Defusing Master Narratives: Decolonial, Insurgent, Gentle Moves in a Con-Text of Teacher Education and Educational Research Yedaide, Maria Marta; Porta Vazquez, Luis Gabriel This article intends to share a very particular perspective on teacher education and educational research while asserting the inevitability, inescapability, of such local epistemological bias. It discusses the hermeneutic, narrative, decolonial and performative turns and their interplay with the geocultural and political conditions in a con-text which is acknowledged as highly productive (and strongly conditioning) of social meaning. On the basis of teaching and research experience, some insurgent, gentle moves have been designed as ethico-onto-epistemological gestures to experiment on concrete possibilities of fluidity and instability for master narratives. Far from naïvely believing in the “fall”, “end” or “breaking down” of these narratives, defusing them involves instead a positioning on language, narrative and discourse capable of devising provisional and changing patterns of contingent intelligibility which allow for greater exercise of civic sovereignty. Critical, decolonial and queer pedagogies actually constitute the core beliefs which—subjected to the constraints of contingency—are asked to perform this double role of both structuring and shattering grand narratives. It must be noted that this positioning has implied an explicit rejection of the use of passive voice and the (impersonalized) third person in writing this article. The choice of the pronoun “we” constitutes in itself a political gesture –an exercise of rhetoric prerogative, in the terms Segato (2019), Walsh (2011), and Yedaide (2017) propose—. In addition, we affiliate to the thesis which claims that separating the personal and the political constitutes a modern technology: a culture of the non-culture (Haraway, 1997), that is to say, a maneuver that conceals the necessary political bias present in all social products, even and especially when these are self-presented as merely technical. As to our use of English in writing—though apparently contradictory with the epistemic authority we defend—it must be read simply as a gesture manifesting willingness to engage in productive dialogue with peoples who do not speak Spanish. The choice of splitting the word “context” as “con-text” aims at raising awareness regarding the decisive influence that any setting exercises in meaning-making (a site should not be taken as merely ornamental or as landscape/ background but rather as an agent, productive in the construction of meaning, we argue.

Dynamics of chiral solitons driven by polarized currents in monoaxial helimagnets Laliena, Victor; Bustingorry, Sebastián; Campo, Javier Chiral solitons are one dimensional localized magnetic structures that are metastable in some ferromagnetic systems with Dzyaloshinskii–Moriya interactions and/or uniaxial magnetic anisotropy. Though topological textures in general provide a very interesting playground for new spintronics phenomena, how to properly create and control single chiral solitons is still unclear. We show here that chiral solitons in monoaxial helimagnets, characterized by a uniaxial Dzyaloshinskii–Moriya interaction, can be stabilized with external magnetic fields. Once created, the soliton moves steadily in response to a polarized electric current, provided the induced spin-transfer torque has a dissipative (nonadiabatic) component. The structure of the soliton depends on the applied current density in such a way that steady motion exists only if the applied current density is lower than a critical value, beyond which the soliton is no longer stable.

Gabriel Carrasco visita Asunción. Representaciones del pasado y del presente paraguayo en las cartas de un estadístico argentino (1888); Gabriel Carrasco visits Asunción. Representations of the past and present paraguayan in the letters of an argentine statistical (1888) Micheletti, María Gabriela La década de 1880 significó en las naciones del Cono Sur un esfuerzo censal y de inventariado y recolección de objetos, cuyos resultados fueron mostrados en las Exposiciones universales de Barcelona y París. Con relación a ese fin, el experto estadístico Gabriel Carrasco viajó en 1888 por los territorios del noreste argentino, y llegó a Paraguay. Las observaciones que realizó durante su recorrida fueron puestas por escrito en forma de cartas, en las que vertió una serie de imágenes y representaciones sobre el pasado y el presente paraguayo. Este artículo se ocupa de estudiarlas, valiéndose de sus Cartas de viaje como fuentes principales para el análisis. El objetivo es contribuir a explicitar los vínculos entre saberes expertos, observación de la realidad, historia y memoria, y resaltar el carácter performativo y programático presente en el discurso de este estadístico decimonónico.; In the nations of the Southern Cone, the 1880s meant a census effort and inventories and collection of objects, the results of which were shown at the Universal Exhibitions at Barcelona and Paris. In relation to this, the statistical expert Gabriel Carrasco traveled in 1888 through the territories of northeast Argentina and arrived in Paraguay. The observations he made during his tour were put in writing in the form of letters, in which he poured a series of images and representations of the Paraguayan past and present. This article deals with studying them, using his Cartas de viaje as the main sources for analysis. The objective is to contribute to making explicit the links between expert knowledge, observation of reality, history and memory, and to highlight the performative and programmatic character present in the discourse of this nineteenth-century statistician.

