Ciencia y Tecnología

The invasive liriomyza huidobrensis (Diptera: Agromyzidae): Understanding its pest status and management globally

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The invasive liriomyza huidobrensis (Diptera: Agromyzidae): Understanding its pest status and management globally Weintraub, Phyllis G.; Scheffer, Sonja J.; Visser, Diedrich; Valladares, Graciela Rosa; Soares Correa, Alberto; Shepard, B. Merle; Rauf, Aunu; Murphy, Sean T.; Mujica, Norma; MacVean, Charles; Kroschel, Jürgen; Kishinevsky, Miriam; Joshi, Ravindra C.; Johansen, Nina S.; Hallett, Rebecca H.; Civelek, Hasan S.; Chen, Bing; Metzler, Helga Blanco Liriomyza huidobrensis (Blanchard) is native to South America but has expanded its range and invaded many regions of the world, primarily on flowers and to a lesser extent on horticultural product shipments. As a result of initial invasion into an area, damage caused is usually significant but not necessarily sustained. Currently, it is an economic pest in selected native and invaded regions of the world. Adults cause damage by puncturing abaxial and adaxial leaf surfaces for feeding and egg laying sites. Larvae mine the leaf parenchyma tissues which can lead to leaves drying and wilting. We have recorded 365 host plant species from 49 families and more than 106 parasitoid species. In a subset of the Argentinian data, we found that parasitoid community composition attacking L. huidobrensis differs significantly in cultivated and uncultivated plants. No such effect was found at the world level, probably due to differences in collection methods in the different references. We review the existing knowledge as a means of setting the context for new and unpublished data. The main objective is to provide an update of widely dispersed and until now unpublished data, evaluate dispersion of the leafminer and management strategies in different regions of the world, and highlight the need to consider the possible effects of climate change on further regional invasions or expansions.

Diversidad de Theridiidae (Araneae) en la reserva natural e histórica Isla Martín García (Buenos Aires-Argentina)

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Diversidad de Theridiidae (Araneae) en la reserva natural e histórica Isla Martín García (Buenos Aires-Argentina); Theridiidae (Araneae) diversity in the natural and historical reserve Isla Martín García (Buenos Aires-Argentina) López Lezama, Diana; Armendano, Andrea Viviana; Scioscia, Cristina Luisa; González, Sandra Elisa; Barneche, Jorge Adrian; Giambelluca, Luis Alberto; Reboredo, Guillermo Raul; Gabellone, Cecilia Sofía; Gonzalez, Alda Las arañas son consideradas de importancia para estudios de biodiversidad, conservación y sucesión. Presentan facilidad para dispersarse y establecerse en nuevos hábitats por lo que son buenos colonizadores de territorios insulares. La familia de arañas Theridiidae es una de las más diversas, representada por una gran variedad morfológica, etológica y ecológica. En Argentina no existen trabajos referidos a terídios de territorios insulares, por lo tanto, este trabajo consiste en el primer registro de la familia en estos ambientes. La Isla Martín García es una Reserva Natural e Histórica que se ubica en el sector noreste del Río de La Plata y presenta variabilidad ambiental y florística. Para analizar la riqueza específica, abundancia relativa y diversidad alfa y beta de terídios se realizaron muestreos durante tres años consecutivos mediante red de golpeo y muestreo manual. Se capturaron un total de 1173 individuos, pertenecientes a nueve géneros y 21 morfoespecies. La especie más abundante en todos los ambientes fue Cryptachaea hirta (61,68%). La selva fue el ambiente con mayor diversidad (H’ = 1,9, J = 0,67) (S = 16), brindando una vasta vegetación, con amplios recursos para la subsistencia de estas arañas. La isla no correspondería a un área de importancia respecto a la singularidad de especies. Se encontraron tres nuevos registros para Argentina: C. altiventer, Theridion positivum y T. tinctorium.; Spiders are considered important for studies of biodiversity, conservation and succession. They readily disperse and become established in new habitats and are considered good colonizers of islands. The Theridiidae is one of the most diverse spider families, characterized by great morphological, ethological and ecological diversity. In Argentina, there are no studies of island theridiids, therefore, this study comprises the first record of the family in these environments. The Martín García Island is a Natural and Historical Reserve located in the northwest of the La Plata River and presents environmental and floristic variability. In order to analyse the species richness, relative abundance and alpha and beta diversity of theridiids, sampling was performed over three consecutive years, by beating net and manual sampling. We recorded 1173 spiders, belonging to 9 genera and 21 morphospecies. The most abundant species in all environments was Cryptachaea hirta (61.68%) The forest was the habitat with highest diversity (H’ = 1.9, J = 0.67) (S = 16), providing extensive vegetation, with vast resources for the survival of these spiders. The island is not an important area with regard to species singularity. Three new records were found for Argentina: C. altiventer, Theridion positivum and T. tinctorium.

