Dificuldades e alternativas encontradas por licenciandos para o planejamento de atividades de ensino de óptica para alunos com deficiência visual

Partial outcomes of a study aimed to verify future High School teachers performance during the development of a Teaching Practice undergraduate course. The student teachers were asked to plan, elaborate and teach, in a classroom situation, optics topics to a class which included visual handicapped pupils. Data analysis shows that the main difficulties found by the student physics' teachers are related to which approach will be used to perceive phenomena dependent on vision and also to the need to break away from traditional pedagogy.. On the other hand, as alternatives, future teachers have shown creativity in order to overcome passive aptitudes related to this educational problem, working out methodological strategies that do not require the knowing/seeing relation, as well as, emphasizing oral communication within the physics teaching context. Copyright by the Sociedade Brasileira de Física.Departamento de Física e Química Faculdade de Engenharia Universidade Estadual Paulista Júlio de Mesquita Filho, Campus de Ilha Solteira Solteira, SPDepartamento de Educação Faculdade de Ciências Universidade Estadual Paulista Júlio de Mesquita Filho, Bauru, SPDepartamento de Física e Química Faculdade de Engenharia Universidade Estadual Paulista Júlio de Mesquita Filho, Campus de Ilha Solteira Solteira, SPDepartamento de Educação Faculdade de Ciências Universidade Estadual Paulista Júlio de Mesquita Filho, Bauru, S

Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces

Studies analyzing the variability of clay minerals and magnetic susceptibility provide data for the delineation of site-specific management areas since many of their attributes are important to agronomy and the environment. This study aimed to evaluate the spatial variability of clay minerals, magnetic susceptibility, adsorbed phosphorus and physical attributes in Oxisols of sandstones in different geomorphic surfaces. For that purpose, soil samples were collected every 25 m along a transect located within the area where the geomorphic surfaces were identified and mapped. The transect occupied the central portion of 500 ha, where it was also sampled for density purposes with one sample per six hectares. Soil samples were collected at a depth of 0.0-0.2 m. The results of the physical, chemical, mineralogical and magnetic susceptibility analyses were subjected to statistical and geostatistical analyses. The nature of the clay minerals and magnetic susceptibility was dependent on the variation of the soil parent material. High values of magnetic susceptibility were associated with the presence of maghemite and magnetite of coarse size. The spatial variability of crystallinity and the content of Fe oxides, as well as magnetic susceptibility, were dependent on the age of the geomorphic surfaces. The youngest surface had greater spatial variability of these attributes. The iron (goethite and hematite) and aluminum (gibbsite) oxides in the youngest geomorphic surface influenced the low values of soil density and high values of total pore volume, micropores and P adsorption. The characterization of the spatial variability of Fe oxides and susceptibility allowed for the delineation of homogeneous areas

Aplicação materna de glicocorticoide nos parâmetros vitais de cordeiros nascidos a termo e prematuros

O objetivo deste trabalho foi avaliar a influência do glicocorticoide sobre parâmetros vitais de cordeiros nascidos a termo e prematuros, do nascimento às 48 horas de vida. Foram constituídos quatros grupos: PN (cordeiros nascidos de parto normal, n=15, média de 146 dias); PNDEX (cordeiros nascidos de parto normal, cujas mães receberam 16mg de dexametasona aos 141 dias de gestação, n=8, média de 143 dias); PRE (cordeiros prematuros nascidos de cesarianas aos 138 dias de gestação, n=10); e PREDEX (cordeiros prematuros nascidos de cesarianas aos 138 dias de gestação, cujas mães receberam 16mg de dexametasona dois dias antes, n=9). As frequências cardíaca e respiratória variaram ao longo do período, com os maiores valores nos grupos de partos normais. A temperatura retal diminuiu em todos os grupos nos primeiros 60 minutos de vida, sendo os menores valores observados nos cordeiros prematuros, e o escore Apgar foi mais alto nos animais nascidos em tempo gestacional normal. Os cordeiros prematuros apresentaram menor vitalidade e menor taxa de sobrevivência, entretanto, menor taxa de mortalidade foi observada nos prematuros sob influência da dexametasona