La forma de la expansión urbana en una ciudad media del interior de la pampa bonaerense desde una perspectiva histórica urbano-ambiental (1779-2021); The shape of urban expansion in a middle city in the interior of the pampa bonaerense from an urban-environmental historical perspective (1779-2021) Giusti, Mariana; Goicoechea, María Eugenia El presente artículo tiene por objetivo analizar las formas y tendencias que adoptó la expansión de la matriz edificada de una ciudad intermedia localizada en el interior de la región pampeana bonaerense (Chascomús, Provincia de Buenos Aires, Argentina). El estudio abarca el período 1779-2021 y se centra en la tríada historia, territorio y norma. Con un diseño metodológico que recupera y sistematiza una gran base empírica, se integran en el análisis: el efecto de las relaciones históricas, económicas y sociales; las características territoriales y ambientales; y la influencia de las normativas en las formas que adoptó la expansión urbana. El trabajo, además de ser ilustrativo de un contexto general de crisis del modelo de desarrollo geográfico basado en la primacía urbana y del cuestionamiento al afianzamiento de estructuras macrocefálicas, aporta al conocimiento de las dificultades que se presentan en este tipo de ciudades, recorriendo su conformación físico-espacial, sus limitaciones, amenazas y potencialidades.; The objective of this article is to analyze the forms and trends adopted by the expansion of the built matrix of an intermediate city located in the interior of the Buenos Aires Pampean region (Chascomús, Buenos Aires Province, Argentina). The study covers the period 1779-2021 and focuses on the triad of history, territory and norm. With a methodological design that recovers and systematizes a great empirical base, the following aspects are integrated into the analysis: the effect of historical, economic and social relationships; territorial and environmental characteristics; and the influence of regulations on the forms adopted by urban expansion. The work, in addition to being illustrative of a general context of crisis of the geographic development model based on urban primacy and the questioning of the consolidation of macrocephalic structures, contributes to the knowledge of the difficulties that arise in this type of cities, covering their physical-spatial conformation, its limitations, threats and potentialities.

Development of a honey-based powder ingredient using a mixture design: Botanical origin effect and hydration properties Rivero, Roy Cristian; Archaina, Diego Alberto; Busquet, Cynthia Melisa; Baldi Coronel, Bertha Mabel; Busch, Verónica María The aim of this research was to develop and characterize a high honey content powder with good functional, sensory and hydration properties. A four-responses (hygroscopicity, solubility, cohesiveness and global sensory acceptability) D-optimal mixture design by Design Expert was used. Three factors were selected for the freeze-drying process: honey (60–80%), gum arabic – GA(0–40%) and whey protein concentrate – WPC (0–40%). Three optimal formulations (physicochemical–OPCP–, sensory–OSP– and combined–OCP–) with 72–74% of honey and different GA:WPC ratios were studied. The model prediction was successfully confirmed for the optimal points. Hydration and antioxidant characteristics were evaluated in optimal formulations for honey of three different botanical origins (Eucalyptus, Citrus and Prairie). Water sorption isotherms were sigmoid shape type II for all samples, with a slight difference at high aw for OSP. Flowability (4.5–16.3Ci), hygroscopicity (19.5–24.4 g/100 g), and solubility (87.1–94.6%), were within typical ranges. The botanical origin showed little influence in the physicochemical characteristics but showed differences in the antiradical activity (Prairie honey showed the highest values). These honey powders could be used in a variety of products in the food industry, as food ingredients or directly as a natural sweetener, promoting and diversifying honey consumption.

