环

Flow disciplinarian of different PH indicator polymer solution and newtonianliquid in annulus line had been studied, and found speed distributing, vortex,streamline of annulus line, analytic flow field distributing in annulus and eccentricsituation and compared the results with prevenient schloar, some results different fromprevenient results are get, shch as the relation of average velocity and maxiumvelocity is not less with the viscosity exponent under the annular line, the fluid speedaffect the relation.

应用 PIV 分别研究了不同浓度的聚合物溶液以及牛顿流体在垂直环空管道中的流动规律，得到了环空管道中流体的速度分布情况、涡量情况、流线情况，分析了同心和偏心情况下环空管道内的流场分布规律，并与前人的计算结果进行了比较，得出了一些与以前不同的结论：同心情况下平均流速与最大流速的关系，并不是完全与粘性指数 n 值有关系，还与管道内流动的流动速度有关系，当速度较小时，两者的差别就小，速度大时，不符合这种规律。

Some properties of local rings with weak global dimension one are discussed and a class of rings are shown to be such local rings.

讨论了具有弱总体维数为1的局部环的一些性质，并证明了一类环是弱总体维数为1的局部环。

In this paper,through the analysis of the engineering quality accident of the top circle beam in a certain big wineshop,a mechanical model of the reinforced concrete circle beam is proposed.

通过对某大酒店顶层环梁质量事故的分析，提出了钢筋混凝土环梁计算的力学模型，经过计算和分析，找出了环梁支座处出现裂缝的原因，并给出正确的计算结果，使事故得以及时处理。

The result showes that The natural population of the wolf spider has abundant genetic diversity and there are difference in the genetic diversity of the population from different geographical regions.

结果表明：拟环纹豹蛛的自然种群具丰富的遗传多样性；不同生境的拟环纹豹蛛种群遗传多样性存在差异；海拔和积温是影响拟环纹豹蛛种群遗传分化的主要因子。

The test results indicate that the zincate catalyst systems can accelerate these reactions high-effectively, so its selectivity is up to 100% and TOF is 5472h -1, and the activity and the selectivity of the catalyst are kept in six times, and the catalyst system can be availab.

研究了离子液体助催化的各种无机盐催化剂体系用于二氧化碳和环氧化合物通过环加成反应制备环状碳酸酯，结果表明锌盐催化剂体系能够非常高效地催化该反应，最高得到了 5 472h- 1的催化转化频率和 10 0 %的选择性，催化剂使用六次以后没有发现催化活性和选择性的下降，并且该催化剂体系能够适用于各种结构的环氧化合物。

A novel β-cyclodextrin graft copolymer was synthesized by immobilizing β-CD onto the linear chain of PVA through acetalization reaction.

利用缩醛化反应将醛基化β环糊精固载到聚乙烯醇大分子链上，合成出了聚乙烯醇固载β环糊精的线性环糊精高分子，其最佳反应条件是反应时间 2h ，温度 70℃，β CD 6 CHO与PVA的质量比小于等于 4∶1。

In the cyclization process,α-acylamino radicals preferred to attack acylsilanes from the face opposite to the β-substituent, and the stereoselectivity of the bridgehead is excellent. The orientation of the hydroxy group formed in the cyclization process was mainly exo.

生物碱架桥上立体化学的建立，可透过环上取代基立体障碍的影响，使得环化过程只会从立障较小的一面进行，因此可得到单一立体化学的结果，而环化所形成的羟基则是以exo的产物为主。

Two kinds of polymer-β-cyclodextrin derivatives(PCM-β-CD and PAE-β-CD) with different substition degrees and crosslinked densitiese were synthesized by using epoxychloropropane and Carboxymethyl-β-Cyclodextrin and N-(2- aminoethyl) amidine-β-Cyclodextrin of retaining the amino with different substitution degrees crosslinking polymerization.

论文对含有羧基和氨基的两类β-环糊精聚合物即聚合羧甲基-β-环糊精及聚合N-(2-氨乙基)胺基β-环糊精的合成及其吸附有机污染物碱性品红和苯酚的性能进行了以下研究。1。

In order to develop an useful synthestic process, we have synthesized amides with various substitutents. The isoquinoline skeleton was constructed through Bischler-Napieralski reaction, followed by asymmetric reduction of the imine intermediates with a Ru complex to form the only chiral center. Finally, we connected the two phenyl groups by Heck reaction and effectively obtained optically active aporphine alkaloids.

为了发展一套实用的合成方法，我们首先制备於苯环上具有不同种取代基的苯乙醯胺，接著透过Bischler-Napieralski反应进行分子内合环，并利用钌金属对亚胺中间体进行不对称的还原反应，建立出产物中唯一的光学活性中心，最后再利用Heck反应连结两个苯环，就可以顺利得到具有光学选择性的阿朴吩类天然物。

Phylogenetic analysis based on 5.8S/ITS sequence indicated Armillaria luteo-virens has a distant phylogenetic relationship with other genera of Tricholomataceae. Phylogenetic analysis based on two IGS-1 sequences indicated there were significant differences between the IGS-1 sequence of Armillaria luteo-virens and that of other species of Armillaria.

基于ITS的系统发育分析表明黄绿蜜环菌与口蘑科内其它属间物种的系统发育关系较远；基于IGS-1的系统发育分析表明黄绿蜜环菌与蜜环菌属内的其它种序列差异较大，系统发育关系较远，而与Lepiota属内的部分种具有较近的系统发育关系。

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。