醚

The structuresof phosphate polyoxyethylene abietate was identified by IR.

红外光谱表明，合成产物为松香基聚氧乙烯醚磷酸酯。

The acaricidal activity of the extracts of n-butanol and distilled water were not detected in this test.

其中丁香石油醚提取物杀螨活性最为突出，是丁香的主要杀螨活性部位。

Then the extracts of petroleum ether,chloroform,ethyl acetate,n-butanol and distilled water were extracted by solvent extraction,and whose acaricidal activity were detected by killing Psorptes communis cuniculi in vitro.

用石油醚、氯仿、乙酸乙酯、正丁醇、蒸馏水五种溶剂对丁香进行部位提取，采用离体杀螨试验观察各部位提取物的杀螨活性。

The acetated and hydrogenated urushiol dimer has been separated,and studied by hetero-J resolved 2D-NMR,homo- and heteronuclearchemical shift correlation 2D-NMR and long-range coupled chemicalshift correlation 2D-NMR.The results show that the urushiol dimerare most diphenyl and alkyl phenyl ether structures.Furthermore,IR and MS data also has conformed this structures.

本文将酶催化预聚后的生漆，催化加氢后，乙酰酯化，再进行离心旋转薄层层析，分离得到二聚体主要组分，用异核J分辨谱，同核化学位移相关，异核化学位移相关，远程偶合异核化学位移相关等2D—NMR技术，全面研究了其结构，得到了联苯型和烷基芳醚型聚合结构的结论。

This paper details an efficient method for a one-step transformation of the trityl ether to the acetonide. Treatment of trityl ether with a mixture of trifluoroacetic acid, 2,2-dimethoxy propane and camphorsulfonic acid as catalyst in dichloromethane through detritylation followed by acetonization gave the acetonide in high yield.

介绍了一种新的高效的由三苯甲基醚直接生成丙酮化合物的方法，也就是使三氟乙酸条件下脱三苯甲基的反应和生成丙酮化合物的反应在一个反应瓶中同时进行，使脱三苯甲基作用后生成的醇继续反应得到高产率的丙酮化合物。

Objective To study the protective effects of volatile oil of Acorus tatarinowii Schott andβ-asarone on cardiovascular system.

目的 研究石菖蒲挥发油、β-细辛醚对心血管的保护作用。

Objective To explore the effect of Acorus gramineus and its active component a-asarone on apoptosis of hippocampal neurons in young rats with epilepsy induced by pentylenetetrazol.

目的 探讨石菖蒲及其有效成分α-细辛醚对戊四氮诱发的幼鼠癫痫发作所激发的海马区神经元凋亡的影响。

Asarone is one of the main component parts in Acorus graninues Soland.

α-细辛醚是天南星科植物石菖蒲中的主要有效成分之一。

MethodsBase on pharmacokinetics research of β asarone in volatile oil of Acorus tatarinowii Schott in rat serum,to compare the condition of HPLC and sample preparation.

方法在石菖薄挥发油β细辛醚在大鼠的药代动力学实例研究的基础上，对给药剂量、血样采集时间点、生物样品的贮存稳定性、蛋白沉淀剂的种类及剂量、样品提取和制备方法，以及流动相、波长、柱温等参数进行了比较。

From Acropora pulchra and Porites Compressa Dana,a mixture of sterol has been isolated respectively.

从佳丽鹿角珊瑚乙醇提取液的乙酸乙酯部分和扁缩滨珊瑚乙醇提取液中的石油醚部分各分离出一甾醇混合物。

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。