Oily Bilge Wastes Harbor a Set of Persistent Hydrocarbonoclastic Bacteria Accompanied by a Variable alkB Gene Composition in Marine Vessel Samples from Southwestern Atlantic Port of Mar del Plata, Argentina Corti Monzón, Georgina de la Paz; Nisenbaum, Melina; Peressutti, Silvia Rita Peressutti; Junca, Howard; García Bonilla, Erika; Murialdo, Silvia Elena The present work provides the first knowledge about the diversity and functionality of the microorganisms occurring in oily bilge wastes, from the port of Mar del Plata, Argentina. We used a culture independent approach, based on massive sequencing of the 16S rRNA gene (Illumina), to analyze the microbiome structure from different oily bilge wastes. To gain insight into functional biomarkers for hydrocarbon (HC) degradation in these wastes, the occurrence of alkB genes in the degrading bacteria communities was also investigated trough PCR-DGGE method. The microbial compositions were determined in bilge waste oily phase (BWOP) samples from a deep-sea, a fishing ship, a dredge ship, a small coastal vessel, and an open pool, where bilge wastes from Mar del Plata’s vessels are deposited. A core microbiome with OTUs classified as bacterial types associated with HC biodegradation was found across all samples. Seven highly predominant and stable bacterial types accounted for 82% of the relative composition determined in all the BWOP samples. These results indicate that oily bilge is a strong selector for bacteria having common taxonomical and functional features, independent of the vessel of collection. Alkane degradation marker gene alkB PCR-DGGE fingerprinting showed distinct diversity patterns among the samples. Our analysis showed that there is a well-defined bacterial assemblage able to withstand and thrive in the harsh conditions of the oily bilge wastes. Also, a well-established aliphatic biodegradation potential marker was detected, indicating that it could promptly be used for the generation of new bioremediation technologies.

Revisiting British Investment in Latin America: The River Plate Trust Group, 1879–1963 Lanciotti, Norma Silvana The article analyses the performance and profitability of the firms controlled by the River Plate Trust Group in Argentina and Uruguay from 1879 to 1960 to challenges the notion that British investments in the Southern Cone involved greater default or insolvency risks because of nationalism, expropriations, and over-taxation. Also known as Morris or Morrison group, River Plate Trust became the most important British business group in the region during the First Global Period, as it controlled a number of public utilities, mortgage and financial firms. Our case shows that the decline of British investment in mortgage and financial activities did not mark the end of this business cycle after WWI; rather, it signalled a change in the direction of capital flows. Capital outflows from host economies to Great Britain—via dividends—continued over the interwar period, with only a brief interruption between 1931 and 1934. The business cycle of British firms entered a new phase, characterized by stagnant British investments and increasing capital returns from Argentina and Uruguay to Great Britain. Moreover, British public utility firms continued to invest in the River Plate until the 1940s, because profits from the region supported the distribution of high dividends to shareholders.

Sulfate performance of calcined illitic shales Cordoba, Gisela Paola; Irassar, Edgardo Fabián In the past, calcined pozzolans were largely used in massive concrete, and nowadays, they appear as an excellent alternative to reduce the clinker factor in general use cement. The pozzolanic activity of two calcined illitic shales (CIS) is verified using different standards, indicating the importance of the water requirement for these pozzolans. The sulfate performance of blended cement containing 0, 20, and 40% of CIS was studied with high and low C3A cement using the ASTM C1012 test. Results show that highly reactive CIS is necessary to control the expansion of high C3A-cement at constant w/cm. For low-C3A cement, the highly reactive CIS provides high-sulfate resistant cement with low CIS-replacement, while the water requirement of the other CIS is the main shortcoming to obtain this property. CIS contributes to sulfate resistance due to the CH-consumption and reduction of ions ingress that impedes ettringite and gypsum formation.

Comparison of premix glyphosate and 2,4-D formulation and direct tank mixture for control of Conyza canadensis and Epilobium ciliatum Palma Bautista, Candelario; Cruz Hipólito, Hugo E.; Alcántara de la Cruz, Ricardo; Vázquez García, José G.; Yanniccari, Marcos Ezequiel; De Prado, Rafael Premix or tank mix of glyphosate and 2,4-D are a good alternative to control glyphosate-resistant and -tolerant weeds; however, the combination of herbicides may increase the environmental impacts, since mixtures often have higher toxicity than a single herbicide. In addition, antagonism between these herbicides has also been reported. We compared the efficacy of a premix glyphosate+2,4-D formulation with respect to the tank mix of both herbicides on glyphosate-resistant Conyza canadensis and -tolerant Epilobium ciliatum populations in laboratory and field experiments. 2,4-D suppressed the glyphosate-resistance/tolerance of both species, whose populations presented similar responses to their susceptible counterparts (LD50 ≥ 480+320 g ha−1 glyphosate + 2,4-D, respectively). Plants of both species treated with the premix formulations retained ∼100-μL more herbicide solution, accumulated 20–25% and 28–38% more shikimate and ethylene, respectively, and presented greater 14C-glyphosate absorption and translocation, depending on the species, compared to plants treated with the tank mix treatment. Although doubling the field dose (720 + 480 g ha−1) improved (5–22%) the control of these weeds in the field, split applications of both premix and tank mix provided the best control levels (≤70%), but premix treatments maintained control levels above 85% for longer (120-d). No antagonism between glyphosate and 2,4-D was found. The addition of 2,4-D controlled both broadleaf species. For all parameters evaluated on the C. canadensis and E. ciliatum populations in the laboratory and in the field, the premix treatments showed better performance than the tank mix treatments. Premix formulations could reduce the environmental impact of herbicides used to control glyphosate resistant/tolerant weeds by decreasing the herbicide amount needed to achieve an acceptable weed control level.

