水化合物

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

Simply, the hydrate is a compound containing water molecules and secondary school textbooks mentioned on the alum, gypsum, and blue vitriol, are the most famous hydrate.

简单地来说，水合物是含有水分子的化合物，中学课本上提到的明矾、石膏和蓝矾等，都是最著名的水合物。

Bulbil ; antioxidative activity ; total phenolic content ; ferulic acid ; p-coumaric acid ; cooking ; future ; after

山药零余子；抗氧化活性；酚类化合物；阿魏酸；香豆酸；水煮；总类黄酮；乙酸乙酯；尿囊素；总含量；方程式

This can be accomplished by ponding with water,covering with burlap or polyethylene sheets,or spraying with an approved curing compound.

这可以通过筑成池塘完成用，盖用粗麻布或聚乙烯板料或者喷洒与一种批准的治疗的化合物的水。

Have keep clear of freedom radical and but block breaks what lipoid apperception closes matter to cross oxidation to react, maintain the normal function of cellular film thereby, action declines to beautiful capacitive reactance since.

水杨梅素。具有清除自由基及可阻断类脂类化合物的过氧化反应，从而维持细胞膜的正常功能，起到美容抗衰作用。

The sample was extracted with carbon bisulfide, and the extraction was injected into the GC system for analysis after dehydration by sodium sulfate anhydrite.

水样用二硫化碳萃取，萃取液经无水硫酸钠脱水后在适宜的色谱条件下进样分析，5种氯苯类化合物的回收率为92.3%~102.5%，精密度为

A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.

轻而软的银白色碱金属元素，空气中能迅速氧化，能与水发生剧烈反应，以天然化合物状态大量存在于海水、光卤石、钾盐镁矾和钾盐中。

In 1783 Henry Cavendish and James Watt both contributed to the thought that water was a compound.

在内1783亨利卡文迪什和詹姆士瓦特都有助于认为水是一种化合物。

Water is the most abundant chemical compound in the boisphere.

水是生物圈中最丰富的化合物。

Six, chemical pollution Industrial millions of compound exist in the air, soil and water, plant, animal and human.

六、化学污染工业带来的数百万种化合物存在于空气、土壤、水、植物、动物和人体中。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