Biometrics and body masses of some birds of prey of Argentina Aráoz, Rodrigo; Ortiz, Diego; Capllonch, Patricia We present data from 97 live specimens from 20 different taxa of diurnal raptors from Argentina. Data were obtained from bird banding campaigns conducted by the Centro Nacional de Anillado de Aves (CENAA), Universidad Nacional de Tucumán, Argentina. Another important source of data was the Centro de Rehabilitación de Aves Rapaces (CeRAR). We used mist nets and balchatri traps to catch birds during CENAA campaigns in central and northern Argentina, in order to band them and study their migration. During fieldwork, we measured total body length, bill length (exposed culmen and culmen with cere), wing chord, and body mass of each bird. The biometric information of raptors in Argentina is scarce. These measurements can therefore be useful for a variety of topics such as conservation, ecology, biology, taxonomy and phylogeny.

The drivers of tree cover expansion: Global, temperate, and tropical zone analyses Rudel, Thomas K.; Sloan, Sean; Chazdon, Robin; Grau, Hector Ricardo This paper uses new, high resolution satellite-derived data to explore recent cross-national differences in expanding tree cover. Increases in tree cover have concentrated in nations with recent histories of extensive deforestation, humid climates, high crop yields, and small numbers of farm workers. The associations of expanded tree cover with high yields for cereal crops and small populations of cultivators suggests a dynamic, sometimes referred to as a forest transition, in which urbanization and industrialization promote a long-term expansion in tree cover on certain types of land. The association of tree cover gains with tree cover losses and humid climates suggests a second dynamic, a churning, treadmill-like production of wood products from lands subjected to recurring harvests of wood products followed by tree cover gains in the recently harvested areas. The forest transition dynamic suggests that many smallholders would allow tree cover to expand on their lands if payments for environmental services were available. The salience of the treadmill dynamic of tree cover losses followed by tree cover gains underscores the importance of questions about the implications of commercial tree monocultures for biodiversity, carbon sequestration, and social justice.

Enrique Sparn (1889-1966). Sus aportes a la bibliografía geológica; Enrique Sparn (1889-1966). His contribution to the bibliography of geology Silva, Emilia; Alonso, Ricardo Narciso Heinrich Max Sparn (1889-1966) castellanizó su nombre alemán por el de Enrique Sparn, con el cual firmó su obra bibliográfica en la Argentina. Desde 1918 hasta 1954 se desempeñó en la Academia Nacional de Ciencias de Córdoba (ANCC) donde tuvo una extensa carrera como bibliotecario, secretario y miembro de pleno derecho de la Academia. Asimismo fue miembro del Instituto de Bibliografía Regional del Departamento de Filosofía de la Universidad de Buenos Aires y Jefe de la Comisión de Coordinación de todas las bibliotecas de la Universidad de Córdoba. No solo fue un gran bibliotecario sino que además se destacó como bibliógrafo científico, llevando a cabo minuciosas investigaciones sobre los temas importantes de la época los que le permitieron realizar contribuciones científicas con aportes estadísticos, sociológicos, culturales y educativos. Se destacó por haber compilado abundante literatura de los siglos XIX y XX, especialmente sobre geología, mineralogía, paleontología, ciencias naturales e historia de las ciencias. Sus publicaciones suman un centenar de trabajos especialmente en actas, boletines y misceláneas de la ANCC. Se lo propone en este trabajo como el padre de la bibliografía científica argentina.; The German librarian Heinrich Max Sparn (1889-1966), as Enrique Sparn, made a very important contribution to Argentinean bibliography during his extensive work at Córdoba National Academy of Sciences (ANCC), from 1918 to 1954. Sparn had written around 100 papers that were published in bulletins, proceedings and special volumes of the ANCC related to geology, mineralogy, paleontology, natural sciences, and history of sciences. He made all kinds of compilations of scientific bibliography, especially of the19th and 20th centuries. Furthermore, Sparn carried out research related to bibliographic aspects as well as statistical, sociological, cultural and academic analysis. Sparn achieved the position of director of the ANCC Library and he was also Secretary and full member of this prestigious institution that was founded by President Domingo Faustino Sarmiento. In this paper we would like to propose him as the father of Argentinean Scientific Bibliography.