Con los ojos puestos en ese continente con forma de arpa: Arquetipos brasileños, búsqueda escrituraria y ristra de experiencias en un relato del intelectual santafesino Alcides Greca (1889-1956); With eyes on that harp-shaped continent: Brazilian archetypes, writing search, and a bunch of experiences in a narrative of the santafesino intellectual Alcides Greca (1889-1956) Antequera, María Florencia La presente comunicación explora la intervención cultural del intelectual santafesino Alcides Greca (1889-1956) que tuvo lugar en 1948 por las tierras del Brasil. Proponemos focalizar, principalmente, en la singular perspectiva que Greca inscribe en Bahianos y bandeirantes (1950), a partir de un catálogo de referencias sensibles (Ette, 2004), propio del viajero cultural (Aguilar y Siskind, 2002). Entendemos que este relato resulta un vehículo escriturario singular para traducir nuevas experiencias sociales (Antequera, 2018) cuyo tópico de interés refulgente es la ciudad. La comunicación consta de tres partes: en la primera, discurrimos en torno a los arquetipos y artefactos urbanos que Greca mensura; en la segunda, analizamos las marcas de escritura autobiográfica que coadyuvan en la búsqueda de una legitimación conjunta de proyecto y sujeto (Antelo, 1998). Por último, examinamos las credenciales que porta Greca en su viaje a Brasil, es decir, sus contribuciones en el campo del urbanismo y el derecho municipal y pasamos revista a los anfitriones que, pródigos en atenciones, lo acompañaron.; This article explores the cultural intervention of the santafesino intellectual Alcides Greca (1889- 1956), developed in 1948, in Brazil. Our work focuses mainly on the singular perspective that Greca implemented in Bahianos and bandeirantes (1950) as the starting point of a catalogue of sensitive references (Ette, 2004), typical of a cultural traveler (Aguilar, Siskind 2002). We believe that this narrative represents a scriptural vehicle which interprets new social experiences (Antequera, 2020a), and whose main topic is the city. This article consists of three parts: the first is a discussion on the urban archetypes and artifacts measured by Greca. The second is an analysis of the autobiographical writing traces that contribute to the search of a combined legitimation of project and subject (Antelo 1998). The third, finally, consists of both an exploration of the credential letters carried by Greca in his journey through Brazil –his contributions to urbanism and municipal law–, and a review of the generous hosts that accompanied him.

Articaine interaction with phospholipid bilayers Prates, Érica Teixeira; Rodrigues da Silva, Gustavo Henrique; Souza, Thais F.; Skaf, Munir S.; Pickholz, Mónica Andrea; de Paula, Eneida Local anesthetics promote analgesia by interacting with excitable membranes. Articaine (ATC) has a unique composition among local anesthetics as it possesses a thiophene instead of the typical phenyl ring. Aiming to characterize the interaction of neutral articaine (nATC) with phospholipid membranes, we have employed a synergistic approach of experimental and computational techniques. Fluorescence measurements supported nATC partitioning into the membranes, since its intrinsic fluorescence anisotropy increased from 0.03 in water to 0.29 in the presence of egg phosphatidylcholine (EPC) liposomes, and the fluorescence of AHBA, a probe that monitors the water-membrane interface, was quenched by nATC. 1H NMR experiments revealed changes in the chemical shifts of articaine and EPC hydrogens after partitioning, and shorter T1 values of nATC hydrogens when inserted into the EPC vesicles. Contacts of nATC and the phospholipid polar head group were inferred from 2D-NOE. Taken together, these results indicate a superficial insertion of the nATC molecules inside EPC bilayers. This conclusion was confirmed by molecular dynamics simulations, which allowed the identification of the key interactions underlying the preferential location of nATC in the bilayer. Contrary to what is often stated (that articaine is a high lipophilic local anesthetic agent) our results place ATC among the hydrophilic ones, such as lidocaine, prilocaine, and mepivacaine, for which the water/membrane interface is the preferred location.