1ª Campanha para a erradicação do racismo na Educação Superior na América Latina; 1ª Campaña para la erradicación del racismo en la Educación Superior en América Latina; 1st Campaign for the eradication of racism in Higher Education in Latin America do Amaral, Wagner Roberto; Cachambi Patzi, Nayra Eva A persistência das múltiplas expressões do racismo na sociedade e na educação superior é um fato estrutural e histórico que acompanha as práticas de ensino, pesquisa e extensão, bem como a dinâmica funcional e cotidianas das instituições, afetando assim o ingresso, permanência e egresso de milhares de estudantes. Um dos objetivos deste artigo é socializar as ações realizadas a partir da 1ª Campanha para a Erradicação do Racismo na Educação Superior na América Latina coordenada pela Cátedra UNESCO “Educação Superior e Povos Indígenas e Afrodescendentes na América Latina” (UNTREF), desenvolvida no ano de 2020. Outro deles é refletir sobre o processo de construção de redes colaborativas e comunidades de aprendizagens, vivido pelos integrantes dos grupos de trabalho constituídos. O artigo apresenta reflexões sobre as conquistas alcançadas pelas diferentes experiências, desafios e perspectivas para cada uma das instituições envolvidas. Ressalta-se que a Campanha consistia na realização de ações na internet, pensadas antes da pandemia, sendo que o contexto global e o isolamento apenas reafirmavam a necessidade de trabalhar em ambientes virtuais. A Campanha se apresentou como uma das diferentes iniciativas realizadas na América Latina para visibilizar, problematizar, promover e traçar novas agendas para continuar atuando por uma educação superior antirracista e intercultural. Desta maneira, torna-se um espaço singular e coletivo para nutrir e inspirar-se a partir das analises empíricas das expressões e situações de racismo ‒sentidas, pensadas e enfrentadas por diferentes sujeitos que protagonizam seu enfrentamento‒ dentro e fora das IES.; La persistencia del racismo en la sociedad y en la educación superior es un hecho estructural e histórico que acompaña las prácticas de docencia, investigación y extensión, como también, las dinámicas funcionales y cotidianas de las instituciones, afectando el ingreso, egreso y permanencia de miles de estudiantes. Uno de los objetivo de este artículo es socializar las acciones desarrolladas a partir de la 1er Campaña para la Erradicación del Racismo en la Educación Superior en América Latina, coordinado por la Cátedra UNESCO de “Educación Superior y Pueblos Indígenas y Afrodescendientes” en América Latina (UNTREF), desarrollado en el año 2020. Otro de ellos es reflexionar acerca del proceso de construcción de redes colaborativas y comunidades de aprendizaje vivenciado por los miembros de los grupos de trabajo conformados. El artículo presenta reflexiones sobre los logros alcanzados por las diferentes experiencias, desafíos y perspectivas para cada una de las instituciones involucradas. Cabe señalar que la campaña consistió en realizar acciones en internet, esto fue pensado antes de la pandemia, el contexto global y el aislamiento solo reafirmaron la necesidad de trabajar en entornos virtuales. La campaña se presenta como una de las diferentes iniciativas que se llevan a cabo en América Latina para visibilizar, problematizar, promover y delinear nuevas agendas para seguir trabajando por una educación superior antirracista e intercultural. De esta manera, se torna en un espacio singular y colectivo para nutrirse e inspirarse en análisis empíricos de las expresiones y situaciones de racismo ‒sentidas, pensadas y enfrentadas por diferentes sujetos que lideran su enfrentamiento‒dentro y fuera de las IES.