Postglacial vegetation and climate changes inferred from a peat pollen record in the Río Pipo valley, southern Tierra del Fuego; Cambios de la vegetación y clima postglacial inferidos a partir de un registro polínico de una turbera en el Valle del Río Pipo, sur de Tierra del Fuego Borromei, Ana Maria; Musotto, Lorena Laura; Coronato, Andrea Maria Josefa; Ponce, Juan Federico; Pontevedra Pombal, Xavier El análisis polínico de la turbera Cañadón del Toro (54° 49’ 36” S; 68° 27’ 36” W), ubicada en un valle interior de los Andes Fueguinos, brindó información sobre los cambios de vegetación y clima durante los últimos 13.500 años. Los resultados indicaron el desarrollo postglacial de una vegetación de estepa bajo condiciones más secas y frías que las actuales, seguidas por la expansión de Nothofagus en el valle con posterioridad a los 10.350 años cal. AP. Durante este período, la predominancia del ecotono bosque-estepa sugiere condiciones más cálidas y un incremento en la disponibilidad de humedad. Alrededor de los 6.700 años cal. AP, el bosque cerrado de Nothofagus se expande bajo condiciones frías y húmedas. El ambiente de la turbera también refleja el paulatino incremento de humedad efectiva cambiando desde una turbera minerotrófica de Cyperaceae a una ombrotrófica de Sphagnum.; The pollen analysis from Cañadón del Toro peat bog (54° 49’ 36” S; 68° 27’ 36” W), located in an interior valley of the Fuegian Andes, provides information about vegetation and climate changes during the last 13,500 years. The results indicate the postglacial development of steppe-like vegetation under drier and colder conditions than today, followed by the expansion of Nothofagus into the valley after 10,350 cal. yr BP. At this time, the predominance of a forest-steppe ecotone suggests warm conditions and an increase in moisture availability. By about 6,700 cal. yr BP, the closed-canopy Nothofagus forest spread under cold and wet conditions. The mire environment also reflects the increasing trend of effective moisture changing from an initial minerotrophic Cyperaceae fen to an ombrotrophic Sphagnum bog development.

Co-infection with Mycobacterium bovis does not alter the response to bovine leukemia virus in BoLA DRB3*0902, genetically resistant cattle Lützelschwab, Claudia María; Forletti, Agustina; Cepeda, Rosana Esther; Esteban, Eduardo Néstor; Confalonieri, Omar; Gutiérrez, Silvina Elena High proviral load (HPL) profile in bovine leukemia virus infected animals poses increased risk of transmission, and development of HPL or low proviral load (LPL) profile may be attributed to host genetics. Genetic resistance and susceptibility has been mapped to the Major Histocompatibility Complex class II DRB3 gene (BoLA DRB3). The aim of this work was to determine the effect of Mycobacterium bovis infection on certain virological and host immunological parameters of BLV experimental infection. Twenty-six Argentinian Holstein calves carrying the resistance-associated marker allele BoLA DRB3*0902, susceptibility-associated marker allele BoLA DRB3*1501, or neutral BoLA DRB3 alleles, exposed to M. bovis were used. Twenty calves were inoculated with BLV, three were naturally infected and other three were BLV-negative. Seven from twenty six (27%) of the animals resulted positive to the PPD test. The proviral load, absolute leukocyte and lymphocyte counts, time to seroconversion, antibody titer against BLV, and viral antigen expression in vitro at various times post inoculation were determined and compared between PPD + and PPD − animals. From a total of 23 BLV positive animals (naturally and experimentally infected), 13 (56.5%) developed HPL, and 10 (43.5%) developed LPL. None of the investigated parameters were affected by infection with M. bovis. We concluded that the ability of cattle carrying resistance-associated marker to control BLV and to progress towards a LPL phenotype was not altered by M. bovis co-infection.

