Remarks on twisted theories with matter

We investigate some aspects of N=2 twisted theories with matter hypermultiplets in the fundamental representation of the gauge group. A consistent formulation of these theories on a general four-manifold requires turning on a particular magnetic flux, which we write down explicitly in the case of SU(2k). We obtain the blowup formula and show that the blowup function is given by a hyperelliptic sigma-function with singular characteristic. We compute the contact terms and find, as a corollary, interesting identities between hyperelliptic Theta functions.Comment: 18 pages, harvmac, one figur

Tolerancia in vitro de Fusarium solani y Fusarium semitectum (anamorfos, Ascomycota) a la exposición a desinfectantes de superficie utilizados en acuicultura

An in vitro evaluation of the antifungal effect of acetic acid (AcH), buffered acetic acid (AcH+AcNa), potassium iodide (KI) and Iodopovidone (IP); on the growth rate (GR) of Fusarium solani (Mart.) Sacc. 1881 and Fusarium semitectum Berk. & Ravenel, 1875 was performed. Both fungal species were isolated from eggs of the Argentinian silverside Odontesthes bonariensis (Cuvier & Valenciennes, 1835). The studied substances are commonly used in fish farming as surface disinfectants. The tested concentrations of this substances exhibited antifungal activity for both strains at concentrations higher than their 96h median lethal concentrations (LC50-96h) for the treated eggs; concentrations below the (LC50-96h) exhibited little or no effect.Se evaluó in vitro el efecto del: acido acético (AcH), ácido acético tamponado (AcH+AcNa), ioduro de potasio (IK) y Iodopovidona (IP) sobre la tasa de crecimiento (TC) de Fusarium solani (Mart.) Sacc. 1881 y Fusarium semitectum Berk. & Ravenel, 1875. Ambas especies fueron aisladas de ovas de Odontesthes bonariensis (Cuvier & Valenciennes, 1835). Las sustancias estudiadas son comúnmente utilizadas en acuicultura como desinfectantes de superficie. Las concentraciones ensayadas con actividad fungicida para ambas cepas fueron mucho más elevadas que las correspondientes concentraciones letales medias a 96 horas (CL50-96h) para ovas de pejerrey. Concentraciones inferiores a la CL50 - 96h exhibieron un efecto fungistático escaso o nulo

In vitro tolerance of Fusarium semitectum and Fusarium solani (anamorphic, Ascomycota) exposed to surface disinfectant commonly used in aquaculture

Se evaluó in vitro el efecto del: acido acético (AcH), ácido acético tamponado (AcH+AcNa), ioduro de potasio (IK) y Iodopovidona (IP) sobre la tasa de crecimiento (TC) de Fusarium solani (Mart.) Sacc. 1881 y Fusarium semitectum Berk. & Ravenel, 1875. Ambas especies fueron aisladas de ovas de Odontesthes bonariensis (Cuvier & Valenciennes, 1835). Las sustancias estudiadas son comúnmente utilizadas en acuicultura como desinfectantes de superficie. Las concentraciones ensayadas con actividad fungicida para ambas cepas fueron mucho más elevadas que las correspondientes concentraciones letales medias a 96 horas (CL50-96h) para ovas de pejerrey. Concentraciones inferiores a la CL50 - 96h exhibieron un efecto fungistático escaso o nulo.An in vitro evaluation of the antifungal effect of acetic acid (AcH), buffered acetic acid (AcH+AcNa), potassium iodide (KI) and Iodopovidone (IP); on the growth rate (GR) of Fusarium solani (Mart.) Sacc. 1881 and Fusarium semitectum Berk. & Ravenel, 1875 was performed. Both fungal species were isolated from eggs of the Argentinian silverside Odontesthes bonariensis (Cuvier & Valenciennes, 1835). The studied substances are commonly used in fish farming as surface disinfectants. The tested concentrations of this substances exhibited antifungal activity for both strains at concentrations higher than their 96h median lethal concentrations (LC50-96h) for the treated eggs; concentrations below the (LC50-96h) exhibited little or no effect.Fil: Pacheco Marino, Suani Giovanna. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Instituto de Botánica Spegazzini; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cabello, Marta N.. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Instituto de Botánica Spegazzini; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Salibián, Alfredo. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de Luján; Argentin

