合成体

The main reason of complex with greater nonlinear refractive index is that the complex has larger conjugated delocalized system and there are electrons shifting between ligand and metal atom.

选择具有π键的配体与金属离子合成为配合物，使其非线性效应明显增强，这对合成性能更好的非线性材料有一定的参考价值。

The most important, PsaA/B apoproteins can be synthesized obviously in the dark, which is different with the early report [1] that PsaA/B apoproteins can't be synthesized in the etiolated plants such as pea, barley. This different may come from that the volume and size of the chloroplast is not markedly reduced in dark-grown Y-1 cells and many enzymes involved in photosynthesis are localized on the chloroplast envelope.

同时发现，叶绿体基因编码的PSI核心多肽PsaA/B能够在暗条件下合成，而资料报道[1]高等植物如豌豆、大麦的黄化体中不能合成PsaA/B蛋白，这可能是由于在脱绿的Y-1细胞中叶绿体的量并没有发生明显的减少，且仍具有相对完整的大小和形状，而在叶绿体的被膜上具有许多参与光合作用的酶系统。

The left coumarin moiety was assembled by aldol condensation and then intramolecular esterification in one pot, which would be a popular method to build 3-substituted coumarins later.

最终，我们以12%的总产率和98.7%的ee值首次实现了-rutamarin的手性全合成；同时，我们还以17%的高产率实现了其消旋体的合成，比之以前文献报道的产率提高了2.5倍。

The results show that when alkaline earth metal oxides are used as the medium, the products are hexacoordinate silicon complexes, and that under the optimum synthetic conditions, the conversion yields of barium salt and calcium salt are greater than 90% and 60% respectively.

结果表明：以碱土金属氧化物为介质时，合成产物为六配位体有机硅化合物；在最佳合成条件下，钡盐的转化率达90%以上，钙盐的转化率在60%以上。

The recent progress in molecular design and synthesis of polyborosilazane precurosors for SiBCN ceramics is reviewed.Especially the borazine modified polyborosilazane,monofunctional borane modified polyborosilazane on side chai...

本文分4个方面，即基于硼吖嗪的聚硼硅氮烷、侧基含有环硼氮烷或单硼烷的聚硼硅氮烷、基于多官能硼烷构筑的聚硅氮烷和含硼聚硅基碳化二亚胺，从聚硼硅氮烷分子结构设计、改性、合成及在多维尺寸材料中初步应用的角度综述了该领域国内外研究的新进展，指出了聚硼硅氮烷陶瓷前驱体设计合成研究发展中值得关注的新方向。

However, the synthesis of circular nanostructures remains challenging due in large part to the difficulty in preparing functionalized cyclic polymers.4 Furthermore, reliance on macrocyclization routes to cyclic polymers restricts attachment of large side chains or dendrons to postpolymerization, and an efficient route to cyclic hybrid architectures of high purity is yet to be realized.

然而，由于合成功能化环状聚合物的难度很大，使得环状纳米结构的合成具有挑战性。4 另外，依赖于大环环合路线的环状聚合物受限于无法在后聚合过程中增加大型侧链或枝状体，同时目前也缺乏一种有效地获得高纯度环状混合结构的方法。

Two approaches for the asymmetric syntheses of naturally occuring eudesmane-type triol kudtriol and 5-epi-kudtriol as well as their C-11 epimers were achieved starting from-dihydrocarvone through six and seven steps, respectively.

以-二氢香芹酮为原料，用两条合成路线分别经六、七步反应完成了三羟基桉烷类天然产物Kudtriol、5-epi-Kudtriol及它们的C-11位差向异构体的不对称全合成。

In this paper,the SMO-type lithium ion sieve was the main research object,the manganates and lithium salts were taken as the main raw materials.Two LISs with high uptake capacity,better selectivity and stable structure were successfully prepared by hydrothermal method and coprecipitation method based on the discussion of correlation between Li+ uptake performance and the preparation conditions of LIS precursors.The effects of preparation conditions on Li+ uptake were also investigated.

本文以SMO型锂离子筛为研究对象，以锰盐和锂盐为主要原料，在采用固相法探讨离子筛前驱体制备条件与离子筛提锂性能关系的基础上，分别采用水热法、共沉淀法为主要合成方法，成功制备了具有高提锂容量、选择性好及结构稳定的两种锂离子筛材料，并研究了合成条件对材料制备及提锂性能的影响。

On the other hand, 3(2)-fluoro-4-methoxyl methyl benzyl alcohol and 3(2)-fluoro-4-methyl benzyl alcohol are mixture and components of pyrethrum esters. Both of them have "mixture fluorine effect " and higher activity, lower drug resistance. As we know, the mixture benzyl alcohol containing fluorine is more easy to be synthesized than the single, so the cost of preparation is lower. We hope to apply it to molecule design of the new agriculture chemical. On the base of molecule design and structure-activity relationship research of pyrethric acid II and mixture of alcohol containing fluorine, we intend to get new pyrethrum ester that have higher activity and lower resistance.

另一方面，混合含氟对甲氧甲基苄醇和混合含氟对甲苄醇都是具有&混合氟效应&的高活性、低抗性的拟除虫菊酯醇组分，由于混合含氟醇的合成要比单一异构体的合成容易，成本较低，本文希望将其应用到新农药的分子设计中，用第二菊酸和一些含氟醇进行分子设计及进一步的构效关系的研究，筛选出一些高活性低抗性的拟除虫菊酯换代新品种。

The effect of the substrate concentrations on 5-fluorouridine production was investigated in the presence of various concentrations of uridine and 5-fluorouracil under the optimal conditions mentioned below. The best conversion yield, 49% was obtained in optimal reaction conditions.

我们也探讨了在不同反应条件下5-氟尿苷的酶促合成，结果表明，产气肠杆菌EAM-Z〓游离细胞以UR和5-FU作为底物合成5-FUR的最佳条件为：最适pH为7.8，最适温度55℃，UR/5-FU为2.8，磷酸盐浓度为30mM，菌体用量为10％，反应时间为9h。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失