结构体

Result The spindles of oocytes were abnormal at 25℃ for 20 min, and disappeared at 25℃ for 30 min or at 4℃ for 10 min. 5, 10, 20 and 40 μg/ml Cytochalasin B for 2 h had no effects on the spindles of the oocytes. The spindles of oocytes were abnormal in 20 μmol/L colchicines for 1 h, and disappeared in 40 μmol/L colchicines for 1 h. The structure of spindles were perfect for 1-12 h when the oocytes were fixed in 4% paraformaldehyde.

结果］卵母细胞在25℃、20 min时纺锤体异常，25℃、30 min或4℃、10 min时纺锤体缺失；5、10、20和40μg/ml细胞松弛素B作用2 h未对纺锤体产生影响；卵母细胞在20μmol/L秋水仙素中作用1 h纺锤体异常，40μmol/L时作用1 h纺锤体缺失；在4%多聚甲醛中4℃条件下，卵母细胞纺锤体结构以固定时间为1~12 h效果较好。

Monosomic 3, monosomic 5, monosomic 10, trisomic 4 and trisomic 5 as experiment materials, their meiosis behavior of pollen mother cell, pollen characteristics, physiological and biochemical characteristics of anther, section observation of pollen development and the structure of embryo sac were studied, and the effects on the seed set and transmission rate were analyzed.

本文以大白菜同源四倍体小孢子培养产生的且已鉴定为3号单体、5号单体、10号单体、4号初级三体、5号初级三体的非整倍体株系及二倍体株系等为试材，对各材料的结籽率、雄配子传递率进行了统计，并对花粉母细胞减数分裂行为、花粉特性、花粉发育和胚囊结构以及花药生理生化特性等方面进行了观察研究，进而分析了其对大白菜单体n-1雄配子和三体n+1雄配子传递率的影响。

In the rice leaves infected by RDV Yunnan isolate, the distribution of cells full of virus particles formed a belt which was a center of infection and multiplication of virus, around the cells fall of virus particles were some cells with the different extent of lesion as follows: disappearance of membrane system of chloroplasts, there were virus particles in some chloroplasts, and some sine or assembled virions in the mitochodria or cytoplasma but not in nuclei ,and intact subcellular structure in the cell far away from the infected center; In the rice leaves cell infected by Zhejiang isolate, some cells were full of virions, but the distribution of cells didn't form the belt, other cytopathological characters were similar to the cells infected by Yunnan isolate.

RDV云南分离株浸染的水稻叶片中，充满病毒粒体的细胞呈条带状分布，呈现出明显的侵染和增殖中心，在充满病毒粒体的细胞周围，相邻细胞有不同程度的病变，叶绿体膜系统消失，部分叶绿体中含有病毒颖粒，线粒体残体及细胞质中有分散或聚集的病毒粒体，细胞核中未见病毒粒体，离侵染中心较远的细胞中亚细胞结构较完整；RDV浙江分离株侵染的水稻叶片中，部分细胞充满病毒粒体，无明显的条带状分布，其他细胞病理特征与RDV云南分离株侵染的水稻叶片相似。

In crystal, two APC-PY trimers associate into a hexamer by face. The assembly of two trimers within this hexamer is very similar to that of C-phycocyanin and R-phycoerythrin hexamers, but the tight level of the assembly of two trimers within this hexamer is clearly not so much as that of C-PC and R-PE hexamers.

晶体结构中，两个APC-PY的〓三聚体通过面对面的方式缔合成一个〓六聚体，该六聚体内两个三聚体的组装方式十分类似于C-藻兰和R-藻红六聚体，但六聚体内两个三聚体组装的紧密程度上显然不如C-藻兰和R-藻红六聚体。

The article analyses the relationship between the load of pile in the direction and the pile root.The investigation indicates that the carrying capacity has nice adaptability to the soil floor depth the column knocked into and change of the oil floor construction when the plinth depth is larger than 60cm,and the length of the column and the change of the soil floor have little impact on load of pile,whereas load of pile is more sensitive to the anti-sinking and change of column diameter dimension.

分析了基桩竖向承载力与桩体结构的关系，研究表明：承载力在基桩深度大于60cm后对桩体打入土层深度、土层结构变化有良好的适应性，桩长和土层结构的变化对基桩承载力的影响不大，而基桩承载力对止沉盘和桩径尺寸变化敏感。

It has been found that the DNA-binding mechanisms and oxidative cleavage of the macrocyclic single nuclear copper complexes are relevant to the rigidity of macrocycle, substitute groups on the side chain, the shape and structure of the complexes.

对一系列结构不同的单核铜配合物的研究表明，大环配体结构的刚性、配体支链上的取代基、配合物的形状与结构等因素对配合物与DNA的相互作用及对质粒DNA的氧化断裂有显著的影响。

Before treatment,there are abundant microvtlli on the cell surface,many filoplodia on the cell rim,few of endoplasmic reticulums , Golgi complexes and mitochondrions with abnormal structure and lots of free ribosomes in the cytoplasm. The shape of nucleus is irregular with high nuclear-cytoplasmic ratio, many dark pellets of heteromatin and a few of nucleoluses in which there ar...

