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aldehyde collidine相关的网络例句

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与 aldehyde collidine 相关的网络例句 [注:此内容来源于网络,仅供参考]

A new process for the preparation of 5-bromo-vanillin with vanillic aldehyde as raw material,AlBr3 as activator,HBr and H2O2 as brominating agent and anhydrous alcohol as solvent was developed in this paper.

摘 要:以甲基香兰素为原料,氢溴酸与过氧化氢为溴化剂,溴化铝为催化剂,无水乙醇为溶剂制备5-溴香兰素。

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法,以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂,质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别;并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

Chapter three: A CE method to separate and determine the five active components, gastrodin, vanillyl alcohol, p-hydoxvhenzyl alcohol, \inllln and p-hydroxybenzyl aldehyde in Chinese herb Gastrvdiri Juiti Bl. and its preparations was developed.

第三章:建立了分析和分离中药天麻及其制剂中5种有效成分—天麻素、对羟基苯甲醇、香草醇、香草醛、对羟基苯甲醛—的毛细管区带电泳方法。

A new method for determining second virial coefficients of ketone, aldehyde, aether and nitrogenous compounds was developed based on the corresponding-states principle.

本文提出了一套新的用来确定酮、醛、醚和含氮化合物第二维里系数的新方法。

The GC-MS results indicated that a small quantity of lesser carbonnumber of aldehyde compounds were included in the organic compounds of PM, besidesbiggish carbon number of fatty hydrocarbon and volatilizable aromatic hydrocarbon, such asbenzene, methylbenzene, dimethylbenzene and etc.

GC/MS定性分析结果表明,在颗粒物所含有机化合物中,除了含有较高碳数的脂肪烃化合物、芳香族化合物如:苯、甲苯、二甲苯等低沸点易挥发的化合物外,还发现了微量的低碳数醛类化合物。

The methyl pheophorbide-a (5) was oxidized with osmium oxide and sodium periodate to give chlorin 8 which was converted into aldehyde purpure-18 (9) and purpure-7 trimethyl ester (10) by air-oxidation in butanol in the presence of sodium.

选用四氧化锇和高碘酸钠将5氧化成卟吩醛(8),在丁醇中以丁醇钠作催化剂, 8的氧化和重排反应给出3-甲酰基紫红素-18酯(9)和紫红素-7三甲酯衍生物10。

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇,俗称原维生素B_5,属维生素B旋类营养增补剂,广泛应用于医药、化妆品、食品、饲料等领域,本文着重探讨了其制备及关键因素的优化,主要内容可分三部分:第一是D-泛内酯的制备,先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯,再经催化氢化得到DL-泛内酯,然后通过物理拆分获得D-泛内酯,得到产物的比旋光度与进口产品基本一致。

Warm liquor or yellow wine may be aroma for drinking and some bad substances like aldehyde with low boiling point could be volatilized so as to reduce injurious ingredients.

不管是白酒、黄酒,加温后饮用:一是芳香适口;二是可挥发掉一些沸点低的醛类有害物质,减少有害成分。

The results showed that Kaidimycin was chemically neutral, macrocylic polylactones, stable and liable to dissolve into water and pyridine, slight to dissolve into methanol, ethanol and N-butanol, difficult to dissolve into ethyl acetate, acetone, benzene and chloroform. Chemical reaction of functional group of Kaidimycin showed that it had glycoside, amino acid and aldehyde, no reducing sugar, polypeptide and phenol.

凯地菌素属中等极性的、中性抗生素,极性纸层析结果与多烯类抗生素的纸层析结果相似:易溶于水、吡啶,微溶于甲醇、乙醇、正丁醇,不溶于乙酸乙酯、丙酮、苯、三氯化碳;对高温、光照和紫外处理有很好的稳定性;官能团反应试验结果发现,凯地菌素可能含有糖苷键、氨基酸伯氨基和醛基,不含有还原糖、多肽和酚基,高锰酸钾、浓硫酸反应与多烯大环内酯类抗生素的特性相似;并且依据纯品,采用生物法和分光光度法对摇床发酵液进行了效价的测定。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后,在游离基条件下进行侧链的氯化,得到2,4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解,经过2,4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离),得到2,4-二氯-5-氟-3-甲酰苯甲酸,将其醛基反应,得到2,4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸,用酰氯从其中除去水,同时将羧基转化为碳酰氯,得到一种腈,即2,4-二氯-3-氰基-5-氯-苯甲酰氯。

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推荐网络例句

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。

The difference. But you don抰 use diagonals when photographing do you.

所以,如果你要摄影的话,请不要用天顶镜。