Resistance to β-lactams in Streptococcus pneumoniae Von Specht, Martha Helena; García Gabarrot, Gabriela; Mollerach, Marta Eugenia; Bonofiglio, Laura; Gagetti, Paula Silvana; Kaufman, Sara; Vigliarolo, Laura; Toresani, Silvia María Ines; Lopardo, Horacio Angel Streptococcus pneumoniae is an important causal agent of pneumonia, meningitis, sepsis, bacteremia, and otitis media. Penicillin resistance rates in S. pneumoniae have remained stable in Argentina in the last years. In the late ?90s more isolates with MIC of penicillin ≥2 μg/ml were observed; however, their frequency has decreased in recent years. The phenotypic expression of penicillin resistance is due to a modification in penicillin-binding proteins associated with a mosaic structure in the coding genes. The expansion of successful resistant clones varies among the different regions and is influenced by the use of antibiotics, vaccines, particularly conjugated ones, as well as population density. Parenteral treatment with high doses of penicillin G continues to be effective for the treatment of pneumonia and bacteremia, oral aminopenicillins for otitis media and sinusitis and third generation cephalosporins for meningitis.

Da Dilma a Bolsonaro: Crisi d’egemonia e svolta autoritaria in Brasile? Clemente, Dario Considering the events that affected Brazil between 2013 and 2016 as a crisis of hegemony, the author analyses the impeachment of the President of the Republic, Dilma Rousseff, and the consequent election of Jair Bolsonaro as an authoritarian turn supported by the Brazilian ruling class. The hypothesis is that recent events in Brazil determined the closure of a political cycle that began in 1988 and the opening of a new phase.; Considerando los hechos que afectaron a Brasil entre 2013 y 2016 como una crisis de hegemonía, el autor examina el impeachment de la presidenta de la republica Dilma Rousseff y la consecuente elección de Jair Bolsonaro como una salida autoritaria apoyada por las clases dominantes brasileñas. La hipótesis es que los eventos recientes en Brasil han marcado el cierre de un ciclo político comenzado en 1988 y abierto una nueva fase.; Considerando gli avvenimenti che hanno interessato il Brasile tra il 2013 e il 2016 come una crisi d’egemonia, l’autore esamina la messa in stato di accusa della presidente della repubblica Dilma Rousseff e la conseguente elezione di Jair Bolsonaro come svolta autoritaria sostenuta dalle classi dominanti brasiliane. L’ipotesi è che i recenti avvenimenti in Brasile segnalino la chiusura di un ciclo politico iniziato nel 1988 e l’apertura di una fase nuova.

"Una esquina muy particular": disputas patrimoniales en un ex centro clandestino de detención de la ciudad de Rosario (2015-2019); “A very particular corner”: heritage disputes in a former clandestine detention center of Rosario city (2015-2019) Cinto, Agustina El artículo se propone analizar una serie de disputas patrimoniales en torno al ex centro clandestino de detención (CCD) Servicio de Informaciones de la Policía de Santa Fe, ubicado en la ciudad de Rosario, que funcionó entre los años 1976 y 1980, durante la última dictadura. Considerando al patrimonio como objeto sagrado laicizado atravesado por disputas, delimitamos para el análisis el período 2015-2019, cuando el ex CCD fue inaugurado como Espacio de Memoria. Sostenemos que, en el proceso que involucra tanto al Estado como al movimiento de derechos humanos y a expertos/as de la materialidad, pueden distinguirse dos aspectos que valorizan de manera diferente al ex CCD, así como dos criterios de intervención patrimonial que conviven y se tensionan entre sí. En ese marco, la (des)sacralización patrimonial del ex CCD, sus características y prácticas posibles adquieren sentido situacionalmente, de acuerdo a los/as actores que las llevan a cabo. El problema abordado forma parte de una investigación doctoral en curso, desarrollada mediante un trabajo de campo etnográfico, que incluye observaciones participantes y entrevistas no dirigidas, acompañado de análisis documental y relevamiento periodístico y fotográfico.; This paper aims to analyze a series of heritage disputes around the former clandestine detention center (CDC) Information Service of Santa Fe’s state police department, located in Rosario city, which functioned between 1976 and 1980, during the last dictatorship. Considering heritage as a sacred laicized object and crossed by disputes, we delimited a period between 2015 and 2019 for the analysis, when the former CDC was inaugurated as Space of Memory. In this process, which involves the State, the Human Rights movement, and experts in materiality, we distinguished two aspects, which valorize it in different ways, as well as two related but opposite heritage intervention criteria. In this framework, the former CDC (des)sacralization, its characteristics, and possible practices have meaning situationally, according to the actors who carry them out. The problem is part of an ongoing doctoral research, developed through an ethnographic fieldwork since 2015, which includes participant observations and non-directive interviews, but also documentary and press analysis and photographic record.

