水醇的

The influences of water carrier, catalyst and the ratio of the acid to the alcohol on esterification were studied.

讨论了带水剂、催化剂、醇酸比等因素对酯合成的影响。

The present invention relates to a process for rapid solution synthesis of a peptide, the process comprising repetitive cycles of steps-: a coupling step, using an excess of an activated carboxylic component to acylate an amino component, a quenching step in which a scavenger is used to remove residual activated carboxylic functions, wherein the scavenger may also be used for deprotection of the growing peptide, one or more aqueous extractions and optionally, a separate deprotection step, followed by one or more aqueous extractions, characterised in that the process comprises at least one step, referred to as step, in which an amine or a thiol comprising a free anion or a latent anion is used as a scavenger of residual activated carboxylic functions.

本发明涉及快速溶液合成肽的方法，该方法包括步骤-的重复循环：偶联步骤，使用过量的活化羧基成分酰化氨基成分，淬灭步骤，在该步骤中使用清除剂除去残余的活化羧基官能团，其中该清除剂还可以用于使生长中的肽去保护，一或多个水抽提和任选地，独立的去保护步骤，之后进行一或多次水抽提，其特征在于该方法包括至少一个步骤，称作步骤，在该步骤中包含自由阴离子或潜阴离子的胺或硫醇用作残余活化羧基官能团的清除剂。

Methods: from prepation of crude drug as start, study the technology of extract and defat with L9 (3~4) orthogonal test. With EtOH extraction and water sed, alkali washing, EtOAC extraction as main methods of eliminate dopant. Finally with alky AlzO3 chromatographic column, rich and gain anticancer active site. The maximum response was achieved at a 40 min extracting time with 10 times volume 90% EtOH added to the sample for the first time and 30 min for the second time. Adding 10 times water will produce precipitation; Place the precipitation into 6 times petroleum benzin to de-fat at 60℃.

云南红豆杉中抗癌活性物制备工艺研究方法：利用正交设计试验L9(3~4)确定原料药提取工艺为：10倍量90％乙醇提取两次，第一次40分钟，第二次30分钟；醇提液用10倍量水沉；沉淀加6倍量石油醚40℃脱脂；用1mol／L的NaOH溶液碱洗，除去酸性杂质；以碱性氧化铝柱，以环己烷／丙酮为洗脱溶剂，在环己烷-丙酮(6：4)段富集到所需活性部位，洗脱剂用量为3VB。

Study on the diffusing behavior of water through alkyd coatings by EIS.

颜料体积浓度对水在醇酸涂层中传输行为的影响。

A general program of formulating of recipe suitable for self-drying water-soluble alkyd resin was established.

建立了适合于水溶性醇酸树脂配方设计的通用程序。

Treatment of improving salt fog resistance of water-borne alkyd paste paint is introduced.

介绍了改进水溶性醇酸厚浆漆耐盐雾性能所采取的措施。

Cyclohexene was synthesized by dehydration of cyclohexanol with anhydrous aluminum chloride as catalyst.

以无水三氯化铝作催化剂，对环己醇脱水制备环己烯的反应进行研究。

The quality control was made through the preparation, character, pH value, distinguish, animalcule limit and stability.

方法采取水提醇沉法制备，从制剂的性状、pH值、鉴别、含量、微生物限度和稳定性考察等方面进行质量控制；并以该制剂进行临床观察。

Methodswe adopted water-extraction and alcohol-precipitation to make yinjiefujing lotion.the quality control was made through the preparation, character, ph value, distinguish, animalcule limit and stability.

方法采取水提醇沉法制备，从制剂的性状、ph值、鉴别、含量、微生物限度和稳定性考察等方面进行质量控制；并以该制剂进行临床观察。

Now, a convenient, efficient pinacol coupling of aldehydes mediated by zinc in good yields has been carried out in ammonia water in the presence of a little crown ether. Adding a small amount of crown ether was highly effective to enhance the yields of pinacol from 63% to 84%.

本文报道一种简便、有效的水相呐偶合反应，它是在含有少量冠醚的稀氨水溶液中，使用锌粉促进醛基化合物进行水相呐偶合反应，其中加入少量的冠醚有助于提高反应的产率，呐醇产率由63%提高到84%。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。