异构体

In the forth part, the heterotactic enthalpic pairwise interaction coefficients between amino acids and butanediol isomers (1,3-butanediol, 1,4-butanediol and 2,3-butanediol) at 298.15K and 310.15K are discussed.

第五部分：采用密度泛函理论等方法研究了甘氨酸分子分别与丁二醇的三种异构体分子以1：1的比例形成的氢键络合物，从B3LYP6-31G到6-31 G基组水平进行了优化，利用结合能数据讨论了焓对作用系数的差别。

Residues of hexachlorocyclohexane isomers in human milk of two population from beijing and shenyang,china were studied.

在人口的2人乳六六六异构体的残留量从北京，沉阳，中国进行了研究。

At first, the concentration distribution of four main hexachlorocyclohexane distributing isomers in Xingang Harbour marine water and Haihe River estuarine water was investigated and for the first time, the ERs of α-HCH in the above two waters were studied.

首先，调研了天津新港港湾水和海河河口水中六六六主要异构体(α-、β-、γ-、δ-)的分布，并首次测定了以上两天然水体中α-六六六的ER值。

Computation was made to investigate the solidification points of three isomers of hexadecane and the mixtures of hexadecane with two different alkyl naphthalenes by molecular dynamics.

利用分子动力学模拟手段对十六烷的3种异构体及添加烷基萘的混合物的凝点进行计算。

Computation was made to investigate the solidification point s of three isomers of hexadecane and the mixtures of hexadecane with two different alkyl naphthalenes by molecular dynamics.

利用分子动力学模拟手段对十六烷的3种异构体及添加烷基萘的混合物的凝点进行计算。

A soft, steel-gray to black, hexagonally crystallized allotrope of carbon with a metallic luster and a greasy feel, used in lead pencils, lubricants, paints, and coatings, that is fabricated into a variety of forms such as molds, bricks, electrodes, crucibles, and rocket nozzles.

石墨：一种质软、钢灰黑色、有金属光泽和滑腻感的碳的六方晶形的同素异构体，用于铅笔、滑润剂、颜料和涂层，可被制成多种形状，如模子、砖块、电极、坩埚和火箭发动机喷管也作 black lead ， plumbago

The results indicate that little conversion of iodobenzene was observed on unmodified carrier supported catalysts; and a conversion of 100% and a selectivity of above 98% to trans-isomers were found over 10%Cu/5%KF/ZnO, 20%Cu/10%KF/ZnO.

结果表明，对碘苯与丙烯酸正丁酯的Heck反应的催化性能，未改性催化剂基本没有活性，而改性后，10%Cu/5%KF/ZnO、20%Cu/10%KF/ZnO催化剂的催化转化率为100%和反式异构体的选择性为98%以上。

A separation model of ionizable and neutral enantiomer s with cyclodextrin-sodium dodecyl sulphate micellar electrokinetic chromatography was established.

建立了环糊精-十二烷基硫酸钠胶束电动色谱中可电高及电中性-光学异构体的分离模型。

High speed countercurrent chromatography was successfully used for the separation and preparation of isomeric compounds .

应用高速逆流色谱法对同分异构体的分离纯化进行研究。

Any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent .

这种碳氢化合物的任何一种同分异构体，见于石油中，用作燃料和溶剂。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