Characterisation of Birch ( Betula papyrifera Marsh . ) wood discoloration during drying

Content Provider	Semantic Scholar
Author	Fuentealba, Daniel Diouf, Papa Niokhor Fortin, Yves Stevanovic, Tatjana
Copyright Year	2008
Abstract	White birch (Betula papyrifera Marsh.) wood is highly appreciated for its clear and uniform coloration. Conversely, discoloration can cause important financial losses due to depreciation of high valued products. However, there is a lack of an understanding of the discoloration development. To understand the origin of white birch wood discoloration during drying, green-wood boards were kiln dried using a conventional program. A complex experimental design was applied in order to understand the chemical change of the extractives onto the discoloration. Both color measurements and chemical characterisation of wood before, during and after drying have been performed. In addition, the boards were examined at three levels of thickness to determine if the chemical changes took place at different locations chosen for sampling. Preliminary results show important variations in phenolic extractives through the board, especially for the condensed tannins (proanthocyanidins) which are most likely participating the reactions causing the birch wood discoloration.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.swst.org/wp/meetings/AM08/proceedings/WS-61.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article