Resource use associated with type 2 diabetes in Africa, the Middle East, South Asia, Eurasia and Turkey: results from the International Diabetes Management Practice Study (IDMPS)

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Resource use associated with type 2 diabetes in Africa, the Middle East, South Asia, Eurasia and Turkey: results from the International Diabetes Management Practice Study (IDMPS) Gagliardino, Juan Jose; Atanasov, Petar K.; Chan, Juliana C. N.; Mbanya, Jean C.; Shestakova, Marina V; Leguet Dinville, Prisca; Annemans, Lieven Type 2 diabetes (T2D) and its complications form a global healthcare burden but the exact impact in some geographical regions is still not well documented. We describe the healthcare resource usage (HRU) associated with T2D in Africa, the Middle East, South Asia, Eurasia and Turkey.

Ultramafic rocks in the north patagonian andes: Is their emplacement associated with the neogene tectonics of the liquiñe-ofqui fault zone?

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Ultramafic rocks in the north patagonian andes: Is their emplacement associated with the neogene tectonics of the liquiñe-ofqui fault zone?; Rocas ultramáficas en los Andes norpatagónicos: ¿está su emplazamiento asociado a la actividad tectónica Neógena de la Zona de Falla Liquiñe-Ofqui? Hervé, Francisco; Fuentes, Francisco; Calderón, Mauricio; Fanning, Mark; Quezada, Paulo; Pankhurst, Robert; Rapela, Carlos Washington En la vertiente occidental de los Andes norpatagonicos de Chiloé continental (41°44’-42°12’ S) afloran serpentinitas y harzburgitas frescas o parcialmente serpentinizadas. Estas rocas están espacialmente asociadas con rocas metamórficas de bajo grado que contienen circones detríticos Cenozoicos. Estas rocas metamórficas, junto a metasedimentos Devónicos, han sido mapeados previamente como del Paleozoico superior-Triásico, una edad que no es sostenible para al menos una parte de ellos. El emplazamiento tectónico transpresivo del o de los cuerpos ultramáficos, se supone relacionado a la actividad de la Zona de Fallas Liquiñe-Ofqui, después de una fase extensional del Oligoceno tardío-Mioceno temprano en la región de antearco de los Andes actuales. La mencionada zona de fallas aparece inmediatamente al este de los afloramientos de rocas ultramáficas, y ha sido previamente interpretada como causante de una estructura de flor o hemiflor.; Serpentinites and fresh or partially serpentinized harzburgite crop out in the western slope of the North Patagonian Andes of continental Chiloé (41°44’-42°12’S). These rocks are spatially associated with low-grade metamorphic rocks containing Cenozoic detrital zircons. The metamorphic rocks, together with Devonian metasediments, have been mapped previously as Late Paleozoic-Triassic metamorfic complex, an age no longer tenable for at least part of the complex. Transpressional tectonic emplacement of the ultramafic body or bodies is thought to have been related to activity on the Liquiñe-Ofqui Fault Zone, following a late Oligocene-Early Miocene extensional phase in the forearc region of the present Andes. This fault zone occurs immediately east of the outcrops of the ultramafic rocks and has been interpreted previously as generating a hemi-flower or flower structure.

