1000 resultados para estudiante adulto


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Incluye Bibliografía

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Incluye Bibliografía

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Reglamento y guia del estudiante para el Curso de Analisis Demografico Basico dictado por CELADE-San Jose en 1977. En el primero se especifican la estructura del curso, los mecanismos de aprobacion del mismo, el reglamento de los laboratorios y las normas administrativas del Centro. La guia contiene informacion general sobre el CELADE y el curso asi como una orientacion basica sobre la ciudad de San Jose

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Trees produce different types of woody tissue during growth. The xylem produced in the first years until a certain cambial age is called juvenile wood and has different physical, mechanical, chemical and anatomical characteristics from that produced later, when the cambial cells have matured. Thus, prior knowledge of the quality of the wood is of fundamental importance for choosing the best use of the material. This work aimed at using data from length of the tracheid and wood density to define the age transition from juvenile to mature wood. For this, three Pinus elliottii var. elliottii trees, aged 35 years, were collected at the Itapetininga Experimental Station, located in the state of São Paulo, Brazil. From each tree, disks of about 5 cm thick were obtained 0.05 m above the ground and used to determine the radial density by the gamma ray attenuation method and to measure the length of the tracheids. The results obtained by linear regression analysis showed that juvenile wood is limited to the first seven years of tree growth and the formation of mature wood occurs after twenty years. For the mature wood, there are significant differences among the averages obtained from the tracheid length and wood density.

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Incluye Bibliografía

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Incluye Bibliografía

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Pós-graduação em Enfermagem (mestrado profissional) - FMB

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Educação - FFC