562 resultados para Analise e comparação filogenética


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Lianas play a key role in many tropical forests ecosystems, contributing to community abundance, diversity and structure. Techniques to census lianas and estimate biomass have been used mainly in tropical forests. The aim of this study was to verify if different measurement location on the stem and inclusion criteria influence the estimations of liana abundance and biomass in Cerrado. The study was carried out at Itirapina fragment (ca 260 ha) located in Sao Paulo, Southeast Brazil. We measured all apparent ramets of rooted lianas by using different inclusion criteria: >= 0.5 cm in diameter at 30 cm basal area (D_30), and at 130 cm diameter breast height (DBH), in 36 transects (10 x 25 m). We compared the biomass using the allometric equation based on data from tropical florest take at 130 cm (DBH) and other The allometric biomass equation development to estimate the aboveground biomass of live lianas in tropical forests (DAP = 130 cm) was used. We tested the liana biomass, based on measurements taken at (D_30) using two different conversion equations. The results did not show significant differences in liana abundance and above ground biomass estimated applying the different criteria of inclusion However the biomass estimated from data collected at D_30 and converted into DAP showed a tendency to increase in biomass. Our findings suggest that the protocol used to the census of liana and the allometric biomass equation proposed to forests can be applied in the Cerrado.

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The knowledge of the mechanical properties of nickel-titanium (NiTi) termoactives of the more accessible of the domestic market is still limited. Given this, the objective of this study was to evaluate and compare through deflection tests in brackets NiTi wires 03 term rectangular gauge 0.014 '' enabled x 0.025 '' and 0.016 '' x 0.022 '' of different brands (MORELLI (R), ORMCO (R) ORTHOSOURCE (R), ORTHOMETRIC (R), EURODONTO (R) and ADITEK (R)). All tests were carried out on universal testing machine EMIC DL 2000 under identical conditions and controlled at a temperature of 36 degrees C +/- 0.5 degrees C. Five measurements (N= 5) were performed for each thickness/wire tag that was deflected up to a limit of 4.0mm at a speed of 1.0mm/min. Each 0.2mm (round trip) of corresponding strength measured deflection for the construction of the graph of force x deflection at Tesc program version 3.04. Each graphic was evaluated according to the following variables: beginning of the Martensitic transformation (cN and mm), maximum strength (cN), the beginning and end of the plateau of deactivation (cN and mm) and length (mm) plateau. The average and standard deviation were calculated for all variables and statistical analysis was made by ANOVA tests 2 criteria and Turkey or Kruskal-Wallis and Dunn, a 5% level of significance. The results showed that the tests of 0.014 '' x0.025 '' ORTHOMETRIC (R) brands and ORMCO (R) showed the best results, as well as the wires of the MORELLI (R) and ORTHOSOURCE (R) to wires 0.016 '' x0.022 ''. In General, the gauge wires 0.014 '' x0.025 '' showed strength levels on the plateau of deactivation to 6 x smaller than 0.016 '' x0.022 '' caliber.

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To design connections between timber parts with metal dowels (nails or bolts), two phenomena must be considered: bending of the metal dowel and the embedment strength in the wood. The Brazilian Standard ABNT NBR 7190:1997 proposes the methods used in the laboratory tests to determine the embedment strength with the metal dowell and, in the absence of testing, specifies relations to calculate the embedment strength from the compression strength. The aim of this research was to compare the embedment strength values obtained by experimental tests and calculated by the relationships established by the Brazilian Standard ABNT NBR 7190:1997. By the results of the hypothesis tests, it was possible to conclude that the estimate of the embedment strength parallel to the grain proposed by the Brazilian standard ABNT NBR 7190:1997, establishing equivalence with the strength compression results in the same direction, must be effective to the wood species Pinus taeda L., however, the same was not found in the perpendicular direction with respect to the grain, possibly explained by the alpha(e) values in the equation to calculed fe(90)

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Pós-graduação em Zootecnia - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This research analyzes the development of motor skills of kicking andhitting 60 children, six years old, from three schools in the city of Bauru. Thestudents were videotaped performing the task of kicking and hitting. Thecollected data were analyzed by three independent evaluators who rated theskills in development stages (early, elementary and mature), following thecharacteristics presented by Gallahue and Ozmun (2005), adding two morecategories: beginner / intermediate, elementary / intermediate. The resultsshowed that there were differences between the skills of kicking and hitting.This may be related to cultural aspects. Also found that most children havenot reached the mature stage of development the two skills, which is contraryto that expected in the literature.

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Years after the constructivism theory was adopted by “Parameters for National Syllabuses”, the results have pointed to a worse performance in teaching and learning with regards to reading and writing. This article presents the conclusions proceeding from investigation about the probable reasons for the student’s lack of success in reading and writing, and its relation to Emília Ferreiro’s constructivism proposals. Interviews were made as well as sit in class observation were done, with twenty teachers at six Fundamental Level 1 schools in Ourinhos, SP State, in schools that had been awarded the best and the worst performance rating in the Prova Brasil-2005, with this objective: to know and analyze the teacher’s conceptions under their practices and their practices in the classes. The conclusion is: it is not possible to attribute the students’ lack of success in reading and writing; these studies showed that many teachers, most of them, have a non-constructivist concept of teaching and learning, it means that they do not apply Ferreiro’s researches.

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The objective of this is study is to point inter-institutional partnerships in Information Science formed through co-authorship network. More specifically, we calculate indicators of centrality degree, betweenness centrality and closeness centrality, and analyze the relationships between the grades attributed by CAPES - Coordination for the Improvement of Higher Education Personnel - to the institutions and the indicators on the network, checking whether there is proximity and similarity between network indicators and CAPES's grades. Our corpus consisted of all articles published in the four journals in the field of Information Science in Brazil, with regular publications, based in SciVerse Scopus, for the 2010- 2012 period. We retrieved 237 articles, 58 co-authored, with 117 participant institutions. We conducted the analysis of relations between institutions with greater grades by CAPES and the network through centrality indicators. It was concluded that these network indicators and CAPES concepts are articulated, harmonizing these two categories of indicators.