醚

Benzyl ether is easy to condensed from benzyl chloride in the presence of alkali. In order to prevent production of benzyl ether, benzyl chloride must not contact with alkali.

由于氯化苄在碱作用下容易生成二苄醚，为了减少二苄醚的生成，必须避免氯化苄与碱的直接接触。

Aspartate aminotransferase, alanine aminotransferase, total bilirubin, alkaline phosphatase, choline esterase, albumin, prothrombin time, and platelet count were measured before and 1, 3, and 7 days after surgery.

异氟醚组的这些变量的升高显著大于七氟醚组。

Aspartate aminotransferase, alanine aminotransferase, total bilirubin, alkaline phosphatase, choline esterase, albumin, prothrombin time, and platelet count were measured before and 1, 3, and 7 days after surgery.

异氟醚组的这些变数的升高显著大於七氟醚组。

Two kinds of polyimide films were prepared based on the ODA and ODPA in NMP through two-step thermal or chemical imidization process and characterized by the cone and plate viscosimeter, GPC, FTIR, DSC, TGA and strain properties tests.

以4，4'-二胺基二苯醚和3，3'，4，4'-二苯醚四酸二酐为单体，采用两步法，分别经热亚胺化和化学亚胺化过程制备了两种聚酰亚胺薄膜，并对两种薄膜的性能进行了表征。

The glass transition temperature of the polymers carrying crown ethers as side groups increased when alkali metal ions were added, because the oxygen-metal coordination will lead to the polymer to have order structure.

含有冠醚侧链的高分子在加入碱金属离子后，由于冠醚与金属离子的络合作用导致高分子形成有序结构而刚性增强，其玻璃化转变温度明显提高。

The synthetic technique of anionic surfactant sodium dodecyl diphenyl ether disulfonate was studied.The best reaction conditions were determined.Alkylation was carried out with n∶ n=5∶1 at 70 ℃ for 5 h to attain 82% yield.

研究了十二烷基二苯醚二磺酸钠阴离子表面活性剂的合成工艺，得出烷基化的最佳反应条件为：催化剂用量为n∶n =5∶1；反应时间 5h ；反应温度 70℃；二苯醚的转化率 82 %。

A study has been made on Synthesis of poly with diphenyl ether and terephthaloyl chloride as reactants, 1,2 dichloroethane as solvent, and aluminum chloride as catalyst.

研究了以1，2－二氯乙烷为溶剂，以无水三氯化铝／DMF为复合催化剂体系，在温和条件下，以二苯醚和对苯二甲酰氯为原料合成高分子量聚醚酮酮的方法。

Dissolve 50.0g of polyethylene glycol in 75ml of diphenyl ether, previously warmed, if necessary, just to melt the crystals, in a 250ml distilling flask.

你的理解好像是必要时加入聚乙二醇和二苯醚后一起加热，而我的理解是必要时加入聚乙醇后用预先加热的二苯醚溶解。

Rhesus macaques were induced by isoflurane for endotracheal intubation. TheMACiv. and MACmhal were determined separately by means of "up and down".The concentrations of isoflurane in inspired gas, end tidal gas and artery blood were determined at 0.5MAC and 1 .0MAC, respectively.

猕猴5只，吸入异氟醚诱导后行气管插管，当呼气末浓度低于0.2％后，采用自身前后对照，&上下法&分别测定MAC_MAC_，测定0.5、1.0MAC的吸入气、呼气未气和动脉血异氟醚浓度。

Results showed that the optimum condition in carboxy methylation were: 15 percent sodium hydroxide , 20 % chloroacelic acid, alkalified 35℃, etherification 50℃, etherification time 120 min.

甜菜膳食纤维羧甲基化改性的最佳条件：15％氢氧化钠、20％一氯乙酸、35℃碱化温度、50℃醚化温度、2.0h醚化时间。

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。