A geometrical definition, fractal dimension, was introduced in this study to evaluate copper adsorption in woodtreated with copper-containing preservatives. It is based on the assumption that some copper would compete the hydroxyl groups inwood cell wall with water molecules, and therefore influence the fractal dimension of internal wood surfaces revealed by themoisture adsorption in wood. Southern yellow pine (Pinus spp.) specimens were treated with different concentrations of copperethanolamine (Cu-EA) solution to obtain different copper retention levels. Then the adsorption isotherms of untreated and Cu-EAtreated specimens were determined at 4, 15, 30, and 40 ~C to provide the source data for fractal dimension calculation. The resultsshowed that, at all temperatures, the fractal dimension of the internal wood surfaces had a decreasing trend with increasing copperretention. That is, the internal spaces in wood become "thinner" due to the copper adsorption on some hydroxyl groups in wood cellwall. The correlation between the fractal dimension and adsorbed copper ions makes it possible to evaluate the copper adsorption inwood cell wall.

Internal wood surfaces can be treated as fractals, which are between Euclidean geometry and complete randomness.The fractal dimension Dfs is very informative in investigating the roughness of the internal surfaces of wood. In this study, the watersorption isotherms, including adsorption and desorption isotherm, of untreated, benzene-alcohol extracted and delignified (after ben-zene-alcohol extracted) spruce (Cuninghamia lanceolata) were measured at 30*(2. On the basis of these isotherms, the Dfs valueswere calculated by FHH equation, which is based on multimolecular sorption. The results showed that both groups of Dfs values (re-spectively calculated from adsorption and desorption isotherms) of untreated, benzene-alcohol extracted and delignified wood havesame order, that is, untreated>benzene-alcohol extracted≈delignified. Therefore, the conclusion can be made that the ben-zene-alcohol extractives have significant contribution to the fractal geometry of internal wood surfaces. Lignin also has influence onthe fractal geometry, but this influence is very small while compared with that of the extractives. Moreover, the Dfs values calculatedfrom adsorption isotherms are bigger than those from desorption isotherms.

本文较系统地归纳了迄今为止有关绝干状态木材细胞壁构成主成分和抽提成分，水分平衡及非平衡状态下木材细胞壁中吸着水的介电弛豫方面的研究，并对今后的研究方向作了讨论。旨在使木材科学工作者对该领域的研究有一个全面的了解，并能够从中得到启迪和借鉴，把木材中吸着水的介电弛豫研究提高到一个更新，更高的层次上.

针对目前的能源形势，从木质生物质能的储存以及木质生物质能与化石能源产生污染的比较出发，提出了木质生物质在未来能源领域的应用潜力及应用前景。介绍了木质生物质的基本组成和化学组分，木质生物质作为能源的利用途径—直接燃烧、气化、液化和碳化等，以及在其利用技术方面的最新研究进展。旨在引起对木质生物质的能源潜力和木质生物质能转化技术的普遍关注，从而促进该技术的进一步发展。

本研究测定了在水蒸汽流入流出过程中壁纸、椴木三合板、柞木地板块、两面光MDF这4种室内装饰材料的环境湿度调节参数x和y与气积比A/V、试材初含水率及环境温度之间的关系曲线。在此基础上，得到了在水蒸汽流入流出条件下室内装饰环境的湿度设计诺谟图，为科学、全面地进行居住空间的湿度设计奠定了理论基础。