Aspectos sinópticos de la sequía que afectó a la República Argentina en el año 1962

Este trabajo consiste en el estudio meteorológico de la sequía que afecta a nuestro país en casi el 80% de su territorio, durante períodos prolongados del año 1962. Se han individualizado los rasgos más relevantes de la circulación del aire sobre nuestro país, en la troposfera baja y media, para distintos parámetros de superficie y altura. Las anomalías encontradas durante los meses de sequía (déficit generalizado de precipitación, presión superior a la normal en casi todo el país; prevalencia de aire más seco que lo normal en todo el territorio y de aire más frío en el centro y norte del país; predominio de flujo sudoeste en 500 mb vía Puerto Montt-Ezeiza-Resistencía), han estado relacionadas con las siguientes singularidades en la circulación: a) inhibición de la penetración del aire tropical, cálido y húmedo, proveniente del Brasil y del Océano Atlántico; b) intensificación de la influencia del anticiclón subtropical semi permanente del Pacífico, frente a las costas chilenas; c) persistencia de una acción bloqueante en el Atlántico Sur, al sur del paralelo 55° LS.This paper deals with the meteorological study of the drought that affected the Argentine Republic in almost 80% of its territory, during long periods of year 1962. The most relevant characteristics of the air circulation over our country, in the lower and middle troposphere, have been recognized by means of synoptic analysis of monthly mean fields of deviation from normal, for different surface and upper meteorological parameters. The anomalies that have been found during drought months (general precipitation deficit; pressure higher than normal in almost the whole country; prevalence of air drier than normal over the whole territory and colder than normal over the central and northern Argentina; persistent southwesterly flux at 500 mb, vía Puerto Montt-Ezeiza-Resistencia), have been related with the following singularities in air circulation: a) inhibition of tropical air penetration, coming from Brazil and the Atlantic Ocean; b) a stronger influence of Pacific subtropical anticyclone, opposite Chilean coasts; c) a persistent blocking action over South Atlantic Ocean, south from 55° parallel.Asociación Argentina de Geofísicos y Geodesta

Aspectos sinópticos de la sequía que afectó a la República Argentina en el año 1962

Este trabajo consiste en el estudio meteorológico de la sequía que afecta a nuestro país en casi el 80% de su territorio, durante períodos prolongados del año 1962. Se han individualizado los rasgos más relevantes de la circulación del aire sobre nuestro país, en la troposfera baja y media, para distintos parámetros de superficie y altura. Las anomalías encontradas durante los meses de sequía (déficit generalizado de precipitación, presión superior a la normal en casi todo el país; prevalencia de aire más seco que lo normal en todo el territorio y de aire más frío en el centro y norte del país; predominio de flujo sudoeste en 500 mb vía Puerto Montt-Ezeiza-Resistencía), han estado relacionadas con las siguientes singularidades en la circulación: a) inhibición de la penetración del aire tropical, cálido y húmedo, proveniente del Brasil y del Océano Atlántico; b) intensificación de la influencia del anticiclón subtropical semi permanente del Pacífico, frente a las costas chilenas; c) persistencia de una acción bloqueante en el Atlántico Sur, al sur del paralelo 55° LS.This paper deals with the meteorological study of the drought that affected the Argentine Republic in almost 80% of its territory, during long periods of year 1962. The most relevant characteristics of the air circulation over our country, in the lower and middle troposphere, have been recognized by means of synoptic analysis of monthly mean fields of deviation from normal, for different surface and upper meteorological parameters. The anomalies that have been found during drought months (general precipitation deficit; pressure higher than normal in almost the whole country; prevalence of air drier than normal over the whole territory and colder than normal over the central and northern Argentina; persistent southwesterly flux at 500 mb, vía Puerto Montt-Ezeiza-Resistencia), have been related with the following singularities in air circulation: a) inhibition of tropical air penetration, coming from Brazil and the Atlantic Ocean; b) a stronger influence of Pacific subtropical anticyclone, opposite Chilean coasts; c) a persistent blocking action over South Atlantic Ocean, south from 55° parallel.Asociación Argentina de Geofísicos y Geodesta

Specialisation events of fungal metacommunities exposed to a persistent organic pollutant are suggestive of augmented pathogenic potential