Los discursos políticos del patrimonio: Un caso de activación patrimonial en Argentina; The political discourses of heritage: A case of asset activation in Argentina Mariano, Mercedes; Conforti, María Eugenia Este trabajo se inscribe en el marco de un programa interdisciplinario de estudios del patrimonio, específicamente en un proyecto de investigación que busca analizar la relación que las comunidades locales de ciudades intermedias establecen con el patrimonio cultural. En este sentido, se han realizado estudios en el área centro de la provincia de Buenos Aires, Argentina. El partido de Benito Juárez constituye uno de los casos en el que se investiga de manera sistemática desde hace 5 años. Se destacan en él algunas particularidades respecto de los procesos de puesta en valor y activación patrimonial que ponen sobre el escenario diferentes, pero articuladas, modalidades de gestión y participación: estatal, alternativas y comunitarias.Objetivo: En ese marco, se propone identificar y analizar las discursividades que se construyen, desde la perspectiva nativa estatal, durante el acto de patrimonialización de la estancia fundacional del partido:El Sol Argentino.Métodos: Se utilizó una metodología cualitativa basada en la observación participante durante el evento y el análisis de los discursos políticos públicos.Resultados: Se pudo identificar que los valores puestos en juego desde la gestión para legitimar dicho bien cultural como patrimonio local son aquellos referidos a su materialidad, especialmente sus condiciones arquitectónicas y no aquellos vinculados con una historia común que habilite nuevas lógicas de significación, uso y apropiación del bien.Conclusiones: Consideramos que el principal desafío está en promover prácticas patrimoniales que habiliten otras formas de reflexión no hegemónicas, de tipo más colectivas y comunitarias.; This work is part of an interdisciplinary program of heritage studies, specifically in a research Project that seeks to analyze the relationship that local communities in intermediate cities establish with cultural heritage. In this sense, studies have been carried out in the central area of the province of Buenos Aires, Argentina. Benito Juárez's party constitutes one of the cases in which it has been systematically investigated for 5 years. I thighlights some peculiarities regarding the processes of enhancement and asset activation that put on the stage different, but articulated, management and participation modalities: state, alternative and community. Objective Within this framework, it is proposed to identify and analyze the discursivities that are constructed, from the native state perspective, during the act of patrimonialization of the founding stay of the party: «El Sol Argentino». Method A qualitative methodology based on participant observation during the event and analysis of public political discourses was used. Results It was possible to identify that the values putting to play by the management to legitimize said cultural asset as local heritage are those referring to its materiality, especially its architectural conditions and not those related to a common history that enables new logics of meaning, use and appropriation of good. Conclusions We consider that the main challenge is to promote patrimonial practices that enable other forms of nonhegemonic reflection, of a more collective and community type.