Environmental diagnosis in the farming belt of Santa Fe city

El cinturón hortícola de la ciudad de Santa Fe se ubica en el norte del ejido urbano. En dicha zona la provisión de agua se realiza con perforaciones domiciliarias que conviven con pozos negros y tareas. Las actividades que se desarrollan representan importantes amenazas de contaminación. Además el peligro de contaminación podría incrementarse por un aumento de la vulnerabilidad, dada por el ascenso de los niveles de agua subterránea y/o aumento de la capacidad de transporte de contaminantes al ambiente subterráneo, provocado por inundaciones fluviales o pluviales. El diagnóstico ambiental que aquí se presenta fue elaborado sobre la base de estudios antecedentes, entrevistas, encuestas y relevamientos de campo, muestreos y análisis de laboratorio. Se caracterizaron prácticas agrícolas y actividades que se desarrollan en la zona, asignándoles una categoría según la amenaza de contaminación del agua subterránea. Se relevó especies cultivadas, agroquímicos, riego, aspectos socioculturales, forma de vida de los habitantes y características relacionadas con el saneamiento, utilización del recurso y compromiso con el ambiente por parte de la población. Sobre la base de los resultados obtenidos se plantean algunos lineamientos de gestión y protección del recurso hídrico subterráneo, orientados al desarrollo ambientalmente sostenible de la zona.The farming belt of Santa Fe city is located North of the urban area. There is no water supply or sewer system in the area. Water is withdrawn from private wells drilled in households, coexisting with septic tanks and orchards. The activities developed constitute serious contamination threats; contamination hazards could increase due to a rise in the levels of groundwater and/or fluvial or rain floods. The environmental diagnosis presented was made gathering information from previous research studies, interviews to professionals, surveys among producers, as well as by field and laboratory analysis. Agricultural practices, cultivated species, agrochemicals use and irrigation practices, as well as socio-cultural aspects, residents’ lifestyle and characteristics related to drainage, use of resources and commitment to the environment by the population were reported. On the basis of the results obtained, some guidelines for the management and protection of the groundwater resources are outlined, in order to contribute to an environmentally sustainable development of the region.Fil: Durán, Alejandra. Universidad Nacional del LitoralFil: Paris, Marta. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias HídricasFil: Maitre, María Inés. Universidad Nacional del LitoralFil: Marino, Fernanda. Universidad Nacional del Litora

On the feasibility of the Rayleigh cycle for dynamic soaring trajectories

Dynamic soaring is a flight technique used by albatrosses and other birds to cover large distances without the expenditure of energy, which is extracted from the available wind conditions, as brightly perceived five centuries ago by Leonardo da Vinci. Closed dynamic soaring trajectories use spatial variations of wind speed to travel, in principle, indefinitely over a prescribed area. The application of the concept of closed dynamic soaring trajectories to aerial vehicles, such as UAVs, may provide a solution to improve the endurance in certain missions. The main limitation of dynamic soaring is its dependence on the wind characteristics. More than one century ago, Lord Rayleigh proposed a very simple model, based on the repeated crossing of a step wind profile, presently known as Rayleigh cycle, that provides a clear explanation of the physical phenomenon. The present paper studies the feasibility of closed, single-loop, energy-neutral trajectories for a broad set of wind and vehicle conditions. Through the use of trajectory optimization methods, it was possible to see how the shape of the wind profile, the initial flight conditions and the vehicle constraints influence the required wind strength to perform dynamic soaring trajectories and consequently their feasibility. It was possible to conclude that there are optimal values for the initial airspeed and initial height of the vehicle, that minimize the required wind strength. In addition, it was seen how the structural and aerodynamic constraints of the vehicle affect dynamic soaring at high and low airspeeds respectively. Finally, some new trajectories that can be performed in conditions of excess wind are proposed. The purpose is to maximize the time spent aloft and the path length while maintaining the concept of single-loop, energy-neutral trajectories, making them especially useful for aerial vehicles surveillance applications

The Effects of the Metal Ion Substitution into the Active Site of Metalloenzymes: A Theoretical Insight on Some Selected Cases

A large number of enzymes need a metal ion to express their catalytic activity. Among the different roles that metal ions can play in the catalytic event, the most common are their ability to orient the substrate correctly for the reaction, to exchange electrons in redox reactions, to stabilize negative charges. In many reactions catalyzed by metal ions, they behave like the proton, essentially as Lewis acids but are often more effective than the proton because they can be present at high concentrations at neutral pH. In an attempt to adapt to drastic environmental conditions, enzymes can take advantage of the presence of many metal species in addition to those defined as native and still be active. In fact, today we know enzymes that contain essential bulk, trace, and ultra-trace elements. In this work, we report theoretical results obtained for three different enzymes each of which contains different metal ions, trying to highlight any differences in their working mechanism as a function of the replacement of the metal center at the active site

APPL endosomes are not obligatory endocytic intermediates but act as stable cargo-sorting compartments

Endocytosis allows cargo to enter a series of specialized endosomal compartments, beginning with early endosomes harboring Rab5 and its effector EEA1. There are, however, additional structures labeled by the Rab5 effector APPL1 whose role in endocytic transport remains unclear. It has been proposed that APPL1 vesicles are transport intermediates that convert into EEA1 endosomes. Here, we tested this model by analyzing the ultrastructural morphology, kinetics of cargo transport, and stability of the APPL1 compartment over time. We found that APPL1 resides on a tubulo-vesicular compartment that is capable of sorting cargo for recycling or degradation and that displays long lifetimes, all features typical of early endosomes. Fitting mathematical models to experimental data rules out maturation of APPL1 vesicles into EEA1 endosomes as a primary mechanism for cargo transport. Our data suggest instead that APPL1 endosomes represent a distinct population of Rab5-positive sorting endosomes, thus providing important insights into the compartmental organization of the early endocytic pathway

