92 research outputs found
Feeding entrainment of locomotor activity rhythms, digestive enzymes and neuroendocrine factors in goldfish
©2007. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This document is the Accepted version of a Published Work that appeared in final form in Journal of PHYSIOL BEHAV. To access the final edited and published work see http://doi: 10.1016/j.physbeh.2006.10.017L.M. VERA, N. DE PEDRO, E. GÓMEZ-MILÁN, M.J. DELGADO, M.J. SÁNCHEZ MUROS, J.A. MADRID, F.J. SÁNCHEZ-VÁZQUEZ. Feeding entrainment of
locomotor activity, digestive enzymes and neuroendocrine factors in goldfish.
PHYSIOL BEHAV 90 (2-3) 518-524, 2007. The existence of food anticipatory activity
(FAA) in animals subjected to daily feeding schedules seems to be mediated by a
feeding-entrainable oscillator (FEO). Such an FEO may help in anticipating meal time
and so optimizing food acquisition and nutrient utilization. In this study we investigated
the existence of FAA and whether digestive enzymes, plasma cortisol, hypothalamic
NPY and gastrointestinal tract (GIT) and plasma melatonin were entrained by periodic
feeding in goldfish. We observed that periodically fed goldfish showed FAA in
locomotor activity as well as in amylase and NPY. Alkaline protease and GIT melatonin
were higher after feeding, whereas plasma cortisol levels were reduced. Plasma
melatonin remained unmodified before and after meal time. These results suggested that
scheduled feeding entrained both behavioral and certain physiological patterns in
goldfish, FAA being of adaptive value to anticipate a meal and prepare the digestive
physiology of fish
Evidence for surface uplift of the Atlas Mountains and the surrounding peripheral plateaux: Combining apatite fission-track results and geomorphic indicators in the Western Moroccan Meseta (coastal Variscan Paleozoic basement)
This work represents an initial attempt to link the evolution of the topography in relation to the general tectonic framework of western Morocco. For this purpose, in a section of the Western Moroccan Meseta different tools are combined in order to attain the general objective. Apatite fission-track (AFT) data of granitic rocks of the Rabat–Khenifra area give ages around 200 Ma with track length distributions which are compatible with the thermal models already established for the area. An inverse correlation between AFT ages and elevation is observed which is compatible with previous models indicating northward tilting of the whole Western Moroccan Meseta which is younger than 20–25 Ma. In order to test this possibility a detailed analysis of the topography at different scales in the Western Moroccan Meseta has been performed. Results indicate that two open folds with different amplitudes are recognized and that the one with wider wavelength could correspond to a lithospheric fold as previously stated by other authors on the basis of independent geological arguments. The northward tilting proposed based on the AFT data agrees with the results obtained in the analysis of the topography which reinforces the presence of a very open fold with a wavelength of 200–300 km in the north-western limb of the Western Moroccan Meseta
El modelo integrador y de innovación docente del Grado en Veterinaria de Zaragoza: integración en équidos
Desde hace cuatro años se ha comenzado a impartir en la Universidad de Zaragoza el nuevo Grado en Veterinaria, de 300 créditos ECTS distribuidos en 5 cursos. En el diseño de este nuevo Plan de Estudios se ha tratado de dotar a la Titulación de un enfoque basado, fundamentalmente, en las competencias que la profesión exige y la sociedad necesita de un t itulado (graduado) en veterinaria. Tras una formación inicial básica el alumno llega al CUARTO CURSO del grado, en el que las materias se han organizado en asignaturas siguiendo una estructura totalmente novedosa para los estudios de veterinaria en España. Como consecuencia de esta nueva estructura desaparecen como tales muchas de las asignaturas tradicionales que han estado presentes como asignaturas propias (con denominaciones idénticas o similares) en la práctica totalidad de los planes de estudio de veterinaria españoles desde la década de los 70 del siglo pasado. Al cursar estas asignaturas, los alumnos de esos planes, estudiábamos las particularidades de las diferentes especies animales de interés veterinario desde el enfoque, inevitablemente compartimentalizado, de esas asignaturas
Fitting the integrated Spectral Energy Distributions of Galaxies
Fitting the spectral energy distributions (SEDs) of galaxies is an almost
universally used technique that has matured significantly in the last decade.