Background: The impacts of man-made chemicals, in particular of persistent organic pollutants, are multifactorial as they may affect the integrity of ecosystems, alter biodiversity and have undesirable effects on many organisms. We have previously demonstrated that the belowground mycobiota of forest soils acts as a buffer against the biocide pollutant pentachlorophenol. However, the trade-offs made by mycobiota to mitigate this pollutant remain cryptic. Results: Herein, we demonstrate using a culture-dependent approach that exposure to pentachlorophenol led to alterations in the composition and functioning of the metacommunity, many of which were not fully alleviated when most of the biocide was degraded. Proteomic and physiological analyses showed that the carbon and nitrogen metabolisms were particularly affected. This dysregulation is possibly linked to the higher pathogenic potential of the metacommunity following exposure to the biocide, supported by the secretion of proteins related to pathogenicity and reduced susceptibility to a fungicide. Our findings provide additional evidence for the silent risks of environmental pollution, particularly as it may favour the development of pathogenic trade-offs in fungi, which may impose serious threats to animals and plant hosts

Differential mortality association of loop diuretic dosage according to blood urea nitrogen and carbohydrate antigen 125 following a hospitalization for acute heart failure

AimsRecent observations in chronic stable heart failure suggest that high-dose loop diuretics (HDLDs) have detrimental prognostic effects in patients with high blood urea nitrogen (BUN), but recent findings have also indicated that diuretics may improve renal function. Carbohydrate antigen 125 (CA125) has been shown to be a surrogate of systemic congestion. We sought to explore whether BUN and CA125 modulate the mortality risk associated with HDLDs following a hospitalization for acute heart failure (AHF).Methods and resultsWe analysed 1389 consecutive patients discharged for AHF. CA125 and BUN were measured at a mean of 72 ± 12 h after admission. HDLDs (≥120 mg/day in furosemide equivalent dose) were interacted to a four-level variable according to CA125 (>35 U/mL) and BUN (above the median), and related to all-cause mortality. At a median follow-up of 21 months, 561 (40.4%) patients died. The use of HDLDs was independently associated with increased mortality [hazard ratio (HR) 1.23, 95% confidence interval (CI) 1.01–1.50], but this association was not homogeneous across CA125–BUN categories (P for interaction <0.001). In patients with normal CA125, use of HDLDs was associated with high mortality if BUN was above the median (HR 2.29, 95% 1.51–3.46), but not in those with BUN below the median (HR 1.22, 95% CI 0.73–2.04). Conversely, in patients with high CA125, HDLDs showed an association with increased survival if BUN was above the median (HR 0.73, 95% CI 0.55–0.98) but was associated with increased mortality in those with BUN below the median (HR 1.94, 95% CI 1.36–2.76).ConclusionThe risk associated with HDLDs in patients after hospitalization for AHF was dependent on the levels of BUN and CA125. The information provided by these two biomarkers may be helpful in tailoring the dose of loop diuretics at discharge for AHF

Fortnite Addiction in Need of Hospital Detox

La generalización del uso de nuevas tecnologías en la vida cotidiana y en aspectos relativos al ocio está sacando a relucir potenciales perjuicios del uso inadecuado de los videojuegos y la necesidad de tratamiento especializado en aquellos sujetos con signos de adicción comportamental. Se expone el caso de un varón de 15 años con grave adicción comportamental al videojuego Fortnite que requirió de hospitalización completa para su desintoxicación. Describimos el tratamiento llevado a cabo con abordaje multidisciplinar e intensivo tanto individual como de su entorno y los resultados de su eficacia en un estudio de caso. El tratamiento recibido ha permitido que se pueda abordar con el sujeto la sintomatología subyacente que quedaba encubierta por la adicción a las pantallas y ha permitido afrontar la emocionalidad vivida. Los resultados muestran una disminución significativa del tiempo de uso de juego, así como una mejoría del funcionamiento personal y social del paciente.The widespread use of new technologies in daily life and in different kind of activities aspects related to leisure is bringing to light potential damages negative effects of the inappropriate use of video games and the need for specialized treatment in those subjects with signs of behavioral addiction. The case of a 15-year-old boy with a serious behavioral addiction to the Fortnite video game that required full hospitalization for detoxification is exposed. We describe the treatment carried out with a multidisciplinary and intensive approach, both individually and in its environment, and the results of its efficacy in a case study. The treatment received has allowed the subject to address the underlying symptoms that were hidden by the addiction to screens and has allowed them to face the emotionality experienced. The results show a significant decrease in gaming use time, as well as an improvement in the patient’s personal and social functioning

