ABSTRACT
ABSTRACT This study evaluated the quality of heartwood and sapwood from mature trees of three species of Eucalyptus, by means of the qualification of their proportion, determination of basic and apparent density using non-destructive attenuation of gamma radiation technique and calculation of the density uniformity index. Six trees of each species (Eucalyptus grandis - 18 years old, Eucalyptus tereticornis - 35 years old and Corymbia citriodora - 28 years old) were used in the experimental program. The heartwood and sapwood were delimited by macroscopic analysis and the calculation of areas and percentage of heartwood and sapwood were performed using digital image. The uniformity index was calculated following methodology which numerically quantifies the dispersion of punctual density values of the wood around the mean density along the radius. The percentage of the heartwood was higher than the sapwood in all species studied. The density results showed no statistical difference between heartwood and sapwood. Differently from the density results, in all species studied there was statistical differences between uniformity indexes for heartwood and sapwood regions, making justifiable the inclusion of the density uniformity index as a quality parameter for Eucalyptus wood.
Subject(s)
Wood/anatomy & histology , Eucalyptus/anatomy & histology , Gamma Rays , Quality Control , Specific Gravity , Wood/analysis , BrazilABSTRACT
Objetivo: O objetivo deste estudo foi traçar um perfil epidemiológico das uveítes, observando, entre outros, a prevalência da doença nos tipos que a classificam. É um trabalho tranversal, individual e descritivo.Foram analisados 160 pacientes (174 olhos), atendidos no Hospital regional de São José, onde realizou-se a anamnese e o exame oftalmológico, no período compreendido entre 1 de fevereiro de 1992 a 30 de janeiro de 1996. Todos os pacientes que preencheram o critério diagnóstico foram incluídos no estudo...