3D hydrodynamic numerical models for nebulae around runaway Wolf-Rayet stars

We present 3D hydrodynamical simulations of the circumstellar bubble from a Wolf-Rayet runaway star. In the models two properties were taken into account: (a) the proper motion of the central star through the interstellar medium (ISM) and (b) the evolution of the stellar wind from the red supergiant (RSG) stage to the Wolf-Rayet (WR) stage. From the hydrodynamic results synthetic X-ray maps in the [0.3 − 1.2] keV energy range were computed. These maps show that the bubble morphology is affected by the stellar motion, producing a bow shock in the RSG stage that can explain the limb-brightened morphology observed. Additionally, these synthetic maps show filamentary and clumpy appearance produced by instabilities triggered from the interaction between the WR wind and the RSG shell. It was found that these types of collisions can explain the origin of the X-ray emission observed in the nebulae of Wolf- Rayet stars.Fil: Reyes Iturbide, J.. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México. Tecnológico de Estudios Superiores de Tianguistenco; MéxicoFil: Velázquez, Pablo F.. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; MéxicoFil: Rosado, M.. Universidad Nacional Autónoma de México. Instituto de Astronomía; MéxicoFil: Schneiter, Ernesto Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Ramírez Ballinas, I.. Universidad Nacional Autónoma de México. Instituto de Astronomía; Méxic

Movilidad Social Intergeneracional de los inmigrantes en Mendoza

Para pensar el proceso de especulación financiera que se inició con la dictadura militar y cerró con el neoliberalismo menemista de la década del `90, ha sido más que relevante la llegada de contingentes de países limítrofes en el transcurso de una creciente precarización laboral. Es de nuestro interés indagar en el movimiento social intergeneracional de los dos mayores colectivos que habitan la provincia de Mendoza, hablamos de chilenos y bolivianos, para lo que tomaremos dos variables fundamentales: el estrato ocupacional y el nivel educativo. Considerando, con lo descripto arriba, la forma en que estas comunidades determinan la economía de la provincia y de cómo se incorporan en el mercado laboral y en las instituciones educativas locales. Todo ello lo vuelve un tema fundamental de interés político y en consecuencia para la ciencia que nos ocupa.Instituto de Investigaciones en Humanidades y Ciencias Sociale

Red de monitoreo de eventos hidrológicos extremos en la vertiente sur del Río Salado, provincia de Buenos Aires

Se ha demostrado que los eventos hidrológicos extremos en la provincia de Buenos Aires constituyen una característica de la misma, considerando los balances de agua en el suelo (zona no saturada) de vital importancia. Estos balances indican que la cuenca del Río Salado es la más sensible a los excesos hídricos, y la región sudoeste de la provincia, la más perjudicada durante las deficiencias hídricas (Scarpati y Capriolo, 2013). Por ello toman importancia las tareas de prevención como son las obras civiles y las redes de monitoreo de las condiciones principales que intervienen en este tipo de fenómenos, con el fin de dar alerta a las autoridades competentes ya sea en períodos de inundaciones o de sequías. Una red de monitoreo comprende las actividades relativas a la recolección de datos, diseñados y procesados con un objetivo definido (Guía de prácticas hidrológicas, 1994). Consiste en un arreglo de sensores que conforman las estaciones y en un sistema de comunicación que permite la transmisión de los datos a los centros de monitoreo. Su principal función es el estudio de procesos fundamentales que se dan en el medio ambiente, como así también proveer alerta de amenazas, como por ejemplo de inundaciones, erupciones volcánicas, terremotos, tsunamis, etc. (Hart y Martinez, 2006). El monitoreo y la recolección de datos hidro-meteorológicos es importante debido a que los eventos naturales como precipitaciones, temperaturas, velocidades del viento, entre otros, son irrepetibles en la naturaleza (Fattorelli y Fernández, 2011). El diseño de una red hidro-meteorológica comprende principalmente el conocimiento hidrológico y climático de la zona en la cual se establecerá

