查询词典 benzene

Nanocrystalline Cu films were prepared on an unetched glass substrate by an electroless plating technique with using Sodium Dodecyl Benzene Sulfonate as an additive in the bath.

利用化学镀铜工艺，以十二烷基苯磺酸钠作为镀液添加剂，在未经刻蚀的玻璃表面制备了纳米铜膜。

Unoxidated and oxidized wheat stalks were extracted sequentially with CS2, benzene, methanol, acetone and THF, and the extraction solutions were analyzed with GC/MS. The relative contents and compositions of fractional extracts of un-oxidized and oxidized wheat stalks were compared.

采用二硫化碳、苯、甲醇、丙酮和四氢呋喃对未氧化和氧化的麦秆进行分级萃取，比较麦秆各级萃取物的相对含量和组成差异，并对各级萃取物的组成进行GC/MS分析。

It is easy soluble in water,propylene glycol and glycerol etc,unsoluble in ether,benzene and chloroform.

易溶于水、丙二醇、甘油等，难溶于醚、苯、氯仿，受强热可水解为肌醇和磷脂。

Properlies It is yellow Powder with little osmyland taste bitter. The density is 1.42-1.52. Soluble in ethylacatate, ethanol,solution of NaOH and Na2co3, unsoluble in benzene, water and gasoline.Good storage stablility.

性状 淡黄色粉末，微臭，有苦味，无毒，比重1.42-1.52，熔点170以上，易溶于乙酸乙酯，丙酮，氢氧化钠及碳酸钠的稀溶液中，溶于乙醇，不易溶于苯，不溶于水和汽油，贮存稳定。

A benzene solution of di-methyl oxalate, as an oil phase, and calcium chloride solution, as an aqueous phase, were mixed together at the same volume under both unstirred and stirred conditions.

以二甲基草酸於苯液中之溶液为油相，而以氯化钙溶液为水相，以相同体积比例混合，於无搅拌及有搅拌条件下操作。

The results of calculation will be fundmentally consistent with the experimental values.In addition, we calculated dibenzene chromium and its derivatives, ferroceneand its derivatives. The former had higher symmetry. We studied the substituenteffects by calculating their NMR spectra. The results show that: when we add asubstitute group on one ring of dibenzene chromium, the substitute group will affecttwo benzene rings. The effect is similar to the effect of branched alkanes, namely:the effect on neighbouring groups has transmissibility. Furthermore, the nearer theneighbouring group is, the stronger the effect is. This effect is observed not only onthe substituted ring, but also on the unsubstituted ring.

此外，我们重点计算了二苯铬及其衍生物和二茂铁及其衍生物的核磁共振谱，其中二苯铬及其衍生物选择的是对称性较好的体系，通过计算其核磁共振四川师范大学硕士学位论文谱，探讨其取代基效应，结果表明：在二苯铬的一个环上引入取代基后，取代基对两个苯环的影响，类似于支链院烃引入取代基后的影响：即对邻近基团的影响有传递性，并且对离得近的作用强，对离得远的作用弱，这种作用不仅体现在连有取代基的环上，也体现在没有带取代基的环上。

An adhesive made by dissolving unvulcanized rubber in a solvent like benzene or ''.

将不能硫化的橡胶溶于苯或石脑油等溶剂中制成的粘合剂。

An adhesive made by dissolving unvulcanized rubber in a solvent like benzene or naphtha.

将不能硫化的橡胶溶于苯或石脑油等溶剂中制成的粘合剂。

Unvulcanized rubber in a solvent like benzene or naphtha.

将不能硫化的橡胶溶于苯或石脑油等溶剂中制成的粘合剂。

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法，以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂，质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别；并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

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。