Biological Control of the Chagas Disease Vector Triatoma infestans with the Entomopathogenic Fungus Beauveria bassiana Combined with an Aggregation Cue: Field, Laboratory and Mathematical Modeling Assessment

Background: Current Chagas disease vector control strategies, based on chemical insecticide spraying, are growingly threatened by the emergence of pyrethroid-resistant Triatoma infestans populations in the Gran Chaco region of South America. Methodology and findings: We have already shown that the entomopathogenic fungus Beauveria bassiana has the ability to breach the insect cuticle and is effective both against pyrethroid-susceptible and pyrethroid-resistant T. infestans, in laboratory as well as field assays. It is also known that T. infestans cuticle lipids play a major role as contact aggregation pheromones. We estimated the effectiveness of pheromonebased infection boxes containing B. bassiana spores to kill indoor bugs, and its effect on the vector population dynamics. Laboratory assays were performed to estimate the effect of fungal infection on female reproductive parameters. The effect of insect exuviae as an aggregation signal in the performance of the infection boxes was estimated both in the laboratory and in the field. We developed a stage-specific matrix model of T. infestans to describe the fungal infection effects on insect population dynamics, and to analyze the performance of the biopesticide device in vector biological control. Conclusions: The pheromone-containing infective box is a promising new tool against indoor populations of this Chagas disease vector, with the number of boxes per house being the main driver of the reduction of the total domestic bug population. This ecologically safe approach is the first proven alternative to chemical insecticides in the control of T. infestans. The advantageous reduction in vector population by delayedaction fungal biopesticides in a contained environment is here shown supported by mathematical modeling.Fil: Forlani, Lucas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Pedrini, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Girotti, Juan Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Mijailovsky, Sergio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Cardozo, Rubén Marino. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Patología Experimental. Universidad Nacional de Salta. Facultad de Ciencias de la Salud. Instituto de Patología Experimental; Argentina. Provincia de Salta. Ministerio de Salud Pública. Coordinación de Gestión Epidemiológica; ArgentinaFil: Gentile, Alberto G.. Provincia de Salta. Ministerio de Salud Pública. Coordinación de Gestión Epidemiológica; ArgentinaFil: Hernández Suárez, Carlos. Universidad de Colima. Facultad de Ciencias; MéxicoFil: Rabinovich, Jorge Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Juarez, Marta Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; Argentin

Correlación entre el comportamiento del toro de lidia en los corrales y el ruedo

The value of fighting bulls (Lidia breed) is quantified based on their behavior in the bullring. Predicting this behavior is challenging because the heritability of behavior patterns is unknown and their interpretation subjective. An analysis was done of the possible relationship between bull behavior during pre-bullfight handling (unloading, first and second veterinary examinations) and during the bullfight. Behavioral parameter data was recorded for 200 adult bulls during pre-bullfight handling and the bullfight. Among the six genetic lines in the sample, the Santa Coloma and Albaserrada lines exhibited the highest values for mobility, aggressiveness, respiratory rate, and fight rate. Correlations were identified between some behaviors in pre-bullfight handling and others during the bullfight. Mobility during unloading and the first examination was positively correlated with Exit speed in the opening, Focus on banderillero (lancer on foot) in the second period of the bullfight and Determination in the third period. In contrast, aggressiveness during unloading was negatively correlated with mobility parameters during the second and third periods. No differences between animals were observed during the second examination, indicating that bulls quickly adapted to the corrals. The results suggest that some aspects of bull behavior prior to the bullfight can provide valuable information to bullfighters and breeders.El valor productivo de cada toro de lidia se cuantifica en función de su comportamiento en la plaza, el cual es muy difícil de predecir, puesto que se desconoce la heredabilidad de cada tipo de comportamiento, y su interpretación suele ser subjetiva. En este trabajo, se analiza la posible relación de la actitud observada durante la estancia previa del toro en los corrales de la plaza, con el comportamiento desarrollado durante la lidia. Para ello, se han estudiado 200 toros adultos, registrando su comportamiento en los corrales y posteriormente durante la lidia. Se observan diferencias entre encastes en los patrones registrados previos a la lidia, siendo los encastes Santa Coloma y Albaserrada los que desarrollaron una mayor movilidad, agresividad, frecuencia respiratoria y tasa de peleas. Existen correlaciones significativas entre varias conductas recogidas durante el desembarque y los patrones etológicos registrados durante la lidia. La movilidad durante el desembarque y primer reconocimiento veterinario se correlaciona positivamente con la rapidez de salida, con la fijeza en banderillas y con la repetición de embestida en la muleta. De forma inversa la agresividad durante el desembarque, evidenciada en el mayor número de embestidas a los burladeros, se correlaciona negativamente con parámetros indicativos de movilidad durante las banderillas y muleta. Durante el segundo reconocimiento veterinario, no se observaron grandes diferencias de comportamiento entre animales, ya que el toro se aclimata rápidamente al nuevo entorno de los corrales. Los resultados obtenidos apuntan una relación entre la actitud del animal previa a la corrida, lo cual puede dar información valiosa a toreros y ganaderos