Diagnostic investigation of 100 cases of abortion in sheep in Uruguay: 2015-2021

The aim of this work was to identify causes of abortion through laboratory investigations in sheep flocks in Uruguay. One hundred cases of abortion, comprising 58 fetuses, 36 fetuses with their placentas, and 6 placentas were investigated in 2015-2021. Cases were subjected to gross and microscopic pathologic examinations, and microbiological and serological testing for the identification of causes of abortion, including protozoal, bacterial, and viral pathogens. An etiologic diagnosis was determined in 46 (46%) cases, including 33 (33%) cases caused by infectious pathogens, as determined by the detection of a pathogen along with the identification of fetoplacental lesions attributable to the detected pathogen. Twenty-seven cases (27%) were caused by Toxoplasma gondii, 5 (5%) by Campylobacter fetus subspecies fetus, and 1 (1%) by an unidentified species of Campylobacter. Fourteen cases (14%) had inflammatory and/or necrotizing fetoplacental lesions compatible with an infectious etiology. Although the cause for these lesions was not clearly identified, T. gondii was detected in 4 of these cases, opportunistic bacteria (Bacillus licheniformis, Streptococcus sp.) were isolated in 2 cases, and bovine viral diarrhea virus 1 subtype i (BVDV-1i) was detected in another. Campylobacter jejuni was identified in 1 (1%) severely autolyzed, mummified fetus. BVDV-2b was identified incidentally in one fetus with an etiologic diagnosis of toxoplasmosis. Microscopic agglutination test revealed antibodies against ≥1 Leptospira serovars in 15/63 (23.8%) fetuses; however, Leptospira was not identified by a combination of qPCR, culture, fluorescent antibody testing nor immunohistochemistry. Neospora caninum, Chlamydia abortus, Chlamydia pecorum, Coxiella burnetii and border disease virus were not detected in any of the analyzed cases. Death was attributed to dystocia in 13 (13%) fetuses delivered by 8 sheep, mostly from one highly prolific flock. Congenital malformations including inferior prognathism, a focal hepatic cyst, and enterohepatic agenesis were identified in one fetus each, the latter being the only one considered incompatible with postnatal life. Toxoplasmosis, campylobacteriosis and dystocia were the main identified causes of fetal losses. Despite the relatively low overall success rate in establishing an etiologic diagnosis, a systematic laboratory workup in cases of abortion is of value to identify their causes and enables zoonotic pathogens surveillance.INIA: PL_27 N-23398ANII: FCE_3_2018_1_148540ANII: FSA_1_2018_1_15268

Database of spatial distribution of non indigenous species in Spanish marine waters

Research in marine Spanish waters are focused on several actions to achieve an effectively management on protected areas, with the active participation of the stakeholders and research as basic tools for decision-making. Among these actions, there is one about the knowledge and control on NIS. One of its objectives is the creation of NIS factsheets, which are going to be added to the National Marine Biodiversity Geographical System (GIS) providing complementary information about taxonomic classification, common names, taxonomic synonyms, species illustrations, identification morphological characters, habitat in the native and introduced regions, biological and ecological traits, GenBank DNA sequences, world distribution, first record and evolution in the introduced areas, likely pathways of introduction, effects in the habitats and interaction with native species, and potential management measures to apply. The database will also provide data for (1) the European online platforms, (2) the environmental assessment for the Descriptor 2 (D2-NIS) of the EU Marine Strategy Framework Directive (MSFD), as well as (3) supporting decisions made by stakeholders. It is the result of extensive collaboration among scientist, manager’s and citizen science in the Spanish North-Atlantic, South-Atlantic, Gibraltar Strait-Alboran, Levantine-Balearic and Canary Islands marine divisions, providing an updated overview of the spatial distribution of relevant extended and invasive NIS of recent and established NIS introduced by maritime transport and aquaculture pathways, as well as on cryptogenic or native species in expansion due to the climatic water warming trend

La renovación de la palabra en el bicentenario de la Argentina : los colores de la mirada lingüística