Control tafonómico y geoquímico del registro Camelidae en base a difractometría de RX (DRX): Puna Austral Argentina (Holoceno Temprano y Tardío); Taphonomic and geochemical controls on camelidae record using x-ray diffraction (XRD): Argentine Southern Puna (Early and Late Holocene) Urquiza, Silvana Valeria El registro óseo faunístico exhibe una preservación diferencial en los sitios arqueológicos a cielo abierto y aleros de la Puna Austral de Argentina. Dada esta variabilidad, y con el fin de establecer los principales factores que actuaron como elementos de control tafonómico sobre los huesos y piezas dentales de Camelidae (ca. 9000 años AP hasta Período Republicano), se realizaron estudios petrográficos y geoquímicos aplicando DRX. Las muestras presentan un comportamiento diagenético diferente, siendo los huesos más sensibles que los esmaltes dentales a las variaciones en la composición química. En los sitios aleros la diagénesis fue más intensa, donde la DRX ósea muestra picos de Ca₅(PO₄)₃(OH) con reemplazo mineral de KCl para el Holoceno temprano. En el Holoceno tardío, para el alero y para los sitios a cielo abierto se observan picos de PH₃. El material óseo alterado térmicamente y las partes dentales no muestran reemplazos minerales.; In order to assess the variability in preservation of the bone record from the ca. 9000 BP to recent date were conducted several X-ray Diffraction (XRD) and petrographical analysis on samples from several archaeological sites from the Southern Argentine Puna. The samples are composed of bone and teeths from open-air and overhang sites. Samples display variability in diagenetic pathways, being bones more sensitive than teeths to suffer chemical exchanges. In overhang sites diagenetic processes were more intense, displaying XRD high values of Ca5 (PO4)3(OH) and mineral exchange of KCl to the Early Holocene. In Late Holocene, in open-air and overhang sites were observed high values of PH3. Thermal altered bones and teeth fragments have not displayed mineral exchanges.

Tailoring biomass-based activated carbon for CH4 storage by combining chemical activation with H3PO4 or ZnCl2 and physical activation with CO2 Prauchner, Marcos Juliano; Sapag, Manuel Karim; Rodríguez Reinoso, Francisco Coconut shell-based activated carbons intended for CH4 storage were prepared by chemical activation with H3PO4 or ZnCl2 and/or physical activation with CO2. Efforts were focused to establish relationships among the activation procedure, the textural and physical-chemical properties of the resulting materials and their volumetric CH4 uptake. The best results were achieved by using the combination of a relatively soft chemical activation with H3PO4 or ZnCl2, just the sufficient to minimize the presence of macropores originated from the botanical structure of the precursor, followed by physical activation with CO2 to develop a narrow pore size distribution mainly located around the optimum pore diameter/width for CH4 storage. This combined methodology permitted to obtain excess volumetric CH4 adsorption capacities as high as 94, 148 and 145 V/V for granular, powdered/compressed and monolithic carbons, respectively. The corresponding total CH4 storing capacities were estimated to be 102, 165 and 163 V/V. It is worthy to highlight that the precursor was a low cost and abundant agricultural by-product, which is very important for large-scale applications such as gas transportation and gas storage in vehicular fuel tanks.

Aportes de la economía de la salud al estudio de la transición de riesgos sanitarios: el caso de la obesidad; Health economics contribution to the study of sanitary risk transition: the case of obesity Temporelli, Karina Luján; Monterubbianesi, Pablo Daniel Epidemiological, demographic and socio-economic transformations in recent decades pose new challenges to health systems. In analyzing the causes of death in the world it is found that four are the most prevalent: cardiovascular disease, cancer, chronic respiratory diseases and diabetes. In turn, these diseases are caused largely by three risk factors: smoking, physical inactivity and poor diet. The economic perspective helps to understand and predict human behavior in a wide range of situations, constituting a vital approach for the design of institutions and policies that fit the needs of populations. Given the wide spread of overweight and obesity, related to unhealthy behaviors, the overall objective of this work is to conduct a systematic review of the main theoretical and empirical contributions that have been made since the health economy for the explanation of this phenomenon.

