stationary photolysis experiments in deaerated and air equilibrated solutions were carried out. The absorption spectra of the photolyzed solutions in the absence of oxygen showed the formation of several intermediate species. With the aid of laser flash photolysis technique (LFP) those transients could be ascribed to semireduced and partially debrominated species of Eos. The triplet quenching rate-constant (3kq) and radical quantum yields (ΦR) were determined by LFP. In the presence of PAMAM, the triplet lifetime of Eos is greatly decreased and the data fitted to a Stern–Volmer treatment. These experiments indicated that the electron transfer from dendrimers to Eos is a highly favored process. Based on the results found in this work, we concluded that Eos/PAMAM couple might act as a promising photoinitiator of vinyl polymerization with low ecological impact.

Palynotaphofacies analysis applied to Jurassic marine deposits, Neuquén Basin, Argentina Martinez, Marcelo Adrian; Olivera, Daniela Elizabeth; Zavala, Carlos Alberto; Quattrocchio, Mirta Elena Taphonomic analysis was performed on palynological samples of marine successions from the Cuyo Group of the Neuquén Basin. The group comprises the Los Molles and Lajas Formations (Middle Jurassic) and represents the first major marine depositional episode after the configuration of the basin. A total of 21 outcrop samples from five sections, located in the central-western part of the basin, were analyzed. The palynological counts of each sample were carried out taking into account the preservation state of the palynomorphs, which was mainly influenced by two parameters: their intrinsic properties and the environmental depositional conditions. Four main deterioration types (corrosion, degradation, mechanical damage, and concealment by authigenic minerals) and their six combinations were identified. The growth of pyrite crystals within the palynomorphs was strongly influenced by the exine structure, being dominant in bisaccate pollen grains. Mechanical damage appears to be the most important deterioration type, reflecting the highly dynamic conditions of shelfal marine environments. The term Palynotaphofacies (Pt) was proposed to characterize a sedimentary rock yielding palynological associations with distinctive preservational features. Three palynotaphofacies have been recognized: Pt-1 (tidal-influenced environments) is characterized by the highest percentage of deteriorated forms, reflecting either intermittent exposure to weathering or intense reworking. Pt-2 shows the highest percentage of well-preserved palynomorphs associated with rapid burial due to a high sedimentation rate and it comes from the delta-front facies of fluvial-dominated deltas. Finally, Pt-3 was identified in samples of prodelta hyperpycnites with a wide predominance of terrigenous components and it is characterized by the coexistence of well-preserved and deteriorated palynomorphs.

El uso de testimonios en la indagación sobre violencias institucionales y de género; The use of testimony in the inquiry on institutional violence and gender Colanzi, Irma Cecilia El presente artículo propone una problematización de las categorías conceptuales de las violencias y los testimonios de las mujeres que denuncian las mismas. Se analiza la categoría de testimonio desde las contribuciones de la historia reciente y el feminismo, con el objetivo de establecer un paralelismo entre las violencias sistemáticas como han sido el genocidio del pueblo judío o el exterminio en los centros clandestinos de detención en la dictadura cívico militar de nuestro país. El análisis que se efectúa entonces en relación con los testimonios de las mujeres en situación de violencias se orienta a revalorizar las voces de las mujeres que interpelan el tejido social en la medida en que problematizan una problemática estructural, como es la subordinación de las mujeres en un contexto de violencia, y se posicionan denunciando una violencia a sus derechos humanos, una violencia al ejercicio de su ciudadanía. Se advierte la necesidad de seguir consolidando nuevas discusiones y herramientas en función de la complejidad de la problemática, y la dinámica ágil que adquiere tanto por las prácticas sociales, como por los recursos judiciales y técnicos que exigen.; This article proposes a problematization of the conceptual categories of violence and testimonies of women who report them. The category of testimony is analyzed from the contributions of recent history and feminism, with the aim of establishing a parallel between the systematic violence as were the genocide of the Jewish people or extermination in clandestine detention centers in the civil-military dictatorship of our country. The analysis is then carried out in relation to the testimony of women in situations of violence is aimed at revaluing women's voices that challenge the social fabric to the extent that problematize a structural problem, as is the subordination of women in a context of violence, and position denouncing violence of their human rights, violence to exercise their citizenship. The need to further consolidate further discussions and tools depending on the complexity of the problem, and agile dynamic that acquires both social practices, such as judicial and technical resources required warns.

Sociabilidades, redes y circulación de saberes en la conformación de un “ámbito psi” en la Argentina de entreguerras (Santa Fe, 1919-1943); Sociabilities, networks and the circulation of knowledges in the creation of a “psy scope” in Argentina during the inter-war period (Santa Fe, 1919-1943) Allevi, José Ignacio El artículo presenta los avances de una investigación referida a la construcción de un campo científico psi en Argentina durante el período de entreguerras, con foco en espacios subnacionales. A partir de l920, el movimiento de la higiene mental, en sus diferentes expresiones disciplinares, adquirió una notable presencia en la esfera pública, en la enseñanza universitaria y – tardíamente – en las políticas de salud, en un movimiento expansivo que derivó en la conformación de un campo autónomo y con lógicas propias. Sostenemos que la constitución de dicho “campo psi” – en tanto inexistente – fue posible mayormente por la fuerza de redes de sociabilidad que facilitaron la gestión de recursos y espacios institucionales de poder que permitieron autonomizar y constituir el campo.; This article presents the findings of a research study on the construction of a psy scientific field in Argentina during the inter-war period, with a focus on subnational spaces. After 1920, the mental hygiene movement, in its different disciplinary manifestations, became notable in the public sphere, in university education and – belatedly – in healthcare policies, in an expansion that led to the creation of an autonomous field with its own logic. I argue that the creation of this “psy field” – while it was as yet inexistent – was largely due to the strength of sociability networks that facilitated the management of resources and institutional spaces of power, making it possible for the field to become independent and established.