Search results for "40"
showing 10 items of 17345 documents
Overwintering Site Fidelity in the European Pond Turtle (Emys orbicularis) in Western Poland
2015
The location of overwintering sites of six male and six female European pond turtles (Emys orbicularis) were studied using radiotelemetry in Western Poland, over a period of four consecutive seasons. Most of the studied individuals overwintered in the same area during the research; most distances between two consecutive overwintering sites were 0–25 m. However, changes related to the overwintering area were observed, and in such cases the distance between overwintering sites on two consecutive seasons could exceed 2 km. These results can support an efficient conservation strategy of the turtle population.
Pole-to-Pole Connections: Similarities between Arctic and Antarctic Microbiomes and Their Vulnerability to Environmental Change
2017
The global biogeography of microorganisms remains poorly resolved, which limits the current understanding of microbial resilience toward environmental changes. Using high-throughput 16S rRNA gene amplicon sequencing, we characterized the microbial diversity of terrestrial and lacustrine biofilms from the Arctic, Antarctic and temperate regions. Our analyses suggest that bacterial community compositions at the poles are more similar to each other than they are to geographically closer temperate habitats, with 32% of all operational taxonomic units (OTUs) co-occurring in both polar regions. While specific microbial taxa were confined to distinct regions, representing potentially endemic popul…
Comparative ultrastructure and carbohydrate composition of gastroliths from Astacidae, Cambaridae and Parastacidae freshwater crayfish (Crustacea, De…
2012
21 pages; International audience; Crustaceans have to cyclically replace their rigid exoskeleton in order to grow. Most of them harden this skeleton by a calcification process. Some decapods (land crabs, lobsters and crayfish) elaborate calcium storage structures as a reservoir of calcium ions in their stomach wall, as so-called gastroliths. For a better understanding of the cyclic elaboration of these calcium deposits, we studied the ultrastructure of gastroliths from freshwater crayfish by using a combination of microscopic and physical techniques. Because sugars are also molecules putatively involved in the elaboration process of these biomineralizations, we also determined their carbohy…
Physicochemical Properties of A New PEGylated Polybenzofulvene Brush for Drug Encapsulation
2019
A new polymer brush was synthesized by spontaneous polymerization of benzofulvene macromonomer 6-MOEG-9-T-BF3k bearing a nona(ethylene glycol) side chain linked to the 3-phenylindene scaffold by means of a triazole heterocycle. The polymer structure was studied by SEC-MALS, NMR spectroscopy, and MALDI-TOF MS techniques, and the results supported the role of oligomeric initiatory species in the spontaneous polymerization of polybenzofulvene derivatives. The aggregation features of high molecular weight poly-6-MOEG-9-T-BF3k-FE were investigated by pyrene fluorescence analysis, dynamic light scattering studies, and transmission electron microscopy, which suggested a tendency towards the format…
The role of two non-indigenous serpulid tube worms in shaping artificial hard substrata communities: case study of a fish farm in the central Mediter…
2019
Understanding the spread and establishment of non-indigenous species (NIS) is one of the primary areas of focus in bioinvasion science and is essential for generating appropriate management strategies in aquaculture. Here we investigated the role of 2 non-indigenous serpulid tube worms (Hydroides elegans and H. dirampha) in shaping the hard substrata communities around a fish farm in the Strait of Sicily over 1 yr (June 2014-June 2015), at 3 mo intervals (September and December 2014, March and June 2015). The mean density values of serpulids were significantly different at each sampling time. The density of serpulids on submerged panels showed a peak in spring (March 2015, after 9 mo) and d…
Estrategias de resolución de problemas en la formación docente. Estudios de casos
2017
Resumen basado en el de la publicación Resumen en inglés La revisión de la literatura científica sobre el aprendizaje basado en problemas muestra divergencias en los planteamientos teóricos y metodológicos de sus principales autores, que acaban reduciendo esta herramienta a la asimilación de contenidos conceptuales a partir del cumplimiento exahustivo del currículo. Se defiende una interpretación del marco curricular para transformar los contenidos en problemas sociales, que respondan a las demandas ciudadanas del alumnado. La teoría de las representaciones sociales es el marco en el que se fundamenta el trabajo, con las ideas espontáneas para conocer los obstáculos que condicionan la praxi…
Luisina Perelmiter. Burocracia plebeya. La trastienda de la asistencia social en el Estado argentino. San Martín: Universidad Nacional de San Martín,…
2019
La literatura que analiza el Estado con una mirada micro-política no es muy amplia en Argentina. Burocracia Plebeya, La trastienda de la asistencia social en el Estado argentino brinda un análisis sociológico del funcionariado medio del Ministerio de Desarrollo Social en Argentina durante los gobiernos de Néstor y Cristina Kirchner y muestra a través de una estrategia etnográfica rigurosa, aspectos esenciales de las prácticas y pensamiento burocrático, detrás de la búsqueda de mayor proximidad con los sectores vulnerables, como meta y forma esencial de lo institucional.
Conferința Anuală a Cercetării în Sociologie și Asistență Socială - ULBS 2018
2019
The ECHR Condemns Prison Overcrowding in Italy: The Total Reorganization of the Institution and the Social Reintegration of the Prisoner
2017
The contribution analyses the current Italian prison system, which has been called upon on to resolve its structural problems. The Council of Europe, in fact, in 2013 condemned Italy for inhuman treatment in its prisons. The principal accusation concerns the problem of overcrowding. The country has responded with solutions such as the application of the open system, which provides cells solely for overnight stays, and dynamic monitoring, an effective system for ensuring order in the institutions. These initiatives aim to promote re-educational activities and the social re-integration of prisoners. In addition, Italian institutions have made greater use of alternatives to custodial penalties…
La vida en resto. Cuerpos y basura en Alicia Duvojne Ortiz, Fernando Brito y Manuel Pinedo
2018
espanolA partir de tres propuestas distintas: la cronica periodistica ?Quien mato a Diego Duarte? Cronicas de la basura de Alicia Dujovne Ortiz (2011), la serie fotografica de Tus pasos se perdieron en el paisaje de Fernando Brito (2009) y la novela Plop (2007) de Rafael Pinedo, se aborda como, en medios diversos (periodismo, imagen y ficcion) se redefine la distincion entre vida y muerte contra su demarcacion inmunitaria. Las tres producciones comparten esta figuracion del cuerpo en tanto desecho y residuo: la cronica de Dujovne lo inserta en el circuito economico de la produccion y el consumo; las fotos de Brito parten igualmente de la condicion de abandono de esos cuerpos y su aplanamien…