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- SourceAvailable from: Malba Barahona[Show abstract] [Hide abstract]
ABSTRACT: This chapter reports a case study that examined the contradictions that emerged around the activity of learning to teach EFL (English as a Foreign Language) in a SLTE (Second Language Teacher Education) program in Chile. This study followed a CHAT framework which views teacher learning as a localized activity. This study examined the contradictions that emerged in two settings: schools and the university program from the perspective of pre-service teachers. The findings of this study contribute to shed light on the dialectical nature of teacher learning and its contradictory dynamics between national policies on education, teacher education programs, between theory and practice, and between the views of pre-service teachers, other stakeholders and the reality of the classroom.Cultural Historical approach: Educational Research in different contexts, Edited by Bento Selau, Rafael Fonseca de Castro, 01/2015: chapter Chapter 4: Contradictions in the Activity of Learning to Teach English in Chile: pages 73-99; EDIPUCRS.
- Respiratory Medicine 08/2014; 108(8). DOI:10.1016/j.rmed.2013.08.046
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ABSTRACT: Persistent pulmonary air leak is the most frequent complication after lung resection, resulting in an increase in postoperative morbidity and mortality. We evaluated the viability, integration, and efficacy of a free peritoneal fat graft as a method for controlling air leak in normal and emphysematous rat lungs. Sixty Wistar rats were divided into two groups: elastase-produced lung emphysema (n = 30) and control (normal) lungs (n = 30). Pulmonary air leak was produced by puncture of the right lower lobe, and aerostasis was attempted by means of intrapulmonary injection of autologous free peritoneal fat graft. Rats in each group (n = 6) were randomly allocated to subgroups and were sacrificed at 7, 14, 21, 30, and 60 days. Then, lungs were removed for histology, morphometry, vessel identification and counting, and immunohistochemistry for caspase 3, vascular endothelial growth factor, and factor VIII. Tissue integration of the free fat grafts was found in all animals in both groups. Vessels stained with India ink inside the fat grafts were present at all assessment periods in both groups. Vascular endothelial growth factor expression was significantly higher in all periods in the emphysema group compared with normal lungs (p < 0.001). There was a significant increase in caspase 3 expression in the emphysema group at 7, 21, 30, and 60 days (p < 0.001). Factor VIII showed a significant increase (p < 0.001) at 30 and 60 days in emphysematous lungs. The use of free peritoneal fat graft was able to control the air leaks in normal and emphysematous rat lungs, with persisting graft viability for as long as 60 days after implantation.The Annals of thoracic surgery 05/2014; 98(1). DOI:10.1016/j.athoracsur.2014.03.027
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