"Revolución productiva", apertura externa y crisis de la pesca: la política pesquera bajo el gobierno de Menem (1989-1997); "Productive revolution", external opening and crisis of fishing: the fishing policy during the Menem government (1989-1997) Colombo, Guillermo Después de alcanzar niveles record en los volúmenes de exportaciones de productos pesqueros, el año 1997 mostró otra cara de esa realidad. Si por un lado la orientación de la política pesquera aseguró el incremento de la explotación mediante el crecimiento sostenido del esfuerzo pesquero, favoreció la apertura a flotas extranjeras y potenció la orientación exportadora de commodities. Por otro lado, produjo una crisis de sobrepesca. Intentamos presentar aquí el desarrollo del proceso mediante el cual se fueron delineando las políticas pesqueras del gobierno de Menem. Procuramos demostrar que con la puesta en marcha del Plan de Convertibilidad, encarecieron los productos exportables argentinos en el mercado mundial, los mecanismos para sostener la rentabilidad en la industria pasaron por incrementar la productividad del capital a partir de facilitar el acceso a tecnología, desarrollar sociedades mixtas con capitales extranjeros y reducir los costos del trabajo.; After the volume of exports of fishing products reached record levels, the year 1997 showed another side to that reality. If, on the one hand, the fishing policy's orientation assured the increase of exploitation through sustained growth of fishing efforts, encouraged the opening to foreign fleets and potentiated the commodity-exporting orientation, on the other hand, it produced a crisis of overfishing, primarily of the hake hubbsi fishing. In this paper present a summary of the development of the process by which the fishing policies of the Menem government were outlined. We aim to demonstrate that with the start of the Convertibility Plan, which led the prices of Argentine export products to rise in the world market, the mechanisms to sustain profitability in the industry were raising the productivity of the capital by way of facilitating access to technology, developing mixed societies with foreign capitals and reducing the costs of labor. Our sources are different newspaper reports published in La Capital of Mar del Plata, as well as national newspapers, reports, trade documents, magazines, collective conventions, laws and decrees.

Historical balance of nitrogen, phosphorus, and sulfur of the Argentine Pampas; Balance histórico de nitrógeno, fósforo y azufre de la región pampeana Alvarez, Roberto; Steinbach, Haydee Sara; de Paepe, Josefina Se realizó un balance de superfice de nitrógeno (N), fósforo (P) y azufre (S) para la Región Pampena desde 1870 a 2010, período en que se produjo la expansión agrícola en la región. Para N se computaron como entradas el aporte atmósferico, la fijación simbiótica y la fertilización. Las salidas fueron la exportación en grano y productos animales. Para P y S el balance incluyó como entradas el aporte atmosférico y la fertilización y como salidas las mismas que para N. El balance se calculó en forma anual y acumulada y también se calculó la relación salida/entrada anual. Las bases de datos fueron censos nacionales y estadísticas oficiales para estimar las salidas y se hicieron estimaciones de aporte atmosférico, fijación simbiótica y consumo de fertilizantes. La entrada de N fue de 202 Mt, siendo el aporte atmósférico (36%) y la fijación simbiótica (58%) los componentes principales. La salida fue de 76 Mt, con la exportación en grano como principal factor (83%); resultando en un balance positivo de 126 Mt. Este flujo equivale a un cuarto del stock de N de los suelos hasta 1 m. Otros estudios mostraron que no se produjeron cambios en los stock de N pampeano entre 1960-80 y 2007-2008, período durante el cual el balance de N fue de +52 Mt. En consecuencia, se estimaron pérdidas gaseosas o por lixiviación durante este lapso de 26 kg ha-1 año-1. Para fósforo la entrada fue 4,2 Mt, con mayor peso del componente fertilizantes (67%) y la salida de 12,2 Mt, generado sobre todo por la cosecha de granos (76%), determinando un balance negativo de -8,0 Mt. La entrada de azufre fue de 3,9 Mt, principalmente generada por la atmósfera (81%) y la salida de 5,6 Mt, debido sobre todo a la exportación en grano (82%), con un balance negativo de -1,7 Mt. Estos resultados indican pérdida de P y S desde las reservas de los suelos. La relación salida/entrada de N pasó de 0,2 a 0,7 en el lapso estudiado, mientras que para P y S ha sido mayor a 1 desde hace décadas.; A surface balance for nitrogen (N), phosphorus (P), and sulfur (S) was performed for the Argentine Pampas during the 1870-2010 time interval, comprising the agricultural expansion period in the region. Nitrogen inputs accounted in the balance were atmospheric deposition, symbiotic fixation, and fertilization. Outputs included were grain harvest and livestock products. P and S balances included atmospheric deposition and fertilization as inputs and the same outputs than in the case of N balance. Annual and cumulative balances were calculated and also an annual output/input ratio. National information and official statistics were used to determine the nutrient outputs whereas atmospheric deposition, symbiotic fixation, and fertilizer inputs were estimated. Cumulative N input was of 202 Mt, atmospheric deposition (36%) and symbiotic fixation (58%) represented the main components. The output was of 76 Mt, with grain harvest as main factor (83%), thus resulting in a positive N balance of 126 Mt. This nutrient flow is equivalent to one quart of the soil N stock to 1 m depth. As previous studies showed that soil N stock did not changed between 1960-1980 and 2007-2008, period during which a positive N balance of 52 Mt was calculated, this resulted in a loss of 26 kg ha-1 yr-1 due to gas emissions and leaching in recent decades. Phosphorus input was 4.2 Mt, mainly explained by fertilization (67%), and the output was 12.2 Mt, generated mainly by grain harvest (76%), which determined a negative balance of -8.0 Mt. Sulfur input was 3.9 Mt, mainly determined by atmospheric deposition (81%) and the output was 5.6 Mt, mainly due to grain harvest (82%) resulting also in a negative balance of -1.7 Mt. These results indicate P and S losses from soil stocks. The N output/input ratio varied from 0.2 to 0.7 along the study period, while the P and S ratios have been higher than 1 since decades.

