重作

For the first time, enantiomers of C2-symmetric 1,1 -spirobiindane-7,7'-diol were resolved with crude menthyl chloroformate by phase-transfer catalysis in the presence of tetrabutylammonium bromide. The reaction was carried out at 0℃-rt. The diastereomers of SPINOL bis-menthyl carbonate can be separated by simple crystallization using alcohol. The hydrolysis of the diastereomers was carried out via aqueous NaOH/EtOH solution.

首次通过相转移催化的方法对螺双二氢茚二酚进行了有效的拆分，用L--氯甲酸薄荷醇酯做拆分剂，以四丁基溴化铵为催化剂在0℃-室温下进行酯化反应生成非对映体衍生物，以乙醇作溶剂，通过重结晶的方法分离衍生物，在水-乙醇混合溶剂条件下，用强碱NaOH或KOH分别水解，制得相应的光学纯度大于99%ee的两个异构体SPINOL，其中总收率：--SPINOL，78.2%；--SPINOL，80.6%。

Albumin: Natural protein, soluble in water and most commonly found in the Albumins, the colloid used for certain dichromated sensitizes employed in photomechanical process.

蛋白：是一种天然蛋白质，可溶于水，在蛋白中最为常见。这种胶质在照相制版法里用以作重铬酸盐感光剂。

Hypodermic inject 1.2% D-galactose liquor (0.1mL/10g) by the nape of mice for 40 days. Observe: the ponderal index of brain, thoracic gland and spleen and the content variation of SOD and MDA in blood serum and brain tissue.

小鼠颈背部皮下注射1.2%D-半乳糖溶液0.1mL/10g鼠重，连续造模40天，并以空白组作对照，观察首乌软胶囊对亚急性衰老小鼠脑、胸腺、脾指数、自由基代谢指标血清和脑组织中超氧化物歧化酶和丙二醛含量的变化。

The reabsorption of scattering X-rays in amorphous selenium are considered in detail.

本文对光电吸收占优的条件下，X射线与非晶硒作用中产生的散射光子重吸收作了较为详细的研究。

The calculation results shows that ,(1) when the rotor rotates at the working speed, a local regurgitant whirlpool that is rightabout to the rotor"s rotating direction appears in the classifying region, which makes the separated granules come back to the outside of the classification district and influences the classification efficiency of the turbine classifier;(2) in the condition of a low rotating speed of turbo rotor, ultrafine particles can follow the gas phase by and large, but when the rotating speed increases, a phenomenon of velocity slippage between two phases appears evidently;(3) A operating parameter, air flow rate is so important that can directly influence the stability of flow field in classifying chamber, the bigger the air flowrate is , the steadier the flow field is;(4) Compared with straight blades, the new shape of blades with backward crooked elbow are helpful to improve the stability of flow field and form whole stream easily, also beneficial to advance the classification accuracy and classification efficiency;(5) The motion trace of particles are very complicated when the turbo rotor rotates at a high speed, the constant bounce of the particles appear between the blades and the coarse particles are even bounce back from the inlet, only the finer can pass through the classification area from the oulet;(6) Along with the increase of the rotor"s rotating speed, radiah axial and tangential velocity all begain to fluctuate repetitively like sine-wave, the smaller the particles are, the more violently they fluctuates.

数值模拟结果表明，(1)在涡轮达到工作转速时，在分级区域形成了一个与涡轮旋转方向相反的局部回流涡，它使得分离出来的细粒重又被带回分级轮外边缘，从而严重影响分级机的分级效率；(2)粉尘粒子在涡轮低速运动情况下，基本上能跟随气体运动，但随着转速加大，两相之间出现了明显的速度滑移现象；(3)分级机工作时的风量也是一个比较重要的操作参数，它可以直接影响到分级机内腔流场的稳定性，风量越大，流场越稳定；(4)同直叶片形状相比较，带后弯导板的叶片，有利于改善流场的稳定性，流场容易形成整体流，对提高分级效率和分级精度都非常有利；(5)粒子轨迹线在涡轮转速较高时十分复杂，有的出现了反复的弹跳现象，大颗粒不能通过分级区域而从进口返流了，只有细小的颗粒才从出口处流出；(6)涡轮转速加大时，粒子的径向、轴向和切向速率出现了明显的类似于正弦波的脉动现象，颗粒越小，脉动程度越为剧烈。

The results showed that under the given experimental conditions,the surface layer with richiron and poor copper was formed in the surface worn region of the semimetallic friction material,the depth of organic ingredient pyrolysis caused by friction heat in worn surfaces was atout 0.35mm; the semimetallic friction material containing 15%-20%of Cu had better wear-resistance,and can form a even and continuous transfer film of copper; crack peeling was the importantmechanism of the counterpart.

半金属摩擦材料具有摩擦系数稳定，耐磨性好，对环境污染小和对偶件表面损伤小等优点，但其在摩擦热和界面应力等因素作用下，表层会发生弹性变形，塑性变形，元素扩散，组分转移和摩擦化学反应等现象，因此，利用扫描电子显微镜X射线能量色散谱和差热－热重分析，对铜纤维增强的半金属摩擦材料与灰铸铁滑动摩擦表面层的特性作了分析研究，考察了表面层特性对摩擦损行为的影响。

We summerize the character of molecular structure, expression pattern of H1foo, and its function in fertilization, reprogramming the somatic cell after SCNT in this article.

本文就H1foo的分子结构特征、表达特点及其在受精过程、体细胞核的重编程过程中的作用作一综述。

I once saw the soul and the body not the infant of cooperation, the symptom will not cry and will not smile, not touch he keeps original shape forever; The modern medical science explanation say is be born cerebral is squeeze but with the result that disease, probe it because of really not so suffer from this paroxysm infant parents or Ye milk necessarily is the sin deeply heavy To, there is heart doing some inquisition summaries, here say of the sin was deeply heavy to be not necessarily sentenced by the customs law, is a serious unscrupulous Towhee everybody arrived at the human life all according to the way of nature.

我見過靈魂與身體不協作的嬰兒，症狀是不會哭、不會笑，不觸動他就永遠保持原狀；現代醫學解釋說是出生時腦血管受擠壓而致病，深究其因並非如此，患此疾病的嬰兒父母或爺奶必是罪孽深重之徒，有心者可以做些調查總結，這裡說的罪孽深重不一定是被世俗法律定過罪，是嚴重的缺德之徒。每個人來到人間時都是依照自然之道。

When applied random fields are trimodal, the critical properties including the possibility of the existence of the tricritical points and rcentrance phenomena are numerically analyzed in detail.

无规场取双峰和三峰分布时，通过数值计算对系统的临界特性包括三临界点和重入现象存在的可能性作了详细的研讨。

If you do, untap that creature.

若你如此作，则重置该目标生物。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。