"El tango es un sentimiento": Un abordaje socio semiótico de la dimensión emocional en la recepción del tango; “Tango is a feeling”: A social semiotic approach on the emotional dimension in tango reception Montes, Maria de Los Angeles Las emociones, los afectos, son parte fundamental del sentido que son capaces de producir la música y la danza. Y, aunque pueden parecer efectos inmediatos, son en realidad el resultado de complejos procesos inferenciales, condicionados por las prácticas de apropiación en las que se insertan. En esta comunicación presentamos los resultados de una investigación sobre la dimensión afectiva en los procesos de interpretación y apropiación del tango argentino entre milongueros. Nos preguntamos: ¿Qué se siente al escuchar y bailar el tango? ¿Por qué se producen esos efectos? ¿Cómo interpretan los milongueros esos afectos? ¿Qué ocurre cuando éstos ingresan a sus narrativas identitarias?La principal conclusión a la que arribamos es que entre los efectos emocionales producidos en el marco de esa apropiación que es la danza, y su aparición en los relatos de los milongueros, existe un salto semiótico que solo puede comprenderse correctamente en clave socio semiótica.; Emotions, affects, represent an essential part of the sense that is capable of producing music and dance. And however immidiate those effects may seem, in actuality, they are the result of complex inferential processes, conditioned by the appropriation practices in which they are inserted. In this paper, we put forth the results of a research on the affective dimension in the processes of interpretation and appropriation of Argentine tango among milongueros (casual tango dancers). We ask ourselves: How does it feel to listen to and dance tango? Why do these effects occur? How do milongueros interpret these affects? What happens when they enter their identity narratives? Our main conclusion is that among the emotional effects produced between the framework of the appropriation of the dance and their emergence in milongueros’ stories, there is a semiotic leap that can only be properly understood in a socio-semiotic key.

Time to integrate pollinator science into soybean production Garibaldi, Lucas Alejandro; Schulte, Lisa A.; Nabaes Jodar, Diego Nicolás; Gómez Carella, Dulce Sol; Kremen, Claire Soybeans cover 129 million hectares globally. Soybean productivity can increase with pollinator management, but soybean cultivation practices commonly ignore biotic pollination. If pollinator habitats are created within soybean landscapes and policies to limit agricultural expansion are implemented, millions of hectares could be restored for biodiversity without loss of soybean production.

Pharmacological inactivation of catsper blocks sperm fertilizing ability independently of the capacitation status of the cells: implications for non-hormonal contraception Curci, Ludmila; Carvajal, Guillermo; Sulzyk, Valeria; Gonzalez, Soledad Natalia; Cuasnicu, Patricia Sara Cation channel of sperm (CatSper), the main sperm-specific Ca2+ channel, plays a key role in mammalian fertilization, and it is essential for male fertility, becoming an attractive target for contraception. Based on this, in the present work, we investigated the effects of CatSper inactivation on in vitro and in vivo sperm fertilizing ability and the mechanisms underlying such effects. Exposure of cauda epididymal mouse sperm to different concentrations (1–20 μM) of the potent CatSper inhibitor HC-056456 (HC) during in vitro capacitation showed no effects on sperm viability but significantly affected Ca2+ entry into the cells, progressive motility, protein tyrosine phosphorylation, induced acrosome reaction, and hyperactivation, as well as the sperm’s ability to in vitro fertilize cumulus oocyte complexes and zona-free eggs. Whereas the presence of HC during gamete coincubation did not affect in vitro fertilization, exposure of either non-capacitating or already capacitated sperm to HC prior to gamete coincubation severely reduced fertilization, indicating that sperm function is affected by HC when the cells are incubated with the drug before sperm–egg interaction. Of note, insemination of HC-treated sperm into the uterus significantly or completely reduced the percentage of oviductal fertilized eggs showing, for the first time, the effects of a CatSper inhibitor on in vivo fertilization. These observations, together with the finding that HC affects sperm fertilizing ability independently of the sperm capacitation status, provide further insights on how CatSper regulates sperm function and represent a solid proof of concept for developing a male/female non-hormonal contraceptive based on the pharmacological blockage of CatSper activity.