Scinax exiguus de Araujo Vieira, Katyuscia Artículo que menciona la taxonomía Scinax exiguus

Influence of finite conductivity on the excitation of phase resonances in metallic surfaces with cavities of circular cross sections Valencia, Claudio Ismael; Skigin, Diana Carina Phase resonances have been investigated in the last few years, not only because of their striking features, such as extremely high quality factor and huge enhancement of the electromagnetic field inside cavities/grooves, but also for their promising applications. However, taking into account that these resonances are more efficiently excited in highly conducting structures, most of the studies have been devoted to explore this phenomenon at wavelengths in the infrared or larger, using different approaches for the boundary conditions. In this paper, we investigate the validity of the perfect conductor approximation and the surface impedance boundary condition to appropriately represent the electromagnetic response of a metallic surface comprising a finite number of subwavelength cavities of circular cross sections. Far- and near-field plots are shown and analyzed in order to investigate the validity ranges and discuss to what extent phase resonances can be excited at shorter wavelengths in these structures.

Neotectónica y volcanismo monogenético cuaternario sobre el segmento central del lineamiento Calama Olacapato Toro, NO Argentino; Neotectonics and Quaternary monogenetic volcanism above the central segment of the Calama Olacapato Toro lineament, NW Argentina Seggiaro, Raul Eudocio; Guzman, Silvina Raquel; Pereyra, Ricardo; Coppolecchia, Mariana; Cegarra, Marcelo Ignacio Se describen dos secciones de depósitos cuaternarios en los alrededores de San Antonio de los Cobres en la Puna salteña que permiten relacionar la neotectónica del tramo central del lineamiento Calama - Olacapato - Toro con el magmatismo básico cuaternario emitido en la región. La sección del paraje Corte Blanco, al este de San Antonio de los Cobres , está integrada por depósitos de abanicos aluviales con abundante aporte de cenizas basálticas y la del área de Chorrillos, al OSO de San Antonio de los Cobres, por una sucesión de depósitos de oleadas piroclásticas e ignimbritas de composición basáltica con evidencias de interacción agua-magma. La composición mineral del material piroclástico es similar a la que registran las lavas de los volcanes monogenéticos cuaternarios Negro de Chorrillos y San Gerónimo, emplazados en las cercanías. Ambas secciones presentan evidencias de licuefacción (interpretadas aquí como sismitas) y se encuentran afectadas por fallas transcurrentes e inversas, oblicuas al rumbo NO-SE del lineamiento Calama - Olacapato - Toro y consistentes con una cinemática regional sinestral. Finalmente, en base a las relaciones de campo observadas, se propone al volcán Negro de Chorrillos como el centro de emisión de los depósitos piroclásticos aquí descriptos y que su actividad habría sido disparada por movimientos neotectónicos.; Two sections of quaternary deposits in the vicinity of San Antonio de los Cobres at the Puna of Salta are described. These deposits allow relating neotectonics of the central segment of the Calama - Olacapato - Toro lineament with the basic quaternary magmatism erupted in the region. The paraje Corte Blanco section, east of San Antonio de los Cobres, consists of alluvial fan deposits with abundant supply of basaltic ashes and the Chorrillos area section, WNW of San Antonio de los Cobres, is represented by a succession of basaltic pyroclastic deposits of surges and ignimbrites that indicate magma-water interaction. The observed mineralogy of the pyroclastic deposits is similar to that recorded at the lavas of the quaternary monogenetic volcanoes Negro de Chorrillos and San Gerónimo, located in the vicinity. Both sections show evidences of liquefaction (interpreted here as seismites) and they are affected by transcurrent and reverse faults which are oblique to the NW-SE strike of the Calama - Olacapato – Toro lineament and are consistent with regional sinistral kinematics. Finally, on the basis of the observed field relationships, we suggest the Negro de Chorrillos volcano as the emission center of the described pyroclastic deposits and that its activity may have been triggered by neotectonic movements.

