木材

Through the principal components analysis of 27softwoods,we found that the directionality of cell arrangements was accordant with theevolution order of Ginkgoaceae,Pinaceae,Taxodiaceae,Cupressaceae,the more evolutivewood species,the stronger directionality of cell arrangements along radial,but thedirectionality of cell arrangement along the radial of Larix spp.which was abrupt changedspecies was comparatively weak.

通过对27种针叶材的主成分分析，发现木材细胞排列方向性强弱基本符合银杏、松科、杉科、柏科的进化顺序，越是进化的树种木材径向排列的方向性就越强。另外，落叶松属等早晚材急变的木材径向排列比较弱。

This article also discusses neutrosphere and reversion of the flectional wood by using mechanics knowledge and obtains function on length of the compressing wood after reversion. The effect of softening is to direct ratio with softening time within certain scope and the plastic of wood will not increase with the augment of softening time beyond the scope.

运用力学知识对弯曲时木材的中性层、弯曲后的木材的回弹进行了分析；运用数学软件对压缩影响因素与压缩回弹后的木材的长度进行了函数拟合。

The thermo decomposition of fire retardant FRW and its main components boric acid and guanylurea phosphate and the pyrolysis of basswood treated with boric acid, basswood treated with GUP, basswood treated with FRW and untreated basswood was analyzed by thermogravimetry and differential thermoanalysis.

摘 要：采用热重和差热分析法，对木材阻燃剂FRW及其主要组分硼酸B）和磷酸脒基脲、硼酸处理紫椴木材、GUP处理紫椴木材、FRW处理紫椴木材以及未处理紫椴木材进行了系统的热解行为研究。

In order to provide an overall understanding on the basic theory and previous researches of wood chemical rheology, the author discusses some respects on the basis of the common knowledge of deformation and flow, which served as the foundation of wood chemical rheology. These respects include the results by Stein and Tobolsky, such as the correlation between the change of polymolecular structure and stress relaxation, the classification of physical rheology and chemical rheology, the difference between the research on wood chemical rheology and other methods, as well as a kind of non\|continuous method to measure stress relaxation proposed by Tobolsky \%et al.

为了使国内木材科学界对木材的化学流变学的基础理论及其研究概况有一个比较全面的了解，作者在归纳了作为建立木材的化学流变学基础的、关于变形和流动一般理论的基础上，就Stein 和Tobolsky基于高分子构造变化与应力松弛之间的对应关系，关于物理流变学和化学流变学的分类，化学流变学研究与其他方法的不同之处，Tobolsky等关于不连续应力松弛测定方法等内容做了比较详细系统的介绍。

For different silvicultural measures, the mechanical properties of Pinus sylvestris plantations were measured and analyzed. The results showed that the effect of silvicultural measures on many mechanical properties of Pinus sylvestris Plantations were not significant..In order to increase the mechanical properties of wood, growth-promoting and then get the better structure building lumber and glued lamination board, the stands on south slope or at the down of slope, and with density of 1.5m×1.0m, properly thinning could be selected. Results of this study can provide a theoretical base and good guidance for oriented breeding of Pinus sylvestris plantations.

摘 要：对不同培育措施的人工林樟子松木材力学指标进行测试和分析，结果表明：不同的培育措施（初植密度、间伐强度、坡向、坡位）对樟子松人工林木材的绝大多数力学强度指标有显著的影响，可选择阳坡、坡下、1.5m×1.0m、轻度间伐林分进行定向培育，来提高木材力学强度性能，从而加快林木生长，培育高产、优质的结构、建筑用材及胶合板材林。

Long Guan Bingliu of secretary of forestry office leading Party group, hall is judged to be civilization of checkpoint of 50 lumber of countrywide to execute the law for my area one of demonstrative units Ou Zhiwu city is terraqueous big copper of lumber checkpoint and admire north area (mast bend so as to breakstubborn) lumber checkpoint was held uncover card and award.

林业厅党组书记、厅长管炳六为我区被评为全国50个木材检查站文明执法示范单位之一的区直梧州水陆木材检查站和钦北区大铜木材检查站举行了揭牌和授牌。

In the presence of a catalyst, ethyl silicate was mixed with ethanol-water solution to form silica sol, which was impregnated into Alnus nepalensis and Tilia amurensis wood as soon as possible.

文章摘要：在催化剂存在下，使正硅酸乙酯与乙醇-水溶液混合制备硅醇溶胶，迅速将其分别注入到西南桤木和紫椴木材中，令其在室温下反应100min左右得到木材-凝胶，然后采用超临界干燥技术制备木材-SiO2气凝胶。

And Toona sinensis were steam-treated at temperature 70℃ and 90℃ for 4 h and 8 h. The radial gas permeability and tangential gas permeability of the steam-treated specimens were compared with those of non-steam-treated one.

处理条件为：杉木和马尾松木材的汽蒸温度分别为90、100℃，假水青冈和香椿木材的汽蒸温度分别为70、90℃，处理时间分别为4 h和8 h，并对汽蒸处理前后木材的弦向和径向气体渗透性分别进行了测定。

The flow-resistor network and corresponding formula are derived from the structural modelof tracheid,dynamics of fluids and percolation theory,moreover it has been verified by themeasurement.

木材径向和弦向渗透在木材干燥、木材浸渍改性中有较多的应用，这样就使得本文关于针叶材气体渗透三维流阻网络理论具有较大的实际应用意义。

In order to enhance the application of NDE technology into evaluation of safety of ancient wood structure and health situation of old tree in China, this paper mainly discuss the major uses , common techniques and equipment of NDE used in wood preservation.

本文着重论述了无损检测技术在木材保护中的主要用途以及主要的无损检测技术，还介绍了国内外木材保护常用的无损检测仪器，为无损检测技术在我国木材保护中的应用提供参考。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。