Microfibril angle of Eucalyptus grandis wood in relation to the cambial age

The microfibril angle (MFA) of wood is an important feature, which helps to explain the physical and mechanical behaviour of wood in use. It has been little investigated for wood produced in Brazil, mainly for mature trees. Thus, the objective of this study was to analyze the MFA of Eucalyptus grand...

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Autores principales:	Tarcísio Lima,José, de Oliveira Ribeiro,Alessandra, Rezende Pinto Narciso,Carolina
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2014
Materias:	Microfibril angle Eucalyptus grandis cambial age
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400010
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spelling	oai:scielo:S0718-221X20140004000102014-10-10Microfibril angle of Eucalyptus grandis wood in relation to the cambial ageTarcísio Lima,Joséde Oliveira Ribeiro,AlessandraRezende Pinto Narciso,Carolina Microfibril angle Eucalyptus grandis cambial age The microfibril angle (MFA) of wood is an important feature, which helps to explain the physical and mechanical behaviour of wood in use. It has been little investigated for wood produced in Brazil, mainly for mature trees. Thus, the objective of this study was to analyze the MFA of Eucalyptus grandis at age 25 years in relation to the cambial age. One disk was cut from the base of the stem from each of three trees, where growth rings were marked. From a central strip 3,0 cm wide, 1 cm³ blocks were removed from each growth ring. After sectioned on the tangential face with a sliding microtome, sections of 8 μm thick were macerated. The individual fibres were observed by polarized light microscopy for measurement of MFA. According to the results, i) the MFA decreased from 29,3° (ring nº 1) to 18,9° (ring nº 25); ii) MFA can be estimated by the cambial age - a, according to the equation MFA = 28,1 - 0,35 × a, with R² = 94,7%.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.16 n.4 20142014-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400010en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Microfibril angle Eucalyptus grandis cambial age
spellingShingle	Microfibril angle Eucalyptus grandis cambial age Tarcísio Lima,José de Oliveira Ribeiro,Alessandra Rezende Pinto Narciso,Carolina Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
description	The microfibril angle (MFA) of wood is an important feature, which helps to explain the physical and mechanical behaviour of wood in use. It has been little investigated for wood produced in Brazil, mainly for mature trees. Thus, the objective of this study was to analyze the MFA of Eucalyptus grandis at age 25 years in relation to the cambial age. One disk was cut from the base of the stem from each of three trees, where growth rings were marked. From a central strip 3,0 cm wide, 1 cm³ blocks were removed from each growth ring. After sectioned on the tangential face with a sliding microtome, sections of 8 μm thick were macerated. The individual fibres were observed by polarized light microscopy for measurement of MFA. According to the results, i) the MFA decreased from 29,3° (ring nº 1) to 18,9° (ring nº 25); ii) MFA can be estimated by the cambial age - a, according to the equation MFA = 28,1 - 0,35 × a, with R² = 94,7%.
author	Tarcísio Lima,José de Oliveira Ribeiro,Alessandra Rezende Pinto Narciso,Carolina
author_facet	Tarcísio Lima,José de Oliveira Ribeiro,Alessandra Rezende Pinto Narciso,Carolina
author_sort	Tarcísio Lima,José
title	Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
title_short	Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
title_full	Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
title_fullStr	Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
title_full_unstemmed	Microfibril angle of Eucalyptus grandis wood in relation to the cambial age
title_sort	microfibril angle of eucalyptus grandis wood in relation to the cambial age
publisher	Universidad del Bío-Bío
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400010
work_keys_str_mv	AT tarcisiolimajose microfibrilangleofeucalyptusgrandiswoodinrelationtothecambialage AT deoliveiraribeiroalessandra microfibrilangleofeucalyptusgrandiswoodinrelationtothecambialage AT rezendepintonarcisocarolina microfibrilangleofeucalyptusgrandiswoodinrelationtothecambialage
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Microfibril angle of Eucalyptus grandis wood in relation to the cambial age

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