Entre la historia y la memoria: A 40 años del golpe de Estado en la Argentina; Between history and memory: 40 years after the coup d’état in Argentina Crenzel, Emilio Ariel Este artículo historiza las etapas que ha recorrido, desde hace cuarenta años cuando se produjo el último golpe de Estado, la memoria social de la dictadura y el período de violencia política que recorrió la Argentina durante los años setenta del siglo XX y su figura emblemática, los desaparecidos. Luego de trazar un perfil general de las dimensiones cuantitativas y cualitativas de la violencia de Estado que atravesó el país, se presentan los diversos contextos políticos e institucionales que signaron cada etapa por el cual atravesó la memoria social sobre este proceso, los actores principales que intervinieron en las luchas por dotar de sentido a este pasado, y las claves narrativas e interpretativas que enarbolaron en esos enfrentamientos. El artículo propone y demuestra que la historia de la memoria no es resultado directo de la voluntad del poder y que, en el caso argentino, la memoria dominante ha sido y es producto de las iniciativas de verdad y justicia que propuso, en diversas coyunturas, el movimiento de derechos humanos. Esa perspectiva fue, luego, asumida por diversas conducciones del Estado. En cambio, las propuestas de olvido e impunidad, impulsadas por diversas conducciones estatales, fueron derrotadas por la hegemonía construida, en la esfera pública, por el movimiento de derechos humanos respecto a cómo tramitar las violaciones a los derechos humanos sucedidas en el país.; This article historicizes the stages, since the last coup d’état, of the construction of the social memory of the dictatorship and the period of political violence of 1970s Argentina and its emblematic figure, the disappeared. It begins with a general outline of the quantitative and qualitative dimensions of the state violence that affected the country during this process, and goes on to examine the various political and institutional contexts that marked each stage of the social memory of these processes, the actors engaged in the struggles to give meaning to that past, and the key narrative and interpretative strategies deployed in such confrontations. The article proposes and demonstrates that the history of the social memory of the human rights abuses is not a direct result of the will of the power and. On the contrary, in the case of Argentina, the dominant memory has been and is a product of the initiatives of truth and justice proposed, at various junctures, by the human rights movement. That perspective was then taken over by various state governments. Instead, the proposals of forgetfulness and impunity, launched by several state governments were defeated by the hegemony built, in the public scenario, by the human rights movement regarding how to deal with human rights violations occurred in the country.

La Juventud Universitaria Peronista en las memorias de la militancia estudiantil reformista y marxista de la UBA, 1973 - 1976; The Juventud Universitaria Peronista in the Memories of the Reformist and Marxist student militancy of UBA, 1973-1976 Millán, Mariano Ignacio Recorremos aquí las memorias de la militancia estudiantil reformista y marxista de la UBA acerca de la Juventud Universitaria Peronista entre 1973 y 1976. Analizamos 15 testimonios orales de activistas de diversas organizaciones, en los que encontramos cuatro tópicos centrales: la JUP era una fuerza de formación reciente, con escasa trayectoria y conocimiento del medio universitario; esta agrupación carecía de un proyecto universitario consistente; tenía relaciones conflictivas con sus aliados y, con el pasaje de Montoneros a la clandestinidad, se agudizaron las tensiones con las otras agrupaciones de la UBA.; In this paper we visit the memories of the reformist and marxist student activism of the UBA about the Juventud Universitaria Peronista between 1973 and 1976. We analyzed 15 oral testimonies of activists from various organizations and found four main topics: the JUP was a organization of recent formation, with little experience and knowledge of the university environment; this group lacked a consistent university project; the JUP had conflictive relations with its allies and, with the passage of Montoneros to clandestinity, the tensions with the other militant groupings of the UBA were exacerbated.

