Bureau of national qualitative prison was released 2001 " annatto " national level, 33 the tree is planted return to be mixed for wood of wood of wood of wood of red sandalwood wood, Hua Limu, sweet branch, black acerbity branch, red acerbity branch, ebony, stripe gallinaceous wing wood 8 kinds big, the tree that made clear annatto is planted limits.

國家質(zhì)監(jiān)局于2001年發(fā)布《紅木》的國家標(biāo)準(zhǔn)，將33個(gè)樹種歸為紫檀木五月婷婷超碰在线、花梨木、香枝木、黑酸枝木欧美日韩A片免费观看、紅酸枝木、烏木久久综合精品5555、條紋木和雞翅木8大類在线看片黄a免欧美费，明確了紅木的樹種范圍。

In the aspects of research method, we took the method of preparing sol at first and then impregnating the wood to obtain ceramic-wood composite; this method made the wood use efficiently and increased the wood's weight gain percent. The ceramic-wood composite with performances of well decay resistance, dimensional stability, effloresce resistance and high strength was obtained by importing the cymene to the net of gel as the result of co-hydroxylation between MTES and TEOS. Making use of XPS ,we found that the apex of Si2p、O1s黄色视频免费看不用下载、C1s had evident chemical shift , which validated the existence of Si-O-C bonding.Key Words: Sol-gel, Ceramic-wood composite, Modified sol, Ecomaterials

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Expert analysis, wood veneer furniture, leather furniture, the fashion plate and solid wood furniture, combined with natural beauty, and because they use a white oak wood leather and cherry wood and other rare species, the effect or even better than solid wood furniture, the price of much cheaper than solid wood furniture, so easily accepted by the working-class.

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Puna said the designer kitchen cabinets, solid wood cabinets of pure wood species require a higher consistency, the overall nature and effect; solid wood cabinets with solid wood composite materials for splicing substrate, the surface of paper affixed to wood, the same can visual effects of solid wood; solid wood cabinets at the MDF veneer of wood affixed to the surface of double-skin.

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From view of wood construction effecting, the article analyzes affecting factors of wood main micro-constructions such as tylosis and bored pits in processing of wood chemistry soaking with fire retardants, the article also analyzes existing condition of moisture in wood and relationship between moisture moving in wood and wood chemistry soaking technology treated with fire retardants.

從木材構(gòu)造對化學(xué)阻燃浸漬處理工藝影響的角度人人人人人人人人操人人人人人人人人，指出在木材化學(xué)阻燃浸漬處理過程中，影響阻燃劑在木材中滲透性的木材主要微觀構(gòu)造有浸提物A级毛片不卡观看、紋孔等毛片最新地址，分析了木材中水分的存在狀態(tài)和木材中水分的移動(dòng)與木材化學(xué)阻燃浸漬處理工藝的關(guān)系。

To clarify the interaction between wood primary components based on a molecular level, and to obtain the change information of bonding form between molecules in different soften or decrystallized wood, can not only provide theoretical basis for decrystallization, chemical improvement of wood and wood bending, but also can offer technical parameters for new approach and ways of wood processing and integrated utilize, at the same time can also enrich the wood rheology theory.

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Take DMSO swollen treatment and DEA-SO2-DMSO decrystallization treatment for example, the X-ray diffraction and the Tobolsky's intermittent stress relaxation of treated woods were determined during soaking in water, analyzed the effects of water on crystal degree and inter-cohesion of treated woods. According to these continuous relaxation curves measured in water with different temperatures, various thermodynamic quantities were obtained by using Eyring absolute rate theory, and reviewed the chemical reactions in wood which occur in different relaxation process. For the first time quantify these crosslinkings formed in the process of tensional relaxation by using the SMCIR intermittent stress relaxation way, and defined the cross-linking reaction types. In order to find out the contribute of drying to the fixation of deformation of chemically treated wood, stress relaxation of oven-dry untreated and treated wood was measured during the process of temperature elevation and descend, then analyzed the effect of temperature change on relaxation mechanism of treated oven-dry wood. According to continuous relaxation curves of oven-dry treated wood under various constant temperature, calculated the thermodynamics of relaxation process and discussed the mechanism of molecule change in wood, at the same time, also quantified these cross-linkings produced in wood by intermittent method and on the basis of which the model of molecular change during relaxation process of chemically treated was constructed.

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Principle of least squares,digital image segmentation,digital image treatment and digital image identifying were applied into the research of wood science in this research,the wood cell image of annual ring from annual center to wood edge was analyzed,the modified level set method was applied to segmentate cell image precisely for the first time,the identifying of wood cells and hexagon simulation for wood cells were accomplished with active contour model,which had important potential application value in deepening the research of wood properties to a further step,moreover,had an important significance for improving comprehend on wood micro-properties and enlarging the applicable range of wood.

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The calculation of carbon stock changes for the purpose of accounting for harvested wood products, if so elected, on land that is to be accounted for under either reforested land or elected forest management land shall be based on the total increment of carbon stock growth in the eligible forest minus any changes in soil carbon, minus carbon stocks left over from timber harvest activities, minus carbon stocks from any wood residues from wood mills, minus carbon stocks from wood products used for the purposes of paper, wood chips or other short-lived wood products, minus a carbon release estimate of harvested wood products produced and then destroyed during the commitment period, times a conversion factor from carbon to carbon dioxide equivalent.

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Different cells,cell density and cell shape lead to comparatively great difference in wood properties and physical mechanical properties, change of wood cells affects change of wood properties including wood quality,wood property and all other aspects,and wood properties decide economic value and directly affect manufacturing and utilization of wood,therefore,the research and analysis on wood cell structure become especially important.

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