TOPOCHEMICAL DETECTION OF PHENOLIC COMPOUNDS IN CELL WALL LAYER OF BEECH WOOD (FAGUS ORIENTALIS L.) VENEER AFTER HIGH DRYING TEMPERATURE AND ACCELERATING AGING
In this study the effect of high drying temperature and accelerated aging on topochemical distribution of lignin and phenolic extractives in beech wood veneer sheets was investigated on a cellular level by using UV microspectrop-hotometry (UMSP). For the chemical analysis of accessory compounds was used the high performance liquid chromatography (HPLC). Veneer sheets manufactured from beech (Fagus orientalis L.) log were oven-dried at 100 ℃ and 180 ℃ after peeling process. The surfaces of some veneers were exposed at UV irradiation chamber for 24 h, 48 h and 72 h as the same as 2 months, 4 months and 6 months. The UV microscopic investigation show that after high drying and aging treatment, lignin condensation is occurred and phenolic extractives in parenchyma cells and vessel lumens more situated and show increased absorbance at 278 nm. The HPLC analysis of the treated tissue show distinct signals of catechin and 2, 6-dimethoxy-benzoquinon which are chromophoric structures in discolored beech wood.
Phenolic compounds high performance liquidchromatography (HPLC) UV microspectrophotometry beech wood
Loya Jamalirad Kazem Doosthosseini GeraldKoch Seyed Ahmad Mirshokraie
Department of Wood and Paper Science and Technology,Faculty of Natural Resources, University of Tehr Institute for Wood Technology and Wood Biology,Federal Research Institute of Rural Areas, Forestry a Department of Chemistry, Payame Noor University, Iran
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
34-37
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）