 
				| Possibility of using non-destructive spectrophotometery to detect the poplar tension wood and spruce compression wood in freshly cut and dried timbers | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 2, Volume 27, WINTER 4 - Serial Number 41, December 2012, Pages 568-753 PDF (452.96 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2012.109599 | ||
| Authors | ||
| Zinab Frozan* 1; Asghar Taremian2; Janin Gerar3 | ||
| 1MSc. student, Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran. | ||
| 2Assistant Professor, Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran | ||
| 3Senior director research , CRF - INRA, 54280 Champenoux , France | ||
| Abstract | ||
| In this study, the potential use of spectrophotometery and CIELAB technique was evaluated to detect reaction woods, including poplar tension wood and spruce compression wood. Thus, two trees of spruce ( Picea abies) and poplar (Populous nigra) containing reaction wood were cut from a forest belonging to ENGREF (the National Engineering School of Forestry close to Nancy in France). Then, the parameters of lightness (L*) and reflectance (R) were measured in the reaction and normal wood regions in the green and dry conditions. The results showed that in the green condition, the spruce compression wood had less lightness than the normal wood and the lightness of compression wood increased as a result of drying. Difference between the lightness and reflectance parameters of two types of reaction woods and those of their corresponding normal woods was significant in the green condition. Consequently, it can be concluded that the macroscopically detection of reaction wood is easier in the green condition than in the dry one. | ||
| Keywords | ||
| Nondestructive test; spectrophotometery; reaction wood; tension wood; compression wood | ||
| References | ||
| - Altaner, C.M., Tokareva, E.N., Wong, J.C.T., Hapca, A.I., McLean, J.P. and Jarvis, M.C., 2009. Measuring compression wood severity in spruce. Wood Science and Technology, 43(3–4): 279–290. - Badia, M.A., Mothe, F., Constant, T. and Nepveu, G., 2005. Assessment of tension wood detection based on shiny appearance for three poplar cultivars. Annals of Forest Science, 62(1): 43-49. - Burtin, P., Jay-Allemand, C., Charpentier, J.P. and Janin, G., 1998. Natural wood colouring process in juglans sp. ( juglans nigra , juglans regia, and hybrid juglans nigra NG 23 x juglans regia ) depends on native phenolic compounds accumulated in the transition zone between sapwood and heartwood. Trees, 12: 258-264. - Charrier, B., Janin, G., Haluk, J.P. and Mosedale, J.R.,1995. Colour and chemical characteristics of moon rings in oak wood. Holzforschung, 49(4): 287-292. - CIE (1986). Colorimetry. 2nd edn. Central Bureau of Commission Internationale de l’Eclairage, Vienna, Austria, 1986. Publication No. CIE 15.2. - Dogu, A.D., Grabner, M., 2010. A staining method for determining severity of tension wood. Turkish Journal of Agriculture and Forestry, 34(5): 381-392. - Donaldson, L., Radotić, K., Kalauzi, A., Djikanović, D. and Jeremić, M., 2010. Quantification of compression wood severity in tracheids of Pinus radiata D. Don using confocal fluorescence imaging and spectral deconvolution. Journal of Structural Biology, 169(1): 106-115. - Duncker, P., Spiecker, H., 2009. Detection and classification of Norway spruce compression wood in reflected light by means of hyperspectral image analysis. IAWA Journal, 30(1): 59–70. - Keey, R.B., Langrish, T.A.G. and Walker, J.C.F., 2000. Kiln-Drying Of Lumber. Springer, Berlin, 326p. - Nishino, Y., Janin, G., Chanson, B., Detienne, P., Gril, J. and Thibaut, B., 1998. Colorimetry of wood specimens from French Guiana. Wood Science , 44: 3-8. -Nyström, J., Kline, D.E., 2000. Automatic classification of compression wood in green southern yellow pine. Wood and Fiber Science , 32: 301-310. - Onnerud, H., 2003. Lignin structures in normal and compression wood Evaluation by thioacidolysis using ethanethiol and methanethiol. Holzforshung, 57: 377-384. - Perre, P., 2007.Fundamentals Of Wood Drying. European cost A.R.Bo.LOR, Nancy France, 366p. - Tarmian, A., Remond, R., Faezipour, M., Karimi, K. and Perré, P., 2009. Reaction wood drying kinetics: Compression wood in Picea abies and tension wood in Fagus sylvatica. Wood Sci. Technol, 43: 113-130. - Tarmian, A., Sepeher, A., Rahimi, S., 2009. Drying Stress and Strain in Tension Wood: A Conventional Kiln Schedule to Efficiently Dry Mixed Tension/Normal Wood Boards in Poplar. Drying Technology, 27 (10): 1033-1040. - Timell, T.E. 1986. Compression Wood in Gymnosperms. Springer, Berlin, 2150 p. - Warensjö, M., 2003. Compression Wood in Scots Pine and Norway Spruce—Distribution in Relation to External Geometry and the Impact on the Dimensional Stability in Sawn Wood; Doctoral thesis, Swedish University of Agricultural Science, Department of Forest Products and Markets.1-36. - Wenger, K.F. 1984. Forestry Handbook, 2nd ed. New York, Wiley, 1360p. | ||
| Statistics Article View: 646 PDF Download: 623 | ||