查询词典 alkaloids

Nitrogenous compounds such as alkaloids interfere with the KF chemistry and may give misleading results.

像生物碱那样的含氮化合物会干扰KF的化学性质，并且可能给出错误的结果。

Abstract］ Objective:To select the endophytes in Dendrobium nobile Lindl and increase the yield of alkaloids by improving fermentative conditions.

［摘要］目的：筛选石斛假鳞茎中产生物碱的内生菌并通过培养优化提高次生代谢产物的含量。

Methods: The strain of endophytes which could produce alkaloids was isolated from Dendrobium nobile Lindl, and the fermentative conditions were also studied.

从新鲜石斛中分离生物碱产生菌，并对其发酵条件进行研究。

Opium comes from alkaloids found in the latex of the opium poppy.

鸦片是罂粟植物胶乳中的一种生物碱。

Overman and co-workers have recently made several important contributions to the synthesis of this family of alkaloids.

Overman 和他的同事们在近期就合成这个属类的生物碱做出几个重要的贡献。

MethodsTo extract the alkaloids of Radix Tinospora with different solvents,reckon the ratio,determine Jatrorrhizine Hydrochloride and Palmation Hydrochloride by HPLC,taking this as the indexes,to ascertain the optimum extraction technology.

方法用不同极性的溶剂对金果榄进行提取，计算出膏率，采用高效液相色谱法测定金果榄中生物碱的含量，以此做为定量指标，确定最佳提取工艺。

Lots of alkaloids in grass-fungal parasitism associations were toxic to animals and human.

不但会引发植物的麦角病造成作物减产，还会引起人和牲畜的中毒。

OBJECTIVE To observe the effects of phenolic alkaloids of menispermum dauricum on platelet aggregation and explore its mechanism.

目的 观察蝙蝠葛酚性碱对血小板聚集的影响，探讨其抗血小板聚集的作用机制。

Piperidine alkaloids are widespread in nature and many piperidine-ring containing compounds exhibit significant biological activities.

中文摘要：含哌啶环化合物大多具有重要的生理活性，在医药、生化和临床上具有广阔的应用前景。

In this thesis, we developed a new method to construct 2, 3, 6-trisubstituted piperidines using enantiopure -amino acid derivatives as the starting material and applied them to the synthesis of some piperidine alkaloids which showed interesting physiological activities.

本论文中，我们从非手性原料出发，通过手性胺对、(-不饱和酯的Michael加成来获得光学纯的-氨基酸酯，发展了一种构建2、3、6-三取代哌啶环的方法，并利用这种方法合成了一些具有重要生理活性的生物碱类天然产物。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。