Model predictions and fitting procedures have improved significantly over this
time, attempting to keep up with the vastly increased volume and quality of
available data. We review here the field of SED fitting, describing the
modelling of ultraviolet to infrared galaxy SEDs, the creation of
multiwavelength data sets, and the methods used to fit model SEDs to observed
galaxy data sets. We touch upon the achievements and challenges in the major
ingredients of SED fitting, with a special emphasis on describing the interplay
between the quality of the available data, the quality of the available models,
and the best fitting technique to use in order to obtain a realistic
measurement as well as realistic uncertainties. We conclude that SED fitting
can be used effectively to derive a range of physical properties of galaxies,
such as redshift, stellar masses, star formation rates, dust masses, and
metallicities, with care taken not to over-interpret the available data. Yet
there still exist many issues such as estimating the age of the oldest stars in
a galaxy, finer details ofdust properties and dust-star geometry, and the
influences of poorly understood, luminous stellar types and phases. The
challenge for the coming years will be to improve both the models and the
observational data sets to resolve these uncertainties. The present review will
be made available on an interactive, moderated web page (sedfitting.org), where
the community can access and change the text. The intention is to expand the
text and keep it up to date over the coming years.Comment: 54 pages, 26 figures, Accepted for publication in Astrophysics &
Space Scienc
Desarrollo de una aplicación informática para aprender clínica y producción equina jugando al Trivial
Introducción/objetivos: esta iniciativa surge de la puesta en común de experiencias docentes en las I Jornadas de Innovación Docente en Medicina y Cirugía Animal (Córdoba, 2011). Allí se presentaron algunas actividades que utilizan el éxito de metodologías basadas en concursos y competiciones, que consiguen que los alumnos las adopten fácilmente como métodos de aprendizaje.La actividad propuesta se basa en el popular juego TRIVIAL™ en el que equipos de alumnos contestan cuestiones de una batería de preguntas sobre veterinaria equina. Las preguntas están agrupadas por sistemas/especialidades.Se persigue crear un sistema de aprendizaje y autoevaluación formativa, que permita la evaluación de conocimientos adaptados al nivel de los alumnos de S~ del Grado en Veterinaria. Además de autoevaluar sus propios conocimientos sin la presión de un examen formal, el alumno practica la dinámica de grupo. La competitividad generada entre equipos estimula el trabajo individual y de grupo (...
Acceptability and feasibility of a virtual community of practice to primary care professionals regarding patient empowerment : A qualitative pilot study
Background: Virtual communities of practice (vCoPs) facilitate online learning via the exchange of experiences and knowledge between interested participants. Compared to other communities, vCoPs need to overcome technological structures and specific barriers. Our objective was to pilot the acceptability and feasibility of a vCoP aimed at improving the attitudes of primary care professionals to the empowerment of patients with chronic conditions. Methods: We used a qualitative approach based on 2 focus groups: one composed of 6 general practitioners and the other of 6 practice nurses. Discussion guidelines on the topics to be investigated were provided to the moderator. Sessions were audio-recorded and transcribed verbatim. Thematic analysis was performed using the ATLAS-ti software. Results: The available operating systems and browsers and the lack of suitable spaces and time were reported as the main difficulties with the vCoP. The vCoP was perceived to be a flexible learning mode that provided up-to-date resources applicable to routine practice and offered a space for the exchange of experiences and approaches. Conclusions: The results from this pilot study show that the vCoP was considered useful for learning how to empower patients. However, while vCoPs have the potential to facilitate learning and as shown create professional awareness regarding patient empowerment, attention needs to be paid to technological and access issues and the time demands on professionals. We collected relevant inputs to improve the features, content and educational methods to be included in further vCoP implementation. Trial registration: ClinicalTrials.gov, NCT02757781. Registered on 25 April 2016
Evidence for a mixed mass composition at the `ankle' in the cosmic-ray spectrum
We report a first measurement for ultra-high energy cosmic rays of the
correlation between the depth of shower maximum and the signal in the water
Cherenkov stations of air-showers registered simultaneously by the fluorescence
and the surface detectors of the Pierre Auger Observatory. Such a correlation
measurement is a unique feature of a hybrid air-shower observatory with
sensitivity to both the electromagnetic and muonic components. It allows an
accurate determination of the spread of primary masses in the cosmic-ray flux.
