异构体

FT-Raman and surface enhanced Raman spectra of leucine and isoleucine, the only isomer in proteinic amino acids, on the silver colloidal substrate are recorded.

报道了在蛋白质氨基酸中唯一一对异构体氨基酸——亮氨酸和异亮氨酸的FT-拉曼光谱和在银胶基底上的表面增强拉曼光谱。

We have demonstrated that the expression of protein kinase Cisoform are associated with the development of deciduomata in the pseudopregnant and pregnant rats.

我们过去的研究中已经发现，在蜕膜的形成过程中，不论是在真怀孕或假怀孕大鼠蛋白激酵素C异构体都参与其中蜕膜的形成，因此我们猜测PKC可能参与调节蜕膜细胞的增殖。

Green coffee beans contain up to 10% of chlorogenic acids, i.e.,various isomers of hydroxy-cinnamoyl esters of quinic acid.

咖啡生豆含有最高可达10%的绿原酸，即，奎宁酸的不同种的羟基酯异构体。

Use of stereoselective or stereospecific synthetic methods or separation of racemic mixtures can be used to obtain individual optical isomers.

可以使用立体选择或立体专一的合成方法，或者外消旋混合物的分离，来获得单独的光学异构体。

Ketorolac is administered as a racemic mixture with the Sisomer responsible for the analgesic effect.

给予的酮咯酸是一个外消旋混合物， S异构体产生镇痛效应。

The lowest surface tension of N_xB solution was better at 25℃, and lowest surface tension would down with carbon . cmc( critical micelle concentration) and γ_ in N_(12)B are 4.1 × 10~(-4)mol/L, 24.5 mN.m~(-1),what was smaller than LAS . The cmc of N_(12)B- NaCl are down with NaCl up.The surface tension and cmc of N_(12)B and N_(16)B are higher than that of N_(12)OB and N_(16)OB because of hydrophilic group ,but that of N_(12)B is lower than that of N_(16)B because of hydrophobic group .5. The borate structure and semipolar bond were studied in different pH by infrared spectrum .It indicated that N_xB and N_xOB have not semipolar bond at pH

4、25℃，N_xB系列都有较低的表面张力，并随碳原子数的增加而最低表面张力下降。N_(12)B比同碳原子数的十二烷基苯磺酸钠的最低表面张力34.5mN／m低，且临界胶束浓度为4.1×10~(-5)mol／L，也比LAS低，且随着NaCl浓度的增加而略有下降，比较N_(12)B和N_(16)B，由于C_(16)疏水基的异构体使N_(12)B的临界胶束浓度和临界胶束浓度时的表面张力γ_(cmc都低，由于增加了亲水基团使得N_(12)OB和N_(16)OB的表面张力和临界胶束浓度都要高于N_(12)B和N_(16)B。

The polyaniline hybrid materials doped with cobalt substituted silicotungstate isomers α,β-Kβ(subscript 6-n)H[SiW11Co(H2O)O39]xH2O β(subscript i=β1,β2,β3 have been prepared.

以Keggin结构钴取代杂多硅钨酸盐异构体α，β-K(下标 6-n)H[SiW11Co(H2O)O39]xH2Oβ(下标 i=β1，β2，β3为掺杂剂，采用固相合成法制备了4种聚苯胺掺杂材料。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

结果表明，在醋酐存在条件下，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，反应温度控制在50℃，反应60 min， 1.0g经300℃焙烧1.5h后的硅钨酸催化剂，对甲苯表现出强的区城选择性，甲苯硝化产物o/p值（甲苯硝化产物邻位和对位异构体的质量比）达0.89，较硝硫混酸的1.67显著降低，产物收率达到91.6%。

PK values of 3-ethoxy-N-desmethyldiazepam (3-EtO-NDZ) in ethanol and acetonitrile containing various concentrations of sulfuric acid, determined by spectrophotometry and spectropolarimetry, were found to be 3.4 and 0.63 respectively. Temperature dependent racemization of enantiomeric 3-EtO-NDZ in ethanol containing various acid concentrations was studied by monitoring changes of ellipticity at 365 nm as a function of time on a spectropolarimeter.

3-乙氧基－N去甲基安定（3-EtO-NDZ；diazepam=安定）在含不同硫酸浓度的乙醇和乙腈中的pK值用光谱法和旋光光谱法作了测定，其结果分别为3.4和0.63.3-EtO-NDZ之对映异构体在含各种不同酸浓度的乙醇中与温度相关的消旋过程，用旋光光谱仪选择其圆二色谱在365nm波长处强度的改变为时间函数的方法作了测定。

The bioassays showed that the inhabitation rate of the mixture of two isomers, Z isomer and E isomer were reached 95 %, 100% and 97% against Sphaerotheca fuliginea at 50 mg/L.

结果表明，当处理剂量为50mg／L时，氯苯肟唑、Z-氯苯肟唑和E-氯苯肟唑的防效分别为95％、100％和97％，三者活性基本相当，故在实际中无须将两个异构体分离，混合体可直接应用。

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。