In order to the macroscopic geometry distributions of vascular bundles in Moso bamboo tubes. The circumference of bamboo tubes was measured, used a simple quadratic diameter formula to analyze the differences between the tubes in bamboo culm, and the arrangement of vascular bundles was investigated by cross sectional images of bamboo tubes. The results shown that the vascular bundles were differently distributed in a bamboo tube. In the outer layer, the vascular bundles had a variety of shapes, and were aligned parallel to each other. In the inner layers, the vascular bundles weren't aligned but uniform in shape. It was concluded that the vascular bundle sections arranged in parallel should be separated from the non-parallel sections for the maximum bamboo utilization.

主要通过将完整的维管束从竹材中剥离出来,进行维管束截面面积统计和维管束拉伸性能测试.对维管束面积与拉伸模量和拉伸强度相关性研究发现,拉伸模量和拉伸强度均与维管束呈较好的线性关系,均随着维管束面积的增加而减小.另外,维管束拉伸强度与拉伸模量的线性关系也较好.

By measuring the diameter of a bamboo tube,parallel section of the test materials is obtained,followed by verifica-tion by end surface scanning. The tensile performance testing shows that the average tensile strength is 61.37 MPa,which varies largely within the bamboo tube and between them;tensile modulus averages 8.26 GPa that varies slightly within the bamboo tube and between them,indicating reliability. By analyzing the end face,the specimen’s tensile strength of the fibers to be pulled out is larger,and the more fibers to be pulled out,the larger the intensity.

Bamboo is a radial gradient variation composite material against parasitology and vector biology, but the vascular bundles in inner layer are evenly distributed. The objective is to determine the regular size pattern and Weibull statistical analysis of the vascular bundle tensile strength in inner layer of Moso bamboo. The size and shape of vascular bundles in inner layer are similar, with an average area about 0.1550 mm2. A statistical evaluation of the tensile strength of vascular bundle was conducted by means of Weibull statistics, the results show that the Weibull modulus m is 6.1121 and the accurate reliability assessment of vascular bundle is determined.

使用三点弯曲的方法测试了胶合竹层板不同组坯部位的弯曲弹性模量(MOE),参照胶合木标准AITC-116 2007确定了胶合竹层板的应力分级方法,并对胶合竹层板进行了应力分级.研究结果表明:胶合竹层板的弯曲模量数值均匀,不同位置处的MOE值差异不显著,被测胶合竹层板的MOE值平均为13.5GPa.胶合竹层板的应力等级平均分布在1.9E LAM级和2.0E LAM级.

In order to explore the application prospects of wood extractives in the biomass energy, the several wood extractives were isolated by organic solvent. The results of functional analysis suggested that these wood extractives could accelerate benzene-alcohol's burning, but played a certain role in inhibiting ether's burning. This reslut revealed that the wood extractives had huge potential applications in the field of add-on bioenergy.

Bamboo is widely used in building construction in south China. However, Termites are the natural enemies of bamboo building. Therefore, the inhibition effect of extractives on building bamboo's termite prevention was studied. The results shown that the benzene / ethanol extractives of camphor tree roots, camphor leaves,Cedrus deodara leaves needles, and torch pine leaves had the better toxic effect to termites among the 15 extractives.

C16H10BrCl2NO2, orthorhombic, P2(1)2(1)2(1) (no. 19), a = 7.6061(6) angstrom, b = 9.4475(8) angstrom, c = 21.693(2) angstrom(3), V = 1558.8 angstrom, Z = 4, R-gt(F) = 0.039, wR(ref)(F-2) = 0.089, T = 296 K.