甲胺

The calculated results indicate that water in two of them can protect formamide from tautomerizing, while in the third one works oppositely, exactly the same as the situations in gas phase.

使用B3LYP密度范函的计算方法，在B3LYP/6-311++G**的基组条件下运用SCRF溶液模型研究了溶液环境对甲酰胺互变异构的影响。

Firstly, by the addition of formamide to 8% into the reaction buffer, conventional PCR technique is used to amplify the GC-rich TGF β1 mature peptide gene encoding the TGF β1 monomer.

首先，采用常规的PCR技术，通过在反应混合物中加入8％的甲酰胺，成功地扩增了高GC含量的、编码人TGFβ1单体分子的成熟肽基因。

The composing of CPA is: 25% DMSO,17% formamide, 10% propane-1, 2-diol and 6% PEG.

联合玻璃化保护剂的组成为：25％DMSO、17％甲酰胺、10％1，2-丙二醇和6％聚乙二醇。

To further explore the origin of the blue shift for C-H bond not directly participating in H-bond formation, we present a theoretical investigation on the complexes formed by formamide and small molecules such as HF et al.

为了进一步研究不直接参与氢键形成的C-H键蓝移的起因，我们对甲酰胺和HF等小分子形成的氢键复合物进行了理论计算研究。

It is revealed that a certain amount of excessive formamide is favorable for preparation of the aerogel with high porosity, while more excessive glycol can deteriorate the formation of nano-porous SiO2 aerogel network. Additionally, the pH value of the reaction system has a strong impact on the microstructure and properties of prepared SiO2 aerogel.

研究发现：微过量的甲酰胺，有利于高孔隙率气凝胶的合成；过量的乙二醇的引入不利于低密度气凝胶的形成；pH值对合成气凝胶的性质也有较大的影响。

The influence of polyvinyl pyrrodione k 30 and N,N dimethyl formamide on formation and size of the uniform α Fe 2O 3 particles prepared by microwave irradiation was researched in this article.

本文研究了聚乙烯吡咯啉酮和N，N－二甲基甲酰胺两种试剂对微波辐射制备均分散α－Fe2O3纳米粒子的影响。

Antifolate Alimta derived from pyrrolo[2,3-d]pyrimidine is a multitargeted antitumor agent, it can inhibit at least five major folate-dependent enzymes: thymidylate synthase, dihydrofolate reductase, glycinamide ribonucleo -tide formyltransferase, aminoimidazole ribonucleotide formyl transferase and C-1 tetrahydrofolate synthetase(C1-S).

吡咯并[2，3-d]嘧啶类叶酸拮抗剂Alimta是一种多靶向的抗癌药物，它能抑制至少五种叶酸依赖性酶：胸苷合成酶、二氢叶酸还原酶、叶酰多聚谷氨酸合成酶、甘氨酰胺核糖核苷酸转甲酰酶及C1-四氢叶酸合成酶(C1-S)。。

Azodicarbonamide is of interest as a flour improver, since it improves not only the dough properties of weak gluten flour, but also lowers the energy input in dough mixing.

偶氮甲酰胺是一种令人很感兴趣的面粉改良剂。它不仅仅改善了含有微弱面筋含量的面粉的面团特性，而且降低了面团混合过程中的能量输入。

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

In this thesis, a series of derivatives of -Huperzine A and benzylpiperidine were designed and synthesized, including nonsteroidal anti-inflammatory drug derivatives, heterocycle derivatives, aromatic derivatives and its sckiff derivatives, etc.

全部目标化合物进行了胆碱酯酶的活性测试，石杉碱甲类衍生物的乙酰胆碱酯酶活性比母体差，说明该类取代基在胺基上取代可能会使石杉碱甲衍生物的活性降低。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。