Cremonez, Victor Gonçalves  Klitzke, Ricardo Jorge  Silva, Emilin Joma da  Muñiz, Graciela Ines Bolzon de  Nisgoski, Silvana  <br/><br/>
Influence of Age on the Discrimination of Tectona grandis by VIS/NIR Spectroscopy 

<br/><br/> Publicação on-line; 32 ref.; 1 table; 4 illus.; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>Wood color and properties are variables among and within species, and fast and non‑destructive<br/>techniques can be applied to their characterization, being also important in wood marketing<br/>and quality control. This paper evaluated the influence of age on the discrimination of<br/>Tectona   grandis  L.F.  (teak) wood by VIS/NIR spectroscopy. Wood from three ages, with<br/>heartwood and sapwood, were studied, totaling 36 samples per age. Quantitative colorimetric<br/>data, based on CIELAB 1976, visible and NIR infrared spectra were collected from radial and<br/>tangential surfaces in five positions of each sample, in a total of 540 spectra. Both techniques<br/>were adequate for age discrimination in teak wood. Statistical differences were observed in the<br/>chromatic coordinates in heartwood and sapwood for each age. VIS/NIR spectroscopy can be<br/>applied for age discrimination based on teak solid samples and for wood quality control.<br/><br/>Keywords: spectroscopy, species characterization, wood discrimination. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TECTONA GRANDIS<br/>MADEIRA<br/>ESTRUTURA VEGETAL<br/>COLORIMETRIA