Up till now, constraints on the spread of primary masses have been dominated by
systematic uncertainties. The present correlation measurement is not affected
by systematics in the measurement of the depth of shower maximum or the signal
in the water Cherenkov stations. The analysis relies on general characteristics
of air showers and is thus robust also with respect to uncertainties in
hadronic event generators. The observed correlation in the energy range around
the `ankle' at differs significantly from
expectations for pure primary cosmic-ray compositions. A light composition made
up of proton and helium only is equally inconsistent with observations. The
data are explained well by a mixed composition including nuclei with mass . Scenarios such as the proton dip model, with almost pure compositions, are
thus disfavoured as the sole explanation of the ultrahigh-energy cosmic-ray
flux at Earth.Comment: Published version. Added journal reference and DOI. Added Report
Numbe
The exposure of the hybrid detector of the Pierre Auger Observatory
The Pierre Auger Observatory is a detector for ultra-high energy cosmic rays.
It consists of a surface array to measure secondary particles at ground level
and a fluorescence detector to measure the development of air showers in the
atmosphere above the array. The "hybrid" detection mode combines the
information from the two subsystems. We describe the determination of the
hybrid exposure for events observed by the fluorescence telescopes in
coincidence with at least one water-Cherenkov detector of the surface array. A
detailed knowledge of the time dependence of the detection operations is
crucial for an accurate evaluation of the exposure. We discuss the relevance of
monitoring data collected during operations, such as the status of the
fluorescence detector, background light and atmospheric conditions, that are
used in both simulation and reconstruction.Comment: Paper accepted by Astroparticle Physic
Seasonal changes in plankton respiration and bacterial metabolism in a temperate shelf sea
The seasonal variability of plankton metabolism indicates how much carbon is cycling within a system, as well as its capacity to store carbon or export organic matter and CO2 to the deep ocean. Seasonal variability between November 2014, April 2015 and July 2015 in plankton respiration and bacterial (Bacteria+Archaea) metabolism is reported for the upper and bottom mixing layers at two stations in the Celtic Sea, UK. Upper mixing layer (UML, >75 m in November, 41 - 70 m in April and ~50 m in July) depth-integrated plankton metabolism showed strong seasonal changes with a maximum in April for plankton respiration (1.2- to 2-fold greater compared to November and July, respectively) and in July for bacterial production (2-fold greater compared to November and April). However UML depth-integrated bacterial respiration was similar in November and April and 2-fold lower in July. The greater variability in bacterial production compared to bacterial respiration drove seasonal changes in bacterial growth efficiencies, which had maximum values of 89 % in July and minimum values of 5 % in November. Rates of respiration and gross primary production (14C-PP) also showed different seasonal patterns, resulting in seasonal changes in 14C-PP:CRO2 ratios. In April, the system was net autotrophic (14C-PP:CRO2 > 1), with a surplus of organic matter available for higher trophic levels and export, while in July balanced metabolism occurred (14C-PP:CRO2 = 1) due to an increase in plankton respiration and a decrease in gross primary production. Comparison of the UML and bottom mixing layer indicated that plankton respiration and bacterial production were higher (between 4 and 8-fold and 4 and 7-fold, respectively) in the UML than below. However, the rates of bacterial respiration were not statistically different (p > 0.05) between the two mixing layers in any of the three sampled seasons. These results highlight that, contrary to previous data from shelf seas, the production of CO2 by the plankton community in the UML, which is then available to degas to the atmosphere, is greater than the respiratory production of dissolved inorganic carbon in deeper waters, which may contribute to offshore export
DIRAC: A High Resolution Spectrometer for Pionium Detection
The DIRAC spectrometer has been commissioned at CERN with the aim of
detecting atoms produced by a 24 GeV/ high intensity proton
beam in thin foil targets. A challenging apparatus is required to cope with the
high interaction rates involved, the triggering of pion pairs with very low
relative momentum, and the measurement of the latter with resolution around 0.6
MeV/. The general characteristics of the apparatus are explained and each
part is described in some detail. The main features of the trigger system,
data-acquisition, monitoring and setup performances are also given.Comment: 49 pages, 37 figures. Figures 1, 2, 5 and 28 are removed because of
size limitations imposed by hep-ex. They don't offer essential information.
Latex class file 'elsart.cls' also provide
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