醚

The effects of the brominated flame retardants, especially PBDPO, on the environment and human's health are attracted more and more attention.

阐述了溴系阻燃剂，特别是多溴二苯醚对环境保护及人类健康的影响和危害，包括BFR从阻燃材料中的逸出、在环境中的滞留、在生物体内的积累、燃烧产物的毒性等有关问题，并介绍了有关十溴二苯醚应用前景的最新信息。

Result: The anticancer active component includes: taxol 9.45%、cephalomanine: 9.63%、10- deacetylbaccatinⅢ: 22.64%、total flavonoids: 19.15%. 3. The preparation of Seiadopitysin control Methods: Take dry Ginkgo leaves and extracted three times by sonication with 95% EtOH, solutions were concentrated under vacuum, after defatting by petroleum benzin, the sample was extracted with EtOAc and the solutions were concentrated under vacuum.

金松双黄酮对照品的制备方法：取干燥银杏叶以95％乙醇超声提取3次，提取液合并，减压浓缩，石油醚脱脂后，用乙酸乙酯萃取，萃取液减压浓缩，经硅胶柱(6cm×80cm)层析，石油醚-乙酸乙酯(9∶1～5∶5)梯度洗脱，产物用甲醇多次冲淋，再以二甲基甲酰氨溶解，反复重结晶，得黄色粉末结晶。

Coordination polymers of dimethyl sulfide: Using P2S5 as deoxygenating agents, three coordination polymers containing dimethyl sulfide, [4(CH3SCH3)3]n (34) and n X = Cl(35, Br(36) have been successfully synthesized.

硫醚类化合物本文首次利用P2S5作为有机物的脱氧剂，在溶剂热条件下，成功地合成3种亚铜甲硫醚配位聚合物[4(CH3SCH3)3]n (34)和n X = Cl(35， Br(36)。

After induction, a depolarizing or non-depolarizing neuromuscular blocking drug can be given intravenously to facilitate tracheal intubation.

吸入诱导：吸入一氧化氮加上强有力的挥发性麻醉剂（如氟烷、安氟醚或异氟醚），能在3－5分钟内诱导麻醉，诱导后可经静脉给予去极化或非去极化的神经肌肉阻滞剂，以利于气管插管。

Flame retardant ; bis-sulfone ; bis-sulfone ; etherizing ; phase transfer catalysis ; allyl chloride

阻燃剂；四溴双酚S双烯丙基醚；四溴双酚S ；醚化；相转移催化；烯丙基氯

Therefore, much attention has been focused on the preparation of soluble aromatic polyether, and fluorinated polys is a very important field in these research work.

所以，制备可溶性的聚芳醚一直是人们研究的重点，而含氟聚芳醚是其中一个非常重要的研究方向。

Sevoflurane was synthesized from 1,1,13,3,3-hexafluoro-2--propane by halogen-exchange in the presence of an ionic liquid as the solvent and a fluorinating agent .

在离子液体作为反应介质的条件下，以六氟异丙基氯甲基醚的氟代反应合成了七氟醚。

In this project, we have prepared conveniently Si-Mg 1,1-difunctional group reagents-α-silylvinyl Grignard reagents by hydromagnesiation of alkynylsilanes; Se-Br 1,1-difunctional group reagents-α-bromovinylselenides by hydrobromination of alkynylselenides; Sn-Br and Sn-I 1,1-difunctional group reagents by hydrozirconation of alkynylstannanes followed by halogenating reaction.

本项目通过炔基硅烷的镁氢化反应，方便地制得了Si-Mg 1，1-双官能团试剂-α-硅基烯基镁化物；通过炔基硒醚的溴氢化反应，方便地制得了Se-Br 1，1-双官能试剂-α-溴代烯基硒醚；通过炔基锡烷的锆氢化反应，继而卤代方便地制得了Sn-Br和Sn-I 1，1-双官能试剂。

Consisting only of PEEK polymer, any scrap and end of life parts can be fully recycled, providing further advantages over traditional phenolic/aramid fiber and aluminium based honeycombs.

含有聚醚醚酮聚合物的任何废料和废件可以完全回收利用，比传统的酚醛/芳纶纤维，铝基蜂窝芯材更有优势。

Polyether modified polysiloxane is a new multi-functional fine chemical product. And it is made from inarching polyether segment on the branched chain or terminal chain of active polysiloxane.

聚醚改性聚硅氧烷是一类新型的多功能的精细化工产品，它通过活性聚硅氧烷的支链或链端上接聚醚链段而得到。

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。