El libro reúne trabajos en los que se exponen resultados de investigaciones presentadas por investigadores de Argentina, Chile, Brasil, España, Italia y Alemania en el XII Congreso de la Sociedad Argentina de Lingüística (SAL), Bicentenario: la renovación de la palabra, realizado en Mendoza, Argentina, entre el 6 y el 9 de abril de 2010. Las temáticas abordadas en los 167 capítulos muestran las grandes líneas de investigación que se desarrollan fundamentalmente en nuestro país, pero también en los otros países mencionados arriba, y señalan además las áreas que recién se inician, con poca tradición en nuestro país y que deberían fomentarse. Los trabajos aquí publicados se enmarcan dentro de las siguientes disciplinas y/o campos de investigación: Fonología, Sintaxis, Semántica y Pragmática, Lingüística Cognitiva, Análisis del Discurso, Psicolingüística, Adquisición de la Lengua, Sociolingüística y Dialectología, Didáctica de la lengua, Lingüística Aplicada, Lingüística Computacional, Historia de la Lengua y la Lingüística, Lenguas Aborígenes, Filosofía del Lenguaje, Lexicología y Terminología

Iron(III)-Promoted Aza-Prins-Cyclization: Direct Synthesis of Six-Membered Azacycles

A new iron(III) halide-promoted aza-Prins cyclization between γ,δ-unsaturated tosylamines and aldehydes provides six-membered azacycles in good to excellent yields. The process is based on the consecutive generation of γ-unsaturated-iminium ion and further nucleophilic attack by the unsaturated carbon−carbon bond. Homoallyl tosylamine leads to trans-2-alkyl-4-halo-1-tosylpiperidine as the major isomer. In addition, the alkyne aza-Prins cyclization between homopropargyl tosylamine and aldehydes gives 2-alkyl-4-halo-1-tosyl-1,2,5,6-tetrahydropyridines as the only cyclic products.Peer reviewe

Transport along the dendritic endoplasmic reticulum mediates the trafficking of GABAB receptors

In neurons, secretory organelles within the cell body are complemented by the dendritic endoplasmic reticulum (ER) and Golgi outposts (GOPs), whose role in neurotransmitter receptor trafficking is poorly understood. γ-aminobutyric acid (GABA) type B metabotropic receptors (GABABRs) regulate the efficacy of synaptic transmission throughout the brain. Their plasma membrane availability is controlled by mechanisms involving an ER retention motif and assembly-dependent ER export. Thus, they constitute an ideal molecular model to study ER trafficking, but the extent to which the dendritic ER participates in GABABR biosynthesis has not been thoroughly explored. Here, we show that GABAB1localizes preferentially to the ER in dendrites and moves long distances within this compartment. Not only diffusion but also microtubule and dyneindependent mechanisms control dendritic ER transport. GABABRs insert throughout the somatodendritic plasma membrane but dendritic post-ER carriers containing GABAB

Powdery mildew on common bean (Phaseolus vulgaris L.) in Northern Sinaloa, Mexico

Powdery mildew of beans is a disease in Northern Sinaloa state in Mexico, however, the identity of the causal agent, which is an obligate parasite, has not yet been elucidated due to lacking formation on its teleomorph. The objective of this study was to identify the causal agent of the disease through morphometric studies of the anamorph, and molecular techniques based on the ITS (internal transcribed spacers) region of the ribosomal DNA. We collected ten samples of different bean varieties that exhibited symptoms of the disease in the Fuerte Valley during the 2006-2007 fall/winter growing season. Morphological characteristics of the anamorph and the molecular phylogenetic analysis revealed that the causal fungus belongs to the mitosporic genus Oidium subgenus Pseudoidium. All samples had conidiophores of the Pseudoidium type, whose conidia were mainly cylindrical, and when partially collapsed, their walls showed longitudinal wrinkling, except on their ends, where the wall appeared almost smooth. Phylogenetic analysis of the ITS1-5.8S-ITS2 rDNA region revealed that our collections of powdery mildew of beans are closely related to specimens of Erysiphe diffusa associated with soybeans and to an Erysiphe sp. associated with Phaseolus vulgaris