Molecular variability and genetic relationship among Brazilian strains of the sugarcane smut fungus Benevenuto, Juliana; Longatto, Daniel P.; Reis, Gislaine V.; Mielnichuk, Natalia; Palhares, Alessandra C.; Carvalho, Giselle; Saito, Suzane; Quecine, Maria C.; Sanguino, Alvaro; Vieira, Maria Lucia C.; Camargo, Luis Eduardo A.; Creste, Silvana; Monteiro-Vitorello, Claudia B. Sporisorium scitamineum is the fungus that causes sugarcane smut disease. Despite of the importance of sugarcane for Brazilian agribusiness and the persistence of the pathogen in most cropping areas, genetic variation studies are still missing for Brazilian isolates. In this study, sets of isolates were analyzed using two molecular markers (AFLP and telRFLP) and ITS sequencing. Twenty-two whips were collected from symptomatic plants in cultivated sugarcane fields of Brazil. A total of 41 haploid strains of compatible mating types were selected from individual teliospores and used for molecular genetic analyses. telRFLP and ITS analyses were expanded to six Argentine isolates, where the sugarcane smut was first recorded in America. Genetic relationship among strains suggests the human-mediated dispersal of S. scitamineum within the Brazilian territory and between the two neighboring countries. Two genetically distinct groups were defined by the combined analysis of AFLP and telRFLP. The opposite mating-type strains derived from single teliospores were clustered together into these main groups, but had not always identical haplotypes. telRFLP markers analyzed over two generations of selfing and controlled outcrossing confirmed the potential for emergence of new variants and occurrence of recombination, which are relevant events for evolution of virulence and environmental adaptation.

Enrique Pezzoni: los casos literarios en la enseñanza de la teoría (1984-1986) Gerbaudo, Analía Isabel Este artículo gira sobre una marca de las clases de teoría literaria dictadas por Enrique Pezzoni en la carrera de letras de la Universidad de Buenos Aires entre 1984 y 1986: el trabajo con casos literarios. En primer lugar se realizan aclaraciones metodológicas respecto del análisis de clases desgrabadas. Luego se diferencian las lógicas del caso y del ejemplo literarios enmarcadas en el conjunto de sus operaciones didácticas mientras se hipotetiza sobre las tensiones del campo respecto de las que estas decisiones tomaban posición. Finalmente se recobra la relación entre teoría y literatura en su enseñanza a partir de cuentos de sus entonces alumnos, de colegas y de sus propias clases.; This article deals with one of the marks left by the literary theory lessons taught by Enrique Pezzoni in the Spanish course at Universidad de Buenos Aires between 1984 and 1986: the work on "literary cases”. First, some methodological clarifications regarding the transcribed lessons will be presented. Then, within the framework of Pezzoni’s didactics, the article will focus on the differences between the rationale of the literary "case" and the one of the "example”. At the same time, the link between the tensions within the literary field and Pezzoni’s didactics will be analyzed. Finally, the relationship between theory and literature in Pezzoni’s teaching is retraced in the testimonials from his former students, coworkers and his own lessons.

