醚

Rubidium and rhenium in rock samples are satisfactorily determined by neutron activation method.

冠醚的选择性定量溶剂萃取已较好地应用于中子活化分析岩石中微量Rb和Re。

The rheological properties of poly with different molecular weight have been measured using cone/plate rheometer.

用锥板流变仪测试了分子量不同的国产聚醚砜样品的流变性能。

The structure, character, synthetic method and the applied range of synthetic perfume, such as hydrocarbon, alcohol, aldehyde, ketone, carboxylic acid, ester, lactone, organic nitrile, nitro compound and heteroatomic ring compounds are comprehend.

理解烃、醇、醚、酸、酯、杂环及芳香类香料的结构、性质、合成方法和应用范围。

Compositions: deionized water, roseleaf, rose essential oil, rose extract, coco-glucoside, CAB-35, lauryl alcohol polyether ammonium sulfate, DMDM glycolylurea

成份： 去离子水、玫瑰花瓣、玫瑰精油、玫瑰花提取物，椰油基葡糖苷，椰油酰胺丙基甜菜碱，月桂醇聚醚硫酸铵， DMDM 乙内酰脲。

We established a method for quantitative analysis of methyleugenol and safrole in Asarum hete rotropoides by GC to study their season variation.

对北细辛不同生长期所含甲基丁香酚和黄樟醚用气相色谱法进行了定量分析。

Adopt orthogonal experimental design to optimize chemical technology of detaching safrole and refining citral from Zhejiang volatile oil;use compacting method to prepare soft capsule and research making craft condition;use gas chromatography to Zhejiang volatile oil, take off poisonous oil an...

采用正交试验设计对用化学法从者姜挥发油中除去黄樟醚及精制柠檬醛进行工艺优选；采用压制法制备软胶囊，研究制备工艺条件；用气相色谱法对者姜挥发油、脱毒油和者姜心脑康软胶囊进行质量控制，建立质量标准。

Firstly, Polystyrene-supported benzyl selenide has been prepared from 1% cross-linked polystyrene resin.

一、以1%交联的聚苯乙烯为载体，首次合成了聚苯乙烯负载的苄基硒醚。

Because〓 supported on silica is soluble inmethanol, active center of supported 〓 catalyst is able to elapse. The saltsin which ion semidiameter are larger, are ideal solid acidic catalyst, because of theirhigher activities, insolublilities in methanol.

离子半径较大的负载型磷钨酸盐除具有较高活性外，由于不易溶于极性溶剂，因而催化剂活性稳定性强，是一种理想的固体酸醚化催化剂。

The rubber products made of hydrated silica feature transparency and semitransparency, so it is a special raw material for making light-and multi-colored rubber products such ad high-grade hiking shoes, sports shoes, rubber tapes, tires etc.

用白炭黑制成的橡胶制品有明显的透明、半透明性，尤其适用于浅色、彩色橡胶制品、高级轻便旅游鞋、运动鞋、胶带、轮胎、玻璃胶、粘胶、可再分散型乳胶粉、纤维素醚等行业。

The classes of these compounds included triterpenoid, diterponid, sesquiterpene, steroid, lignan, flavone, coumarin, phenol, and fatty acid.

已鉴定的化合物类型涉及单萜、环烯醚萜、倍半萜、二萜、三萜、木脂素、黄酮、脂肪酸、甾醇、香豆素、酚酸和其它类型的化合物。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。