四体

The results showed that the four treatments of cytochrome c supplemented with ATP all suppressed the pollen germination and pollen tube growth, and induced nuclear DNA degradation, different treatments with different ratios of double nuclei, single nucleus, and no nuclei. Treatment with heavy concentration of ATP also restrained pollen germination and pollen tube growth, but can not induced nuclear DNA degration.

结果表明，细胞色素c和ATP混合处理的四个组合都能抑制离体花粉萌发和花粉管生长，并且引起了花粉管核DNA的降解，不同处理中双核、单核及无核花粉管所占比率存在明显差异；高浓度ATP虽能抑制花粉萌发和花粉管生长，但不能引起花粉管核DNA的降解。

The main results can beexpressed as follows:(1)Based on πtheory, some affected factors about wave forces are given, and therelation between affected factors and wave forces is analysised by experimentalresults.(2) The distribution of wave press at representative time and reflection nature aregiven and their variety charactes are discussed by experimental results.(3)By comparing the wave forces of quarter-circular breakwater and semi-circularbreakwater under the same wave conditions,some approximately wave forcesexpressions of quarter-circular breakwater are given.(4)Based on VOF method to trace water free surface,solve numerical value ofRANS equation,and get the distributions of flow field and wave press ofquarter-circular breakwater at the same time during one period,the mechanism ofwave force is also discussed elementarily.(5) Based on the result that RANS equation of numerical simulation agree wellwith experimental results,a new approach to study hydraulic natures of quarter-circular breakwater is provided.

其主要结论如下：一、通过π定理，确定影响波浪力的无因次参变量，根据试验结果对其影响因素进行分析；二、基于模型试验，给出典型时刻圆弧面防波堤的同步波压分布和反射特性，讨论它们的变化特点；三、通过相同条件下圆弧面防波堤与半圆型防波堤两种堤型试验波浪力的比较，给出了圆弧面防波堤波浪力的近似方法；四、利用VOF法追踪自由水面，数值求解RANS方程，得到圆弧堤堤体周围的流场和压力场，初步分析了速度涡流与压力场的相互影响；五、对比数值分析与试验结果，探讨数值方法研究圆弧面防波堤水力特性的可行性，提供新的研究途径

Werner was correct, however, in his conclusions concerning the octahedral geometry of coordination number 6 for cobalt and platinum.

然而，对于钴和四价的铂等配位数为6的八面体几何构形的结论，沃纳是对的。

Similarly, we have investigated the stable structure of Ge20 and found that its ground state structure is different from that of Si20. But the most stable structure is also a stacked structure from the ground state structure of Ge10 (tetracapped octahedron with Td symmetry), which is in agreement with the fragment experiment.

类似地，我们首次对Ge20团簇的稳定结构进行了同样的研究，发现它的基态结构与Si20团簇的不同，但它同样以Ge10团簇的基态结构（四帽八面体，Td对称性）为单元的一个堆积结构，这与碎片实验结果吻合。

One octoploid 990256, four disomic addition lines E99006, E99009, E99010, E99015-8 and one substitution line E99018 resistant to powdery mildew were selected by identification of artificial induced powdery mildew disease.

经白粉病人工接种鉴定，从中选出了一个抗白粉病的八倍体小偃麦990256，四个抗白粉病异附加系E99006、E99009、E99010、E99015-8、一个抗白粉病异代换系E99018。

Hydrostatic transmission is widely used in construction machine. The research of one of its hard cores, low speed high torque radial piston motor, is very important. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. The research is divided into four parts:1 Taken all forces the piston endured into consideration when radial piston motor working, the force between roller and orbit is deduced.

静压传动技术在各类工程机械中得到广泛的应用，对作为其核心部件的径向柱塞式低速大扭矩液压马达的研究显得十分重要，为了能直接对这种马达进行寿命估计，并能在相同工况下求得寿命最长的轨道曲线，本文从设计等接触应力内曲线的角度对这类马达作探讨性的研究，主要从以下四个方面进行：(1)综合考虑径向柱塞式液压马达工作时的各种主要受力状况，对柱塞组件进行受力分析，并通过仿真分析影响轨道和滚动体间正压力的各个因素，得到正压力的简化表达式。

Rhythmical prose marked by parallelism and ornateness were no longer popular in later ages.

"四六体"的文章在后世已经不再流行了。

And presents some commonly process and attentions in applying the FEM software ANSYS to PCM analysis.2 Analyzed the PCM performances under the affection of piezoelectric and polymer"s material characteristic by FEM, and got the rule.3 Analyzed the PCM performances which affected by stickup layer"s materials characteristic and its thickness under the application of FEM.4 Based on the construction principles of 1-3 type orthotropic piezoelectric composite materials, the finite element model is designed and its orthotropy is analyzed, at the same time, the length/broad ratio to PCM orthotropy is also analyzed.

二、应用有限元法分析了压电相材料和聚合物基体相材料特性对于压电复合材料综合性能的影响规律。三、应用有限元法分析了粘贴层的材料性质和厚度尺寸对压电复合材料在实际应用中性能的影响规律。四、根据提出的正交异性压电复合材料的构造原理，设计出1-3型正交异性压电复合材料的有限元模型并分析其正交异性，同时分析了压电相材料长宽比对其正交异性的影响。

To solve this problem, several methods have been introduced for the recovery and reuse of the ligands and osmium tetroxide.

为了解决这一问题，科学家探索了多种回收手性配体和四氧化锇的方法。

Effect of solute adsorption on vapor pressure osmometry measurment was studied by four low molecular weight organic compounds and five narrow MWD oliomeric polystyrene samples with known average molecular weight in Knauer VPO apparatus.

在气相渗透仪上，用四个低分子量有机化合物和五个已知平均分子量的窄分布聚苯乙烯低聚体，对VPO方法中的溶质吸附效应作了研究，提出了一种对吸附效应作改正的方法。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。