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These reactions are usually the catalyst in acid or alkali under ...

这些反应通常在酸或碱的催化作用下进行。。。。

How can take from content of alkali in cement?

如何降低水泥中碱的含量?

Objective:To establish an HPLC method for determination of berberine hydrochloride in Fukezhidai capsules.

目的:建立妇科止带胶囊中盐酸小檗碱的含量测定方法。

Early thousands years ago, the probability of biological process of soda ash from sodium sulfate was revealed in Egyptian Wadi Naturn sediments. Every year the crude sesquioxide alkali crystallized and collected from the lakes was roughly the amount of the sulphate brought and reduced by the incoming river water.

早在几千年前的埃及Wadi Naturn沉积岩中便向人们揭示了芒硝生物制碱的可能性,每年从这些湖里结晶和采收的粗倍半碱与进水带入并产生还原的硫酸盐的量大致相当。

There are four parts in this thesis, the main works of author are summarized and presented as follows:1. Multivariate curve resolution with alternating least squares and alternating trilinear decomposition are applied in the resolution of overlapping peaks of camptothecin and 7-ethyl-10-hydroxy- camptothecin (SN-38) from HPLC-DAD.

全文共分四章,作者的主要工作有以下三个方面:一、采用HPLC-DAD检测,结合多元曲线分辨-交替最小二乘和交替三线性分解方法对未优化的色谱分离条件下产生的7-乙基-10-羟基喜树碱(SN-38)和喜树碱的严重重叠的色谱峰进行分辨。

The anti-ischemia effect in myocardium of corydalis rhizoma is related to the direct protective effects on cardiomyocytes of its components, tetrahydropalmatine, dehydrocorydaline, berberine and palmatine, amomg which tetrahydropalmatine and dehydrocorydaline are the most important, the former with high safety and low efficacy, while the latter with low safety and high efficacy. And the direct protective effects on cardiomyocytes of these four components, may be attained through mechanisms other than anti-peroxidation.

延胡索抗心肌缺血损伤的作用与其成分延胡索乙素、脱氢紫堇碱、黄连素和巴马汀对心肌细胞的直接保护能力有关;其中,延胡索乙素和脱氢紫堇碱的作用最为重要,前者安全性高,但效能较低,后者安全性低,而效能较高;而这4个单体的保护作用可能是通过抗氧化损伤之外的机制达到的。

The anti-ischemia effect in myocardium of Rhizoma Corydalis is related to the direct protective effects on cardiomyocytes of its components, tetrahydropalmatine, dehydrocorydaline, berberine and palmatine, amomg which tetrahydropalmatine and dehydrocorydaline are the most important, the former with high safety and low efficacy, while the latter with low safety and high efficacy. And the direct protective effects on cardiomyocytes of these four components may be attained through mechanisms other than anti-peroxidation.

延胡索抗心肌缺血损伤的作用与其成分延胡索乙素、脱氢紫堇碱、黄连素和巴马汀对心肌细胞的直接保护能力有关;其中,延胡索乙素和脱氢紫堇碱的作用最为重要,前者安全性高,但效能较低,后者安全性低,而效能较高;而这4个单体的保护作用可能是通过抗氧化损伤之外的机制达到的。

Its mechanism is the use of anthraquinone in alkali conditions off proton surface forming 10 more stable carbon anion face, but because carbon anion and oxygen ion exist between testosterone and enolate type each other changes, cause reaction product complex, at least five, reaction selectivity, product yield, separation difficulties, and product purity is not high, therefore, using the type and quantity of alkali, phase transfer catalyst type, solvent, to optimize the selection process conditions so as to improve the yield target product.

其机理是利用蒽酮在碱存在的条件下脱去氢质子面形成10位较稳定的碳负离子面进行,但是因为碳负离子和氧负离子之间存在酮式和烯醇式的互变,导致反应复杂,产物至少有五种,反应选择性差,产物分离困难,产率低,且产品纯度不高,因此,利用对碱的种类和量的多少,相转移催化剂的种类,反应溶剂的选择,来优化反应工艺条件从而提高目标产物的产率。

This is one kind by the neutral distilled water the bamboo coal factor which for the carrier, auxiliary purifies and essential becomes the membrane assistant, to seal the solid anti-alkali member contour molecular compound naturally to undergo a series of complex craft purification to become, this green environmental protection, can form compact protective film fast on the wall surface, has the stable wall surface, waterproof, the anti-alkali function, can prevent the wallpaper mildewy deterioration effectively, the enhancement wallpaper and the wall coheres the strength, is advantageous in the wallpaper construction, the extension wallpaper service life.

本品是一种以中性蒸馏水为载体、辅以精制的竹炭因子和必要的天然成膜助剂、封固抗碱分子等高分子化合物经过一系列复杂的工艺精制而成,本品绿色环保,能快速在墙面上形成一层致密的保护膜,具有稳定墙面,防水、抗碱的作用,能有效防止壁纸发霉变质,增强壁纸与墙体黏结力,有利于壁纸施工,延长壁纸的使用年限。

Disulfiram has a dual effect, he noted. It reduces the craving for cocaine that usually occurs 15 minutes or so after the "high" is over. It also enhances the unpleasant nervous paranoia that is seen in about half of cocaine users.

他表示,disulfiram具有双重作用,这个药物降低对古柯碱的渴望,这通常发生在用药的15分钟之内或是因此造成兴奋的感觉过去;有半数使用古柯碱的病患会产生不愉快且紧张的感觉。

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

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