经1.5×10~2g/L地塞米松处理后，细胞表面微绒毛和丝状伪足显著减少或消失，出现皱褶状和小泡状结构；细胞核形规则，核质比值减小，异染色质团块减少，核仁数目减少、结构致密；细胞质中粗糙型内质网、高尔基体、线粒体数量增多，形态结构典型，游离核糖体减少，这些变化说明地塞米松改变了MGc80-3细胞的超微结构特征，具有明显的诱导分化作用。

For the first time, a screw pile and pile driver system for preventing flood and rushing to deal with an emergency was manufactured. The screw piles of the system is different from screw drills used to sap, and it doesn't push soils out. Analyses, including the screw pile's structural strength analysis and the screw blade's welding analysis, were done by ANSYS, which showed that the screw pile's structural strength is enough and that the distort of the screw blade is small. Testing on the screw pile and pile driver system showed that the system performed stably and could meet the need of preventing flood and rushing to deal with an emergency. A mechanics model of interaction of a screw pile and soil was built, and expressions of torque of screw pile's cylindrical part on the condition of screw pile's crew part being driven into soil fully were gained, then the relation of the torque with screw pitch and out diameter of cylinder, which shows the torque decreases with the screw pitch increasing, and that the torque increases with the out diameter of cylinder increasing, which was according with the experiments of the screw pile's being driven into soils, and thus a screw pile with the best structure was chosen. Experiments of bionic surface showed that, on the condition of certain pressure on the surface, the protruding bionic surface can not reduce adhesion and resistance and that the corrugated bionic surface can reduce adhesion and resistance. An orthogonal experiment of the corrugated bionic surface was done with the factors including the width of protrusion, the space between two protrusions, the trolley's velocity and the vertical surface pressure and with the surface frictional coefficient as the experimental target, and some inclusions were drawn that the best combination of the factors was acquired and that the width of protrusion affected the surface frictional coefficient remarkably.

研制了防汛抢险螺旋桩机系统，提高了沉桩作业效率；利用ANSYS对桩体进行整体结构强度分析以及螺旋叶片的焊接分析，表明桩体结构强度足够，焊接过程中，螺旋叶片的变形小；对整个螺旋桩机系统进行试验，表明该系统性能可靠，工作稳定，作业效率高，能够满足防汛抢险沉桩作业基本需要；建立了螺旋桩桩土作用力学模型，得出螺旋桩沉桩过程中螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩以及扭矩与防汛抢险螺旋桩的螺旋导程和圆柱外径的关系曲线，表明螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩随着螺旋导程的增大而减小，随着圆柱外径的增大而增大，这与螺旋桩沉桩试验结论相符合，据此优选出最佳结构的螺旋桩；仿生曲面试验表明，尺寸较小的球冠突起型仿生曲面在一定压力作用下未能起到减粘降阻的作用，而尺寸较大的波纹型仿生曲面相对平板具有一定的减粘降阻作用；以波纹型仿生曲面突起宽度、波纹型仿生曲面两突起之间间距、台车的牵引速度以及叶片表面垂直载荷为因素，以曲面摩擦系数试验指标进行正交试验，寻求出在一定试验条件下最佳因素水平组合；波纹型仿生曲面突起宽度在本试验条件下对曲面摩擦系数影响显著，而其它几个因素对曲面摩擦系数影响均不显著；通过波纹型仿生曲面突起宽度和台车牵引速度的单因素试验，表明曲面摩擦系数随着仿生曲面突起宽度的增大而减小，而随着台车牵引速度的变化基本保持不变，和正交试验结果保持一致。

The three-faced rotating mirror with honeycomb cellular structure in ultra-high speed camera was presented,and the mechanical traits of such structural three-faced aluminous rotating mirror were analyzed by use of FEM.

提出蜂窝结构的三面体转镜，对这种新型转镜做了结构设计，利用三维有限元计算技术，分析蜂窝结构三面体铝合金转镜的力学性能。

The study also indicated that there is a complementary distribution between"be"passives and"get"passives in English as well as passives with"bei"and passives with other passive markers in Chinese, as"be"passives and passives with"bei"are often used in more formal writings while"get"passives and passives with other markers are more often used in oral language.

研究还表明，由于英语的&be&被动结构和汉语中的&被&句通常用于正式语体，而英语中的&get&和汉语中由&教&、&叫&、&让&和&给&构成的被动句通常用于口语，英语中由&be&构成的被动结构和由&get&构成的被动结构以及汉语中的&被&字句和&教&、&叫&、&让&和&给&构成的被动句在语体上形成互补分布。

He believes organic soil management can help retain moisture and protect against crop failure. The true test came during the devastating drought of2000-02, when Mr Murage's vegetable gardens fared better than his neighbours'. At least 300 farmers have visited his gardens and taken up at least one of the practices he espouses.

他相信土壤的有机管理可以保持土壤水分，防止农作物欠收。2000-2002年的干旱破坏性极大，但是穆拉盖先生的菜园长势比邻居的要好得多，经受住了考验。300多名农场主参观了他的菜园，并且每个人都至少学到了一项他所使用的技术。

Sports and games are also very useful for character-training.

4，体育运动对性格的培养也很有益处。