1,965 research outputs found

    Ecología del género Blaps Fabricius, 1775 en el sudeste ibérico (Coleoptera, Tenebrionidae)

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    Se aborda el estudio de la ecología de las especies del género Blaps Fabricius, 1775 presentes en el sudeste ibérico: Blaps gigas (Linnaeus, 1767), Blaps hispanica Solier, 1848, Blaps lusitanica Herbst, 1799 y Blaps sulcata brachyura (Linnaeus, 1767). Se analiza la distribución espacial y temporal de las especies estudiadas, a lo largo de un ciclo anual, en orden a inferir patrones de relación con el medio en el que se encuentran, analizando la influencia de factores ambientales como el tipo de suelo, vegetación, temperaturas y precipitaciones.Ecology of the genus Blaps Fabricius, 1775 from the south eastern Iberian Peninsula (Coleoptera, Tenebrionidae). The ecologic study of different species in genus Blaps Fabricius, 1775 of the south eastern Iberian Peninsula as Blaps gigas (Linnaeus, 1767), Blaps hispanica Solier, 1848, Blaps lusitanica Herbst, 1799 and Blaps sulcata brachyura (Linnaeus, 1767), was carried out on different habitats. The spatial and seasonal activity during an anual cycle were studied. The influence of several evironmental characteristics as type of soil, vegetation, temperature, rainfall and their effects in the distribution of these species, were also assessed

    Impairments in motor coordination without major changes in cerebellar plasticity in the Tc1 mouse model of Down syndrome

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    Down syndrome (DS) is a genetic disorder arising from the presence of a third copy of human chromosome 21 (Hsa21). Recently, O’Doherty et al. [An aneuploid mouse strain carrying human chromosome 21 with Down syndrome phenotypes. Science 309 (2005) 2033–2037] generated a trans-species aneuploid mouse line (Tc1) that carries an almost complete Hsa21. The Tc1 mouse is the most complete animal model for DS currently available. Tc1 mice show many features that relate to human DS, including alterations in memory, synaptic plasticity, cerebellar neuronal number, heart development and mandible size. Because motor deficits are one of the most frequently occurring features of DS, we have undertaken a detailed analysis of motor behaviour in cerebellum-dependent learning tasks that require high motor coordination and balance. In addition, basic electrophysiological properties of cerebellar circuitry and synaptic plasticity have been investigated. Our results reveal that, compared with controls, Tc1 mice exhibit a higher spontaneous locomotor activity, a reduced ability to habituate to their environments, a different gait and major deficits on several measures of motor coordination and balance in the rota rod and static rod tests. Moreover, cerebellar long-term depression is essentially normal in Tc1 mice, with only a slight difference in time course. Our observations provide further evidence that support the validity of the Tc1 mouse as a model for DS, which will help us to provide insights into the causal factors responsible for motor deficits observed in persons with DS

    The Biological Station Torretes (Ibi, Alicante): a space for the conservation of odonates

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    Los odonatos son indicadores biológicos de la calidad de los medios acuáticos, ya que requieren, en la mayoría de los casos, aguas limpias y bien oxigenadas para desarrollar sus etapas larvarias. Muchas especies han sido incluidas en la Lista Roja de especies amenazadas. Se ha llevado a cabo un estudio de la fauna de Odonatos en la Estación Biológica Torretes - Jardín Botánico de la Universidad de Alicante (Ibi, Alicante), un espacio de bosque mediterráneo de 53 hectáreas, que está gestionado por el Instituto de Investigación CIBIO de la Universidad de Alicante. Este centro está destinado a investigar y difundir el valor de la biodiversidad y la conservación. Se han estudiado diversos puntos de agua permanentes con el objetivo de determinar áreas de conservación de la biodiversidad. En la estación biológica se registraron 16 especies de odonatos de los 28 citadas en ambientes naturales para la provincia de Alicante, lo que resaltan la importancia de este espacio natural en la conservación de estos insectos.Odonates are biological indicators of the aquatic environments quality, because them require, in most cases, clean and well oxygenated waters to develop their larval stages. Many species have been included in the Red List of threatened species for their vulnerability to contaminated environments. A study of odonata fauna was carried out in several permanent water points in the Biological Station – Botanical Garden of Torretes (Ibi, Alicante), a Mediterranean forest space of 53 hectares, managed by the Research Institute CIBIO of the University of Alicante. This center aims to investigate and disseminate the value of biodiversity and conservation. In the biological station was collected 16 species Odonates of the 28 reported in natural environments for the Alicante province, which highlight the importance of this natural space in the conservation and biodiversity of these insects

    Study of the performance and capability of the new ultra-fast 2 GSample/s FADC data acquisition system of the MAGIC telescope

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    In February 2007 the MAGIC Air Cherenkov Telescope for gamma-ray astronomy was fully upgraded with an ultra fast 2 GSamples/s digitization system. Since the Cherenkov light flashes are very short, a fast readout can minimize the influence of the background from the light of the night sky. Also, the time structure of the event is an additional parameter to reduce the background from unwanted hadronic showers. An overview of the performance of the new system and its impact on the sensitivity of the MAGIC instrument will be presented.Comment: Contribution to the 30th ICRC, Merida Mexico, July 2007 on behalf of the MAGIC Collaboratio

    Multistage Switching Architectures for Software Routers

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    Software routers based on personal computer (PC) architectures are becoming an important alternative to proprietary and expensive network devices. However, software routers suffer from many limitations of the PC architecture, including, among others, limited bus and central processing unit (CPU) bandwidth, high memory access latency, limited scalability in terms of number of network interface cards, and lack of resilience mechanisms. Multistage PC-based architectures can be an interesting alternative since they permit us to i) increase the performance of single software routers, ii) scale router size, iii) distribute packet manipulation and control functionality, iv) recover from single-component failures, and v) incrementally upgrade router performance. We propose a specific multistage architecture, exploiting PC-based routers as switching elements, to build a high-speed, largesize,scalable, and reliable software router. A small-scale prototype of the multistage router is currently up and running in our labs, and performance evaluation is under wa

    Prospective observational study of point-of-care creatinine in trauma.

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    Background:Patients with trauma are at risk for renal dysfunction from hypovolemia or urological injury. In austere environments, creatinine values are not available to guide resuscitation. A new portable device, the Stat Sensor Point-of-care (POC) Whole Blood Creatinine Analyzer, provides accurate results in <30 s and requires minimal training. This device has not been evaluated in trauma despite the theoretical benefit it provides. The purpose of this study is to determine the clinical impact of the POC device in trauma. Methods:40 patients with trauma were enrolled in a prospective observational study. One drop of blood was used for creatinine determination on the Statsensor POC device. POC creatinine results were compared to the laboratory. Turnaround time (TAT) for POC and laboratory methods was calculated as well as time elapsed to CT scan if applicable. Results:Patients (n=40) were enrolled between December 2014 and March 2015. POC creatinine values were similar to laboratory methods with a mean bias of 0.075±0.27 (p=0.08). Mean analytical TATs for the POC measurements were significantly faster than the laboratory method (11.6±10.0 min vs 78.1±27.9 min, n=40, p<0.0001). Mean elapsed time before arrival at the CT scanner was 52.9±34.2 min. Conclusions:The POC device reported similar creatinine values to the laboratory and provided significantly faster results. POC creatinine testing is a promising development for trauma practice in austere environments and workup of a subset of stable patients with trauma. Further study is warranted to determine clinical impact, both in hospital-based trauma and austere environments
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