Efecto de la sincronización rítmica en pacientes con Trastorno del Espectro Autista

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Efecto de la sincronización rítmica en pacientes con Trastorno del Espectro Autista; Effect of rhythmic synchronization in patients with Autism Spectrum Disorder Diaz Abrahan, Veronika Mariana; Gentili, Sebastián; Justel, Nadia Las investigaciones realizadas en los últimos años ponen el énfasis en la relación existente entre las alteraciones sensoriales y del movimiento en los trastornos del espectro autista, adjudicando el déficit a una alteración a nivel cortical y a una disfunción cerebelosa temprana. Desde el campo de la musicoterapia, se ha abordado el déficit sensorio-motor a través de técnicas para la compensación y/o rehabilitación de funciones cognitivas. El propósito de este trabajo es presentar un abordaje destinado apacientes con Trastorno del Espectro Autista (TEA), basado en el beneficio potencial de la sincronicidad rítmica sobre la regulación sensoriomotriz y sus consecuencias posteriores en las áreas deficitarias propias del cuadro. Para ello se seleccionaron 18 pacientes, entre 10 y 25 años, diagnosticados con TEA, quienes realizaron dos experiencias musicales, con y sin acompañamiento musicoterapeutico, de tres fragmentos musicales correspondientes a los géneros jazz, clásico y folclore. Los resultados indican que el acompañamiento por parte del musicoterapeuta, de ciertos fragmentos musicales, mejora el rendimiento de la sincronicidad rítmica así como también el contacto visual que el paciente realiza hacia al profesional, lo que podría brindar una posible intervención para el abordaje de los aspectos en déficit en el TEA.; Research in recent years emphasize the relationship between sensory and movement disorders in autism spectrum disorders, adjudging the deficit to altered cortical level and at an early cerebellar dysfunction. From the field of music therapy, it has addressed the sensorimotor deficit through techniques for compensation and / or rehabilitation of cognitive functions. The purpose of this paper is to present an approach aimed at patients with Autism Spectrum Disorder (ASD), based on the potential benefit of rhythmic synchronicity on the sensorimotor regulation and its aftermath in the box own deficit areas. For this purpose 18 patients participated in this study, between 10 and 25 years, diagnosed with ASD, who performed two musical experiences, with and without accompanying music therapy, three pieces of music corresponding to jazz, classical and folk genres were selected. The results indicate that the accompaniment by the music therapist, of certain musical fragments, improves the performance of rhythmic synchronicity well as eye contact the patient makes to the professional, which could provide a possible intervention for addressing aspects deficits in ASD.

Etnografía y antropología en Argentina: propuestas para la reconstrucción de un programa de investigación de lo universal