Estrategias de institucionalización de los trabajadores de la economía popular y sus organizaciones: Revisitando la Ley de Emergencia Social (Argentina, 2016) Natalucci, Ana Laura; Mate, Ernesto Pablo El siguiente trabajo aborda la Ley de Emergencia Social (LES) a partir de una serie de interrogantes todavía abiertos, vinculados a la manera en que la LES es clave para avanzar en la institucionalización del sector de la economía popular, qué impacto tuvo en sus trabajadores y por qué se logró su sanción a diferencia de la ley de emergencia laboral. El objetivo de este artículo es analizar la LES como una estrategia de la Confederación de Trabajadores de la Economía Popular (CTEP) orientada a poner en el centro del debate la economía popular como problema público, reivindicar el rol de las organizaciones como entidades representativas del sector y lograr la implementación del Salario Social Complementario como un dispositivo para la creación de prácticas de bienestar. Se sigue en el artículo una metodología cualitativa a partir del análisis de documentos institucionales, entrevistas y observaciones participantes.; The following work addresses the Social Emergency Law (LES) based on a series of still open questions related to the way in which the LES allowed progress in the institutionalization of the popular economy sector, what impact it had on its workers and why its sanction was achieved unlike the labor emergency law. The objective of this article is to analyze the LES as a strategy of the Confederation of Workers of the Popular Economy (CTEP) aimed at putting the popular economy as a public problem at the center of the debate, claiming the role of organizations as representative entities of the sector and achieving the implementation of the Complementary Social Salary as a device for creating wellness practices. The article follows a qualitative methodology based on the analysis of institutional documents, interviews and participant observations.

El diseño institucional del Banco del Sur ¿un modelo superador a la banca multilateral de desarrollo?; The Banco del Sur Institutional Design: A Surpassing Model of Multilateral Development Bank? Molinari, Andrea; Patrucchi, Maria Leticia Los primeros años del siglo XXI mostraron un gran dinamismo en el mapa de actores financieros multilaterales, especialmente de iniciativas sureñas frente al debilitamiento de los actores financieros tradicionales. América del Sur formó parte de una vanguardia en esa agenda promoviendo, entre otras iniciativas, la creación de un nuevo banco regional de desarrollo: el Banco del Sur. Nuestro análisis caracteriza esa iniciativa describiendo y entendiendo sus limitaciones endógenas y exógenas que frenaron su puesta en marcha y poniendo énfasis en las características de su diseño, comparándolo luego tanto con los bancos consolidados que financian la región suramericana (BID y CAF) como con experiencias simultáneas que sí avanzaron (AIIB y NDB). Encontramos en su diseño una estructura de gobernanza más innovadora -sustentada en una legitimidad política que se fue debilitando en la región- pero que además convive con restricciones tradicionales del modelo financiero de este tipo de instituciones.; Over the first years of the 21st century, the map of multilateral financial actors has shown great dynamism, especially with southern initiatives in the face of the weakening of traditional financial actors. South America was part of a vanguard in this agenda by promoting, among other initiatives, the creation of a new regional development bank: the Banco del Sur. Our analysis characterizes this initiative by describing and recognizing its current endogenous and exogenous limitations that stopped its implementation and emphasizing its design features. We compare it with both the consolidated banks that finance the South American region (IDB and CAF) and simultaneous prospering experiences (AIIB and NDB). We find in the Banco del Sur design a more innovative governance structure based upon a weakening regional political legitimacy that, however, coexists with traditional restrictions of the financial model of this type of institutions.

TIC y gobierno electrónico: Cooperación entre Corea del Sur y América del Sur; ICT and e-government: Cooperation between South Korea and South America Bavoleo, Bárbara Inés Este trabajo aborda la estrategia de desarrollo de las industrias de tecnologías de información y comunicación de la República de Corea desde los planes gubernamentales — que deriva en su posicionamiento como uno de los países de vanguardia en términos de gobierno electrónico y que ubica al sector como central para el crecimiento de su economía—, así como la exportación de sistemas o componentes de gobierno electrónico —entendido en un rango amplio que incluye: asesoramiento, diseño, software, hardware, entre otros— a países latinoamericanos. Se sostiene, aquí, que la cooperación intergubernamental tiene el objetivo de facilitar el ingreso de empresas surcoreanas a los mercados de América Latina.; This paper addresses the development strategy of the information and communication technology industries of the Republic of Korea from the point of view of governmental policies —which derives in its position as one of the vanguard countries in terms of electronic government and which places the sector as central to the growth of its economy—, and also addresses the export of systems or components of electronic government —this understood within a wide range that includes: consultation, design, software, hardware, among others— to Latin American countries. It is argued here that intergovernmental cooperation aims to facilitate the entry of South Korean companies into Latin American markets.

