查询词典 physical chemistry

The results showed that there existed variation among eucalypt families in wood physical-mechanical properties and wood chemistry. There were significant differences among E.pellita families、E.grandis families and E.urophylla譋.grandis clones in wood colors as well as between Strains and within trees.The variation of the surface wetability of wood between E.grandis families and E.urophylla譋.grandis clones were significant.Even in the same families level or clones level,there still existed the same regulation. The degree of collapse of eucalypt had a large relation in the amount of tylosis in vessel and vestured pits on the cell wall of vessel. The more rich tylosis and vestured pits in vessels,the more probability to occur collapse for eucalypt.The biggest moment collapse was probably the critical point of the drying degrade.During the fomulation of drying technology,it is necessary to adopt moderate condition to make the vessels which had formed the biggest moment collapse at the biggest moment collapse resume,especially to prevent the permanent set.At the normal temperature level,the main factors which influenced residual collapse were the contents of ray parenchyma and axial parenchyma .Nearly all the cells joined the course of forming the moment collapse and biggest moment collapse.Interval drying was fit for eucalypt plantation which was easier to make collapse.

研究表明：桉树不同家系间木材物理力学性质和化学组成存在差异；粗皮桉家系间、巨桉家系间、尾巨桉无性系间材色存在显著差异，株间、株内木材材色存在变异；桉树木材表面润湿性在巨桉家系间、尾巨桉无性系间存在着显著差异，在同一家系或同一无性系中，株间和株内也存在着相同的变化规律；桉材皱缩程度与其导管中侵填体的多少和导管壁上纹孔具有的附物多少密切相关，侵填体含物越丰富，纹孔附物越多，桉材越容易皱缩；最大瞬间皱缩是能产生更大干燥降等的临界点，在制定干燥工艺时，必须在最大瞬间皱缩发生时，采用温和条件，使已产生最大瞬间皱缩的细胞尽可能多的恢复，尤其不能使其产生永久变定；在常温条件下，影响残余皱缩的主要因子是射线薄壁细胞和轴向薄壁细胞含量；而对于瞬间皱缩和最大瞬间皱缩，几乎所有细胞都参与它们的形成过程；对于易皱缩的桉树木材，间歇干燥是最有前途的干燥方法。

The movement can be divided into two regions, one is the active surface region, the other is the solid region, and it goes under the way of rolling and falling. The heat transfer process in rotary kiln goes with extremely complex physical and chemistry process. Considering the revolving of the kiln body itself and the special movement way of the materials, as well as the influence of the material reaction dynamic parameters, we have established the unidimensional axial heat transfer model for rotary kiln. Then according to the tentative data which has been published, we have testified that the unidimensional axial heat transfer model could reflect the

回转窑内的传热过程伴随着十分复杂的物理化学过程，考虑窑体自身的旋转和物料运动的特殊方式，以及物料的反应动力参数等的影响，建立了回转窑内一维轴向传热模型，并根据已发表的试验数据对建立的一维轴向传热模型进行了验证，该模型可以反应出回转窑内各相沿轴向的温度分布趋势，这样结合热工分析，可以对回转窑的生产和运行给出适用的指导，并力图达到增产节能的效果。

ABSTRACT Inhibition mechanism and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles whose inhibition is caused by chemical adsorption and quaternary ammonium salts whose inhibition is caused by physical adsorption are mainly studied from microscope through quantum chemistry calculation, and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles are studied by making use of model-constructing thought of grey theory in this paper.

本文主要通过量子化学计算，从微观角度研究了化学吸附型缓蚀剂苯腈类化合物和物理吸附型缓蚀剂季铵盐在盐酸溶液中对碳钢缓蚀的缓蚀机理和缓蚀性能与分子结构的关系；并运用灰色理论建模思想，研究了苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀性能与分子结构的关系。其中，通过量子化学计算，从微观角度研究物理吸附型缓蚀剂在盐酸溶液中对碳钢缓蚀的缓蚀机理和缓蚀性能与分子结构的关系，是在尝试着进行；而运用灰色理论建模思想，研究缓蚀剂缓蚀性能与分子结构的关系，是一项具有尝试性和开拓性的工作。

In Loess area, block cloddy was universal existence in farmland surface. The physical and chemistry properties of block cloddy in plow layer were researched in this study.

针对黄土地区农田土壤普遍存在块状结构体的现象，用蜡封法研究了块状结构体的松紧度以及用EDTA滴定法测定了结构体中水溶性Ca(上标 2+)含量。

The organic/inorganic composites, as new materials that combine the inorganic phase"s rigidity,stability and the organic phase"s toughness and workability, have important theoretical and realisticsignificance in materials science. C_(60) is a brand-new holosymmetry spherical molecule with theunique physical and chemical property, displaying wide implications and applications of physics,chemistry, biology, materials science, medicine, electronics, and so on.

有机／无机复合材料集无机相的刚性、稳定性和有机相的韧性、加工性等诸多特性于一体的一类新型材料，具有重要的理论和现实意义。C_(60)是一个全新的全对称球形分子，具有独特的物理、化学性能，已广泛地影响和应用到物理、化学、生物学、材料学、医学、电子学等许多领域。

The physical and chemistry simulation on TSA process was established, and the mechanism of thaumasite formation was taken on further discussion.

摘 要：研究水泥砂浆试件在碳硫硅酸钙型硫酸盐侵蚀过程中的物理化学性能变化，对TSA过程进行模拟，进一步探讨碳硫硅酸钙的形成机理。

The transformation of physical and chemistry performance in the thaumasite form of sulfate attack process on cement mortars.

武汉理工大学，硅酸盐材料工程教育部重点实验室中国混凝土与水泥制品网

The system of nano-structured assembly and molecular assembly is a new field, which is originated from intercrossing and derivatives of physics, chemistry, biology and material science in nanometer scale. It has not only brought the new opportunity to synthesis of new materials, but also opened the new dimension for physical and chemical investigation. The most importance is that it will be the basis of nano-structured device in the future.

纳米结构的组装和分子组装体系是物理、化学、生物学、材料科学在纳米尺度交叉而衍生出来的新的学科领域，它为新材料的合成带来新的机遇，也为物理和化学的研究提供了新的方向，更为重要的是它将成为下一代纳米结构器件的基础。

The ignition of the solid rocket motor is a very complex physical and chemistry process, which is composed of three component phases: ignition delay, flame spreading and chamber filling.

固体火箭发动机的点火是一个十分复杂的物理化学过程，包括三个阶段：点火延迟、火焰传播和燃烧室气体充填。

Chemistry is concerned with the physical and chemical properties, composition and structure of all living and non-living materials, and how we synthesise such materials and modify them for their safe and beneficial use in our modern lives.

化学关注的是物理性质和化学性质、生物和非生物的组成及构造、以及我们如何人工合成这些材料让他们变的安全和在生活中有益的使用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。