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Total synthesis of CET was accomplished by two routes through a conceptually novel strategy featuring a transannular reductive rearrangement as the key transformation for the construction of the core pentacyclic ring skeleton of CET.

我们采用了全新的合成策略，以氮原子参与的跨环还原重排为关键反应，通过两条路线分别成功地合成了三尖杉碱。

In molten ZnCl2 at high temperature, microporous organic framework based on phthalocyanine skeleton has been obtained from tetracyanopyrazine,and the dynamic trimerization reaction of 1,3,5-tricyano-benzene can lead to triazine-based material with high porosities.

在高温熔融的氯化锌存在下，四氰基吡嗪可以构建形成具有酞菁骨架的微孔材料， 1，3，5-三氰基苯可以发生三聚反应形成具有三嗪结构的微孔材料，均具有较好的多孔性能。

In this thesis, we find that dlg is indispensible in the establishment of anterior-posterior and dorsal-ventral polarity of drosophila oocyte. Removal of Dlg function from the posterior follicle cells using the FLP/FRT system leads to disruption of oocyte skeleton reconstruction that is elicited by the failure of those posterior cells to differentiate normally in mid-oogenesis. We demonstrate that abnormity of Notch, JAK-STAT and EGFR signal pathway in dlg mutants contributes to this aberrant differentiation. dlg null mutant also blocks the normal differentiation of two groups of anterior follicle cell-stretched cell and centripetal cell, but not border cell, with a lower penetrance. However unlike the result in posterior follicle cells, Notch and JAK-STAT signaling are both undisrupted in all mutant anterior follicle cells, implying other fate determinants may be involved.

我们的研究发现，后端滤泡细胞中的Dlg在果蝇卵子发生中期卵母细胞前后轴和背腹轴建立过程中也是必须的，PFC中dlg完全缺失型突变引起PFC的分化异常，导致卵子发生中期卵母细胞骨架重组异常，Stau、Grk等极性决定蛋白定位错误。dlg突变阻碍了Notch、JAK-STAT、EGFR等调节PFC分化的信号通路的激活。dlg突变的PFC也没有获得前端滤泡细胞命运。dlg突变不影响前端滤泡细胞群中边界细胞的分化，但是在一定程度上影响伸展细胞和向心细胞的分化，并且这种影响不依赖于前端滤泡细胞Notch或JAK-STAT信号激活的异常。

Mg2 Si phase nucleated on the surface of the eutectic Si flakes in the unfully modified alloys, growing as net or skeleton shape, however, very few and fine Mg2 Si particles were isolated at the boundaries of eutectic cells in the fully modified alloys.

结果表明：在未完全变质合金中Mg2Si相以网状或骨骼状形式存在，与共晶硅片之间存在附着生长关系；而在完全变质合金中，Mg2Si相以细小的颗粒相形式孤立地存在于共晶团边界上，数量极少。

The remains comprise an almost complete skeleton, lacking only most of the small bones of the hands and feet and the unfused ends of long bones......

一般现在时可以用以陈述现在时段内发生或存在的事件、动作或情况。

It's also, until the end, made up entirely of unpitched sounds, so that even the main themes are purely rhythms, which are so used to being the skeleton beneath the flesh, but so unused to carrying the entire weight of music.

同时，它整个由没有固定音高的声音组成，就连主要主题也纯粹用节奏来展示，人们习惯于将节奏作为支撑肉体的骨骼，但完全由节奏构成的音乐还是难以让人一下子接受。

Despite the presence of amino groups, the geometric parametersof the cyclic skeleton, revealed by x-ray crystallography, areonly slightly perturbed relative to those of the calculatedstructure of unsubstituted cyclopropenylidene.

添加的氨基酸没有破怀该分子的基本结构，这在稳定类似的卡宾络合物分子中曾是很难做到，研究人员说。

Material:Solid wood frame with wood skeleton batten inside , MDF board in both middle side , PVC venner .

材料：实木框架内木材骨架板，中密度纤维板局在中东方面，聚氯乙烯venner 。

To a certain extent, using Vetiveria zizaniodes to protect slope can replace the slope protection measure of planting grass in mortar-rubble skeleton.

在一定程度上可代替浆砌片石骨架植草护坡措施。

At last,a convergent and general protocol to marine natural product,as demonstrated by the enantioselective total synthesis of malyngamides O,P,Q,R, 5"-epi-Q and 5"-epi-R bearing terminal vinylic chloride structure,was developed in detail.E,(7S)-7-methoxytetradec-4-enoic acid was prepared using the above described Johnson-Clainsen rearrangement,the terminal vinyl chloride was constructed using Wittig reaction as key step,the pyrrolidone derivative was constructed using L-serine as natural chiral pool.Starting from the synthesis of malyngamides O and P to explore the general route,an aldol reaction of methyl acetate with the vinyl chloride part in the presence of LDA gave the skeleton of amine portion,followed by amidation with the fatty acid finished the synthesis of malyngamide P.

先以malyngamides O和P为试点探索通用合成路线，将乙酸甲酯和烯氯部分在LDA存在下进行aldol反应得到氨部分的骨架，再将手性不饱和脂肪酸和氨部分进行酰胺化反应完成了malyngamide P的合成，将P在碱性条件下进行烯醇甲基化反应完成了malyngamide O的全合成。

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。