Mesons in marginally deformed AdS/CFT

We study the embedding of spacetime filling D7-branes in beta-deformed backgrounds which, according to the AdS/CFT dictionary, corresponds to flavoring beta-deformed N=4 super Yang-Mills. We consider supersymmetric and more general non-supersymmetric three parameter deformations. The equations of motion for quadratic fluctuations of a probe D7-brane wrapped on a deformed three-sphere exhibit a non-trivial coupling between scalar and vector modes induced by the deformation. Nevertheless, we manage to solve them analytically and find that the mesonic mass spectrum is discrete, with a mass gap and a Zeeman-like splitting occurs. Finally we propose the action for the dual field theory as obtained by star-product deformation of super Yang-Mills with fundamental matter.Comment: LaTex, 42 pages, 3 figures, uses JHEP

DESARROLLO DE UN PROTOCOLO DE MULTIPLICACIÓN DE BAMBÚ GUADUA ANGUSTIFOLIA USANDO BIORREACTORES DE INMERSIÓN TEMPORAL BITS, CON FINES DE REFORESTACIÓN

The Bamboo Guadua angustifolia has great economic and environmental importance, but its traditional methods of propagation are inefficient. The objective of the study was to develop an efficient micropropagation protocol for Guadua, using Temporary Immersion Bioreactors BITs. For the establishment, disinfected nodal segments and Murashige &amp; Skoog MS medium + 2 mg L-1 of benzylaminopurine BAP were used. For micropropagation, 5 doses of BAP 2, 3, 4, 5 and 6 mg L-1 were tested. In the multiplication phase in BITs, MS was used with 3 doses of BAP 3, 4, 5 mg L-1 and immersion frequencies every 3, 6 and 8 hours. For rooting in BITs, MS + 2.5 mg L-1 of adenine sulfate was used. The results showed that using 2 mg L-1 of BAP, one shoot per explant was obtained, while with 3, 4, 5 and 6 mg L-1 of BAP, 2 shoots were obtained. In BIT multiplication, 3.5, 7.5 and 10.4 shoots per explant were obtained with doses of 3, 4 and 5 mg L-1 of BAP, respectively. Using immersion frequencies every 3, 6, and 8 hours, 7.5, 8.7, and 13.6 shoots per plant were obtained, respectively. The number of roots was 11.3, 4.0 and 4.3 with immersion frequencies of 3, 6 and 8 hours. The best results in BITs were obtained using 3 mg L-1 of BAP and immersion frequency every 3 hours The results show significant advances in bamboo micropropagation and applicable to other species.El Bambú Guadua angustifolia posee gran importancia económica y ambiental, pero sus métodos tradicionales de propagación son ineficientes. El objetivo del estudio fue desarrollar un eficiente protocolo de micropropagación para Guadua, utilizando Biorreactores de Inmersión Temporal BITs. Para el establecimiento se utilizaron segmentos nodales desinfectados y medio Murashige &amp; Skoog MS + 2 mg L-1 de bencilaminopurina BAP. Para la micropropagación se ensayaron 5 dosis de BAP 2, 3, 4, 5 y 6 mg L-1. En fase de multiplicación en BITS se utilizó MS con 3 dosis de BAP 3, 4, 5 mg L-1 y frecuencias de inmersión cada 3, 6 y 8 horas. Para enraizamiento en BITs se utilizó MS + 2.5 mg L-1 de sulfato de adenina. Los resultados mostraron que usando 2 mg L-1 de BAP, se obtuvo un brote por explante, mientras que con 3, 4, 5 y 6 mg L-1 de BAP se obtuvieron 2 brotes. En multiplicación BIT se obtuvieron 3.5, 7.5 y 10.4 brotes por explante con dosis de 3, 4 y 5 mg L-1 de BAP, respectivamente. Usando frecuencias de inmersión cada 3, 6 y 8 horas, se obtuvieron 7.5, 8.7 y 13.6 brotes por plantas, respectivamente. El número de raíces fue de 11.3, 4.0 y 4.3 con frecuencias de inmersiones de 3, 6 y 8 horas. Los mejores resultados en BITs se obtuvieron usando 3 mg L-1 de BAP y frecuencia de inmersión cada 3 horas. Los resultados muestran avances significativos en micropropagación de bambú y aplicable a otras especies

Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy -- corrected for geometrical effects -- is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO

Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy

We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principle calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the direct calibration of any cosmic-ray radio detector against the well-established energy scale of the Pierre Auger Observatory.Comment: Replaced with published version. Added journal reference and DOI. Supplemental material in the ancillary file