查询词典 aldehyde anise

A range of oligoaryls having alternating para- or meta-benzene-furan rings is synthesized by rapid convergent/divergent method from the annlation of a propargylic dithioacetal and an aldehyde having a propargylic dithioacetal moiety as the substituent.

中文摘要结合分流法/汇集法，利用炔丙基硫缩酮单体和另一具有醛基的单体进行环化反应，可以迅速合成对位及间位取代苯环呋喃交错寡聚物。

Some aqueous catalysis systems have been applied in the industrial production of butyl aldehyde by propene hydroformylation.

其中水溶性催化剂体系已经用于丙烯氢甲酰化反应制备丁醛的工业化生产，然而，长链烯烃在含有催化剂的水相中溶解性较差，反应速率较慢。

A series of secondary pollutants with small molecule are produced from these reagents,such as ethanol,aldehyde,acetone,acetonitrile,propionitrile,isobutanol...

药剂在降解的过程中会产生乙醇、乙醛、丙酮、乙腈、丙腈、异丁醇、戊醇等一系列小分子二次污染物。

Objective: To separate and determine the content of protocatechuic aldehyde in Danshen Injection by TLC-UV method.

目的：建立薄层层析-紫外分光光度法测定丹参注射液中原儿茶醛的含量。

Conclusionph and the quality of danshensu,protocatechuic aldehyde and salvianolic acid b is stable.

结论配伍液中丹参素、原儿茶醛、丹酚酸b的质量和ph值基本稳定。

MethodsA gradient HPLC system was used in the quantitative analysis of the Danshensu ,protocatechuic aldehyde and salvianolic acid B in 6 hours,and its pH was determined at 25℃for 24 hours.

并在25℃时24 h测定配伍液的pH值。

Methodsa gradient hplc system was used in the quantitative analysis of the danshensu ,protocatechuic aldehyde and salvianolic acid b in 6 hours,and its ph was determined at 25℃for 24 hours.

方法采用高效液相色谱法梯度洗脱测定配伍液中6 h内丹参素、原儿茶醛、丹酚酸b的含量。并在25℃时24 h测定配伍液的ph值。

Objective To study the effects of carbon, nitrogen, and phosphate sources on the growth of Salvia miltiorrhiza adventitious roots and the contents of tanshinone Ⅱ and protocatechuic aldehyde.

目的 研究碳源、氮源和磷源对丹参Salvia miltiorrhiza不定根生长及其有效成分丹参酮Ⅱ和原儿茶醛量的影响。

Methods:The RP-HPLC method was applied and protocatechuic aldehyde was used as the internal standard substance.

采用RP-HPLC法，以原儿茶醛为内参照物，色谱柱：Luna C_(18)柱(250mm×4.6mm，5μm)，流动相：0.05%磷酸水溶液-乙腈，梯度洗脱程序为：0min时A-B(100∶0)，80min时A-B(67∶33)，85min时A-B(60∶40)，100min时A-B(60∶40)，流速：1.0mL·min~(-1)，检测波长：280nm。

Results:The contents of tanshinoneⅡA and protocatechuic aldehyde in alcoholic extract of raw products were the most.

结果：丹参酮ⅡA和原儿茶醛以生品醇提最高；丹参酮ⅡA以其生品水提最低，而原儿茶醛以白酒炙后水提最低。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。