查询词典 ethylenic

The invention discloses a process for preparing N-Boc derivative or N-Cbz derivative of chiral alpha, alpha'-double substituent pyrrolidine which contains ethylenic link and acetylenic link substituent.

本发明公开了一种制备含烯键和炔键取代基的手性α，α'-二取代吡咯烷的N-Boc衍生物或N-Cbz衍生物的方法。

The first part reports some new reactions of BNAH, especially the reductive cyclizations of some activated ethylenic compounds to five-membered carbocycles and a sevenmembered enolic ether ring, both of which may be useful in related areas.

详细论文的研究对象是重要的辅酶NADH的化学模型1-苄基-1，4-二氢烟酰胺。论文包括一个对近期该领域进展的综述和三部分工作。

More and more attention has been paid to the preparation of SAP by grafting the ethylenic unsaturated monomers onto polysaccharides in order to decrease the environment pollutions.

为减少随之而来的环境污染，多糖与乙烯基类不饱和单体接枝共聚制备SAP引起了学术界的极大关注。

My research project is concerned with the mechanism of reactions of coenzyme NADH models with activated ethylenic compounds. Pross-Shaik treatment is employed to analyse the results.

本论文研究了辅酶NADH模型化合物和活化烯烃氧化还原反应的机理，并运用Pross—Shaik观点分析了这些反应的机理。

This paper studied on the conditions of the SAP preparation by grafting the ethylenic unsaturated monomers onto the polysaccharides of konjac flour. In addition , the structure and the biodegradable property of the SAP were tested .

本文研究了魔芋多糖和乙烯基类不饱和单体接枝共聚制备SAP的条件，并对该接枝共聚物的结构和生物降解性能进行了研究和分析。

We understand that (1) releasing gases are mainly made up of CO 2 and alkane gases, and have a little ethylenic gases. There is a gas releasing peak at the temperature of 300～400℃ and the content of C 4～C 6 increases with temperature ri...

二氧化碳随温度的升高释放量增大，主要为碳酸盐分解贡献；(2 )含碳气体碳同位素随温度的升高增重，在气体释放峰温度段 350℃左右时发生明显&转折&，碳同位素组成明显变重，结果造成在不同的热演化阶段碳同位素值有较大范围的变化。

Results The five purified ginkgolic acid monomers were GA13:0.,GA15:0.,GA15:1 ,GA17:1 and GA17:2 ,with a side chain of 13,15,17 alkyl or ethylenic radicals respectively on their benzene loop.

结果纯化的银杏酸5个同系物单体为GA13：0、GA15：1、GA15：0、GA17：1和GA17：2，其母核苯环上分别有1个13、15及17烷基或烯基的侧链。

6 Ppm and 116.8 ppm, attributable to the two tertiary ethylenic carbon atoms

118.6 ppm和116.8 ppm：两个烯基叔碳原子－这样翻译对吗？

The results lent support to the concerted electron-hydrogen atom transfer mechanism for the formal hydride transfer in BNAH mediated reductions of activated ethylenic compounds.

我们也把反应的底物进行了拓展，对反应的机理进行了研究，找到了更多的证据说明了部分协同的电子转移和氢原子转移机理是存在的。

This Thesis consists of the following five pacts: Following a brief Introduction on the mechanism of reactions of coenzyme NADH models with activated ethylenic compounds is discussed. Pross-Shaik treatment is employed to analyze the results.

本论文研究了：(1)辅酶NADH模型物和活化烯烃氧化还原反应的机理，并运用Pross-Shaik构型混合模型分析了这些反应的机理；(2)用辅酶NAD~+／NADH模型物催化氧化一级和二级苄醇，还原α，β-环氧酮。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。