选择性

Objects:Patients admitted in the department of circulation of the first hospital of China Medical University between 1998 and 2004 and examined by coronary angiographies were studied. Selective coronary angiography was performed with either Judkins or Sones technique.

一、研究对象选取从1998年～2004年于中国医科大学附属第一医院循环内科住院，并接受选择性冠脉造影的患者，采用Judkins法或Sones法对患者行右冠和左冠选择性冠脉造影。

Fenestration laminectomy of L3、5 and part of S1 was performed and the lower threshold dorsal rootlets of L2、3、5、S1 were selectively sectioned judging by electrical stimulation on the patients with lower extremities involved. Open-door laminaplasty of C5-7 and selective posterior rhizotomy of C5-8 were performed on 5 patients with upper limbs involved simultaneously in half a year. For 2 patients with lumbar stenosis or protrusion of intervertebral disc or unstable lumber, internal fixation of pedicle screw was performed while SPR.

针对下肢痉挛患者采用L3、L5及部分S1椎板开窗，通过电刺激测阈值法选择性切断部分L2、3、5，S1脊神经后根；5例合并上肢痉挛瘫患者半年后采用颈后C5~C7单开门法，选择性切断部分C5~C8脊神经后根。2例合并腰椎不稳定、椎管狭窄及腰椎间盘突出，则术中在行SPR的同时行椎管减压，突出椎间盘髓核摘除，并行经椎弓根内固定。

In the mixed solvent of dimethyl phthalate / TBP or phenyl ether / TBP, the selectivity for styrene oxide is good but the conversion of styrene is low due to the coordination to the catalyst of the solvent.

邻苯二甲酸二甲酯或二苯醚等与磷酸三丁酯的混合溶剂中环氧化的选择性较高，但由于溶剂对催化剂的配位作用抑制了催化剂的活性，苯乙烯转化率很低；当部分的邻苯二甲酸二甲酯或二苯醚被甲苯取代后，苯乙烯的转化率提高，生成环氧苯乙烷的选择性不变。

In this thesis, this system is used for epoxidation of propylene and styrenewith good results. The solvent effect is investigated for epoxidation of styrene. In the mixedsolvent of dimethyl phthalate / TBP or phenyl ether / TBP, the selectivity for styreneoxide is good but the conversion of styrene is low due to the coordination to thecatalyst of the solvent. When part of dimethyl phthalate or phenyl ether is replacedby toluene, the conversion increases and the selectivity keeps constant.

邻苯二甲酸二甲酯或二苯醚等与磷酸三丁酯的混合溶剂中环氧化的选择性较高，但由于溶剂对催化剂的配位作用抑制了催化剂的活性，苯乙烯转化率很低；当部分的邻苯二甲酸二甲酯或二苯醚被甲苯取代后，苯乙烯的转化率提高，生成环氧苯乙烷的选择性不变。

Underoptimal conditions, in toluene / dimethyl phthalate / TBP, after EAHQ was oxidizedwith 〓, then the catalyst and styrene were added, the conversion of styrene basedon EAHQ is 68%, the selectivity for styrene oxide based on styrene is 92% and theTON of the catalyst is 500; in toluene / phenyl ether / TBP, epoxidation of styrenewas performed with 〓 generated in situ, the conversion is 46%, the selectivity is94% and the product can be separated by distillation under reduced pressure.

优化条件下，甲苯／邻苯二甲酸二甲酯／TBP(2／2／1，体积比)中，EAHQ先用〓氧化完全后，再加入催化剂A和苯乙烯进行环氧化反应苯乙烯相对于EAHQ的转化率为68％，生成环氧苯乙烷的选择性为92％，催化剂A的TON达到500；甲苯／二苯醚／TBP(1／3／1，体积比)中，原位生成〓条件下苯乙烯相对于EAHQ的转化率为46％，生成环氧苯乙烷的选择性为94％，产物可通过减压蒸馏分离。

Many studies dealing with chiral drugs which are administered as their racemates rely on non-stereoselective analytical techniques. It was shown that the use of such an analytical method can lead to the collection of data which may be both quantitatively and qualitatively inaccurate with respect to the individual enantiomers.

一般非对掌选择性的药物分析条件，得到的药物血中浓度是个别镜像异构物的总和，而非个别镜像异构物的血中浓度，因此并无法对於对掌性药品的立体选择性动态学做定性或定量的探讨。

Objective To evaluate clinical applications of Roberts uterine catheterand to discuss techniques of selective catheterization of uterine arteries.Methods 469patients underwent selective uterine artery cathe terization and further intervenioen therapy,time needed for selective catheterization and catheter-related comˉplications were recorded.

目的 评价罗伯特子宫动脉导管的临床应用价值并探讨子宫动脉选择性插管技术方法使用罗伯特子宫动脉导管对469例患者进行选择性子宫动脉造影和介入治疗，统计插管所需时间及与导管操作相关的并发症。

In the selective oxidations, Manganese porphyrin mimic enzyme systems supported on different inorganic supports are designed and developed, which are applied in studies of green processes, such as, the selective olefin epoxidation with oxygen in either ionic liquid or water, the oxidation of alcohols.

在选择性氧化反应中，设计制备了不同无机载体的锰卟啉模拟酶体系，分别在离子液选择性和水相中开展了以氧气为氧源的烯烃环氧化、醇的氧化等绿色反应过程的研究。

TiO〓/K-M supported Ag/SiO〓 composite ceramic membrane tubes have been prepared and used as a membrane reactor for selective separation of C〓H〓 during the catalytic reaction process of CO〓 partially oxidating C〓H〓. By removing C〓H〓 produced in the catalytic reaction, thermodynamic balance of the reaction is upset and some side reactions from C〓H〓 are avoided, thus the conversion rate of C〓H〓 and the selectivity to C〓H〓 are effectively increased.

本研究设计、制备了硅藻土—莫来石陶瓷管负载的Ag/SiO〓复合膜，并将其应用于二氧化碳部分氧化乙烷催化反应过程中产物乙烯的选择性分离，有效地提高了催化反应的反应物乙烷转化率和产物乙烯选择性。

Those viruses, which can selectively replicate in and kill tumor cells, were called conditional replicative viruses or oncolytic viruses.

这种能选择性地在肿瘤细胞中复制，并进一步杀灭肿块，被称为条件性复制病毒或选择性复制病毒(conditional replicative viruses)，或溶瘤病毒。

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％。