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Etnografía y antropología en Argentina: propuestas para la reconstrucción de un programa de investigación de lo universal; Ethnography and Anthropology in Argentina: Suggestions for the Reconstruction of a Research Program on Universality; Etnografia e antropologia na Argentina: propostas para a reconstrução de um programa de pesquisa do universal Visacovsky, Sergio Eduardo Desde el comienzo de la Antropología en Argentina, etnólogos y especialistas en folklore practicaron distintas formas de trabajo de campo. Ya en los años 1960 y 1970, un conjunto heterogéneo de investigadores gestó estilos de producción próximos a la antropología social anglosajona. Pero no fue sino en los albores del siglo XXI que el trabajo de campo basado en la observación participante y la elaboración de monografías (“etnografías”) se convirtió en el modo aceptado y normal de producción de conocimiento antropológico. Por un lado, mi intención es exponer este proceso de transformación mediante un relato en el que combinaré mi experiencia como nativo de la antropología de Buenos Aires con investigación sobre la historia de la disciplina en el país. Por otro, consideraré la situación presente como una oportunidad para interrogar nuestros modos de pensar y practicar la disciplina. Sostengo que lo etnográfico ha abierto caminos sumamente valiosos para entender nuestras realidades de un modo original, pero al mismo tiempo ha postergado otros. A partir del diálogo con una literatura internacional crítica de la situación disciplinaria actual, sugiero la revisión del modo en que estamos pensando la conexión entre lo etnográfico y lo que llamo una agenda de investigación propiamente antropológica, con la finalidad de subordinar los modos de trabajo a las preguntas y teorías. A mi juicio, este camino debiera llevarnos a realizar apuestas de investigación cada vez más riesgosas, que sean verdaderos desafíos intelectuales, lo que incluye hacer del mismo enfoque etnográfico algo más incierto y experimental.; From the beginning of Anthropology in Argentina, ethnologists and folklore specialists conducted various forms of fieldwork. In the 1960s and 1970s, a heterogeneous group of researchers created renewed research styles and approaches closer to the Anglo-Saxon Social Anthropology. But only in the early twenty-first century, fieldwork based on participative observation and the creation of monographs (“ethnographies”) became the socially accepted and normal way of production of anthropological knowledge. On one hand, I intend to expose this process of transformation, combining my biographical experience as a native of Buenos Aires Anthropology, together with, research on the history of the discipline in the country. On the other hand, I will consider the current situation of Anthropology in Argentina as an opportunity to question the ways we think and carry out the discipline. I argue that the ethnographic perspective has led the way to understanding our realities in an original manner, but it has also delayed the effect of others. Through dialogue with the international critical literature which has questioned the current disciplinary situation, I suggest reviewing the way we understand the connection between ethnography and what I refer to as an anthropological agenda, so that writing and fieldwork stay subordinated to problems and theories. From my viewpoint, a new program should encourage us to conduct riskier research, which would embrace real intellectual challenges. This will naturally imply turning the very ethnographic perspective into a more uncertain and experimental approach.; Desde o começo da antropologia na Argentina, etnólogos e especialistas em folclore praticaram diferentes formas de trabalho de campo. Já nos anos 1960 e 1970, um conjunto heterogêneo de pesquisadores geraram estilos de produção próximos à antropologia social anglo-saxã. Contudo, só no início do século XXI o trabalho de campo baseado na observação participante e na elaboração de monografias (“etnografias”) se tornou o modo aceito e normal de produção de conhecimento antropológico. Por um lado, minha intenção é expor esse processo de transformação mediante um relato no qual combinarei minha experiência como nativo da antropologia de Buenos Aires com uma pesquisa sobre a história da disciplina no país. Por outro, considerarei a situação presente como uma oportunidade para interrogar nossos modos de pensar e praticar a disciplina. Sustento que o etnográfico abriu caminhos sumamente valiosos para entender nossas realidades de um modo original, mas, ao mesmo tempo, adiou outros. A partir do diálogo com uma literatura internacional crítica da situação disciplinar atual, sugiro a revisão do modo no qual estamos pensando a conexão entre o etnográfico e o que chamo uma agenda de pesquisa propriamente antropológica, a fim de subordinar as formas de trabalho às perguntas e às teorias. Ao meu ver, esse caminho deveria levar-nos a realizar pesquisas cada vez mais ousadas, que sejam verdadeiros desafios intelectuais, o que inclui fazer da mesma abordagem etnográfica algo mais incerto e experimental.

A Rapid Chemical Method for Estimating Potentially Mineralizable and Particulate Organic Nitrogen in Mollisols

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A Rapid Chemical Method for Estimating Potentially Mineralizable and Particulate Organic Nitrogen in Mollisols Martinez, Juan Manuel; Galantini, Juan Alberto The objective of this study was to obtain an indicator of labile nitrogen (N) through a cost- and time-saving procedure by evaluating the relationships among potentially mineralizable N (N0), particulate organic matter N (POM-N) and soil organic N extracted through partial soil digestion with different concentrations of sulfuric acid (H2SO4). Soil sampling (0?20 cm) was from nine fields under no-tillage. The N0 and POM-N were determined by long-term aerobic incubation and soil physical fractionation, respectively. A simple chemical method was developed by soil digestion at 100°C for 4 h with different concentrations of H2SO4 (0.1, 0.5, 1, 6, 12, and 24 mol L−1). All acid concentrations showed significant relationships with N0 as POM-N; however, the best prediction was resulted for 0.5 mol L−1 (R2 = 0.90?0.94, respectively), thus using this methodology as soil labile N indicator. This method would optimize N0 and POM-N estimation in short term and at a low cost.

