998 resultados para colate detritiche, terreni granulari, prove triax ACU e CSD
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Resumen tomado del autor
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Resumen tomado del autor
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Proyecto realizado en 7 Centros de la provincia de Segovia: en los Colegios p??blicos de Arroyo de Cuellar, Campo de Cuellar, Cha??e, Chatun, Fresneda de Cuellar, Narros de Cuellar y Remondo. Lo llevaron a cabo 24 profesores que ejercen su labor docente en los mismos. Tienen como objetivos: -Vincular la ense??anza al entorno de forma que el medio en que se desarrolla la vida de los alumnos sirva como recurso pedag??gico, -Incardinar la escuela en el Medio. El desarrollo del proyecto pasa por dos fases, ambas parten de un n??cleo central y desarrollan varios m??dulos de trabajo, alrededor de los cuales giran los contenidos, actividades, estrategias y habilidades a desarrollar. En la actividad participan todos los alumnos, total unos 300, siendo para todos los ciclos la base del trabajo los bloques o m??dulos pero cada uno de ellos se adapta a cada ciclo. Proponen una serie de criterios de valoraci??n de la actividad. El trabajo no est?? publicado..
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Resumen basado en el de la publicaci??n
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Resumen basado en el de la publicaci??n
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Traditionally comparative cytogenetic studies are based mainly on banding patterns. Nevertheless, when dealing with species with highly rearranged genomes, as in Akodon species, or with other highly divergent species, cytogenetic comparisons of banding patterns prove inadequate. Hence, comparative chromosome painting has become the method of choice for genome comparisons at the cytogenetic level since it allows complete chromosome probes of a species to be hybridized in situ onto chromosomes of other species, detecting homologous genomic regions between them. In the present study, we have explored the highly rearranged complements of the Akodon species using reciprocal chromosome painting through species-specific chromosome probes obtained by chromosome sorting. The results revealed complete homology among the complements of Akodon sp. n. (ASP), 2n = 10; Akodon cursor (ACU), 2n = 15; Akodon montensis (AMO), 2n = 24; and Akodon paranaensis (APA), 2n = 44, and extensive chromosome rearrangements have been detected within the species with high precision. Robertsonian and tandem rearrangements, pericentric inversions and/or centromere repositioning, paracentric inversion, translocations, insertions, and breakpoints, where chromosomal rearrangements, seen to be favorable, were observed. Chromosome painting using the APA set of 21 autosomes plus X and Y revealed eight syntenic segments that are shared with A. montensis, A. cursor, and ASP, and one syntenic segment shared by A. montensis and A. cursor plus five exclusive chromosome associations for A. cursor and six for ASP chromosome X, except for the heterochromatin region of ASP X, and even chromosome Y shared complete homology among the species. These data indicate that all those closely related species have experienced a recent extensive process of autosomal rearrangement in which, except for ASP, there is still complete conservation of sex chromosomes homologies.