Search results for "Centro"
showing 10 items of 643 documents
Functional variants of 5S rRNA in the ribosomes of common sea urchin Paracentrotus lividus
2012
Abstract We have previously reported a molecular and cytogenetic characterization of three different 5S rDNA clusters in the sea urchin Paracentrotus lividus ; this study, performed at DNA level only, lends itself as starting point to verify that these clusters could contain transcribed genes, then, to demonstrate the presence of heterogeneity at functional RNA level, also. In the present work we report in P. lividus ribosomes the existence of several transcribed variants of the 5S rRNA and we associate all transcribed variants to the cluster to which belong. Our finding is the first demonstration of the presence of high heterogeneity in functional 5S rRNA molecules in animal ribosomes, a f…
Effects of cadmium exposure on sea urchin development assessed by SSH and RT-qPCR: metallothionein genes and their differential induction
2012
In order to study the defense strategies activated by Paracentrotus lividus embryos in response to sub-lethal doses of CdCl2, we compared the induced transcripts to that of control embryos by suppression subtractive hybridization technique. We isolated five metallothionein (MT) cDNAs and other genes related to detoxification, to signaling pathway components, to oxidative, reductive and conjugative biotransformation, to RNA maturation and protein synthesis. RT-qPCR analysis revealed that two of the five P. lividus MT (PlMT7 and PlMT8) genes appeared to be constitutively expressed and upregulated following cadmium treatment, whereas the other three genes (PlMT4, PlMT5, PlMT6) are specifically…
Il museo come infrastruttura urbana
2016
Gli spazi del Museo Riso sono del tutto insufficienti per lo sviluppo di una struttura museale di grandi potenzialità nel campo dell’Arte Moderna e Contemporanea, che da diversi anni anima con innumerevoli attività culturali la città di Palermo. Allo stato attuale gli spazi espositivi ubicati della sede principale di Corso Vittorio Emanuele sono limitati, i servizi d’accoglienza come bookshop e caffetteria sono minimi, e le strutture di servizio, ubicate nella seconda sede di Palazzetto Agnello, come depositi, laboratori, uffici, biblioteca e archivio sono insufficienti e in alcuni casi non esistono. L’ipotesi del progetto qui presentato è di ampliare Riso con nuovi spazi e servizi dislocat…
Estudiantes de Música del Máster de Profesor de Educación Secundaria: creencias, expectativas y valoración de la distribución de créditos
2021
En este estudio cuantitativo de carácter descriptivo se investigan las creencias de 31 estudiantes de la especialidad de Música del Máster de Profesor de Educación Secundaria de la Universitat de València, sus expectativas al cursar este tipo de formación, su valoración de la distribución de los créditos de las asignaturas que lo conforman y diferencias en base al género. Los resultados presentan sus consideraciones para realizar este Máster, su opinión sobre la función docente, la metodología y contenidos que desarrollarán en futuras clases, las expectativas y la valoración de los créditos de las asignaturas del Máster, entre otros.
Historia de la educación : revista interuniversitaria
1995
Resumen tomado de la publicación Uno de los aspectos menos conocidos del exilio republicano de 1936 es su dimensión pedagógica. Los exiliados españoles en su azarosa trayectoria fundaron diversos centros docentes, casi todos ellos en México. Esos colegios del exilio pueden ser calificados de acuerdo con un criterio territorial. Unos se ubicaron en México ciudad y otros en diversas ciudades de provincias. Éstos últimos estuvieron promovidos, en su mayoría, por el Patronato Cervantes, entidad en la órbita del sector negrinista del exilio. El Patronato promovió colegios Cervantes en las localidades de Córdoba, Tampico, Veracruz, Tarreón, Jalapa y Tapachula. Casi todos tuvieron éxito, consiguie…
Non-parametric spectrum cartography using adaptive radial basis functions
2017
This paper presents a framework for spectrum cartography based on the use of adaptive Gaussian radial basis functions (RBF) centered around a specific number of centroid locations, which are determined, jointly with the other RBF parameters, by the available measurement values at given sensor locations in a specific geographical area. The spectrum map is constructed non-parametrically as no prior knowledge about the transmitters is assumed. The received signal power at each location (over a given bandwidth and time period) is estimated as a weighted contribution from different RBF, in such a way that the both RBF parameters and the weights are jointly optimized using an alternating minimiza…
A time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal plane
2019
Abstract Fast-timing measurements at the focal plane of a separator can suffer from poor timing resolution. This is due to the variations in time-of-flight (ToF) for photons travelling to a given detector, which arise from the changes in the implantation positions of the recoil nuclei emitting the γ rays of interest. In order to minimise these effects on timing measurements, a procedure is presented that improves fast-timing data by performing ToF corrections on an event-by-event basis. This method was used to correct data collected with an array of eight LaBr 3 detectors, which detected γ rays from spatially distributed 138Gd recoil-implants at the focal plane of the Recoil-Ion-Transport-U…
Localization of mitochondrial Hsp56 chaperonin during sea urchin development.
2001
We have previously demonstrated that Paracentrotus lividus nuclear genome encodes for the heat shock inducible chaperonin homolog Hsp 56 (1) and that the mature protein is localized in the mitochondrial matrix (2). In this paper we report that constitutive Hsp56 is maternally inherited, in fact it is present in the in unfertilized eggs, and that it has a perinuclear specific localization during cleavage. In the later stages both the constitutive and the heat shock inducible chaperonin has a specific territorial distribution. Moreover following heat shock, the Hsp56 appears in the cytoplasm and in the postmitochondrial supernatant beside the mitochondrial fraction.
The impact of ocean acidification and warming on the skeletal mechanical properties of the sea urchin Paracentrotus lividus from laboratory and field…
2016
Increased atmospheric CO2 concentration is leading to changes in the carbonate chemistry and the temperature of the ocean. The impact of these processes on marine organisms will depend on their ability to cope with those changes, particularly the maintenance of calcium carbonate structures. Both a laboratory experiment (long-term exposure to decreased pH and increased temperature) and collections of individuals from natural environments characterized by low pH levels (individuals from intertidal pools and around a CO2 seep) were here coupled to comprehensively study the impact of near-future conditions of pH and temperature on the mechanical properties of the skeleton of the euechinoid sea …
Linguistic Approach to Support Human Reliability Analysis and Validation Work in Advanced Radiotherapy Technologies
2019
An integrated methodology, that combines Hierarchical Task Analysis (HTA), Cognitive Task Analysis (CTA) and a modified Human Error Assessment and Reduction Technique (HEART), is proposed to identify safety-relevant human actions in innovative and advanced facilities. It is suggested to use in HEART the concept of linguistic expressions for proportion assessment factors. To prove its applicability, a case study is presented. The validation work has related to safety analyses of accidental events that can involve radiological over-exposure of patients during proton therapy treatments carried out by CATANA (Centro di AdroTerapia Applicazioni Nucleari Avanzate) centre, Italy. CATANA is the fir…