Arantes, Marina Donária Chaves  Trugilho, Paulo Fernando Moulin, Jordão Cabral  Goulart, Selma Lopes Baraúna, Edy Eime Pereira  Abreu Neto, Raul de <br/><br/>
Anatomy of Charcoal and Carbonization Effect under Eucalyptus Fibers’ Dimensions 

<br/><br/> Publicação on-line; 17 ref.; 3 tables; 3 illus.; Summary (En) 
<br/><br/> <br/><br/>Abstract<br/><br/>The anatomy of wood and charcoal was analyzed by scanning electron microscopy in three radial positions of E.<br/>urophylla and E. Grandis in different diameter classes at six years. The carbonization process was given in the muffle<br/>with an average rate of 0.5 °C increment per minute, using initial temperature of 150 °C and maximum of 450 °C.<br/>It was observed that the pore diameter presented higher values in the samples obtained in the internal position.<br/>The diameter classes of the trees almost did not influence the characteristics of the fibers. In the external position<br/>(close to the shell) fibers with higher values of cell wall thickness and smaller values of lumen diameter and width<br/>were identified. The fiber lumen diameter was not affected by the wood carbonization process, whereas the cell wall<br/>thickness and fiber width were reduced.<br/><br/>Keywords: thermal wood degradation, scanning electron microscopy, pores and fibers of charcoal. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CARVÃO VEGETAL<br/>POROSIDADE<br/>FIBRA<br/>MICROSCOPIA ELETRÔNICA