Population responses of pest birds across a forest cover gradient in the Chaco ecosystem Verga, Ernesto Gustavo; Huais, Pablo Yair; Herrero, María Lucrecia Industrial agriculture can trigger an increase in abundance of some bird species, promoting the emergence of pests, causing damage to crops and economic loss for farmers. Even though there are different strategies to control pest birds (chemicals, hunting, repellents, etc), in general they are inefficient. Moreover, these strategies can threaten non-target species, and toxic substances can be bioaccumulated in the food chain of wildlife animals. An alternative strategy (or at least complementary) could be the design of agricultural landscapes that balance natural habitats and crop production areas in a way that would not trigger the abundance increases of potential pest birds. We assessed population trends of four bird species (potentially agricultural pests) across a forest cover gradient, and consequently, a gradient of agricultural cover expansion, at a landscape level. The study was conducted in the Chaco forest, one of the most threatened ecosystems worldwide due to agricultural expansion. Studied species were Eared Dove (Zenaida auriculata), Spot-winged Pigeon (Patagioenas maculosa), Picazuro Pigeon (Patagioenas picazuro) and Monk Parakeet (Myiopsitta monachus), and their populations are often considered as the major pest birds for agriculture in several areas of Argentina and in other countries of South America. Abundances of birds species were measured in focal sites (forest patches) and the percentage of forest cover was estimated within buffers of 2000 m radius surrounding each site. A total of 12 local landscapes were surveyed. Results show that population responses (i.e. changes in abundance) to the gradient of forest cover were idiosyncratic. The main result shows that relative abundance of Eared Dove, the most abundant species, was triggered when landscapes had less than 16% of forest cover: landscapes with low forest cover (less than 10%) contained six times the relative abundance of Eared Dove than landscapes with a high percentage of forest cover (close to 100%). We propose that as pest birds in agroecosystems are a problem at the landscape or regional scale, solutions should be thought at such scale. In this context, landscapes in the region should conserve more than 16% of forest cover to attempt to control one of the most abundant pest bird species of South America.

Business with Purpose and the Purpose of Business Schools: Re-Imagining Capitalism in a Post Pandemic World: A Conversation with Jay Coen Gilbert, Raymond Miles, Christian Felber, Raj Sisodia, Paul Adler, and Charles Wookey Rocha, Hector; Pirson, Michael; Suddaby, Roy The emergence of innovative business models suggests that the foundational assumptions of competitive capitalism are increasingly in doubt. Business schools, however, appear to be followers rather than leaders in this historical moment of social change. While consumers and businesses are experimenting with new models of capitalism, business schools have been slow to change. What role should business schools play in this emerging new era of purpose-driven capitalism and business with purpose? We explore this question in conversation with six global experts, three in academia and three in practice, who are leading this change. The experts conclude that business must serve the needs of humanity rather than the needs of business. Business schools, therefore, need to reduce their emphasis on how to make businesses more rational and efficient and should instead focus on how businesses can help address more fundamental questions of the human condition.

Cdc42 localized in the CatSper signaling complex regulates cAMP‐dependent pathways in mouse sperm Luque, Guillermina Maria; Xu, Xinran; Romarowski, Ana; Gervasi, María G.; Orta, Gerardo; De la Vega Beltrán, José L.; Stival, Cintia Estefanía; Gilio, Nicolás; D'alotto Moreno, Tomas; Krapf, Dario; Visconti, Pablo E.; Krapf, Diego; Darszon, Alberto; Buffone, Mariano Gabriel Sperm acquire the ability to fertilize in a process called capacitation and undergo hyperactivation, a change in the motility pattern, which depends on Ca2+ transport by CatSper channels. CatSper is essential for fertilization and it is subjected to a complex regulation that is not fully understood. Here, we report that similar to CatSper, Cdc42 distribution in the principal piece is confined to four linear domains and this localization is disrupted in CatSper1-null sperm. Cdc42 inhibition impaired CatSper activity and other Ca2+-dependent downstream events resulting in a severe compromise of the sperm fertilizing potential. We also demonstrate that Cdc42 is essential for CatSper function by modulating cAMP production by soluble adenylate cyclase (sAC), providing a new regulatory mechanism for the stimulation of CatSper by the cAMP-dependent pathway. These results reveal a broad mechanistic insight into the regulation of Ca2+ in mammalian sperm, a matter of critical importance in male infertility as well as in contraception.

