化学
紫杉醇
李子
原花青素
儿茶素
植物
柚皮素
经络
类黄酮
多酚
有机化学
生物
抗氧化剂
作者
Ingo Mayer,Gerald Koch,Jürgen Puls
出处
期刊:Holzforschung
[De Gruyter]
日期:2006-11-01
卷期号:60 (6): 589-594
被引量:38
摘要
Abstract The topochemical distribution of accessory compounds responsible for wood colouration during heartwood formation and processing of black cherry ( Prunus serotina ) is restricted to the axial and ray parenchyma cells. (+)-Catechin, taxifolin, aromadendrin, eriodictyol, naringenin, 4′-methoxynaringenin and prunin were identified in acetone/water extracts. However, the colour of wood after extraction is still reddish-brown, indicating that the coloured material is polymeric (cross-linked, condensed). It was demonstrated that (+)-catechin plays a pivotal role in the development of heartwood colour. Its concentration at the sapwood/heartwood boundary decreases, presumably due to the formation of non-soluble polymeric proanthocyanidins. Heat treatment of heartwood during veneer production intensifies the reddish-brown heartwood colour, probably by promoting the polymerisation of (+)-catechin and other flavonoid monomers.
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