The loop of string makes a handle for the parcel.

细绳结的环做成包裹的拎襻。

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

合成色满衍生物的关键是构建含有手性中心的色满环。

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化钠溶,所生的含溴阳极和碱性阴极,分别是由全氟丙烯合成全氟环氧丙烷的环氧化剂和皂化剂。

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.

介绍了以含1亚氨基2氰基环烷(ICCP)的废渣为原料,制备环酮的工艺过程。

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.

用共能和张力能的计算数据,说明了环丁二烯和环辛四烯的不稳定性与共不矛盾。

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。

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了物理和化学性能表征。

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

辅酶Q10在微生物体内的合成分为芳香环的合成和异烯基侧链的合成。

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%.

在环己烯的氧化反应中,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%,转化率达到33.2%。

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

但目前有关生长因子对纤维环细胞作用的研究少于髓核细胞，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生物的亲核环烷基化、类卡宾加成以及简单环丙烷化合物的衍生化合成等。

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

建立了用高效相色谱(HPLC)/二极管阵列检测器(DAD)测定化妆品中两种香豆素物质——双香豆素和环香豆素的方法。

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化合物的抗真菌活性。