Descripción de la fauna de mosquitos (díptera culicdae) en el departamento Formosa, provincia de Formosa, República Argentina; Description of the mosquito fauna (Diptera culicidae) in the Department of Formosa, Province of Formosa. Argentine Republic Hoyos, Carlos Blas; Monzon, Carlos Manuel Una gran diversidad de especies ha sido descripta como miembros de la familia Culicidae. Ampliamente distribuidas por todo el mundo es reconocida su importancia, como vectores de diversas enfermedades. En la región del Nordeste Argentino se han producido aportes sistemáticos basados en las características de sus hábitats y la preferencia de sus hospedadores. En la provincia de Formosa se han citado solo 63 especies en contraste con los 94 citadas para la provincia del Chaco y 189 para la provincia de Misiones. El presente trabajo basó su estudio en la composición, abundancia y diversidad de la población de culícidos en el departamento Formosa.; A great diversity of species has been described as members of the family Culicidae. They are widely distributed all over the world and their importance as vectors of several diseases is well known. In the Northeastern region of Argentina, systematic contributions have been made based on their habitat characteristics and host preference. In the province of Formosa only 63 species have been cited in contrast to the 94 cited for the province of Chaco and 189 for the province of Misiones.The present work was based on the composition, abundance and diversity of the culicidae population in the department of Formosa.

Adrenal cortex stimulation with hCG in spayed female dogs with Cushing's syndrome: Is the LH-dependent variant possible? Espiñeira, Ignacio M.; Vidal, Patricia Noemi; Ghersevich, María Carolina; Arias, Elber A. Soler; Bosetti, Fernanda; Blatter, María F. Cabrera; Miceli, Diego Daniel; Castillo, Víctor A. The expression and overexpression of luteinizing hormone (LH) receptors in the canine adrenal gland cortex have been reported. Therefore, it was hypothesized that a LH-dependent form of Cushing´s syndrome (CS) could exist in dogs.

Intratables en pandemia: Cambios y continuidades en el panelismo televisivo Heram, Yamila Tomando como punto de partida la conferencia de prensa del presidente dela nación Alberto Fernández (8 de mayo de 2020) en la que anuncia la continuidad delAislamiento Social Preventivo y Obligatorio (ASPO) por COVID-19 en Argentina, nosproponemos analizar de qué manera el programa de panelismo Intratables cambió en suemisión postconferencia como consecuencia de la relevancia político-social que conllevódicho acontecimiento. El interés por indagar en una emisión postconferencia resulta relevante en la conjunción de dos aspectos centrales: por un lado, las conferencias de prensaen los inicios de la pandemia han acaparado la atención de los medios y las redes sociales,en ellas se anuncian los cambios y continuidades de la cuarentena en sus diferentes fases.Por el otro, indagar en uno de los pocos programas de la televisión que en el horario delprime time se ocupa de la actualidad bajo uno de los géneros más transversales como es elpanelismo, reviste de especial interés en un contexto de crisis sanitaria como el actual enel que el consumo de medios se ha incrementado; Taking as a starting point the press conference of the president of the nation Alberto Fernández (May 8, 2020) in which he announces the continuity of the Preventive and Mandatory Social Isolation due to COVID-19 in Argentina, we propose to analyze what in this way, the Intratables panelism program was reconfigured after this media event. The interest in investigating a post-conference broadcast is relevant in the conjunction of two central aspects: on the one hand, the press conferences at the beginning of the pandemic have captured the attention of the media and social networks, in which the changes are announced and continuities of the quarantine in its different phases. On the other hand, investigating one of the few television programs that in prime time deals with current affairs under one of the most transversal genres such as panelism, is of special interest in a context of health crisis such as the current one in which media consumption has increased.; Tomando como ponto de partida a conferencia do presidente da nação Alberto Fernández (8 de maio de 2020) em que anuncia a continuidade do Isolamento Social Preventivo e Obrigatório devido ao COVID-19 na Argentina, propomos analisar o que desta forma, o programa de painel Intratables foi reconfigurado após este evento de mídia. O interesse em investigar uma transmissão pós-conferência é relevante na conjunção de dois aspectos centrais: por um lado, as entrevistas coletivas no início da pandemia chamaram a atenção da mídia e das redes sociais, nas quais as mudanças são anunciadas e continuidades da quarentena em suas diferentes fases. Por outro lado, a investigação de um dos poucos programas de televisão que em horário nobre trata as notícias sob um dos gêneros mais transversais como o painelismo, é de especial interesse em um contexto de crise de saúde como o atual em que o consumo de mídia aumentou