查询词典 amides

In our previous research, we found lithium ion played a crucial role on the stereoselective tuning of the cyclopropanation reaction of telluronium allylides with α,β-unsaturated esters or amides.

前述工作中，我们发现锂离子对烯丙型碲叶立德和 a ， b -不饱和酯、酰胺反应的立体化学控制起着重要的作用。

It is found that the stereochemistry of the reactions of telluronium allylide,crotonylide and trimethylsilyallylide with α,β-unsaturated esters and amides can be tuned by thechoice of reaction conditions.

利用反应条件的变化首次实现了烯丙基、巴豆基、含硅烯丙基碲叶立德与α，β-不饱和酯、酰胺进行环丙烷反应的立体化学调控，能高立体选择性地、高效率地合成两种不同几何异构体中的一个。

However, the ratio of the unsaturated and saturated fatty acid amide is relatively stable in downcore indicating that there is no selectivity between those two types of fatty acid amides during diagenesis processes, including biological, chemical and physical degradation. For this reason, we suggested that the depositional environment in Qarhan paleolake was relatively aerobic during the organic component deposition.

另一方面，不饱和脂肪酸酰胺与饱和脂肪酸酰胺的相对量的比值在剖面上并没有呈现明显下降的趋势，说明各种生物、物理及化学作用对饱和与不饱和脂肪酸酰胺的降解过程不存在明显的选择性，指示了有机质在沉积过程中处于一个偏氧化的环境。

Depletion of soil nitrogen frequently leads to reduced concentrations of soluble amino and amides.

土壤氮素的减少常常导致可溶性氨基酸和酰胺浓度的降低。

The paper is composed of two parts:In the first part, the photo-reaction of amides irradiated by 254 nm ultraviolet light is investigated.

本论文主要分两部分：第一部分主要对酰胺类化合物在254 nm紫外光激发下的光化学反应进行了研究。

The volumes, of transfer of amino acids were discussed in terms of solute-solute interaction between amino acids and amides.

结果表明：1三种氨基酸从水到酰胺衍生物水溶液中的迁移体积与氨基酸和酰胺的相对疏水性有关。

However, no examples of a copper-catalyzed combination of N-alkenylation and N-alkylation of amides had been reported.

然而，组合铜催化的酰胺N—烯基化和N—烷基化偶联生成二氢吡咯衍生物的反应未见文献报道。

History is the mighty Tower of Exrerience,which Time has built amides the endless fields of bygone ages.

历史是经验的巨塔。岁月在无限的往昔狂野中，建立此巨塔。

Our fatty acid amides add slip to plastic surfaces, so plastic bags can be easily peeled apart.

我们的脂肪酸氨基化合物能使塑料制品表面更光滑，所以塑料袋能很容易地分开。

"There are no practical natural sources of simple covalent amides, but the peptides and proteins in living systems are long chains with peptide bonds, which are amide linkages."

简单的有机共价醯胺没有实际的天然来源，然而生命系统中的和蛋白质都是些带键的长链，这些都是醯胺链接。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。