查询词典 benzene

The experiment results indicated that the comprehensive interaction mode of Y with DNA might be that the dibenzofuran ring of Y intercalated into DNA base pairs and the benzene ring in side chain bind to DNA in the groove.

以曙红Y为模型化合物，实验表明可能Y中的二苯并吡喃环嵌入了DNA的碱基对之间，其侧链的苯环键合在DNA的沟槽中。

The structural characteristics of the ligand of the chiral Schiff base are that the ligand has phenol hydroxyl, alcoholic hydroxyl and an imine group, one to three bromine atoms are provided on the framework of double benzene nucleus, and chiral carbon is connected with the nitrogen atom of imine.

手性西佛碱配体的结构特征为含有酚羟基、醇羟基和亚胺基团，在萘环骨架上带有一至三个溴原子，手性碳与亚胺的氮原子相连。

The less rate of L acid at 1440cm-1 to total acid is, the more intensive the catalytic property is for reaction between benzene and benzyl chloride.

对于苯与氯化苄的反应，L酸1440cm(-1)附近吸收所占总酸量的比例越小，催化剂的催化性能越强。

He experimented with the brine-soaked coffee, and found out that benzene could be used as solvent to bond with the caffeine.

他尝试用盐水浸泡咖啡，并发现，苯可作为溶剂，以债券的咖啡因。

Aniline and nitro-benzene in air and water can be identified by nitro and phosphor detector with large diameter capillary in quantitative analysis method.

采用大口径毛细管色谱柱和氮磷检测器建立了水及空气中苯胺及硝基苯的定量分析方法，线性范围0 ~ 80μg /L，检测下限1μg /L，重现性好，结果令人满意。

With 4 Xiu Shuang phenol - A and solid smooth air is raw material, dissolve it in 1 in, 2- 2 chlorine ethane solvents, slow drop adds 3 Yi Ans to carry out solution get together , with 3 Xiu benzene phenol does end dose, thick product sinks by industrial alcohol Xi after, take out to strain , wash is dry , grind white powder form flame retardant assemble carbon sour ester product.

以四溴双酚-A、固体光气为原料，将之溶解在1，2-二氯乙烷溶剂中，缓慢滴加三乙胺进行溶液聚合，以三溴苯酚做封端剂，粗产品经工业酒精沉析后，抽滤，洗涤，干燥，研磨得白色粉末状阻燃聚碳酸酯产品。

A 2006 study found abnormally high levels of chemicals in the benzene family attached to coal dust around Handan.

一项2006年的研究表明，邯郸的空气中含有大量的煤灰，其中苯化合物的含量异常高。

The distillation analysis, which is slow, harmful to human and would bring rather large error according to the used analyzing method, was used before in Coke Plant, Handan Iron and Steel Company for analysis of light benzene .

邯钢焦化厂的轻苯分析以往采用的是蒸馏分析法，其速度慢，分析时受方法的限制误差很大，且对人身体造成很大伤害。

The regression equations could be used to estimate the BCF of the benzene derivatives in grass crap , and the results were not affected by the polarity of stationary phases.

统计检验表明，两类估算方程在不同固定相上的平均相关系数分别为0·952和0·965，均呈极显著相关(P·01)，可用于估算取代苯类化合物在草鱼体内的BCF，估算结果不受固定相极性的影响。

To estimate the bioconcentration factor of benzene derivatives in fish by gas chromatography retention time, this paper measured the BCF of chlorobenzene, o-chloro-toluene, p-dichlorobenzene, m-dichlorobenzene, 1,2-dichlorobenzene, nitrobenzene, p-chloro-aniline, p-chloro-nitrobenzene, and 4-chlorodiphenyl in grass crap, and the t_R of test derivatives on the stationary phases of six kinds polarity.

为了用气相色谱保留时间估算取代苯类化合物在鱼体内的生物富集系数，测定了草鱼对氯苯、邻氯甲苯、对二氯苯、间二氯苯、邻二氯苯、硝基苯、对氯苯胺、对硝基氯苯、4-氯联苯9种取代苯类化合物的BCF和不同取代苯化合物在6种不同极性固定相上的tR，建立了tR与BCF的一元回归方程及tR一阶分子连接性指数(1XV)与BCF的二元回归估算方程。

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。