本底

Feeding can, output can and etching gas transmission system are connected on the reaction chamber, plate type positive and negative electrodes installed in parallel in the reaction chamber, with the negative pole connected with the water cooling device that connected with seal wave tube and the bottom of the reaction chamber actively, bottom of the water cooling device connecting with the vibrating source through vibrating shift lever, with the seal wave tube, vibrating shift lever and vibrating source on the bottom bracket that fastened to the bottom and installed on the oblique angle adjusting bracket.

本发明反应室上连接投料罐、出料罐和刻蚀气体输送系统，反应室内平行装有板式阳极和阴极，阴极与水冷装置连接，水冷装置通过密封波纹管与反应室底部活动连接，水冷装置底端通过振动转换杆连接振动源；密封波纹管、振动转换杆和振动源位于底架上，底架与反应室底部固定连接并安装于倾角调整支架上。

When bottom object concentration is 6-12g/L, different mole ratio cyclodextrin is added according to different bottom object, the percent conversion of bottom object aromatic ketone is 50-99and antipode excess value of outcome optically active alcohol is 75-99D:工作文件发明补译2433biba_补13_sunquansheng(100件)2433biba_补13_sunquansheng(100件).txto the product incorporating the invention has high practical application worthiness.

利用本发明在底物浓度为6～12g/L时，环糊精用量根据底物的不同选择不同的摩尔比加入，此时底物芳香酮的转化率为50％～99％，产物光学活性醇的对映体过量值为75％～99％，具有较高的实际应用价值。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

The floor cleaning slipper capable of being filled with liquid agent includes one vamp and one sole, and the sole includes one bottom cushion, one sole wall to form a holding space, one cleaning body around the holding space and at least ojne filling hole structure, comprising one hollow nail and one buckling ring in the sole wall.

本发明是有关一种可填充液剂的擦拭鞋，其具有一鞋底与一鞋面，该鞋底大致包括一中底垫、一鞋墙、一擦拭体与至少一灌浆孔结构。鞋墙包围的结合于中底垫的周缘部位并形成有一中底容置空间；擦拭体套设填充于中底容置空间；灌浆孔结构是由一中空钉与一扣环所构成，其结合于鞋墙上。

Potable γ spectrometry ; Low background ; temperature compensation ; self-stability.

便携式γ能谱仪；低本底；温度补偿；特征峰稳谱

Expo ′99 Kunming ; mega-event ; effects assessment ; background trend line model

1999昆明世博会；重大事件活动；效应评估；本底趋势线模型

Liquid scintillation counter ; Detection efficiency ; Background ; Anticoidence shield ; Crosstalk count ; Nal crystal

液体闪烁计数器；探测效率；本底；反符合屏蔽；串光计数； NaI晶体

In order to separate trace plutonium from uranium matrix for subsequent mass spectroscope determination of the former,an extraction chromatographic method composed of a TBP extraction resin column and a cationic exchange resin column was developed.

为了从铀基体中分离痕量钚，采用由TBP色层柱和7402季铵盐色层柱组成的萃取色层法及低本底α谱仪对模拟铀样品中铀钚分离方法进行了研究，并确定了分离流程的条件；对影响流程分离效果的主要因素，如料液和洗涤液酸度、流速、解吸液浓度等进行了研究，确定了最佳分离流程。

Analysis of the activated background spectrum shows that natural copper is an ideal shielding material in fast neutron nuclear reactions.

通过分析天然铜的活化本底谱，可以看出它是快中子核反应中的最理想的屏蔽材料之一。

To explore the mechanisms responsible for formation and variation of O3 at the surface, the variation characteristics of the surface O3 over Waliguan had been analyzed based on near eight years of continuous observations of surface O3 at Waliguan atmospheric baseline observatory from 1994 to 2002, combined with the Waliguan CO data and O3 and CO data of other three near high elevation globe background stations, Mauna Loa, Jungfraujoch and Izaa in the same period.

为探讨地面O3生成和变化机制，利用青海省瓦里关大气本底基准观象台1994~2002年的地面O3连续观测资料，结合同期瓦里关CO数据及3个相近高海拔全球背景站点Mauna Loa， Jungfraujoch， Izaa的O3和CO资料，对瓦里关地面O3变化特征进行分析。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。