Registration of "Boyero UNNE" bahiagrass

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Registration of "Boyero UNNE" bahiagrass Urbani, Mario Hugo; Acuña, Carlos Alberto; Doval, D; Sartor, Maria Esperanza; Galdeano, Florencia; Blount, A. R.; Quesenberry, K. H.; Mackowiak, Chery L.; Quarin, Camilo Luis ‘Boyero UNNE’ (Reg. No. CV-5, PI 676021) bahiagrass (Paspalum notatum Flüggé) was registered with the National Register of Plant Cultivars and the National Register of Property for Plant Cultivars, Ministry of Agriculture, Livestock Exploitations, and Fisheries of Argentina, Resolution no. 276 in August 2012 (Reg. No. 3213) and released by the National University of the Northeast (UNNE), Faculty of Agricultural Sciences (FCA), Corrientes, Argentina. Boyero UNNE is a tetraploid, highly apomictic F1 hybrid developed between an experimentally obtained female parent, reproducing sexually, and an apomictic, wild bahiagrass genotype. It is the first registered cultivar of a tetraploid apomictic P. notatum developed by breeding through a sexual × apomictic hybridization scheme, exploiting apomixis and plant selection in the F1 progeny. The new cultivar has a more upright growing habit than tetraploid bahiagrass cultivars currently in use or wild tetraploid biotypes. It can produce approximately 19% more forage dry matter than its apomictic male parent, largely exceeding (20–51%) the wild bahiagrass type currently found in natural pasturelands of northeastern Argentina, and it produced 4 to 26% more than the cultivar Argentine at three locations in Florida, USA.

The shade-avoidance syndrome: Multiple signals and ecological consequences

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The shade-avoidance syndrome: Multiple signals and ecological consequences Ballare, Carlos Luis; Pierik, Ronald Plants use photoreceptor proteins to detect the proximity of other plants and to activate adaptive responses. Of these photoreceptors, phytochrome B (phyB), which is sensitive to changes in the red (R) to far-red (FR) ratio of sunlight, is the one that has been studied in greatest detail. The molecular connections between the proximity signal (low R:FR) and a model physiological response (increased elongation growth) have now been mapped in considerable detail in Arabidopsis seedlings. We briefly review our current understanding of these connections and discuss recent progress in establishing the roles of other photoreceptors in regulating growth-related pathways in response to competition cues. We also consider processes other than elongation that are controlled by photoreceptors and contribute to plant fitness under variable light conditions, including photoresponses that optimize the utilization of soil resources. In examining recent advances in the field, we highlight emerging roles of phyB as a major modulator of hormones related to plant immunity, in particular salicylic acid and jasmonic acid (JA). Recent attempts to manipulate connections between light signals and defence in Arabidopsis suggest that it might be possible to improve crop health at high planting densities by targeting links between phyB and JA signalling.

Apertura FSTics 2016 - Sistema de Alerta Temprana de Catástrofes

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El Ministerio de Ciencia, Tecnología e Innovación Productiva (MinCyT), a través de la Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), y en particular a través del Fondo Argentino Sectorial (FONARSEC), convoca a consorcios asociativos público-privados (CAPP) para la presentación de proyectos orientados a avanzar en la detección temprana y la gestión de fenómenos meteorológicos, poniendo a disposición una herramienta que pueda ser utilizada para generar pronósticos numéricos a muy corto plazo de la evolución de la convección profunda en la atmósfera. Por otra parte, la metodología propuesta servirá para indagar en mayor profundidad sobre los procesos asociados al inicio de la convección en nuestra región y a su posterior evolución, lo cual contribuirá a un mejor entendimiento de los fenómenos de tiempo severo asociados a convección que afectan a nuestro país.

PICT 2016 - Proceso de reconsideración

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El Fondo para la Investigación Científica y Tecnológica (FONCYT) anuncia los resultados del proceso de reconsideración para la convocatoria PICT 2016 mediante Resolución de Presidencia de Agencia N° 566/16 con fecha 26/12/2016.

