环的

The key step of the synthesis of chroman derivatives is to construct chiral chroman ring.

成色满衍物的关键是构含有手性中心的色满环。

The loop of string makes a handle for the parcel.

细绳结的环做成包裹的拎襻。

Objective:To study the antifungal activity of triazole alcohols by introduction of cyclopropyl as side chain.

研究具有环丙基结构的三唑醇类物的抗真菌活性。

A method for simultaneous separation and determination of two coumarins,dicumarol and cyclocoumarol,in cosmetics by HPLC-diode-array detector(DAD) was developed.

用高效液相色谱(HPLC)/二极管阵列检测器(DAD)测定妆品中两种香豆素物质——双香豆素和环香豆素的方法。

Nowadays, the study regarding the effect of growth factors on annulus fibrosis is less than that of nucleus pulpous.

但目前有关长因子对纤维环细作用的研究少于髓核细，有待加强。

General approaches involve the nucleophilic cycloalkylation, carbenoids addition of certain amino acid derivatives and derivatization from simple cyclopropane compounds.

制备方法包括对简单氨基酸衍物的亲核环烷基、类卡宾加成以及简单环丙烷物的衍成等。

In the oxidation reaction of cyclohexene, total selection of cyclohexene oxide, cyclohexanol, cyclohexenol and 2-cyclohexene-l-one reaches 98.5%, conversion reaches 33.2%.

在环己烯的氧反应中,对环氧环己烷、环己醇、环己烯醇和环己烯酮的选择性共达到98.5%,转率达到33.2%。

The biosynthesis of coenzyme Q10 in microorganism has two pathways: the quinoid nucleus biosynthesis and the isoprenoid side chain biosynthesis.

辅酶Q10在微物体内的成分为芳香环的成和异戊烯基侧链的成。

Scaning electron microscopy and cyclic voltammetry are applied to characterize both the physical and chemical properties of the Ag ring ultramicroelectrode.

用扫描电子显微镜和循环伏安法对制备的环电极进行物理和学性能表征。

I also think impassability, they so southwest the place of 4 wreaths, how run to recruit a person in the pass village.

我也想不通，他们那么西南4环的地方，怎么跑到中关村去招人。

The data calculated by the use of resonance energy and tension energy show that the unstability of cyclobutadiene and cyclooctatetraene are not contradictory with resonance theory.

用共振能和张力能的计算数据,说明环丁二烯和环辛四烯的不稳定性与共振论并不矛盾。

This paper describes the technical pracess of the synthesis of cyclopetanone which is prepared by taking the waste residue consisting of 1 imino 2 cyanocyclopentane(ICCP) as a raw material.

介绍以含1亚氨基2氰基环戊烷(ICCP)的废渣为原料,制备环戊酮的工艺过程。

A divided flow cell is used for electrolysis of NaBr aqueous solution.The anolyte containing Br 2 and catholyte containing NaOH are produced simultaneously and in turn to epoxide HFP to HFPO.

在由离子膜分隔的电解槽中电解溴钠溶液,所产的含溴阳极液和碱性阴极液,分别是由全氟丙烯成全氟环氧丙烷的环氧剂和皂剂。