乙醚

The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.

最佳结果为：芳胺与七氟异丙基碘的物质的量比1：1.1~1.5，连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3，相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1，溶剂总用量使苯胺浓度在0.5~1.0 mol/L；反应温度10~20℃；溶剂采用乙醚。取代基供电子性越强，反应时间越短，产率越高；氨基的对位优先反应，氨基的邻位较难发生反应；且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。

BARIUM CHLORIDE: Melting Point 962'C, It absorbsmoisture in air to form double hydrated salt.

白色晶体，有具毒，易溶于水，不溶于乙醇或乙醚中，氯化钡：熔点962'C，在空气中吸收水份形成二水结晶。

Some have such a vast appetite for the former commodity, that is, the news, and such sound digestive organs, that they can sit forever in public avenues without stirring, and let it simmer and whisper through them like the Etesian winds, or as if inhaling ether, it only producing numbness and insensibility to pain —— otherwise it would often be painful to bear —— without affecting the consciousness.

有些人，对于前一种的商品，即新闻，是胃口大，消化能力也一样大的，他们能永远一动不动地坐在街道上，听那些新闻像地中海季风般沸腾着，私语着吹过他们，或者可以说，他们像吸入了一些只是产生局部麻醉作用的乙醚，因此意识还是清醒的，苦痛却被麻痹了，——要不然有一些新闻，听到了是要使人苦痛的。

The results of comprehensive evaluation indicated that the effect of the suitable concentration extracts were better, the effect of Ether extract 1000mg/L

提取物浓度与抗寒效果之间无明显的相关性，植物材料前胡的抗寒作用可能是前胡乙醚、丙酮、三氯甲烷等提取物中一种或多种成分的诱导和保护作用的共同结果。

Result The conditions for GC-MS of Rhizoma Ligusticum chuanxiong and the characteristic fingerprint was established. The components of chuanxiong's ether extract were analyzed.

结果：确定了气质联用分析条件，分析了川芎乙醚提取液的化学成分，建立了川芎的特征指纹图谱。

The ether extract content at different part of Yunnan pine individual was studied by adopting one experimental site and two natural superior stands as the targets.

以云南松的一个试验点和两个天然优良林分为对象，研究了云南松个体不同部位乙醚提取物含量的特点。

In spite of this, we might have to revisit the ether concept.

尽管如此，我们可能要重新乙醚概念。

Therefore I thought in 1905 that in physics one should not speak of the ether at all.

因此，我认为，在1905年，在物理学不应该谈论的乙醚可言。

A solution made of gum and ether and used to attach ''.

橡胶和乙醚制成的溶液，用于将''。

All rats were collected heart blood following etherization.

各组白鼠在实验条件施加后分别于相应时刻，依次用乙醚麻醉，进行心脏采血。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。