A study of debris and wear damage resulting from fretting of Incoloy 800 steam generator tubes against AISI Type 304 stainless steel

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A study of debris and wear damage resulting from fretting of Incoloy 800 steam generator tubes against AISI Type 304 stainless steel Soria, Sergio Raul; Tolley, Alfredo Juan; Yawny, Alejandro Andres Wear damage and resulting triboparticles corresponding to fretting of Incoloy 800 steam generator tubes against AISI 304 pads were characterized in experiments performed in air at room temperature in a 90° cross cylinder configuration. Relative displacement amplitudes of 70, 116 and 160 µm under a normal contact load of 35±4 N were considered in experiments performed up to 106cycles. The topography and dimensions of the resulting scars on surfaces were characterized using light microscopy and scanning electron microscopy. The morphology, size and crystal structure of the debris detached during the test were determined by transmission electron microscopy and energy dispersive X-ray spectroscopy. It was verified that gross slip was the prevailing running fretting condition in all cases, while the characteristics of the scar surface layer and the corresponding wear mechanisms were found to depend on the amplitude of the relative displacement. Debris consisted in agglomerations of nano-crystalline oxide particles sized between 5 and 20 nm. The crystal structure of debris was found to depend on the displacement amplitude. For 70 µm and 116 µm, NiO, (Fe,Cr)2O3 and (Ni,Fe)(Fe,Cr)2O4 were found, while the formation of (Fe,Cr2)O3 and (Ni, Fe)(Fe,Cr)2O4 was verified for a displacement amplitude of 160 µm.

Localidades típicas de micromamíferos en Patagonia: el viaje de Hatcher a la meseta del lago Buenos Aires, Santa Cruz, Argentina

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Localidades típicas de micromamíferos en Patagonia: el viaje de Hatcher a la meseta del lago Buenos Aires, Santa Cruz, Argentina; Type localities of small mammals in Patagonia: Hatcher’s expedition to the Meseta del Lago Buenos Aires, Santa Cruz, Argentina Christie, Miguel I.; Pardiñas, Ulises Francisco J. En base a la reconstrucción del viaje efectuado en 1898 por J. B. Hatcher y E. A. Colburn hacia la Meseta del lago Buenos Aires y sectores adyacentes (Santa Cruz, Argentina), se discute la procedencia geográfica de los holotipos de los roedores Eligmodontia morgani J. Allen, 1901 (Cricetidae) y Ctenomys colburni J. Allen, 1903 (Ctenomyidae). Para ambos taxones se restringen sus localidades típicas, cuya ubicación ha sido objeto de debate. Además, se refina información geográfica lograda por esta dupla de naturalistas para otros mamíferos patagónicos, en especial el ciervo Hippocamelus bisulcus.; On the basis of a reconstruction of J. B. Hatcher y E. A. Colburn’s 1898 expedition to Patagonia’s Lake Buenos Aires region and intervening areas (Santa Cruz, Argentina), we discuss the geographic provenance of the holotypes of the rodents Eligmodontia morgani J. Allen, 1901 (Cricetidae) and Ctenomys colburni J. Allen, 1903 (Ctenomyidae). Type localities for both taxa have been the subject of debate, and new information allows us to restrict their location. Additionally, we provide geographic information about other mammals documented by them, most notably the Huemul (Hippocamelus bisulcus).

Apertura Desarrollos satelitales

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El Ministerio de Ciencia, Tecnología e Innovación Productiva (MinCyT), a través de la Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), y en particular a través del Fondo Argentino Sectorial (FONARSEC), convoca a consorcios asociativos público-privados (CAPP) para la presentación de proyectos orientados a fomentar la industria satelital nacional a través de la generación y aumento de las capacidades científicas e industriales para la fabricación nacional de partes satelitales, dentro del marco del Plan Espacial Nacional.

INNOVACUA 2016

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La Agencia Nacional de Promoción Científica y Tecnológica (ANPCYT), a través del Fondo Argentino Sectorial (FONARSEC), convoca a la presentación de propuestas para la nueva convocatoria INNOVACUA 2016.

El Directorio de Agencia cerró el año en una empresa modelo

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Con motivo de la última reunión de 2016, autoridades de la Agencia Nacional de Promoción Científica y Tecnológica visitaron la planta industrial de Lácteos Vacalín, ubicada en la localidad bonaerense de Bartolomé Bavio, que obtuvo este año financiamiento para la realización de cuatro proyectos de innovación productiva.

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