Una pedagogización de los deportes: La figura de Benigno Rodríguez Jurado y sus políticas sobre cultura física y deportes; A sport pedagogization: Benigno Rodríguez Jurado’s public figure, policies and discourses on physical culture and sports Kopelovich, Pablo; Galak, Eduardo En la Argentina de la década de 1920 se produjo un proceso de escolarización de los deportes –esto es, su inclusión en los establecimientos educativos–, para posteriormente, con el desarrollo de la década de 1940, llevarse a cabo otro de pedagogización de los deportes. Con este posicionamiento teórico como trasfondo, en este escrito se indagan los discursos de una figura importante en este proceso, cuya trayectoria política y deportiva a la vez da cuenta de dicho pasaje hacia la pedagogización de los deportes: Benigno Rodríguez Jurado. Interesa especialmente analizar sus discursos en torno a la cultura física y los deportes, particularmente aquellos que realiza en su gestión como director del Departamento de Cultura Física de la Universidad Nacional de La Plata. En lo que respecta a su idea de cultura física, se observa que está vinculada a la búsqueda del mejoramiento de la salud, en línea con las concepciones que sobre este término se hacían en el contexto nacional y latinoamericano, a la vez que remite a ciertas ideas eugenésicas al referir al mejoramiento de las generaciones futuras. Por otra parte, se analizan los sentidos sobre lo deportivo, con cierta idealización de su práctica, con tono moralizante, encontrando ciertas tensiones entre el deporte escolar y el federado. De todo ello se desprende que, mientras fue director, Benigno Rodríguez Jurado desarrolló en el Departamento de Cultura Física, y a través de la enseñanza de la Educación Física en el Colegio Nacional y el Colegio Secundario de Señoritas, un laboratorio de ideas para una escolarización del deporte, es decir su inclusión curricular, y posteriormente, en la Dirección General de Educación Física y Cultura de la provincia de Buenos Aires, desde 1940, desplegó una pedagogización de los deportes.; In 1920s, in Argentina, was developed a schooling process of sports –that is, its inclusion in educational establishments–, and later, with the development of the 1940s, was the time of a pedagogization process of sports. With this theoretical positioning as a background, this paper analyzes the discourses of an important figure in this process, who’s political and sports career at the same time shows this processes passage: Benigno Rodríguez Jurado. It is especially interesting to understand his speeches about physical culture and sports, particularly those he performs as director of the Department of Physical Culture of the National University of La Plata. Regarding his idea of physical culture, it is observed that it is linked to health improvement, in line with other national and international meanings, referring to certain eugenic rhetoric. On the other hand, Rodríguez Jurado sports senses show a certain idealization of their practice, with a moralizing tone, finding tensions between school sports and federated sports. As its director, Benigno Rodríguez Jurado developed in the Department of Physical Culture, through Physical Education classes at the National College and the Secondary School of Ladies, a laboratory of ideas for schooling of sport, that is, its curricular inclusion, and then, in the General Directorate of Physical Education and Culture of the province of Buenos Aires, since 1940, to develop a pedagogization of sports.

Job loss and household labor supply adjustments in developing countries: Evidence from Argentina Ciaschi, Matías Omar Using longitudinal data for Argentina, this paper measures the labor supply reaction of different household members to a breadwinner’s job loss. Firm events and local unemployment shocks are exploited as exogenous sources of variation to estimate the causal effect. Our main findings show that job loss by the male household head has a significant and substantial effect on the labor supply response of other household members, both at the extensive and intensive margin. While we do not find any effect on daughters, female partners and sons increase their labor market participation. The latter are also more likely to drop out from the educational system. These results are stronger among economically vulnerable households.

