醚的

The liberated freebase methamphetamine which seperates is solvent extrated with two, 75-100 ml ether portions and the ether/amine solution is first washed with 50 mls of distilled water and the ether/amine solution dried with anhydrous sodium carbonate.

The yield is 80 - 88%解放freebase分隔甲基安非溶剂extrated是两个， 75-100毫升醚部分和乙醚/胺的解决办法是第一次洗了50英里的蒸馏水和乙醚/胺溶液干燥无水碳酸钠。

This paper reviews the mechanism of the phase transfer catalytic reaction according to the different compositions of catalytists, including quaternary ammonium salts,polyethylene glycols and grown ethers as well as application of the PTC in Organic synthesis , such as the reaction of,nucleophilic substitution,addition,condensation,oxidation-reduction and so on.

综述了在不同催化剂结构下所遵循的相转移催化反应机理，包括季铵盐类、聚乙二醇类及冠醚类催化机理，以及相转移催化在有机合成中的应用，如亲核取代反应、加成反应、缩合反应、氧化还原反应

Heart rate profiles during the induction of anesthesia differmarkedly between the administration of sevoflurane and halothane.

应用七氟醚和氟烷的麻醉诱导过程中心率的变化明显不同。

Further depression at 1.2 MAC halothane, but not isoflurane, suggests different sites of immobilizing action for these two anesthetics.

氟烷1.2MAC 时有进一步的制，异氟醚却没有，提示了两者固定作用的位点不同。

Onthe other hand, with increased isoflurane or halothane concentration,responses of ventral horn neurons were depressed by 60% and45%, respectively.

另一方面，随着异氟醚或氟烷浓度的提高，腹侧角神经元的反应为从被抑制60％变为了被抑制45％。

The toxic hydrogen selenide gas was reduced, while the utilization of sodium borohydride was over a lot when the PEG-400 instead of ethanol.

相对于乙醇、水等作为介质合成二硒醚，以PEG-400为介质减少了剧毒气体硒化氢的排放，同时硼氢化钠的利用率有所提高。

Polyether antibiotics, also known as ionophore antibiotic, was widely used as high- efficiency, broad-spectrum anti-Coccidiostats, can also be used as animal growth-promoting agent.

中文摘要聚醚类抗生素又称离子载体抗生素，是目前广泛使用的高效、广谱抗球虫药，也可作为畜禽的促生长剂。

Typical precipitatingagents that have been used include sodium or calcium hydroxide , iron sulfide , sodium dimethyldithiocarbamate, sodium hydrosulfite , and starch xanthate.

典型的沉淀已使用的药物包括钠或氢氧化钙，铁硫醚，二甲基二钠，亚硫酸钠，淀粉黄原酸酯。

objective to investigate which stage is the most important and the relationship with kupffer cell,during isoflurane decrease anoxia-reoxygenation injury in isolated rat liver.

目的 明确异氟醚减少离体鼠肝缺氧－复氧损伤的作用主要发生在哪一阶段，以及与枯否细胞的关系。

Objective To investigate stage is the most important and the relationship with kupffer cell,during isoflurane decrease anoxia-reoxygenation injury in isolated rat liver.Methods We established the model of isolated rat liver.

目的 明确异氟醚减少离体鼠肝缺氧－复氧损伤的作用主要发生在哪一阶段，以及与枯否细胞的关系。

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。