Micromamíferos del sitio arqueológico Cueva Galpón (Río Negro, Argentina): Aspectos tafonómicos y reconstrucción paleoambiental para el Holoceno Tardío en Norpatagonia oriental; Micromammals from the Cueva Galpón archaeological site (Río Negro, Argentina): Taphonomic issues and paleoenvironmental reconstruction during the late Holocene in Northeastern Patagonia Fernández, Fernando Julián; Teta, Pablo Vicente; Mange, Emiliano; Prates, Luciano Raúl; González Venanzi, Lucio; Pardiñas, Ulises Francisco J. Cueva Galpón se emplaza en la Sierra Colorada o Pailemán, en cercanías del borde oriental de la Altiplanicie del Somuncurá. Los fechados radiocarbónicos ubican el depósito arqueológico en el Holoceno tardío y lo convierten en un registro relevante para inferir la evolución ambiental del Desierto del Monte durante los últimos 3.000 años. En este trabajo se presenta el estudio de los restos de microma - míferos de Cueva Galpón (NISP = 4.594 y MNI = 566). El registro de egagrópilas preservadas y de restos óseos y dentarios con corrosión digestiva ligera indica que la acumulación fue producida mayoritariamente por Strigiformes. Se identificaron dos especies de marsupiales, siete de roedores sigmodontinos y al menos cuatro de roedores caviomorfos. Dos de los mamíferos registrados -Lestodelphys halli y Tympanoctomys kirchnerorum- se habrían extinguido regionalmente. La composición taxonómica del conjunto indica un ambiente general de Estepa Patagónica ecotonal con el Monte, posiblemente bajo un régimen de menores temperaturas y de precipitaciones levemente mayores que las actuales. Sin embargo, la ausencia en Cueva Galpón de elementos típicos de la Altiplanicie del Somuncurá, como roedores abrotriquinos o Euneomys petersoni, sugiere que las fluctuaciones ambientales del Holoceno tardío no habrían tenido la magnitud suficiente como para provocar cambios faunísticos significativos.; Cueva Galpón is located in the Sierra Colorada or Pailemán, close to the eastern edge of the Somuncurá plateau. Radiocarbon dates situate the archaeological deposit within the Late Holocene, thus the assemblage provides a relevant record for inferring environmental change in the montane desert during the last 3,000 years. For this article, micromammalian bone accumulations from the archaeological sequence (NISP = 4.594 and MNI = 566) were studied. Preserved owl pellets and skeletal specimens with light digestive corrosion, suggest that the micromammal remains were mainly deposited by strigiform birds. Two marsupials, seven sigmodontines, and at least four caviomorph species were recorded. Two of them –Lestodelphys halli and Tympanoctomys kirchnerorum- are now no longer present in the area. The taxonomic composition of the studied sample suggests an ecotonal environment between the Patagonian steppe and montane desert. It is possible that at the time, temperatures would have been lower and precipitation slightly higher than at present. However, the lack of faunal elements typical of the Somuncurá plateau, such as abrotrichines or Euneomys petersoni, indicates that Late Holocene environment

El Comité de Vigilance des Intellectuels Antifascistes, la prensa periódica y L'esprit des annés trente Pasolini, Ricardo Oscar El artículo examina el rol del Comité de Vigilancia de Intelectuales Antifascistas (C.V.I.A.) constituido en Francia en marzo de 1934. Propone la hipótesis de que la acción del C.V.I.A. fue parte de un clima mayor de renovación de la vida intelectual y política francesa de los años ‘30, y en él, ocupó un lugar importante en los debates referidos al surgimiento del fascismo; al pacifismo; a la tradición republicana y liberal; y al papel de los intelectuales en la lucha antifascista. Apoyado en el estudio de fuentes originales, se analiza la prensa periódica del período, tanto el boletín del C.V.I.A., Vigilance, como otras del campo más amplio del antifascismo cultural (Vigilance, Monde, Commune, Europe, Esprit, La Révolution Prolétariènne). Por último, se propone una reflexión historiográfica que vincula el estudio de los intelectuales con la Nueva Historia Política francesa.; The article examines the role of the Vigilance Committee of Antifascist Intellectuals (C.V.I.A.) incorporated in France in March 1934. It proposes the hypothesis that the action of C.V.I.A. was a part of a larger climate of renewal of French intellectual life and politics of the ‘30s. In that framework it occupies an important place in discussions relating to the rise of fascism; pacifism; the republican and liberal tradition; and the role of intellectuals in the antifascist struggle. It also analyzes the periodical press of cultural anti–fascism (Vigilance, Monde, Commune, Europe, Esprit, La Révolution Prolétariènne), and finally it proposes a historiographical reflection about the relationship between the study of intellectuals and New French Political History.

Adult neurogenesis beyond the niche: its potential for driving brain plasticity Sailor, Kurt A.; Schinder, Alejandro Fabián; Lledo, Pierre-Marie Adult neurogenesis emerges as a tremendous form of plasticity with the continuous addition and loss of neurons in the adult brain. It is unclear how preexisting adult circuits generated during development are capable of modifying existing connections to accommodate the thousands of new synapses formed and exchanged each day. Here we first make parallels with sensory deprivation studies and its ability to induce preexisting non-neurogenic adult circuits to undergo massive reorganization. We then review recent studies that show high structural and synaptic plasticity in circuits directly connected to adult-born neurons. Finally, we propose future directions in the field to decipher how host circuits can accommodate new neuron integration and to determine the impact of adult neurogenesis on global brain plasticity.