973 research outputs found

    Zelleromyces giennensis sp. Nov. (Russulales), a gasteroid fungus from the south of Spain.

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    [EN] Zellerornyces giennensis isproposed and described as a new species, inc1uding data on its taxonomy, ecology, morphology, anatomy and relationships with re1ated species.[ES] Se propone Zellerornyces giennensis como especie nueva para la ciencia, y se aportan datos sobre su taxonomía, ecología, morfología, anatomía, así como semejanzas y diferencias con especies próximas.[FR] Zellerornyces giennensis est proposé comme nouvelle espèce, avec l'apport de données sur la taxonomie, l'écologie, la morphologie, l'anatomie et les relations avec les taxa proches.Peer reviewe

    Conservation of Spanish Water dog in natural areas in andalusian country

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    The Spanish Water dog (P.A.E.) has been conserved in the protected areas of the Andalusian country as a sheep herd dog. In the future the conservation of this breed as a functional dog will be based on this traditional actitude, but maintaining other uses such as hunter dog, police dog, etc. An actuation plan in two levels, is demanded; one about biological aspects directed to avoid the inconvenient of the inbreeding; and another one to increase the support of de administrations as a functional dog breed.El Perro de Agua Español (P.A.E.) se ha conservado en las áreas protegidas de Andalucía como perro de ganado de los rebaños de pequeños rumiantes. En un futuro la conservación de la raza como perro de función se fundamenta en su trabajo tradicional como perro pastor en funciones de pastoreo moderno, además de otros empleos como perro de caza, perro de rastro, etc. Se precisa un plan de actuación a dos niveles, uno sobre aspectos biológicos encaminado a evitar los inconvenientes de la endocría y otro para potenciar el apoyo de las Administraciones como perro de función

    Frequencies of deletereus character in the spanish water dog affecting the breed conservation

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    321 puppies of the Spanish Water Dog Breed have been used to study the frequency of presentation of several deleterious characters between the years 1995 and 1998. The enogmatism and the monorquidism shown frequencies relatively low, but we stand out these characters because their control is very important for the relationship with respect the adaptive capacity of these animals. In the same way the prognatism and the absence of premolars were present with a frequency slightly high, it must take into account in the selection criteria of the breed. By another side, we found a signifficative association between the presence of heath anomalies and slightly high populational levels of inbreeding, and then we have to avoid these breeding practices in the racial lines presenting this defect.Sobre un total de 321 cachorros nacidos de la raza Perro de Agua Español entre los años 1995 y 1998 se estudian las frecuencias de aparición de diferentes caracteres deletéreos. Los caracteres enogmatismo y monorquidia muestran unas frecuencias relativamente bajas, si bien destacamos la importancia de su control ya que su expresión afecta a la capacidad adaptativa de los animales. Asimismo, el prognatismo y la ausencia de premolares se presentan con unas frecuencias moderadamente altas que recomendamos incluir en los criterios de selección de la raza. Por otra parte, encontramos asociación significativa entre la aparición de anomalías cardíacas y niveles relativamente altos de endogamia en la población por lo que se desaconseja la endocría en las líneas raciales que presentan este defecto

    Conservation of the Spanish Alano dog breed: phaneroptical characterisation

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    A preliminary phaneroptical characterisation of the Spanish Alano Dog Breed is done studying, on a random sample formed by 135 specimens, six external variables: coat colour and distribution; hair type; mucosae, and iris colour; type of bite; and absence of premolars. We have concluded that this breed is characterised by the presentation of yellow and brindled coats, with other coat colours as residuals, standing out the combined black and brindled coat, not present in other related breeds, what could be considered as a breed marker character. The breed is also characterised by short hair, black pigmented mucosae , brown iris, with general presentation of a mask. The dentition characteristics are the presence of a prognatic bite (slight) and absence of premolars, both characters related to the origin of the breed.Se realiza una caracterización faneróptica preliminar sobre una muestra aleatoria de 135 ejemplares de raza Alano Español. Se consideran las variables: color y distribución de la capa, tipo de pelo, coloración de las mucosas e iris, tipo de mordida y ausencia de premolares. Se concluye que el Alano Español presenta como capas predominantes la barcina y la leonada, siendo minoritarias la capa negro y bardino, ausente en la mayoría de razas consultadas, y que podría constituirse como un carácter marcador de raza. Asimismo la raza se caracteriza por presentar pelo liso, mucosas pigmentadas en negro, iris de color castaño, con presencia de máscara generalmente. La raza mayoritariamente presenta una mordida prognática (tijera invertida), con ausencia de premolares, caracteres ambos acordes con el origen de la raza

