乙醛

Paraldehyde, INH, lactic acid...

三聚乙醛，乳酸，异烟肼。。。

Besides,there are CS2 chloride method producing CCl4,C1-C2 chlorohydrocarbon perchloride method producing CCl4 and by-prodcucing CCl4,and chloroil method oracetaldehyde method producing CHCl4 etc.

此外，还有二硫化碳氯化法生产四氯化碳、 C1-C3废氯烃全氯化法生产四氯化碳并联产四氯乙烯以及氯油法或，乙醛法生产氯仿等。

The response to single compound: To both females and males, the compounds that elicit larger responses of adults are benzaldehyde, benzene acetaldehyde, hexanol,β-phenyl ethyl alcohol, benzyl alcohol, cyclohexanol and eugenol. Phytol, 2-methyl-cyclohexanone and β-caryophyllene reveal to have weaker activity.

对单一化合物的反应：两种昆虫，不论是雌蛾还是雄蛾，能引起较强EAG反应的化合物均为苯甲醛、苯乙醛、正己醇、β-苯乙醇、苯甲醇、环己醇和丁香酚，植醇、2-甲基环己烷和β-石竹烯仅能引起微弱的EAG反应。

In this paper, using REMPI-TOF technique, multiphoton dissociation/ionization of sulfur and carbon contained polyatomic molecule has been carried out. The mechanism ofmultiphoton dissociation/ionization was discussed, and some valuable results are obtained. The paper has six chapters.

本论文用共振增强多光子电离-时间飞行质谱等实验技术研究了二硫化碳、甲醇和乙醛分子的多光子解离或电离的动力学过程，对多光子解离或电离产物的产生机理进行了分析和讨论，得到了一些有意义的实验结果。

Containing 4 per cent its weight of potassium cyanide (5.9 g) when an energetic reaction set in almost instantly.

但当反应液中氰化物浓度减低时，三氯乙醛水解分裂生成氯仿的趋势即逐渐增加。

The result was shown as follows:compared with the good quality beer,the diacetyl,aldehyde,islobutyl alcohol,isoamyl alcohol and total acid were higher,however,propyl alcohol and ethyl butyrate were lower

研究中还发现污染细菌后的发酵过程中的pH下降迅速，降糖加快，最终得到的啤酒中双乙酰、乙醛、异戊醇、异丁醇和总酸偏高，而正丙醇、丁酸乙酯含量偏低。

To an asymmetric synthesis of (1), we applied a type of Roush addition in the first step to introduce the C4 stereocenter, and then the chair substance -122 are readily transformed into the title compound -aphanorphine using the same route as to the racemic target molecular.

aphanorphine分子的不对称合成是在第一步通过对甲氧基苯乙醛（119）发生Roush反应引入手性，得到手性高烯丙醇-122，然后利用与合成外消旋目标分子相同的方法，光学纯化合物-122经一系列转化可得到光学纯中间体化合物139；化合物139发生分子内傅—克反应的过程中，由C4位手性立体特异地控制C1位手性的生成，从而解决-aphanorphine分子中的手性问题。

Clouds with extremely cool water are mixed with man-made ice crystals, such as silver iodide and metaldehyde crystals.

极冷云水混有人造冰晶如碘化银和四聚乙醛晶体。

Being combining with products distribution in styrene oxidation, we propose the styrene epoxidation carry out with Ti metallacyclo intermediates, And at the same time Ti-ZSM-5 have properties both catalytic epoxidation and acid-catalysis, namely the skeletal Ti can catalyze styrene epoxidation to styrene oxide and the skeletal Ti and Al can provide Lewis acid site to cause the rearrangement of styrene oxide to phenylacetaldehyde rapidly, the solvolysis to glycols and the cleavage of C=C double bond. Ti-ZSM-5 can also provide Bronsted acid site simultaneously, which is also catalytic center for the solvolysis to glycols.

同时结合Ti-ZSM-5催化选择性氧化苯乙烯反应的产物分布结果，提出苯乙烯环氧化反应可能是通过金属有机环机理进行；Ti-ZSM-5同时具有催化环氧化和酸催化两种功能，其骨架钛可催化苯乙烯环氧化生成环氧苯乙烷，而骨架钛和骨架铝等可提供Lewis酸位使环氧苯乙烷迅速发生重排生成苯乙醛从而使其成为反应的主要产物，同时还可发生加成以及碳碳键的裂解等副反应：Ti-ZSM-5也提供Bronsted酸位，它也是生成加成产物的活性中心。

The accumulating plant physiological information shows that plant hormones, especially such as IAA, play very important roles during head leaf development, The experiment that transfering aux1 and aux2 genes (respectively encode trytophan monooxygenase and indoleacetamide hydrolase, which are needed for two-step synthesis of IAA) into Chinese cabbage-pe-tsai proves such supposal.

现有的植物生理学研究认为，植物激素特别是IAA在叶片的弯曲上起重要作用，将IAA合成中的色胺酸加氧酶基因aux1和吲哚乙醛还原酶基因aux2转入大白菜中的实验也支持了生理学的这一推测。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。