Maternal intake of alpha-lipoic acid prevents development of symptoms associated with a fructose-rich diet in the male offspring in Wistar rats Rabaglino, Maria Belen; Moreira Espinoza, María José; Lagares, Clarisa; Garay, María Isabel; Quiroga, Patricia; Pasqualini, María Eugenia; Francini, Flavio; Beltramo, Dante Miguel The hypothesis was that maternal intake of the antioxidant alpha-lipoid acid (ALA), during the developmental period of the hypothalamic orexigenic neurons, causes a permanent beneficial effect in offspring metabolism. Pregnant Wistar rats were fed with standard diet (food) + ALA (0.4% wt/wt) from day 14 of gestation to day 20 of lactation (n = 4) or food (n = 4). At 3 months of age, male offspring born from ALA-fed rats or controls (CT) were randomly assigned to be fed with food + 10% fructose solution in drinking water (F) or food + tap water (C), resulting in four groups: ALAF, ALAC, CTF, and CTC (n = 5/group). Food intake and body weight (BW) were measured twice a week for 31 days. Metabolites' levels in blood, mRNA expressions of Npy, Agrp (hypothalamus), Fasn, Srebf1, Ppard, and Pparg (liver), and the antioxidant capacity of the liver were determined. Results significance was set at p < 0.05. Average BW gain, daily BW gain, and intraabdominal fat tissue at necropsy were higher in CTF group followed by CTC, ALAF, and ALAC groups. There were no differences between groups in Kcal intake per day. mRNA expressions of hypothalamic and hepatic genes and plasmatic levels of glucose and triglycerides were higher in CTF group followed by ALAF, CTC, and ALAC groups. Fructose intake affected the oxidative capacity of the liver, but this effect was not observed in the ALAF group. In conclusion, maternal ALA intake protected the adult offspring to develop metabolic symptoms associated with high fructose in the drinking water.

Monosialoganglioside GM1 reduces toxicity of Ptx and increase anti-metastasic effect in a murine mammary cancer model Leonhard, Victoria; Alasino, Roxana Valeria; Pasqualini, María Eugenia; Cremonezzi, David César; Garcia, Nestor Horacio; Beltramo, Dante Miguel Having demonstrated the ability of monosialoganglioside GM1 micelles as oncology drug transporter, this work focuses on evaluating its application in an in vivo system, studying the toxicity and antitumoral effect of GM1-Ptx micellar formulation. The maximum tolerated dose (MTD) obtained after intravenous administration of GM1-Ptx in mice was 55 mg/kg and the 50% lethal dose (LD50) was 70 mg/kg. This value is higher than those described for the commercial formulations TAXOL and ABRAXANE, with LD50 of 30 and 45 mg/kg respectively. The antitumor activity, mortality and incidence of metastasis were studied on a murine model of mammary gland cancer. The GM1-Ptx formulation was administered i.v. at different doses for 9 weeks using empty GM1 micelles and saline as treatment controls. Once the treatments were completed, biochemical markers were quantified and histological tissue tests were performed. The most promising results were obtained with the treatment at a dose of 15 mg/kg/twice a week, condition in which a longer survival and significant reduction in the incidence of animals with metastasis, since only one 25% of the mice showed presence of pulmonary micro metastases.

Amblyraja georgiana, Antarctic Starry Skate Pollom, R.; Acuña, E.; Bustamante, C.; Chiaramonte, Gustavo Enrique; Cuevas, J.M.; Herman, K.; Pompert, J.; Velez Zuazo, X. The Antarctic Starry Skate (Amblyraja georgiana) is a medium-sized (to 115 cm total length) deepwater skate that occurs in the Southeast Pacific Ocean off southern Chile, in the Southwest Atlantic Ocean off southern Argentina and the Falkland Islands (Malvinas), in the Atlantic and Pacific Antarctic Oceans from South Georgia Island and the Antarctic Peninsula to the Ross Sea, and in the Indian Antarctic off the Crozet Islands. It is demersal on continental and insular slopes at depths of 20?1,255 m, and is captured as bycatch in trawl and longline fisheries, particularly those targeting Patagonian Toothfish (Dissostichus eleginoides). There are no population size estimates for this skate, and it is not clear what the current population trend is. Although estimates of bycatch around South Georgia and the Ross Sea are comprised of a low percentage of overall estimated stock biomass, the demographic consequences are unknown and require further research. Furthermore, catch levels in other areas are unknown, and some specimens previously referred to as this species may include cryptic individuals of a yet-to-be-described species. Overall, it is not clear what level of fishing mortality this species is exposed to across its range, and further research is needed on distribution, population size and trend, and threats. Therefore, the Antarctic Starry Skate is assessed as Data Deficient.

