外-斐反应

The kinetic resolution of raceme is one of the important ways in the synthesis of chiral com-pounds.

外消旋体的动力学拆分反应是制备手性化合物的重要方法之一。

A key feature of this methodology is the use of metal catalysts for the in situ racemization of enzymatically unreactive enantiomers in the enzymatic resolution of racemic substrates.

酶和金属配合物的结合扩展了这个方法的使用范围，该方法的主要特征是用酶催化拆分和金属催化原位外消旋化未反应的底物，克服了经典动力学拆分最高产率只有50%的缺陷。

Methods All the coding exons of TSC1 and TSC2 genes of these two patients, unaffected member in the two families, and 100 unrelated population-matched controls were amplified by polyme- rase chain reaction.

采用聚合酶链反应扩增结节性硬化症患者、患者家庭中的正常人及100例健康对照的TSC1 和TSC2基因的全部外显子，并进行DNA序列分析。

The sry-gene chimerism of bone marrows, spleen and thymus of the receiptor, T-lymphocyte subpopulation of peripheral blood cells, ConA and LPS induced T and B cells proliferation activity tests, Mixed lymphocyte reaction between the donor and the receiptor and the third part, the incidence rate of GVHD and survival analysis were observed in mice after 8Gy TBI with MSCs and haplo-BMT treatment together.

通过观察半相合BMT联合MSCs治疗致死剂量照射小鼠后不同时间骨髓、胸腺和脾脏中供者细胞植入，外周血中的淋巴细胞亚群，ConA和LPS刺激的T、B淋巴细胞增殖，供受者及第三者混合淋巴细胞反应，急、慢性GVHD的发生率和生存分析，提示MSCs促进骨髓干细胞植入，加快T淋巴细胞增殖，促进体液免疫恢复，通过供受者免疫耐受，减少GVHD发生率，提高半相合BMT动物生存率。

In the present study changes in neuronal activity during and after adaptation to prolonged optic flow stimulation (translation, radiation and rotation) were investigated by extracellular single-unit recording in area PMLS of the cat.

本文采用胞外记录法研究了猫PMLS区神经元在长时程光流刺激时及刺激后细胞反应的变化。

This inversion of the value-positing eye - this need to direct one's view outwrd instead of back to oneself - is of tthe essence of ressentiment: in order to exist, slave morality always first needs a hostile external world; it needs, physiologically speaking, external simuli in order to act at all - its action is fundamentally reaction.

这种颠倒的价值目标的设定——其方向必然是向外，而不是反过来指向了自己——正好属于这种怨恨。奴隶道德的形成首先总是需要一个对立的外部环境，从生理学上讲，它需要外部的刺激才能粉墨登场，它的行为从根本上说是一种反应。

Orthogonal experiment under special condition showed that modifier M has marked effect on properties of no bake sand. Other factors such as modifier B,phosphate concentration and aluminum hydroxide have some impact on properties of binder. It can be found by experiments that strengths of no bake sand are raised notably by binder that modified by modifier B. Modifier B can reduce the strength of no bake sand at high room temperature apart from condition of low room temperature that it can accelerate the reaction and strengthen the sand. Modest content of modifier M in binder has some improvement to anti-wettability of sand. But modifier B has not such notable effect. Electronic microscope shows that near cracks in no bake product there are fibrous shape substances formed when the samples are moistured in high humidity air for sometime.

通过改性剂B对粘结剂自硬砂的性能影响试验发现，改性剂B能显著提高粘结剂自硬砂的强度，在0℃左右很低的环境温度下改性剂M有利于提高自硬砂的反应速度和砂型强度外，但在较高环境温度下，改性剂M均降低粘结剂自硬砂的强度，但是适量的改性剂M有利于改善自硬砂的抗吸湿性，而改性剂B对于改善自硬砂的抗吸湿性的作用不如改性剂M明显，电镜观察发现抗吸湿性较好的自硬砂在高湿度下存放一定时间后，在粘结膜裂纹处会形成一种绒毛状物质，该物质对裂纹具有愈合作用，这种绒毛状物质中具有改性剂M中的某种成分，且含量很高，由此说明改性剂M对提高抗吸湿性有利。

The IR spectra and X-ray difftaction analysis indicated that in addition to an enlargement of surface area the fine grinding action had made also changes of fine structure and reactivity of solid surface, hence the leaching process of scheelite can be carried out under mild leaching conditions.

红外光谱和X射线分析结果表明，细磨除了使白钨矿比表面积显著增大外，还在固体的表面和内部产生缺陷结构，增加了矿物表面的反应活性，改善了白钨矿的分解，使得白钨矿的浸出能在较低的温度顺利进行。

psychology nurses interpose, liquid nitrogen is refrigerant treat wet wart of gestation vulva acuteness to have cure rate jointly with MEBO tall, recrudesce leads low, verrucous body to keep clear of the fast, heal that achieve a face does not leave reaction of fine of weak point of scleroma and scar, period of treatment, all without exception quickly to wait for an advantage, can use at pregnant woman.

结论心理护理干预、液氮冷冻和MEBO联合治疗妊娠期外阴尖锐湿疣具有治愈率高、复发率低、疣体清除快、创面愈合快不留硬结和瘢痕、疗程短、无不良反应等优点，可用于孕妇。

With western blot analysis and DNA polymerase chain reaction-single strand conformation polymorphism assay,protein product of Rb gene and mutation in exon 5～8 of P_(53) gene were examined in 17 cases of human testicular seminoma.

采用Western印迹和DNA聚合酶链反应－单股构造多态性分析法对17例人睾丸精原细胞瘤组织标本的抗癌基因Rb表达的蛋白产物和P_（53）基因外显子5～8的突变进行检测，发现有3例标本的Rb基因表达的蛋白产物缺失，有4例标本的P_（53）基因有点突变，对照的正常人睾丸组织和视网膜组织均呈Rb基因蛋白产物表达阳性，对照的正常人睾丸组织中未发现P_（53）基因突变。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。