    The effect of seasoning with herbs on the nutritional, safety and sensory properties of reduced-sodium fermented Cobrançosa cv. table olives

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    This study aimed at evaluating the effectiveness of seasoning Cobrancosa table olives in a brine with aromatic ingredients, in order to mask the bitter taste given by KCl when added to reduced-sodium fermentation brines. Olives were fermented in two different salt combinations: Brine A, containing 8% NaCl and, Brine B, a reduced-sodium brine, containing 4% NaCl + 4% KCl. After the fermentation the olives were immersed in seasoning brines with NaCl (2%) and the aromatic herbs (thyme, oregano and calamintha), garlic and lemon. At the end of the fermentation and two weeks after seasoning, the physicochemical, nutritional, organoleptic, and microbiological parameters, were determined. The olives fermented in the reduced-sodium brines had half the sodium concentration, higher potassium and calcium content, a lower caloric level, but were considered, by a sensorial panel, more bitter than olives fermented in NaCl brine. Seasoned table olives, previously fermented in Brine A and Brine B, had no significant differences in the amounts of protein (1.23% or 1.11%), carbohydrates (1.0% or 0.66%), fat (20.0% or 20.5%) and dietary fiber (3.4% or 3.6%). Regarding mineral contents, the sodium-reduced fermented olives, presented one third of sodium, seven times more potassium and three times more calcium than the traditional olives fermented in 8% NaCl. Additionally, according to the panelists' evaluation, seasoning the olives fermented in 4% NaCl + 4% KCl, resulted in a decrease in bitterness and an improvement in the overall evaluation and flavor. Escherichia coli and Salmonella were not found in the olives produced.info:eu-repo/semantics/publishedVersio

    Very high energy particle acceleration powered by the jets of the microquasar SS 433

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    SS 433 is a binary system containing a supergiant star that is overflowing its Roche lobe with matter accreting onto a compact object (either a black hole or neutron star). Two jets of ionized matter with a bulk velocity of 0.26c\sim0.26c extend from the binary, perpendicular to the line of sight, and terminate inside W50, a supernova remnant that is being distorted by the jets. SS 433 differs from other microquasars in that the accretion is believed to be super-Eddington, and the luminosity of the system is 1040\sim10^{40} erg s1^{-1}. The lobes of W50 in which the jets terminate, about 40 pc from the central source, are expected to accelerate charged particles, and indeed radio and X-ray emission consistent with electron synchrotron emission in a magnetic field have been observed. At higher energies (>100 GeV), the particle fluxes of γ\gamma rays from X-ray hotspots around SS 433 have been reported as flux upper limits. In this energy regime, it has been unclear whether the emission is dominated by electrons that are interacting with photons from the cosmic microwave background through inverse-Compton scattering or by protons interacting with the ambient gas. Here we report TeV γ\gamma-ray observations of the SS 433/W50 system where the lobes are spatially resolved. The TeV emission is localized to structures in the lobes, far from the center of the system where the jets are formed. We have measured photon energies of at least 25 TeV, and these are certainly not Doppler boosted, because of the viewing geometry. We conclude that the emission from radio to TeV energies is consistent with a single population of electrons with energies extending to at least hundreds of TeV in a magnetic field of 16\sim16~micro-Gauss.Comment: Preprint version of Nature paper. Contacts: S. BenZvi, B. Dingus, K. Fang, C.D. Rho , H. Zhang, H. Zho

    Constraining the pˉ/p\bar{p}/p Ratio in TeV Cosmic Rays with Observations of the Moon Shadow by HAWC

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    An indirect measurement of the antiproton flux in cosmic rays is possible as the particles undergo deflection by the geomagnetic field. This effect can be measured by studying the deficit in the flux, or shadow, created by the Moon as it absorbs cosmic rays that are headed towards the Earth. The shadow is displaced from the actual position of the Moon due to geomagnetic deflection, which is a function of the energy and charge of the cosmic rays. The displacement provides a natural tool for momentum/charge discrimination that can be used to study the composition of cosmic rays. Using 33 months of data comprising more than 80 billion cosmic rays measured by the High Altitude Water Cherenkov (HAWC) observatory, we have analyzed the Moon shadow to search for TeV antiprotons in cosmic rays. We present our first upper limits on the pˉ/p\bar{p}/p fraction, which in the absence of any direct measurements, provide the tightest available constraints of 1%\sim1\% on the antiproton fraction for energies between 1 and 10 TeV.Comment: 10 pages, 5 figures. Accepted by Physical Review

    Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC

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    We present TeV gamma-ray observations of the Crab Nebula, the standard reference source in ground-based gamma-ray astronomy, using data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory. In this analysis we use two independent energy-estimation methods that utilize extensive air shower variables such as the core position, shower angle, and shower lateral energy distribution. In contrast, the previously published HAWC energy spectrum roughly estimated the shower energy with only the number of photomultipliers triggered. This new methodology yields a much improved energy resolution over the previous analysis and extends HAWC's ability to accurately measure gamma-ray energies well beyond 100 TeV. The energy spectrum of the Crab Nebula is well fit to a log parabola shape (dNdE=ϕ0(E/7 TeV)αβln(E/7 TeV))\left(\frac{dN}{dE} = \phi_0 \left(E/\textrm{7 TeV}\right)^{-\alpha-\beta\ln\left(E/\textrm{7 TeV}\right)}\right) with emission up to at least 100 TeV. For the first estimator, a ground parameter that utilizes fits to the lateral distribution function to measure the charge density 40 meters from the shower axis, the best-fit values are ϕo\phi_o=(2.35±\pm0.040.21+0.20^{+0.20}_{-0.21})×\times1013^{-13} (TeV cm2^2 s)1^{-1}, α\alpha=2.79±\pm0.020.03+0.01^{+0.01}_{-0.03}, and β\beta=0.10±\pm0.010.03+0.01^{+0.01}_{-0.03}. For the second estimator, a neural network which uses the charge distribution in annuli around the core and other variables, these values are ϕo\phi_o=(2.31±\pm0.020.17+0.32^{+0.32}_{-0.17})×\times1013^{-13} (TeV cm2^2 s)1^{-1}, α\alpha=2.73±\pm0.020.02+0.03^{+0.03}_{-0.02}, and β\beta=0.06±\pm0.01±\pm0.02. The first set of uncertainties are statistical; the second set are systematic. Both methods yield compatible results. These measurements are the highest-energy observation of a gamma-ray source to date.Comment: published in Ap

    Application of molecular topology to the prediction of inhibition of Trypanosoma cruzi Hexokinase by bisphosphonates

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    Se ha desarrollado un modelo topológico-matemático para la búsqueda de nuevos derivados bisfosfonatos activos frente a la hexokinasa de Trypanosoma cruzi. Utilizando el análisis lineal discriminante se ha seleccionado una función con cuatro variables capaz de predecir adecuadamente la CI50 para cada compuesto de las series de entrenamiento y test. El modelo propuesto se ha aplicado a una librería molecular y se han propuesto nuevas estructuras potencialmente activas frente a T. cruzi.A topological-mathematical model has been arranged to search for new derivatives of bisphosphonate compounds acting as inhibitors against Trypanosoma cruzi hexokinase. By using linear discriminant analysis, a four-variable function was achieved allowing an accurate prediction of the IC50 for each compound of the training and test series. After carrying out a virtual screening based upon such a model, new structures potentially actives against T. cruzi are proposed.Este trabajo ha sido posible gracias al Fondo de Investigación Sanitaria, Ministerio de Sanidad, España (proyecto SAF2005-PIO52128) y al Máster Internacional en Enfermedades Parasitarias Tropicales, Universidad de Valencia

    Aplicación de la topología molecular en la predicción de la inhibición de Trypanosoma cruzi Hexokinasa y un grupo de derivados bifosfonatos

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    A topological-mathematical model has been arranged to search for new derivatives of bisphosphonate compounds actingas inhibitors against Trypanosoma cruzi hexokinase. By using linear discriminant analysis, a four-variable function wasachieved allowing an accurate prediction of the IC50 for each compound of the training and test series. After carryingout a virtual screening based upon such a model, new structures potentially actives against T. cruzi are proposedSe ha desarrollado un modelo topológico-matemático para la búsqueda de nuevos derivados bisfosfonatos activosfrente a la hexokinasa de Trypanosoma cruzi. Utilizando el análisis lineal discriminante se ha seleccionado una funcióncon cuatro variables capaz de predecir adecuadamente la CI50 para cada compuesto de las series de entrenamientoy test. El modelo propuesto se ha aplicado a una librería molecular y se han propuesto nuevas estructuraspotencialmente activas frente a T. cruzi
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