Bathyraja scaphiops, Cuphead Skate Pollom, R.; Charvet, P.; Chiaramonte, Gustavo Enrique; Cuevas, J.M.; Herman, K.; Paesch, L.; Pompert, J.; Rincon, G. The Cuphead Skate (Bathyraja scaphiops) is a medium-sized (to 117 cm total length) skate that occurs in the Southwest Atlantic from off Rio Grande do Sul, Brazil to Tierra del Fuego, Argentina and the Falkland Islands (Malvinas). It inhabits continental and insular shelves and slopes at depths of 30?925 m. It is targeted or captured as utilized bycatch in demersal trawl fisheries, including the southern Brazil otter trawl fishery, the Patagonian scallop and hake fisheries, and the Falkland Islands (Malvinas) targeted multi-species skate fishery. At the northern extent of its range in southern Brazil, it is captured in the otter trawl fishery which is intense; reductions in the population are suspected there but there are no data. In the Argentina-Uruguay Common Fishing Zone (AUCFZ), this species was captured frequently in commercial trawls between 1984 and 2009. On the shelf edge off Argentina between Buenos Aires and northern Santa Cruz, this species was present in 9% of research trawls in the area trawled by the Patagonian scallop fishery in 2010. In the Falkland Islands (Malvinas), this species made up an average of 3.5% of the catch in the multi-species skate fishery between 1993 and 2013, with no clear trend in catch-per-unit-effort over that time frame. Overall, although this species is subjected to substantial fishing pressure, it has remained common in catches and it may have refuge over rough substrates that are untrawlable. Although fisheries are likely leading to some reduction in population size, the level is not suspected to approach the thresholds for a threatened assessment. Therefore, the Cuphead Skate is assessed as Least Concern.

Sesamoids in Caudata and Gymnophiona (Lissamphibia): Absences and evidence Ponssa, María Laura; Abdala, Virginia Sara Luz An integrative definition of sesamoid bones has been recently proposed, highlighting their relationship with tendons and ligaments, their genetic origin, the influence of epigenetic stimuli on their development, and their variable tissue composition. Sesamoid bones occur mainly associated with a large number of mobile joints in vertebrates, most commonly in the postcranium. Here, we present a survey of the distribution pattern of sesamoids in 256 taxa of Caudata and Gymnophiona and 24 taxa of temnospondyls and lepospondyls, based on dissections, high-resolution X-ray computed tomography from digital databases and literature data. These groups have a pivotal role in the interpretation of the evolution of sesamoids in Lissamphibia and tetrapods in general. Our main goals were: (1) to contribute to the knowledge of the comparative anatomy of sesamoids in Lissamphibia; (2) to assess the evolutionary history of selected sesamoids. We formally studied the evolution of the observed sesamoids by optimizing them in the most accepted phylogeny of the group. We identified only three bony or cartilaginous sesamoids in Caudata: The mandibular sesamoid, which is adjacent to the jaw articulation; one located on the mandibular symphysis; and one located in the posterior end of the maxilla. We did not observe any cartilaginous or osseous sesamoid in Gymnophiona. Mapping analyses of the sesamoid dataset of urodeles onto the phylogeny revealed that the very conspicuous sesamoid in the mandibular symphysis of Necturus beyeri and Amphiuma tridactylum is an independent acquisition of these taxa. On the contrary, the sesamoid located between the maxilla and the lower jaw is a new synapomorphy that supports the node of Hydromantes platycephalus and Karsenia coreana. The absence of a mandibular sesamoid is plesiomorphic to Caudata, whereas it is convergent in seven different families. The absence of postcranial sesamoids in salamanders might reveal a paedomorphic pattern that would be visible in their limb joints.

