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Este artículo acerca al lector a la historia de la Agregaduría Laboral de la Embajada española en Bonn durante los años sesenta. Analiza las motivaciones, las actividades, la estructura, los objetivos, los logros y los fracasos de esta peculiar institución franquista al servicio de los emigrantes españoles en la República Federal de Alemania. Se centra en la gestión del primer agregado, Luis E. Sorribes, quien concibió su trabajo como una cruzada contra la labor de socialización democrática entre los emigrantes españoles que desplegaban los sindicatos alemanes y las organizaciones antifranquistas.
Apresentamos e discutimos resultados preliminares relativos à caracterização e evolução dos procedimentos de alunos do 3.º ano quando resolvem tarefas de multiplicação. Estes inserem-se numa investigação que pretende compreender como os alunos desenvolvem o sentido de número, nos aspetos associados à multiplicação, no âmbito de uma trajetória de aprendizagem. A análise das produções dos alunos e episódios relativos às discussões coletivas revela grande diversidade de procedimentos. Evidencia também a sua evolução, verificandose, em certos casos, o retorno a procedimentos menos potentes, associado a particularidades das tarefas.
This work is the synthesis of organometallic complexes of Mo(II) starting from the precursor [Mo(_3-C3H5)(CO)2(NCMe)2X] and substituting two NCMe ligands for binuclear ligands containing atoms L-L nitrogen donors derived from RNCH = CHNR, where the R groups are bulky. The ligand X, which is a halogen, can be replaced by neutral ligands and give rise to cationic complexes. Was synthesized a family of complexes of Mo(II) containing diazabutadiene ligands with varying substituents, which were isolated and characterized by spectroscopic techniques (infrared, UV-visible and NMR) and elemental analysis. Where possible, the complexes were structurally characterized by X-ray single crystal. Structural characterization identified two isomers for these complexes in the solid state, the equatorial, where the two nitrogen atoms of diazabutadiene l...
Eukaryotic gene expression involves a series of interconnected steps from transcription to protein synthesis, in which mRNAs are the key mediators along this process. Even though eukaryotic gene expression complexity allows a tight control of protein production at several levels, it also makes this process vulnerable to errors that can occur along the mechanism. Eukaryotic cells have developed elaborated mechanisms of mRNA quality control that ensure genetic expression fidelity through detection and degradation of faulty transcripts. Two examples of these mRNA quality control mechanisms are the NMD (Nonsense-mediated mRNA Decay), which can recognise and degrade mRNA with premature stop codons, and the NSD (Nonstop mRNA Decay) which degrades mRNAs without any in frame termination codons. The exosome is an evolutionarily conserved protei...
Tese de mestrado. Biologia (Biologia da Conservação). Universidade de Lisboa, Faculdade de Ciências, 2011
Trabalho de Projecto de mestrado, Ciências da Educação (Formação de Adultos), Universidade de Lisboa, Instituto de Educação, 2011
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