讨论了年轮宽度与木材强度性能和干缩性能的关系。
Whether annual ring width markedly affects both strength properties and shrinkage properties of the wood is discussed.
木材都具有优良的声振动性能，木材之间的声振动性能的差别能较直接的反映木材强度差别。
All the lumber has the fine sound vibration performance, the difference of lumber sound vibration performance can the more directly reflect plate intensity difference.
桂酰辅酶A还原酶基因(CCR)控制木质素含量和组成，而且与桉属木材强度特性有密切关联，因此CCR与造纸和实木利用紧密相关。
The Cinnamoyl CoA reductase (CCR) gene is involved in determining lignin content and composition in plant secondary cell walls and has been associated with wood strength characteristics in Eucalyptus.
本文阐述了零距拉伸的原理和应用，着重介绍了零距拉伸在木材纤维强度评价， 物理化学处理对微尺度木材强度的影响，和在古建筑强度评价中的应用前景。
The basic concepts and principles, especially prospects in wood fiber mechanical properties, differential treatment on microsamples and ancient timber structures, have been introduced in this paper.
强度因素是缓慢改变的，并常常是腐朽的木材仍然是可用的衰败的早期阶段。
The strength factor is more slowly altered, and frequently the decayed wood is still usable in the early stages of decay.
采用L9(34)正交实验，考察了引发剂的浓度、反应时间、单体的体积比和PVA用量对木材胶黏剂的剪切强度的影响。
L9 (34) orthogonal experiment was adopted, the effects of concentration of initiator, reaction time, volume ratio of monomers and amount of PVA on shear strength of adhesive were investigated.
其他几个类型的木材也有类似的强度重量比但不容易收获或丰富。
Several other types of wood had similar strength to weight ratios but were not as easily harvested or as plentiful.
简要概述了界面结合力的类型以及木材胶接操作过程中胶合强度的形成过程。
The type of interfacial binding force was discussed in this paper, and formation process of bonding strength during wood gluing operation was also discussed.
种源内木材气干密度、力学强度及胞壁率差异不显著，管胞长、宽和壁厚的差异均显著且高于种源间的差异。
Meanwhile, there were not significant differences in wood air dry density, mechanical strength and cell wall percentage of intra provenance.
随着立地的贫瘠化，木材抗压、抗弯强度增大；
With site deterioration the wood crushing and bending strength is increased.
研究结果表明：高温热压后的板材吸湿性降低，尺寸稳定性好，但热压温度过高会产生木材热分解，冲击强度略有降低。
The results showed moisture adsorption of the platen dried veneer was lower and its dimensional stability was better, but its impact strength dropped when pressing temperature was too high.
本文研究了东北红松、落叶松和黄花落叶松的木材密度和顺纹抗压强度的变异。
Pinus koraiensis, Larix gmelini and Larix olgensis are the species of the most important timber in northeast of China.
杨氏弹性模量是反映树干或板材抗弯、抗压强度的重要指标，是开展林木材质育种研究的重要内容。
MOE reflects log or lumber material anti-bend, important index of the anti-press strength, which is the important contents for developing forest wood breeding.
聚氨酯胶黏剂由于具有无甲醛， 施胶量少，胶接强度高等众多优点，使其在木材工业中的使用量逐步增加。
The consumption of polyurethane adhesives in wood industry is increasing gradually for its advantages, such as formaldehyde free, less adhesive spread, high bonding strength and etc.
有时高强度微波处理能够使落叶松木材的冲击韧性有所提高，这与木材内部的生长应力一定程度的释放有关。
The impact toughness of larch wood can be improved in some microwave irradiation experiments, which is arisen from the release of growth stress of larch wood.
三种沙生灌木材的木片单体制成的板材强度较高；
论文最后对异氰酸酯热压胶接木材的强度与反应程度之间的关系作了初步研究。
Finally, the bonding strength of IC resin and wood under hot pressing was tested. The relationship between bonding strength and reaction degree was analyzed.
在共鸣板的制作中，强度是非常关键的，四开（也叫做“径切面”）木材非常重要。
Because strength is critical in the construction of the soundboard, quarter-sawn(also known as edge-grain)lumber is essential.
防腐处理后的木材经检测其力学强度无明显变化。
The test result showed that the mechanical strength of treated wood was not affected significantly by the methods of treatment. The for…
防腐处理后的木材经检测其力学强度无明显变化。
The test result showed that the mechanical strength of treated wood was not affected significantly by the methods of treatment. The forced ai...
其强度高于当今其他结构板，也可与高强度的木材相媲美。
Its strength is the highest of all structural panels and can catch up with that of the high-strength wood.
通过从天然来源，如木材，被囊动物(海参类)和某些种类的细菌中提取纤维素，研究人员可以制备不同尺寸和强度的晶体。
Deriving cellulose from natural sources such as wood, tunicate (ocean-dwelling sea cucumbers) and certain kinds of bacteria, researchers prepare crystals of different sizes and strengths.
竹材具有相当好的力学性能，其抗拉强度约为木材的2倍，抗压强度约为木材的1.5倍，竹材的比强度高于木材和普通钢材。
It occupies the head of every country. Bamboo has good mechanics performance, the intensity of tension of bamboo is 2 times of that of wood, and intensity of pressure is 1.5 times.
选择合理的砂带粒度，使木材表面的机械结合力与化学结合力的共同作用达到最大，才可以获得较优的胶合强度。
Choose the proper granularity and make the the working together of mechanic and chemical bonding force produce the greatest effect, then better bonding strength can be obtained.
这样就可以通过对植物的专门培育，将强度高的纤维素用于生产煤饼和木材替代品，将强度低的纤维素用于生产纤维质乙醇。
Plants could be specially bred with strong cellulose, for use in briquettes and wood substitutes, or with weak cellulose better suited for cellulosic ethanol production.
介绍了一种双组分水性乙烯基聚氨酯胶粘剂的制备方法，该胶用于木材加工，具有优良的粘接强度、耐水、耐溶剂等特点。
Preparative method of two-components, water-based vinyl polyurethane adhesive was introduced. The adhesive which has good bonding strength. water-and solvent-resistance etc. can used for wood process.
落叶松和软木松木材随着腐朽程度的加重，力学性能迅速衰减，其中抗弯强度降低最为明显，其次是抗压强度，密度变化最小。
Wood density and mechanical properties were rapidly decreased with the increasing decay for larch and pine timber, the most is MOR, then crushing strength, and the density is the smallest.
落叶松和软木松木材随着腐朽程度的加重，力学性能迅速衰减，其中抗弯强度降低最为明显，其次是抗压强度，密度变化最小。
Wood density and mechanical properties were rapidly decreased with the increasing decay for larch and pine timber, the most is MOR, then crushing strength, and the density is the smallest.
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