Sobre el género Chaudoirina Mateu (Coleoptera: Carabidae): aspectos nomenclaturales y patrones de distribución de sus especies, con dos nuevas citas para Chile; On the genus Chaudoirina Mateu (Coleoptera: Carabidae), nomenclatural aspects and distribution patterns of its species, with two new citations for Chile Cid Arcos, Mauricio; Roig, Sergio Alberto El presente trabajo busca clarificar aspectos nomenclaturales de Chaudoirina, proporcionar una clave e ilustraciones para identificar sus especies y entregar datos sobre su distribución, citando a C. vianai y C. orfilai para Chile

Length-weight relationship of fish from high mountain freshwater environments of the central Andes, Argentina; Relación largo-peso de peces de ambientes de agua dulce de alta montaña de los Andes centrales, Argentina Rios, Juan Manuel; Teixeira de Mello, Franco This study provides the length-weight relationship in four nonnative and one nativefish species of the central Andes, Argentina. The only species showing positive allometricgrowth was the native torrent catfish Hatcheria macraei.; Este estudio proporciona las relaciones largo-peso para cuatro especies de peces exóticas y una nativa de los Andes centrales, Argentina. La única especie que mostró un crecimiento alométrico positivo fue la especie nativa bagre torrente Hatcheria macraei.

The xenarthrans of Honduras: new records, main threats, and comments on their conservation status; Los xenartros de Honduras: nuevos registros, principales amenazas y comentarios sobre su estado de conservación Turcios Casco, Manfredo A.; Ávila Palma, Hefer D.; Martínez, Marcio; Trejo Ordoñez, Eduardo J.; Meza Flores, David E.; Castañeda, Franklin; King, Travis; Thornton, Daniel; Superina, Mariella The Xenarthra are one of the least studied mammalian groups in Honduras. Their ecology, natural history, and distribution in the country are poorly known. Here we compile and discuss, for the first time, the available information about the seven species of Xenarthra that occur in Honduras. We also present new distribution records and comment on their main threats. The lack of specific scientific studies, poaching, illegal traffic, cultural beliefs, and deforestation are among the main threats to xenarthrans in Honduras.; Xenarthra es uno de los grupos de mamíferos menos estudiados en Honduras, y de los que menos se sabe sobre su ecología, historia natural y distribución en el país. Aquí recopilamos y discutimos, por primera vez, la información disponible de cada una de las siete especies de Xenarthra que ocurren en Honduras. También presentamos nuevos registros de distribución y comentamos sobre las principales amenazas. La falta de estudios científicos, la cacería y el tráfico ilegal, creencias culturales y la deforestación están entre algunas de las principales amenazas para los xenartros en Honduras.

Recalibrating immunity in cancer and autoimmune inflammation by lectin-driven regulatory circuits Bach, Camila Agustina; Cutine, Anabela María; Laporte, Lorena; Mahmoud, Yamil Damián; Manselle Cocco, Montana Nicolle; Massaro, Mora; Merlo, Joaquín Pedro; Perrotta, Ramiro Martin; Sarbia, Nicolás; Veigas, Florencia; Rabinovich, Gabriel Adrián Endogenous lectins play key roles in cell homeostasis by decoding the informationencrypted in glycans present on the cell surface or extracellular matrix. Galectins, a familyof soluble lectins, have emerged as central regulators of innate and adaptive immuneresponses. In this article we review seminal work demonstrating the immunoregulatoryroles of Galectin-1 (Gal-1), a proto-type member of the galectin family, and highlightcentral mechanisms that control its functions in cancer and autoimmune inflammation.Understanding the cellular pathways that control Gal-1 expression and function in tumorand inflammatory microenvironments will set the bases for the design of rational therapiesbased on positive or negative modulation of this endogenous lectin in cancer andautoimmune diseases.

Influence of the N atom and its position on electron photodetachment of deprotonated indole and azaindole Noble, Jennifer Anna; Marceca, Ernesto José; Dedonder, Claude; Jouvet, Christophe Electron photodetachment of cold deprotonated indole and azaindole anions has been studied by use of a mass-selective photofragmentation spectrometer capable of negative ion and neutral particle detection. The electron affinities of the indolyl radical and the 5-, 6- A nd 7-azaindolyl radicals have been measured with an uncertainty of less than 0.002 eV. The presence of the nitrogen atom in the six-membered ring of the azaindolide anions stabilises the electron by 0.3 to 0.4 eV, i.e. about 10-15%, compared to the indolide anion. No fragmentation was observed in either the anionic or radical forms of the species studied. The appearance of dipole-bound states in the spectra of deprotonated 6- A nd 7-azaindole anions allowed us to analyse the vibrational structure of the neutral 6- A nd 7-azaindolyl radicals produced following photodetachment. Although no dipole-bound states were clearly identified for deprotonated indole or 5-azaindole, the shape of the photodetachment threshold suggests the presence of a very weakly dipole-bound state or dipole resonance, which cannot be resolved with our laser resolution.